:root {
            --bg-dark: #0a0a0f;
            --bg-card: #14141f;
            --bg-card-hover: #1a1a2e;
            --purple-bg: #7c3aed;
            --purple-light: #a78bfa;
            --purple-glow: rgba(124, 58, 237, 0.45);
            --red-accent: #ef4444;
            --red-glow: rgba(239, 68, 68, 0.5);
            --yellow-accent: #f59e0b;
            --yellow-glow: rgba(245, 158, 11, 0.45);
            --white: #ffffff;
            --text-primary: #f1f1f8;
            --text-secondary: #b0b0c0;
            --text-muted: #7a7a92;
            --border-color: #2a2a40;
            --border-glow: #5a4a8c;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --nav-height: 64px;
            --max-width: 1200px;
            --transition-speed: 0.25s;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            padding-top: var(--nav-height);
        }

        /* ========== 顶部导航栏 ========== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 18, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 2px solid var(--border-color);
            box-shadow: 0 2px 20px rgba(124, 58, 237, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-speed) ease;
        }

        .navbar-inner {
            width: 100%;
            max-width: var(--max-width);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            gap: 16px;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .nav-logo-img {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, #7c3aed, #a78bfa);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 18px;
            letter-spacing: -1px;
            flex-shrink: 0;
            box-shadow: 0 0 14px var(--purple-glow);
        }

        .nav-brand-name {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--white);
            letter-spacing: -0.5px;
            white-space: nowrap;
            text-shadow: 0 0 8px rgba(124, 58, 237, 0.5);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 20px;
            transition: all var(--transition-speed) ease;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: #fff;
            background: rgba(124, 58, 237, 0.2);
            box-shadow: 0 0 12px var(--purple-glow);
        }

        .nav-download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            background: linear-gradient(135deg, #f59e0b 0%, #ef4444 50%, #e53935 100%);
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            border-radius: 24px;
            box-shadow: 0 4px 22px var(--red-glow);
            transition: all var(--transition-speed) ease;
            white-space: nowrap;
            animation: btn-pulse 2.2s ease-in-out infinite;
            flex-shrink: 0;
            border: 2px solid rgba(255, 255, 255, 0.2);
            letter-spacing: 0.5px;
        }

        .nav-download-btn:hover {
            box-shadow: 0 6px 30px rgba(239, 68, 68, 0.7);
            transform: translateY(-2px);
            animation: none;
            background: linear-gradient(135deg, #fbbf24 0%, #f87171 50%, #ef4444 100%);
        }

        @keyframes btn-pulse {
            0%, 100% { transform: scale(1); box-shadow: 0 4px 22px var(--red-glow); }
            50% { transform: scale(1.07); box-shadow: 0 8px 32px rgba(239, 68, 68, 0.7); }
        }

        .nav-menu-toggle {
            display: none;
            background: none;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 6px 12px;
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            cursor: pointer;
            white-space: nowrap;
        }

        /* ========== 主容器 ========== */
        .main-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ========== Hero 区域 ========== */
        .hero-section {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            padding: 48px 20px 40px;
            border-radius: 0 0 var(--radius-xl) var(--radius-xl);
            background: radial-gradient(circle at 20% 20%, rgba(124, 58, 237, 0.18) 0%, transparent 55%),
                        radial-gradient(circle at 80% 30%, rgba(245, 158, 11, 0.12) 0%, transparent 50%);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .hero-left {
            flex: 1 1 400px;
        }

        .hero-right {
            flex: 0 0 320px;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: 0 0 24px rgba(124, 58, 237, 0.3);
            backdrop-filter: blur(5px);
            min-width: 280px;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(124, 58, 237, 0.2);
            color: var(--purple-light);
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 20px;
            margin-bottom: 18px;
            border: 1px solid rgba(124, 58, 237, 0.4);
            letter-spacing: 0.5px;
        }

        .hero-left h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -1px;
            line-height: 1.25;
            text-shadow: 0 0 18px rgba(124, 58, 237, 0.6);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 24px;
            line-height: 1.8;
        }

        .hero-download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 40px;
            background: linear-gradient(135deg, #f59e0b 0%, #ef4444 45%, #dc2626 100%);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            text-decoration: none;
            border-radius: 30px;
            box-shadow: 0 6px 28px var(--red-glow);
            transition: all var(--transition-speed) ease;
            animation: hero-btn-pulse 2s ease-in-out infinite;
            border: 3px solid rgba(255, 255, 255, 0.2);
            letter-spacing: 1px;
            position: relative;
            overflow: hidden;
        }

        .hero-download-btn:hover {
            box-shadow: 0 10px 40px rgba(239, 68, 68, 0.8);
            transform: translateY(-3px) scale(1.04);
            animation: none;
            background: linear-gradient(135deg, #fbbf24 0%, #f87171 45%, #ef4444 100%);
        }

        @keyframes hero-btn-pulse {
            0%, 100% { transform: scale(1); box-shadow: 0 6px 28px var(--red-glow); }
            50% { transform: scale(1.06); box-shadow: 0 12px 42px rgba(239, 68, 68, 0.8); }
        }

        .hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            margin-top: 20px;
        }
        .hero-stat-number {
            font-size: 1.9rem;
            font-weight: 900;
            color: var(--purple-light);
            text-shadow: 0 0 10px rgba(124, 58, 237, 0.6);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 实时数据 */
        .live-data-title {
            font-weight: 800;
            font-size: 1rem;
            color: var(--yellow-accent);
            margin-bottom: 12px;
            text-shadow: 0 0 8px rgba(245,158,11,0.5);
            letter-spacing: 0.5px;
        }
        .live-data-row {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            font-size: 0.9rem;
        }
        .live-price-up { color: #4ade80; }
        .live-price-down { color: #f87171; }
        .live-pair { font-weight: 600; color: #ddd; }
        .live-volume { color: #aaa; font-size: 0.78rem; }

        /* ========== 通用区块 ========== */
        .section-block {
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            margin-bottom: 28px;
            box-shadow: 0 0 16px rgba(124, 58, 237, 0.15);
            transition: box-shadow var(--transition-speed) ease;
        }
        .section-block:hover {
            box-shadow: 0 0 28px rgba(124, 58, 237, 0.30);
            border-color: var(--border-glow);
        }

        .section-title {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 48px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, #f59e0b, #ef4444);
            box-shadow: 0 0 10px rgba(239,68,68,0.5);
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 22px;
            margin-top: 6px;
        }

        /* 功能卡片 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            transition: all var(--transition-speed) ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 4px;
            background: linear-gradient(90deg, #7c3aed, #a78bfa, #f59e0b);
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .feature-card:hover {
            box-shadow: 0 0 24px rgba(124,58,237,0.4);
            transform: translateY(-4px);
            border-color: #6d4dc4;
        }
        .feature-card h3 { color: #e9e0ff; margin-bottom: 8px; }
        .feature-card p { color: var(--text-secondary); font-size: 0.9rem; }
        .feature-tag { padding: 4px 12px; border-radius: 14px; font-size: 0.75rem; font-weight: 700; display: inline-block; margin-right: 6px; margin-top: 8px; }
        .tag-purple { background: rgba(124,58,237,0.25); color: #c4b5fd; }
        .tag-red { background: rgba(239,68,68,0.2); color: #fca5a5; }
        .tag-yellow { background: rgba(245,158,11,0.2); color: #fcd34d; }

        /* 步骤 */
        .steps-list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
        .steps-list li {
            display: flex; align-items: flex-start; gap: 14px;
            padding: 14px 16px;
            background: rgba(20,20,32,0.9);
            border-radius: var(--radius-sm);
            border-left: 4px solid var(--purple-bg);
        }
        .step-number {
            width: 34px; height: 34px; border-radius: 50%;
            background: linear-gradient(135deg, #7c3aed, #5b21b6);
            color: #fff; font-weight: 900; display: flex; align-items: center; justify-content: center;
            flex-shrink: 0;
        }
        .step-content strong { color: #ddd; display: block; }
        .step-content span { color: var(--text-secondary); font-size: 0.88rem; }

        /* FAQ */
        .faq-item {
            border: 2px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 8px;
            background: #0e0e1a;
        }
        .faq-question {
            width: 100%; background: transparent; border: none;
            padding: 16px 20px; text-align: left; font-weight: 700;
            color: #ddd; cursor: pointer; display: flex; justify-content: space-between;
        }
        .faq-arrow { transition: transform 0.3s; }
        .faq-item.open .faq-arrow { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s; padding: 0 20px; color: #aaa; }
        .faq-item.open .faq-answer { max-height: 300px; padding: 10px 20px 18px; }

        /* 评论区域 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 16px;
        }
        .review-card {
            background: #111122;
            border: 1px solid #2a2a42;
            border-radius: var(--radius-md);
            padding: 16px;
            color: #ccc;
        }
        .review-user {
            font-weight: 700; color: #d1c4ff; margin-bottom: 4px;
        }
        .review-date {
            font-size: 0.7rem; color: #666; margin-bottom: 8px;
        }
        .review-text {
            font-size: 0.88rem; line-height: 1.6;
        }

        /* 底部 */
        .footer-nav { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; padding: 24px; border-top: 1px solid #2a2a40; }
        .footer-nav a { color: #aaa; text-decoration: none; font-weight: 600; }
        .site-footer { text-align: center; padding: 18px; color: #666; font-size: 0.8rem; border-top: 1px solid #1f1f30; }

        .mobile-float-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: #0f0f1a; border-top: 2px solid #4a3a7c; padding: 10px; z-index: 999; }
        .mobile-float-btn { background: linear-gradient(135deg, #f59e0b, #ef4444); color: #fff; padding: 10px 20px; border-radius: 22px; text-decoration: none; font-weight: 700; animation: btn-pulse 2s infinite; }

        @media (max-width: 900px) {
            .hero-section { flex-direction: column; }
            .hero-right { width: 100%; }
            .nav-links { display: none; }
            .nav-menu-toggle { display: inline-block; }
            .mobile-float-bar { display: block; }
        }
        @media (min-width: 901px) {
            .mobile-float-bar { display: none; }
        }