/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #FF6B00;
            --primary-hover: #E55E00;
            --primary-light: #FFF0E0;
            --accent: #FFD600;
            --accent-hover: #E6C200;
            --dark: #1E1E1E;
            --dark-soft: #2A2A2A;
            --dark-mid: #3A3A3A;
            --text-primary: #1E1E1E;
            --text-secondary: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --bg-light: #F5F5F5;
            --bg-white: #FFFFFF;
            --border-light: #E8E8E8;
            --border-focus: #FF6B00;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 50px;
            --font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }
        h1 { font-size: clamp(2rem, 5vw, 3rem); }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
        h3 { font-size: clamp(1.15rem, 2.2vw, 1.5rem); }
        p { margin-bottom: 0.5rem; }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
            color: var(--dark);
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-top: 12px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-bg-dark {
            background: var(--dark);
            color: var(--text-white);
        }
        .section-bg-dark .section-title h2 { color: var(--text-white); }
        .section-bg-dark .section-title p { color: rgba(255,255,255,0.7); }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.3);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 24px rgba(0,0,0,0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            padding: 0 24px;
            height: 100%;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .logo i { font-size: 1.15rem; color: var(--accent); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(255,255,255,0.6);
            padding: 4px 6px;
            border-radius: var(--radius-full);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.5);
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover { color: var(--primary); background: rgba(255,107,0,0.08); }
        .nav-list a.active { color: var(--text-white); background: var(--primary); font-weight: 600; }
        .nav-cta {
            background: var(--primary) !important;
            color: var(--text-white) !important;
            padding: 8px 22px !important;
            font-weight: 600 !important;
            border-radius: var(--radius-full) !important;
        }
        .nav-cta:hover { background: var(--primary-hover) !important; color: var(--text-white) !important; transform: scale(1.02); }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: rgba(255,255,255,0.8);
            border-radius: 12px;
            border: 1px solid var(--border-light);
            cursor: pointer;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* 移动端导航 */
        .mobile-menu {
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            padding: 24px 20px 32px;
            transform: translateY(-120%);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            z-index: 999;
            overflow-y: auto;
            max-height: calc(100vh - var(--header-h));
        }
        .mobile-menu.open { transform: translateY(0); opacity: 1; }
        .mobile-menu a {
            display: block;
            padding: 14px 18px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a:hover { background: var(--primary-light); color: var(--primary); }
        .mobile-menu a.active { color: var(--primary); font-weight: 700; background: var(--primary-light); }
        .mobile-menu .nav-cta-mobile {
            margin-top: 16px;
            background: var(--primary);
            color: var(--text-white) !important;
            text-align: center;
            font-weight: 700;
            border-radius: var(--radius-full);
            border: none;
        }
        .mobile-menu .nav-cta-mobile:hover { background: var(--primary-hover); }

        @media (max-width: 768px) {
            .nav-list { display: none; }
            .hamburger { display: flex; }
            .header-inner { padding: 0 16px; }
        }
        @media (min-width: 769px) {
            .mobile-menu { display: none !important; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: var(--dark);
            margin-top: calc(var(--header-h) * -1);
            padding-top: var(--header-h);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.55;
            transform: scale(1.05);
            transition: transform 0.2s;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,30,30,0.75) 0%, rgba(30,30,30,0.35) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--text-white);
            max-width: 820px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255,107,0,0.25);
            backdrop-filter: blur(8px);
            padding: 6px 20px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent);
            border: 1px solid rgba(255,214,0,0.25);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero h1 {
            font-size: clamp(2.2rem, 6vw, 3.6rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255,255,255,0.85);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,0,0.35); }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.7); transform: translateY(-2px); }
        .btn-accent {
            background: var(--accent);
            color: var(--dark);
            border-color: var(--accent);
        }
        .btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,214,0,0.35); }

        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent);
            display: block;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.65);
            margin-top: 4px;
        }

        /* ===== 痛点板块 ===== */
        .pain-points {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 10px;
        }
        .pain-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .pain-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .pain-card .icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }
        .pain-card h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--dark); }
        .pain-card p { color: var(--text-secondary); font-size: 0.95rem; }
        @media (max-width: 768px) {
            .pain-points { grid-template-columns: 1fr; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .pain-points { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== 解决方案 ===== */
        .solutions-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 28px;
            align-items: stretch;
        }
        .solutions-grid .col-right {
            display: grid;
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .sol-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .sol-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .sol-card .icon { font-size: 2rem; color: var(--primary); margin-bottom: 14px; }
        .sol-card h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--dark); }
        .sol-card p { color: var(--text-secondary); font-size: 0.95rem; flex: 1; }
        .sol-card .tag {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            align-self: flex-start;
        }
        .sol-featured {
            background: linear-gradient(135deg, var(--primary) 0%, #FF8A3C 100%);
            color: var(--text-white);
            border-color: transparent;
            justify-content: center;
        }
        .sol-featured .icon { color: var(--text-white); }
        .sol-featured h3 { color: var(--text-white); }
        .sol-featured p { color: rgba(255,255,255,0.85); }
        .sol-featured .tag { background: rgba(255,255,255,0.2); color: var(--text-white); }
        @media (max-width: 768px) {
            .solutions-grid { grid-template-columns: 1fr; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .solutions-grid { grid-template-columns: 1fr 1fr; }
        }

        /* ===== 成果/数据 ===== */
        .results-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 20px;
        }
        .result-card {
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            padding: 36px 20px;
            text-align: center;
            border: 1px solid rgba(255,255,255,0.08);
            transition: all var(--transition);
            backdrop-filter: blur(4px);
        }
        .result-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-4px); border-color: rgba(255,107,0,0.3); }
        .result-card .num {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--accent);
            display: block;
            line-height: 1.1;
        }
        .result-card .num span { font-size: 1.2rem; color: rgba(255,214,0,0.6); }
        .result-card .label { color: rgba(255,255,255,0.75); font-size: 0.95rem; margin-top: 8px; }
        @media (max-width: 768px) {
            .results-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 480px) {
            .results-grid { grid-template-columns: 1fr; }
        }

        /* ===== 客户证言 ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .testimonial-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .testimonial-card .stars {
            color: var(--accent);
            font-size: 0.95rem;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }
        .testimonial-card .quote {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
            font-style: italic;
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .testimonial-card .name { font-weight: 600; font-size: 0.95rem; color: var(--dark); }
        .testimonial-card .role { font-size: 0.8rem; color: var(--text-light); }
        @media (max-width: 768px) {
            .testimonials-grid { grid-template-columns: 1fr; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== 资讯列表 ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .post-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 2rem;
            overflow: hidden;
        }
        .post-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
        .post-card .body { padding: 20px 20px 18px; flex: 1; display: flex; flex-direction: column; }
        .post-card .cat {
            display: inline-block;
            padding: 2px 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .post-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark);
            line-height: 1.4;
        }
        .post-card h3 a { color: inherit; }
        .post-card h3 a:hover { color: var(--primary); }
        .post-card .excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .post-card .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
            margin-top: auto;
        }
        .post-card .meta i { margin-right: 4px; }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 2px dashed var(--border-light);
            color: var(--text-light);
        }
        .posts-empty i { font-size: 2.4rem; display: block; margin-bottom: 12px; color: var(--border-light); }
        .posts-empty p { font-size: 1rem; }
        @media (max-width: 768px) {
            .posts-grid { grid-template-columns: 1fr; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            font-weight: 600;
            color: var(--dark);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(255,107,0,0.04); }
        .faq-question .icon {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-question .icon { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #FF8A3C 50%, var(--accent) 100%);
            padding: 80px 0;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
            font-size: 1.05rem;
            padding: 16px 40px;
        }
        .cta-section .btn:hover { background: rgba(255,255,255,0.9); transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: var(--primary); font-size: 1.3rem; margin-bottom: 14px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.55);
            transition: all var(--transition);
        }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-col .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            padding: 4px 0;
            color: rgba(255,255,255,0.55);
        }
        .footer-col .contact-item i { color: var(--primary); width: 16px; }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .section { padding: 48px 0; }
            .section-title { margin-bottom: 32px; }
            .hero-stats { gap: 20px; }
            .hero-stat .num { font-size: 1.5rem; }
        }
        @media (max-width: 768px) and (min-width: 481px) {
            .hero h1 { font-size: 2.2rem; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-8 { gap: 8px; }

        /* 占位色块 fallback */
        .img-placeholder {
            background: linear-gradient(135deg, #E0E0E0, #F0F0F0);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #aaa;
            font-size: 0.85rem;
        }

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

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #FF6B00;
            --primary-dark: #E05E00;
            --primary-light: #FF8C33;
            --secondary: #FFD600;
            --accent: #E53935;
            --bg-dark: #1E1E1E;
            --bg-dark-alt: #2A2A2A;
            --bg-light: #F5F5F5;
            --bg-card: #FFFFFF;
            --text-dark: #1E1E1E;
            --text-body: #333333;
            --text-muted: #777777;
            --text-light: #FFFFFF;
            --text-light-muted: #CCCCCC;
            --border: #E8E8E8;
            --border-light: #F0F0F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 30px;
            --radius-full: 50px;
            --shadow-sm: 0 2px 10px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.15);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --gap: 24px;
            --gap-lg: 40px;
            --gap-xl: 60px;
            --nav-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); line-height: 1.3; font-weight: 700; }
        p { margin-bottom: 1em; }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section { padding: var(--gap-xl) 0; }
        .section-title {
            font-size: 32px;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-sub {
            text-align: center;
            color: var(--text-muted);
            font-size: 17px;
            max-width: 640px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }
        .text-center { text-align: center; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-sans);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255,107,0,0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(255,107,0,0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active { transform: scale(0.97); }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-secondary:active { transform: scale(0.97); }
        .btn-lg { padding: 16px 44px; font-size: 18px; }
        .btn-block { width: 100%; justify-content: center; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 0 20px;
            pointer-events: none;
        }
        .site-header .container {
            pointer-events: auto;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius-full);
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            box-shadow: 0 4px 30px rgba(0,0,0,0.08);
            border: 1px solid rgba(255,255,255,0.3);
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }
        .logo i { color: var(--primary); font-size: 24px; }
        .logo span { color: var(--primary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-list a:hover {
            background: rgba(255,107,0,0.08);
            color: var(--primary);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .nav-list a.active:hover {
            background: var(--primary-dark);
        }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            font-weight: 600 !important;
            padding: 8px 24px !important;
            margin-left: 8px;
            box-shadow: 0 2px 12px rgba(255,107,0,0.3);
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(255,107,0,0.4) !important;
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px 4px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

        /* 移动菜单面板 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(30,30,30,0.97);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 20px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.4s ease;
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu a {
            color: #fff;
            font-size: 24px;
            font-weight: 500;
            padding: 12px 32px;
            border-radius: var(--radius-full);
            transition: var(--transition);
        }
        .mobile-menu a:hover { background: rgba(255,255,255,0.1); }
        .mobile-menu a.active { color: var(--secondary); }
        .mobile-menu .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            margin-top: 16px;
        }
        .mobile-close {
            position: absolute;
            top: 28px;
            right: 28px;
            color: #fff;
            font-size: 36px;
            cursor: pointer;
            background: none;
            border: none;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #1E1E1E 0%, #2D2D2D 100%);
            overflow: hidden;
            padding-top: calc(var(--nav-height) + 40px);
            padding-bottom: 40px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% { transform: scale(1.05); }
            100% { transform: scale(1.15); }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,30,30,0.85) 0%, rgba(30,30,30,0.4) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 0 20px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255,107,0,0.2);
            color: var(--primary-light);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 20px;
            border-radius: var(--radius-full);
            border: 1px solid rgba(255,107,0,0.3);
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero h1 span { color: var(--primary); }
        .hero p {
            font-size: 19px;
            color: var(--text-light-muted);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn { font-size: 17px; padding: 14px 36px; }

        /* 装饰性运动线 */
        .hero::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            z-index: 3;
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(255,107,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .card h3 { font-size: 20px; margin-bottom: 10px; }
        .card p { color: var(--text-muted); font-size: 15px; line-height: 1.6; margin-bottom: 0; }

        /* ===== 赛事类型卡片（特色板块） ===== */
        .race-types {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--gap);
        }
        .race-type-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .race-type-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }
        .race-type-card .card-img {
            height: 180px;
            background: var(--bg-dark-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .race-type-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .race-type-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .race-type-card .card-body h3 { font-size: 19px; margin-bottom: 8px; }
        .race-type-card .card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; flex: 1; margin-bottom: 12px; }
        .race-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: var(--radius-full);
            background: rgba(255,107,0,0.1);
            color: var(--primary);
            margin-right: 6px;
            margin-bottom: 4px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--gap);
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(255,107,0,0.3);
        }
        .step-card h4 { font-size: 18px; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 0; }

        /* ===== 数据成果 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: var(--gap);
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .stat-num {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 16px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== 证言 ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--gap);
        }
        .testimonial-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .testimonial-card .quote {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 18px;
            font-style: italic;
            position: relative;
            padding-left: 20px;
            border-left: 3px solid var(--primary);
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .testimonial-card .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-dark-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
        }
        .testimonial-card .name {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
        }
        .testimonial-card .role {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-family: var(--font-sans);
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: transform 0.3s ease; font-size: 18px; color: var(--primary); }
        .faq-item.open .faq-question i { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #2A2A2A 100%);
            padding: 70px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(255,107,0,0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: 34px;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
        }
        .cta-block p {
            font-size: 17px;
            color: var(--text-light-muted);
            max-width: 560px;
            margin: 0 auto 30px;
            position: relative;
        }
        .cta-block .btn {
            position: relative;
            font-size: 18px;
            padding: 16px 48px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-light-muted);
            padding: 50px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--gap-lg);
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 20px;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-light-muted);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-light-muted);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .contact-item {
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            color: var(--text-light-muted);
        }
        .contact-item i { width: 18px; color: var(--primary); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-light-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .hero h1 { font-size: 38px; }
        }
        @media (max-width: 768px) {
            .site-header .container { padding: 0 16px; }
            .nav-list { display: none; }
            .hamburger { display: flex; }
            .mobile-menu { display: flex; }
            .hero h1 { font-size: 32px; }
            .hero p { font-size: 16px; }
            .section-title { font-size: 26px; }
            .section-sub { font-size: 15px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .race-types { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .testimonials-grid { grid-template-columns: 1fr; }
            .cta-block h2 { font-size: 26px; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 26px; }
            .hero p { font-size: 14px; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .section { padding: 40px 0; }
            .section-title { font-size: 22px; }
            .btn-lg { padding: 14px 32px; font-size: 16px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .site-header .container { height: 60px; }
            .faq-question { font-size: 14px; padding: 14px 18px; }
            .faq-answer { font-size: 13px; }
        }

        /* ===== 辅助 ===== */
        .bg-white { background: #fff; }
        .bg-light-alt { background: #FAFAFA; }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .gap-sm { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .text-primary { color: var(--primary); }

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

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B00;
            --primary-hover: #e05e00;
            --primary-light: rgba(255, 107, 0, 0.12);
            --accent: #FFD600;
            --accent-hover: #e6c200;
            --bg-dark: #1A1A1A;
            --bg-darker: #111111;
            --bg-light: #F5F5F5;
            --bg-white: #FFFFFF;
            --text-primary: #1E1E1E;
            --text-secondary: #555555;
            --text-light: #888888;
            --text-white: #FFFFFF;
            --border-color: #E8E8E8;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.14);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --radius-full: 50px;
            --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --section-padding: 80px 0;
        }

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

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

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 0;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .logo span { color: var(--primary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.6);
            padding: 6px 12px;
            border-radius: var(--radius-full);
            backdrop-filter: blur(4px);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-list a.active { color: var(--text-white); background: var(--primary); font-weight: 600; }
        .nav-cta {
            background: var(--primary) !important;
            color: var(--text-white) !important;
            font-weight: 600 !important;
            padding: 10px 24px !important;
            box-shadow: 0 4px 16px rgba(255, 107, 0, 0.30);
        }
        .nav-cta:hover { background: var(--primary-hover) !important; transform: translateY(-1px); box-shadow: 0 6px 24px rgba(255, 107, 0, 0.40) !important; }
        .hamburger { display: none; font-size: 28px; color: var(--text-primary); padding: 8px; cursor: pointer; }

        /* ===== Hero Banner ===== */
        .article-hero {
            padding-top: calc(var(--nav-height) + 40px);
            padding-bottom: 60px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.25;
            filter: brightness(0.5);
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,26,0.88) 0%, rgba(26,26,26,0.60) 100%);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-hero h1 {
            color: var(--text-white);
            font-size: 36px;
            font-weight: 900;
            max-width: 900px;
            margin: 0 auto 16px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            color: rgba(255,255,255,0.75);
            font-size: 14px;
            margin-top: 12px;
        }
        .article-meta i { margin-right: 6px; color: var(--accent); }
        .article-meta .category-tag {
            background: var(--primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
        }
        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            color: rgba(255,255,255,0.5);
            font-size: 14px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: rgba(255,255,255,0.3); }

        /* ===== Article Content ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg-light);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 48px;
            box-shadow: var(--shadow-sm);
        }
        .article-body h2 {
            font-size: 26px;
            margin: 40px 0 16px;
            color: var(--text-primary);
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-body h3 {
            font-size: 22px;
            margin: 32px 0 12px;
            color: var(--text-primary);
        }
        .article-body p {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .article-body p:first-child { margin-top: 0; }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 20px 24px;
            color: var(--text-secondary);
            font-size: 17px;
            line-height: 1.8;
        }
        .article-body ul li { list-style: disc; }
        .article-body ol li { list-style: decimal; }
        .article-body a { color: var(--primary); border-bottom: 1px solid transparent; }
        .article-body a:hover { border-bottom-color: var(--primary); }
        .article-body .post-empty {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-light);
        }
        .article-body .post-empty i { font-size: 48px; margin-bottom: 16px; color: var(--border-color); }
        .article-body .post-empty a { color: var(--primary); border-bottom: 1px solid var(--primary); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .related-list { display: flex; flex-direction: column; gap: 12px; }
        .related-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-item:last-child { border-bottom: none; }
        .related-item img {
            width: 70px;
            height: 70px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .related-item .info { flex: 1; }
        .related-item .info a {
            font-weight: 500;
            font-size: 15px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .related-item .info a:hover { color: var(--primary); }
        .related-item .info .date {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 4px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .btn-back:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            color: rgba(255,255,255,0.8);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: var(--text-white); font-size: 20px; margin-bottom: 16px; }
        .footer-brand p { font-size: 15px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .contact-item { font-size: 14px; margin-bottom: 8px; color: rgba(255,255,255,0.6); }
        .contact-item i { width: 20px; color: var(--accent); margin-right: 6px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --section-padding: 48px 0; }
            .nav-list { display: none; }
            .hamburger { display: block; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                padding: 24px;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                box-shadow: var(--shadow-lg);
                gap: 8px;
                z-index: 999;
            }
            .nav-list.open a { width: 100%; text-align: center; padding: 14px 20px; font-size: 16px; }
            .nav-list.open .nav-cta { margin-top: 8px; }
            .article-hero h1 { font-size: 26px; }
            .article-body { padding: 24px 20px; }
            .article-body h2 { font-size: 22px; }
            .article-body p { font-size: 16px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .article-meta { flex-direction: column; align-items: center; gap: 8px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-brand p { max-width: 100%; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero h1 { font-size: 22px; }
            .article-body { padding: 16px; }
            .article-body h2 { font-size: 19px; }
            .breadcrumb { font-size: 13px; }
            .related-item img { width: 56px; height: 56px; }
            .sidebar-card { padding: 20px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 22px; }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-hero .container { animation: fadeUp 0.6s ease-out; }
        .article-body { animation: fadeUp 0.4s ease-out; }
        .sidebar-card { animation: fadeUp 0.5s ease-out; }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #E53935;
            --primary-dark: #C62828;
            --primary-light: #FFEBEE;
            --accent: #FF6B00;
            --accent-light: #FFF3E0;
            --highlight: #FFD600;
            --bg-light: #F5F5F5;
            --bg-white: #FFFFFF;
            --bg-dark: #1E1E1E;
            --bg-dark-2: #2C2C2C;
            --text-dark: #1E1E1E;
            --text-body: #333333;
            --text-light: #666666;
            --text-white: #F5F5F5;
            --text-muted: #999999;
            --border: #E0E0E0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 50px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);
            --shadow-hover: 0 12px 40px rgba(229, 57, 53, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            padding-top: var(--header-height);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--text-dark);
            font-weight: 700;
        }

        h1 {
            font-size: clamp(32px, 5vw, 48px);
        }
        h2 {
            font-size: clamp(26px, 3.5vw, 34px);
        }
        h3 {
            font-size: clamp(20px, 2.5vw, 24px);
        }
        h4 {
            font-size: clamp(18px, 2vw, 20px);
        }

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

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .logo span {
            color: var(--primary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.6);
            padding: 4px 6px;
            border-radius: var(--radius-xl);
            backdrop-filter: blur(4px);
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-xl);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-list a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(229, 57, 53, 0.3);
        }
        .nav-list a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .nav-list a.nav-cta {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            padding: 8px 24px;
            box-shadow: 0 4px 14px rgba(255, 107, 0, 0.3);
        }
        .nav-list a.nav-cta:hover {
            background: #E65100;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 0, 0.4);
        }

        /* Mobile hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 3px;
            transition: var(--transition);
        }
        .hamburger:hover span {
            background: var(--primary);
        }

        /* Mobile nav */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.open {
            opacity: 1;
        }
        .mobile-nav {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--bg-white);
            padding: 20px 24px 32px;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            box-shadow: var(--shadow-lg);
            transform: translateY(-110%);
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 1000;
        }
        .mobile-nav.open {
            transform: translateY(0);
        }
        .mobile-nav a {
            display: block;
            padding: 14px 0;
            font-size: 18px;
            font-weight: 500;
            color: var(--text-body);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a:hover {
            color: var(--primary);
            padding-left: 8px;
        }
        .mobile-nav a.active {
            color: var(--primary);
            font-weight: 700;
        }
        .mobile-nav a.nav-cta {
            background: var(--accent);
            color: #fff;
            text-align: center;
            padding: 14px;
            border-radius: var(--radius-xl);
            margin-top: 12px;
            font-weight: 600;
        }
        .mobile-nav a.nav-cta:hover {
            background: #E65100;
            padding-left: 14px;
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav-overlay {
                display: block;
                pointer-events: none;
            }
            .mobile-nav-overlay.open {
                pointer-events: auto;
            }
            .mobile-nav {
                display: block;
            }
        }

        @media (min-width: 769px) {
            .mobile-nav,
            .mobile-nav-overlay {
                display: none !important;
            }
        }

        /* ===== Hero Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(30, 30, 30, 0.92), rgba(30, 30, 30, 0.7)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            text-align: center;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-light), transparent);
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 107, 0, 0.2);
            color: var(--accent);
            padding: 6px 20px;
            border-radius: var(--radius-xl);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 107, 0, 0.25);
        }
        .page-hero h1 {
            color: #fff;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero h1 span {
            color: var(--highlight);
        }
        .page-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .page-hero .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .page-hero .hero-actions .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-xl);
            font-size: 17px;
            font-weight: 600;
            box-shadow: 0 6px 24px rgba(229, 57, 53, 0.4);
            transition: var(--transition);
        }
        .page-hero .hero-actions .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(229, 57, 53, 0.5);
        }
        .page-hero .hero-actions .btn-secondary {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-xl);
            font-size: 17px;
            font-weight: 500;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .page-hero .hero-actions .btn-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 56px 0 48px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .page-hero .hero-actions .btn-primary,
            .page-hero .hero-actions .btn-secondary {
                padding: 12px 28px;
                font-size: 15px;
                width: 100%;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header .subtitle {
            color: var(--text-light);
            font-size: 17px;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: var(--radius-xl);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid.col-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.col-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(229, 57, 53, 0.1);
        }
        .card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--border);
        }
        .card .card-body {
            padding: 22px 24px 26px;
        }
        .card .card-body h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }
        .card .card-body .card-desc {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card .card-body .card-meta .tag {
            background: var(--accent-light);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: var(--radius-xl);
            font-weight: 500;
            font-size: 12px;
        }
        .card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            margin-top: 6px;
            transition: var(--transition);
        }
        .card .card-body .card-link:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.col-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid.col-2,
            .card-grid.col-4 {
                grid-template-columns: 1fr;
            }
            .card .card-img {
                height: 180px;
            }
        }

        /* ===== Feature / Benefit Row ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-row.reverse {
            direction: rtl;
        }
        .feature-row.reverse>* {
            direction: ltr;
        }
        .feature-row .feature-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--border);
            min-height: 320px;
            object-fit: cover;
            width: 100%;
        }
        .feature-row .feature-content h3 {
            margin-bottom: 12px;
        }
        .feature-row .feature-content p {
            color: var(--text-light);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .feature-row .feature-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature-row .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-body);
        }
        .feature-row .feature-content .feature-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .feature-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .feature-row.reverse {
                direction: ltr;
            }
            .feature-row .feature-img {
                min-height: 220px;
            }
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-white);
            padding: 32px 16px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-item .stat-number {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-number .plus {
            font-size: 28px;
            color: var(--accent);
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-light);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-item .stat-number {
                font-size: 30px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-question .faq-icon {
            font-size: 20px;
            transition: var(--transition);
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 640px) {
            .faq-item .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-item .faq-answer {
                font-size: 14px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(30, 30, 30, 0.92), rgba(30, 30, 30, 0.7)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            padding: 72px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(229, 57, 53, 0.2), transparent 70%);
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: clamp(28px, 4vw, 40px);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 18px;
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-cta {
            display: inline-block;
            background: var(--highlight);
            color: var(--text-dark);
            padding: 16px 44px;
            border-radius: var(--radius-xl);
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 8px 28px rgba(255, 214, 0, 0.35);
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-4px) scale(1.02);
            box-shadow: 0 12px 40px rgba(255, 214, 0, 0.5);
            background: #FFC107;
            color: var(--text-dark);
        }
        .cta-section .btn-cta i {
            margin-left: 8px;
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section .btn-cta {
                padding: 14px 32px;
                font-size: 16px;
                width: 100%;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 22px;
            margin-bottom: 14px;
        }
        .footer-brand .logo i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--highlight);
            padding-left: 4px;
        }
        .footer-col .contact-item {
            font-size: 14px;
            padding: 5px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-col .contact-item i {
            width: 18px;
            color: var(--primary);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--highlight);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1;
            }
        }

        /* ===== Process / Steps ===== */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 20px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .step-card:hover .step-number {
            background: var(--primary);
            color: #fff;
        }
        .step-card h4 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 900px) {
            .steps-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-row {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scene Cards ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .scene-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .scene-card .scene-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--border);
        }
        .scene-card .scene-body {
            padding: 20px 22px 24px;
        }
        .scene-card .scene-body h4 {
            font-size: 18px;
            margin-bottom: 6px;
        }
        .scene-card .scene-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 900px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Dark Section ===== */
        .section-dark {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header .subtitle {
            color: rgba(255, 255, 255, 0.65);
        }
        .section-dark .section-header .section-tag {
            background: rgba(229, 57, 53, 0.2);
            color: #FF8A80;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-36 {
            margin-top: 36px;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }

        /* ===== Back to top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 500;
            border: none;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        @media (max-width: 520px) {
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 16px 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--text-body);
            font-weight: 500;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 480px) {
            body {
                font-size: 15px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .section-header .subtitle {
                font-size: 15px;
            }
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #FF6B00;
            --primary-dark: #E05E00;
            --primary-light: #FF8C33;
            --secondary: #1E1E1E;
            --accent: #FFD600;
            --bg-light: #F5F5F5;
            --bg-dark: #1A1A1A;
            --text-dark: #1E1E1E;
            --text-light: #FAFAFA;
            --text-muted: #888888;
            --border-color: #E0E0E0;
            --card-radius: 12px;
            --btn-radius: 24px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.15);
            --transition: 0.3s ease;
            --font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-width: 1200px;
            --nav-height: 70px;
        }

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

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 50px;
            padding: 8px 28px;
            box-shadow: 0 4px 24px rgba(0,0,0,0.10);
            pointer-events: auto;
            width: 100%;
            max-width: 1100px;
            border: 1px solid rgba(255,255,255,0.30);
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i { color: var(--primary); font-size: 26px; }
        .logo span { color: var(--primary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            position: relative;
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-list a:hover { background: rgba(255,107,0,0.10); color: var(--primary); }
        .nav-list a.active { background: var(--primary); color: #fff; font-weight: 600; }
        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 24px;
            font-weight: 600;
            border-radius: 24px;
        }
        .nav-list a.nav-cta:hover { background: var(--primary-dark); color: #fff; }
        .menu-toggle { display: none; font-size: 26px; color: var(--secondary); cursor: pointer; padding: 4px; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 140px 24px 100px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,30,30,0.75) 0%, rgba(30,30,30,0.40) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero h1 {
            font-size: 48px;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.30);
        }
        .hero h1 span { color: var(--primary-light); }
        .hero-sub {
            font-size: 20px;
            color: rgba(255,255,255,0.85);
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--primary);
            color: #fff;
            font-size: 17px;
            font-weight: 600;
            border-radius: var(--btn-radius);
            transition: background var(--transition), transform 0.2s, box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(255,107,0,0.35);
        }
        .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255,107,0,0.40); }
        .btn-primary:active { transform: scale(0.97); }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: #fff;
            font-size: 17px;
            font-weight: 600;
            border-radius: var(--btn-radius);
            border: 2px solid rgba(255,255,255,0.60);
            transition: background var(--transition), border-color var(--transition), transform 0.2s;
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; transform: translateY(-2px); }
        .btn-secondary:active { transform: scale(0.97); }

        /* ===== Section Shared ===== */
        .section { padding: 80px 0; }
        .section-alt { background: #fff; }
        .section-dark { background: var(--bg-dark); color: var(--text-light); }
        .section-dark h2, .section-dark h3 { color: #fff; }
        .section-title {
            text-align: center;
            font-size: 34px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-sub {
            text-align: center;
            font-size: 18px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-dark .section-sub { color: rgba(255,255,255,0.65); }

        /* ===== Philosophy (左图右文) ===== */
        .philosophy-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }
        .philosophy-image {
            flex: 1 1 440px;
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: #E8E8E8;
            min-height: 300px;
        }
        .philosophy-image img { width: 100%; height: 100%; object-fit: cover; }
        .philosophy-text {
            flex: 1 1 380px;
        }
        .philosophy-text h3 { font-size: 30px; margin-bottom: 20px; }
        .philosophy-text p { font-size: 17px; color: #555; line-height: 1.8; margin-bottom: 16px; }
        .philosophy-text .tag {
            display: inline-block;
            background: rgba(255,107,0,0.10);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 12px;
        }

        /* ===== Course Cards ===== */
        .course-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .course-card {
            background: #fff;
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid var(--border-color);
        }
        .course-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
        .course-card .card-img {
            width: 100%;
            height: 200px;
            background: #E0E0E0;
            overflow: hidden;
        }
        .course-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
        .course-card:hover .card-img img { transform: scale(1.05); }
        .course-card .card-body { padding: 28px 24px; }
        .course-card .card-body h4 { font-size: 20px; margin-bottom: 10px; }
        .course-card .card-body p { font-size: 15px; color: #666; line-height: 1.7; }
        .course-card .card-tag {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 12px;
        }

        /* ===== Coach Team ===== */
        .coach-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .coach-card {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .coach-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .coach-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(255,107,0,0.25);
        }
        .coach-card h4 { font-size: 18px; margin-bottom: 4px; }
        .coach-card .coach-title { font-size: 14px; color: var(--primary); font-weight: 500; margin-bottom: 12px; }
        .coach-card p { font-size: 14px; color: #777; line-height: 1.6; }

        /* ===== Environment ===== */
        .env-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .env-item {
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: #fff;
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition);
        }
        .env-item:hover { box-shadow: var(--shadow-md); }
        .env-item img { width: 100%; height: 220px; object-fit: cover; background: #E0E0E0; }
        .env-item .env-info { padding: 20px 24px; }
        .env-item .env-info h4 { font-size: 18px; margin-bottom: 6px; }
        .env-item .env-info p { font-size: 14px; color: #777; }

        /* ===== Process Steps ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: rgba(255,255,255,0.06);
            border-radius: var(--card-radius);
            padding: 32px 20px 28px;
            text-align: center;
            border: 1px solid rgba(255,255,255,0.10);
            transition: background var(--transition), transform var(--transition);
            position: relative;
        }
        .step-card:hover { background: rgba(255,255,255,0.12); transform: translateY(-4px); }
        .step-card::before {
            counter-increment: step;
            content: "0" counter(step);
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            opacity: 0.7;
        }
        .step-card .step-icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .step-card h4 { font-size: 18px; color: #fff; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.6; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 18px 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 17px;
            font-weight: 600;
            color: var(--secondary);
            cursor: pointer;
            padding: 4px 0;
            transition: color var(--transition);
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { font-size: 18px; transition: transform 0.3s; color: var(--primary); }
        .faq-question.open i { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s;
            color: #555;
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-answer.open { max-height: 400px; padding-top: 12px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 { color: #fff; font-size: 34px; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 18px; margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            background: #fff;
            color: var(--primary);
            font-size: 18px;
            font-weight: 700;
            border-radius: var(--btn-radius);
            transition: background var(--transition), transform 0.2s, box-shadow var(--transition);
            box-shadow: 0 4px 20px rgba(0,0,0,0.20);
        }
        .btn-cta:hover { background: var(--accent); color: var(--secondary); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.25); }
        .btn-cta:active { transform: scale(0.97); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 14px; font-size: 20px; }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.60); max-width: 320px; }
        .footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 16px; font-weight: 600; }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255,255,255,0.60);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--primary); }
        .footer-col .contact-item {
            font-size: 14px;
            color: rgba(255,255,255,0.60);
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-col .contact-item i { color: var(--primary); width: 18px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom a { color: rgba(255,255,255,0.55); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .course-grid { grid-template-columns: repeat(2, 1fr); }
            .coach-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .site-header { top: 12px; }
            .site-header .container { padding: 6px 18px; border-radius: 40px; }
            .logo { font-size: 18px; }
            .logo i { font-size: 20px; }
            .nav-list { display: none; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: calc(100% + 12px);
                left: 12px;
                right: 12px;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                border-radius: 24px;
                padding: 16px;
                box-shadow: var(--shadow-lg);
                gap: 4px;
                border: 1px solid rgba(0,0,0,0.06);
            }
            .nav-list.open a { padding: 12px 20px; width: 100%; text-align: center; }
            .nav-list.open a.nav-cta { margin-top: 6px; }
            .menu-toggle { display: block; }
            .hero h1 { font-size: 32px; }
            .hero-sub { font-size: 17px; }
            .section-title { font-size: 28px; }
            .section-sub { font-size: 16px; }
            .philosophy-grid { flex-direction: column; gap: 32px; }
            .philosophy-image { flex: 1 1 auto; min-height: 220px; width: 100%; }
            .philosophy-text { flex: 1 1 auto; }
            .course-grid { grid-template-columns: 1fr; }
            .coach-grid { grid-template-columns: 1fr; }
            .env-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; text-align: center; }
            .footer-brand p { max-width: 100%; }
            .footer-col .contact-item { justify-content: center; }
            .section { padding: 56px 0; }
            .cta-section { padding: 60px 24px; }
            .cta-section h2 { font-size: 28px; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 26px; }
            .hero-sub { font-size: 15px; }
            .hero { padding: 120px 16px 80px; }
            .hero-btns { flex-direction: column; align-items: center; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
            .section-title { font-size: 24px; }
            .logo { font-size: 16px; }
            .logo i { font-size: 18px; }
            .site-header .container { padding: 4px 14px; }
            .step-card { padding: 24px 16px; }
        }

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

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-24 { margin-top: 24px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .w-full { width: 100%; }

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