/* roulang page: index */
:root {
            --primary-deep: #1a0f2e;
            --primary-mid: #2d1b4e;
            --primary-dark: #0e0a1a;
            --accent-gold: #f5a623;
            --accent-orange: #ff7a45;
            --accent-amber: #ffc107;
            --bg-warm: #faf6f0;
            --bg-card: #fffdf8;
            --bg-dark-section: #1e1430;
            --text-main: #2b2235;
            --text-soft: #6b5d78;
            --text-light: #f5ede4;
            --text-muted: #a89bb8;
            --border-soft: #eadfce;
            --border-glow: rgba(245, 166, 35, 0.35);
            --shadow-card: 0 8px 28px rgba(30, 20, 48, 0.08);
            --shadow-hover: 0 16px 42px rgba(30, 20, 48, 0.16);
            --radius-lg: 22px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --gradient-brand: linear-gradient(135deg, #1a0f2e 0%, #3a1d5e 40%, #7a2d5e 70%, #c85a3a 100%);
            --gradient-accent: linear-gradient(135deg, #f5a623 0%, #ff7a45 55%, #ffb347 100%);
            --gradient-hero: linear-gradient(135deg, rgba(18, 10, 30, 0.92) 0%, rgba(45, 27, 78, 0.88) 40%, rgba(90, 35, 75, 0.78) 70%, rgba(200, 90, 58, 0.65) 100%);
            --gradient-dark-card: linear-gradient(145deg, #231636 0%, #2d1b4e 100%);
            --space-section: 96px;
            --space-section-mobile: 56px;
            --font-num: 'Georgia', 'Times New Roman', serif;
            --transition-base: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-warm);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--accent-orange);
            text-decoration: none;
            outline: none;
        }

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

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

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container-fluid {
            max-width: 100%;
            padding-left: 0;
            padding-right: 0;
        }

        section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-alt {
            background-color: #f3ecdf;
        }

        .section-dark {
            background-color: var(--bg-dark-section);
            color: var(--text-light);
        }

        .section-dark .section-title {
            color: var(--text-light);
        }

        .section-dark .section-sub {
            color: var(--text-muted);
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-gold);
            font-weight: 700;
            margin-bottom: 14px;
            padding: 4px 14px;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.06);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.32;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .section-sub {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-soft);
            max-width: 760px;
            margin-bottom: 36px;
        }

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

        .text-gradient {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .fw-800 {
            font-weight: 800;
        }

        .fw-700 {
            font-weight: 700;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(26, 15, 46, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(245, 166, 35, 0.22);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: var(--transition-base);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.55rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--gradient-accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #1a0f2e;
            font-weight: 900;
            flex-shrink: 0;
        }

        .brand-logo:hover,
        .brand-logo:focus {
            color: var(--accent-gold);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            color: #d8cde4;
            font-size: 0.95rem;
            font-weight: 600;
            padding: 6px 12px;
            border-radius: 8px;
            position: relative;
            letter-spacing: 0.02em;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .main-nav a:hover,
        .main-nav a:focus {
            color: var(--accent-gold);
            background: rgba(245, 166, 35, 0.1);
        }

        .main-nav a.active {
            color: var(--accent-gold);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 12px;
            right: 12px;
            height: 3px;
            background: var(--accent-gold);
            border-radius: 3px;
        }

        .nav-cta {
            background: var(--gradient-accent);
            color: #1a0f2e;
            font-weight: 700;
            padding: 8px 20px;
            border-radius: var(--radius-pill);
            font-size: 0.92rem;
            letter-spacing: 0.03em;
            white-space: nowrap;
            transition: var(--transition-base);
            border: none;
            cursor: pointer;
        }

        .nav-cta:hover,
        .nav-cta:focus {
            color: #1a0f2e;
            filter: brightness(1.1);
            box-shadow: 0 6px 18px rgba(245, 166, 35, 0.4);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            background: transparent;
            border: none;
            width: 44px;
            height: 44px;
            padding: 8px;
            cursor: pointer;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 100%;
            height: 3px;
            background: var(--text-light);
            border-radius: 3px;
            margin: 5px 0;
            transition: var(--transition-base);
        }

        .hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }

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

        .hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(14, 10, 26, 0.97);
            z-index: 200;
            padding: 24px;
            flex-direction: column;
            gap: 12px;
            overflow-y: auto;
        }

        .mobile-menu-overlay.open {
            display: flex;
        }

        .mobile-menu-overlay .close-mobile {
            align-self: flex-end;
            background: transparent;
            border: none;
            color: var(--text-light);
            font-size: 2rem;
            cursor: pointer;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }

        .mobile-menu-overlay .close-mobile:hover {
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent-gold);
        }

        .mobile-menu-overlay a {
            color: var(--text-light);
            font-size: 1.2rem;
            font-weight: 600;
            padding: 14px 16px;
            border-radius: 12px;
            transition: var(--transition-base);
            text-align: left;
            display: block;
        }

        .mobile-menu-overlay a:hover,
        .mobile-menu-overlay a.active {
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-gold);
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 82vh;
            display: flex;
            align-items: center;
            background-image: var(--gradient-hero), url('/assets/images/fd8c86aab29b360c.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-light);
            padding: 80px 0 60px;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-warm) 0%, transparent 100%);
            pointer-events: none;
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -0.015em;
            color: #fff;
            margin-bottom: 22px;
            max-width: 850px;
        }

        .hero-title .highlight {
            color: var(--accent-gold);
            position: relative;
        }

        .hero-sub {
            font-size: 1.18rem;
            line-height: 1.8;
            color: #e8ddf0;
            max-width: 720px;
            margin-bottom: 32px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat .stat-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-gold);
            font-family: var(--font-num);
            line-height: 1.2;
        }

        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: #bfb0d0;
            letter-spacing: 0.05em;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1rem;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--gradient-accent);
            color: #1a0f2e;
            box-shadow: 0 6px 22px rgba(245, 166, 35, 0.35);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            color: #1a0f2e;
            filter: brightness(1.08);
            box-shadow: 0 10px 30px rgba(245, 166, 35, 0.5);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(8px);
        }

        .btn-secondary:hover,
        .btn-secondary:focus {
            background: rgba(255, 255, 255, 0.22);
            color: var(--accent-gold);
            border-color: var(--accent-gold);
            transform: translateY(-2px);
        }

        .btn-lg {
            font-size: 1.08rem;
            padding: 14px 34px;
        }

        .btn-sm {
            font-size: 0.88rem;
            padding: 8px 18px;
        }

        /* ========== Pill Nav ========== */
        .pill-nav-section {
            padding: 20px 0 0;
            margin-top: -40px;
            position: relative;
            z-index: 5;
        }

        .pill-nav-wrapper {
            background: rgba(255, 253, 248, 0.96);
            border-radius: var(--radius-pill);
            box-shadow: var(--shadow-card);
            padding: 10px 14px;
            border: 1px solid var(--border-soft);
            display: flex;
            gap: 8px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--accent-gold) transparent;
            align-items: center;
            position: relative;
            z-index: 3;
        }

        .pill-nav-wrapper::-webkit-scrollbar {
            height: 4px;
        }

        .pill-nav-wrapper::-webkit-scrollbar-thumb {
            background: var(--accent-gold);
            border-radius: 4px;
        }

        .pill-item {
            flex-shrink: 0;
            padding: 8px 22px;
            border-radius: var(--radius-pill);
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-soft);
            background: transparent;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
            display: inline-block;
        }

        .pill-item:hover,
        .pill-item:focus {
            background: rgba(245, 166, 35, 0.12);
            color: var(--primary-mid);
        }

        .pill-item.active {
            background: var(--gradient-accent);
            color: #1a0f2e;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.35);
            border-color: transparent;
        }

        /* ========== Cards General ========== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-soft);
            padding: 28px;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .card-img-top {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin: -28px -28px 20px -28px;
            max-height: 220px;
        }

        .card-img-top img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            transition: var(--transition-base);
        }

        .card:hover .card-img-top img {
            transform: scale(1.04);
        }

        .card-title {
            font-size: 1.18rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .card-text {
            font-size: 0.96rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: auto;
            padding-top: 12px;
        }

        .tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.12);
            color: #a06a1a;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .tag-dark {
            background: rgba(245, 166, 35, 0.18);
            color: var(--accent-gold);
        }

        .tag-outline {
            background: transparent;
            border: 1px solid var(--border-soft);
            color: var(--text-soft);
        }

        /* ========== Data Badges ========== */
        .badge {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: var(--gradient-dark-card);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            min-width: 120px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(245, 166, 35, 0.18);
            transition: var(--transition-base);
        }

        .badge:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
            transform: translateY(-3px);
        }

        .badge .badge-num {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-gold);
            font-family: var(--font-num);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .badge .badge-num small {
            font-size: 0.9rem;
            font-weight: 600;
            color: #d8cde4;
        }

        .badge .badge-label {
            font-size: 0.85rem;
            color: #bfb0d0;
            margin-top: 8px;
            font-weight: 500;
            letter-spacing: 0.03em;
        }

        .badge-light {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
        }

        .badge-light .badge-num {
            color: var(--primary-mid);
        }

        .badge-light .badge-label {
            color: var(--text-soft);
        }

        /* ========== Pain Point / Solution ========== */
        .pain-grid {
            display: grid;
            gap: 20px;
        }

        .pain-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 26px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .pain-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient-accent);
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }

        .pain-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--border-glow);
        }

        .pain-card .pain-icon {
            font-size: 1.8rem;
            color: var(--accent-gold);
            margin-bottom: 12px;
        }

        .pain-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .pain-card p {
            font-size: 0.92rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== Steps / Timeline ========== */
        .steps-list {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: step-counter;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .steps-list li {
            counter-increment: step-counter;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 24px 26px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-soft);
            transition: var(--transition-base);
        }

        .steps-list li:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-hover);
        }

        .steps-list li::before {
            content: counter(step-counter);
            font-size: 1.4rem;
            font-weight: 900;
            color: #fff;
            background: var(--gradient-accent);
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-num);
        }

        .steps-list .step-content h3 {
            font-size: 1.06rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .steps-list .step-content p {
            font-size: 0.92rem;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.65;
        }

        /* ========== Testimonials ========== */
        .testimonial-grid {
            display: grid;
            gap: 22px;
        }

        .testimonial-card {
            background: linear-gradient(145deg, #fffdf8 0%, #f8f0e2 100%);
            border-radius: var(--radius-lg);
            padding: 26px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-soft);
            transition: var(--transition-base);
            position: relative;
        }

        .testimonial-card::after {
            content: '"';
            position: absolute;
            bottom: 8px;
            right: 18px;
            font-size: 4rem;
            color: rgba(245, 166, 35, 0.15);
            font-family: Georgia, serif;
            line-height: 1;
            pointer-events: none;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--border-glow);
        }

        .testimonial-card .quote {
            font-size: 0.98rem;
            color: var(--text-main);
            line-height: 1.75;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            color: var(--text-soft);
            font-weight: 600;
        }

        .testimonial-card .author .avatar-dot {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--gradient-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #1a0f2e;
            font-weight: 900;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        /* ========== Audience / Matrix ========== */
        .audience-grid {
            display: grid;
            gap: 20px;
        }

        .audience-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 26px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            text-align: center;
        }

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

        .audience-card .aud-icon {
            font-size: 2rem;
            color: var(--accent-gold);
            margin-bottom: 12px;
        }

        .audience-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .audience-card p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.65;
            margin: 0;
        }

        /* ========== List / Article Cards ========== */
        .article-list {
            display: grid;
            gap: 18px;
        }

        .article-row {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 18px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            align-items: center;
        }

        .article-row:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--border-glow);
        }

        .article-row .article-thumb {
            width: 140px;
            height: 90px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .article-row .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }

        .article-row:hover .article-thumb img {
            transform: scale(1.05);
        }

        .article-row .article-info {
            flex: 1;
            min-width: 0;
        }

        .article-row .article-info h4 {
            font-size: 1.02rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-row .article-info p {
            font-size: 0.88rem;
            color: var(--text-soft);
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-row .article-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ========== FAQ ========== */
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border-glow);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            text-align: left;
            transition: var(--transition-base);
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--accent-gold);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 1.1rem;
            color: var(--accent-gold);
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 0.94rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== CTA ========== */
        .cta-banner {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            color: var(--text-light);
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(30, 20, 48, 0.25);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.15);
            pointer-events: none;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 122, 69, 0.12);
            pointer-events: none;
        }

        .cta-banner .cta-title {
            font-size: 2rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-banner .cta-text {
            font-size: 1.05rem;
            color: #e8ddf0;
            max-width: 640px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn {
            position: relative;
            z-index: 1;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-muted);
            padding: 56px 0 28px;
            font-size: 0.88rem;
        }

        .site-footer .footer-container {
            display: grid;
            gap: 28px;
            margin-bottom: 36px;
        }

        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .site-footer .footer-desc {
            color: var(--text-muted);
            line-height: 1.7;
            font-size: 0.88rem;
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: var(--transition-base);
        }

        .site-footer .footer-links a:hover,
        .site-footer .footer-links a:focus {
            color: var(--accent-gold);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
        }

        .site-footer .footer-bottom a {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--accent-gold);
        }

        /* ========== Responsive ========== */
        @media screen and (max-width: 1024px) {
            .hero-title {
                font-size: 2.2rem;
            }

            .section-title {
                font-size: 1.7rem;
            }

            .hero {
                min-height: 70vh;
                padding: 60px 0 50px;
            }

            section {
                padding: 64px 0;
            }
        }

        @media screen and (max-width: 768px) {
            .main-nav {
                display: none;
            }

            .hamburger {
                display: block;
            }

            .hero-title {
                font-size: 1.8rem;
            }

            .hero-sub {
                font-size: 1rem;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat .stat-num {
                font-size: 1.6rem;
            }

            .section-title {
                font-size: 1.45rem;
            }

            section {
                padding: 48px 0;
            }

            .pill-nav-wrapper {
                padding: 8px 10px;
            }

            .pill-item {
                padding: 6px 16px;
                font-size: 0.82rem;
            }

            .article-row {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-row .article-thumb {
                width: 100%;
                height: 160px;
            }

            .cta-banner {
                padding: 36px 22px;
            }

            .cta-banner .cta-title {
                font-size: 1.5rem;
            }

            .badge {
                padding: 18px 14px;
                min-width: 90px;
            }

            .badge .badge-num {
                font-size: 1.6rem;
            }

            .steps-list li {
                flex-direction: column;
                padding: 20px;
            }

            .steps-list li::before {
                width: 36px;
                height: 36px;
                font-size: 1.2rem;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .hero-title {
                font-size: 1.5rem;
                line-height: 1.35;
            }

            .hero-sub {
                font-size: 0.92rem;
            }

            .btn {
                font-size: 0.9rem;
                padding: 10px 22px;
            }

            .btn-lg {
                font-size: 0.95rem;
                padding: 12px 26px;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .section-sub {
                font-size: 0.94rem;
            }

            .card {
                padding: 20px;
            }

            .card-img-top {
                margin: -20px -20px 16px -20px;
            }

            .testimonial-card,
            .audience-card,
            .pain-card {
                padding: 20px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category2 */
:root{
  --primary-deep:#1a0f2e;
  --primary-mid:#2d1b4e;
  --primary-dark:#0e0a1a;
  --accent-gold:#f5a623;
  --accent-orange:#ff7a45;
  --accent-amber:#ffc107;
  --bg-warm:#faf6f0;
  --bg-card:#fffdf8;
  --bg-dark-section:#1e1430;
  --text-main:#2b2235;
  --text-soft:#6b5d78;
  --text-light:#f5ede4;
  --text-muted:#a89bb8;
  --border-soft:#eadfce;
  --border-glow:rgba(245,166,35,0.35);
  --shadow-card:0 8px 28px rgba(30,20,48,0.08);
  --shadow-hover:0 16px 42px rgba(30,20,48,0.16);
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --gradient-brand:linear-gradient(135deg,#1a0f2e 0%,#3a1d5e 40%,#7a2d5e 70%,#c85a3a 100%);
  --gradient-accent:linear-gradient(135deg,#f5a623 0%,#ff7a45 55%,#ffb347 100%);
  --gradient-hero:linear-gradient(135deg,rgba(18,10,30,0.92) 0%,rgba(45,27,78,0.88) 40%,rgba(90,35,75,0.78) 70%,rgba(200,90,58,0.65) 100%);
  --gradient-dark-card:linear-gradient(145deg,#231636 0%,#2d1b4e 100%);
  --space-section:96px;
  --space-section-mobile:56px;
  --font-num:'Georgia','Times New Roman',serif;
  --transition-base:all 0.25s ease;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
  font-size:16px;line-height:1.7;color:var(--text-main);background-color:var(--bg-warm);margin:0;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--accent-gold);text-decoration:none;transition:var(--transition-base);}
a:hover,a:focus{color:var(--accent-orange);text-decoration:none;outline:none;}
a:focus-visible{outline:2px solid var(--accent-gold);outline-offset:3px;border-radius:4px;}
button,input,textarea,select{font-family:inherit;font-size:inherit;line-height:inherit;}
button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent-gold);outline-offset:2px;}
.container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
.container-fluid{max-width:100%;padding-left:0;padding-right:0;}
section{padding:var(--space-section) 0;position:relative;}
.section-alt{background-color:#f3ecdf;}
.section-dark{background-color:var(--bg-dark-section);color:var(--text-light);}
.section-dark .section-title{color:var(--text-light);}
.section-dark .section-sub{color:var(--text-muted);}
.section-label{
  display:inline-block;font-size:0.82rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent-gold);
  font-weight:700;margin-bottom:14px;padding:4px 14px;border:1px solid var(--border-glow);border-radius:var(--radius-pill);
  background:rgba(245,166,35,0.06);
}
.section-title{font-size:2rem;font-weight:800;line-height:1.32;color:var(--text-main);margin-bottom:16px;letter-spacing:-0.01em;}
.section-sub{font-size:1.05rem;line-height:1.75;color:var(--text-soft);max-width:760px;margin-bottom:36px;}
.text-accent{color:var(--accent-gold);}
.text-gradient{background:var(--gradient-accent);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;}
/* Header */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(26,15,46,0.96);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(245,166,35,0.22);box-shadow:0 4px 20px rgba(0,0,0,0.18);transition:var(--transition-base);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px;flex-wrap:wrap;}
.brand-logo{display:inline-flex;align-items:center;color:var(--text-light);font-size:1.55rem;font-weight:800;letter-spacing:0.04em;}
.brand-logo i{color:var(--accent-gold);margin-right:10px;font-size:1.7rem;}
.main-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.main-nav a{
  display:inline-block;padding:8px 16px;border-radius:var(--radius-pill);color:var(--text-light);font-weight:600;
  font-size:0.98rem;transition:var(--transition-base);position:relative;
}
.main-nav a:hover{color:var(--accent-gold);background:rgba(245,166,35,0.08);}
.main-nav a.active{color:var(--accent-gold);background:rgba(245,166,35,0.14);}
.main-nav a.active::after{
  content:'';position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:var(--gradient-accent);border-radius:2px;
}
.mobile-menu-toggle{display:none;background:none;border:none;color:var(--text-light);font-size:1.8rem;cursor:pointer;}
/* Breadcrumb */
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:0.95rem;color:var(--text-soft);margin-bottom:14px;}
.breadcrumb a{color:var(--text-soft);}
.breadcrumb a:hover{color:var(--accent-gold);}
.breadcrumb span{color:var(--accent-gold);}
/* Hero-like H1 area */
.category-head{padding:48px 0 28px;}
.category-head .section-title{font-size:2.6rem;margin-bottom:14px;}
.category-head .section-sub{margin-bottom:0;}
/* Card grid */
.trend-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;}
.trend-card{
  background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);
  border:1px solid var(--border-soft);transition:var(--transition-base);display:flex;flex-direction:column;
}
.trend-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--border-glow);}
.trend-card .card-image{aspect-ratio:16/9;overflow:hidden;position:relative;}
.trend-card .card-image img{width:100%;height:100%;object-fit:cover;}
.trend-card .card-image .badge{
  position:absolute;top:12px;left:12px;background:var(--gradient-accent);color:#fff;font-size:0.75rem;font-weight:700;
  padding:4px 10px;border-radius:var(--radius-pill);
}
.trend-card .card-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1;}
.trend-card h3{font-size:1.2rem;font-weight:800;line-height:1.45;margin-bottom:10px;color:var(--text-main);}
.trend-card p{color:var(--text-soft);font-size:0.95rem;line-height:1.65;margin-bottom:14px;flex:1;}
.trend-card .card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:0.85rem;color:var(--text-muted);}
.trend-card .card-meta .tag{background:rgba(245,166,35,0.1);color:var(--accent-gold);padding:3px 10px;border-radius:var(--radius-pill);font-weight:600;}
/* Badge / metric */
.metric-badge{
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;background:var(--gradient-dark-card);
  color:var(--text-light);border-radius:var(--radius-lg);padding:18px 14px;min-width:110px;box-shadow:var(--shadow-card);
  border:1px solid rgba(245,166,35,0.18);
}
.metric-badge .num{font-family:var(--font-num);font-size:2.2rem;font-weight:700;color:var(--accent-gold);line-height:1.2;}
.metric-badge .label{font-size:0.85rem;color:var(--text-muted);margin-top:4px;text-align:center;}
/* Step list */
.steps-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.step-item{
  background:var(--bg-card);border-radius:var(--radius-lg);padding:24px 22px;display:flex;gap:18px;align-items:flex-start;
  border:1px solid var(--border-soft);box-shadow:var(--shadow-card);
}
.step-number{
  flex-shrink:0;width:44px;height:44px;border-radius:50%;background:var(--gradient-accent);color:#fff;display:flex;
  align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;
}
.step-item h3{font-size:1.15rem;font-weight:800;margin-bottom:8px;color:var(--text-main);}
.step-item p{color:var(--text-soft);font-size:0.95rem;line-height:1.65;margin:0;}
/* FAQ */
.faq-list{max-width:800px;margin:0 auto;}
.faq-item{background:var(--bg-card);border-radius:var(--radius-md);margin-bottom:14px;box-shadow:var(--shadow-card);border:1px solid var(--border-soft);overflow:hidden;}
.faq-question{
  background:none;border:none;width:100%;text-align:left;padding:18px 22px;font-size:1.05rem;font-weight:800;color:var(--text-main);
  cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition-base);
}
.faq-question:hover{background:rgba(245,166,35,0.04);}
.faq-question .icon{margin-left:12px;color:var(--accent-gold);transition:var(--transition-base);}
.faq-answer{padding:0 22px 18px;color:var(--text-soft);font-size:0.98rem;line-height:1.75;display:none;}
.faq-item.open .faq-question{background:rgba(245,166,35,0.06);}
.faq-item.open .faq-question .icon{transform:rotate(180deg);}
.faq-item.open .faq-answer{display:block;}
/* CTA */
.cta-band{
  background:var(--gradient-brand);border-radius:var(--radius-lg);padding:40px 28px;color:var(--text-light);
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-band h3{font-size:1.7rem;font-weight:800;color:#fff;margin-bottom:8px;}
.cta-band p{color:var(--text-muted);margin:0;max-width:560px;}
.btn-primary{
  display:inline-flex;align-items:center;gap:10px;background:var(--gradient-accent);color:#fff;border:none;border-radius:var(--radius-pill);
  padding:14px 28px;font-weight:700;font-size:1rem;cursor:pointer;transition:var(--transition-base);box-shadow:0 6px 18px rgba(245,166,35,0.25);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(245,166,35,0.35);color:#fff;}
.btn-outline{
  display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--accent-gold);border:1px solid var(--accent-gold);
  border-radius:var(--radius-pill);padding:12px 24px;font-weight:700;font-size:0.95rem;cursor:pointer;transition:var(--transition-base);
}
.btn-outline:hover{background:var(--accent-gold);color:var(--primary-deep);}
/* Footer */
.site-footer{background:var(--primary-dark);color:var(--text-muted);padding:40px 0 28px;border-top:1px solid rgba(245,166,35,0.2);}
.footer-container{padding-bottom:20px;border-bottom:1px solid rgba(245,166,35,0.1);margin-bottom:18px;}
.footer-brand{font-size:1.4rem;font-weight:800;color:var(--text-light);margin-bottom:10px;}
.footer-desc{font-size:0.95rem;line-height:1.75;color:var(--text-muted);}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:18px;justify-content:flex-end;}
.footer-links li a{color:var(--text-muted);font-size:0.95rem;}
.footer-links li a:hover{color:var(--accent-gold);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;align-items:center;font-size:0.85rem;color:var(--text-muted);}
.footer-bottom a{color:var(--text-muted);}
.footer-bottom a:hover{color:var(--accent-gold);}
/* Responsive */
@media screen and (max-width:1024px){
  section{padding:var(--space-section-mobile) 0;}
  .trend-grid{grid-template-columns:repeat(2,1fr);}
}
@media screen and (max-width:768px){
  .mobile-menu-toggle{display:block;}
  .main-nav{
    display:none;position:absolute;top:100%;left:0;right:0;background:rgba(26,15,46,0.98);flex-direction:column;align-items:stretch;
    padding:12px 20px;gap:4px;border-bottom:1px solid rgba(245,166,35,0.22);
  }
  .main-nav.open{display:flex;}
  .main-nav a{padding:12px 16px;font-size:1.05rem;}
  .steps-list{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;text-align:center;}
  .cta-band h3{font-size:1.4rem;}
  .footer-links{justify-content:center;margin-top:16px;}
  .footer-bottom{flex-direction:column;text-align:center;}
}
@media screen and (max-width:520px){
  .trend-grid{grid-template-columns:1fr;}
  .category-head .section-title{font-size:1.8rem;}
  .section-title{font-size:1.6rem;}
  .container{padding-left:16px;padding-right:16px;}
}

/* roulang page: category1 */
:root {
            --primary-deep: #1a0f2e;
            --primary-mid: #2d1b4e;
            --primary-dark: #0e0a1a;
            --accent-gold: #f5a623;
            --accent-orange: #ff7a45;
            --accent-amber: #ffc107;
            --bg-warm: #faf6f0;
            --bg-card: #fffdf8;
            --bg-dark-section: #1e1430;
            --text-main: #2b2235;
            --text-soft: #6b5d78;
            --text-light: #f5ede4;
            --text-muted: #a89bb8;
            --border-soft: #eadfce;
            --border-glow: rgba(245, 166, 35, 0.35);
            --shadow-card: 0 8px 28px rgba(30, 20, 48, 0.08);
            --shadow-hover: 0 16px 42px rgba(30, 20, 48, 0.16);
            --radius-lg: 22px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --gradient-brand: linear-gradient(135deg, #1a0f2e 0%, #3a1d5e 40%, #7a2d5e 70%, #c85a3a 100%);
            --gradient-accent: linear-gradient(135deg, #f5a623 0%, #ff7a45 55%, #ffb347 100%);
            --gradient-hero: linear-gradient(135deg, rgba(18, 10, 30, 0.92) 0%, rgba(45, 27, 78, 0.88) 40%, rgba(90, 35, 75, 0.78) 70%, rgba(200, 90, 58, 0.65) 100%);
            --gradient-dark-card: linear-gradient(145deg, #231636 0%, #2d1b4e 100%);
            --space-section: 96px;
            --space-section-mobile: 56px;
            --font-num: 'Georgia', 'Times New Roman', serif;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-warm);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--accent-orange);
            text-decoration: none;
            outline: none;
        }

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

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

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container-fluid {
            max-width: 100%;
            padding-left: 0;
            padding-right: 0;
        }

        section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-alt {
            background-color: #f3ecdf;
        }

        .section-dark {
            background-color: var(--bg-dark-section);
            color: var(--text-light);
        }

        .section-dark .section-title {
            color: var(--text-light);
        }

        .section-dark .section-sub {
            color: var(--text-muted);
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-gold);
            font-weight: 700;
            margin-bottom: 14px;
            padding: 4px 14px;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.06);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.32;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .section-sub {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-soft);
            max-width: 760px;
            margin-bottom: 36px;
        }

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

        .text-gradient {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(26, 15, 46, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(245, 166, 35, 0.22);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: var(--transition-base);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo span {
            color: var(--accent-gold);
        }

        .brand-logo:hover,
        .brand-logo:focus {
            color: var(--text-light);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-muted);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .main-nav a:hover,
        .main-nav a:focus {
            color: var(--text-light);
            background: rgba(245, 166, 35, 0.12);
        }

        .main-nav a.active {
            color: var(--accent-gold);
            background: rgba(245, 166, 35, 0.1);
            border-bottom: 2px solid var(--accent-gold);
            border-radius: var(--radius-pill) var(--radius-pill) 0 0;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(245, 166, 35, 0.4);
            color: var(--text-light);
            font-size: 1.3rem;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(245, 166, 35, 0.15);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(14, 10, 26, 0.97);
            z-index: 99;
            padding: 80px 24px 40px;
        }

        .mobile-nav-overlay.open {
            display: block;
        }

        .mobile-nav-overlay .main-nav-mobile {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-nav-overlay .main-nav-mobile a {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-light);
            padding: 14px 8px;
            border-bottom: 1px solid rgba(245, 166, 35, 0.15);
            text-align: left;
            display: block;
        }

        .mobile-nav-overlay .main-nav-mobile a.active {
            color: var(--accent-gold);
        }

        /* ========== Hero Classified ========== */
        .category-hero {
            background: var(--gradient-hero), url('/assets/images/fd8c86aab29b360c.webp') no-repeat center center / cover;
            background-blend-mode: overlay;
            padding: 72px 0 56px;
            color: var(--text-light);
            position: relative;
        }

        .category-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .category-hero .breadcrumb a {
            color: var(--text-muted);
        }

        .category-hero .breadcrumb a:hover {
            color: var(--accent-gold);
        }

        .category-hero .breadcrumb .separator {
            color: rgba(168, 155, 184, 0.5);
        }

        .category-hero .breadcrumb .current {
            color: var(--accent-gold);
            font-weight: 600;
        }

        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }

        .category-hero .hero-desc {
            font-size: 1.1rem;
            line-height: 1.8;
            color: rgba(245, 237, 228, 0.85);
            max-width: 720px;
            margin-bottom: 0;
        }

        .category-hero .hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .category-hero .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            color: var(--text-muted);
            background: rgba(245, 166, 35, 0.1);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(245, 166, 35, 0.25);
        }

        /* ========== Pill Navigation ========== */
        .pill-nav-section {
            background: var(--bg-dark-section);
            border-top: 1px solid rgba(245, 166, 35, 0.18);
            border-bottom: 1px solid rgba(245, 166, 35, 0.18);
            padding: 16px 0;
        }

        .pill-nav {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scroll-snap-type: x proximity;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 4px;
        }

        .pill-nav::-webkit-scrollbar {
            height: 3px;
        }

        .pill-nav::-webkit-scrollbar-track {
            background: rgba(245, 166, 35, 0.06);
            border-radius: var(--radius-pill);
        }

        .pill-nav::-webkit-scrollbar-thumb {
            background: rgba(245, 166, 35, 0.35);
            border-radius: var(--radius-pill);
        }

        .pill-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.08);
            color: var(--text-muted);
            font-weight: 600;
            font-size: 0.94rem;
            white-space: nowrap;
            scroll-snap-align: start;
            transition: var(--transition-base);
            border: 1px solid transparent;
        }

        .pill-nav a:hover,
        .pill-nav a:focus {
            background: rgba(245, 166, 35, 0.16);
            color: var(--text-light);
            border-color: var(--border-glow);
        }

        .pill-nav a.active {
            background: var(--gradient-accent);
            color: #1a0f2e;
            border-color: transparent;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
        }

        /* ========== Article Cards ========== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: 1px solid var(--border-soft);
            display: flex;
            flex-direction: column;
        }

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

        .article-card .card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

        .article-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .article-card:hover .card-img img {
            transform: scale(1.05);
        }

        .article-card .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(26, 15, 46, 0.85);
            color: var(--accent-gold);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            backdrop-filter: blur(6px);
        }

        .article-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card .card-title {
            font-size: 1.12rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 10px;
            letter-spacing: -0.005em;
        }

        .article-card .card-summary {
            font-size: 0.92rem;
            line-height: 1.65;
            color: var(--text-soft);
            margin-bottom: 16px;
            flex: 1;
        }

        .article-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--border-soft);
        }

        .article-card .card-meta .read-more {
            color: var(--accent-gold);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== Data Badge Section ========== */
        .badge-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .badge-card {
            background: var(--gradient-dark-card);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            border: 1px solid rgba(245, 166, 35, 0.2);
            transition: var(--transition-base);
        }

        .badge-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-hover);
        }

        .badge-card .badge-number {
            font-family: var(--font-num);
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            margin-bottom: 6px;
        }

        .badge-card .badge-label {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 4px;
        }

        .badge-card .badge-sub {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ========== Step Timeline ========== */
        .step-timeline {
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: relative;
            padding-left: 40px;
        }

        .step-timeline::before {
            content: '';
            position: absolute;
            left: 18px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--gradient-accent);
            border-radius: 2px;
        }

        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 22px 26px;
            position: relative;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-soft);
            transition: var(--transition-base);
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
        }

        .step-item::before {
            content: attr(data-step);
            position: absolute;
            left: -40px;
            top: 20px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gradient-accent);
            color: #1a0f2e;
            font-weight: 800;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            box-shadow: 0 4px 12px rgba(245, 166, 35, 0.35);
        }

        .step-item .step-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .step-item .step-desc {
            font-size: 0.92rem;
            color: var(--text-soft);
            line-height: 1.65;
        }

        /* ========== FAQ Accordion ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card);
        }

        .faq-btn {
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 1.0rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition-base);
        }

        .faq-btn:hover {
            color: var(--accent-gold);
        }

        .faq-btn .faq-icon {
            flex-shrink: 0;
            font-size: 0.9rem;
            color: var(--accent-gold);
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text-soft);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding-bottom: 22px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-muted);
            padding: 48px 0 28px;
            border-top: 1px solid rgba(245, 166, 35, 0.2);
        }

        .footer-container {
            margin-bottom: 28px;
        }

        .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
        }

        .footer-brand span {
            color: var(--accent-gold);
        }

        .footer-desc {
            font-size: 0.92rem;
            line-height: 1.75;
            color: var(--text-muted);
            max-width: 420px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
            gap: 8px 16px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition-base);
        }

        .footer-links a:hover,
        .footer-links a:focus {
            color: var(--accent-gold);
        }

        .footer-links a::before {
            content: '›';
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(245, 166, 35, 0.12);
            font-size: 0.82rem;
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

        .footer-bottom a:hover {
            color: var(--accent-gold);
        }

        /* ========== Responsive ========== */
        @media screen and (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media screen and (max-width: 768px) {
            .main-nav {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

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

            .badge-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .category-hero h1 {
                font-size: 1.9rem;
            }

            .category-hero .hero-desc {
                font-size: 1rem;
            }

            section {
                padding: var(--space-section-mobile) 0;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .step-timeline {
                padding-left: 32px;
            }

            .step-timeline::before {
                left: 14px;
            }

            .step-item::before {
                left: -32px;
                width: 28px;
                height: 28px;
                font-size: 0.82rem;
            }

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

        @media screen and (max-width: 520px) {
            .category-hero {
                padding: 48px 0 40px;
            }

            .category-hero h1 {
                font-size: 1.6rem;
            }

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

            .badge-card .badge-number {
                font-size: 2rem;
            }

            .article-card .card-img {
                height: 160px;
            }

            .pill-nav a {
                padding: 8px 16px;
                font-size: 0.85rem;
            }

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

/* roulang page: category4 */
:root {
            --primary-deep: #1a0f2e;
            --primary-mid: #2d1b4e;
            --primary-dark: #0e0a1a;
            --accent-gold: #f5a623;
            --accent-orange: #ff7a45;
            --accent-amber: #ffc107;
            --bg-warm: #faf6f0;
            --bg-card: #fffdf8;
            --bg-dark-section: #1e1430;
            --text-main: #2b2235;
            --text-soft: #6b5d78;
            --text-light: #f5ede4;
            --text-muted: #a89bb8;
            --border-soft: #eadfce;
            --border-glow: rgba(245, 166, 35, 0.35);
            --shadow-card: 0 8px 28px rgba(30, 20, 48, 0.08);
            --shadow-hover: 0 16px 42px rgba(30, 20, 48, 0.16);
            --radius-lg: 22px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --gradient-brand: linear-gradient(135deg, #1a0f2e 0%, #3a1d5e 40%, #7a2d5e 70%, #c85a3a 100%);
            --gradient-accent: linear-gradient(135deg, #f5a623 0%, #ff7a45 55%, #ffb347 100%);
            --gradient-hero: linear-gradient(135deg, rgba(18, 10, 30, 0.92) 0%, rgba(45, 27, 78, 0.88) 40%, rgba(90, 35, 75, 0.78) 70%, rgba(200, 90, 58, 0.65) 100%);
            --gradient-dark-card: linear-gradient(145deg, #231636 0%, #2d1b4e 100%);
            --space-section: 96px;
            --space-section-mobile: 56px;
            --font-num: 'Georgia', 'Times New Roman', serif;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-warm);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--accent-orange);
            text-decoration: none;
            outline: none;
        }

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

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

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-alt {
            background-color: #f3ecdf;
        }

        .section-dark {
            background-color: var(--bg-dark-section);
            color: var(--text-light);
        }

        .section-dark .section-title {
            color: var(--text-light);
        }

        .section-dark .section-sub {
            color: var(--text-muted);
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-gold);
            font-weight: 700;
            margin-bottom: 14px;
            padding: 4px 14px;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.06);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.32;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .section-sub {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-soft);
            max-width: 760px;
            margin-bottom: 36px;
        }

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

        .text-gradient {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(26, 15, 46, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(245, 166, 35, 0.22);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: var(--transition-base);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: 0.02em;
        }

        .brand-logo span {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            position: relative;
            display: inline-block;
            padding: 8px 0;
            font-size: 0.96rem;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.02em;
            transition: var(--transition-base);
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent-gold);
            transition: width 0.25s ease;
        }

        .main-nav a:hover,
        .main-nav a:focus {
            color: var(--text-light);
        }

        .main-nav a:hover::after,
        .main-nav a:focus::after {
            width: 100%;
        }

        .main-nav a.active {
            color: var(--accent-gold);
        }

        .main-nav a.active::after {
            width: 100%;
            background: var(--accent-gold);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-glow);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            color: var(--text-light);
            font-size: 1.4rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(245, 166, 35, 0.1);
        }

        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(14, 10, 26, 0.96);
            z-index: 200;
            display: none;
            flex-direction: column;
            padding: 24px;
            gap: 10px;
        }

        .mobile-menu-overlay.is-open {
            display: flex;
        }

        .mobile-menu-overlay .close-btn {
            align-self: flex-end;
            background: transparent;
            border: none;
            color: var(--text-light);
            font-size: 2rem;
            cursor: pointer;
        }

        .mobile-menu-overlay a {
            color: var(--text-light);
            font-size: 1.2rem;
            font-weight: 600;
            padding: 14px 0;
            border-bottom: 1px solid rgba(245, 166, 35, 0.15);
            transition: var(--transition-base);
        }

        .mobile-menu-overlay a:hover,
        .mobile-menu-overlay a.active {
            color: var(--accent-gold);
        }

        /* ========== Category Hero ========== */
        .category-hero {
            position: relative;
            padding: 80px 0 60px;
            background-image: var(--gradient-hero), url('/assets/images/fd8c86aab29b360c.webp');
            background-size: cover;
            background-position: center;
            color: var(--text-light);
            border-bottom: 1px solid rgba(245, 166, 35, 0.2);
        }

        .category-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .category-hero .breadcrumb a {
            color: var(--accent-gold);
        }

        .category-hero .breadcrumb .separator {
            opacity: 0.5;
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .category-hero .sub-text {
            font-size: 1.15rem;
            line-height: 1.75;
            color: var(--text-muted);
            max-width: 720px;
        }

        /* ========== Card & List ========== */
        .strategy-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .strategy-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
        }

        .strategy-card .card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #eae1d2;
        }

        .strategy-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .strategy-card:hover .card-img img {
            transform: scale(1.06);
        }

        .strategy-card .card-body {
            padding: 26px 24px 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .strategy-card .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }

        .strategy-card .card-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-gold);
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.02em;
        }

        .strategy-card h3 {
            font-size: 1.25rem;
            font-weight: 800;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .strategy-card .card-summary {
            font-size: 0.96rem;
            line-height: 1.7;
            color: var(--text-soft);
            margin-bottom: 18px;
            flex: 1;
        }

        .strategy-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .strategy-card .card-meta .read-more {
            font-weight: 700;
            color: var(--accent-gold);
        }

        .badge-num {
            display: inline-flex;
            align-items: baseline;
            gap: 4px;
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            font-weight: 800;
        }

        .badge-num .num {
            font-family: var(--font-num);
            font-size: 2.2rem;
            line-height: 1;
        }

        .badge-num .unit {
            font-size: 0.9rem;
            font-weight: 700;
        }

        /* ========== Stat Badge / Data ========== */
        .stat-badge {
            background: var(--gradient-dark-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            color: var(--text-light);
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(245, 166, 35, 0.15);
            transition: var(--transition-base);
        }

        .stat-badge:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
        }

        .stat-badge .stat-value {
            font-family: var(--font-num);
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--accent-gold);
            margin-bottom: 8px;
        }

        .stat-badge .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
            font-weight: 600;
        }

        /* ========== Button ========== */
        .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gradient-accent);
            color: var(--primary-dark);
            font-weight: 800;
            padding: 14px 28px;
            border-radius: var(--radius-pill);
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            letter-spacing: 0.02em;
            box-shadow: 0 6px 18px rgba(245, 166, 35, 0.28);
        }

        .btn-brand:hover,
        .btn-brand:focus {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(245, 166, 35, 0.38);
            color: var(--primary-dark);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            font-weight: 700;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-glow);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .btn-outline:hover,
        .btn-outline:focus {
            background: rgba(245, 166, 35, 0.1);
            border-color: var(--accent-gold);
            color: var(--accent-orange);
            transform: translateY(-2px);
        }

        /* ========== List / Step ========== */
        .step-list {
            list-style: none;
            margin: 0;
            padding: 0;
            counter-reset: step-counter;
        }

        .step-list li {
            position: relative;
            padding-left: 58px;
            margin-bottom: 32px;
            counter-increment: step-counter;
        }

        .step-list li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0;
            width: 42px;
            height: 42px;
            background: var(--gradient-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: var(--primary-dark);
            font-size: 1.2rem;
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.3);
        }

        .step-list h4 {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .step-list p {
            color: var(--text-soft);
            margin: 0;
        }

        /* ========== FAQ ========== */
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            padding: 22px 24px;
            margin-bottom: 16px;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border-glow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-main);
            gap: 16px;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-gold);
            transition: var(--transition-base);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--gradient-accent);
            color: var(--primary-dark);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            color: var(--text-soft);
            line-height: 1.75;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            margin-top: 16px;
            margin-bottom: 0;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-light);
            padding: 56px 0 32px;
            margin-top: 0;
        }

        .site-footer a {
            color: var(--text-muted);
        }

        .site-footer a:hover {
            color: var(--accent-gold);
        }

        .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 12px;
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.75;
            max-width: 480px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }

        .footer-links a {
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 600;
            transition: var(--transition-base);
        }

        .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(245, 166, 35, 0.15);
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
            justify-content: space-between;
            align-items: center;
        }

        /* ========== Responsive ========== */
        @media screen and (max-width: 1024px) {
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stat-badge .stat-value {
                font-size: 2rem;
            }
        }

        @media screen and (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                display: none;
            }
            section {
                padding: var(--space-section-mobile) 0;
            }
            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.9rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.98rem;
            }
            .strategy-card .card-body {
                padding: 20px 18px 22px;
            }
            .stat-badge {
                padding: 20px 16px;
            }
            .stat-badge .stat-value {
                font-size: 1.8rem;
            }
            .step-list li {
                padding-left: 52px;
            }
            .step-list li::before {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media screen and (max-width: 520px) {
            .brand-logo {
                font-size: 1.3rem;
            }
            .nav-toggle {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn-brand,
            .btn-outline {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .footer-links {
                gap: 12px;
            }
        }

/* roulang page: category3 */
:root {
            --primary-deep: #1a0f2e;
            --primary-mid: #2d1b4e;
            --primary-dark: #0e0a1a;
            --accent-gold: #f5a623;
            --accent-orange: #ff7a45;
            --accent-amber: #ffc107;
            --bg-warm: #faf6f0;
            --bg-card: #fffdf8;
            --bg-dark-section: #1e1430;
            --text-main: #2b2235;
            --text-soft: #6b5d78;
            --text-light: #f5ede4;
            --text-muted: #a89bb8;
            --border-soft: #eadfce;
            --border-glow: rgba(245, 166, 35, 0.35);
            --shadow-card: 0 8px 28px rgba(30, 20, 48, 0.08);
            --shadow-hover: 0 16px 42px rgba(30, 20, 48, 0.16);
            --radius-lg: 22px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --gradient-brand: linear-gradient(135deg, #1a0f2e 0%, #3a1d5e 40%, #7a2d5e 70%, #c85a3a 100%);
            --gradient-accent: linear-gradient(135deg, #f5a623 0%, #ff7a45 55%, #ffb347 100%);
            --gradient-hero: linear-gradient(135deg, rgba(18, 10, 30, 0.92) 0%, rgba(45, 27, 78, 0.88) 40%, rgba(90, 35, 75, 0.78) 70%, rgba(200, 90, 58, 0.65) 100%);
            --gradient-dark-card: linear-gradient(145deg, #231636 0%, #2d1b4e 100%);
            --space-section: 96px;
            --space-section-mobile: 56px;
            --font-num: 'Georgia', 'Times New Roman', serif;
            --transition-base: all 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-warm);
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover,
        a:focus {
            color: var(--accent-orange);
            text-decoration: none;
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        section {
            padding: var(--space-section) 0;
            position: relative;
        }
        .section-alt {
            background-color: #f3ecdf;
        }
        .section-dark {
            background-color: var(--bg-dark-section);
            color: var(--text-light);
        }
        .section-dark .section-title {
            color: var(--text-light);
        }
        .section-dark .section-sub {
            color: var(--text-muted);
        }
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-gold);
            font-weight: 700;
            margin-bottom: 14px;
            padding: 4px 14px;
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-pill);
            background: rgba(245, 166, 35, 0.06);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.32;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .section-sub {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-soft);
            max-width: 760px;
            margin-bottom: 36px;
        }
        .text-accent {
            color: var(--accent-gold);
        }
        .text-gradient {
            background: var(--gradient-accent);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(26, 15, 46, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(245, 166, 35, 0.22);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
            transition: var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            padding-bottom: 12px;
            flex-wrap: wrap;
            gap: 10px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--gradient-accent);
            border-radius: 10px;
            font-size: 1rem;
            color: var(--primary-deep);
            font-weight: 900;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 4px;
            border-bottom: 2px solid transparent;
            transition: var(--transition-base);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--text-light);
            border-bottom-color: var(--accent-gold);
        }
        .main-nav a.active {
            color: var(--accent-gold);
            border-bottom-color: var(--accent-gold);
            font-weight: 700;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(245, 166, 35, 0.35);
            color: var(--text-light);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            cursor: pointer;
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }
        .nav-toggle:hover {
            background: rgba(245, 166, 35, 0.12);
            border-color: var(--accent-gold);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            padding: 20px 0 0;
            font-size: 0.9rem;
            color: var(--text-soft);
        }
        .breadcrumb-wrap a {
            color: var(--text-soft);
        }
        .breadcrumb-wrap a:hover {
            color: var(--accent-gold);
        }
        .breadcrumb-wrap .separator {
            margin: 0 8px;
            color: var(--border-soft);
        }

        /* ========== Category Hero / H1 ========== */
        .category-hero {
            padding: 40px 0 32px;
            background: transparent;
        }
        .category-hero .h1-wrap {
            display: flex;
            align-items: flex-start;
            gap: 24px;
            flex-wrap: wrap;
        }
        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.28;
            color: var(--text-main);
            margin: 0 0 12px;
            letter-spacing: -0.015em;
            flex: 1 1 auto;
            min-width: 0;
        }
        .category-hero .h1-badge {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245, 166, 35, 0.1);
            color: var(--accent-gold);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 0.9rem;
            border: 1px solid var(--border-glow);
            white-space: nowrap;
        }
        .category-summary {
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--text-soft);
            max-width: 860px;
            margin-top: 8px;
        }

        /* ========== Concept Cards ========== */
        .concept-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 10px;
        }
        .concept-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .concept-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gradient-accent);
            opacity: 0.85;
        }
        .concept-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--border-glow);
        }
        .concept-card .icon-box {
            width: 46px;
            height: 46px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: var(--gradient-dark-card);
            color: var(--accent-gold);
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .concept-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .concept-card p {
            font-size: 0.93rem;
            color: var(--text-soft);
            line-height: 1.65;
            margin: 0;
        }

        /* ========== Article Cards ========== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
            border-color: var(--border-glow);
        }
        .article-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-mid);
        }
        .article-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .article-card:hover .card-img img {
            transform: scale(1.04);
        }
        .article-card .card-img .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(18, 10, 30, 0.7) 100%);
        }
        .article-card .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(26, 15, 46, 0.85);
            color: var(--accent-gold);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(245, 166, 35, 0.3);
        }
        .article-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-body h3 {
            font-size: 1.08rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .article-card .card-body h3 a {
            color: var(--text-main);
        }
        .article-card .card-body h3 a:hover {
            color: var(--accent-gold);
        }
        .article-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.6;
            margin-bottom: 14px;
            flex: 1;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-soft);
        }
        .article-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== Steps ========== */
        .step-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            position: relative;
            transition: var(--transition-base);
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .step-item .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-accent);
            color: var(--primary-deep);
            font-weight: 900;
            font-size: 1.1rem;
            margin-bottom: 16px;
            font-family: var(--font-num);
        }
        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== Misconceptions ========== */
        .miscon-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .miscon-card {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .miscon-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
        }
        .miscon-card .miscon-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 700;
        }
        .miscon-card .miscon-icon.wrong {
            background: rgba(255, 122, 69, 0.12);
            color: var(--accent-orange);
        }
        .miscon-card .miscon-icon.right {
            background: rgba(245, 166, 35, 0.12);
            color: var(--accent-gold);
        }
        .miscon-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .miscon-card p {
            font-size: 0.9rem;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            text-align: left;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--accent-gold);
        }
        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 0.8rem;
            transition: var(--transition-base);
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
            background: var(--gradient-accent);
            color: var(--primary-deep);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 280px;
            padding: 0 22px 20px;
        }
        .faq-answer p {
            font-size: 0.93rem;
            color: var(--text-soft);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== CTA / More ========== */
        .more-cta-wrap {
            text-align: center;
            background: var(--gradient-dark-card);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            border: 1px solid rgba(245, 166, 35, 0.22);
            box-shadow: var(--shadow-card);
        }
        .more-cta-wrap h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .more-cta-wrap p {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gradient-accent);
            color: var(--primary-deep);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
        }
        .btn-primary:hover {
            color: var(--primary-deep);
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(245, 166, 35, 0.35);
            filter: brightness(1.05);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 24px;
            border-radius: var(--radius-pill);
            border: 1.5px solid var(--accent-gold);
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
        }
        .btn-secondary:hover {
            background: var(--accent-gold);
            color: var(--primary-deep);
            transform: translateY(-2px);
        }

        /* ========== Data Badges ========== */
        .data-badge-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .data-badge-card {
            background: var(--gradient-dark-card);
            border-radius: var(--radius-lg);
            padding: 26px 20px;
            text-align: center;
            border: 1px solid rgba(245, 166, 35, 0.2);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .data-badge-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
        }
        .data-badge-card .badge-value {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-gold);
            font-family: var(--font-num);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .data-badge-card .badge-unit {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .data-badge-card .badge-label {
            font-size: 0.9rem;
            color: var(--text-light);
            font-weight: 600;
            margin-top: 8px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-muted);
            padding: 56px 0 28px;
            border-top: 1px solid rgba(245, 166, 35, 0.15);
        }
        .footer-container {
            margin-bottom: 36px;
        }
        .footer-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .footer-desc {
            font-size: 0.92rem;
            line-height: 1.75;
            color: var(--text-muted);
            max-width: 420px;
            margin: 0;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            justify-content: flex-end;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(245, 166, 35, 0.12);
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--accent-gold);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root {
                --space-section: 72px;
            }
            .concept-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-badge-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space-section: 56px;
            }
            .site-header .container {
                padding-top: 10px;
                padding-bottom: 10px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 8px;
                padding: 16px 0 8px;
                border-top: 1px solid rgba(245, 166, 35, 0.15);
                margin-top: 10px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 8px 4px;
                font-size: 1rem;
                width: 100%;
            }
            .category-hero {
                padding: 28px 0 20px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-summary {
                font-size: 1rem;
            }
            .concept-grid {
                grid-template-columns: 1fr;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .step-list {
                grid-template-columns: 1fr;
            }
            .miscon-wrap {
                grid-template-columns: 1fr;
            }
            .data-badge-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .more-cta-wrap {
                padding: 32px 20px;
            }
            .more-cta-wrap h2 {
                font-size: 1.4rem;
            }
            .footer-links {
                justify-content: flex-start;
                margin-top: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .data-badge-grid {
                grid-template-columns: 1fr;
            }
            .data-badge-card .badge-value {
                font-size: 1.8rem;
            }
            .article-card .card-body {
                padding: 16px 16px 18px;
            }
            .concept-card {
                padding: 20px 16px;
            }
            .step-item {
                padding: 22px 18px;
            }
            .miscon-card {
                padding: 16px;
                flex-direction: column;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            .btn-primary {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }