/* roulang page: index */
:root {
        --primary-dark: #16302B;
        --primary-darker: #1E3D36;
        --primary-mid: #2E5A4E;
        --accent-gold: #C8913A;
        --accent-gold-light: #D4A24E;
        --bg-cream: #F7F5F0;
        --bg-white: #FFFFFF;
        --bg-sage: #EDF0E8;
        --text-dark: #1F2421;
        --text-muted: #5B6560;
        --border-default: #E2DED3;
        --border-light: #E6E3D9;
        --shadow-card: 0 12px 30px rgba(22,48,43,0.08);
        --shadow-hover: 0 18px 40px rgba(22,48,43,0.14);
        --radius-card: 16px;
        --radius-btn: 12px;
        --radius-badge: 999px;
        --font-sans: 'PingFang SC','Source Han Sans SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
        --font-num: 'DIN Alternate','Barlow','PingFang SC',sans-serif;
        --section-pad: 88px;
        --container-max: 1200px;
    }

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

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

    body {
        font-family: var(--font-sans);
        font-size: 15px;
        line-height: 1.7;
        color: var(--text-dark);
        background: var(--bg-cream);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    a {
        color: inherit;
        text-decoration: none;
        transition: color 0.2s ease, border-color 0.2s ease;
    }

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

    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
    }

    button {
        cursor: pointer;
    }

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

    /* ========== Header / Navigation ========== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-default);
        height: 72px;
        display: flex;
        align-items: center;
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 24px;
    }
    .logo {
        font-size: 20px;
        font-weight: 700;
        color: var(--primary-dark);
        letter-spacing: 0.5px;
        flex-shrink: 0;
        white-space: nowrap;
    }
    .logo:hover {
        color: var(--accent-gold);
    }
    .nav-wrapper {
        display: flex;
        align-items: center;
        gap: 28px;
    }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 28px;
        list-style: none;
    }
    .nav-list a {
        font-size: 15px;
        font-weight: 500;
        color: var(--text-dark);
        padding: 6px 0;
        position: relative;
        white-space: nowrap;
        transition: color 0.2s ease;
    }
    .nav-list a:hover {
        color: var(--primary-mid);
    }
    .nav-list a.active {
        color: var(--accent-gold);
        font-weight: 600;
    }
    .nav-list a.active::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -2px;
        width: 100%;
        height: 2px;
        background: var(--accent-gold);
        border-radius: 2px;
    }
    .nav-list a::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -2px;
        width: 0;
        height: 2px;
        background: var(--primary-mid);
        border-radius: 2px;
        transition: width 0.25s ease;
    }
    .nav-list a:hover::after {
        width: 100%;
    }
    .nav-list a.active:hover::after {
        background: var(--accent-gold);
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 24px;
        border-radius: var(--radius-btn);
        font-size: 15px;
        font-weight: 600;
        border: none;
        transition: all 0.25s ease;
        min-height: 46px;
        white-space: nowrap;
        line-height: 1.4;
    }
    .btn:focus-visible {
        outline: 3px solid rgba(200,145,58,0.35);
        outline-offset: 2px;
    }
    .btn-primary {
        background: var(--primary-dark);
        color: #fff;
    }
    .btn-primary:hover {
        background: var(--accent-gold);
        color: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: var(--shadow-hover);
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: var(--shadow-card);
    }
    .btn-secondary {
        background: transparent;
        color: #fff;
        border: 1.5px solid rgba(255,255,255,0.5);
    }
    .btn-secondary:hover {
        border-color: var(--accent-gold-light);
        color: var(--accent-gold-light);
        background: rgba(200,145,58,0.08);
    }
    .btn-gold {
        background: var(--accent-gold);
        color: var(--primary-dark);
    }
    .btn-gold:hover {
        background: var(--accent-gold-light);
        color: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: var(--shadow-hover);
    }
    .btn-outline {
        background: transparent;
        color: var(--primary-dark);
        border: 1.5px solid var(--primary-mid);
    }
    .btn-outline:hover {
        border-color: var(--accent-gold);
        color: var(--accent-gold);
        background: rgba(200,145,58,0.06);
    }
    .btn-sm {
        padding: 9px 18px;
        min-height: 40px;
        font-size: 14px;
        border-radius: 10px;
    }
    .btn-link {
        background: none;
        border: none;
        padding: 4px 0;
        color: var(--accent-gold);
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: gap 0.2s ease;
    }
    .btn-link:hover {
        gap: 10px;
        color: var(--primary-mid);
    }
    .header-cta {
        flex-shrink: 0;
    }

    /* Mobile nav toggle */
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        padding: 8px;
        cursor: pointer;
        align-items: flex-end;
    }
    .nav-toggle span {
        display: block;
        width: 26px;
        height: 2.5px;
        background: var(--primary-dark);
        border-radius: 4px;
        transition: all 0.25s ease;
    }
    .nav-toggle span:nth-child(2) {
        width: 20px;
    }
    .nav-toggle.open span:nth-child(1) {
        transform: translateY(7.5px) rotate(45deg);
    }
    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
        width: 0;
    }
    .nav-toggle.open span:nth-child(3) {
        transform: translateY(-7.5px) rotate(-45deg);
    }

    /* ========== Hero ========== */
    .hero {
        background: var(--primary-dark);
        color: #fff;
        padding: 72px 0 80px;
        position: relative;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse 60% 50% at 80% 20%, rgba(200,145,58,0.09) 0%, transparent 70%);
        pointer-events: none;
    }
    .hero::after {
        content: '';
        position: absolute;
        right: -60px;
        bottom: -60px;
        width: 260px;
        height: 260px;
        border: 1px solid rgba(200,145,58,0.22);
        border-radius: 50%;
        pointer-events: none;
    }
    .hero .container {
        display: grid;
        grid-template-columns: 7fr 5fr;
        gap: 48px;
        align-items: center;
        position: relative;
        z-index: 1;
    }
    .hero-content h1 {
        font-size: 36px;
        line-height: 1.35;
        font-weight: 700;
        margin-bottom: 20px;
        color: #fff;
        letter-spacing: 0.5px;
    }
    .hero-content .hero-sub {
        font-size: 16px;
        line-height: 1.8;
        color: rgba(255,255,255,0.82);
        max-width: 560px;
        margin-bottom: 32px;
    }
    .hero-btns {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
    }
    .hero-visual {
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }
    .hero-visual .visual-frame {
        position: relative;
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: 0 20px 50px rgba(0,0,0,0.25);
        width: 100%;
        max-width: 460px;
    }
    .hero-visual .visual-frame img {
        width: 100%;
        aspect-ratio: 4/3;
        object-fit: cover;
    }
    .hero-visual .visual-frame::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(22,48,43,0.25) 0%, transparent 60%);
        pointer-events: none;
    }
    .hero-visual .floating-badge {
        position: absolute;
        bottom: 18px;
        left: 18px;
        background: var(--accent-gold);
        color: var(--primary-dark);
        font-weight: 600;
        font-size: 13px;
        padding: 8px 16px;
        border-radius: var(--radius-badge);
        box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    }

    /* ========== Section Base ========== */
    .section {
        padding: var(--section-pad) 0;
    }
    .section-white {
        background: var(--bg-white);
    }
    .section-sage {
        background: var(--bg-sage);
    }
    .section-cream {
        background: var(--bg-cream);
    }
    .section-dark {
        background: var(--primary-dark);
        color: #fff;
    }
    .section-label {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 1px;
        text-transform: uppercase;
        color: var(--accent-gold);
        margin-bottom: 12px;
    }
    .section-title {
        font-size: 26px;
        line-height: 1.4;
        font-weight: 700;
        color: var(--text-dark);
        margin-bottom: 14px;
    }
    .section-desc {
        font-size: 15px;
        line-height: 1.8;
        color: var(--text-muted);
        max-width: 640px;
    }

    /* ========== S2 Metrics ========== */
    .metrics-bar {
        padding: 48px 0;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-light);
    }
    .metrics-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
    }
    .metric-item {
        text-align: center;
    }
    .metric-value {
        font-family: var(--font-num);
        font-size: 40px;
        font-weight: 700;
        color: var(--primary-dark);
        line-height: 1.2;
    }
    .metric-value span {
        color: var(--accent-gold);
        font-size: 28px;
    }
    .metric-label {
        font-size: 14px;
        color: var(--text-muted);
        margin-top: 8px;
        font-weight: 500;
    }

    /* ========== S3 Service Matrix ========== */
    .service-matrix-grid {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: 24px;
        margin-top: 40px;
    }
    .service-card-lg {
        grid-column: span 6;
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 36px 32px;
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
        display: flex;
        flex-direction: column;
        gap: 16px;
        position: relative;
        overflow: hidden;
    }
    .service-card-lg:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .service-card-lg .card-img {
        border-radius: 12px;
        overflow: hidden;
        height: 160px;
        margin-bottom: 8px;
    }
    .service-card-lg .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .service-card-sm {
        grid-column: span 3;
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 28px 22px;
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .service-card-sm:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .card-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        background: var(--bg-sage);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        margin-bottom: 12px;
        color: var(--primary-mid);
    }
    .service-card-lg h3, .service-card-sm h3 {
        font-size: 19px;
        font-weight: 600;
        line-height: 1.4;
        color: var(--text-dark);
    }
    .service-card-lg p, .service-card-sm p {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-muted);
        flex: 1;
    }
    .service-card-lg .btn-link, .service-card-sm .btn-link {
        font-size: 14px;
    }
    .matrix-footer {
        margin-top: 28px;
        display: flex;
        justify-content: center;
    }

    /* ========== S4 News List ========== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 40px;
    }
    .news-card {
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 24px;
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
        display: flex;
        flex-direction: column;
        gap: 12px;
        position: relative;
    }
    .news-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .news-card .news-tag {
        display: inline-block;
        font-size: 12px;
        font-weight: 600;
        color: var(--primary-dark);
        background: var(--bg-sage);
        padding: 4px 12px;
        border-radius: var(--radius-badge);
        width: fit-content;
        letter-spacing: 0.5px;
    }
    .news-card h3 {
        font-size: 17px;
        font-weight: 600;
        line-height: 1.5;
        color: var(--text-dark);
    }
    .news-card .news-summary {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-muted);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card .news-time {
        font-size: 12px;
        color: var(--text-muted);
        font-weight: 400;
    }
    .news-card .btn-link {
        margin-top: auto;
        font-size: 14px;
    }
    .news-empty {
        text-align: center;
        padding: 48px 24px;
        color: var(--text-muted);
        font-size: 15px;
        background: var(--bg-white);
        border-radius: var(--radius-card);
        border: 1px dashed var(--border-default);
        grid-column: 1 / -1;
    }
    .list-footer {
        margin-top: 32px;
        display: flex;
        justify-content: center;
    }

    /* ========== S5 Steps ========== */
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        margin-top: 40px;
    }
    .step-card {
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 32px 24px;
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
        text-align: left;
    }
    .step-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .step-num {
        font-family: var(--font-num);
        font-size: 32px;
        font-weight: 700;
        color: var(--accent-gold);
        display: block;
        margin-bottom: 12px;
    }
    .step-card h3 {
        font-size: 17px;
        font-weight: 600;
        margin-bottom: 8px;
        color: var(--text-dark);
    }
    .step-card p {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-muted);
    }

    /* ========== S6 Scenario Cards ========== */
    .scenario-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 40px;
    }
    .scenario-card {
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: all 0.3s ease;
    }
    .scenario-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .scenario-card .scenario-img {
        height: 170px;
        overflow: hidden;
    }
    .scenario-card .scenario-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }
    .scenario-card:hover .scenario-img img {
        transform: scale(1.04);
    }
    .scenario-card .scenario-body {
        padding: 22px 20px;
    }
    .scenario-card h3 {
        font-size: 17px;
        font-weight: 600;
        margin-bottom: 8px;
        color: var(--text-dark);
    }
    .scenario-card p {
        font-size: 13px;
        line-height: 1.7;
        color: var(--text-muted);
        margin-bottom: 14px;
    }
    .scenario-card .btn-link {
        font-size: 13px;
    }

    /* ========== S7 Dual Column ========== */
    .dual-col {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        margin-top: 40px;
    }
    .dual-col .col {
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 32px 28px;
        box-shadow: var(--shadow-card);
    }
    .dual-col .col h3 {
        font-size: 19px;
        font-weight: 600;
        margin-bottom: 20px;
        color: var(--text-dark);
    }
    .research-item {
        padding: 16px 0;
        border-bottom: 1px solid var(--border-light);
    }
    .research-item:last-child {
        border-bottom: none;
    }
    .research-item h4 {
        font-size: 15px;
        font-weight: 600;
        line-height: 1.5;
        margin-bottom: 6px;
    }
    .research-item p {
        font-size: 13px;
        line-height: 1.7;
        color: var(--text-muted);
        margin-bottom: 8px;
    }
    .research-item .research-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 12px;
        color: var(--text-muted);
    }
    .research-item .btn-link {
        font-size: 13px;
        margin-top: 4px;
    }
    .notice-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .notice-list li {
        padding: 14px 0;
        border-bottom: 1px solid var(--border-light);
        font-size: 14px;
        line-height: 1.6;
        color: var(--text-muted);
    }
    .notice-list li:last-child {
        border-bottom: none;
    }
    .notice-list li strong {
        color: var(--text-dark);
        font-weight: 600;
    }

    /* ========== S8 Diagnosis Form ========== */
    .diagnosis-wrapper {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
        margin-top: 40px;
    }
    .diagnosis-form {
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 36px 30px;
        box-shadow: var(--shadow-card);
    }
    .diagnosis-form h3 {
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 22px;
        color: var(--text-dark);
    }
    .form-group {
        margin-bottom: 18px;
    }
    .form-group label {
        display: block;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-dark);
        margin-bottom: 6px;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        min-height: 46px;
        padding: 10px 14px;
        border: 1.5px solid #D7D3C8;
        border-radius: 10px;
        background: var(--bg-white);
        font-size: 14px;
        color: var(--text-dark);
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
        outline: none;
        appearance: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
        border-color: var(--accent-gold);
        box-shadow: 0 0 0 4px rgba(200,145,58,0.18);
    }
    .form-group textarea {
        resize: vertical;
        min-height: 90px;
    }
    .diagnosis-side {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }
    .diagnosis-side .side-card {
        background: var(--bg-sage);
        border-radius: var(--radius-card);
        padding: 28px 24px;
        border: 1px solid var(--border-light);
    }
    .diagnosis-side .side-card h4 {
        font-size: 17px;
        font-weight: 600;
        margin-bottom: 10px;
        color: var(--primary-dark);
    }
    .diagnosis-side .side-card p {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-muted);
    }

    /* ========== S9 Market Data ========== */
    .data-board {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        display: grid;
        grid-template-columns: 1fr 1fr;
        margin-top: 40px;
        border: 1px solid var(--border-default);
    }
    .data-board .data-visual {
        min-height: 380px;
        background-size: cover;
        background-position: center;
        position: relative;
    }
    .data-board .data-visual::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(22,48,43,0.12) 0%, rgba(22,48,43,0.45) 100%);
    }
    .data-board .data-info {
        padding: 40px 32px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 16px;
    }
    .data-board .data-info h3 {
        font-size: 20px;
        font-weight: 600;
        color: var(--text-dark);
    }
    .data-board .data-info p {
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-muted);
    }
    .data-points {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 8px;
    }
    .data-point {
        background: var(--bg-sage);
        color: var(--primary-dark);
        font-size: 12px;
        font-weight: 600;
        padding: 7px 14px;
        border-radius: var(--radius-badge);
    }

    /* ========== S10 Testimonials ========== */
    .testimonial-scroll {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 40px;
        overflow-x: auto;
        padding-bottom: 12px;
        scroll-snap-type: x proximity;
    }
    .testimonial-card {
        background: var(--bg-white);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-card);
        padding: 28px 24px;
        box-shadow: var(--shadow-card);
        scroll-snap-align: start;
        min-width: 280px;
        transition: all 0.3s ease;
    }
    .testimonial-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .testimonial-card .t-quote {
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-dark);
        margin-bottom: 16px;
    }
    .testimonial-card .t-author {
        font-size: 13px;
        font-weight: 600;
        color: var(--primary-mid);
    }
    .testimonial-card .t-role {
        font-size: 12px;
        color: var(--text-muted);
    }

    /* ========== S11 FAQ ========== */
    .faq-list {
        margin-top: 36px;
        max-width: 840px;
    }
    .faq-item {
        border-bottom: 1px solid var(--border-default);
    }
    .faq-question {
        width: 100%;
        background: none;
        border: none;
        padding: 20px 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        text-align: left;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-dark);
        cursor: pointer;
        transition: color 0.2s ease;
    }
    .faq-question:hover {
        color: var(--primary-mid);
    }
    .faq-question .faq-icon {
        font-size: 22px;
        font-weight: 300;
        color: var(--accent-gold);
        transition: transform 0.25s ease;
        flex-shrink: 0;
    }
    .faq-question.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        padding: 0;
    }
    .faq-answer.open {
        max-height: 300px;
        padding-bottom: 20px;
    }
    .faq-answer p {
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-muted);
    }

    /* ========== S12 Subscribe ========== */
    .subscribe-band {
        background: var(--primary-dark);
        color: #fff;
        border-radius: var(--radius-card);
        padding: 48px 40px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
    }
    .subscribe-band h3 {
        font-size: 22px;
        font-weight: 700;
        margin-bottom: 10px;
    }
    .subscribe-band p {
        font-size: 15px;
        color: rgba(255,255,255,0.78);
        line-height: 1.7;
    }
    .subscribe-form {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    .subscribe-form input {
        flex: 1;
        min-width: 220px;
        min-height: 48px;
        padding: 10px 16px;
        border: 1.5px solid rgba(255,255,255,0.25);
        border-radius: 10px;
        background: rgba(255,255,255,0.1);
        color: #fff;
        font-size: 14px;
        outline: none;
        transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }
    .subscribe-form input::placeholder {
        color: rgba(255,255,255,0.55);
    }
    .subscribe-form input:focus {
        border-color: var(--accent-gold);
        box-shadow: 0 0 0 4px rgba(200,145,58,0.2);
    }

    /* ========== S13 Risk Disclaimer ========== */
    .risk-block {
        background: var(--bg-white);
        border-left: 4px solid var(--accent-gold);
        border-radius: 0 var(--radius-card) var(--radius-card) 0;
        padding: 24px 28px;
        box-shadow: var(--shadow-card);
    }
    .risk-block p {
        font-size: 13px;
        line-height: 1.8;
        color: var(--text-muted);
    }

    /* ========== Footer ========== */
    .site-footer {
        background: var(--primary-dark);
        color: rgba(255,255,255,0.82);
        padding: 56px 0 28px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1.2fr 1.2fr 1.2fr 1.2fr;
        gap: 32px;
        margin-bottom: 40px;
    }
    .footer-brand h4 {
        font-size: 20px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: 0.5px;
    }
    .footer-brand p {
        font-size: 13px;
        line-height: 1.8;
        color: rgba(255,255,255,0.6);
        max-width: 260px;
    }
    .footer-col h5 {
        font-size: 14px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: 0.5px;
    }
    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .footer-col li {
        margin-bottom: 9px;
    }
    .footer-col a {
        font-size: 13px;
        color: rgba(255,255,255,0.65);
        transition: color 0.2s ease;
    }
    .footer-col a:hover {
        color: var(--accent-gold);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.12);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-bottom p {
        font-size: 12px;
        color: rgba(255,255,255,0.5);
    }
    .footer-bottom .footer-domain {
        font-size: 12px;
        color: rgba(255,255,255,0.5);
    }

    /* ========== Breadcrumb (for inner pages) ========== */
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--text-muted);
        padding: 18px 0;
    }
    .breadcrumb a {
        color: var(--primary-mid);
    }
    .breadcrumb a:hover {
        color: var(--accent-gold);
    }
    .breadcrumb .sep {
        color: var(--border-default);
    }

    /* ========== Responsive ========== */
    @media (max-width: 1024px) {
        .hero .container {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .hero-content h1 {
            font-size: 28px;
        }
        .news-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .scenario-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .service-card-lg {
            grid-column: span 6;
        }
        .service-card-sm {
            grid-column: span 6;
        }
        .dual-col {
            grid-template-columns: 1fr;
        }
        .diagnosis-wrapper {
            grid-template-columns: 1fr;
        }
        .data-board {
            grid-template-columns: 1fr;
        }
        .data-board .data-visual {
            min-height: 260px;
        }
        .subscribe-band {
            grid-template-columns: 1fr;
            padding: 36px 28px;
        }
        .footer-grid {
            grid-template-columns: repeat(3, 1fr);
        }
        .footer-brand {
            grid-column: span 3;
        }
    }

    @media (max-width: 768px) {
        :root {
            --section-pad: 56px;
        }
        .site-header {
            height: 64px;
        }
        .nav-toggle {
            display: flex;
        }
        .nav-wrapper {
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--bg-white);
            flex-direction: column;
            align-items: stretch;
            gap: 0;
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            border-bottom: 1px solid var(--border-default);
            box-shadow: 0 20px 30px rgba(0,0,0,0.08);
        }
        .nav-wrapper.open {
            max-height: 420px;
        }
        .nav-list {
            flex-direction: column;
            gap: 0;
            width: 100%;
        }
        .nav-list li {
            width: 100%;
        }
        .nav-list a {
            display: block;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 16px;
        }
        .header-cta {
            padding: 14px 0;
            display: flex;
            justify-content: flex-start;
        }
        .hero {
            padding: 48px 0 56px;
        }
        .hero .container {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .hero-content h1 {
            font-size: 24px;
        }
        .hero-content .hero-sub {
            font-size: 15px;
        }
        .hero-visual .visual-frame {
            max-width: 100%;
        }
        .hero-visual .floating-badge {
            bottom: 12px;
            left: 12px;
            font-size: 11px;
            padding: 6px 12px;
        }
        .metrics-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .metric-value {
            font-size: 30px;
        }
        .section-title {
            font-size: 22px;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .scenario-grid {
            grid-template-columns: 1fr;
        }
        .steps-grid {
            grid-template-columns: 1fr;
        }
        .service-card-lg, .service-card-sm {
            grid-column: span 12;
        }
        .testimonial-scroll {
            grid-template-columns: repeat(3, 1fr);
            overflow-x: scroll;
        }
        .testimonial-card {
            min-width: 260px;
        }
        .subscribe-form {
            flex-direction: column;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .footer-brand {
            grid-column: span 2;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding-left: 18px;
            padding-right: 18px;
        }
        .hero-content h1 {
            font-size: 21px;
        }
        .hero-btns {
            flex-direction: column;
        }
        .hero-btns .btn {
            width: 100%;
        }
        .metrics-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .metric-value {
            font-size: 26px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
        }
        .footer-brand {
            grid-column: span 1;
        }
        .service-card-lg, .service-card-sm {
            padding: 22px 18px;
        }
        .diagnosis-form {
            padding: 26px 18px;
        }
        .subscribe-band {
            padding: 28px 20px;
        }
        .data-board .data-info {
            padding: 24px 20px;
        }
    }

/* roulang page: article */
:root {
        --primary-dark: #16302B;
        --primary-darker: #1E3D36;
        --primary-mid: #2E5A4E;
        --accent-gold: #C8913A;
        --accent-gold-light: #D4A24E;
        --bg-cream: #F7F5F0;
        --bg-white: #FFFFFF;
        --bg-sage: #EDF0E8;
        --text-dark: #1F2421;
        --text-muted: #5B6560;
        --border-default: #E2DED3;
        --border-light: #E6E3D9;
        --shadow-card: 0 12px 30px rgba(22,48,43,0.08);
        --shadow-hover: 0 18px 40px rgba(22,48,43,0.14);
        --radius-card: 16px;
        --radius-btn: 12px;
        --radius-badge: 999px;
        --font-sans: 'PingFang SC','Source Han Sans SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
        --font-num: 'DIN Alternate','Barlow','PingFang SC',sans-serif;
        --section-pad: 88px;
        --container-max: 1200px;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: var(--font-sans);
        font-size: 15px;
        line-height: 1.7;
        color: var(--text-dark);
        background: var(--bg-cream);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color 0.2s ease, border-color 0.2s ease;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: inherit;
    }
    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
    }
    button {
        cursor: pointer;
    }
    .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding-left: 24px;
        padding-right: 24px;
    }
    /* ========== Header / Navigation ========== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-default);
        height: 72px;
        display: flex;
        align-items: center;
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 24px;
    }
    .logo {
        font-size: 20px;
        font-weight: 700;
        color: var(--primary-dark);
        letter-spacing: 0.5px;
        flex-shrink: 0;
        white-space: nowrap;
    }
    .logo:hover {
        color: var(--accent-gold);
    }
    .nav-wrapper {
        display: flex;
        align-items: center;
        gap: 28px;
    }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 28px;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .nav-list a {
        font-size: 15px;
        font-weight: 500;
        color: var(--text-dark);
        padding: 6px 0;
        position: relative;
        white-space: nowrap;
        transition: color 0.2s ease;
    }
    .nav-list a:hover {
        color: var(--primary-mid);
    }
    .nav-list a.active {
        color: var(--accent-gold);
        font-weight: 600;
    }
    .nav-list a.active::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -2px;
        width: 100%;
        height: 2px;
        background: var(--accent-gold);
        border-radius: 2px;
    }
    .nav-list a::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -2px;
        width: 0;
        height: 2px;
        background: var(--primary-mid);
        border-radius: 2px;
        transition: width 0.25s ease;
    }
    .nav-list a:hover::after {
        width: 100%;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 24px;
        border-radius: var(--radius-btn);
        font-size: 15px;
        font-weight: 600;
        border: none;
        transition: all 0.25s ease;
        min-height: 46px;
        white-space: nowrap;
        line-height: 1.4;
        text-decoration: none;
    }
    .btn:focus-visible {
        outline: 3px solid rgba(200,145,58,0.35);
        outline-offset: 2px;
    }
    .btn-primary {
        background: var(--primary-dark);
        color: #fff;
    }
    .btn-primary:hover {
        background: var(--accent-gold);
        color: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: var(--shadow-hover);
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: var(--shadow-card);
    }
    .btn-gold {
        background: var(--accent-gold);
        color: var(--primary-dark);
    }
    .btn-gold:hover {
        background: var(--accent-gold-light);
        color: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: var(--shadow-hover);
    }
    .btn-outline {
        background: transparent;
        color: var(--primary-dark);
        border: 1.5px solid var(--primary-mid);
    }
    .btn-outline:hover {
        border-color: var(--accent-gold);
        color: var(--accent-gold);
        background: rgba(200,145,58,0.06);
    }
    .btn-sm {
        padding: 9px 18px;
        min-height: 40px;
        font-size: 14px;
        border-radius: 10px;
    }
    .header-cta {
        flex-shrink: 0;
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        padding: 8px;
        cursor: pointer;
    }
    .nav-toggle span {
        display: block;
        width: 26px;
        height: 2px;
        background: var(--primary-dark);
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    /* ========== Article Main ========== */
    .article-main {
        padding: 40px 0 72px;
    }
    .article-head-section {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 40px 44px;
        margin-bottom: 28px;
        border: 1px solid var(--border-default);
    }
    .article-meta-top {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
        margin-bottom: 18px;
    }
    .article-category-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--bg-sage);
        color: var(--primary-mid);
        padding: 6px 16px;
        border-radius: var(--radius-badge);
        font-size: 13px;
        font-weight: 600;
    }
    .article-date {
        color: var(--text-muted);
        font-size: 14px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .article-author {
        color: var(--text-muted);
        font-size: 14px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .article-h1 {
        font-size: 32px;
        line-height: 1.35;
        font-weight: 700;
        color: var(--primary-dark);
        margin: 0 0 16px;
    }
    .article-h1 {
        font-family: var(--font-sans);
    }
    /* Breadcrumb */
    .breadcrumb-section {
        margin-bottom: 28px;
        padding: 0 4px;
    }
    .breadcrumb-nav {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-wrap: wrap;
        font-size: 14px;
        color: var(--text-muted);
    }
    .breadcrumb-nav a {
        color: var(--primary-mid);
        font-weight: 500;
    }
    .breadcrumb-nav a:hover {
        color: var(--accent-gold);
    }
    .breadcrumb-sep {
        color: #B8B5A8;
    }
    .breadcrumb-current {
        color: var(--text-dark);
        font-weight: 600;
        max-width: 320px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    /* Article body */
    .article-body-section {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 44px 48px;
        margin-bottom: 28px;
        border: 1px solid var(--border-default);
    }
    .article-body-section h2 {
        font-size: 24px;
        line-height: 1.4;
        font-weight: 700;
        color: var(--primary-dark);
        margin: 28px 0 14px;
        padding-top: 8px;
    }
    .article-body-section h3 {
        font-size: 19px;
        line-height: 1.45;
        font-weight: 600;
        color: var(--primary-darker);
        margin: 24px 0 12px;
    }
    .article-body-section p {
        font-size: 15.5px;
        line-height: 1.85;
        color: var(--text-dark);
        margin-bottom: 16px;
    }
    .article-body-section ul,
    .article-body-section ol {
        padding-left: 24px;
        margin-bottom: 18px;
    }
    .article-body-section li {
        margin-bottom: 8px;
        line-height: 1.75;
    }
    .article-body-section blockquote {
        border-left: 4px solid var(--accent-gold);
        background: var(--bg-cream);
        padding: 20px 24px;
        margin: 20px 0;
        border-radius: 0 12px 12px 0;
        color: var(--text-dark);
        font-size: 15px;
        line-height: 1.8;
    }
    .article-body-section table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
        font-size: 14px;
    }
    .article-body-section table th,
    .article-body-section table td {
        border: 1px solid var(--border-default);
        padding: 12px 16px;
        text-align: left;
    }
    .article-body-section table th {
        background: var(--bg-sage);
        color: var(--primary-dark);
        font-weight: 600;
    }
    .article-body-section img {
        border-radius: 12px;
        margin: 20px 0;
        width: 100%;
        object-fit: cover;
    }
    .article-not-found {
        text-align: center;
        padding: 56px 24px;
        color: var(--text-muted);
    }
    .article-not-found h2 {
        font-size: 24px;
        color: var(--primary-dark);
        margin-bottom: 16px;
    }
    /* Key points card */
    .key-points-section {
        background: var(--bg-sage);
        border-radius: var(--radius-card);
        padding: 32px 36px;
        margin-bottom: 28px;
        border: 1px solid var(--border-light);
    }
    .key-points-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .key-points-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .key-points-list li {
        padding-left: 22px;
        position: relative;
        font-size: 15px;
        line-height: 1.7;
        color: var(--text-dark);
    }
    .key-points-list li::before {
        content: '▎';
        position: absolute;
        left: 0;
        top: 0;
        color: var(--accent-gold);
        font-weight: 700;
        font-size: 16px;
        line-height: 1.6;
    }
    /* Related posts */
    .related-section {
        margin-bottom: 28px;
    }
    .related-heading {
        font-size: 22px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 22px;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .related-heading::after {
        content: '';
        flex: 1;
        height: 1px;
        background: var(--border-default);
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
    }
    .related-card {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-default);
        overflow: hidden;
        transition: all 0.3s ease;
        display: flex;
        flex-direction: column;
    }
    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
        border-color: var(--accent-gold);
    }
    .related-card-img {
        height: 170px;
        overflow: hidden;
        border-radius: var(--radius-card) var(--radius-card) 0 0;
    }
    .related-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }
    .related-card:hover .related-card-img img {
        transform: scale(1.05);
    }
    .related-card-body {
        padding: 18px 20px 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .related-card-tag {
        font-size: 12px;
        color: var(--primary-mid);
        background: var(--bg-sage);
        padding: 4px 12px;
        border-radius: var(--radius-badge);
        display: inline-block;
        width: fit-content;
        margin-bottom: 10px;
        font-weight: 600;
    }
    .related-card-title {
        font-size: 16px;
        font-weight: 600;
        color: var(--primary-dark);
        line-height: 1.5;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .related-card-summary {
        font-size: 13.5px;
        color: var(--text-muted);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 12px;
    }
    .related-card-date {
        font-size: 12px;
        color: #9AA39D;
        margin-top: auto;
    }
    /* Disclaimer */
    .disclaimer-section {
        background: #FFFDF8;
        border: 1px solid #E8E2D0;
        border-left: 4px solid var(--accent-gold);
        border-radius: 12px;
        padding: 22px 28px;
        margin-bottom: 28px;
    }
    .disclaimer-section h3 {
        font-size: 16px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 10px;
    }
    .disclaimer-section p {
        font-size: 14px;
        line-height: 1.8;
        color: var(--text-muted);
        margin: 0;
    }
    /* CTA / return */
    .article-cta-section {
        background: var(--primary-dark);
        border-radius: var(--radius-card);
        padding: 36px 40px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 28px;
        flex-wrap: wrap;
    }
    .article-cta-info h3 {
        font-size: 20px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 6px;
    }
    .article-cta-info p {
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        margin: 0;
    }
    .article-cta-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
    }
    .btn-white-outline {
        background: transparent;
        color: #fff;
        border: 1.5px solid rgba(255,255,255,0.5);
    }
    .btn-white-outline:hover {
        border-color: var(--accent-gold-light);
        color: var(--accent-gold-light);
        background: rgba(200,145,58,0.1);
    }
    /* ========== Footer ========== */
    .site-footer {
        background: var(--primary-dark);
        color: #E8E5DA;
        padding: 56px 0 0;
        margin-top: 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr 1.4fr;
        gap: 32px;
        padding-bottom: 40px;
    }
    .footer-brand h4 {
        font-size: 20px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255,255,255,0.65);
        max-width: 280px;
    }
    .footer-col h5 {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }
    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer-col a {
        font-size: 14px;
        color: rgba(255,255,255,0.65);
        transition: color 0.2s ease;
    }
    .footer-col a:hover {
        color: var(--accent-gold-light);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.12);
        padding: 20px 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
    }
    .footer-bottom p {
        margin: 0;
        font-size: 13px;
        color: rgba(255,255,255,0.5);
    }
    .footer-domain {
        font-size: 13px;
        color: rgba(255,255,255,0.45);
        font-family: var(--font-num);
    }
    /* ========== Responsive ========== */
    @media (max-width: 1024px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr 1fr;
        }
        .footer-brand {
            grid-column: 1 / -1;
        }
        .article-body-section {
            padding: 32px 28px;
        }
        .article-head-section {
            padding: 30px 28px;
        }
        .related-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 768px) {
        .site-header {
            height: 62px;
        }
        .nav-wrapper {
            display: none;
            position: absolute;
            top: 62px;
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-default);
            padding: 20px 24px;
            flex-direction: column;
            align-items: flex-start;
            gap: 16px;
            box-shadow: var(--shadow-card);
        }
        .nav-wrapper.open {
            display: flex;
        }
        .nav-list {
            flex-direction: column;
            align-items: flex-start;
            gap: 14px;
            width: 100%;
        }
        .nav-toggle {
            display: flex;
        }
        .header-cta {
            width: 100%;
            justify-content: center;
        }
        .article-main {
            padding: 24px 0 48px;
        }
        .article-head-section {
            padding: 24px 20px;
        }
        .article-h1 {
            font-size: 24px;
            line-height: 1.4;
        }
        .article-body-section {
            padding: 24px 20px;
        }
        .article-body-section h2 {
            font-size: 20px;
        }
        .article-body-section h3 {
            font-size: 17px;
        }
        .key-points-section {
            padding: 24px 20px;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .article-cta-section {
            padding: 28px 24px;
            flex-direction: column;
            align-items: flex-start;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
            gap: 8px;
        }
    }
    @media (max-width: 520px) {
        .container {
            padding-left: 18px;
            padding-right: 18px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .article-head-section {
            padding: 20px 16px;
        }
        .article-body-section {
            padding: 20px 16px;
        }
        .article-h1 {
            font-size: 20px;
        }
        .related-card-img {
            height: 150px;
        }
        .breadcrumb-current {
            max-width: 200px;
        }
    }

/* roulang page: category1 */
:root {
            --primary-dark: #16302B;
            --primary-darker: #1E3D36;
            --primary-mid: #2E5A4E;
            --accent-gold: #C8913A;
            --accent-gold-light: #D4A24E;
            --bg-cream: #F7F5F0;
            --bg-white: #FFFFFF;
            --bg-sage: #EDF0E8;
            --text-dark: #1F2421;
            --text-muted: #5B6560;
            --border-default: #E2DED3;
            --border-light: #E6E3D9;
            --shadow-card: 0 12px 30px rgba(22,48,43,0.08);
            --shadow-hover: 0 18px 40px rgba(22,48,43,0.14);
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-badge: 999px;
            --font-sans: 'PingFang SC','Source Han Sans SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
            --font-num: 'DIN Alternate','Barlow','PingFang SC',sans-serif;
            --section-pad: 88px;
            --container-max: 1200px;
        }
        @media (max-width: 576px) {
            :root { --section-pad: 56px; }
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-cream);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: inherit;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button { cursor: pointer; }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-default);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 24px;
        }
        .logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
            white-space: nowrap;
        }
        .logo:hover { color: var(--accent-gold); }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-list a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
            transition: color 0.2s ease;
        }
        .nav-list a:hover { color: var(--primary-mid); }
        .nav-list a.active {
            color: var(--accent-gold);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 2px;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--primary-mid);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-list a:hover::after { width: 100%; }
        .nav-list a.active:hover::after { background: var(--accent-gold); }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all 0.25s ease;
            min-height: 46px;
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(200,145,58,0.35);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary-dark);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-gold);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.5);
        }
        .btn-secondary:hover {
            border-color: var(--accent-gold-light);
            color: var(--accent-gold-light);
            background: rgba(200,145,58,0.08);
        }
        .btn-gold {
            background: var(--accent-gold);
            color: var(--primary-dark);
        }
        .btn-gold:hover {
            background: var(--accent-gold-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary-dark);
            border: 1.5px solid var(--primary-mid);
        }
        .btn-outline:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            background: rgba(200,145,58,0.06);
        }
        .btn-sm {
            padding: 9px 18px;
            min-height: 40px;
            font-size: 14px;
            border-radius: 10px;
        }
        .btn-link {
            background: none;
            border: none;
            padding: 4px 0;
            color: var(--accent-gold);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
        }
        .btn-link:hover {
            gap: 10px;
            color: var(--primary-mid);
        }
        .header-cta { flex-shrink: 0; }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary-dark);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* ========== Section Base ========== */
        section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }
        .section-alt {
            background: var(--bg-sage);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-cream {
            background: var(--bg-cream);
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 36px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-gold);
            background: rgba(200,145,58,0.1);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-area {
            padding: 28px 0 0 0;
            background: var(--bg-cream);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover { color: var(--accent-gold); }
        .breadcrumb .sep { color: var(--border-default); }
        .breadcrumb .current {
            color: var(--primary-dark);
            font-weight: 600;
        }

        /* ========== Category Hero ========== */
        .category-hero {
            padding-top: 32px;
            padding-bottom: 48px;
            background: var(--bg-cream);
        }
        .category-hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--primary-dark);
            margin-bottom: 16px;
        }
        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 520px;
        }
        .category-hero .hero-visual {
            background: var(--bg-sage);
            border-radius: var(--radius-card);
            min-height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .category-hero .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        /* ========== Stats Bar ========== */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border-light);
        }
        .stat-item {
            text-align: left;
        }
        .stat-item .stat-num {
            font-family: var(--font-num);
            font-size: 36px;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.1;
            letter-spacing: -0.5px;
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ========== Solution Cards ========== */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .solution-card {
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .solution-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent-gold);
        }
        .solution-card .card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .solution-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-dark);
            line-height: 1.4;
        }
        .solution-card .risk-badge {
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            background: var(--bg-sage);
            color: var(--primary-mid);
            white-space: nowrap;
        }
        .solution-card .card-audience {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .solution-card .card-return {
            font-family: var(--font-num);
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-gold);
        }
        .solution-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 4px;
        }
        .solution-card .tag {
            font-size: 12px;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            background: rgba(22,48,43,0.06);
            color: var(--primary-dark);
            font-weight: 500;
        }
        .solution-card .card-footer {
            margin-top: auto;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .solution-card .card-footer .update-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ========== Banner ========== */
        .banner-area {
            background: var(--bg-cream);
            padding: 48px 0;
        }
        .banner-box {
            background: var(--primary-dark);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 32px;
            align-items: center;
            box-shadow: var(--shadow-hover);
            overflow: hidden;
        }
        .banner-box .banner-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .banner-box .banner-text p {
            font-size: 15px;
            color: rgba(255,255,255,0.75);
            line-height: 1.8;
            max-width: 520px;
        }
        .banner-box .banner-visual {
            background: rgba(255,255,255,0.08);
            border-radius: 12px;
            min-height: 160px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .banner-box .banner-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 12px;
        }

        /* ========== Process Steps ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .process-step {
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            text-align: center;
        }
        .process-step:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent-gold-light);
        }
        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-dark);
            color: #fff;
            font-family: var(--font-num);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .process-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 8px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            transition: color 0.2s ease;
        }
        .faq-question:hover { color: var(--primary-mid); }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-sage);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-mid);
            transition: all 0.3s ease;
        }
        .faq-item.open .faq-icon {
            background: var(--accent-gold);
            color: var(--primary-dark);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 8px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 8px 20px 8px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0;
        }

        /* ========== CTA Form ========== */
        .cta-section {
            background: var(--bg-white);
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cta-form-card {
            background: var(--bg-cream);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }
        .cta-form-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }
        .cta-form-card .form-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            height: 46px;
            padding: 10px 14px;
            border: 1px solid #D7D3C8;
            border-radius: 10px;
            background: #fff;
            font-size: 14px;
            color: var(--text-dark);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .form-group textarea {
            height: auto;
            min-height: 90px;
            resize: vertical;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--accent-gold);
            box-shadow: 0 0 0 3px rgba(200,145,58,0.18);
            outline: none;
        }
        .cta-side-info h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.5;
            margin-bottom: 16px;
        }
        .cta-side-info ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px 0;
        }
        .cta-side-info ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .cta-side-info ul li::before {
            content: '✓';
            flex-shrink: 0;
            color: var(--accent-gold);
            font-weight: 700;
            margin-top: 1px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.78);
            padding-top: 72px;
            padding-bottom: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand h4 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 300px;
        }
        .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255,255,255,0.65);
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold-light);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 0;
            flex-wrap: wrap;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            margin: 0;
        }
        .footer-domain {
            font-size: 13px;
            color: rgba(255,255,255,0.45);
            font-family: var(--font-num);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .solution-grid { grid-template-columns: repeat(2, 1fr); }
            .process-grid { grid-template-columns: repeat(3, 1fr); }
            .category-hero .container { gap: 32px; }
            .banner-box { grid-template-columns: 1fr 220px; }
            .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-wrapper {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-default);
                box-shadow: 0 12px 30px rgba(22,48,43,0.12);
                transform: translateY(-110%);
                transition: transform 0.3s ease;
                z-index: 999;
            }
            .nav-wrapper.open { transform: translateY(0); }
            .nav-list {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                width: 100%;
            }
            .nav-list a { font-size: 16px; }
            .header-cta { width: 100%; }
            .header-cta.btn { width: 100%; }
            .category-hero .container { grid-template-columns: 1fr; }
            .category-hero .hero-visual { min-height: 200px; }
            .stats-bar { grid-template-columns: repeat(3, 1fr); gap: 16px; }
            .stat-item .stat-num { font-size: 28px; }
            .solution-grid { grid-template-columns: 1fr; }
            .banner-box { grid-template-columns: 1fr; padding: 32px 24px; }
            .banner-box .banner-visual { min-height: 140px; }
            .process-grid { grid-template-columns: repeat(2, 1fr); }
            .cta-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            section { padding-top: 48px; padding-bottom: 48px; }
        }
        @media (max-width: 520px) {
            .container { padding-left: 20px; padding-right: 20px; }
            .logo { font-size: 18px; }
            .category-hero h1 { font-size: 26px; }
            .stats-bar { grid-template-columns: 1fr 1fr; gap: 20px; }
            .stat-item .stat-num { font-size: 26px; }
            .solution-grid { grid-template-columns: 1fr; }
            .process-grid { grid-template-columns: 1fr; }
            .banner-box { padding: 28px 20px; }
            .banner-box .banner-text h3 { font-size: 20px; }
            .cta-form-card { padding: 28px 20px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
        }

/* roulang page: category2 */
:root {
            --primary-dark: #16302B;
            --primary-darker: #1E3D36;
            --primary-mid: #2E5A4E;
            --accent-gold: #C8913A;
            --accent-gold-light: #D4A24E;
            --bg-cream: #F7F5F0;
            --bg-white: #FFFFFF;
            --bg-sage: #EDF0E8;
            --text-dark: #1F2421;
            --text-muted: #5B6560;
            --border-default: #E2DED3;
            --border-light: #E6E3D9;
            --shadow-card: 0 12px 30px rgba(22,48,43,0.08);
            --shadow-hover: 0 18px 40px rgba(22,48,43,0.14);
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-badge: 999px;
            --font-sans: 'PingFang SC','Source Han Sans SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
            --font-num: 'DIN Alternate','Barlow','PingFang SC',sans-serif;
            --section-pad: 88px;
            --container-max: 1200px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-cream);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        *, *::before, *::after {
            box-sizing: border-box;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease;
        }
        a:hover {
            color: var(--primary-mid);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: inherit;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            font-weight: 700;
            line-height: 1.35;
        }
        p {
            margin: 0;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-default);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 24px;
        }
        .logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
            white-space: nowrap;
            transition: color 0.2s ease;
        }
        .logo:hover {
            color: var(--accent-gold);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-list a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
            transition: color 0.2s ease;
        }
        .nav-list a:hover {
            color: var(--primary-mid);
        }
        .nav-list a.active {
            color: var(--accent-gold);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 2px;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--primary-mid);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a.active:hover::after {
            background: var(--accent-gold);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all 0.25s ease;
            min-height: 46px;
            white-space: nowrap;
            line-height: 1.4;
            text-align: center;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(200,145,58,0.35);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary-dark);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-gold);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.5);
        }
        .btn-secondary:hover {
            border-color: var(--accent-gold-light);
            color: var(--accent-gold-light);
            background: rgba(200,145,58,0.08);
        }
        .btn-gold {
            background: var(--accent-gold);
            color: var(--primary-dark);
        }
        .btn-gold:hover {
            background: var(--accent-gold-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary-dark);
            border: 1.5px solid var(--primary-mid);
        }
        .btn-outline:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            background: rgba(200,145,58,0.06);
        }
        .btn-sm {
            padding: 9px 18px;
            min-height: 40px;
            font-size: 14px;
            border-radius: 10px;
        }
        .btn-link {
            background: none;
            border: none;
            padding: 4px 0;
            color: var(--accent-gold);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease, color 0.2s ease;
            font-size: 15px;
        }
        .btn-link:hover {
            gap: 10px;
            color: var(--primary-mid);
        }
        .header-cta {
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--primary-dark);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-section {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 18px 0;
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-list a {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .breadcrumb-list a:hover {
            color: var(--accent-gold);
        }
        .breadcrumb-list .sep {
            color: var(--border-default);
        }
        .breadcrumb-list .current {
            color: var(--primary-dark);
            font-weight: 600;
        }

        /* ========== Category Hero ========== */
        .category-hero-section {
            background: var(--bg-white);
            padding: 64px 0 56px;
            border-bottom: 1px solid var(--border-light);
        }
        .category-hero-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .category-hero-left .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-sage);
            color: var(--primary-mid);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 18px;
        }
        .category-hero-left h1 {
            font-size: 36px;
            line-height: 1.3;
            color: var(--primary-dark);
            margin-bottom: 16px;
            font-weight: 700;
        }
        .category-hero-left .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-muted);
            max-width: 620px;
        }
        .category-hero-right {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 280px;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--bg-sage);
            position: relative;
        }
        .category-hero-right img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
            border-radius: var(--radius-card);
        }
        .category-hero-right .img-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(22,48,43,0.88);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            letter-spacing: 0.3px;
        }

        /* ========== Metrics Bar ========== */
        .metrics-section {
            background: var(--bg-cream);
            padding: 40px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .metric-item {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            gap: 18px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-default);
            transition: all 0.25s ease;
        }
        .metric-item:hover {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .metric-num {
            font-family: var(--font-num);
            font-size: 36px;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1;
            letter-spacing: 0.5px;
        }
        .metric-num .suffix {
            font-size: 20px;
            color: var(--accent-gold);
            margin-left: 2px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .metric-label strong {
            display: block;
            font-size: 16px;
            color: var(--text-dark);
            margin-bottom: 4px;
            font-weight: 600;
        }

        /* ========== Research Cards Section ========== */
        .research-cards-section {
            background: var(--bg-white);
            padding: var(--section-pad) 0;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .section-header h2 {
            font-size: 28px;
            color: var(--primary-dark);
            font-weight: 700;
            line-height: 1.35;
        }
        .section-header .section-sub {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 520px;
            line-height: 1.7;
        }
        .research-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .research-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-default);
            padding: 24px;
            box-shadow: 0 8px 22px rgba(22,48,43,0.05);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 14px;
            position: relative;
            overflow: hidden;
        }
        .research-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: transparent;
            transition: background 0.3s ease;
        }
        .research-card:hover {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .research-card:hover::before {
            background: var(--accent-gold);
        }
        .research-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .research-date {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.3px;
        }
        .research-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary-mid);
            background: var(--bg-sage);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            white-space: nowrap;
        }
        .research-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.5;
        }
        .research-card .research-summary {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
            flex-grow: 1;
        }
        .research-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
        }
        .research-source {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .research-source .source-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-gold);
            display: inline-block;
        }
        .research-read-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-gold);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .research-read-link:hover {
            color: var(--primary-mid);
            gap: 10px;
        }
        .research-more {
            margin-top: 36px;
            text-align: center;
        }

        /* ========== Banner Section ========== */
        .banner-section {
            background: var(--bg-cream);
            padding: var(--section-pad) 0;
        }
        .banner-box {
            background: var(--primary-dark);
            border-radius: 20px;
            overflow: hidden;
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            min-height: 340px;
            position: relative;
        }
        .banner-text {
            padding: 48px 52px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 18px;
            position: relative;
            z-index: 2;
        }
        .banner-text .banner-tag {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-gold-light);
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .banner-text h2 {
            font-size: 28px;
            color: #fff;
            font-weight: 700;
            line-height: 1.4;
        }
        .banner-text p {
            font-size: 15px;
            color: rgba(255,255,255,0.78);
            line-height: 1.8;
            max-width: 480px;
        }
        .banner-text .btn-gold {
            align-self: flex-start;
            margin-top: 6px;
        }
        .banner-image {
            position: relative;
            min-height: 340px;
            overflow: hidden;
        }
        .banner-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            top: 0;
            left: 0;
        }
        .banner-image::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(100deg, rgba(22,48,43,0.72) 0%, rgba(22,48,43,0.25) 60%, rgba(22,48,43,0.05) 100%);
            z-index: 1;
        }

        /* ========== Tag Cloud Section ========== */
        .tag-cloud-section {
            background: var(--bg-white);
            padding: var(--section-pad) 0;
            border-top: 1px solid var(--border-light);
        }
        .tag-cloud-wrapper {
            background: var(--bg-cream);
            border-radius: var(--radius-card);
            padding: 40px 44px;
            border: 1px solid var(--border-default);
        }
        .tag-cloud-wrapper .tag-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 24px;
        }
        .tag-cloud-list {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .tag-cloud-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-badge);
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            transition: all 0.25s ease;
        }
        .tag-cloud-item:hover {
            border-color: var(--accent-gold);
            background: rgba(200,145,58,0.06);
            color: var(--accent-gold);
            transform: translateY(-1px);
        }
        .tag-cloud-item .tag-count {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            background: var(--bg-sage);
            border-radius: var(--radius-badge);
            padding: 2px 8px;
            min-width: 28px;
            text-align: center;
        }

        /* ========== FAQ Section ========== */
        .faq-section {
            background: var(--bg-cream);
            padding: var(--section-pad) 0;
            border-top: 1px solid var(--border-light);
        }
        .faq-heading {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-heading h2 {
            font-size: 28px;
            color: var(--primary-dark);
            font-weight: 700;
            margin-bottom: 10px;
        }
        .faq-heading p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto;
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: 12px;
            border: 1px solid var(--border-default);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            border-color: var(--accent-gold);
        }
        .faq-item summary {
            padding: 20px 28px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: color 0.2s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--primary-mid);
        }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-sage);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 400;
            color: var(--primary-mid);
            transition: all 0.3s ease;
            line-height: 1;
        }
        .faq-item[open] summary .faq-icon {
            background: var(--accent-gold);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 28px 22px;
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-muted);
        }

        /* ========== CTA Section ========== */
        .category-cta-section {
            background: var(--bg-white);
            padding: 72px 0;
        }
        .cta-box {
            background: var(--primary-dark);
            border-radius: 20px;
            padding: 48px 52px;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-box-left h2 {
            font-size: 26px;
            color: #fff;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
        }
        .cta-box-left p {
            font-size: 15px;
            color: rgba(255,255,255,0.75);
            line-height: 1.8;
            max-width: 480px;
        }
        .cta-box-right {
            display: flex;
            flex-direction: column;
            gap: 14px;
            align-items: flex-start;
        }
        .cta-box-right .btn-gold {
            min-width: 200px;
        }
        .cta-box-right .btn-secondary {
            min-width: 200px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.8);
            padding: 64px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 48px;
        }
        .footer-brand h4 {
            font-size: 20px;
            color: #fff;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255,255,255,0.65);
            max-width: 260px;
        }
        .footer-col h5 {
            font-size: 15px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255,255,255,0.65);
            transition: color 0.2s ease;
            line-height: 1.6;
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold-light);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.12);
            flex-wrap: wrap;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        .footer-domain {
            font-size: 13px;
            color: rgba(255,255,255,0.45);
            letter-spacing: 0.3px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .research-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr;
            }
            .banner-box {
                grid-template-columns: 1fr;
                min-height: auto;
            }
            .banner-image {
                min-height: 260px;
            }
            .cta-box {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 36px 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
            }
            .nav-wrapper {
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border-default);
                padding: 20px 24px 24px;
                flex-direction: column;
                gap: 16px;
                align-items: flex-start;
                box-shadow: 0 20px 40px rgba(22,48,43,0.12);
            }
            .nav-wrapper.open {
                display: flex;
            }
            .nav-list {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                width: 100%;
            }
            .nav-list a {
                display: block;
                width: 100%;
                padding: 8px 0;
                font-size: 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .category-hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .category-hero-left h1 {
                font-size: 28px;
            }
            .category-hero-right {
                min-height: 220px;
            }
            .category-hero-right img {
                min-height: 220px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .metric-item {
                padding: 18px 20px;
            }
            .metric-num {
                font-size: 28px;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .research-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .banner-text {
                padding: 32px 28px;
            }
            .banner-text h2 {
                font-size: 22px;
            }
            .tag-cloud-wrapper {
                padding: 28px 24px;
            }
            .tag-cloud-list {
                gap: 10px;
            }
            .tag-cloud-item {
                padding: 6px 14px;
                font-size: 13px;
            }
            .faq-item summary {
                padding: 16px 20px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 20px 18px;
                font-size: 14px;
            }
            .cta-box {
                padding: 32px 24px;
                border-radius: 16px;
            }
            .cta-box-left h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .logo {
                font-size: 18px;
            }
            .category-hero-section {
                padding: 40px 0 36px;
            }
            .category-hero-left h1 {
                font-size: 24px;
            }
            .category-hero-left .hero-desc {
                font-size: 15px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .metric-item {
                padding: 16px 18px;
                gap: 14px;
            }
            .metric-num {
                font-size: 26px;
            }
            .research-card {
                padding: 18px;
            }
            .research-card h3 {
                font-size: 17px;
            }
            .banner-text {
                padding: 24px 20px;
            }
            .banner-text h2 {
                font-size: 20px;
            }
            .tag-cloud-wrapper {
                padding: 20px 18px;
            }
            .faq-item summary {
                padding: 14px 16px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px;
            }
            .cta-box {
                padding: 24px 18px;
                border-radius: 14px;
            }
            .cta-box-left h2 {
                font-size: 20px;
            }
            .cta-box-right .btn {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
        }

/* roulang page: category3 */
:root {
            --primary-dark: #16302B;
            --primary-darker: #1E3D36;
            --primary-mid: #2E5A4E;
            --accent-gold: #C8913A;
            --accent-gold-light: #D4A24E;
            --bg-cream: #F7F5F0;
            --bg-white: #FFFFFF;
            --bg-sage: #EDF0E8;
            --text-dark: #1F2421;
            --text-muted: #5B6560;
            --border-default: #E2DED3;
            --border-light: #E6E3D9;
            --shadow-card: 0 12px 30px rgba(22,48,43,0.08);
            --shadow-hover: 0 18px 40px rgba(22,48,43,0.14);
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-badge: 999px;
            --font-sans: 'PingFang SC','Source Han Sans SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
            --font-num: 'DIN Alternate','Barlow','PingFang SC',sans-serif;
            --section-pad: 88px;
            --container-max: 1200px;
        }
        :root {
            --section-pad: 56px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-cream);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease;
        }
        a:hover {
            color: var(--accent-gold);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: inherit;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-default);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 24px;
        }
        .logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
            white-space: nowrap;
        }
        .logo:hover {
            color: var(--accent-gold);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-list a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
            transition: color 0.2s ease;
        }
        .nav-list a:hover {
            color: var(--primary-mid);
        }
        .nav-list a.active {
            color: var(--accent-gold);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 2px;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--primary-mid);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a.active:hover::after {
            background: var(--accent-gold);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all 0.25s ease;
            min-height: 46px;
            white-space: nowrap;
            line-height: 1.4;
            cursor: pointer;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(200,145,58,0.35);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary-dark);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-gold);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.5);
        }
        .btn-secondary:hover {
            border-color: var(--accent-gold-light);
            color: var(--accent-gold-light);
            background: rgba(200,145,58,0.08);
        }
        .btn-gold {
            background: var(--accent-gold);
            color: var(--primary-dark);
        }
        .btn-gold:hover {
            background: var(--accent-gold-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary-dark);
            border: 1.5px solid var(--primary-mid);
        }
        .btn-outline:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            background: rgba(200,145,58,0.06);
        }
        .btn-sm {
            padding: 9px 18px;
            min-height: 40px;
            font-size: 14px;
            border-radius: 10px;
        }
        .btn-link {
            background: none;
            border: none;
            padding: 4px 0;
            color: var(--accent-gold);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
            cursor: pointer;
        }
        .btn-link:hover {
            gap: 10px;
            color: var(--primary-mid);
        }
        .header-cta {
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--primary-dark);
            border-radius: 2px;
            transition: all 0.25s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* ========== Sections ========== */
        section {
            padding: var(--section-pad) 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 26px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--primary-dark);
            margin: 0 0 10px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto;
        }
        .bg-white-section {
            background: var(--bg-white);
        }
        .bg-sage-section {
            background: var(--bg-sage);
        }
        .bg-cream-section {
            background: var(--bg-cream);
        }
        /* Page Hero / breadcrumb */
        .page-hero {
            background: var(--primary-dark);
            color: #fff;
            padding: 56px 0 56px;
            border-bottom: 4px solid var(--accent-gold);
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 14px;
        }
        .breadcrumb-custom a {
            color: var(--accent-gold-light);
        }
        .breadcrumb-custom a:hover {
            color: #fff;
        }
        .breadcrumb-custom span.divider {
            color: rgba(255,255,255,0.4);
        }
        .page-hero h1 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            margin: 0 0 12px;
            color: #fff;
        }
        .page-hero .hero-sub {
            font-size: 16px;
            color: rgba(255,255,255,0.85);
            max-width: 720px;
            line-height: 1.7;
            margin: 0;
        }
        /* Category intro metrics */
        .category-intro-grid {
            display: grid;
            grid-template-columns: 1.2fr 2fr;
            gap: 40px;
            align-items: center;
        }
        .category-intro-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .category-intro-text p {
            color: var(--text-muted);
            margin: 0;
        }
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .metric-block {
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }
        .metric-number {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }
        /* Service/Course cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 22px 20px;
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent-gold);
        }
        .service-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 16px;
        }
        .service-card h3 {
            font-size: 18px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--primary-dark);
            margin: 0 0 8px;
        }
        .service-card .status-badge {
            display: inline-block;
            padding: 3px 10px;
            background: var(--bg-sage);
            color: var(--primary-mid);
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .service-card .status-badge.live {
            background: rgba(200,145,58,0.18);
            color: var(--accent-gold);
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 14px;
            margin: 0 0 12px;
            flex: 1;
        }
        .service-meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .service-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .service-card .btn {
            width: 100%;
        }
        .list-footer {
            text-align: center;
            margin-top: 40px;
        }
        /* Banner */
        .banner-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--primary-darker);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }
        .banner-split .banner-content {
            padding: 48px 40px;
            color: #fff;
        }
        .banner-split .banner-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .banner-split .banner-content p {
            color: rgba(255,255,255,0.85);
            margin-bottom: 20px;
        }
        .banner-split .banner-image {
            height: 100%;
            min-height: 280px;
        }
        .banner-split .banner-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }
        /* Steps */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .step-item {
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-card);
            padding: 24px 18px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all 0.2s ease;
        }
        .step-item:hover {
            border-color: var(--accent-gold);
            transform: translateY(-3px);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-dark);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 12px;
        }
        .step-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            margin: 0 0 6px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-default);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }
        .faq-item:hover {
            border-color: var(--accent-gold);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            color: var(--primary-dark);
            font-size: 16px;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary-mid);
        }
        .faq-icon {
            flex-shrink: 0;
            margin-left: 12px;
            font-size: 24px;
            font-weight: 400;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 22px;
            color: var(--text-muted);
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            padding-bottom: 20px;
        }
        /* CTA form */
        .cta-form-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-form-box {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 36px 30px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-default);
        }
        .cta-form-box h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }
        .cta-form-box p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .form-control-custom, .form-select-custom {
            width: 100%;
            min-height: 46px;
            padding: 8px 14px;
            border: 1px solid #D7D3C8;
            border-radius: 10px;
            background: #fff;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .form-control-custom:focus, .form-select-custom:focus {
            border-color: var(--accent-gold);
            outline: none;
            box-shadow: 0 0 0 3px rgba(200,145,58,0.18);
        }
        .cta-side {
            color: var(--primary-dark);
        }
        .cta-side h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-side p {
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .cta-side ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }
        .cta-side ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 15px;
        }
        .cta-side ul li::before {
            content: '✓ ';
            color: var(--accent-gold);
            font-weight: 700;
            margin-right: 6px;
        }
        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand h4 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
        }
        .footer-domain {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-wrapper {
                position: fixed;
                top: 72px;
                right: 0;
                width: min(80vw, 360px);
                height: auto;
                background: var(--bg-white);
                box-shadow: -10px 20px 30px rgba(22,48,43,0.1);
                border-left: 1px solid var(--border-default);
                border-bottom: 1px solid var(--border-default);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 16px;
                transform: translateX(110%);
                transition: transform 0.3s ease;
                z-index: 999;
                display: flex;
            }
            .nav-wrapper.open {
                transform: translateX(0);
            }
            .nav-list {
                flex-direction: column;
                gap: 18px;
                width: 100%;
            }
            .nav-list a {
                font-size: 16px;
                display: block;
                width: 100%;
            }
            .header-cta {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .category-intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .banner-split {
                grid-template-columns: 1fr;
            }
            .cta-form-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 576px) {
            :root {
                --section-pad: 48px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .step-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .banner-split .banner-content {
                padding: 28px 20px;
            }
            .banner-split .banner-image {
                min-height: 200px;
            }
            .banner-split .banner-image img {
                min-height: 200px;
            }
            .section-head h2 {
                font-size: 22px;
            }
        }