/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --primary: #C41E3A;
        --primary-dark: #9B152C;
        --primary-light: #E84A5F;
        --secondary: #D4A017;
        --secondary-light: #F5D76E;
        --accent: #FFF8E7;
        --bg: #FFFFFF;
        --bg-alt: #F7F8FA;
        --bg-dark: #1A1A2E;
        --text: #1A1A2E;
        --text-light: #6B7280;
        --text-white: #FFFFFF;
        --border: #E5E7EB;
        --border-light: #F0F0F0;
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
        --shadow: 0 4px 20px rgba(0,0,0,0.08);
        --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
        --shadow-hover: 0 8px 32px rgba(196,30,58,0.15);
        --radius-sm: 6px;
        --radius: 12px;
        --radius-lg: 20px;
        --radius-full: 50px;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
        --max-width: 1200px;
        --header-h: 72px;
    }

    /* ===== 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);
        overflow-x: hidden;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }
    button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 0.8rem; }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header & Nav ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255,255,255,0.97);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-light);
        height: var(--header-h);
        transition: var(--transition);
    }
    .header.scrolled { box-shadow: var(--shadow); }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-h);
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.35rem;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.3px;
        flex-shrink: 0;
    }
    .logo i { font-size: 1.7rem; color: var(--secondary); }
    .logo:hover { color: var(--primary-dark); }
    .nav-main {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-main a {
        padding: 8px 18px;
        border-radius: var(--radius-full);
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text);
        transition: var(--transition);
        position: relative;
    }
    .nav-main a:hover { background: var(--accent); color: var(--primary); }
    .nav-main a.active { background: var(--primary); color: var(--text-white); }
    .nav-main a.active:hover { background: var(--primary-dark); }
    .nav-right {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .search-box {
        display: flex;
        align-items: center;
        background: var(--bg-alt);
        border-radius: var(--radius-full);
        padding: 6px 16px;
        border: 1px solid var(--border);
        transition: var(--transition);
        min-width: 180px;
    }
    .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(196,30,58,0.1); }
    .search-box i { color: var(--text-light); font-size: 0.9rem; }
    .search-box input {
        background: transparent;
        border: none;
        padding: 6px 10px;
        font-size: 0.9rem;
        color: var(--text);
        width: 100%;
    }
    .search-box input::placeholder { color: var(--text-light); }
    .btn-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 28px;
        border-radius: var(--radius-full);
        font-weight: 600;
        font-size: 0.95rem;
        cursor: pointer;
        transition: var(--transition);
        background: var(--primary);
        color: var(--text-white);
        border: none;
    }
    .btn-cta:hover { background: var(--primary-dark); color: var(--text-white); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(196,30,58,0.3); }
    .btn-cta i { font-size: 0.9rem; }
    .btn-cta-outline {
        background: transparent;
        color: var(--primary);
        border: 2px solid var(--primary);
    }
    .btn-cta-outline:hover { background: var(--primary); color: var(--text-white); }

    /* Hamburger */
    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 4px;
        background: none;
        border: none;
    }
    .hamburger span {
        display: block;
        width: 26px;
        height: 2.5px;
        background: var(--text);
        border-radius: 4px;
        transition: var(--transition);
    }
    .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    /* Mobile Nav */
    .mobile-nav {
        display: none;
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 20px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        z-index: 999;
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
    }
    .mobile-nav.open { display: block; }
    .mobile-nav a {
        display: block;
        padding: 12px 16px;
        font-size: 1.05rem;
        font-weight: 500;
        color: var(--text);
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }
    .mobile-nav a:hover { background: var(--accent); color: var(--primary); }
    .mobile-nav a.active { background: var(--primary); color: var(--text-white); }
    .mobile-nav .btn-cta { margin-top: 16px; width: 100%; justify-content: center; }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 92vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 120px 24px 80px;
        margin-top: var(--header-h);
        background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(196,30,58,0.7) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        color: var(--text-white);
        overflow: hidden;
    }
    .hero::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 120px;
        background: linear-gradient(to top, var(--bg), transparent);
    }
    .hero-content { position: relative; z-index: 2; max-width: 800px; }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 20px;
        background: rgba(255,255,255,0.15);
        backdrop-filter: blur(6px);
        border-radius: var(--radius-full);
        font-size: 0.9rem;
        font-weight: 500;
        margin-bottom: 24px;
        border: 1px solid rgba(255,255,255,0.2);
    }
    .hero-badge i { color: var(--secondary-light); }
    .hero h1 {
        font-size: 3.2rem;
        font-weight: 800;
        line-height: 1.25;
        margin-bottom: 20px;
        color: var(--text-white);
        text-shadow: 0 2px 20px rgba(0,0,0,0.2);
    }
    .hero h1 span { color: var(--secondary-light); }
    .hero p {
        font-size: 1.2rem;
        line-height: 1.7;
        color: rgba(255,255,255,0.9);
        margin-bottom: 36px;
        max-width: 640px;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }
    .hero-actions .btn-cta { font-size: 1.1rem; padding: 16px 40px; background: var(--secondary); color: var(--text); }
    .hero-actions .btn-cta:hover { background: #C4920A; color: var(--text); box-shadow: 0 8px 28px rgba(212,160,23,0.4); }
    .hero-actions .btn-cta-outline { border-color: rgba(255,255,255,0.6); color: var(--text-white); }
    .hero-actions .btn-cta-outline:hover { background: rgba(255,255,255,0.15); border-color: var(--text-white); }
    .hero-stats {
        display: flex;
        gap: 40px;
        justify-content: center;
        margin-top: 48px;
        flex-wrap: wrap;
    }
    .hero-stat { text-align: center; }
    .hero-stat .num { font-size: 2.2rem; font-weight: 800; color: var(--secondary-light); display: block; }
    .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.7); margin-top: 4px; }

    /* ===== Section Common ===== */
    .section { padding: 80px 0; }
    .section-alt { background: var(--bg-alt); }
    .section-dark { background: var(--bg-dark); color: var(--text-white); }
    .section-title {
        text-align: center;
        margin-bottom: 48px;
    }
    .section-title h2 { margin-bottom: 12px; }
    .section-title p { color: var(--text-light); max-width: 560px; margin: 0 auto; font-size: 1.05rem; }
    .section-dark .section-title h2 { color: var(--text-white); }
    .section-dark .section-title p { color: rgba(255,255,255,0.7); }

    /* ===== Intro Section ===== */
    .intro-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }
    .intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
    .intro-image img { width: 100%; height: 400px; object-fit: cover; transition: var(--transition); }
    .intro-image:hover img { transform: scale(1.03); }
    .intro-text h3 { font-size: 1.6rem; margin-bottom: 16px; }
    .intro-text p { color: var(--text-light); line-height: 1.8; }
    .intro-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
    .tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 16px;
        border-radius: var(--radius-full);
        font-size: 0.85rem;
        font-weight: 500;
        background: var(--accent);
        color: var(--primary);
        border: 1px solid rgba(196,30,58,0.1);
    }
    .tag i { font-size: 0.8rem; }

    /* ===== Category Cards ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .category-card {
        background: var(--bg);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        cursor: pointer;
    }
    .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(196,30,58,0.15); }
    .category-card .card-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        transition: var(--transition);
    }
    .category-card:hover .card-img { transform: scale(1.05); }
    .category-card .card-body { padding: 22px 24px 26px; }
    .category-card .card-body h4 { margin-bottom: 8px; font-size: 1.2rem; }
    .category-card .card-body p { color: var(--text-light); font-size: 0.95rem; line-height: 1.6; margin-bottom: 12px; }
    .category-card .card-tag { color: var(--primary); font-weight: 600; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; }

    /* ===== Latest News (CMS) ===== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .news-card {
        display: flex;
        gap: 20px;
        background: var(--bg);
        border-radius: var(--radius);
        padding: 20px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .news-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
    .news-card .news-img {
        width: 140px;
        min-height: 100px;
        border-radius: var(--radius-sm);
        object-fit: cover;
        flex-shrink: 0;
    }
    .news-card .news-body { flex: 1; min-width: 0; }
    .news-card .news-body h4 { font-size: 1.05rem; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .news-card .news-body h4 a { color: var(--text); }
    .news-card .news-body h4 a:hover { color: var(--primary); }
    .news-card .news-body p { color: var(--text-light); font-size: 0.9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 0.8rem;
        color: var(--text-light);
    }
    .news-meta .cat { background: var(--accent); color: var(--primary); padding: 2px 12px; border-radius: var(--radius-full); font-weight: 500; }
    .news-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 60px 20px;
        color: var(--text-light);
        background: var(--bg-alt);
        border-radius: var(--radius);
        font-size: 1.05rem;
    }
    .news-empty i { font-size: 2.4rem; color: var(--border); margin-bottom: 16px; display: block; }

    /* ===== Stats / Data Section ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
        text-align: center;
    }
    .stat-card {
        background: var(--bg);
        border-radius: var(--radius);
        padding: 36px 20px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .stat-card .icon { font-size: 2.4rem; color: var(--primary); margin-bottom: 12px; }
    .stat-card .num { font-size: 2.2rem; font-weight: 800; color: var(--primary); display: block; }
    .stat-card .label { color: var(--text-light); font-size: 0.95rem; margin-top: 6px; }

    /* ===== Features ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .feature-card {
        background: var(--bg);
        border-radius: var(--radius);
        padding: 32px 28px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        text-align: center;
    }
    .feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
    .feature-card .f-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        background: var(--accent);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 18px;
        font-size: 1.8rem;
        color: var(--primary);
        transition: var(--transition);
    }
    .feature-card:hover .f-icon { background: var(--primary); color: var(--text-white); }
    .feature-card h4 { margin-bottom: 10px; }
    .feature-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

    /* ===== How To / Flow ===== */
    .flow-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        position: relative;
    }
    .flow-step {
        text-align: center;
        position: relative;
    }
    .flow-step .step-num {
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: var(--primary);
        color: var(--text-white);
        font-size: 1.4rem;
        font-weight: 800;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 16px;
        position: relative;
        z-index: 2;
        box-shadow: 0 4px 16px rgba(196,30,58,0.25);
    }
    .flow-step h4 { margin-bottom: 8px; }
    .flow-step p { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 800px; margin: 0 auto; }
    .faq-item {
        background: var(--bg);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-light);
        margin-bottom: 12px;
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--border); }
    .faq-question {
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        user-select: none;
        background: none;
        width: 100%;
        text-align: left;
        color: var(--text);
        transition: var(--transition);
    }
    .faq-question:hover { color: var(--primary); }
    .faq-question i { color: var(--text-light); transition: var(--transition); font-size: 0.85rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 24px;
        color: var(--text-light);
        line-height: 1.7;
        font-size: 0.95rem;
    }
    .faq-item.open .faq-answer {
        max-height: 400px;
        padding: 0 24px 20px;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        border-radius: var(--radius-lg);
        padding: 64px 48px;
        text-align: center;
        color: var(--text-white);
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.06) 0%, transparent 60%);
    }
    .cta-section h2 { font-size: 2.2rem; color: var(--text-white); margin-bottom: 16px; position: relative; }
    .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.9); max-width: 560px; margin: 0 auto 32px; position: relative; }
    .cta-section .btn-cta { background: var(--secondary); color: var(--text); font-size: 1.1rem; padding: 16px 44px; position: relative; }
    .cta-section .btn-cta:hover { background: #C4920A; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(212,160,23,0.4); }

    /* ===== Footer ===== */
    .footer {
        background: var(--bg-dark);
        color: rgba(255,255,255,0.7);
        padding: 56px 0 32px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand .logo { color: var(--text-white); margin-bottom: 12px; }
    .footer-brand .logo i { color: var(--secondary); }
    .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
    .footer-col h5 { color: var(--text-white); font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
    .footer-col a {
        display: block;
        padding: 5px 0;
        font-size: 0.9rem;
        color: rgba(255,255,255,0.6);
        transition: var(--transition);
    }
    .footer-col a:hover { color: var(--secondary-light); padding-left: 4px; }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
    }
    .footer-bottom a { color: rgba(255,255,255,0.6); }
    .footer-bottom a:hover { color: var(--secondary-light); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.7rem; }
        .hero h1 { font-size: 2.6rem; }
        .intro-grid { gap: 32px; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .flow-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
        .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    }

    @media (max-width: 768px) {
        :root { --header-h: 64px; }
        h1 { font-size: 1.8rem; }
        h2 { font-size: 1.4rem; }
        .header-inner { padding: 0 16px; }
        .nav-main { display: none; }
        .nav-right .search-box { display: none; }
        .nav-right .btn-cta { display: none; }
        .hamburger { display: flex; }
        .mobile-nav .search-box { display: flex; margin-bottom: 16px; width: 100%; }
        .mobile-nav .btn-cta { display: flex; }

        .hero { min-height: 70vh; padding: 100px 16px 60px; }
        .hero h1 { font-size: 2rem; }
        .hero p { font-size: 1rem; }
        .hero-stats { gap: 24px; }
        .hero-stat .num { font-size: 1.6rem; }

        .section { padding: 48px 0; }
        .section-title { margin-bottom: 32px; }

        .intro-grid { grid-template-columns: 1fr; gap: 24px; }
        .intro-image img { height: 240px; }

        .category-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
        .category-card .card-img { height: 150px; }

        .news-grid { grid-template-columns: 1fr; gap: 16px; }
        .news-card { flex-direction: column; }
        .news-card .news-img { width: 100%; height: 180px; }

        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
        .stat-card { padding: 24px 16px; }
        .stat-card .num { font-size: 1.8rem; }

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

        .flow-grid { grid-template-columns: 1fr 1fr; gap: 20px; }

        .cta-section { padding: 40px 24px; }
        .cta-section h2 { font-size: 1.6rem; }

        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    @media (max-width: 520px) {
        .category-grid { grid-template-columns: 1fr; }
        .flow-grid { grid-template-columns: 1fr; }
        .hero h1 { font-size: 1.6rem; }
        .hero-actions .btn-cta { width: 100%; justify-content: center; }
        .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    }

    /* ===== Animations ===== */
    .fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
    .fade-in.visible { opacity: 1; transform: translateY(0); }

    /* ===== Misc ===== */
    .text-center { text-align: center; }
    .mt-8 { margin-top: 8px; }
    .mt-16 { margin-top: 16px; }
    .mt-24 { margin-top: 24px; }
    .mb-16 { margin-bottom: 16px; }
    .gap-8 { gap: 8px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .rounded-full { border-radius: var(--radius-full); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #c62828;
            --primary-dark: #b71c1c;
            --primary-light: #e53935;
            --secondary: #f9a825;
            --secondary-light: #fdd835;
            --accent: #ff6f00;
            --bg: #fafafa;
            --bg-alt: #f5f0eb;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-muted: #8a8aaa;
            --border: #e8e0d8;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input {
            font-family: var(--font);
            font-size: 1rem;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
        }
        p {
            color: var(--text-light);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 16px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(198, 40, 40, 0.06);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 15px rgba(198, 40, 40, 0.25);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid transparent;
            transition: all var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(198, 40, 40, 0.08);
        }
        .search-box i {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 10px;
            font-size: 0.9rem;
            color: var(--text);
            width: 140px;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #1a1a2e;
            box-shadow: 0 4px 18px rgba(249, 168, 37, 0.35);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(249, 168, 37, 0.45);
        }
        .btn-cta i {
            font-size: 0.85rem;
        }

        /* Mobile toggle */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        @media (max-width: 900px) {
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 12px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: var(--shadow-lg);
                margin: 0;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-main a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .mobile-toggle {
                display: flex;
            }
            .search-box input {
                width: 100px;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                padding: 0 12px;
            }
            .logo span {
                font-size: 1.1rem;
            }
            .search-box {
                display: none;
            }
            .btn-cta {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            .btn-cta span {
                display: none;
            }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding-top: var(--header-height);
            min-height: 320px;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #1a1a2e 0%, #2d1b1b 50%, #1a1a2e 100%);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(249, 168, 37, 0.15), transparent 70%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
        }
        .page-banner h1 i {
            color: var(--secondary);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .page-banner .banner-tags span {
            padding: 6px 18px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
        }
        @media (max-width: 768px) {
            .page-banner {
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .page-banner .container {
                padding: 40px 16px;
            }
        }
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner h1 i {
                margin-right: 6px;
            }
            .page-banner .banner-tags span {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            font-size: 0.65rem;
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-title h2 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 16px auto 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .section-title p {
                font-size: 0.95rem;
            }
            .section-title {
                margin-bottom: 32px;
            }
        }

        /* ===== Guide Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .guide-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .guide-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-card:hover .card-img img {
            transform: scale(1.05);
        }
        .guide-card .card-img .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(198, 40, 40, 0.3);
        }
        .guide-card .card-body {
            padding: 24px;
        }
        .guide-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .guide-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .guide-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .guide-card .card-body .meta i {
            margin-right: 4px;
        }
        .guide-card .card-body .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            transition: gap var(--transition);
        }
        .guide-card .card-body .btn-link:hover {
            gap: 12px;
        }
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-card .card-img {
                height: 180px;
            }
            .guide-card .card-body {
                padding: 18px;
            }
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            margin: 0 auto 16px;
            box-shadow: 0 6px 20px rgba(198, 40, 40, 0.25);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .step-item .step-arrow {
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.2rem;
            color: var(--text-muted);
        }
        .steps-grid .step-item:last-child .step-arrow {
            display: none;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-item .step-arrow {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                padding: 24px 16px;
            }
        }

        /* ===== 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: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(198, 40, 40, 0.15);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-item .faq-q:hover {
            background: rgba(198, 40, 40, 0.03);
        }
        .faq-item .faq-q i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        @media (max-width: 640px) {
            .faq-item .faq-q {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item .faq-a {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-a {
                padding: 0 16px 14px;
            }
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stat-item .stat-num {
            font-size: 2.4rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-item .stat-num {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
        }

        /* ===== Tags ===== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 24px;
        }
        .tags-cloud a {
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-light);
            transition: all var(--transition);
        }
        .tags-cloud a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(198, 40, 40, 0.2);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a1a2e 0%, #2d1b1b 50%, #1a1a2e 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(249, 168, 37, 0.1), transparent 60%);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 44px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #1a1a2e;
            box-shadow: 0 8px 30px rgba(249, 168, 37, 0.35);
            transition: all var(--transition);
        }
        .cta-section .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 50px rgba(249, 168, 37, 0.5);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta-large {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #12121e;
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            color: var(--secondary);
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff, #e0e0e0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            gap: 12px;
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            box-shadow: 0 6px 24px rgba(198, 40, 40, 0.3);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            border: none;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(198, 40, 40, 0.4);
        }
        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 0.95rem;
            }
        }

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

/* roulang page: article */
/* === 设计变量 === */
        :root {
            --primary: #d4262f;
            --primary-dark: #a61c24;
            --primary-light: #fce4e6;
            --secondary: #f5a623;
            --secondary-light: #fef3d9;
            --accent: #1a73e8;
            --bg: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1180px;
            --header-height: 72px;
            --spacing: 64px;
            --spacing-lg: 96px;
            --spacing-sm: 32px;
        }

        /* === 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(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }

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

        /* === 导航 === */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            flex-shrink: 0;
        }
        .logo i { font-size: 1.6rem; color: var(--secondary); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            position: relative;
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-decoration: none;
        }
        .nav-main a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-main a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 6px 16px;
            transition: all var(--transition);
        }
        .search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(212,38,47,0.10); }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--text);
            width: 120px;
        }
        .search-box input::placeholder { color: var(--text-light); }
        .search-box i { color: var(--text-light); font-size: 0.9rem; margin-right: 6px; }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(212,38,47,0.30);
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,38,47,0.40); color: #fff; }
        .btn-cta:active { transform: translateY(0); }
        .btn-cta i { font-size: 0.9rem; }

        /* 移动端汉堡按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .menu-toggle:hover { background: var(--bg); }

        /* === Hero 文章头图 === */
        .article-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px 60px;
            background: linear-gradient(135deg, #0f0c29, #1a1a3e, #24243e);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.30;
            mix-blend-mode: overlay;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(0,0,0,0.30), rgba(0,0,0,0.70));
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }
        .article-hero .category-badge {
            display: inline-block;
            padding: 6px 20px;
            background: rgba(245,166,35,0.20);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(245,166,35,0.30);
            border-radius: 50px;
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.30);
        }
        .article-hero .meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
        }
        .article-hero .meta i { margin-right: 6px; }
        .article-hero .meta span { display: flex; align-items: center; }

        /* === 面包屑 === */
        .breadcrumb {
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            background: #fff;
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb i { font-size: 0.7rem; color: var(--text-light); }

        /* === 文章正文 === */
        .article-body {
            padding: 48px 0 64px;
            background: #fff;
        }
        .article-body .container {
            max-width: 860px;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2, .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.2rem;
            color: var(--text-secondary);
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
            box-shadow: var(--shadow);
        }
        .article-content ul, .article-content ol {
            margin: 1rem 0 1.5rem 1.5rem;
            color: var(--text-secondary);
        }
        .article-content li { margin-bottom: 0.5rem; list-style: disc; }
        .article-content a { color: var(--primary); text-decoration: underline; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        /* === 文章底部信息 === */
        .article-footer {
            padding: 24px 0 0;
            border-top: 1px solid var(--border);
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 5px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .tag:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg);
            color: var(--text-secondary);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

        /* === 文章导航（返回） === */
        .article-nav {
            padding: 24px 0;
            background: var(--bg);
            border-top: 1px solid var(--border);
        }
        .article-nav .container {
            max-width: 860px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-xs);
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .article-nav .back-home {
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-secondary);
        }
        .article-nav .back-home:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
        .article-nav .go-guide {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 14px rgba(212,38,47,0.20);
        }
        .article-nav .go-guide:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,38,47,0.30); color: #fff; }

        /* === 相关文章 === */
        .related-section {
            padding: 64px 0;
            background: var(--bg);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-header h2 {
            font-size: 1.8rem;
            margin-bottom: 8px;
        }
        .related-section .section-header p {
            color: var(--text-light);
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h3 a { color: var(--text); text-decoration: none; }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
        }

        /* === CTA 区域 === */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, #1a1a2e, #16213e);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
        }
        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.70);
            margin-bottom: 28px;
        }
        .cta-section .btn-cta {
            font-size: 1.1rem;
            padding: 14px 40px;
        }

        /* === 页脚 === */
        .footer {
            background: #0f0f1a;
            color: rgba(255,255,255,0.70);
            padding: 56px 0 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer .container { max-width: var(--max-width); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; color: #fff; }
        .footer-brand .logo i { color: var(--secondary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 360px; line-height: 1.7; }
        .footer-col h5 {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-col a:hover { color: var(--secondary); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.40);
        }

        /* === 未找到文章 === */
        .not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found i { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
        .not-found h2 { font-size: 1.8rem; color: var(--text); margin-bottom: 12px; }
        .not-found p { color: var(--text-light); margin-bottom: 24px; }
        .not-found .btn-cta { display: inline-flex; }

        /* === 响应式 === */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .article-hero h1 { font-size: 2.2rem; }
        }

        @media (max-width: 768px) {
            :root { --spacing: 40px; --spacing-lg: 60px; }
            .menu-toggle { display: block; }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
                z-index: 99;
            }
            .nav-main.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-main a { padding: 12px 16px; width: 100%; border-radius: var(--radius-xs); font-size: 1rem; }
            .nav-main a.active::after { display: none; }
            .search-box { display: none; }
            .header .btn-cta { padding: 8px 18px; font-size: 0.85rem; }
            .article-hero { min-height: 300px; padding: 60px 20px 40px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero .meta { gap: 12px; font-size: 0.8rem; }
            .article-body { padding: 32px 0 40px; }
            .article-content { font-size: 0.98rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-nav .container { flex-direction: column; align-items: stretch; }
            .article-nav a { justify-content: center; }
            .article-footer { flex-direction: column; align-items: flex-start; }
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section p { font-size: 0.95rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-hero { min-height: 240px; padding: 48px 16px 32px; }
            .logo { font-size: 1.15rem; }
            .logo i { font-size: 1.3rem; }
            .header .btn-cta { padding: 6px 14px; font-size: 0.8rem; gap: 4px; }
            .related-card .card-img { height: 160px; }
            .cta-section { padding: 48px 0; }
            .cta-section h2 { font-size: 1.3rem; }
        }

        /* === 分割线装饰 === */
        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .text-center { text-align: center; }