/* roulang page: index */
:root {
            --color-primary: #00d4ff;
            --color-primary-rgb: 0, 212, 255;
            --color-secondary: #b347ea;
            --color-secondary-rgb: 179, 71, 234;
            --color-bg: #0a0e17;
            --color-card: #111827;
            --color-surface: #1a1f2e;
            --color-text: #e2e8f0;
            --color-muted: #94a3b8;
            --color-border: #1e293b;
            --color-border-light: #334155;
            --radius-sm: 0.5rem;
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 12px rgba(var(--color-primary-rgb), 0.25), 0 0 32px rgba(var(--color-primary-rgb), 0.08);
            --shadow-glow-strong: 0 0 20px rgba(var(--color-primary-rgb), 0.45), 0 0 48px rgba(var(--color-primary-rgb), 0.15);
            --shadow-purple-glow: 0 0 12px rgba(var(--color-secondary-rgb), 0.25), 0 0 32px rgba(var(--color-secondary-rgb), 0.08);
            --transition-fast: 0.18s ease;
            --transition: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            font-size: inherit;
            color: inherit;
        }
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            border: none;
            outline: none;
        }
        input:focus,
        textarea:focus,
        button:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: #f1f5f9;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 14, 23, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(30, 41, 59, 0.55);
            transition: background var(--transition), border-color var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.94);
            border-bottom-color: rgba(0, 212, 255, 0.2);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 1.5rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.35rem;
            color: #f1f5f9;
            white-space: nowrap;
            flex-shrink: 0;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
            transition: box-shadow var(--transition);
        }
        .logo:hover .logo-icon {
            box-shadow: var(--shadow-glow-strong);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #f1f5f9;
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(var(--color-primary-rgb), 0.08);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1.3rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff !important;
            transition: all var(--transition);
            box-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.3);
            white-space: nowrap;
        }
        .nav-cta:hover {
            box-shadow: 0 0 22px rgba(var(--color-primary-rgb), 0.55), 0 0 40px rgba(var(--color-secondary-rgb), 0.25);
            transform: translateY(-1px);
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 2rem;
            padding: 0.4rem 0.9rem;
            transition: all var(--transition-fast);
            font-size: 0.9rem;
            color: var(--color-muted);
            cursor: pointer;
        }
        .nav-search input {
            background: transparent;
            width: 100px;
            font-size: 0.85rem;
            color: var(--color-text);
            transition: width var(--transition);
        }
        .nav-search input:focus {
            width: 150px;
        }
        .nav-search:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.08);
        }
        .nav-search i {
            font-size: 0.85rem;
            color: var(--color-muted);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 14, 23, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            padding: 2rem 1.5rem;
            gap: 0.5rem;
            overflow-y: auto;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            display: block;
            padding: 0.9rem 1.2rem;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--color-muted);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #f1f5f9;
            background: rgba(255, 255, 255, 0.03);
            border-color: var(--color-border);
        }
        .mobile-menu .mobile-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff !important;
            text-align: center;
            font-weight: 600;
            border: none;
            margin-top: 0.5rem;
            box-shadow: var(--shadow-glow);
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            overflow: hidden;
            background: var(--color-bg);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            filter: brightness(0.6) saturate(1.2);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: radial-gradient(ellipse at 55% 40%, rgba(0, 212, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 30% 60%, rgba(179, 71, 234, 0.06) 0%, transparent 55%),
                linear-gradient(180deg, rgba(10, 14, 23, 0.5) 0%, rgba(10, 14, 23, 0.85) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 3rem 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(var(--color-primary-rgb), 0.1);
            border: 1px solid rgba(var(--color-primary-rgb), 0.3);
            border-radius: 2rem;
            padding: 0.4rem 1rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-primary);
            margin-bottom: 1.5rem;
            animation: pulse-badge 2.5s ease-in-out infinite;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(var(--color-primary-rgb), 0.25);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(var(--color-primary-rgb), 0);
            }
        }
        .hero-badge i {
            font-size: 0.7rem;
            animation: blink-dot 1.5s ease-in-out infinite;
        }
        @keyframes blink-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1.2rem;
            line-height: 1.15;
            color: #f8fafc;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--color-primary), #6ee7ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--color-muted);
            margin-bottom: 2rem;
            max-width: 560px;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.8rem;
            border-radius: 2.5rem;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), #0098b8);
            color: #fff;
            box-shadow: 0 0 16px rgba(var(--color-primary-rgb), 0.3);
            border: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 28px rgba(var(--color-primary-rgb), 0.55), 0 0 50px rgba(var(--color-primary-rgb), 0.2);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--color-border-light);
            color: #f1f5f9;
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            box-shadow: 0 0 14px rgba(var(--color-primary-rgb), 0.15);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            border-radius: 2rem;
        }

        /* Sections */
        .section {
            padding: 5rem 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-primary);
            margin-bottom: 0.6rem;
        }
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
            color: #f8fafc;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-muted);
            max-width: 600px;
            margin-bottom: 2.5rem;
            line-height: 1.65;
        }
        .section-dark {
            background: var(--color-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            opacity: 0;
            transition: opacity var(--transition);
            border-radius: 0 0 2px 2px;
        }
        .card:hover {
            border-color: rgba(var(--color-primary-rgb), 0.35);
            box-shadow: var(--shadow-lg), 0 0 20px rgba(var(--color-primary-rgb), 0.06);
            transform: translateY(-3px);
        }
        .card:hover::before {
            opacity: 1;
        }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            flex-shrink: 0;
            transition: all var(--transition);
        }
        .card-icon.blue {
            background: rgba(var(--color-primary-rgb), 0.12);
            color: var(--color-primary);
        }
        .card-icon.purple {
            background: rgba(var(--color-secondary-rgb), 0.12);
            color: var(--color-secondary);
        }
        .card-icon.green {
            background: rgba(34, 197, 94, 0.12);
            color: #22c55e;
        }
        .card-icon.amber {
            background: rgba(251, 191, 36, 0.12);
            color: #fbbf24;
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
            color: #f1f5f9;
        }
        .card p {
            font-size: 0.9rem;
            color: var(--color-muted);
            line-height: 1.6;
        }
        .card-badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.25rem 0.7rem;
            border-radius: 1rem;
            margin-bottom: 0.8rem;
            letter-spacing: 0.04em;
        }
        .badge-hot {
            background: rgba(239, 68, 68, 0.15);
            color: #ef4444;
        }
        .badge-new {
            background: rgba(var(--color-primary-rgb), 0.15);
            color: var(--color-primary);
        }
        .badge-top {
            background: rgba(251, 191, 36, 0.15);
            color: #fbbf24;
        }

        /* Image cards */
        .img-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            position: relative;
        }
        .img-card:hover {
            border-color: rgba(var(--color-primary-rgb), 0.35);
            box-shadow: var(--shadow-lg), 0 0 20px rgba(var(--color-primary-rgb), 0.06);
            transform: translateY(-3px);
        }
        .img-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .img-card:hover img {
            transform: scale(1.04);
        }
        .img-card-body {
            padding: 1.3rem 1.5rem;
        }
        .img-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
            color: #f1f5f9;
        }
        .img-card-body p {
            font-size: 0.85rem;
            color: var(--color-muted);
            line-height: 1.55;
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem;
            text-align: center;
        }
        .stat-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 2rem 1.2rem;
            transition: all var(--transition);
            position: relative;
        }
        .stat-card:hover {
            border-color: rgba(var(--color-primary-rgb), 0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--color-primary), #6ee7ff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 0.3rem;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--color-muted);
            font-weight: 500;
        }

        /* Bracket Flow */
        .bracket-flow {
            display: flex;
            align-items: stretch;
            gap: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding: 1rem 0;
            scroll-snap-type: x proximity;
            -webkit-overflow-scrolling: touch;
        }
        .bracket-step {
            flex: 1 0 200px;
            min-width: 180px;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
            scroll-snap-align: start;
        }
        .bracket-step:not(:last-child)::after {
            content: '';
            position: absolute;
            right: -20px;
            top: 38px;
            width: 40px;
            height: 2px;
            background: linear-gradient(90deg, var(--color-border-light), var(--color-primary));
            z-index: 0;
        }
        .bracket-node {
            width: 76px;
            height: 76px;
            border-radius: 50%;
            background: var(--color-surface);
            border: 3px solid var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 1rem;
            position: relative;
            z-index: 1;
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .bracket-step:hover .bracket-node {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-glow-strong);
            transform: scale(1.06);
        }
        .bracket-step h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #f1f5f9;
            margin-bottom: 0.3rem;
        }
        .bracket-step p {
            font-size: 0.8rem;
            color: var(--color-muted);
            max-width: 160px;
            line-height: 1.5;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: rgba(var(--color-primary-rgb), 0.25);
        }
        .faq-item summary {
            padding: 1.1rem 1.4rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: #f1f5f9;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            user-select: none;
            transition: color var(--transition-fast);
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--color-primary);
        }
        .faq-arrow {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            transition: all var(--transition-fast);
            color: var(--color-muted);
        }
        .faq-item[open] .faq-arrow {
            transform: rotate(180deg);
            background: rgba(var(--color-primary-rgb), 0.15);
            color: var(--color-primary);
        }
        .faq-item .faq-answer {
            padding: 0 1.4rem 1.2rem;
            font-size: 0.9rem;
            color: var(--color-muted);
            line-height: 1.65;
        }

        /* CTA Section */
        .cta-section {
            position: relative;
            overflow: hidden;
            background: var(--color-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            filter: brightness(0.5) saturate(1.3);
        }
        .cta-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.06) 0%, transparent 70%),
                linear-gradient(180deg, rgba(17, 24, 39, 0.7) 0%, rgba(17, 24, 39, 0.9) 100%);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 0.8rem;
            color: #f8fafc;
        }
        .cta-content p {
            color: var(--color-muted);
            margin-bottom: 1.8rem;
            font-size: 1rem;
            line-height: 1.6;
        }
        .cta-form {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
            justify-content: center;
            max-width: 480px;
            margin: 0 auto;
        }
        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 0.75rem 1.2rem;
            border-radius: 2.5rem;
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            color: var(--color-text);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }
        .cta-form input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(var(--color-primary-rgb), 0.06);
        }
        .cta-form button {
            padding: 0.75rem 1.8rem;
            border-radius: 2.5rem;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            box-shadow: 0 0 14px rgba(var(--color-primary-rgb), 0.3);
            white-space: nowrap;
        }
        .cta-form button:hover {
            box-shadow: 0 0 24px rgba(var(--color-primary-rgb), 0.5), 0 0 40px rgba(var(--color-secondary-rgb), 0.2);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding: 3rem 0 2rem;
            color: var(--color-muted);
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #f1f5f9;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            color: var(--color-muted);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-size: 0.8rem;
        }
        .footer-bottom .social-links {
            display: flex;
            gap: 0.8rem;
        }
        .footer-bottom .social-links a {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--color-surface);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--color-muted);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .footer-bottom .social-links a:hover {
            color: var(--color-primary);
            border-color: rgba(var(--color-primary-rgb), 0.3);
            background: rgba(var(--color-primary-rgb), 0.06);
            box-shadow: 0 0 10px rgba(var(--color-primary-rgb), 0.12);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 0;
            }
            .nav-links a {
                padding: 0.45rem 0.7rem;
                font-size: 0.85rem;
            }
            .nav-search input {
                width: 70px;
            }
            .nav-search input:focus {
                width: 110px;
            }
            .bracket-flow {
                gap: 0.5rem;
            }
            .bracket-step {
                flex: 1 0 170px;
                min-width: 150px;
            }
            .bracket-step:not(:last-child)::after {
                right: -14px;
                width: 28px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .section {
                padding: 3.5rem 0;
            }
            .hero {
                min-height: auto;
                padding: 6rem 0 3rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .btn {
                padding: 0.65rem 1.4rem;
                font-size: 0.9rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .bracket-flow {
                flex-direction: column;
                align-items: center;
                gap: 1rem;
                overflow-x: visible;
            }
            .bracket-step {
                flex: 1 0 auto;
                min-width: auto;
                flex-direction: row;
                gap: 1rem;
                align-items: center;
                text-align: left;
                width: 100%;
                max-width: 320px;
            }
            .bracket-step:not(:last-child)::after {
                right: auto;
                top: auto;
                bottom: -16px;
                left: 38px;
                width: 2px;
                height: 32px;
                background: linear-gradient(180deg, var(--color-border-light), var(--color-primary));
            }
            .bracket-node {
                width: 56px;
                height: 56px;
                font-size: 1.2rem;
                margin-bottom: 0;
            }
            .bracket-step h4 {
                font-size: 0.9rem;
            }
            .bracket-step p {
                font-size: 0.75rem;
                max-width: none;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input {
                width: 100%;
                min-width: auto;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .img-card img {
                height: 160px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .hero-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .stat-card {
                padding: 1.2rem 0.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 1rem;
            }
            .card {
                padding: 1.3rem;
            }
            .img-card img {
                height: 140px;
            }
            .section-title {
                font-size: 1.35rem;
            }
        }