/* roulang page: index */
:root {
        --primary: #3D6FE0;
        --primary-dark: #2F5AC8;
        --primary-light: #E8F0FE;
        --secondary: #0EAF96;
        --secondary-light: #E6F9F6;
        --bg-main: #F7FAFE;
        --bg-light-blue: #EEF4FB;
        --bg-card: #FFFFFF;
        --dark-bg: #14294A;
        --dark-bg-2: #16263F;
        --text-main: #24344D;
        --text-secondary: #60708A;
        --text-placeholder: #A6B4C8;
        --border-color: #E3EBF5;
        --accent: #F5B841;
        --shadow-sm: 0 2px 12px rgba(20, 41, 74, 0.06);
        --shadow-md: 0 8px 28px rgba(20, 41, 74, 0.10);
        --shadow-lg: 0 16px 48px rgba(20, 41, 74, 0.14);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --radius-xl: 24px;
        --radius-pill: 999px;
        --nav-height: 72px;
        --space-section: 96px;
        --transition: all 0.25s ease-out;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        background: var(--bg-main);
        color: var(--text-main);
        line-height: 1.75;
        font-size: 16px;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); }
    ul, ol { list-style: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
    section { position: relative; }

    /* Buttons */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        height: 44px;
        padding: 0 28px;
        border-radius: var(--radius-sm);
        font-size: 15px;
        font-weight: 500;
        border: 1px solid transparent;
        transition: var(--transition);
        cursor: pointer;
        line-height: 1;
        white-space: nowrap;
        gap: 8px;
    }
    .btn:focus-visible { outline: 3px solid rgba(61, 111, 224, 0.35); outline-offset: 2px; }
    .btn-primary { background: var(--primary); color: #fff; }
    .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
    .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
    .btn-secondary { background: #fff; color: var(--primary); border-color: var(--primary); }
    .btn-secondary:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); }
    .btn-secondary:active { transform: translateY(0); }
    .btn-white { background: #fff; color: var(--dark-bg); }
    .btn-white:hover { background: var(--bg-light-blue); color: var(--dark-bg); transform: translateY(-2px); box-shadow: var(--shadow-md); }
    .btn-sm { height: 36px; padding: 0 18px; font-size: 14px; border-radius: 6px; }
    .btn-lg { height: 52px; padding: 0 40px; font-size: 16px; border-radius: 10px; }
    .btn-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--primary);
        font-weight: 500;
        height: auto;
        padding: 4px 0;
        background: none;
        border: none;
    }
    .btn-link:hover { color: var(--primary-dark); gap: 10px; }
    .btn-link .arrow { transition: transform 0.25s ease; }
    .btn-link:hover .arrow { transform: translateX(4px); }

    /* Header Navigation */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        height: var(--nav-height);
        background: rgba(255, 255, 255, 0.55);
        backdrop-filter: blur(24px) saturate(1.3);
        -webkit-backdrop-filter: blur(24px) saturate(1.3);
        border-bottom: 1px solid rgba(255, 255, 255, 0.30);
        transition: all 0.35s ease;
    }
    .site-header.scrolled {
        background: rgba(255, 255, 255, 0.96);
        border-bottom-color: var(--border-color);
        box-shadow: 0 4px 20px rgba(20, 41, 74, 0.06);
    }
    .nav-container {
        max-width: 1200px;
        height: 100%;
        margin: 0 auto;
        padding: 0 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
        text-decoration: none;
    }
    .logo-mark {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--primary);
        border-radius: 10px;
        color: #fff;
        font-weight: 700;
        font-size: 18px;
        letter-spacing: -0.5px;
        box-shadow: 0 4px 12px rgba(61, 111, 224, 0.25);
    }
    .logo-text {
        font-size: 18px;
        font-weight: 600;
        color: var(--text-main);
        white-space: nowrap;
        letter-spacing: 0.2px;
    }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 4px;
        margin: 0;
        padding: 0;
    }
    .nav-menu li { margin: 0; }
    .nav-link {
        display: block;
        padding: 10px 16px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-main);
        border-radius: 6px;
        position: relative;
        transition: var(--transition);
    }
    .nav-link:hover { color: var(--primary); background: var(--primary-light); }
    .nav-link.active { color: var(--primary); }
    .nav-link.active::after {
        content: '';
        position: absolute;
        left: 16px;
        right: 16px;
        bottom: 4px;
        height: 2px;
        border-radius: 2px;
        background: var(--primary);
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-shrink: 0;
    }
    .hamburger {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 44px;
        height: 44px;
        padding: 10px;
        border-radius: 8px;
        background: transparent;
        transition: background 0.25s;
    }
    .hamburger:hover { background: var(--primary-light); }
    .hamburger span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--text-main);
        border-radius: 2px;
        transition: all 0.3s ease;
        margin: 0 auto;
    }
    .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger.open span:nth-child(2) { opacity: 0; }
    .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    /* Mobile Menu */
    .mobile-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: var(--shadow-md);
        padding: 16px 24px 24px;
        z-index: 99;
        display: none;
        border-bottom: 1px solid var(--border-color);
    }
    .mobile-menu.open { display: block; }
    .mobile-menu a {
        display: block;
        padding: 14px 12px;
        font-size: 17px;
        font-weight: 500;
        color: var(--text-main);
        border-bottom: 1px solid var(--border-color);
        border-radius: 0;
    }
    .mobile-menu a:last-child { border-bottom: none; }
    .mobile-menu a:hover { color: var(--primary); background: var(--bg-light-blue); }
    .mobile-menu a.active { color: var(--primary); }

    /* Hero */
    .hero {
        min-height: 100vh;
        display: flex;
        align-items: center;
        background: linear-gradient(135deg, #F0F6FF 0%, #E6EFFB 50%, #DDE9F8 100%);
        position: relative;
        overflow: hidden;
        padding-top: var(--nav-height);
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.18;
        z-index: 1;
    }
    .hero::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(247,250,254,0.96) 0%, rgba(240,246,255,0.88) 45%, rgba(230,239,251,0.65) 100%);
        z-index: 1;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 1200px;
        margin: 0 auto;
        width: 100%;
        padding: 80px 24px 100px;
    }
    .hero-badges {
        display: flex;
        gap: 10px;
        margin-bottom: 28px;
        flex-wrap: wrap;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        padding: 6px 16px;
        background: rgba(255,255,255,0.7);
        border: 1px solid rgba(255,255,255,0.75);
        border-radius: var(--radius-pill);
        font-size: 13px;
        font-weight: 500;
        color: var(--text-secondary);
        backdrop-filter: blur(8px);
        box-shadow: var(--shadow-sm);
    }
    .hero-badge::before {
        content: '';
        display: inline-block;
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--secondary);
        margin-right: 6px;
    }
    .hero h1 {
        font-size: 42px;
        line-height: 1.3;
        font-weight: 700;
        color: var(--text-main);
        max-width: 640px;
        margin: 0 0 20px;
        letter-spacing: -0.5px;
    }
    .hero-sub {
        font-size: 17px;
        line-height: 1.8;
        color: var(--text-secondary);
        max-width: 500px;
        margin-bottom: 36px;
    }
    .hero-buttons {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-stats-row {
        display: flex;
        gap: 32px;
        margin-top: 56px;
        flex-wrap: wrap;
    }
    .hero-stat-item {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 14px;
        color: var(--text-secondary);
    }
    .hero-stat-item svg { width: 20px; height: 20px; color: var(--secondary); flex-shrink: 0; }

    /* Section spacing */
    .section { padding: var(--space-section) 0; }
    .section-light { background: var(--bg-light-blue); }
    .section-white { background: #fff; }
    .section-dark { background: var(--dark-bg); }
    .section-head {
        max-width: 720px;
        margin: 0 auto 48px;
        text-align: center;
    }
    .section-head .eyebrow {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        color: var(--secondary);
        text-transform: uppercase;
        letter-spacing: 1px;
        margin-bottom: 12px;
    }
    .section-head h2 {
        font-size: 30px;
        line-height: 1.4;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 14px;
    }
    .section-head p {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.75;
    }

    /* Pain Points */
    .pain-section .grid-x { align-items: stretch; }
    .pain-left-content { padding-right: 48px; }
    .pain-left-content h2 {
        font-size: 30px;
        line-height: 1.4;
        font-weight: 700;
        margin-bottom: 16px;
        color: var(--text-main);
    }
    .pain-left-content p {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.75;
        margin-bottom: 24px;
    }
    .pain-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px 28px;
        height: 100%;
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
    }
    .pain-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
    }
    .pain-card .pain-icon {
        width: 44px;
        height: 44px;
        border-radius: 10px;
        background: var(--primary-light);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 16px;
    }
    .pain-card .pain-icon svg { width: 22px; height: 22px; color: var(--primary); }
    .pain-card h4 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text-main);
    }
    .pain-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
        margin-bottom: 0;
    }

    /* Solution */
    .solution-section { background: #fff; }
    .solution-media {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-md);
        height: 100%;
        min-height: 400px;
    }
    .solution-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .solution-media::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(20,41,74,0) 60%, rgba(20,41,74,0.35) 100%);
        border-radius: var(--radius-lg);
    }
    .solution-steps { padding-left: 20px; }
    .solution-step {
        display: flex;
        gap: 20px;
        padding: 24px 0;
        border-bottom: 1px solid var(--border-color);
    }
    .solution-step:last-child { border-bottom: none; }
    .step-num {
        font-size: 22px;
        font-weight: 700;
        color: var(--primary);
        font-feature-settings: "tnum";
        flex-shrink: 0;
        width: 48px;
        height: 48px;
        border-radius: 10px;
        background: var(--primary-light);
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .step-content h3 {
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text-main);
    }
    .step-content p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 0;
    }
    .solution-cta {
        margin-top: 24px;
        padding-left: 68px;
    }

    /* Results */
    .section-dark { background: var(--dark-bg); color: #fff; }
    .section-dark .section-head h2 { color: #fff; }
    .section-dark .section-head p { color: rgba(255,255,255,0.7); }
    .results-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
    .result-card {
        text-align: center;
        padding: 40px 24px;
        position: relative;
    }
    .result-card + .result-card::before {
        content: '';
        position: absolute;
        left: -16px;
        top: 50%;
        transform: translateY(-50%);
        width: 1px;
        height: 70%;
        background: rgba(255,255,255,0.15);
    }
    .result-number {
        font-size: 52px;
        font-weight: 700;
        color: #fff;
        line-height: 1.2;
        font-variant-numeric: tabular-nums;
        margin-bottom: 8px;
        letter-spacing: -1px;
    }
    .result-number span { color: var(--secondary); font-size: 24px; }
    .result-label {
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        line-height: 1.5;
    }
    .results-milestone {
        margin-top: 48px;
        height: 2px;
        background: rgba(255,255,255,0.12);
        border-radius: 2px;
        position: relative;
        overflow: hidden;
    }
    .results-milestone::after {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        width: 65%;
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        border-radius: 2px;
    }

    /* Testimonials */
    .testimonials-section { background: var(--bg-light-blue); }
    .testimonial-card {
        background: #fff;
        border-radius: var(--radius-md);
        padding: 28px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        height: 100%;
    }
    .testimonial-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
    .testimonial-card.featured {
        background: var(--dark-bg);
        border-color: var(--dark-bg);
        color: #fff;
        box-shadow: var(--shadow-lg);
    }
    .testimonial-card.featured .quote-icon { color: rgba(255,255,255,0.3); }
    .testimonial-card.featured .testimonial-text { color: rgba(255,255,255,0.9); }
    .testimonial-card.featured .testimonial-author { color: rgba(255,255,255,0.7); }
    .testimonial-card.featured .testimonial-name { color: #fff; }
    .quote-icon { font-size: 48px; line-height: 1; color: var(--primary-light); margin-bottom: 12px; font-family: Georgia, serif; }
    .testimonial-text {
        font-size: 15px;
        line-height: 1.75;
        color: var(--text-secondary);
        margin-bottom: 20px;
    }
    .testimonial-author { display: flex; align-items: center; gap: 12px; }
    .testimonial-avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 15px;
        font-weight: 600;
        flex-shrink: 0;
    }
    .testimonial-name { font-size: 15px; font-weight: 600; color: var(--text-main); }
    .testimonial-role { font-size: 13px; color: var(--text-placeholder); }

    /* News Section */
    .news-section { background: #fff; }
    .news-section .section-head { margin-bottom: 40px; }
    .news-layout {
        display: grid;
        grid-template-columns: 1.05fr 0.95fr;
        gap: 32px;
        align-items: start;
    }
    .news-card {
        display: block;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
        color: inherit;
    }
    .news-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
        color: inherit;
    }
    .news-card-featured .news-card-cover { position: relative; }
    .news-card-featured .news-card-cover img {
        width: 100%;
        height: 220px;
        object-fit: cover;
        transition: transform 0.3s ease;
    }
    .news-card-featured:hover .news-card-cover img { transform: scale(1.02); }
    .news-card-cover {
        position: relative;
        overflow: hidden;
        background: linear-gradient(135deg, var(--primary-light), var(--bg-light-blue));
    }
    .news-category-badge {
        position: absolute;
        top: 12px;
        left: 12px;
        z-index: 2;
        background: rgba(14, 175, 150, 0.92);
        color: #fff;
        font-size: 12px;
        font-weight: 500;
        padding: 4px 12px;
        border-radius: var(--radius-pill);
        backdrop-filter: blur(4px);
    }
    .news-card-body { padding: 24px 28px; }
    .news-card-featured .news-card-body h3 {
        font-size: 20px;
        font-weight: 600;
        line-height: 1.5;
        margin-bottom: 10px;
        color: var(--text-main);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card-featured .news-card-body p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 16px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-date { font-size: 13px; color: var(--text-placeholder); }
    .news-side { display: flex; flex-direction: column; gap: 20px; }
    .news-card-compact { display: flex; gap: 16px; padding: 16px 20px; }
    .news-card-compact .news-card-body { padding: 0; flex: 1; }
    .news-card-compact .news-card-body .news-category-badge {
        position: static;
        display: inline-block;
        background: var(--secondary-light);
        color: var(--secondary);
        font-size: 12px;
        padding: 3px 10px;
        border-radius: var(--radius-pill);
        margin-bottom: 8px;
        font-weight: 500;
    }
    .news-card-compact .news-card-body h3 {
        font-size: 16px;
        font-weight: 600;
        line-height: 1.5;
        margin-bottom: 6px;
        color: var(--text-main);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card-compact .news-card-body p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-empty {
        text-align: center;
        padding: 60px 40px;
        background: var(--bg-main);
        border: 1px dashed var(--border-color);
        border-radius: var(--radius-md);
    }
    .news-empty .empty-icon {
        width: 64px;
        height: 64px;
        margin: 0 auto 16px;
        background: var(--bg-light-blue);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .news-empty .empty-icon svg { width: 28px; height: 28px; color: var(--text-placeholder); }
    .news-empty p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; }

    /* FAQ */
    .faq-section { background: var(--bg-main); }
    .faq-container {
        max-width: 820px;
        margin: 0 auto;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }
    .faq-item { border-bottom: 1px solid var(--border-color); }
    .faq-item:last-child { border-bottom: none; }
    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 22px 28px;
        background: none;
        border: none;
        text-align: left;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-main);
        cursor: pointer;
        transition: var(--transition);
        font-family: inherit;
    }
    .faq-question:hover { color: var(--primary); }
    .faq-question.active { color: var(--primary); }
    .faq-icon {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        border: 2px solid var(--border-color);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
        font-size: 14px;
        color: var(--text-secondary);
    }
    .faq-question.active .faq-icon {
        border-color: var(--primary);
        color: var(--primary);
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
        padding: 0 28px;
    }
    .faq-answer.open { max-height: 400px; padding: 0 28px 22px; }
    .faq-answer p {
        font-size: 15px;
        line-height: 1.75;
        color: var(--text-secondary);
        margin: 0;
    }

    /* CTA */
    .cta-section { background: var(--bg-main); padding-bottom: var(--space-section); }
    .cta-container {
        background: linear-gradient(135deg, #E8F1FE 0%, #DCE8FB 50%, #E6F2F8 100%);
        border-radius: var(--radius-xl);
        padding: 64px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 48px;
        border: 1px solid rgba(255,255,255,0.6);
        box-shadow: var(--shadow-md);
        position: relative;
        overflow: hidden;
    }
    .cta-container::before {
        content: '';
        position: absolute;
        right: -80px;
        top: -80px;
        width: 240px;
        height: 240px;
        background: rgba(61, 111, 224, 0.08);
        border-radius: 50%;
    }
    .cta-content { position: relative; z-index: 2; max-width: 480px; }
    .cta-content h2 {
        font-size: 30px;
        line-height: 1.4;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 14px;
    }
    .cta-content p {
        font-size: 16px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 0;
    }
    .cta-actions { position: relative; z-index: 2; display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
    .cta-form {
        background: rgba(255,255,255,0.75);
        border-radius: var(--radius-md);
        padding: 20px;
        border: 1px solid rgba(255,255,255,0.8);
        backdrop-filter: blur(8px);
        min-width: 320px;
    }
    .cta-form .form-group { margin-bottom: 14px; }
    .cta-form .form-group:last-child { margin-bottom: 0; }
    .cta-form label {
        display: block;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-main);
        margin-bottom: 6px;
    }
    .cta-form .form-input {
        width: 100%;
        height: 42px;
        border: 1px solid #C9D6E8;
        border-radius: var(--radius-sm);
        padding: 0 14px;
        font-size: 14px;
        font-family: inherit;
        color: var(--text-main);
        background: #fff;
        transition: border-color 0.25s, box-shadow 0.25s;
    }
    .cta-form .form-input:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(61, 111, 224, 0.12);
    }
    .cta-form .form-textarea {
        width: 100%;
        min-height: 60px;
        border: 1px solid #C9D6E8;
        border-radius: var(--radius-sm);
        padding: 10px 14px;
        font-size: 14px;
        font-family: inherit;
        color: var(--text-main);
        resize: vertical;
        transition: border-color 0.25s, box-shadow 0.25s;
    }
    .cta-form .form-textarea:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(61, 111, 224, 0.12);
    }
    .form-success {
        display: none;
        background: var(--secondary-light);
        color: var(--secondary);
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        font-size: 14px;
        margin-top: 12px;
    }

    /* Footer */
    .site-footer { background: var(--dark-bg); color: rgba(255,255,255,0.8); }
    .footer-main {
        padding: 64px 0 40px;
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 48px;
    }
    .footer-brand .logo-text { color: #fff; }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.75;
        color: rgba(255,255,255,0.6);
        margin-top: 16px;
        max-width: 280px;
    }
    .footer-title {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 20px;
    }
    .footer-links { list-style: none; padding: 0; margin: 0; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a {
        font-size: 14px;
        color: rgba(255,255,255,0.6);
        text-decoration: none;
        transition: color 0.25s;
    }
    .footer-links a:hover { color: #AECBFF; }
    .footer-contact { list-style: none; padding: 0; margin: 0; }
    .footer-contact li {
        display: flex;
        gap: 10px;
        font-size: 14px;
        color: rgba(255,255,255,0.6);
        margin-bottom: 12px;
    }
    .footer-contact svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 3px; color: var(--secondary); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        padding: 24px 0 32px;
        display: flex;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 13px;
        color: rgba(255,255,255,0.45);
    }
    .footer-bottom a { color: rgba(255,255,255,0.6); }
    .footer-bottom a:hover { color: #AECBFF; }

    /* Utility */
    .text-center { text-align: center; }
    .mb-0 { margin-bottom: 0; }
    .mt-2 { margin-top: 8px; }
    .mt-4 { margin-top: 16px; }

    /* Responsive */
    @media (max-width: 1024px) {
        :root { --space-section: 72px; }
        .nav-menu { display: none; }
        .hamburger { display: flex; }
        .results-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .result-card + .result-card::before { display: none; }
        .news-layout { grid-template-columns: 1fr; }
        .hero h1 { font-size: 34px; }
        .cta-container { flex-direction: column; padding: 48px; text-align: center; }
        .cta-actions { align-items: center; }
    }
    @media (max-width: 768px) {
        :root { --space-section: 56px; --nav-height: 60px; }
        .container { padding: 0 16px; }
        .nav-container { padding: 0 16px; }
        .logo-text { font-size: 16px; }
        .logo-mark { width: 34px; height: 34px; font-size: 15px; }
        .hero { min-height: 85vh; padding-top: var(--nav-height); }
        .hero-content { padding: 48px 16px 64px; }
        .hero h1 { font-size: 30px; }
        .hero-sub { font-size: 16px; }
        .hero-buttons .btn { flex: 1; }
        .pain-left-content { padding-right: 0; margin-bottom: 32px; }
        .solution-steps { padding-left: 0; margin-top: 32px; }
        .solution-cta { padding-left: 0; }
        .results-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
        .result-number { font-size: 40px; }
        .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
        .cta-form { min-width: 100%; }
        .cta-container { padding: 32px 24px; }
        .faq-question { padding: 18px 20px; font-size: 15px; }
        .faq-answer { padding: 0 20px; }
        .faq-answer.open { padding: 0 20px 18px; }
    }
    @media (max-width: 520px) {
        body { font-size: 15px; }
        .hero h1 { font-size: 28px; }
        .hero-badges { gap: 6px; }
        .hero-badge { font-size: 12px; padding: 4px 10px; }
        .section-head h2 { font-size: 24px; }
        .pain-card { padding: 20px; }
        .results-grid { grid-template-columns: 1fr; }
        .footer-main { grid-template-columns: 1fr; gap: 28px; }
        .footer-bottom { flex-direction: column; }
        .btn { height: 44px; padding: 0 20px; font-size: 14px; }
        .btn-lg { height: 48px; font-size: 15px; }
        .news-card-featured .news-card-body { padding: 20px; }
        .news-card-featured .news-card-body h3 { font-size: 18px; }
        .news-card-compact { flex-direction: row; padding: 14px 16px; }
        .news-card-compact .news-card-body h3 { font-size: 15px; }
    }

/* roulang page: article */
:root {
    --primary: #3D6FE0;
    --primary-dark: #2D5BC7;
    --primary-light: rgba(61, 111, 224, 0.10);
    --secondary: #0EAF96;
    --secondary-light: #E6F7F4;
    --bg-main: #F7FAFE;
    --bg-blue: #EEF4FB;
    --bg-card: #FFFFFF;
    --bg-dark: #14294A;
    --text-main: #24344D;
    --text-secondary: #60708A;
    --text-muted: #A6B4C8;
    --border: #E3EBF5;
    --amber: #F5B841;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-1: 0 2px 12px rgba(20, 41, 74, 0.06);
    --shadow-2: 0 8px 28px rgba(20, 41, 74, 0.10);
    --shadow-3: 0 16px 48px rgba(20, 41, 74, 0.14);
    --transition: all 0.25s ease-out;
    --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    background: var(--bg-main);
    color: var(--text-main);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.grid-container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 3px solid rgba(61, 111, 224, 0.35);
    outline-offset: 2px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: var(--transition);
    line-height: 1.2;
    min-height: 44px;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 14px rgba(61, 111, 224, 0.20);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(61, 111, 224, 0.28);
    color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(61, 111, 224, 0.18); }
.btn-secondary {
    background: #fff;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-secondary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-1);
    color: var(--primary);
}
.btn-sm { padding: 9px 22px; font-size: 14px; min-height: 40px; }

/* ========== 导航 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(24px) saturate(1.3);
    -webkit-backdrop-filter: blur(24px) saturate(1.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.30);
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.96);
    border-bottom-color: var(--border);
    box-shadow: 0 4px 20px rgba(20, 41, 74, 0.06);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    gap: 24px;
}
.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.2;
    flex-shrink: 0;
}
.logo-mark {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 15px;
    letter-spacing: -0.5px;
    box-shadow: 0 4px 10px rgba(61, 111, 224, 0.25);
}
.logo-text { white-space: nowrap; }
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
}
.nav-link {
    display: inline-block;
    padding: 10px 14px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}
.nav-link:hover { color: var(--primary); background: rgba(61, 111, 224, 0.06); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    border-radius: 999px;
    background: var(--primary);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--border);
}
.hamburger span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--text-main);
    border-radius: 999px;
    transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== 文章页 Hero ========== */
.article-hero {
    padding: 140px 0 56px;
    background: linear-gradient(180deg, #F0F6FF 0%, #E6EFFB 100%);
    position: relative;
    overflow: hidden;
}
.article-hero::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -20%;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(61, 111, 224, 0.12) 0%, transparent 70%);
    pointer-events: none;
}
.article-hero::after {
    content: '';
    position: absolute;
    bottom: -120px;
    left: 10%;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(14, 175, 150, 0.08) 0%, transparent 70%);
    pointer-events: none;
}
.article-hero .grid-container { position: relative; z-index: 1; }

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    font-size: 14px;
    color: var(--text-secondary);
    gap: 6px;
    margin-bottom: 28px;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 999px;
    display: inline-flex;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-muted); margin: 0 4px; }
.breadcrumb .current { color: var(--text-main); font-weight: 500; max-width: 240px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.article-header {
    max-width: 780px;
    margin: 0;
}
.article-header .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--secondary-light);
    color: var(--secondary);
    font-size: 13px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 999px;
    margin-bottom: 18px;
}
.article-header .badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--secondary);
    flex-shrink: 0;
}
.article-header h1 {
    font-size: 38px;
    line-height: 1.35;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    font-size: 14px;
    color: var(--text-secondary);
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-meta svg {
    width: 16px;
    height: 16px;
    stroke: var(--text-muted);
}
.meta-divider {
    width: 1px;
    height: 16px;
    background: #D3E0F0;
}

/* ========== 正文区 ========== */
.article-content-wrap {
    background: var(--bg-main);
    padding: 56px 0 0;
}
.article-body {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 24px;
}
.article-thumb {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: var(--shadow-1);
    border: 1px solid var(--border);
}
.article-thumb img { width: 100%; height: 340px; object-fit: cover; }
.article-content {
    font-size: 16px;
    line-height: 1.85;
    color: var(--text-main);
}
.article-content p { margin-bottom: 1.6em; }
.article-content h2 {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
    margin: 2.2em 0 0.9em;
    padding-bottom: 0.4em;
    border-bottom: 1px solid var(--border);
}
.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    margin: 2em 0 0.7em;
}
.article-content h4 {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.5;
    margin: 1.6em 0 0.5em;
}
.article-content img {
    border-radius: var(--radius-md);
    margin: 28px 0;
    box-shadow: var(--shadow-1);
    max-width: 100%;
}
.article-content figure { margin: 28px 0; }
.article-content figcaption {
    font-size: 13px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 12px;
}
.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--bg-blue);
    padding: 20px 24px;
    margin: 28px 0;
    border-radius: 0 14px 14px 0;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.75;
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content ul,
.article-content ol {
    margin: 0 0 1.6em 1.2em;
    padding-left: 0.4em;
}
.article-content ul li,
.article-content ol li {
    margin-bottom: 0.4em;
    padding-left: 0.2em;
    position: relative;
}
.article-content ul li::before {
    content: '';
    position: absolute;
    left: -1em;
    top: 0.65em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}
.article-content ol { list-style: decimal; }
.article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(61, 111, 224, 0.3);
}
.article-content a:hover {
    color: var(--primary-dark);
    text-decoration-color: var(--primary);
}
.article-content strong { font-weight: 700; color: var(--text-main); }
.article-content code {
    background: var(--bg-blue);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
    color: var(--primary-dark);
}
.article-content pre {
    background: var(--bg-dark);
    color: #DCE6F5;
    padding: 24px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 28px 0;
    font-size: 14px;
    line-height: 1.7;
}
.article-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
}
.article-content th,
.article-content td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-content th {
    background: var(--bg-blue);
    font-weight: 600;
}
.article-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 32px 0;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 48px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    background: #EEF2F8;
    border: 1px solid #E3EBF5;
    padding: 6px 16px;
    border-radius: 999px;
    transition: var(--transition);
}
.tag:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-light); }
.tag::before { content: '#'; color: var(--primary); font-weight: 600; }

/* ========== 内容未找到 ========== */
.article-not-found {
    max-width: 680px;
    margin: 40px auto 0;
    padding: 56px 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-1);
    text-align: center;
}
.not-found-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: var(--bg-blue);
    display: flex;
    align-items: center;
    justify-content: center;
}
.not-found-icon svg { width: 32px; height: 32px; stroke: var(--primary); }
.article-not-found h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 14px;
}
.article-not-found p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 28px;
    line-height: 1.7;
}

/* ========== 相关推荐 ========== */
.related-section {
    background: var(--bg-blue);
    margin-top: 64px;
    padding: 72px 0;
}
.related-section .section-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-main);
}
.related-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.related-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-1);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}
.related-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2);
}
.related-cover {
    height: 180px;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, #E8F0FE, #DCE9FA);
}
.related-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.related-card:hover .related-cover img { transform: scale(1.02); }
.related-card .card-body {
    padding: 22px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.related-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    line-height: 1.4;
    transition: var(--transition);
}
.related-card:hover h3 { color: var(--primary); }
.related-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    flex: 1;
}
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    border-top: 1px solid #EEF2F8;
    font-size: 13px;
    color: var(--text-muted);
}
.read-more {
    color: var(--primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}
.read-more:hover { gap: 8px; }
.back-list {
    text-align: center;
    margin-top: 40px;
}
.back-list a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--primary);
    transition: var(--transition);
    min-height: 44px;
}
.back-list a:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}
.back-list a svg {
    width: 18px;
    height: 18px;
    transition: transform 0.25s ease;
}
.back-list a:hover svg { transform: translateX(-4px); }

/* ========== 页脚 ========== */
.site-footer {
    background: var(--bg-dark);
    color: #C4CFE0;
    padding: 64px 0 0;
    font-size: 14px;
}
.site-footer .container {
    max-width: 1200px;
    padding: 0 24px;
}
.footer-main {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .nav-logo {
    color: #fff;
    margin-bottom: 16px;
}
.footer-brand .logo-mark {
    background: var(--primary);
    color: #fff;
}
.footer-brand p {
    color: #93A5BF;
    line-height: 1.7;
    max-width: 280px;
}
.footer-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    border-radius: 999px;
    background: var(--primary);
}
.footer-links,
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
    list-style: none;
    margin: 0;
}
.footer-links a {
    color: #93A5BF;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.footer-links a::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(147, 165, 191, 0.5);
    transition: var(--transition);
}
.footer-links a:hover {
    color: #AECBFF;
    padding-left: 4px;
}
.footer-links a:hover::before {
    background: var(--primary);
}
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #93A5BF;
}
.footer-contact svg {
    width: 18px;
    height: 18px;
    stroke: #6E84A8;
    flex-shrink: 0;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: #6E84A8;
    font-size: 13px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    .article-header h1 { font-size: 32px; }
    .article-thumb img { height: 280px; }
}
@media (max-width: 768px) {
    .site-header { height: 60px; }
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: 16px 24px 24px;
        box-shadow: var(--shadow-2);
        gap: 4px;
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        border-radius: 0 0 16px 16px;
    }
    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-link {
        font-size: 17px;
        padding: 14px 12px;
        width: 100%;
        border-bottom: 1px solid #F0F4FA;
    }
    .nav-link.active::after { display: none; }
    .nav-link.active { background: var(--primary-light); border-radius: 10px; }
    .nav-actions .btn-sm { display: none; }
    .article-hero { padding: 100px 0 40px; }
    .article-header h1 { font-size: 27px; }
    .article-meta { gap: 14px; }
    .meta-divider { display: none; }
    .breadcrumb { font-size: 13px; padding: 6px 12px; margin-bottom: 20px; }
    .article-content-wrap { padding-top: 40px; }
    .article-thumb img { height: 200px; }
    .related-grid { grid-template-columns: 1fr; }
    .related-section { padding: 56px 0; }
    .related-section .section-title { font-size: 24px; margin-bottom: 30px; }
    .article-not-found { padding: 40px 24px; }
    .article-not-found h1 { font-size: 24px; }
    .footer-main { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .footer-brand p { max-width: 100%; }
}
@media (max-width: 520px) {
    .container, .grid-container, .nav-container, .site-footer .container { padding-left: 16px; padding-right: 16px; }
    .article-body { padding: 0 16px; }
    .article-header h1 { font-size: 24px; }
    .article-content { font-size: 15px; }
    .article-content h2 { font-size: 22px; }
    .article-content h3 { font-size: 18px; }
    .article-content pre { padding: 16px; font-size: 13px; }
    .related-cover { height: 160px; }
    .card-footer { flex-direction: column; align-items: flex-start; gap: 6px; }
    .article-meta { font-size: 13px; }
}

/* roulang page: category1 */
:root {
            --primary: #3D6FE0;
            --primary-dark: #2E5BC8;
            --primary-light: #E8EFFF;
            --accent: #0EAF96;
            --accent-light: #E6F7F3;
            --bg: #F7FAFE;
            --bg-alt: #EEF4FB;
            --card-bg: #FFFFFF;
            --dark: #14294A;
            --dark-2: #1E3A66;
            --text: #24344D;
            --text-secondary: #60708A;
            --text-muted: #A6B4C8;
            --border: #E3EBF5;
            --warning: #F5B841;
            --danger: #D85A5A;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 12px rgba(20, 41, 74, 0.06);
            --shadow-md: 0 8px 28px rgba(20, 41, 74, 0.10);
            --shadow-lg: 0 16px 48px rgba(20, 41, 74, 0.14);
            --transition: 200ms ease-out;
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

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

        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

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

        input,
        textarea {
            font-family: inherit;
            font-size: 15px;
        }

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

        h1,
        h2,
        h3,
        h4 {
            margin: 0 0 16px;
            line-height: 1.4;
            color: var(--text);
            font-weight: 700;
        }

        h1 {
            font-size: clamp(30px, 3.4vw, 42px);
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: clamp(24px, 2.4vw, 30px);
            letter-spacing: -0.01em;
        }

        h3 {
            font-size: clamp(18px, 1.6vw, 20px);
            font-weight: 600;
            line-height: 1.5;
        }

        h4 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
        }

        p {
            margin: 0 0 16px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 96px 0;
        }

        .section-alt {
            background-color: var(--bg-alt);
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 48px;
        }

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

        .section-head.light {
            color: #fff;
        }

        .section-head.light h2 {
            color: #fff;
        }

        .section-head.light p {
            color: rgba(255, 255, 255, 0.72);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: 999px;
            padding: 5px 14px;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .section-tag.blue {
            color: var(--primary);
            background: var(--primary-light);
        }

        .section-tag.dark-tag {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(24px) saturate(1.3);
            -webkit-backdrop-filter: blur(24px) saturate(1.3);
            border-bottom: 1px solid rgba(255, 255, 255, 0.30);
            transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(20, 41, 74, 0.06);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, #4F7FE8 100%);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.02em;
            box-shadow: 0 4px 12px rgba(61, 111, 224, 0.28);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            height: 44px;
            padding: 0 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(61, 111, 224, 0.06);
        }

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            transition: all var(--transition);
            outline: none;
            white-space: nowrap;
            line-height: 1;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.30);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(61, 111, 224, 0.26);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(61, 111, 224, 0.28);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(61, 111, 224, 0.20);
        }

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

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

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-sm {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        .btn-lg {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }

        .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: auto;
            padding: 0;
            background: none;
            border: none;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
        }

        .btn-link svg {
            transition: transform var(--transition);
        }

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

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            width: 42px;
            height: 42px;
            padding: 10px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border);
            gap: 5px;
            align-items: center;
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform 250ms ease-out, opacity 250ms ease-out;
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            min-height: 400px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            padding: 140px 0 72px;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 30, 60, 0.82) 0%, rgba(20, 41, 74, 0.68) 50%, rgba(61, 111, 224, 0.38) 100%);
            z-index: -1;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(600px 300px at 80% 20%, rgba(255, 255, 255, 0.10), transparent 70%);
            z-index: -1;
        }

        .hero-inner {
            width: 100%;
            color: #fff;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.82);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb .sep {
            opacity: 0.5;
        }

        .hero-inner h1 {
            color: #fff;
            margin-bottom: 20px;
            max-width: 720px;
        }

        .hero-inner .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.86);
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.92);
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.20);
            border-radius: 999px;
            padding: 6px 16px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .hero-badge svg {
            width: 14px;
            height: 14px;
            stroke: var(--accent);
        }

        /* ===== Intro ===== */
        .section-intro {
            background: #fff;
        }

        .intro-copy {
            padding-right: 40px;
            padding-top: 16px;
        }

        .intro-copy h2 {
            margin-bottom: 20px;
        }

        .intro-copy p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .intro-media {
            position: relative;
        }

        .intro-media img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4 / 3;
        }

        .intro-media::after {
            content: "";
            position: absolute;
            inset: 20px -20px -20px 20px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(61, 111, 224, 0.10), rgba(14, 175, 150, 0.08));
            z-index: -1;
        }

        .intro-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 24px;
        }

        .intro-point {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text);
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            border: 1px solid var(--border);
        }

        .intro-point svg {
            width: 18px;
            height: 18px;
            stroke: var(--accent);
            flex-shrink: 0;
        }

        /* ===== Feature ===== */
        .section-feature {
            background: var(--bg-alt);
        }

        .feature-wide {
            display: block;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            margin-bottom: 24px;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .feature-wide:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .feature-wide .grid-x {
            align-items: stretch;
        }

        .feature-wide .feature-img {
            min-height: 260px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .feature-wide .feature-body {
            padding: 36px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .feature-body h3 {
            margin-bottom: 12px;
        }

        .feature-body p {
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 20px;
            margin-bottom: 20px;
        }

        .feature-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text);
        }

        .feature-list li::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
        }

        .feature-tall {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .feature-tall:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .feature-tall .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .feature-tall .feature-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--primary);
        }

        .feature-tall h3 {
            margin-bottom: 8px;
        }

        .feature-tall p {
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 14px;
            flex-grow: 1;
        }

        .feature-tall .feature-more {
            margin-top: 16px;
        }

        .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 12px;
            background: var(--accent-light);
            color: var(--accent);
            margin-bottom: 14px;
        }

        .badge.blue {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Process ===== */
        .section-process {
            background: #fff;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }

        .process-item {
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 32px 24px;
            position: relative;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .process-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .process-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            font-feature-settings: "tnum";
            font-variant-numeric: tabular-nums;
            margin-bottom: 20px;
            box-shadow: 0 6px 16px rgba(61, 111, 224, 0.24);
        }

        .process-item h3 {
            font-size: 17px;
            margin-bottom: 10px;
        }

        .process-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Values dark ===== */
        .section-values {
            background: var(--dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .section-values::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -100px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 111, 224, 0.30), transparent 70%);
            pointer-events: none;
        }

        .section-values::after {
            content: "";
            position: absolute;
            bottom: -100px;
            left: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(14, 175, 150, 0.18), transparent 70%);
            pointer-events: none;
        }

        .section-values .container {
            position: relative;
            z-index: 1;
        }

        .values-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .value-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: background var(--transition), transform var(--transition);
        }

        .value-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-2px);
        }

        .value-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .value-icon svg {
            width: 22px;
            height: 22px;
            stroke: var(--accent);
        }

        .value-item h3 {
            color: #fff;
            font-size: 17px;
            margin-bottom: 10px;
        }

        .value-item p {
            color: rgba(255, 255, 255, 0.66);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .section-faq {
            background: var(--bg);
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 8px 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 0 28px;
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            list-style: none;
            padding: 22px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
            outline: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-item summary:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.30);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--bg);
            border: 1px solid var(--border);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            position: relative;
            transition: transform 250ms ease-out, background var(--transition), border-color var(--transition);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--text-secondary);
            border-radius: 2px;
            transition: background var(--transition);
        }

        .faq-icon::before {
            width: 10px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 10px;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            border-color: var(--primary);
        }

        .faq-item[open] .faq-icon::before,
        .faq-item[open] .faq-icon::after {
            background: #fff;
        }

        .faq-item[open] summary {
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            max-width: 680px;
        }

        .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .section-cta {
            background: var(--bg);
            padding: 80px 0 96px;
        }

        .cta-box {
            background: linear-gradient(135deg, #EEF4FB 0%, #E3ECFA 50%, #DCEAF8 100%);
            border-radius: var(--radius-xl);
            padding: 48px 56px;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(61, 111, 224, 0.10);
            position: relative;
            overflow: hidden;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 111, 224, 0.14), transparent 70%);
            pointer-events: none;
        }

        .cta-copy h2 {
            margin-bottom: 16px;
        }

        .cta-copy p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 420px;
        }

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

        .form-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }

        .form-card .form-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text);
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 44px;
            border: 1px solid #C9D6E8;
            border-radius: var(--radius-sm);
            padding: 0 14px;
            font-size: 15px;
            color: var(--text);
            background: #fff;
            transition: border-color var(--transition), box-shadow var(--transition);
            outline: none;
        }

        .form-group textarea {
            height: 88px;
            padding: 12px 14px;
            resize: vertical;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(61, 111, 224, 0.12);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-muted);
        }

        .form-card.has-error .form-group input {
            border-color: var(--danger);
        }

        .form-card.has-error .form-group input:focus {
            box-shadow: 0 0 0 3px rgba(216, 90, 90, 0.12);
        }

        .form-card.has-success .form-group input {
            border-color: var(--accent);
        }

        .form-success {
            margin-top: 14px;
            font-size: 14px;
            color: var(--accent);
            background: var(--accent-light);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-weight: 500;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.72);
            padding: 72px 0 0;
            font-size: 14px;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
        }

        .footer-brand .nav-logo {
            margin-bottom: 16px;
        }

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.8;
            font-size: 14px;
            margin-top: 14px;
            max-width: 280px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.66);
            transition: color var(--transition);
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.66);
        }

        .footer-contact svg {
            width: 18px;
            height: 18px;
            stroke: #AECBFF;
            flex-shrink: 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 24px 0;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.44);
            font-size: 13px;
        }

        /* ===== Mobile Menu ===== */
        @media (max-width: 1024px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .footer-main {
                grid-template-columns: 1fr 1fr;
            }

            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                padding: 12px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                transition: transform 300ms ease-out;
                z-index: 999;
                max-height: calc(100vh - 80px);
                overflow-y: auto;
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-link {
                width: 100%;
                height: 48px;
                padding: 0 12px;
            }

            .nav-link.active::after {
                left: 12px;
                right: auto;
                width: 24px;
            }

            .hamburger {
                display: inline-flex;
            }

            .footer-main {
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-container {
                height: 60px;
                padding-left: 16px;
                padding-right: 16px;
            }

            .logo-text {
                font-size: 16px;
            }

            .logo-mark {
                width: 36px;
                height: 36px;
                font-size: 16px;
                border-radius: 10px;
            }

            .nav-menu {
                top: 60px;
            }

            .btn-sm {
                display: none;
            }

            .page-hero {
                min-height: 360px;
                padding: 108px 0 56px;
            }

            .hero-inner h1 {
                font-size: 28px;
            }

            .hero-inner .hero-desc {
                font-size: 15px;
            }

            .hero-badges {
                gap: 8px;
            }

            .hero-badge {
                font-size: 12px;
                padding: 5px 12px;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .intro-copy {
                padding-right: 0;
                padding-bottom: 24px;
            }

            .intro-media img {
                aspect-ratio: 16 / 10;
            }

            .feature-wide .feature-body {
                padding: 24px;
            }

            .feature-list {
                grid-template-columns: 1fr;
            }

            .feature-tall {
                margin-bottom: 16px;
                padding: 24px;
            }

            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .process-item {
                padding: 24px;
            }

            .values-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .value-item {
                padding: 24px;
            }

            .faq-wrap {
                padding: 4px 0;
            }

            .faq-item {
                padding: 0 20px;
            }

            .faq-item summary {
                padding: 18px 0;
                font-size: 15px;
            }

            .section-cta {
                padding: 56px 0 64px;
            }

            .cta-box {
                padding: 32px 20px;
                border-radius: var(--radius-lg);
            }

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

            .form-card {
                padding: 24px;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer-brand p {
                max-width: none;
            }
        }

        @media (max-width: 480px) {
            .process-grid {
                grid-template-columns: 1fr;
            }

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

            .btn-lg {
                width: 100%;
            }
        }

        .no-scroll {
            overflow: hidden;
        }

        .skip-link {
            position: absolute;
            left: -9999px;
            top: 0;
            background: var(--primary);
            color: #fff;
            padding: 8px 16px;
            border-radius: 0 0 var(--radius-sm) 0;
            z-index: 2000;
        }

        .skip-link:focus {
            left: 0;
        }

/* roulang page: category3 */
:root {
            --primary: #3D6FE0;
            --primary-dark: #2A56C4;
            --accent: #0EAF96;
            --bg-main: #F7FAFE;
            --bg-card: #FFFFFF;
            --bg-tint: #EEF4FB;
            --dark: #14294A;
            --text-main: #24344D;
            --text-sub: #60708A;
            --text-light: #A6B4C8;
            --border: #E3EBF5;
            --amber: #F5B841;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-1: 0 2px 12px rgba(20, 41, 74, 0.06);
            --shadow-2: 0 8px 28px rgba(20, 41, 74, 0.10);
            --space-section: 96px;
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg-main);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        ul,
        ol {
            list-style-position: inside;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(24px) saturate(1.3);
            -webkit-backdrop-filter: blur(24px) saturate(1.3);
            border-bottom: 1px solid rgba(255, 255, 255, 0.30);
            transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(20, 41, 74, 0.06);
        }
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            font-weight: 800;
            letter-spacing: -0.02em;
            box-shadow: 0 4px 12px rgba(61, 111, 224, 0.25);
        }
        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: #45556B;
            border-radius: 8px;
            border-bottom: 2px solid transparent;
            transition: color 0.2s ease, background 0.2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(61, 111, 224, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-family: var(--font-stack);
            font-size: 15px;
            font-weight: 600;
            border-radius: 8px;
            padding: 12px 28px;
            cursor: pointer;
            border: 1px solid transparent;
            transition: background 0.25s ease, color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease, border-color 0.25s ease;
            min-height: 44px;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.3);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(61, 111, 224, 0.2);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(61, 111, 224, 0.28);
        }
        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(61, 111, 224, 0.2);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: #F0F6FF;
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(61, 111, 224, 0.12);
        }
        .btn-secondary:active {
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            min-height: 40px;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
        }
        .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: transparent;
            border: none;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            padding: 8px 4px;
            border-radius: 6px;
            transition: gap 0.25s ease, color 0.2s ease;
            min-height: 44px;
        }
        .btn-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }
        .btn-link:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.3);
            outline-offset: 2px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 10px;
            border-radius: 8px;
        }
        .hamburger span {
            display: block;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .hamburger:hover {
            background: rgba(61, 111, 224, 0.08);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .page-hero {
            position: relative;
            padding: 180px 0 80px;
            margin-top: 0;
            background: linear-gradient(135deg, #EFF6FF 0%, #E3EDFB 40%, #D9E8F8 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.16;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: linear-gradient(90deg, rgba(20, 41, 74, 0.45) 0%, rgba(20, 41, 74, 0.15) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero .hero-inner {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 20px;
            box-shadow: 0 2px 8px rgba(20, 41, 74, 0.06);
        }
        .hero-badge::before {
            content: '';
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
        }
        .page-hero h1 {
            font-size: 42px;
            line-height: 1.3;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            text-shadow: 0 2px 12px rgba(20, 41, 74, 0.25);
        }
        .page-hero .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.92);
            max-width: 600px;
            margin-bottom: 28px;
            text-shadow: 0 1px 6px rgba(20, 41, 74, 0.2);
        }
        .page-hero .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: var(--bg-tint);
        }
        .section-white {
            background: #fff;
        }
        .section-dark {
            background: var(--dark);
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .section-head h2 {
            font-size: 30px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.75;
        }
        .section-head.centered {
            text-align: center;
        }
        .section-head .section-tag {
            display: inline-block;
            background: rgba(61, 111, 224, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-2);
            position: relative;
        }
        .split-media img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            display: block;
        }
        .split-content {
            padding: 8px 0;
        }
        .split-content h2 {
            font-size: 30px;
            line-height: 1.4;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text-main);
        }
        .split-content .content-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-sub);
            margin-bottom: 24px;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .feature-list li {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .feature-num {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            font-variant-numeric: tabular-nums;
            box-shadow: 0 4px 12px rgba(61, 111, 224, 0.2);
        }
        .feature-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0 0 6px;
            color: var(--text-main);
        }
        .feature-item p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.6;
            margin: 0;
            max-width: 480px;
        }
        .subsection-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-top: 32px;
        }
        .subsection-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-1);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }
        .subsection-card:hover {
            box-shadow: var(--shadow-2);
            transform: translateY(-3px);
        }
        .subsection-card.wide {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 32px;
            align-items: center;
            padding: 40px;
        }
        .subsection-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(14, 175, 150, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            margin-bottom: 20px;
        }
        .subsection-card h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-main);
            margin: 0 0 12px;
        }
        .subsection-card p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0 0 16px;
        }
        .subsection-card ul {
            list-style: disc;
            padding-left: 20px;
            margin: 0 0 16px;
        }
        .subsection-card ul li {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 4px;
        }
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .case-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-1);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            box-shadow: var(--shadow-2);
            transform: translateY(-4px);
        }
        .case-card-cover {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .case-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .case-card:hover .case-card-cover img {
            transform: scale(1.03);
        }
        .case-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(6px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(20, 41, 74, 0.08);
        }
        .case-card-body {
            padding: 24px 24px 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .case-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-main);
            margin: 0 0 10px;
        }
        .case-card-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0 0 16px;
            flex: 1;
        }
        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .case-meta a {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
        }
        .case-meta a:hover {
            color: var(--primary-dark);
        }
        .case-meta time {
            font-variant-numeric: tabular-nums;
        }
        .stats-band {
            background: var(--dark);
            padding: 72px 0;
        }
        .stats-band .section-head h2 {
            color: #fff;
        }
        .stats-band .section-head p {
            color: rgba(255, 255, 255, 0.75);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 48px;
        }
        .stat-item {
            text-align: center;
            padding: 24px 12px;
            border-left: 1px solid rgba(255, 255, 255, 0.15);
        }
        .stat-item:first-child {
            border-left: none;
        }
        .stat-value {
            font-size: 48px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.03em;
        }
        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.72);
            margin-top: 8px;
        }
        .stat-note {
            text-align: center;
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
            margin-top: 32px;
        }
        .faq-container {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-1);
        }
        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            cursor: pointer;
            font-family: var(--font-stack);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: background 0.2s ease;
            min-height: 60px;
        }
        .faq-question:hover {
            background: rgba(61, 111, 224, 0.04);
        }
        .faq-question:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.3);
            outline-offset: -3px;
            border-radius: var(--radius-md);
        }
        .faq-item.active .faq-question {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            position: relative;
            transition: transform 0.3s ease;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--text-sub);
            border-radius: 2px;
            transition: background 0.2s ease, transform 0.3s ease;
        }
        .faq-icon::before {
            top: 10px;
            left: 3px;
            width: 16px;
            height: 2px;
        }
        .faq-icon::after {
            top: 3px;
            left: 10px;
            width: 2px;
            height: 16px;
        }
        .faq-item.active .faq-icon::before {
            background: var(--primary);
        }
        .faq-item.active .faq-icon::after {
            background: var(--primary);
            transform: rotate(90deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-sub);
            margin: 0;
        }
        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, #EEF4FF 0%, #E0EDFE 100%);
            border-radius: 24px;
            padding: 56px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 40px;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(61, 111, 224, 0.12) 0%, transparent 65%);
            top: -120px;
            right: -80px;
            border-radius: 50%;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            flex: 1;
        }
        .cta-content h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-main);
            margin: 0 0 10px;
        }
        .cta-content p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
            max-width: 480px;
        }
        .cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 64px 0 0;
            font-size: 14px;
        }
        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .nav-logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo-text {
            color: #fff;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.75;
            margin: 0;
            max-width: 320px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: #AECBFF;
        }
        .footer-contact {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }
        .footer-contact svg {
            width: 18px;
            height: 18px;
            color: var(--accent);
            flex-shrink: 0;
        }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            padding: 16px 24px 24px;
            z-index: 999;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 32px rgba(20, 41, 74, 0.1);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-menu .nav-link {
            display: block;
            padding: 14px 8px;
            font-size: 17px;
            border-bottom: 1px solid rgba(227, 235, 245, 0.7);
            border-radius: 0;
        }
        .mobile-menu .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--border);
            font-weight: 600;
        }
        .mobile-menu .btn {
            margin-top: 16px;
            width: 100%;
        }
        @media (max-width: 1024px) {
            :root {
                --space-section: 72px;
            }
            .split-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .split-media img {
                height: 320px;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stat-item {
                border-left: none;
            }
            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .subsection-card.wide {
                grid-template-columns: 1fr;
            }
            .cta-banner {
                flex-direction: column;
                text-align: center;
                padding: 40px 32px;
            }
            .cta-actions {
                justify-content: center;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space-section: 56px;
            }
            .site-header {
                height: 60px;
            }
            .nav-container {
                padding: 0 16px;
            }
            .nav-menu {
                display: none;
            }
            .nav-actions .btn {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .page-hero {
                padding: 130px 0 60px;
            }
            .page-hero h1 {
                font-size: 30px;
                line-height: 1.35;
            }
            .page-hero .hero-desc {
                font-size: 16px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .split-media img {
                height: 240px;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-value {
                font-size: 36px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer p {
                padding: 0 18px 16px;
            }
            .cta-banner {
                border-radius: 18px;
                padding: 32px 24px;
            }
            .cta-content h2 {
                font-size: 24px;
            }
            .footer-main {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .page-hero .hero-actions .btn {
                width: 100%;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .subsection-card {
                padding: 24px 20px;
            }
            .subsection-card.wide {
                padding: 24px 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-item {
                padding: 16px 12px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #3D6FE0;
            --primary-dark: #2A5BC8;
            --primary-deep: #1E4AA8;
            --primary-soft: #EEF4FB;
            --secondary: #0EAF96;
            --secondary-soft: #E2F6F1;
            --bg: #F7FAFE;
            --bg-alt: #EEF4FB;
            --card-bg: #FFFFFF;
            --dark: #14294A;
            --text: #24344D;
            --text-muted: #60708A;
            --text-light: #A6B4C8;
            --border: #E3EBF5;
            --amber: #F5B841;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(20, 41, 74, 0.06);
            --shadow-md: 0 8px 28px rgba(20, 41, 74, 0.10);
            --shadow-lg: 0 16px 48px rgba(20, 41, 74, 0.14);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition: 200ms ease-out;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(24px) saturate(1.3);
            -webkit-backdrop-filter: blur(24px) saturate(1.3);
            border-bottom: 1px solid rgba(255, 255, 255, 0.30);
            transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(20, 41, 74, 0.06);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            height: 72px;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 12px rgba(61, 111, 224, 0.25);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
        }

        .nav-link {
            display: block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
        }

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

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 4px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

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

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            border: none;
            background: transparent;
            border-radius: var(--radius-sm);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            padding: 0;
            transition: background var(--transition);
        }

        .hamburger:hover {
            background: var(--primary-soft);
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        .hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            white-space: nowrap;
            transition: all var(--transition);
            text-decoration: none;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.30);
            outline-offset: 2px;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(61, 111, 224, 0.25);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 8px rgba(61, 111, 224, 0.20);
        }

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

        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(61, 111, 224, 0.12);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-sm {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        .btn-lg {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }

        /* ========== Page Hero ========== */
        .page-hero {
            position: relative;
            min-height: 400px;
            display: flex;
            align-items: center;
            padding: 120px 0 64px;
            background: linear-gradient(135deg, rgba(20, 41, 74, 0.82), rgba(61, 111, 224, 0.72)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-breadcrumb {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition);
        }

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

        .hero-breadcrumb .sep {
            opacity: 0.5;
        }

        .page-hero h1 {
            font-size: 42px;
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 16px;
            max-width: 720px;
        }

        .page-hero .hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.90);
            max-width: 560px;
            margin-bottom: 28px;
        }

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

        .hero-tag {
            display: inline-flex;
            align-items: center;
            height: 30px;
            padding: 0 14px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: #fff;
            backdrop-filter: blur(10px);
        }

        /* ========== Section Common ========== */
        .section {
            padding: 96px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            height: 28px;
            padding: 0 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--secondary);
            background: var(--secondary-soft);
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .section-title {
            font-size: 30px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-muted);
            max-width: 640px;
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Intro Overview ========== */
        .intro-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }

        .intro-media img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        .intro-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(20, 41, 74, 0.02), transparent 40%);
            pointer-events: none;
        }

        .intro-copy p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .intro-points {
            list-style: none;
            margin: 24px 0 0;
            display: grid;
            gap: 14px;
        }

        .intro-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
        }

        .intro-points li::before {
            content: "";
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--secondary);
            flex-shrink: 0;
        }

        /* ========== Service Grid ========== */
        .service-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .service-card--wide {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: stretch;
        }

        .service-card--wide .service-card-media {
            min-height: 300px;
        }

        .service-card--wide .service-card-body {
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .service-card--tall .service-card-media {
            height: 220px;
        }

        .service-card--tall .service-card-body {
            padding: 28px;
        }

        .service-card-media {
            position: relative;
            overflow: hidden;
        }

        .service-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 300ms ease-out;
        }

        .service-card:hover .service-card-media img {
            transform: scale(1.03);
        }

        .service-card-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(20, 41, 74, 0.06), transparent 50%);
            pointer-events: none;
        }

        .service-card-body h3 {
            font-size: 20px;
            line-height: 1.5;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .service-card-body p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            height: 28px;
            padding: 0 12px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 999px;
            background: var(--primary-soft);
            color: var(--primary);
        }

        .tag--secondary {
            background: var(--secondary-soft);
            color: var(--secondary);
        }

        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            transition: background var(--transition);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 28px;
            background: transparent;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            border-radius: 0;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
            background: rgba(61, 111, 224, 0.02);
        }

        .faq-question:focus-visible {
            outline: 3px solid rgba(61, 111, 224, 0.30);
            outline-offset: -3px;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1.5px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 400;
            color: var(--primary);
            transition: transform var(--transition), background var(--transition), border-color var(--transition);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 300ms ease-out;
        }

        .faq-answer-inner {
            padding: 0 28px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-muted);
        }

        /* ========== CTA ========== */
        .cta-inner {
            background: linear-gradient(135deg, #EEF4FB, #E0EBFA);
            border: 1px solid rgba(61, 111, 224, 0.10);
            border-radius: var(--radius-lg);
            padding: 56px 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            box-shadow: var(--shadow-sm);
        }

        .cta-inner h2 {
            font-size: 28px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.70);
            padding: 72px 0 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .nav-logo {
            margin-bottom: 16px !important;
        }

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-brand p {
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.60);
            max-width: 280px;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--transition);
        }

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

        .footer-contact {
            list-style: none;
            margin: 0;
            display: grid;
            gap: 12px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
        }

        .footer-contact svg {
            width: 18px;
            height: 18px;
            color: #AECBFF;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            color: rgba(255, 255, 255, 0.45);
            font-size: 13px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

            .nav-menu {
                gap: 0;
            }

            .nav-link {
                padding: 10px 12px;
                font-size: 14px;
            }

            .section {
                padding: 72px 0;
            }

            .page-hero {
                min-height: 360px;
                padding: 100px 0 56px;
            }

            .page-hero h1 {
                font-size: 34px;
            }

            .cta-inner {
                padding: 40px;
                flex-direction: column;
                align-items: flex-start;
            }

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

        @media (max-width: 768px) {
            .nav-container {
                height: 60px;
                padding: 0 16px;
            }

            .logo-text {
                font-size: 16px;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }

            .nav-menu {
                position: fixed;
                top: 60px;
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(24px);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(20, 41, 74, 0.08);
                display: none;
                max-height: calc(100vh - 60px);
                overflow-y: auto;
            }

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

            .nav-menu li {
                border-bottom: 1px solid var(--border);
            }

            .nav-menu li:last-child {
                border-bottom: none;
            }

            .nav-link {
                padding: 14px 8px;
                font-size: 17px;
                border-radius: 0;
                line-height: 1.4;
            }

            .nav-link.active::after {
                left: 8px;
                bottom: 6px;
                right: auto;
                width: 24px;
                height: 3px;
            }

            .nav-actions .btn {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .page-hero {
                min-height: 320px;
                padding: 88px 0 48px;
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .page-hero .hero-desc {
                font-size: 15px;
                line-height: 1.7;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 24px;
            }

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

            .service-card--wide {
                grid-column: auto;
                grid-template-columns: 1fr;
            }

            .service-card--wide .service-card-media {
                min-height: 200px;
                height: 200px;
            }

            .service-card--wide .service-card-body {
                padding: 24px;
            }

            .service-card--tall .service-card-body {
                padding: 24px;
            }

            .service-card--tall .service-card-media {
                height: 180px;
            }

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

            .cta-inner {
                padding: 32px 24px;
                border-radius: 20px;
            }

            .cta-inner h2 {
                font-size: 22px;
            }

            .cta-actions {
                width: 100%;
                flex-direction: column;
                align-items: stretch;
            }

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

            .footer-main {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-hero h1 {
                font-size: 24px;
            }

            .page-hero .hero-desc {
                font-size: 14px;
            }

            .hero-tag {
                height: 26px;
                font-size: 12px;
                padding: 0 12px;
            }

            .section-title {
                font-size: 22px;
            }

            .section-subtitle {
                font-size: 15px;
            }

            .service-card-body h3 {
                font-size: 18px;
            }

            .footer-main {
                grid-template-columns: 1fr;
            }
        }