/* roulang page: index */
/* ========== DESIGN TOKENS ========== */
    :root {
        --clr-primary: #0b1a2f;
        --clr-primary-light: #132a4a;
        --clr-accent: #d4a843;
        --clr-accent-hover: #e8c15a;
        --clr-accent-light: #f5e6c8;
        --clr-bg: #f8f9fc;
        --clr-bg-alt: #ffffff;
        --clr-bg-dark: #0b1a2f;
        --clr-text: #1a2332;
        --clr-text-light: #5a6a7e;
        --clr-text-white: #f0f2f5;
        --clr-border: #e2e6ed;
        --clr-card-bg: #ffffff;
        --clr-card-shadow: 0 8px 28px rgba(11, 26, 47, 0.08);
        --clr-card-shadow-hover: 0 16px 40px rgba(11, 26, 47, 0.14);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 22px;
        --radius-xl: 32px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
        --shadow-md: 0 6px 20px rgba(0,0,0,0.06);
        --shadow-lg: 0 14px 40px rgba(0,0,0,0.08);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --space-xs: 8px;
        --space-sm: 16px;
        --space-md: 32px;
        --space-lg: 56px;
        --space-xl: 80px;
        --max-w: 1200px;
        --header-h: 72px;
    }

    /* ========== RESET ========== */
    *, *::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: 16px;
        line-height: 1.7;
        color: var(--clr-text);
        background: var(--clr-bg);
        -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: color 0.25s; }
    a:hover { color: var(--clr-accent); }
    button, input, textarea { font-family: inherit; font-size: 1rem; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--clr-primary); }

    /* ========== CONTAINER ========== */
    .container {
        max-width: var(--max-w);
        margin: 0 auto;
        padding: 0 var(--space-sm);
    }

    /* ========== HEADER / NAV ========== */
    header {
        position: fixed;
        top: 0; left: 0; right: 0;
        z-index: 1000;
        height: var(--header-h);
        background: rgba(11, 26, 47, 0.92);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid rgba(212, 168, 67, 0.18);
        transition: background 0.3s;
    }
    header.scrolled {
        background: rgba(11, 26, 47, 0.98);
    }
    .header-inner {
        max-width: var(--max-w);
        margin: 0 auto;
        padding: 0 var(--space-sm);
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }
    .nav-left, .nav-right {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-left { margin-right: auto; }
    .nav-right { margin-left: auto; }
    .nav-center {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
    .site-logo {
        font-size: 1.42rem;
        font-weight: 700;
        letter-spacing: 0.02em;
        color: var(--clr-text-white);
        background: linear-gradient(135deg, #d4a843, #f5d88a);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        white-space: nowrap;
    }
    .site-logo span {
        font-weight: 300;
        -webkit-text-fill-color: rgba(240,242,245,0.5);
    }
    .nav-list {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .nav-list a {
        display: block;
        padding: 8px 18px;
        font-size: 0.92rem;
        font-weight: 500;
        color: rgba(240,242,245,0.78);
        border-radius: var(--radius-sm);
        transition: background 0.25s, color 0.25s;
        letter-spacing: 0.01em;
    }
    .nav-list a:hover {
        background: rgba(212, 168, 67, 0.12);
        color: var(--clr-accent);
    }
    .nav-list a.active {
        background: rgba(212, 168, 67, 0.16);
        color: var(--clr-accent);
    }
    .nav-toggle {
        display: none;
        background: none;
        border: none;
        color: var(--clr-text-white);
        font-size: 1.6rem;
        cursor: pointer;
        padding: 4px 8px;
    }
    .mobile-menu {
        display: none;
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: rgba(11, 26, 47, 0.98);
        backdrop-filter: blur(14px);
        padding: var(--space-sm) var(--space-md);
        border-bottom: 1px solid rgba(212,168,67,0.15);
        z-index: 999;
        flex-direction: column;
        gap: 6px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a {
        padding: 12px 16px;
        color: rgba(240,242,245,0.78);
        font-size: 1rem;
        font-weight: 500;
        border-radius: var(--radius-sm);
        transition: background 0.2s, color 0.2s;
    }
    .mobile-menu a:hover,
    .mobile-menu a.active {
        background: rgba(212,168,67,0.12);
        color: var(--clr-accent);
    }

    /* ========== HERO ========== */
    .hero {
        margin-top: var(--header-h);
        min-height: 88vh;
        display: flex;
        align-items: center;
        position: relative;
        background: var(--clr-bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11,26,47,0.88) 30%, rgba(11,26,47,0.55) 70%, rgba(11,26,47,0.30) 100%);
        z-index: 1;
    }
    .hero .container {
        position: relative;
        z-index: 2;
        text-align: center;
        padding: var(--space-lg) var(--space-sm);
        max-width: 850px;
    }
    .hero-badge {
        display: inline-block;
        background: rgba(212,168,67,0.18);
        color: var(--clr-accent);
        font-size: 0.85rem;
        font-weight: 600;
        padding: 6px 22px;
        border-radius: 50px;
        letter-spacing: 0.04em;
        margin-bottom: var(--space-sm);
        border: 1px solid rgba(212,168,67,0.25);
        backdrop-filter: blur(4px);
    }
    .hero h1 {
        font-size: clamp(2.2rem, 6vw, 3.8rem);
        font-weight: 800;
        color: var(--clr-text-white);
        line-height: 1.2;
        margin-bottom: var(--space-sm);
    }
    .hero h1 em {
        font-style: normal;
        background: linear-gradient(135deg, #d4a843, #f5d88a);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero p {
        font-size: 1.12rem;
        color: rgba(240,242,245,0.78);
        max-width: 640px;
        margin: 0 auto var(--space-md);
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-sm);
    }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 34px;
        font-weight: 600;
        font-size: 1rem;
        border-radius: 50px;
        border: none;
        cursor: pointer;
        transition: all 0.3s ease;
        letter-spacing: 0.02em;
    }
    .btn-primary {
        background: linear-gradient(135deg, #d4a843, #e8c15a);
        color: #0b1a2f;
        box-shadow: 0 4px 16px rgba(212,168,67,0.30);
    }
    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 10px 32px rgba(212,168,67,0.40);
        color: #0b1a2f;
    }
    .btn-secondary {
        background: rgba(255,255,255,0.08);
        color: var(--clr-text-white);
        border: 1px solid rgba(255,255,255,0.20);
        backdrop-filter: blur(4px);
    }
    .btn-secondary:hover {
        background: rgba(255,255,255,0.16);
        color: var(--clr-text-white);
        transform: translateY(-3px);
    }
    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-md) var(--space-lg);
        margin-top: var(--space-lg);
        padding-top: var(--space-md);
        border-top: 1px solid rgba(255,255,255,0.08);
    }
    .hero-stat-item {
        text-align: center;
    }
    .hero-stat-item .num {
        font-size: 1.8rem;
        font-weight: 800;
        color: var(--clr-accent);
        line-height: 1.2;
    }
    .hero-stat-item .label {
        font-size: 0.85rem;
        color: rgba(240,242,245,0.55);
        margin-top: 4px;
    }

    /* ========== SECTIONS ========== */
    section {
        padding: var(--space-xl) 0;
    }
    .section-title {
        text-align: center;
        margin-bottom: var(--space-lg);
    }
    .section-title h2 {
        font-size: clamp(1.6rem, 3.6vw, 2.4rem);
        font-weight: 700;
        color: var(--clr-primary);
        margin-bottom: 12px;
    }
    .section-title p {
        font-size: 1.02rem;
        color: var(--clr-text-light);
        max-width: 600px;
        margin: 0 auto;
    }
    .section-subtitle {
        display: inline-block;
        font-size: 0.82rem;
        font-weight: 600;
        color: var(--clr-accent);
        letter-spacing: 0.06em;
        text-transform: uppercase;
        margin-bottom: 8px;
    }
    .bg-alt {
        background: var(--clr-bg-alt);
    }
    .bg-dark {
        background: var(--clr-bg-dark);
        color: var(--clr-text-white);
    }
    .bg-dark .section-title h2 { color: var(--clr-text-white); }
    .bg-dark .section-title p { color: rgba(240,242,245,0.65); }

    /* ========== CARDS GRID ========== */
    .grid-3 {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .grid-2 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
    .card {
        background: var(--clr-card-bg);
        border-radius: var(--radius-md);
        box-shadow: var(--clr-card-shadow);
        padding: 28px 24px;
        transition: all 0.35s ease;
        border: 1px solid var(--clr-border);
    }
    .card:hover {
        transform: translateY(-6px);
        box-shadow: var(--clr-card-shadow-hover);
    }
    .card-icon {
        width: 52px;
        height: 52px;
        border-radius: var(--radius-sm);
        background: var(--clr-accent-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        color: var(--clr-accent);
        margin-bottom: var(--space-sm);
    }
    .card h3 {
        font-size: 1.15rem;
        margin-bottom: 10px;
        color: var(--clr-primary);
    }
    .card p {
        font-size: 0.92rem;
        color: var(--clr-text-light);
        line-height: 1.7;
    }
    .card .tag {
        display: inline-block;
        font-size: 0.75rem;
        font-weight: 600;
        padding: 2px 14px;
        border-radius: 50px;
        background: var(--clr-accent-light);
        color: var(--clr-accent);
        margin-top: 10px;
    }

    /* ========== CATEGORY CARDS ========== */
    .cat-card {
        background: var(--clr-card-bg);
        border-radius: var(--radius-md);
        box-shadow: var(--clr-card-shadow);
        overflow: hidden;
        transition: all 0.35s ease;
        border: 1px solid var(--clr-border);
        display: flex;
        flex-direction: column;
    }
    .cat-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--clr-card-shadow-hover);
    }
    .cat-card figure {
        height: 180px;
        overflow: hidden;
        background: #eef1f6;
    }
    .cat-card figure img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .cat-card:hover figure img {
        transform: scale(1.06);
    }
    .cat-card-body {
        padding: 20px 22px 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .cat-card-body h3 {
        font-size: 1.08rem;
        margin-bottom: 8px;
    }
    .cat-card-body p {
        font-size: 0.88rem;
        color: var(--clr-text-light);
        line-height: 1.6;
        flex: 1;
    }
    .cat-card-body .btn-link {
        align-self: flex-start;
        margin-top: 14px;
        font-weight: 600;
        font-size: 0.9rem;
        color: var(--clr-accent);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: gap 0.25s;
    }
    .cat-card-body .btn-link:hover { gap: 12px; }

    /* ========== LIST / POST ITEMS ========== */
    .post-list {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }
    .post-item {
        display: flex;
        align-items: flex-start;
        gap: 20px;
        padding: 20px 24px;
        background: var(--clr-card-bg);
        border-radius: var(--radius-md);
        box-shadow: var(--clr-card-shadow);
        border: 1px solid var(--clr-border);
        transition: all 0.3s ease;
    }
    .post-item:hover {
        transform: translateX(4px);
        box-shadow: var(--clr-card-shadow-hover);
    }
    .post-item .thumb {
        width: 110px;
        height: 80px;
        border-radius: var(--radius-sm);
        background: #eef1f6;
        flex-shrink: 0;
        overflow: hidden;
    }
    .post-item .thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .post-item .info { flex: 1; min-width: 0; }
    .post-item .info h4 {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--clr-primary);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .post-item .info h4 a { color: inherit; }
    .post-item .info h4 a:hover { color: var(--clr-accent); }
    .post-item .meta {
        font-size: 0.8rem;
        color: var(--clr-text-light);
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }
    .post-item .meta span { display: inline-flex; align-items: center; gap: 4px; }
    .post-item .meta .cat {
        background: var(--clr-accent-light);
        color: var(--clr-accent);
        padding: 0 12px;
        border-radius: 50px;
        font-weight: 500;
    }
    .empty-msg {
        text-align: center;
        padding: 40px 20px;
        color: var(--clr-text-light);
        font-size: 1rem;
        background: var(--clr-card-bg);
        border-radius: var(--radius-md);
        border: 1px dashed var(--clr-border);
    }

    /* ========== FEATURES / ICON GRID ========== */
    .feature-card {
        text-align: center;
        padding: 32px 20px;
        background: var(--clr-card-bg);
        border-radius: var(--radius-md);
        box-shadow: var(--clr-card-shadow);
        border: 1px solid var(--clr-border);
        transition: all 0.35s ease;
    }
    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--clr-card-shadow-hover);
    }
    .feature-card .f-icon {
        font-size: 2.4rem;
        width: 72px;
        height: 72px;
        border-radius: 50%;
        background: var(--clr-accent-light);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 18px;
        color: var(--clr-accent);
    }
    .feature-card h3 {
        font-size: 1.05rem;
        margin-bottom: 10px;
    }
    .feature-card p {
        font-size: 0.88rem;
        color: var(--clr-text-light);
    }

    /* ========== TIMELINE / FLOW ========== */
    .flow-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        counter-reset: step;
    }
    .flow-step {
        text-align: center;
        position: relative;
        padding: 28px 16px;
        background: var(--clr-card-bg);
        border-radius: var(--radius-md);
        box-shadow: var(--clr-card-shadow);
        border: 1px solid var(--clr-border);
        transition: all 0.3s ease;
    }
    .flow-step:hover { transform: translateY(-4px); }
    .flow-step::before {
        counter-increment: step;
        content: "0" counter(step);
        position: absolute;
        top: 12px;
        right: 18px;
        font-size: 2.8rem;
        font-weight: 800;
        color: rgba(212,168,67,0.10);
        line-height: 1;
    }
    .flow-step .step-icon {
        font-size: 2rem;
        margin-bottom: 12px;
        color: var(--clr-accent);
    }
    .flow-step h4 {
        font-size: 1rem;
        margin-bottom: 6px;
    }
    .flow-step p {
        font-size: 0.85rem;
        color: var(--clr-text-light);
    }

    /* ========== FAQ ========== */
    .faq-list {
        max-width: 820px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--clr-card-bg);
        border-radius: var(--radius-sm);
        border: 1px solid var(--clr-border);
        overflow: hidden;
        transition: box-shadow 0.3s;
    }
    .faq-item:hover { box-shadow: var(--shadow-sm); }
    .faq-q {
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: none;
        border: none;
        width: 100%;
        text-align: left;
        color: var(--clr-primary);
        transition: background 0.2s;
    }
    .faq-q:hover { background: rgba(212,168,67,0.04); }
    .faq-q .arrow {
        font-size: 1.2rem;
        transition: transform 0.3s;
        color: var(--clr-accent);
    }
    .faq-item.open .faq-q .arrow { transform: rotate(180deg); }
    .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 24px;
        color: var(--clr-text-light);
        font-size: 0.92rem;
        line-height: 1.7;
    }
    .faq-item.open .faq-a {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    /* ========== CTA ========== */
    .cta-section {
        background: var(--clr-bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        position: relative;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11,26,47,0.88) 20%, rgba(11,26,47,0.65) 80%);
    }
    .cta-section .container {
        position: relative;
        z-index: 2;
        text-align: center;
    }
    .cta-section h2 {
        color: var(--clr-text-white);
        font-size: clamp(1.6rem, 3.2vw, 2.2rem);
        margin-bottom: 16px;
    }
    .cta-section p {
        color: rgba(240,242,245,0.7);
        max-width: 560px;
        margin: 0 auto var(--space-md);
        font-size: 1.02rem;
    }
    .cta-section .btn-primary {
        font-size: 1.06rem;
        padding: 16px 44px;
    }

    /* ========== FOOTER ========== */
    footer {
        background: #071220;
        color: rgba(240,242,245,0.65);
        padding: var(--space-lg) 0 var(--space-md);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 36px;
        margin-bottom: var(--space-md);
    }
    .footer-brand .site-logo {
        font-size: 1.2rem;
        display: inline-block;
        margin-bottom: 12px;
    }
    .footer-brand p {
        font-size: 0.88rem;
        line-height: 1.7;
        max-width: 320px;
    }
    footer h4 {
        font-size: 0.95rem;
        color: var(--clr-text-white);
        margin-bottom: 14px;
        font-weight: 600;
    }
    footer ul li { margin-bottom: 8px; }
    footer ul a {
        font-size: 0.88rem;
        color: rgba(240,242,245,0.55);
        transition: color 0.25s;
    }
    footer ul a:hover { color: var(--clr-accent); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: var(--space-sm);
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
        font-size: 0.82rem;
        color: rgba(240,242,245,0.40);
    }

    /* ========== RESPONSIVE ========== */
    @media (max-width: 1024px) {
        .grid-3 { grid-template-columns: repeat(2, 1fr); }
        .flow-steps { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 820px) {
        .nav-list { display: none; }
        .nav-toggle { display: block; }
        .hero { min-height: 70vh; }
        .hero h1 { font-size: 2rem; }
        .hero p { font-size: 0.98rem; }
        .flow-steps { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 640px) {
        :root { --space-xl: 48px; --space-lg: 36px; }
        .grid-3, .grid-2 { grid-template-columns: 1fr; }
        .flow-steps { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; }
        .hero-stats { flex-direction: column; gap: 16px; }
        .post-item { flex-direction: column; }
        .post-item .thumb { width: 100%; height: 140px; }
        .hero h1 { font-size: 1.7rem; }
        .hero-actions { flex-direction: column; align-items: center; }
        .btn { width: 100%; justify-content: center; }
        section { padding: var(--space-lg) 0; }
        .cat-card figure { height: 140px; }
        .header-inner { padding: 0 12px; }
        .site-logo { font-size: 1.1rem; }
    }
    @media (max-width: 480px) {
        .hero { min-height: 60vh; }
        .hero h1 { font-size: 1.4rem; }
        .hero-stat-item .num { font-size: 1.4rem; }
    }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1a2a6c;
        --primary-light: #2d4a8e;
        --primary-dark: #0f1a47;
        --accent: #e6a817;
        --accent-light: #f0c44a;
        --accent-dark: #c48c0e;
        --bg: #f8f9fc;
        --bg-alt: #eef0f6;
        --bg-dark: #0f1a2e;
        --text: #1a1a2e;
        --text-light: #5a5a7a;
        --text-white: #ffffff;
        --border: #d6dae8;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 20px rgba(26, 42, 108, 0.08);
        --shadow-hover: 0 12px 40px rgba(26, 42, 108, 0.18);
        --shadow-lg: 0 20px 60px rgba(26, 42, 108, 0.12);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --max-width: 1200px;
        --header-h: 72px;
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
    }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, textarea { font-family: inherit; font-size: inherit; }
    ul { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary-dark); }

    /* ===== Container ===== */
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header / Nav ===== */
    #header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: var(--header-h);
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        z-index: 1000;
        transition: box-shadow var(--transition);
    }
    #header.scrolled { box-shadow: 0 4px 30px rgba(26,42,108,0.08); }
    .header-inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
    }
    .nav-left, .nav-right { display: flex; align-items: center; gap: 8px; flex: 1; }
    .nav-left { justify-content: flex-start; }
    .nav-right { justify-content: flex-end; }
    .nav-center { flex-shrink: 0; }
    .site-logo {
        font-size: 22px;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.5px;
        white-space: nowrap;
        transition: opacity var(--transition);
    }
    .site-logo:hover { opacity: 0.85; color: var(--primary); }
    .site-logo span { color: var(--accent); font-weight: 700; }
    .nav-list { display: flex; align-items: center; gap: 4px; }
    .nav-list a {
        display: inline-block;
        padding: 6px 16px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-light);
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        white-space: nowrap;
    }
    .nav-list a:hover { color: var(--primary); background: var(--bg-alt); }
    .nav-list a.active {
        color: var(--primary);
        background: rgba(26,42,108,0.08);
        font-weight: 600;
    }
    .nav-toggle {
        display: none;
        background: none;
        border: none;
        font-size: 28px;
        color: var(--primary);
        cursor: pointer;
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        transition: background var(--transition);
    }
    .nav-toggle:hover { background: var(--bg-alt); }

    /* ===== Mobile Nav ===== */
    .mobile-nav {
        display: none;
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
        z-index: 999;
        padding: 16px 24px;
        flex-direction: column;
        gap: 8px;
        transform: translateY(-16px);
        opacity: 0;
        transition: all 0.35s ease;
        pointer-events: none;
    }
    .mobile-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .mobile-nav a {
        display: block;
        padding: 12px 16px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text-light);
        border-radius: var(--radius-sm);
        transition: all var(--transition);
    }
    .mobile-nav a:hover { background: var(--bg-alt); color: var(--primary); }
    .mobile-nav a.active { color: var(--primary); background: rgba(26,42,108,0.08); font-weight: 600; }

    /* ===== Article Hero ===== */
    .article-hero {
        padding: 120px 0 60px;
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
        position: relative;
        overflow: hidden;
    }
    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.15;
        mix-blend-mode: overlay;
    }
    .article-hero .container { position: relative; z-index: 1; }
    .article-hero .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        margin-bottom: 24px;
    }
    .article-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
    .article-hero .breadcrumb a:hover { color: var(--accent); }
    .article-hero .breadcrumb span { color: var(--accent-light); }
    .article-hero h1 {
        font-size: 36px;
        color: var(--text-white);
        max-width: 840px;
        margin-bottom: 16px;
        line-height: 1.3;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 16px 24px;
        align-items: center;
        color: rgba(255,255,255,0.75);
        font-size: 14px;
    }
    .article-meta .badge {
        display: inline-block;
        padding: 4px 14px;
        background: var(--accent);
        color: var(--primary-dark);
        border-radius: 20px;
        font-size: 12px;
        font-weight: 700;
        letter-spacing: 0.3px;
    }
    .article-meta .date { display: flex; align-items: center; gap: 6px; }
    .article-meta .date svg { width: 16px; height: 16px; fill: currentColor; }

    /* ===== Article Body ===== */
    .article-section {
        padding: 60px 0 80px;
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
        align-items: start;
    }
    .article-main {
        background: var(--text-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 40px;
    }
    .article-main .content {
        font-size: 16px;
        line-height: 1.9;
        color: var(--text);
    }
    .article-main .content p { margin-bottom: 20px; }
    .article-main .content h2, .article-main .content h3 {
        margin-top: 36px;
        margin-bottom: 16px;
        color: var(--primary-dark);
    }
    .article-main .content h2 { font-size: 24px; }
    .article-main .content h3 { font-size: 20px; }
    .article-main .content ul, .article-main .content ol {
        margin-bottom: 20px;
        padding-left: 24px;
    }
    .article-main .content ul li { list-style: disc; margin-bottom: 8px; }
    .article-main .content ol li { list-style: decimal; margin-bottom: 8px; }
    .article-main .content img {
        border-radius: var(--radius-sm);
        margin: 24px 0;
        box-shadow: var(--shadow);
    }
    .article-main .content blockquote {
        border-left: 4px solid var(--accent);
        background: var(--bg-alt);
        padding: 16px 24px;
        margin: 24px 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-main .content a { color: var(--accent-dark); font-weight: 600; text-decoration: underline; }
    .article-main .content a:hover { color: var(--primary); }
    .article-notfound {
        text-align: center;
        padding: 60px 20px;
    }
    .article-notfound h2 { font-size: 28px; color: var(--text-light); margin-bottom: 16px; }
    .article-notfound p { color: var(--text-light); margin-bottom: 24px; }
    .article-notfound .btn { display: inline-block; }

    /* ===== Sidebar ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }
    .sidebar-card {
        background: var(--text-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 28px;
    }
    .sidebar-card h3 {
        font-size: 18px;
        margin-bottom: 16px;
        padding-bottom: 12px;
        border-bottom: 2px solid var(--accent);
        display: inline-block;
    }
    .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
    .sidebar-list a {
        display: flex;
        gap: 12px;
        align-items: flex-start;
        padding: 10px 0;
        border-bottom: 1px solid var(--bg-alt);
        transition: all var(--transition);
    }
    .sidebar-list a:last-child { border-bottom: none; }
    .sidebar-list a:hover { padding-left: 8px; }
    .sidebar-list .thumb {
        width: 72px;
        height: 54px;
        border-radius: 6px;
        background: var(--bg-alt);
        flex-shrink: 0;
        overflow: hidden;
    }
    .sidebar-list .thumb img { width: 100%; height: 100%; object-fit: cover; }
    .sidebar-list .info { flex: 1; min-width: 0; }
    .sidebar-list .info .title {
        font-size: 14px;
        font-weight: 600;
        color: var(--text);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        line-height: 1.4;
    }
    .sidebar-list .info .meta {
        font-size: 12px;
        color: var(--text-light);
        margin-top: 4px;
    }
    .sidebar-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .sidebar-tags a {
        display: inline-block;
        padding: 6px 14px;
        background: var(--bg-alt);
        border-radius: 20px;
        font-size: 13px;
        color: var(--text-light);
        transition: all var(--transition);
    }
    .sidebar-tags a:hover { background: var(--primary); color: var(--text-white); }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        color: var(--text-white);
        padding: 32px 28px;
        text-align: center;
        border-radius: var(--radius);
    }
    .sidebar-cta h4 { color: var(--text-white); font-size: 20px; margin-bottom: 8px; }
    .sidebar-cta p { font-size: 14px; opacity: 0.85; margin-bottom: 20px; }
    .sidebar-cta .btn {
        background: var(--accent);
        color: var(--primary-dark);
        padding: 10px 28px;
        border-radius: 30px;
        font-weight: 700;
        font-size: 15px;
        transition: all var(--transition);
        display: inline-block;
    }
    .sidebar-cta .btn:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(230,168,23,0.35); }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 15px;
        border: none;
        cursor: pointer;
        transition: all var(--transition);
        text-decoration: none;
        background: var(--primary);
        color: var(--text-white);
    }
    .btn:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-hover); color: var(--text-white); }
    .btn-accent { background: var(--accent); color: var(--primary-dark); }
    .btn-accent:hover { background: var(--accent-light); color: var(--primary-dark); }
    .btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
    .btn-outline:hover { background: var(--primary); color: var(--text-white); }
    .btn-sm { padding: 8px 20px; font-size: 13px; }

    /* ===== CTA ===== */
    .article-cta {
        padding: 60px 0;
        background: var(--bg-dark);
        color: var(--text-white);
        text-align: center;
    }
    .article-cta h2 { color: var(--text-white); font-size: 28px; margin-bottom: 12px; }
    .article-cta p { color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto 28px; font-size: 16px; }
    .article-cta .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

    /* ===== Footer ===== */
    footer {
        background: var(--bg-dark);
        color: rgba(255,255,255,0.8);
        padding: 60px 0 30px;
        border-top: 1px solid rgba(255,255,255,0.06);
    }
    footer .site-logo { color: var(--text-white); font-size: 22px; margin-bottom: 12px; display: inline-block; }
    footer .site-logo span { color: var(--accent); }
    footer p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.8fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand p { margin-top: 12px; max-width: 320px; }
    footer h4 { color: var(--text-white); font-size: 16px; margin-bottom: 16px; font-weight: 600; }
    footer ul { display: flex; flex-direction: column; gap: 10px; }
    footer ul a { color: rgba(255,255,255,0.6); font-size: 14px; transition: all var(--transition); }
    footer ul a:hover { color: var(--accent); padding-left: 4px; }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        padding-top: 24px;
        border-top: 1px solid rgba(255,255,255,0.08);
        font-size: 13px;
        color: rgba(255,255,255,0.45);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; gap: 32px; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        .article-hero h1 { font-size: 30px; }
    }
    @media (max-width: 768px) {
        .nav-list { display: none; }
        .nav-toggle { display: block; }
        .mobile-nav { display: flex; }
        .header-inner { padding: 0 16px; }
        .article-hero { padding: 100px 0 40px; }
        .article-hero h1 { font-size: 24px; }
        .article-main { padding: 24px; }
        .article-sidebar { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .article-meta { gap: 12px; font-size: 13px; }
        .article-cta h2 { font-size: 22px; }
        .article-cta .btn-group { flex-direction: column; align-items: center; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-hero h1 { font-size: 20px; }
        .article-main { padding: 16px; }
        .article-main .content { font-size: 15px; }
        .site-logo { font-size: 18px; }
        .article-cta { padding: 40px 0; }
        footer { padding: 40px 0 20px; }
    }

    /* ===== Accessibility ===== */
    a:focus-visible, button:focus-visible, .btn:focus-visible {
        outline: 3px solid var(--accent);
        outline-offset: 2px;
    }

    /* ===== Smooth image loading ===== */
    .article-main .content img { transition: opacity 0.4s; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1f3d;
            --primary-light: #1a3a6a;
            --primary-dark: #070f1e;
            --accent: #d4a030;
            --accent-light: #f0c850;
            --accent-dark: #b8891e;
            --bg: #f5f7fa;
            --bg-white: #ffffff;
            --bg-dark: #0a1528;
            --bg-card: #ffffff;
            --text: #1a2a3a;
            --text-light: #6a7a8a;
            --text-muted: #9aabbb;
            --text-white: #ffffff;
            --border: #e0e5ec;
            --border-light: #f0f2f6;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.14);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.18);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 76px;
            --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--primary-dark);
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            margin-bottom: 1rem;
        }
        :focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(15, 31, 61, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: var(--transition);
        }
        #header.scrolled {
            background: rgba(15, 31, 61, 0.98);
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .nav-left,
        .nav-right {
            flex: 1;
            display: flex;
            align-items: center;
        }
        .nav-left {
            justify-content: flex-start;
        }
        .nav-right {
            justify-content: flex-end;
            gap: 12px;
        }
        .nav-center {
            flex-shrink: 0;
            padding: 0 20px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            display: inline-block;
            padding: 6px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-xs);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover,
        .nav-list a:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-list a.active {
            color: var(--accent);
            background: rgba(212, 160, 48, 0.15);
        }
        .site-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }
        .site-logo span {
            color: var(--accent);
            font-weight: 700;
        }
        .site-logo:hover {
            color: #fff;
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: #fff;
            padding: 6px 10px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: rgba(15, 31, 61, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 20px 24px 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 999;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .nav-list {
            flex-direction: column;
            align-items: stretch;
            gap: 4px;
        }
        .mobile-menu .nav-list a {
            padding: 12px 16px;
            font-size: 1rem;
            border-radius: 8px;
        }

        /* ===== Hero ===== */
        .category-hero {
            padding: 140px 0 80px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.85) 30%, rgba(10, 21, 40, 0.6) 70%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero h1 {
            color: #fff;
            font-size: 3rem;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .category-hero h1 span {
            color: var(--accent);
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .hero-tags .tag {
            display: inline-block;
            padding: 6px 20px;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .hero-tags .tag:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            position: relative;
            display: inline-block;
            margin-bottom: 12px;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 14px auto 0;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 16px auto 0;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent-light);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .card:hover .card-img {
            transform: scale(1.02);
        }
        .card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .card-body p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 12px;
            flex: 1;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .card-body .card-meta i {
            font-style: normal;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .card-badge {
            display: inline-block;
            padding: 3px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 30px;
            background: rgba(212, 160, 48, 0.12);
            color: var(--accent-dark);
            border: 1px solid rgba(212, 160, 48, 0.2);
            margin-bottom: 10px;
            align-self: flex-start;
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .stat-item .number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            display: block;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
            display: block;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
            text-align: center;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .step-item:hover::before {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .step-item h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .step-item p {
            color: var(--text-light);
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent-light);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-dark);
        }
        .faq-question .icon {
            font-size: 1.2rem;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.88), rgba(10, 21, 40, 0.78));
            z-index: 1;
        }
        .cta-block>* {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 160, 48, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover,
        .btn-outline:focus {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 12px 0 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.4);
        }
        .breadcrumb .current {
            color: var(--accent);
        }

        /* ===== 图文区块 ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-block .image-wrap {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .split-block .image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }
        .split-block .content h2 {
            margin-bottom: 16px;
        }
        .split-block .content p {
            color: var(--text-light);
            font-size: 1rem;
            margin-bottom: 16px;
        }
        .split-block .content ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 20px;
        }
        .split-block .content ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
        }
        .split-block .content ul li::before {
            content: '✓';
            color: var(--accent);
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 80px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 20px 0;
        }

        /* ===== 标签 ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-item {
            display: inline-block;
            padding: 4px 16px;
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: 30px;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .tag-item:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        /* ===== 页脚 ===== */
        footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        footer .site-logo {
            font-size: 1.35rem;
            margin-bottom: 12px;
            display: inline-block;
        }
        footer p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 28px;
        }
        .footer-grid h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-grid ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-grid ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .split-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .split-block .image-wrap img {
                min-height: 240px;
            }
            .category-hero h1 {
                font-size: 2.4rem;
            }
            .cta-block {
                padding: 44px 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-list a {
                padding: 4px 12px;
                font-size: 0.82rem;
            }
            .nav-center {
                padding: 0 12px;
            }
            .site-logo {
                font-size: 1.2rem;
            }
            .nav-left .nav-list {
                display: none;
            }
            .nav-right .nav-list {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .category-hero {
                padding: 110px 0 60px;
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 52px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-item .number {
                font-size: 2rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-item {
                padding: 28px 20px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-block {
                padding: 36px 24px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 280px;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .split-block .content h2 {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .hero-tags .tag {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
            .stat-item .number {
                font-size: 1.6rem;
            }
            .stat-item .label {
                font-size: 0.82rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .card-body h3 {
                font-size: 1.05rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                font-size: 0.88rem;
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            .site-logo {
                font-size: 1rem;
            }
        }

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }