/* roulang page: index */
:root {
            --c-canvas: #F2F6F9;
            --c-surface: #FFFFFF;
            --c-surface-soft: #EAF1F6;
            --c-primary: #1B5C74;
            --c-primary-dark: #0F3B4C;
            --c-primary-light: #DDEBF2;
            --c-accent: #DE7C3A;
            --c-accent-dark: #C46428;
            --c-accent-light: #F9E6DA;
            --c-text: #1B2A33;
            --c-muted: #5A7380;
            --c-line: #DCE8EE;
            --c-white: #FFFFFF;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow-card: 0 14px 30px rgba(18, 58, 78, 0.08);
            --shadow-hover: 0 20px 40px rgba(18, 58, 78, 0.12);
            --border-light: 1px solid var(--c-line);
        }

        * {
            box-sizing: border-box;
        }

        html {
            -webkit-text-size-adjust: 100%;
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background-color: var(--c-canvas);
            color: var(--c-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--c-primary);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--c-accent-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea {
            font-family: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(222, 124, 58, 0.35);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: var(--c-text);
            margin-top: 0;
            margin-bottom: .5em;
        }

        p {
            margin-top: 0;
        }

        .container-main {
            max-width: 1180px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-block {
            padding: clamp(64px, 9vw, 110px) 0;
        }

        .bg-soft {
            background: var(--c-surface-soft);
        }

        .section-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 52px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--c-primary);
            background: var(--c-primary-light);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            letter-spacing: .04em;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(26px, 3.6vw, 38px);
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-lead {
            color: var(--c-muted);
            font-size: 16px;
            margin-bottom: 0;
        }

        /* buttons */
        .btn {
            border-radius: var(--radius-pill);
            padding: 11px 25px;
            font-weight: 600;
            border: 1px solid transparent;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .25s ease;
        }

        .btn-accent {
            background: var(--c-accent);
            color: #fff;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background: var(--c-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(222, 124, 58, .2);
        }

        .btn-outline-primary {
            background: transparent;
            color: var(--c-primary);
            border: 1px solid rgba(27, 92, 116, 0.45);
        }

        .btn-outline-primary:hover {
            background: var(--c-primary-light);
            color: var(--c-primary-dark);
            border-color: var(--c-primary);
            transform: translateY(-2px);
        }

        .btn-white-outline {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.6);
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, .12);
            color: #fff;
            border-color: #fff;
        }

        /* header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: var(--c-white);
            border-bottom: 1px solid var(--c-line);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
            min-height: 72px;
        }

        .brand-logo {
            display: inline-flex;
            flex-direction: column;
            line-height: 1.1;
            text-decoration: none;
            color: var(--c-primary-dark);
        }

        .brand-main {
            font-size: 24px;
            font-weight: 800;
            color: var(--c-primary-dark);
            letter-spacing: .06em;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--c-muted);
            letter-spacing: .18em;
            margin-top: 1px;
            font-weight: 500;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .header-nav .nav-link {
            position: relative;
            color: var(--c-muted);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            padding: 12px 0 10px;
        }

        .header-nav .nav-link:hover {
            color: var(--c-primary);
        }

        .header-nav .nav-link.active {
            color: var(--c-primary);
            font-weight: 600;
        }

        .header-nav .nav-link.active::after {
            content: "";
            position: absolute;
            width: 20px;
            height: 2px;
            background: var(--c-accent);
            left: 0;
            right: 0;
            margin: auto;
            bottom: 4px;
            border-radius: 2px;
        }

        .header-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 0;
            background: transparent;
            color: var(--c-primary-dark);
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-pill);
            cursor: pointer;
        }

        .header-toggle:hover {
            background: var(--c-surface-soft);
        }

        /* hero */
        .home-hero {
            padding: clamp(54px, 8vw, 100px) 0 70px;
            background: linear-gradient(180deg, #F7FAFC 0%, var(--c-canvas) 100%);
            overflow: hidden;
        }

        .hero-title {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            color: var(--c-primary-dark);
            margin-bottom: 20px;
            letter-spacing: -.01em;
        }

        .hero-subtitle {
            color: var(--c-muted);
            font-size: 17px;
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 30px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            background: var(--c-white);
            color: var(--c-primary);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-pill);
            padding: 7px 14px;
            font-size: 13px;
            font-weight: 500;
            box-shadow: 0 6px 14px rgba(18, 58, 78, .04);
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual .hero-img-wrap {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
            z-index: 2;
            background: var(--c-primary-light);
        }

        .hero-visual .hero-img-wrap img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .hero-visual::before {
            content: "";
            position: absolute;
            top: -28px;
            right: -24px;
            width: 46%;
            height: 38%;
            border-radius: 28px;
            background: var(--c-accent-light);
            z-index: 1;
        }

        .hero-visual::after {
            content: "";
            position: absolute;
            bottom: -26px;
            left: -20px;
            width: 52%;
            height: 34%;
            border-radius: 26px;
            background: var(--c-primary-light);
            z-index: 0;
        }

        @media (max-width: 991px) {
            .hero-visual {
                margin-top: 42px;
            }
        }

        /* services */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--c-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            transition: transform .25s ease, box-shadow .25s ease;
            border: 0;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .service-icon {
            width: 46px;
            height: 46px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: var(--c-primary-light);
            color: var(--c-primary);
            margin-bottom: 18px;
        }

        .service-icon svg {
            width: 24px;
            height: 24px;
            stroke: currentColor;
            fill: none;
            stroke-width: 1.8;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .service-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .service-card p {
            color: var(--c-muted);
            font-size: 14px;
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .service-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-primary);
        }

        .service-link svg {
            width: 16px;
            height: 16px;
            transition: transform .25s ease;
        }

        .service-link:hover svg {
            transform: translateX(3px);
        }

        @media (max-width: 991px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }

        /* metrics */
        .metrics-section {
            position: relative;
            background: var(--c-primary-dark);
            color: #DCE8EE;
            padding: 72px 0;
        }

        .metric-head-text {
            text-align: center;
            margin-bottom: 46px;
        }

        .metric-head-text h2 {
            color: #fff;
        }

        .metric-head-text p {
            color: rgba(255, 255, 255, .6);
            max-width: 640px;
            margin: 0 auto;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .metric-item {
            padding: 16px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .08);
        }

        .metric-num {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            font-variant-numeric: tabular-nums;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }

        .metric-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .68);
        }

        @media (max-width: 768px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
        }

        /* scenarios */
        .scenario-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 60px;
            margin-bottom: 58px;
        }

        .scenario-block:last-child {
            margin-bottom: 0;
        }

        .scenario-media {
            position: relative;
            border-radius: 22px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .scenario-media img {
            width: 100%;
            height: 300px;
            object-fit: cover;
        }

        .scenario-content .scenario-no {
            font-size: 14px;
            font-weight: 700;
            letter-spacing: .12em;
            color: var(--c-accent);
            text-transform: uppercase;
            margin-bottom: 6px;
        }

        .scenario-content h3 {
            font-size: clamp(21px, 2.4vw, 26px);
            font-weight: 700;
            margin-bottom: 10px;
        }

        .scenario-content p {
            color: var(--c-muted);
            font-size: 15px;
            margin-bottom: 16px;
        }

        .scenario-link {
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 15px;
        }

        @media (max-width: 820px) {
            .scenario-block {
                grid-template-columns: 1fr;
                gap: 28px;
                margin-bottom: 48px;
            }

            .scenario-content {
                order: 2;
            }

            .scenario-media {
                order: 1;
            }

            .scenario-block:nth-of-type(2) .scenario-media {
                order: 1;
            }

            .scenario-block:nth-of-type(2) .scenario-content {
                order: 2;
            }
        }

        /* solutions */
        .solutions-wrap {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 64px;
            align-items: start;
        }

        .solutions-sticky {
            position: sticky;
            top: 110px;
        }

        .solution-list {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .solution-item {
            display: flex;
            gap: 18px;
            padding: 22px 24px;
            background: var(--c-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .solution-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .solution-number {
            min-width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--c-primary-light);
            color: var(--c-primary);
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            line-height: 1;
        }

        .solution-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .solution-item p {
            color: var(--c-muted);
            font-size: 14px;
            margin-bottom: 0;
            line-height: 1.75;
        }

        .solution-cta {
            margin-top: 36px;
        }

        .solution-cta .btn {
            margin-right: 10px;
            margin-bottom: 10px;
        }

        @media (max-width: 880px) {
            .solutions-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .solutions-sticky {
                position: static;
            }
        }

        /* news / cms */
        .news-panel {
            background: var(--c-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .news-list {
            padding: 8px 0;
        }

        .news-row {
            display: grid;
            grid-template-columns: 140px 1fr 150px auto;
            align-items: center;
            gap: 20px;
            padding: 22px 28px;
            border-top: 1px solid var(--c-line);
            color: var(--c-text);
            text-decoration: none;
            transition: background .25s ease;
            position: relative;
        }

        .news-row:first-child {
            border-top: 0;
        }

        .news-row:hover {
            background: var(--c-surface-soft);
            color: var(--c-text);
        }

        .news-date {
            font-size: 14px;
            color: var(--c-muted);
            font-variant-numeric: tabular-nums;
            letter-spacing: .02em;
        }

        .news-info {
            min-width: 0;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--c-text);
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-excerpt {
            font-size: 14px;
            color: var(--c-muted);
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-category {
            display: inline-block;
            background: var(--c-primary-light);
            color: var(--c-primary);
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            white-space: nowrap;
        }

        .news-arrow {
            color: var(--c-primary);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .news-arrow svg {
            width: 20px;
            height: 20px;
        }

        .news-empty {
            border: 1px dashed var(--c-line);
            margin: 28px;
            padding: 44px 20px;
            text-align: center;
            border-radius: var(--radius-md);
            color: var(--c-muted);
            background: var(--c-canvas);
            font-size: 15px;
        }

        .news-more {
            text-align: center;
            padding: 24px 20px 30px;
            border-top: 1px solid var(--c-line);
        }

        @media (max-width: 768px) {
            .news-row {
                grid-template-columns: 1fr auto;
                gap: 10px 14px;
                padding: 18px 20px;
            }

            .news-date {
                grid-column: 1 / -1;
                order: 0;
            }

            .news-category {
                order: 2;
                justify-self: end;
            }

            .news-info {
                order: 1;
                grid-column: 1 / -1;
            }

            .news-arrow {
                display: none;
            }
        }

        /* faq */
        .faq-width {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            background: var(--c-white);
            border: 1px solid var(--c-line) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: 0 7px 20px rgba(18, 58, 78, .03);
        }

        .faq-accordion .accordion-button {
            background: var(--c-white);
            color: var(--c-text);
            font-weight: 600;
            padding: 18px 22px;
            font-size: 16px;
            border: 0;
            box-shadow: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--c-white);
            color: var(--c-primary);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(222, 124, 58, .15);
        }

        .faq-accordion .accordion-button::after {
            content: "+";
            background: none;
            font-size: 24px;
            font-weight: 300;
            color: var(--c-primary);
            width: auto;
            height: auto;
            display: flex;
            align-items: center;
            justify-content: center;
            transform: none;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            content: "−";
            transform: none;
            color: var(--c-accent-dark);
        }

        .faq-accordion .accordion-body {
            padding: 0 22px 22px;
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.8;
        }

        /* contact */
        .contact-panel {
            border-radius: 24px;
            background: var(--c-white);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .contact-info {
            background: var(--c-primary-light);
            padding: 44px 42px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .contact-info h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .contact-info .lead {
            color: var(--c-primary-dark);
            opacity: .75;
        }

        .contact-meta {
            list-style: none;
            padding: 0;
            margin: 26px 0 0;
        }

        .contact-meta li {
            display: flex;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 15px;
            color: var(--c-text);
            align-items: flex-start;
        }

        .contact-meta svg {
            width: 20px;
            height: 20px;
            color: var(--c-accent);
            flex: 0 0 20px;
            margin-top: 2px;
        }

        .contact-form-wrap {
            padding: 44px 42px;
        }

        .contact-form .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--c-text);
        }

        .contact-form .form-control,
        .contact-form .form-select {
            border-radius: 12px;
            border: 1px solid var(--c-line);
            background: var(--c-canvas);
            padding: 11px 15px;
            font-size: 15px;
            transition: border-color .25s ease, box-shadow .25s ease;
        }

        .contact-form .form-control:focus {
            background: var(--c-white);
            border-color: var(--c-primary);
            box-shadow: 0 0 0 4px rgba(27, 92, 116, .1);
        }

        .contact-form textarea.form-control {
            min-height: 112px;
            resize: vertical;
        }

        .submit-hint {
            margin-top: 12px;
            color: var(--c-muted);
            font-size: 13px;
        }

        .submit-hint.submitted {
            color: var(--c-primary);
            font-weight: 600;
        }

        @media (max-width: 820px) {
            .contact-info,
            .contact-form-wrap {
                padding: 30px 22px;
            }
        }

        /* footer */
        .site-footer {
            background: var(--c-primary-dark);
            color: rgba(255, 255, 255, .74);
            margin-top: clamp(64px, 9vw, 100px);
        }

        .footer-main {
            padding: 70px 0 44px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.8fr 0.9fr 0.9fr;
            gap: 40px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: .04em;
        }

        .footer-brand {
            display: inline-flex;
            flex-direction: column;
            margin-bottom: 12px;
            color: #fff;
            line-height: 1.15;
            text-decoration: none;
        }

        .footer-brand-main {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: .04em;
        }

        .footer-brand-sub {
            font-size: 12px;
            letter-spacing: .12em;
            color: rgba(255, 255, 255, .55);
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .62);
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .66);
            font-size: 14px;
            text-decoration: none;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 14px;
        }

        .footer-bottom .footer-domain {
            font-size: 14px;
            color: rgba(255, 255, 255, .42);
            margin: 0;
            font-variant-numeric: tabular-nums;
        }

        .footer-bottom .footer-copy {
            color: rgba(255, 255, 255, .72);
            margin: 0;
            font-size: 14px;
        }

        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* responsive nav */
        @media (max-width: 991px) {
            .header-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 18px 26px 30px;
                border-bottom: 1px solid var(--c-line);
                transform: translateY(-16px);
                opacity: 0;
                visibility: hidden;
                pointer-events: none;
                transition: transform .3s ease, opacity .3s ease, visibility .3s ease;
                z-index: 1030;
                max-height: calc(100vh - 72px);
                overflow: auto;
            }

            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
            }

            .header-nav .nav-link {
                font-size: 18px;
                padding: 16px 4px;
                border-bottom: 1px solid var(--c-line);
                border-radius: 0;
            }

            .header-nav .nav-link.active {
                padding-left: 14px;
                border-bottom-color: var(--c-primary-light);
                background: var(--c-surface-soft);
                border-radius: var(--radius-sm);
            }

            .header-nav .nav-link.active::after {
                display: none;
            }

            .header-toggle {
                display: inline-flex;
            }

            body.nav-open {
                overflow: hidden;
            }

            .hero-title {
                font-size: clamp(28px, 6vw, 42px);
            }
        }

        @media (max-width: 520px) {
            .container-main {
                padding-left: 18px;
                padding-right: 18px;
            }

            .site-header .header-inner {
                padding: 0 16px;
                min-height: 66px;
            }

            .brand-main {
                font-size: 21px;
            }

            .brand-sub {
                font-size: 11px;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
            --c-canvas: #F2F6F9;
            --c-surface: #FFFFFF;
            --c-surface-soft: #EAF1F6;
            --c-primary: #1B5C74;
            --c-primary-dark: #0F3B4C;
            --c-primary-light: #DDEBF2;
            --c-accent: #DE7C3A;
            --c-accent-dark: #C46428;
            --c-accent-light: #F9E6DA;
            --c-text: #1B2A33;
            --c-muted: #5A7380;
            --c-line: #DCE8EE;
            --c-white: #FFFFFF;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow-card: 0 14px 30px rgba(18, 58, 78, 0.08);
            --shadow-hover: 0 20px 40px rgba(18, 58, 78, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            -webkit-text-size-adjust: 100%;
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--c-text);
            background: var(--c-canvas);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--c-primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--c-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.25;
            margin: 0;
            color: var(--c-text);
        }

        p {
            margin: 0;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(222, 124, 58, 0.45);
            outline-offset: 3px;
            box-shadow: none;
        }

        .container-main {
            max-width: 1180px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 1px 0 rgba(15, 59, 76, 0.06);
        }

        .header-inner {
            max-width: 1180px;
            height: 72px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .brand-logo {
            display: inline-flex;
            flex-direction: column;
            line-height: 1.1;
            padding: 6px 0;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 22px;
            font-weight: 800;
            color: var(--c-primary);
            letter-spacing: 0.02em;
        }

        .brand-sub {
            font-size: 12px;
            margin-top: 3px;
            color: var(--c-muted);
            letter-spacing: 0.12em;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 34px;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-muted);
            display: inline-block;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease;
        }

        .nav-link:hover {
            color: var(--c-primary);
        }

        .nav-link.active {
            color: var(--c-primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: -2px;
            width: 20px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }

        .header-toggle {
            display: none;
            border: none;
            background: transparent;
            padding: 8px;
            color: var(--c-primary);
            cursor: pointer;
            border-radius: 8px;
        }

        .header-toggle:hover {
            background: var(--c-surface-soft);
        }

        /* ===== article layout ===== */
        .article-page {
            padding: 26px 0 90px;
        }

        .breadcrumbs {
            margin: 18px 0 22px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            font-size: 14px;
            color: var(--c-muted);
        }

        .breadcrumbs ol {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .breadcrumbs li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumbs li + li::before {
            content: "/";
            color: #9BB2BE;
        }

        .breadcrumbs a {
            color: var(--c-muted);
            transition: color 0.2s ease;
        }

        .breadcrumbs a:hover {
            color: var(--c-primary);
        }

        .breadcrumbs li[aria-current="page"] {
            color: var(--c-text);
            font-weight: 500;
            max-width: 340px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-shell {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: clamp(28px, 5vw, 64px);
            margin-top: 8px;
        }

        .article-inner {
            max-width: 860px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 30px;
        }

        .article-meta-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 16px;
            color: var(--c-muted);
            font-size: 14px;
        }

        .badge-category {
            display: inline-block;
            border-radius: var(--radius-pill);
            background: var(--c-primary-light);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            line-height: 1.4;
        }

        .meta-dot {
            width: 3px;
            height: 3px;
            background: #A9BBC4;
            border-radius: 50%;
            display: inline-block;
            margin: 0 2px;
        }

        .article-title {
            font-size: clamp(30px, 4.4vw, 46px);
            line-height: 1.28;
            letter-spacing: -0.01em;
            margin: 14px 0 18px;
            color: var(--c-text);
            overflow-wrap: anywhere;
        }

        .article-meta-info {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px 22px;
            color: var(--c-muted);
            font-size: 14px;
            border-top: 1px solid var(--c-line);
            padding-top: 18px;
        }

        .meta-source svg {
            width: 15px;
            height: 15px;
            margin-right: 6px;
            vertical-align: -2px;
            stroke: currentColor;
        }

        .article-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin: 32px 0 34px;
            box-shadow: var(--shadow-card);
        }

        .article-cover img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            aspect-ratio: 16 / 9;
        }

        .article-content {
            color: var(--c-text);
            font-size: 17px;
            line-height: 1.9;
        }

        .article-content p {
            margin-bottom: 1.25em;
        }

        .article-content h2 {
            font-size: 26px;
            margin: 40px 0 18px;
            padding-top: 26px;
            border-top: 1px solid var(--c-line);
        }

        .article-content h3 {
            font-size: 21px;
            margin: 32px 0 14px;
        }

        .article-content h4 {
            font-size: 18px;
            margin: 26px 0 12px;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.4rem;
            margin: 0 0 1.3rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
        }

        .article-content blockquote {
            border-left: 3px solid var(--c-primary-light);
            background: var(--c-surface-soft);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 16px 22px;
            margin: 1.6rem 0;
            color: var(--c-muted);
        }

        .article-content a {
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .article-content table {
            width: 100%;
            margin: 26px 0;
            border-collapse: collapse;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--c-line);
            padding: 10px 14px;
            background: var(--c-white);
        }

        .article-content th {
            background: var(--c-surface-soft);
            font-weight: 600;
        }

        .article-end {
            border-top: 1px solid var(--c-line);
            margin-top: 48px;
            padding-top: 24px;
            text-align: right;
            color: var(--c-muted);
            font-size: 14px;
        }

        /* ===== related ===== */
        .related-section {
            border-top: 1px solid var(--c-line);
            margin-top: 48px;
            padding-top: 42px;
        }

        .section-heading {
            margin-bottom: 24px;
        }

        .section-label {
            display: inline-block;
            font-size: 14px;
            letter-spacing: 0.08em;
            font-weight: 700;
            color: var(--c-accent);
            margin-bottom: 8px;
        }

        .section-heading h2 {
            font-size: 28px;
            margin: 0 0 8px;
        }

        .section-heading p {
            color: var(--c-muted);
            font-size: 15px;
            max-width: 620px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .related-card {
            background: var(--c-canvas);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.2s ease;
            height: 100%;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
            background: var(--c-surface);
        }

        .related-card-top {
            display: flex;
            justify-content: space-between;
            gap: 10px;
            align-items: center;
            margin-bottom: 14px;
        }

        .related-card-top .badge-category {
            font-size: 12px;
            padding: 3px 10px;
        }

        .related-time {
            font-size: 13px;
            color: var(--c-muted);
            font-variant-numeric: tabular-nums;
        }

        .related-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .related-card h3 a {
            color: var(--c-text);
        }

        .related-card h3 a:hover {
            color: var(--c-accent);
        }

        .related-card p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .related-more {
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .related-more svg {
            width: 15px;
            height: 15px;
            transition: transform 0.2s ease;
        }

        .related-more:hover svg {
            transform: translateX(3px);
        }

        .related-action {
            margin-top: 34px;
            text-align: center;
        }

        /* ===== support CTA ===== */
        .support-panel {
            margin-top: 48px;
            background: var(--c-surface-soft);
            border-radius: var(--radius-lg);
            padding: clamp(28px, 4.5vw, 52px);
            display: flex;
            gap: 30px;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .support-panel h2 {
            font-size: 24px;
            line-height: 1.45;
            margin: 0 0 10px;
        }

        .support-panel p {
            color: var(--c-muted);
            max-width: 760px;
            font-size: 15px;
        }

        .support-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== buttons ===== */
        .btn-main,
        .btn-outline-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            min-height: 44px;
            padding: 10px 26px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 1px solid transparent;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
            cursor: pointer;
            text-align: center;
            white-space: nowrap;
        }

        .btn-main {
            background: var(--c-accent);
            color: var(--c-white);
            box-shadow: 0 8px 20px rgba(222, 124, 58, 0.24);
        }

        .btn-main:hover {
            background: var(--c-accent-dark);
            color: var(--c-white);
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(196, 100, 40, 0.26);
        }

        .btn-outline-main {
            background: transparent;
            color: var(--c-primary);
            border-color: rgba(27, 92, 116, 0.5);
        }

        .btn-outline-main:hover {
            background: var(--c-primary-light);
            color: var(--c-primary);
            border-color: var(--c-primary);
            transform: translateY(-2px);
        }

        /* ===== missing ===== */
        .missing-wrap {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: clamp(40px, 8vw, 90px) 24px;
            text-align: center;
            margin-top: 20px;
        }

        .missing-wrap h1 {
            font-size: 34px;
            margin-bottom: 14px;
        }

        .missing-wrap p {
            color: var(--c-muted);
            max-width: 440px;
            margin: 0 auto 28px;
        }

        /* ===== footer ===== */
        .site-footer {
            background: var(--c-primary-dark);
            color: #C6DCE5;
            padding-top: clamp(48px, 6vw, 72px);
        }

        .footer-main {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            margin-bottom: 16px;
            color: var(--c-white);
        }

        .footer-brand-main {
            font-size: 24px;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 0.02em;
        }

        .footer-brand-sub {
            font-size: 13px;
            color: #A9C7D3;
            letter-spacing: 0.1em;
            margin-top: 4px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #B8CFD9;
            max-width: 300px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #B8CFD9;
            font-size: 14px;
            display: inline-block;
            position: relative;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--c-accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(202, 226, 234, 0.12);
            background: rgba(6, 31, 42, 0.4);
        }

        .footer-bottom .container-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 22px;
            padding-bottom: 22px;
            flex-wrap: wrap;
        }

        .footer-copy {
            color: #B8CFD9;
            font-size: 13px;
        }

        .footer-domain {
            color: #8FB2C0;
            font-size: 13px;
            font-variant-numeric: tabular-nums;
        }

        /* ===== responsive ===== */
        @media (max-width: 991px) {
            .header-inner {
                height: 66px;
            }

            .header-nav {
                position: fixed;
                inset: 66px 0 auto 0;
                display: flex;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: rgba(248, 251, 252, 0.98);
                padding: 18px 24px 28px;
                border-bottom: 1px solid var(--c-line);
                box-shadow: 0 20px 30px rgba(18, 58, 78, 0.12);
                opacity: 0;
                visibility: hidden;
                transform: translateY(-8px);
                transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
                max-height: calc(100vh - 66px);
                overflow-y: auto;
                border-radius: 0 0 18px 18px;
            }

            .header-nav.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }

            .header-nav .nav-link {
                padding: 14px 4px;
                font-size: 17px;
                border-bottom: 1px solid var(--c-line);
                border-radius: 0;
            }

            .header-nav .nav-link.active::after {
                left: 0;
                transform: none;
                bottom: 0;
                width: 3px;
                height: 22px;
                border-radius: 2px;
            }

            .header-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px 28px;
            }
        }

        @media (max-width: 767px) {
            .article-page {
                padding: 10px 0 64px;
            }

            .article-shell {
                padding: 26px 18px;
                border-radius: var(--radius-md);
            }

            .article-title {
                font-size: 28px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .support-panel {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575px) {
            .container-main {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-inner {
                padding: 0 16px;
                height: 62px;
            }

            .footer-main {
                padding-left: 20px;
                padding-right: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .footer-stack .footer-col + .footer-col {
                margin-top: 22px;
            }

            .breadcrumbs {
                font-size: 13px;
                overflow-x: auto;
                flex-wrap: nowrap;
                padding-bottom: 4px;
                white-space: nowrap;
            }

            .breadcrumbs li[aria-current="page"] {
                max-width: 180px;
            }

            .support-actions .btn-main,
            .support-actions .btn-outline-main {
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
  --c-canvas: #F2F6F9;
  --c-surface: #FFFFFF;
  --c-surface-soft: #EAF1F6;
  --c-primary: #1B5C74;
  --c-primary-dark: #0F3B4C;
  --c-primary-light: #DDEBF2;
  --c-accent: #DE7C3A;
  --c-accent-dark: #C46428;
  --c-accent-light: #F9E6DA;
  --c-text: #1B2A33;
  --c-muted: #5A7380;
  --c-line: #DCE8EE;
  --c-white: #FFFFFF;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --shadow-card: 0 14px 30px rgba(18, 58, 78, 0.08);
  --shadow-hover: 0 20px 40px rgba(18, 58, 78, 0.12);
  --border-light: 1px solid var(--c-line);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--c-canvas);
  color: var(--c-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font-family: inherit; }

.container-main {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  width: 100%;
}

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  max-width: 1180px;
  height: 72px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.2;
  gap: 2px;
}

.brand-main {
  font-size: 22px;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: .6px;
}

.brand-sub {
  font-size: 12px;
  color: var(--c-muted);
  letter-spacing: .2px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.header-nav .nav-link {
  position: relative;
  font-size: 15px;
  line-height: 1.4;
  color: var(--c-muted);
  transition: color .25s ease;
  white-space: nowrap;
  padding: 6px 0;
}

.header-nav .nav-link:hover,
.header-nav .nav-link:focus-visible,
.header-nav .nav-link.active {
  color: var(--c-primary);
}

.header-nav .nav-link.active::after {
  content: "";
  position: absolute;
  left: calc(50% - 10px);
  bottom: -4px;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-accent);
}

.header-toggle {
  display: none;
  border: 0;
  background: transparent;
  color: var(--c-primary);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.header-toggle:hover {
  background: var(--c-surface-soft);
}

/* ===== page banner ===== */
.page-banner {
  position: relative;
  padding: 58px 0 66px;
  background-color: var(--c-primary-dark);
  background-image: linear-gradient(rgba(8, 29, 40, .72), rgba(8, 29, 40, .76)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  color: #fff;
}

.page-banner .container-main {
  position: relative;
  z-index: 1;
}

.breadcrumb-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.82);
  margin-bottom: 28px;
}

.breadcrumb-nav a {
  color: rgba(255,255,255,.8);
  border-bottom: 1px solid rgba(255,255,255,.3);
  transition: color .25s ease, border-color .25s ease;
}

.breadcrumb-nav a:hover {
  color: #fff;
  border-color: #fff;
}

.breadcrumb-nav .current {
  color: rgba(255,255,255,.96);
}

.breadcrumb-nav .sep {
  color: rgba(255,255,255,.5);
}

.page-kicker {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .4px;
  color: var(--c-accent-light);
  text-transform: none;
}

.page-title {
  margin: 0 0 14px;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .4px;
  max-width: 760px;
}

.page-lead {
  max-width: 780px;
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255,255,255,.9);
}

.banner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ===== buttons ===== */
.btn-app {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
  text-align: center;
}

.btn-app svg {
  width: 18px;
  height: 18px;
}

.btn-accent {
  background: var(--c-accent);
  color: #fff;
}

.btn-accent:hover,
.btn-accent:focus-visible {
  background: var(--c-accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 24px rgba(196,100,40,.16);
}

.btn-outline-light {
  border-color: rgba(255,255,255,.8);
  color: #fff;
  background: transparent;
}

.btn-outline-light:hover,
.btn-outline-light:focus-visible {
  background: rgba(255,255,255,.95);
  color: var(--c-primary-dark);
  transform: translateY(-2px);
}

.btn-outline-primary {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: transparent;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus-visible {
  background: var(--c-primary-light);
  color: var(--c-primary);
  transform: translateY(-2px);
}

/* ===== sections ===== */
.section-space {
  padding: clamp(64px, 9vw, 108px) 0;
}

.section-white {
  background: var(--c-surface);
}

.section-soft {
  background: var(--c-surface-soft);
}

.section-head {
  max-width: 760px;
  margin-bottom: 40px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .5px;
  color: var(--c-accent-dark);
  background: var(--c-accent-light);
  border-radius: var(--radius-pill);
  padding: 5px 14px;
  margin-bottom: 14px;
}

.section-title {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.3;
  color: var(--c-text);
  font-weight: 800;
}

.section-desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ===== overview ===== */
.overview-grid {
  display: grid;
  grid-template-columns: 1.18fr .82fr;
  align-items: center;
  gap: 52px;
}

.overview-copy p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-text);
}

.plain-check {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.plain-check li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--c-text);
  font-size: 15px;
  line-height: 1.7;
}

.plain-check svg {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  color: var(--c-accent-dark);
}

.overview-media {
  position: relative;
}

.visual-card {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--border-light);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
}

.visual-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.visual-card img {
  width: 100%;
  height: 330px;
  object-fit: cover;
}

.visual-card-body {
  padding: 22px 24px 24px;
}

.visual-card-body strong {
  display: block;
  color: var(--c-primary);
  font-size: 17px;
  margin-bottom: 4px;
}

.visual-card-body span {
  display: block;
  color: var(--c-muted);
  font-size: 14px;
}

/* ===== value cards ===== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  height: 100%;
  background: var(--c-white);
  border-radius: var(--radius-lg);
  border: var(--border-light);
  box-shadow: var(--shadow-card);
  padding: 30px 26px;
  transition: transform .3s ease, box-shadow .3s ease;
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--c-primary);
  background: var(--c-primary-light);
  margin-bottom: 20px;
}

.icon-badge.accent {
  color: var(--c-accent-dark);
  background: var(--c-accent-light);
}

.icon-badge svg {
  width: 24px;
  height: 24px;
}

.value-card h3 {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-text);
  margin: 0 0 10px;
}

.value-card p {
  margin: 0;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.value-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 16px;
  color: var(--c-primary);
  font-size: 14px;
  font-weight: 600;
  transition: gap .25s ease, color .25s ease;
}

.value-link:hover {
  color: var(--c-accent-dark);
  gap: 9px;
}

/* ===== steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step-item {
  position: relative;
  height: 100%;
  background: var(--c-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 30px 24px 28px;
  transition: transform .3s ease, box-shadow .3s ease;
}

.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 17px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--c-primary);
  background: var(--c-primary-light);
  margin-bottom: 20px;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 8px;
}

.step-item p {
  margin: 0;
  font-size: 14px;
  color: var(--c-muted);
  line-height: 1.8;
}

/* ===== scenario cards ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  height: 100%;
  background: var(--c-white);
  border-radius: var(--radius-lg);
  border: var(--border-light);
  box-shadow: var(--shadow-card);
  padding: 26px 24px;
  transition: box-shadow .3s ease, transform .3s ease;
}

.scenario-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.scenario-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 10px;
}

.scenario-card p {
  margin: 0;
  font-size: 14px;
  color: var(--c-muted);
  line-height: 1.85;
}

/* ===== faq ===== */
.faq-wrap {
  max-width: 880px;
  margin: 0 auto;
}

.faq-wrap .accordion-item {
  background: var(--c-white);
  border: var(--border-light);
  border-radius: var(--radius-md) !important;
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(18, 58, 78, .04);
}

.faq-wrap .accordion-button {
  width: 100%;
  border: 0;
  background: var(--c-white);
  color: var(--c-text);
  font-size: 16px;
  font-weight: 600;
  padding: 20px 24px;
  text-align: left;
  position: relative;
  border-radius: 0;
  box-shadow: none;
  transition: color .25s ease, background .25s ease;
}

.faq-wrap .accordion-button:hover,
.faq-wrap .accordion-button:not(.collapsed) {
  color: var(--c-primary);
  background: var(--c-surface-soft);
  box-shadow: none;
}

.faq-wrap .accordion-button::after {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B5C74' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  transition: transform .3s ease;
  margin-left: auto;
}

.faq-wrap .accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B5C74' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
  transform: none;
}

.faq-wrap .accordion-body {
  padding: 4px 24px 24px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.85;
  border-top: 1px solid var(--c-line);
}

/* ===== CTA band ===== */
.cta-band {
  background: var(--c-primary-dark);
  color: #fff;
  padding: clamp(56px, 8vw, 86px) 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-content {
  max-width: 640px;
}

.cta-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-accent-light);
  letter-spacing: .4px;
  margin-bottom: 10px;
}

.cta-content h2 {
  margin: 0 0 12px;
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.35;
  font-weight: 800;
}

.cta-content p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255,255,255,.82);
}

.cta-action {
  flex: 0 0 auto;
}

/* ===== footer ===== */
.site-footer {
  background: var(--c-primary-dark);
  color: #D4E2EA;
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.3;
  gap: 2px;
  margin-bottom: 18px;
}

.footer-brand-main {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
}

.footer-brand-sub {
  font-size: 12px;
  color: rgba(255,255,255,.62);
}

.footer-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255,255,255,.72);
  max-width: 280px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.72);
  transition: color .25s ease, padding-left .25s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  margin-top: 56px;
  border-top: 1px solid rgba(255,255,255,.15);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy {
  margin: 0;
  color: rgba(255,255,255,.88);
  font-size: 14px;
  font-weight: 600;
}

.footer-domain {
  margin: 0;
  color: var(--c-accent-light);
  font-size: 13px;
}

/* ===== responsive ===== */
@media (max-width: 1199.98px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991.98px) {
  .header-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--c-white);
    border-bottom: 1px solid var(--c-line);
    padding: 12px 24px 20px;
    box-shadow: 0 16px 28px rgba(18, 58, 78, .08);
    z-index: 1029;
  }

  .header-nav.open {
    display: flex;
  }

  .header-nav .nav-link {
    font-size: 18px;
    padding: 13px 14px;
    border-radius: var(--radius-md);
    color: var(--c-text);
  }

  .header-nav .nav-link.active {
    background: var(--c-surface-soft);
    color: var(--c-primary);
    border-left: 3px solid var(--c-accent);
  }

  .header-nav .nav-link.active::after {
    display: none;
  }

  .header-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .overview-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .overview-media {
    max-width: 620px;
  }

  .value-grid,
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 767.98px) {
  .page-banner {
    padding-top: 48px;
    padding-bottom: 54px;
  }

  .container-main,
  .header-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

  .value-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 575.98px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .banner-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .banner-actions .btn-app {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .visual-card img {
    height: auto;
    max-height: 240px;
  }

  .step-item {
    padding: 24px 20px;
  }

  .faq-wrap .accordion-button {
    padding: 17px 18px;
    font-size: 15px;
  }

  .faq-wrap .accordion-body {
    padding: 4px 18px 20px;
  }

  .page-lead {
    font-size: 16px;
  }
}

/* roulang page: category2 */
:root {
            --c-canvas: #F2F6F9;
            --c-surface: #FFFFFF;
            --c-surface-soft: #EAF1F6;
            --c-primary: #1B5C74;
            --c-primary-dark: #0F3B4C;
            --c-primary-light: #DDEBF2;
            --c-accent: #DE7C3A;
            --c-accent-dark: #C46428;
            --c-accent-light: #F9E6DA;
            --c-text: #1B2A33;
            --c-muted: #5A7380;
            --c-line: #DCE8EE;
            --c-white: #FFFFFF;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow-card: 0 14px 30px rgba(18, 58, 78, 0.08);
            --shadow-hover: 0 20px 40px rgba(18, 58, 78, 0.12);
            --border-light: 1px solid var(--c-line);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
            --space-section: clamp(64px, 9vw, 110px);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--c-text);
            background: var(--c-canvas);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--c-primary);
            text-decoration: none;
            transition: color .25s ease, background .25s ease, border-color .25s ease;
        }

        a:hover {
            color: var(--c-accent-dark);
        }

        button,
        input,
        textarea {
            font-family: inherit;
        }

        .container-main {
            max-width: 1180px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1045;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid rgba(220, 232, 238, 0.9);
            backdrop-filter: blur(6px);
        }

        .header-inner {
            max-width: 1180px;
            margin: 0 auto;
            min-height: 72px;
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand-logo {
            display: inline-flex;
            flex-direction: column;
            line-height: 1.15;
            gap: 2px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 24px;
            font-weight: 800;
            color: var(--c-primary-dark);
            letter-spacing: 0.02em;
        }

        .brand-sub {
            font-size: 12px;
            font-weight: 400;
            color: var(--c-muted);
            letter-spacing: 0.16em;
        }

        .brand-logo:hover .brand-main {
            color: var(--c-primary);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 34px;
            flex-wrap: wrap;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 10px 0 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-muted);
            border: 0;
            background: transparent;
        }

        .nav-link:hover,
        .nav-link:focus-visible {
            color: var(--c-primary);
            outline: none;
        }

        .nav-link.active {
            color: var(--c-primary);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 20px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }

        .nav-link:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 6px;
            border-radius: var(--radius-sm);
        }

        .header-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: var(--c-primary-light);
            border: 0;
            border-radius: 50%;
            color: var(--c-primary);
            cursor: pointer;
        }

        .header-toggle:hover {
            background: var(--c-primary);
            color: var(--c-white);
        }

        .header-toggle:focus-visible {
            outline: 3px solid var(--c-accent);
            outline-offset: 2px;
        }

        .main-wrap {
            min-height: calc(100vh - 360px);
        }

        .section-gap {
            padding-top: clamp(60px, 8vw, 96px);
            padding-bottom: clamp(60px, 8vw, 96px);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .08em;
            color: var(--c-accent-dark);
            background: var(--c-accent-light);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
        }

        .section-heading {
            margin: 0 0 16px;
            font-size: clamp(26px, 3.6vw, 36px);
            line-height: 1.3;
            font-weight: 700;
            color: var(--c-primary-dark);
        }

        .section-lead {
            font-size: 16px;
            color: var(--c-muted);
            max-width: 760px;
            margin-bottom: 0;
        }

        /* Page intro */
        .page-intro {
            background: var(--c-white);
            border-bottom: 1px solid var(--c-line);
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: clamp(30px, 5vw, 68px);
            align-items: center;
        }

        .intro-copy {
            padding: 18px 0;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 18px;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            background: var(--c-surface-soft);
            border: 1px solid rgba(27, 92, 116, 0.14);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .04em;
        }

        .eyebrow::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--c-accent);
        }

        h1 {
            font-size: clamp(32px, 5vw, 52px);
            line-height: 1.25;
            font-weight: 800;
            color: var(--c-primary-dark);
            margin: 0 0 20px;
            letter-spacing: -0.01em;
        }

        .intro-lead {
            font-size: 17px;
            line-height: 1.9;
            color: var(--c-muted);
            margin-bottom: 28px;
        }

        .intro-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 30px;
        }

        .chip-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 15px;
            background: var(--c-canvas);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-pill);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
        }

        .btn-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 1px solid transparent;
            background: var(--c-accent);
            color: #fff;
            cursor: pointer;
            transition: background .25s ease, box-shadow .25s ease, transform .25s ease, color .25s ease;
        }

        .btn-main:hover {
            background: var(--c-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(222, 124, 58, .22);
        }

        .btn-main:focus-visible,
        .btn-outline:focus-visible,
        .btn-ghost:focus-visible {
            outline: 3px solid var(--c-accent);
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            background: transparent;
            color: var(--c-primary);
            border: 1px solid var(--c-primary);
            transition: background .25s ease, color .25s ease, transform .25s ease;
        }

        .btn-outline:hover {
            background: var(--c-primary-light);
            color: var(--c-primary-dark);
            transform: translateY(-2px);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 4px;
            background: transparent;
            border: 0;
            color: var(--c-primary);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
        }

        .btn-ghost svg {
            transition: transform .25s ease;
        }

        .btn-ghost:hover svg {
            transform: translateX(4px);
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .intro-visual {
            position: relative;
        }

        .intro-visual .visual-frame {
            position: relative;
            background: var(--c-surface-soft);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-lg);
            padding: 10px;
            box-shadow: var(--shadow-card);
        }

        .intro-visual img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 14px;
        }

        .visual-note {
            position: absolute;
            right: 28px;
            bottom: 28px;
            left: 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            background: rgba(15, 59, 76, 0.88);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 18px 22px;
            line-height: 1.5;
            font-size: 14px;
            backdrop-filter: blur(4px);
        }

        .visual-note strong {
            display: block;
            color: #fff;
            font-size: 16px;
        }

        /* Steps section */
        .steps-panel {
            background: var(--c-canvas);
        }

        .section-head-row {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 44px;
        }

        .section-head-row .section-heading {
            margin-bottom: 6px;
        }

        .step-list {
            list-style: none;
            margin: 0;
            padding: 0;
            position: relative;
        }

        .step-list::before {
            content: "";
            position: absolute;
            left: 39px;
            top: 28px;
            bottom: 22px;
            width: 2px;
            background: linear-gradient(180deg, rgba(27, 92, 116, 0.32), rgba(222, 124, 58, 0.24));
        }

        .step-item {
            position: relative;
            display: flex;
            gap: 26px;
            margin-bottom: 38px;
        }

        .step-item:last-child {
            margin-bottom: 0;
        }

        .step-number {
            position: relative;
            z-index: 2;
            flex: 0 0 80px;
            width: 80px;
            height: 80px;
            background: var(--c-white);
            border: 1px solid rgba(27, 92, 116, 0.12);
            border-radius: 26px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            color: var(--c-primary);
            box-shadow: var(--shadow-card);
            font-variant-numeric: tabular-nums;
        }

        .step-content {
            background: var(--c-white);
            border: 1px solid rgba(220, 232, 238, 0.8);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 28px 32px;
            flex: 1;
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .step-content:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .step-content h3 {
            margin: 0 0 8px;
            font-size: 21px;
            font-weight: 700;
            color: var(--c-primary-dark);
        }

        .step-content p {
            margin: 0;
            color: var(--c-muted);
            font-size: 16px;
            line-height: 1.8;
        }

        .step-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--c-accent-dark);
            background: var(--c-accent-light);
            border-radius: var(--radius-pill);
            padding: 4px 12px;
            margin-bottom: 12px;
        }

        .step-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-primary);
        }

        .step-link svg {
            transition: transform .2s ease;
        }

        .step-link:hover svg {
            transform: translateX(4px);
        }

        /* Service overview */
        .overview-panel {
            background: var(--c-white);
        }

        .overview-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .overview-card {
            background: var(--c-canvas);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-lg);
            padding: 30px 28px;
            transition: background .25s ease, box-shadow .25s ease, transform .25s ease;
        }

        .overview-card:hover {
            background: var(--c-white);
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
            border-color: rgba(27, 92, 116, 0.14);
        }

        .overview-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--c-primary);
            background: var(--c-surface-soft);
            border: 1px solid rgba(27, 92, 116, 0.12);
            margin-bottom: 22px;
        }

        .overview-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-primary-dark);
            margin: 0 0 8px;
        }

        .overview-card p {
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.75;
            margin: 0;
        }

        /* Visual explain area */
        .explain-panel {
            background: var(--c-surface-soft);
        }

        .explain-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: clamp(30px, 5vw, 66px);
            align-items: center;
        }

        .explain-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            background: var(--c-white);
            height: 100%;
            min-height: 420px;
        }

        .explain-image img {
            width: 100%;
            height: 100%;
            min-height: 420px;
            object-fit: cover;
        }

        .explain-copy h2 {
            font-size: clamp(24px, 3.6vw, 36px);
            color: var(--c-primary-dark);
            margin-bottom: 16px;
            line-height: 1.3;
            font-weight: 700;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
        }

        .feature-list li {
            position: relative;
            padding: 10px 0 10px 36px;
            color: var(--c-text);
            border-bottom: 1px dashed var(--c-line);
        }

        .feature-list li:last-child {
            border-bottom: 0;
        }

        .feature-list li::before {
            content: "";
            position: absolute;
            left: 4px;
            top: 20px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: 2px solid var(--c-accent);
            background: var(--c-white);
        }

        .feature-list strong {
            color: var(--c-primary-dark);
        }

        .callout {
            margin-top: 24px;
            background: var(--c-white);
            border-left: 4px solid var(--c-primary);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 20px 22px;
            font-size: 15px;
            color: var(--c-muted);
        }

        /* In-page quick info */
        .quick-panel {
            background: var(--c-white);
        }

        .quick-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .quick-card {
            background: var(--c-canvas);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
        }

        .quick-card strong {
            display: block;
            font-size: 18px;
            color: var(--c-primary-dark);
            margin-bottom: 6px;
        }

        .quick-card span {
            color: var(--c-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-panel {
            background: var(--c-canvas);
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-panel .accordion-item {
            background: var(--c-white);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-lg) !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .faq-panel .accordion-button {
            background: var(--c-white);
            color: var(--c-primary-dark);
            font-size: 17px;
            font-weight: 600;
            padding: 20px 24px;
            line-height: 1.6;
            border: 0;
            box-shadow: none;
        }

        .faq-panel .accordion-button:not(.collapsed) {
            color: var(--c-primary-dark);
            background: var(--c-white);
            box-shadow: none;
        }

        .faq-panel .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--c-accent);
            outline-offset: -2px;
        }

        .faq-panel .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%231B5C74' stroke-width='2' stroke-linecap='round' viewBox='0 0 24 24'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
            background-size: 20px;
            width: 20px;
            height: 20px;
        }

        .faq-panel .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%231B5C74' stroke-width='2' stroke-linecap='round' viewBox='0 0 24 24'%3E%3Cpath d='M5 12h14'/%3E%3C/svg%3E");
            transform: none;
        }

        .faq-panel .accordion-body {
            padding: 0 26px 24px;
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.85;
        }

        /* Contact / CTA */
        .contact-panel {
            background: var(--c-white);
            border-bottom: 1px solid var(--c-line);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(30px, 5vw, 60px);
            align-items: center;
        }

        .contact-copy h2 {
            color: var(--c-primary-dark);
            font-size: clamp(25px, 3.6vw, 36px);
            line-height: 1.3;
            margin-bottom: 12px;
            font-weight: 700;
        }

        .contact-copy p {
            color: var(--c-muted);
            font-size: 16px;
        }

        .contact-list {
            list-style: none;
            margin: 22px 0 0;
            padding: 0;
        }

        .contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 6px 0;
            color: var(--c-text);
            font-size: 15px;
        }

        .contact-list li svg {
            flex: 0 0 auto;
            color: var(--c-accent);
        }

        .contact-form-panel {
            background: var(--c-canvas);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-card);
        }

        .contact-form-panel label {
            font-size: 14px;
            font-weight: 600;
            color: var(--c-primary-dark);
            margin-bottom: 6px;
        }

        .contact-form-panel .form-control {
            border: 1px solid var(--c-line);
            border-radius: var(--radius-md);
            padding: 11px 14px;
            color: var(--c-text);
            background: var(--c-white);
            font-size: 15px;
            margin-bottom: 16px;
            box-shadow: none;
        }

        .contact-form-panel .form-control:focus {
            border-color: var(--c-primary);
            background: var(--c-white);
            box-shadow: 0 0 0 3px rgba(27, 92, 116, 0.12);
        }

        .contact-form-panel textarea.form-control {
            min-height: 96px;
        }

        .form-hint {
            font-size: 13px;
            color: var(--c-muted);
            margin-top: 4px;
        }

        /* Footer */
        .site-footer {
            background: var(--c-primary-dark);
            color: #D5E6ED;
        }

        .footer-main {
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 42px;
        }

        .footer-brand {
            display: inline-flex;
            flex-direction: column;
            margin-bottom: 14px;
            line-height: 1.2;
        }

        .footer-brand-main {
            font-size: 25px;
            font-weight: 800;
            color: #fff;
        }

        .footer-brand-sub {
            font-size: 13px;
            color: #AFCAD6;
            letter-spacing: .12em;
        }

        .footer-desc {
            color: #AFCAD6;
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            max-width: 260px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: #AFCAD6;
            font-size: 14px;
            text-decoration: none;
        }

        .footer-links a:hover {
            color: #F1F8FB;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-copy {
            margin: 0;
            font-size: 13px;
            color: #C6DDE7;
        }

        .footer-domain {
            margin: 0;
            font-size: 13px;
            color: #8FAEBC;
        }

        .footer-links a:focus-visible,
        .footer-brand:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        @media (max-width: 1100px) {
            .overview-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .quick-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 992px) {
            .header-nav {
                gap: 20px;
            }

            .nav-link {
                font-size: 14px;
            }

            .intro-grid,
            .explain-grid,
            .contact-grid {
                grid-template-columns: 1fr;
            }

            .intro-visual {
                order: -1;
            }

            .intro-visual img {
                height: 260px;
            }

            .explain-image {
                min-height: 320px;
            }

            .explain-image img {
                min-height: 320px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                min-height: 64px;
                padding: 8px 18px;
                flex-wrap: nowrap;
            }

            .header-nav {
                position: fixed;
                inset: 64px 0 auto 0;
                background: #F7FAFC;
                border-bottom: 1px solid var(--c-line);
                display: none;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                padding: 16px 22px 26px;
                box-shadow: 0 22px 36px rgba(15, 59, 76, .16);
                max-height: calc(100vh - 80px);
                overflow: auto;
            }

            .header-nav.open {
                display: flex;
            }

            .nav-link {
                width: 100%;
                padding: 12px 8px;
                font-size: 16px;
                border-left: 3px solid transparent;
                border-radius: 0;
                color: var(--c-text);
            }

            .nav-link.active {
                border-left-color: var(--c-accent);
                background: var(--c-primary-light);
                color: var(--c-primary);
            }

            .nav-link.active::after,
            .nav-link.active::before {
                display: none;
            }

            .header-toggle {
                display: inline-flex;
                margin-left: auto;
            }

            .container-main {
                padding-left: 18px;
                padding-right: 18px;
            }

            .brand-main {
                font-size: 22px;
            }

            .brand-sub {
                font-size: 11px;
            }

            h1 {
                font-size: 32px;
            }

            .intro-chips {
                gap: 8px;
            }

            .hero-actions {
                align-items: stretch;
                flex-direction: column;
            }

            .hero-actions .btn-main,
            .hero-actions .btn-outline {
                justify-content: center;
            }

            .visual-note {
                position: static;
                margin-top: 12px;
                border-radius: var(--radius-md);
            }

            .step-list::before {
                left: 28px;
            }

            .step-item {
                gap: 16px;
            }

            .step-number {
                flex: 0 0 58px;
                width: 58px;
                height: 58px;
                font-size: 18px;
                border-radius: 20px;
            }

            .step-content {
                padding: 22px 20px;
            }

            .step-content h3 {
                font-size: 18px;
            }

            .overview-grid,
            .quick-grid {
                grid-template-columns: 1fr;
            }

            .contact-form-panel {
                padding: 24px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 26px;
            }
        }

        @media (max-width: 520px) {
            .brand-main {
                font-size: 20px;
            }

            .brand-sub {
                letter-spacing: .08em;
            }

            .header-inner {
                padding: 8px 14px;
            }

            h1 {
                font-size: 30px;
            }

            .section-heading {
                font-size: 26px;
            }

            .step-content p {
                font-size: 15px;
            }

            .step-item {
                gap: 12px;
            }

            .step-content {
                padding: 18px 16px;
            }

            .overview-grid {
                grid-template-columns: 1fr;
            }

            .quick-grid {
                grid-template-columns: 1fr;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category3 */
:root {
            --c-canvas: #F2F6F9;
            --c-surface: #FFFFFF;
            --c-surface-soft: #EAF1F6;
            --c-primary: #1B5C74;
            --c-primary-dark: #0F3B4C;
            --c-primary-light: #DDEBF2;
            --c-accent: #DE7C3A;
            --c-accent-dark: #C46428;
            --c-accent-light: #F9E6DA;
            --c-text: #1B2A33;
            --c-muted: #5A7380;
            --c-line: #DCE8EE;
            --c-white: #FFFFFF;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow-card: 0 14px 30px rgba(18, 58, 78, 0.08);
            --shadow-hover: 0 20px 40px rgba(18, 58, 78, 0.12);
            --border-light: 1px solid var(--c-line);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background-color: var(--c-canvas);
            color: var(--c-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            margin-top: 0;
            color: var(--c-text);
            font-weight: 800;
        }

        p {
            margin-top: 0;
        }

        a {
            color: var(--c-primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: var(--c-accent-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container-main {
            width: 100%;
            max-width: 1180px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding-top: clamp(64px, 9vw, 110px);
            padding-bottom: clamp(64px, 9vw, 110px);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 700;
            color: var(--c-primary);
            background: var(--c-primary-light);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .section-heading {
            font-size: clamp(24px, 3.6vw, 36px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--c-text);
            margin-bottom: 12px;
        }

        .section-lead {
            font-size: 16px;
            color: var(--c-muted);
            max-width: 760px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        .section-head-row {
            margin-bottom: 42px;
        }

        .text-accent {
            color: var(--c-accent);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid rgba(220, 232, 238, 0.7);
            backdrop-filter: none;
        }

        .site-header.is-scrolled {
            border-bottom-color: var(--c-line);
            box-shadow: 0 6px 24px rgba(18, 58, 78, 0.05);
        }

        .header-inner {
            max-width: 1180px;
            height: 72px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .brand-logo {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
            text-decoration: none;
            margin-right: 24px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 22px;
            font-weight: 900;
            color: var(--c-primary);
            letter-spacing: 1px;
        }

        .brand-sub {
            font-size: 12px;
            font-weight: 600;
            color: var(--c-accent);
            letter-spacing: 2px;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 8px 2px;
            font-size: 15px;
            font-weight: 600;
            color: var(--c-muted);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .nav-link:hover {
            color: var(--c-primary);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 0;
            width: 20px;
            height: 2px;
            border-radius: 4px;
            background: var(--c-accent);
            transform: translateX(-50%) scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
        }

        .nav-link.active {
            color: var(--c-primary);
        }

        .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-link:focus-visible {
            outline: 3px solid rgba(222, 124, 58, 0.55);
            outline-offset: 4px;
            border-radius: 6px;
        }

        a:focus-visible,
        button:focus-visible,
        .accordion-button:focus-visible {
            outline: 3px solid rgba(222, 124, 58, 0.55);
            outline-offset: 3px;
            border-radius: 6px;
        }

        .header-toggle {
            display: none;
            border: 0;
            background: transparent;
            color: var(--c-primary);
            padding: 8px;
            line-height: 1;
            cursor: pointer;
            border-radius: 8px;
        }

        .header-toggle:hover {
            background: var(--c-surface-soft);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-pill);
            padding: 12px 30px;
            font-size: 15px;
            font-weight: 700;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            line-height: 1.5;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary-custom {
            background: var(--c-accent);
            color: #fff;
            border-color: var(--c-accent);
        }

        .btn-primary-custom:hover {
            background: var(--c-accent-dark);
            border-color: var(--c-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(222, 124, 58, 0.25);
        }

        .btn-outline-primary {
            background: transparent;
            border-color: var(--c-primary);
            color: var(--c-primary);
        }

        .btn-outline-primary:hover {
            background: var(--c-primary-light);
            border-color: var(--c-primary);
            color: var(--c-primary-dark);
            transform: translateY(-2px);
        }

        .btn-light-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.72);
            color: #fff;
        }

        .btn-light-outline:hover {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border-color: #fff;
        }

        .btn:focus-visible,
        .accordion-button:focus-visible {
            box-shadow: 0 0 0 4px rgba(222, 124, 58, 0.18);
        }

        .text-link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 700;
            font-size: 14px;
            color: var(--c-primary);
            text-decoration: none;
        }

        .text-link-arrow svg {
            transition: transform 0.25s ease;
        }

        .text-link-arrow:hover svg {
            transform: translateX(4px);
        }

        /* Banner */
        .cat-banner {
            position: relative;
            background: linear-gradient(105deg, rgba(15, 59, 76, 0.94), rgba(27, 92, 116, 0.78)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 72px 0 76px;
            color: #fff;
            border-bottom: 4px solid rgba(255, 255, 255, 0.16);
        }

        .cat-banner::after {
            content: "";
            position: absolute;
            right: -120px;
            bottom: -80px;
            width: 340px;
            height: 240px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.11) 0%, transparent 68%);
        }

        .cat-banner .container-main {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.72);
            gap: 6px;
            margin-bottom: 24px;
            list-style: none;
            padding-left: 0;
        }

        .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.78);
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: all 0.2s ease;
        }

        .breadcrumb-custom a:hover {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, 0.55);
        }

        .breadcrumb-custom svg {
            width: 14px;
            height: 14px;
            opacity: 0.6;
        }

        .cat-banner .banner-title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 900;
            color: #fff;
            margin: 10px 0 16px;
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .banner-sub-lead {
            font-size: 17px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.88);
            max-width: 780px;
            margin-bottom: 0;
        }

        .banner-actions {
            margin-top: 30px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            font-weight: 700;
            color: #fff;
            background: rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
        }

        .banner-badge svg {
            width: 14px;
            height: 14px;
        }

        /* Cards */
        .content-card {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 0;
            padding: 28px;
            height: 100%;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 13px;
            background: var(--c-primary-light);
            color: var(--c-primary);
            margin-bottom: 18px;
        }

        .card-icon svg {
            width: 22px;
            height: 22px;
        }

        .content-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .content-card p {
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
        }

        /* Overview */
        .overview-section {
            background: var(--c-canvas);
        }

        /* Entrance compare */
        .entrance-compare-section {
            background: var(--c-white);
        }

        .entrance-grid .col {
            display: flex;
        }

        .entrance-card {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            border: var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            width: 100%;
            display: flex;
            flex-direction: column;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .entrance-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .media-frame {
            overflow: hidden;
        }

        .entrance-card .media-frame {
            aspect-ratio: 16 / 10;
        }

        .media-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .entrance-card:hover .media-frame img {
            transform: scale(1.035);
        }

        .entrance-card-body {
            padding: 26px 28px 30px;
            background: var(--c-surface);
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .entrance-card-body h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .entrance-card-body p {
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .entrance-tag {
            display: inline-flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }

        .entrance-tag span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--c-surface-soft);
            border-radius: var(--radius-pill);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 12px;
        }

        .entrance-tag svg {
            width: 13px;
            height: 13px;
        }

        .entrance-note {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            border-top: 1px solid var(--c-line);
            padding-top: 16px;
        }

        .entrance-note span {
            font-size: 13px;
            color: var(--c-muted);
        }

        /* Table / compare */
        .compare-table-section {
            background: var(--c-canvas);
        }

        .compare-info-card {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .table-compare {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 0;
            background: var(--c-surface);
        }

        .table-compare th,
        .table-compare td {
            border: 0;
            border-bottom: 1px solid var(--c-line);
            padding: 22px 24px;
            vertical-align: top;
            font-size: 15px;
            line-height: 1.8;
            color: var(--c-text);
        }

        .table-compare th {
            background: var(--c-primary-dark);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            line-height: 1.5;
        }

        .table-compare thead th:first-child {
            width: 170px;
            border-top-left-radius: var(--radius-lg);
        }

        .table-compare thead th:last-child {
            border-top-right-radius: var(--radius-lg);
        }

        .table-compare tbody tr:last-child td {
            border-bottom: 0;
        }

        .table-compare td:first-child {
            background: var(--c-surface-soft);
            font-weight: 700;
            color: var(--c-primary-dark);
            width: 170px;
        }

        .compare-mini-title {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--c-primary);
        }

        .compare-mini-title svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
        }

        .compare-note {
            font-size: 14px;
            color: var(--c-muted);
            margin-top: 18px;
        }

        /* feature scene */
        .read-features-section {
            background: var(--c-white);
        }

        .feature-card {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--c-line);
            padding: 30px 28px;
            height: 100%;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .feature-step {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--c-primary-light);
            color: var(--c-primary);
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* Tip band */
        .tip-band {
            background: var(--c-primary-dark);
            color: #fff;
        }

        .tip-band .section-label {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
        }

        .tip-band .section-heading {
            color: #fff;
        }

        .tip-band .section-lead {
            color: rgba(255, 255, 255, 0.72);
        }

        .tip-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .tip-list li {
            display: flex;
            gap: 14px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .tip-list li:last-child {
            border-bottom: 0;
        }

        .tip-icon {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.14);
            color: #F7C29B;
            margin-top: 4px;
        }

        .tip-icon svg {
            width: 16px;
            height: 16px;
        }

        .tip-list h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .tip-list p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-section {
            background: var(--c-canvas);
        }

        .accordion-faq .accordion-item {
            background: var(--c-surface);
            border: 0;
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            box-shadow: 0 4px 14px rgba(18, 58, 78, 0.04);
            overflow: hidden;
        }

        .accordion-faq .accordion-button {
            background: var(--c-surface);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            font-size: 16px;
            font-weight: 700;
            color: var(--c-text);
            box-shadow: none;
            line-height: 1.6;
            gap: 10px;
        }

        .accordion-faq .accordion-button:not(.collapsed) {
            color: var(--c-primary);
            background: var(--c-primary-light) !important;
        }

        .accordion-faq .accordion-button::after {
            display: none;
        }

        .accordion-state {
            margin-left: auto;
            width: 22px;
            height: 22px;
            position: relative;
            flex-shrink: 0;
        }

        .accordion-state::before,
        .accordion-state::after {
            content: "";
            position: absolute;
            background: var(--c-primary);
            border-radius: 4px;
            transition: transform 0.3s ease, opacity 0.2s ease;
        }

        .accordion-state::before {
            left: 50%;
            top: 4px;
            width: 2px;
            height: 14px;
            transform: translateX(-50%);
        }

        .accordion-state::after {
            left: 4px;
            top: 50%;
            width: 14px;
            height: 2px;
            transform: translateY(-50%);
        }

        .accordion-button:not(.collapsed) .accordion-state::before {
            transform: translateX(-50%) rotate(90deg);
            opacity: 0;
        }

        .accordion-button:not(.collapsed) .accordion-state::after {
            transform: translateY(-50%);
        }

        .accordion-faq .accordion-body {
            padding: 0 22px 20px;
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.85;
            background: var(--c-surface);
            border-bottom-left-radius: var(--radius-md);
            border-bottom-right-radius: var(--radius-md);
        }

        .accordion-faq .accordion-body p {
            padding-top: 4px;
            border-top: 1px dashed rgba(220, 232, 238, 0.9);
            margin-bottom: 0;
        }

        /* CTA */
        .cta-section {
            background: var(--c-surface);
        }

        .cta-panel {
            background: linear-gradient(118deg, var(--c-surface-soft), #fff 74%);
            border: 1px solid var(--c-line);
            border-radius: 22px;
            padding: clamp(30px, 5vw, 56px);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::after {
            content: "";
            position: absolute;
            right: -50px;
            top: -80px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(222, 124, 58, 0.10), transparent 70%);
        }

        .cta-panel h2 {
            font-size: 28px;
            font-weight: 900;
            margin-bottom: 10px;
        }

        .cta-panel p {
            color: var(--c-muted);
            margin-bottom: 28px;
            max-width: 620px;
            font-size: 15px;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--c-primary-dark);
            color: rgba(255, 255, 255, 0.82);
        }

        .footer-main {
            padding-top: 68px;
            padding-bottom: 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.7fr 1fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            margin-bottom: 12px;
            text-decoration: none;
            line-height: 1.2;
        }

        .footer-brand-main {
            font-size: 24px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 1px;
        }

        .footer-brand-sub {
            font-size: 13px;
            color: #F0B78E;
            font-weight: 600;
            letter-spacing: 2px;
            margin-top: 4px;
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.64);
            line-height: 1.9;
            max-width: 300px;
            margin-top: 10px;
        }

        .footer-grid h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.68);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 24px 0 30px;
            flex-wrap: wrap;
        }

        .footer-copy {
            color: rgba(255, 255, 255, 0.84);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 0;
        }

        .footer-domain {
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            margin-bottom: 0;
        }

        /* Bootstrap resets */
        .row {
            margin-left: -14px;
            margin-right: -14px;
        }

        .row > * {
            padding-left: 14px;
            padding-right: 14px;
        }

        .accordion-faq .accordion-button:focus {
            box-shadow: none;
        }

        /* Responsive */
        @media (max-width: 991px) {
            .header-nav {
                gap: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .footer-desc {
                max-width: 100%;
            }
        }

        @media (max-width: 767px) {
            .header-inner {
                height: 66px;
                padding: 0 18px;
            }

            .brand-main {
                font-size: 19px;
            }

            .brand-sub {
                font-size: 11px;
                letter-spacing: 1px;
            }

            .header-nav {
                position: fixed;
                top: 66px;
                left: 0;
                right: 0;
                z-index: 1030;
                display: block;
                background: var(--c-white);
                border-bottom: 1px solid var(--c-line);
                padding: 18px 22px 24px;
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                pointer-events: none;
                transition: all 0.24s ease;
                box-shadow: 0 18px 40px rgba(18, 58, 78, 0.12);
            }

            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
            }

            .header-nav .nav-link {
                display: block;
                font-size: 17px;
                padding: 14px 0;
                margin: 0;
                color: var(--c-text);
                border-left: 0;
            }

            .header-nav .nav-link::after {
                position: static;
                display: inline-block;
                margin-left: 8px;
                vertical-align: middle;
                transform: none;
                width: 16px;
                height: 2px;
            }

            .header-nav .nav-link.active::before {
                content: "";
                display: inline-block;
                width: 4px;
                height: 14px;
                background: var(--c-accent);
                border-radius: 4px;
                margin-right: 8px;
            }

            .header-nav .nav-link.active::after {
                transform: none;
            }

            .header-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .cat-banner {
                padding: 48px 0 52px;
            }

            .banner-sub-lead {
                font-size: 15px;
            }

            .breadcrumb-custom {
                margin-bottom: 18px;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .table-compare thead {
                display: none;
            }

            .table-compare,
            .table-compare tbody,
            .table-compare tr,
            .table-compare td {
                display: block;
                width: 100%;
            }

            .table-compare thead th,
            .table-compare td {
                padding: 16px 20px;
            }

            .table-compare tbody tr {
                display: block;
                border-bottom: 1px solid var(--c-line);
                padding: 6px 0;
            }

            .table-compare tbody tr:last-child {
                border-bottom: 0;
                padding-bottom: 4px;
            }

            .table-compare td {
                border-bottom: 0;
                padding: 10px 20px;
            }

            .table-compare td:first-child {
                background: var(--c-primary-light);
                font-weight: 800;
                color: var(--c-primary-dark);
            }

            .table-compare td:not(:first-child)::before {
                content: attr(data-label);
                display: block;
                font-size: 12px;
                font-weight: 700;
                color: var(--c-muted);
                letter-spacing: 0.04em;
                margin-bottom: 4px;
            }

            .table-compare tbody tr:first-child td:first-child {
                border-radius: 0;
            }

            .compare-info-card {
                border-radius: var(--radius-md);
            }

            .footer-main {
                padding-top: 48px;
            }

            .footer-bottom {
                padding-bottom: 24px;
            }

            .cta-panel {
                padding: 28px 24px;
            }
        }

        @media (max-width: 575px) {
            .section-head-row {
                margin-bottom: 30px;
            }

            .container-main {
                padding-left: 18px;
                padding-right: 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .entrance-card-body {
                padding: 22px 20px 24px;
            }

            .banner-title {
                font-size: 30px;
            }

            .banner-actions .btn {
                width: 100%;
            }
        }

/* roulang page: category4 */
/* ===== CSS设计变量 ===== */
        :root {
            --c-canvas: #F2F6F9;
            --c-surface: #FFFFFF;
            --c-surface-soft: #EAF1F6;
            --c-primary: #1B5C74;
            --c-primary-dark: #0F3B4C;
            --c-primary-light: #DDEBF2;
            --c-accent: #DE7C3A;
            --c-accent-dark: #C46428;
            --c-accent-light: #F9E6DA;
            --c-text: #1B2A33;
            --c-muted: #5A7380;
            --c-line: #DCE8EE;
            --c-white: #FFFFFF;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-pill: 999px;
            --shadow-card: 0 14px 30px rgba(18, 58, 78, 0.08);
            --shadow-hover: 0 20px 40px rgba(18, 58, 78, 0.12);
            --border-light: 1px solid var(--c-line);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
        }

        /* ===== Reset 与基础 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            background-color: var(--c-canvas);
            color: var(--c-text);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--c-primary);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--c-accent);
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input,
        textarea,
        select {
            font-family: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container-main {
            width: 100%;
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container-main {
                padding: 0 16px;
            }
        }

        /* ===== 顶部导航 site-header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1080;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid transparent;
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .site-header.scrolled {
            border-bottom: 1px solid var(--c-line);
            box-shadow: 0 6px 20px rgba(18, 58, 78, 0.05);
        }

        .header-inner {
            max-width: 1180px;
            margin: 0 auto;
            height: 72px;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            gap: 2px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 22px;
            font-weight: 700;
            color: var(--c-primary-dark);
            letter-spacing: 1px;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--c-muted);
            letter-spacing: 1.6px;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-muted);
            padding: 8px 2px;
            line-height: 1.2;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--c-primary);
        }

        .nav-link.active {
            color: var(--c-primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }

        .header-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            color: var(--c-primary);
            background: var(--c-surface-soft);
            transition: background .25s ease;
        }

        .header-toggle:hover {
            background: var(--c-primary-light);
        }

        @media (max-width: 991px) {
            .header-inner {
                padding: 0 16px;
            }

            .header-nav {
                position: fixed;
                top: 0;
                right: 0;
                bottom: 0;
                width: min(320px, 82vw);
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 80px 32px 40px;
                transform: translateX(100%);
                transition: transform .3s ease;
                box-shadow: -10px 0 40px rgba(18, 58, 78, 0.08);
                overflow-y: auto;
                z-index: 1200;
            }

            .header-nav.open {
                transform: translateX(0);
            }

            .header-nav .nav-link {
                font-size: 17px;
                padding: 16px 0;
                border-bottom: 1px solid var(--c-line);
                color: var(--c-text);
            }

            .header-nav .nav-link:hover {
                color: var(--c-primary);
            }

            .header-nav .nav-link.active::after {
                display: none;
            }

            .header-nav .nav-link.active {
                position: relative;
                padding-left: 14px;
                color: var(--c-primary);
                font-weight: 600;
            }

            .header-nav .nav-link.active::before {
                content: '';
                position: absolute;
                left: 0;
                top: 50%;
                transform: translateY(-50%);
                width: 3px;
                height: 20px;
                background: var(--c-accent);
                border-radius: 3px;
            }

            .header-toggle {
                display: flex;
            }
        }

        /* ===== 页脚 site-footer ===== */
        .site-footer {
            background: var(--c-primary-dark);
            color: rgba(221, 235, 242, 0.85);
            padding: 64px 0 0;
        }

        .footer-main {
            padding-bottom: 44px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 48px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
            gap: 4px;
            margin-bottom: 14px;
        }

        .footer-brand-main {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
        }

        .footer-brand-sub {
            font-size: 12px;
            color: rgba(221, 235, 242, 0.65);
            letter-spacing: 1.5px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(221, 235, 242, 0.68);
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(221, 235, 242, 0.7);
            transition: color .25s ease, padding-left .25s ease;
        }

        .footer-links a:hover {
            color: var(--c-accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(221, 235, 242, 0.14);
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-copy {
            font-size: 14px;
            color: rgba(221, 235, 242, 0.7);
        }

        .footer-domain {
            font-size: 13px;
            color: rgba(221, 235, 242, 0.48);
            font-variant-numeric: tabular-nums;
        }

        @media (max-width: 768px) {
            .site-footer {
                padding-top: 48px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }

            .footer-col:first-child {
                grid-column: 1 / -1;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 18px 0 28px;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== 分类页公共 Btn 与标签 ===== */
        .btn-custom-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--c-accent);
            color: #fff;
            border-radius: var(--radius-pill);
            padding: 12px 30px;
            font-size: 15px;
            font-weight: 600;
            border: 2px solid var(--c-accent);
            transition: all .25s ease;
            line-height: 1.4;
        }

        .btn-custom-primary:hover {
            background: var(--c-accent-dark);
            border-color: var(--c-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(222, 124, 58, 0.22);
        }

        .btn-custom-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--c-primary);
            border: 2px solid var(--c-primary);
            border-radius: var(--radius-pill);
            padding: 12px 30px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s ease;
            line-height: 1.4;
        }

        .btn-custom-outline:hover {
            background: var(--c-primary-light);
            color: var(--c-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(27, 92, 116, 0.08);
        }

        .badge-custom {
            display: inline-block;
            background: var(--c-primary-light);
            color: var(--c-primary);
            border-radius: var(--radius-pill);
            padding: 5px 16px;
            font-size: 13px;
            font-weight: 500;
        }

        .badge-accent-soft {
            display: inline-block;
            background: var(--c-accent-light);
            color: var(--c-accent-dark);
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
        }

        /* ===== 面包屑 Breadcrumb ===== */
        .breadcrumb-simple {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--c-muted);
            margin: 0 0 40px;
        }

        .breadcrumb-simple a {
            color: var(--c-muted);
            transition: color .25s ease;
        }

        .breadcrumb-simple a:hover {
            color: var(--c-primary);
        }

        .breadcrumb-simple .sep {
            color: rgba(90, 115, 128, 0.45);
        }

        .breadcrumb-simple .current {
            color: var(--c-text);
            font-weight: 500;
            max-width: 210px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 通用 Section 布局 ===== */
        .section-block {
            padding: clamp(64px, 9vw, 110px) 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.8px;
            color: var(--c-accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            width: 22px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(24px, 3.6vw, 36px);
            font-weight: 700;
            color: var(--c-text);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.2px;
        }

        .section-lead {
            font-size: 16px;
            color: var(--c-muted);
            line-height: 1.75;
            max-width: 640px;
        }

        /* ===== 分类页第四种骨架：图形化辅助页 ===== */
        /* 顶部标题区 */
        .support-hero {
            padding-top: 48px;
            padding-bottom: 0;
        }

        .support-hero-inner {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: var(--shadow-card);
            border: var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .support-hero-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, var(--c-primary-light) 0%, transparent 65%);
            pointer-events: none;
            border-radius: 50%;
        }

        .support-hero-content {
            position: relative;
            z-index: 1;
        }

        .support-hero-content h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--c-primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .support-hero-content .hero-tagline {
            font-size: 17px;
            color: var(--c-primary);
            font-weight: 500;
            margin-bottom: 22px;
        }

        .support-hero-content .hero-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--c-muted);
            margin-bottom: 28px;
            max-width: 500px;
        }

        .support-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .support-hero-visual {
            position: relative;
            z-index: 1;
        }

        .support-hero-visual .visual-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .support-hero-visual img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .visual-float-tip {
            position: absolute;
            bottom: 18px;
            left: -16px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            border: var(--border-light);
        }

        .visual-float-tip .dot {
            width: 8px;
            height: 8px;
            background: #1f9d6b;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .visual-float-tip .tip-text {
            font-size: 13px;
            color: var(--c-muted);
            white-space: nowrap;
        }

        @media (max-width: 992px) {
            .support-hero-inner {
                grid-template-columns: 1fr;
                padding: 32px;
                gap: 32px;
            }

            .support-hero-visual img {
                height: 260px;
            }
        }

        @media (max-width: 576px) {
            .support-hero-inner {
                padding: 24px;
            }

            .visual-float-tip {
                left: 12px;
                bottom: 12px;
            }
        }

        /* 快捷入口分类卡片区 */
        .quick-helper {
            background: transparent;
        }

        .helper-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 8px;
        }

        .helper-card {
            background: var(--c-surface);
            border-radius: var(--radius-lg);
            padding: 34px 28px;
            box-shadow: var(--shadow-card);
            border: var(--border-light);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .helper-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .helper-card-icon {
            width: 54px;
            height: 54px;
            background: var(--c-primary-light);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-primary);
            margin-bottom: 18px;
        }

        .helper-card-icon svg {
            width: 28px;
            height: 28px;
            stroke-width: 1.7;
        }

        .helper-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 8px;
        }

        .helper-card p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .helper-card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--c-primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap .25s ease;
        }

        .helper-card-link:hover {
            gap: 9px;
            color: var(--c-accent);
        }

        @media (max-width: 992px) {
            .helper-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .helper-cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* 深色阶段提示深色区块 */
        .phase-section {
            background: var(--c-primary-dark);
            border-radius: 0;
        }

        .phase-section .container-main {
            position: relative;
        }

        .phase-section .section-label {
            color: var(--c-accent);
        }

        .phase-section .section-label::before {
            background: var(--c-accent);
        }

        .phase-section .section-title {
            color: #fff;
        }

        .phase-section .section-lead {
            color: rgba(221, 235, 242, 0.75);
        }

        .phase-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .phase-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(221, 235, 242, 0.12);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            transition: background .3s ease, transform .25s ease;
            backdrop-filter: blur(4px);
        }

        .phase-card:hover {
            background: rgba(255, 255, 255, 0.09);
            transform: translateY(-4px);
        }

        .phase-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--c-accent);
            font-variant-numeric: tabular-nums;
            line-height: 1;
            margin-bottom: 16px;
        }

        .phase-card h3 {
            font-size: 17px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .phase-card p {
            font-size: 14px;
            color: rgba(221, 235, 242, 0.68);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .phase-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .phase-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 对比表格区 */
        .compare-wrap {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: var(--border-light);
            overflow: hidden;
            margin-top: 12px;
        }

        .compare-row {
            display: grid;
            grid-template-columns: 200px 1fr;
            border-bottom: 1px solid var(--c-line);
            padding: 22px 28px;
            transition: background .25s ease;
            gap: 24px;
            align-items: flex-start;
        }

        .compare-row:last-child {
            border-bottom: none;
        }

        .compare-row:hover {
            background: var(--c-canvas);
        }

        .compare-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--c-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-text {
            font-size: 15px;
            color: var(--c-muted);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .compare-row {
                grid-template-columns: 1fr;
                gap: 8px;
                padding: 20px;
            }
        }

        /* 两列图解卡片 */
        .dual-visual-section {
            background: var(--c-surface-soft);
        }

        .dual-care-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 8px;
        }

        .dual-care-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: var(--border-light);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .dual-care-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .dual-care-card .img-box {
            height: 220px;
            overflow: hidden;
        }

        .dual-care-card .img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .dual-care-card:hover .img-box img {
            transform: scale(1.03);
        }

        .dual-care-body {
            padding: 28px;
        }

        .dual-care-body .label {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--c-accent-dark);
            background: var(--c-accent-light);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            letter-spacing: 0.4px;
        }

        .dual-care-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 10px;
        }

        .dual-care-body p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .dual-care-step {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--c-muted);
            margin-bottom: 8px;
        }

        .dual-care-step svg {
            width: 16px;
            height: 16px;
            color: var(--c-accent);
            flex-shrink: 0;
        }

        @media (max-width: 992px) {
            .dual-care-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .dual-care-body {
                padding: 20px;
            }

            .dual-care-card .img-box {
                height: 180px;
            }
        }

        /* FAQ 折叠 */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-center-head {
            text-align: center;
            max-width: 100%;
            margin-bottom: 32px;
        }

        .faq-center-head .section-label {
            justify-content: center;
        }

        .faq-center-head .section-label::before {
            display: none;
        }

        .faq-accordion-item {
            background: #fff;
            border: var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .faq-accordion-item:hover {
            border-color: var(--c-primary-light);
        }

        .faq-question-btn {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            background: #fff;
            color: var(--c-text);
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            line-height: 1.5;
            transition: background .25s ease;
            gap: 16px;
        }

        .faq-question-btn:hover {
            background: #fafdff;
        }

        .faq-question-btn .faq-icon {
            position: relative;
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            border-radius: 50%;
            border: 1.5px solid var(--c-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: border-color .3s ease, transform .4s ease;
        }

        .faq-question-btn .faq-icon::before,
        .faq-question-btn .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--c-muted);
            border-radius: 2px;
            transition: background .3s ease;
        }

        .faq-question-btn .faq-icon::before {
            width: 10px;
            height: 1.5px;
        }

        .faq-question-btn .faq-icon::after {
            width: 1.5px;
            height: 10px;
            transition: opacity .3s ease;
        }

        .faq-accordion-item.open .faq-question-btn {
            background: #fafdff;
        }

        .faq-accordion-item.open .faq-icon {
            border-color: var(--c-accent);
            transform: rotate(180deg);
        }

        .faq-accordion-item.open .faq-icon::before,
        .faq-accordion-item.open .faq-icon::after {
            background: var(--c-accent);
        }

        .faq-accordion-item.open .faq-icon::after {
            opacity: 0;
        }

        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            font-size: 15px;
            color: var(--c-muted);
            line-height: 1.8;
            background: #fafdff;
        }

        @media (max-width: 576px) {
            .faq-question-btn {
                padding: 16px 16px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 16px 16px;
                font-size: 14px;
            }
        }

        /* CTA 联系面板 */
        .helper-cta-section {
            padding-top: 0;
        }

        .cta-soft-panel {
            background: #fff;
            border: var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            overflow: hidden;
            margin-top: 12px;
        }

        .cta-info-box {
            padding: 44px 40px;
            background: var(--c-primary-light);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .cta-info-box .section-label {
            margin-bottom: 8px;
            color: var(--c-primary);
        }

        .cta-info-box h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--c-primary-dark);
            line-height: 1.4;
            margin-bottom: 14px;
        }

        .cta-info-box p {
            font-size: 14px;
            color: var(--c-primary-dark);
            opacity: 0.8;
            margin-bottom: 10px;
        }

        .cta-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--c-primary-dark);
            margin-bottom: 8px;
        }

        .cta-contact-list svg {
            width: 16px;
            height: 16px;
            color: var(--c-accent);
            flex-shrink: 0;
        }

        .cta-form-box {
            padding: 44px 40px;
            background: #fff;
        }

        .cta-form-box h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--c-text);
            margin-bottom: 16px;
        }

        .cta-form-box label {
            font-size: 13px;
            font-weight: 500;
            color: var(--c-text);
            margin-bottom: 4px;
            display: block;
        }

        .cta-form-box .form-control {
            background: #fff;
            border: 1px solid var(--c-line);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 14px;
            color: var(--c-text);
            transition: border-color .25s ease, box-shadow .25s ease;
            margin-bottom: 14px;
        }

        .cta-form-box .form-control:focus {
            border-color: var(--c-primary);
            box-shadow: 0 0 0 4px rgba(27, 92, 116, 0.12);
            outline: none;
        }

        .cta-form-box textarea.form-control {
            resize: vertical;
            min-height: 76px;
        }

        @media (max-width: 992px) {
            .cta-soft-panel {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .cta-info-box,
            .cta-form-box {
                padding: 28px 20px;
            }
        }

        /* 通用 section 标题行 */
        .section-head-row {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 24px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }