:root {
            --bg-deep: #070a0e;
            --bg-surface: rgba(16, 20, 26, 0.78);
            --bg-elevated: rgba(22, 28, 36, 0.85);
            --bg-card: rgba(18, 23, 30, 0.72);
            --accent-gold: #e8a817;
            --accent-gold-light: #f5c54a;
            --accent-gold-glow: rgba(232, 168, 23, 0.28);
            --accent-gold-soft: rgba(232, 168, 23, 0.1);
            --accent-emerald: #10b981;
            --accent-emerald-glow: rgba(16, 185, 129, 0.22);
            --accent-copper: #c77d4b;
            --text-primary: #f0ede8;
            --text-secondary: #b8b5ad;
            --text-tertiary: #7a7670;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-warm: rgba(232, 168, 23, 0.18);
            --border-active: rgba(232, 168, 23, 0.45);
            --border-emerald: rgba(16, 185, 129, 0.28);
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-full: 9999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow-gold: 0 0 44px rgba(232, 168, 23, 0.2);
            --shadow-glow-emerald: 0 0 38px rgba(16, 185, 129, 0.15);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            color: var(--text-primary);
            background-color: var(--bg-deep);
            line-height: 1.7;
            overflow-x: hidden;
            letter-spacing: 0.01em;
            min-height: 100vh;
        }

        .ambient-glow-layer { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; overflow: hidden; }
        .ambient-orb { position: absolute; border-radius: 50%; filter: blur(130px); opacity: 0.12; animation: orbDrift 20s ease-in-out infinite; }
        .ambient-orb.orb-gold { width: 720px; height: 720px; background: radial-gradient(circle, rgba(232,168,23,0.5) 0%, transparent 72%); top: -280px; right: -160px; }
        .ambient-orb.orb-emerald { width: 560px; height: 560px; background: radial-gradient(circle, rgba(16,185,129,0.4) 0%, transparent 72%); bottom: -220px; left: -140px; animation-delay: -8s; }
        .ambient-orb.orb-copper { width: 500px; height: 500px; background: radial-gradient(circle, rgba(199,125,75,0.32) 0%, transparent 72%); top: 42%; left: 52%; animation-delay: -14s; }
        @keyframes orbDrift {
            0%,100% { transform: translate(0,0) scale(1); }
            18% { transform: translate(55px,-35px) scale(1.07); }
            36% { transform: translate(-28px,48px) scale(0.94); }
            54% { transform: translate(-50px,-22px) scale(1.04); }
            72% { transform: translate(38px,30px) scale(0.96); }
            90% { transform: translate(12px,-15px) scale(1.02); }
        }
        .grid-texture { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; opacity: 0.022;
            background-image: linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
            background-size: 56px 56px; }

        /* 导航栏 */
        header { background: rgba(7,10,14,0.84); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-subtle); position: sticky; top: 0; z-index: 100; transition: all 0.35s; }
        header.scrolled { background: rgba(7,10,14,0.95); box-shadow: 0 4px 28px rgba(0,0,0,0.5); border-bottom-color: rgba(232,168,23,0.12); }
        .nav-container { max-width: 1280px; margin: 0 auto; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; }
        .logo { font-size: 1.5rem; font-weight: 800; color: #fff; text-decoration: none; display: flex; align-items: center; gap: 0.65rem; letter-spacing: -0.3px; white-space: nowrap; }
        .logo svg { width: 36px; height: 36px; stroke: var(--accent-gold); fill: none; stroke-width: 2; filter: drop-shadow(0 0 10px var(--accent-gold-glow)); transition: filter 0.3s; }
        .logo:hover svg { filter: drop-shadow(0 0 20px rgba(232,168,23,0.55)); }
        .nav-links { display: flex; gap: 1.8rem; list-style: none; align-items: center; }
        .nav-links a { text-decoration: none; color: var(--text-secondary); font-weight: 530; font-size: 0.9rem; padding: 0.35rem 0; position: relative; white-space: nowrap; transition: color 0.25s; }
        .nav-links a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--accent-gold); border-radius: 2px; transition: width 0.28s; }
        .nav-links a:hover, .nav-links a.active { color: #fff; }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .nav-links a.active { color: var(--accent-gold-light); }
        .nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
        .nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--text-primary); margin: 6px 0; border-radius: 2px; transition: 0.3s; }

        @media (max-width: 900px) {
            .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(7,10,14,0.97); backdrop-filter: blur(22px); flex-direction: column; gap: 0; padding: 0.8rem 0; border-radius: 0 0 var(--radius-md) var(--radius-md); }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 1rem 2rem; width: 100%; border-bottom: 1px solid rgba(255,255,255,0.03); }
            .nav-toggle { display: block; }
        }

        /* Hero */
        .hero { position: relative; padding: 5rem 2rem 4rem; text-align: center; z-index: 1; }
        .hero-container { max-width: 820px; margin: 0 auto; }
        .hero-badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.45rem 1.2rem; border-radius: var(--radius-full); background: var(--accent-gold-soft); border: 1px solid var(--border-warm); color: var(--accent-gold-light); font-size: 0.84rem; font-weight: 630; margin-bottom: 2rem; animation: badgeGlow 3s infinite; }
        @keyframes badgeGlow { 0%,100% { box-shadow: 0 0 0 transparent; } 50% { box-shadow: 0 0 26px rgba(232,168,23,0.28); } }
        .hero h1 { font-size: 3rem; font-weight: 850; margin-bottom: 1.2rem; line-height: 1.16; background: linear-gradient(145deg, #fff 0%, #e8d5a3 35%, #c9a855 70%, #a68b3f 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.7px; }
        .hero p { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 2.6rem; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-group { display: flex; justify-content: center; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
        .btn { display: inline-flex; align-items: center; gap: 0.6rem; padding: 0.9rem 2.1rem; font-size: 0.96rem; font-weight: 620; border-radius: 10px; text-decoration: none; transition: all var(--transition-smooth); cursor: pointer; }
        .btn-primary { background: linear-gradient(135deg, #e8a817, #c78d14); color: #0d0a02; box-shadow: 0 0 30px var(--accent-gold-glow); border: none; }
        .btn-primary:hover { transform: translateY(-4px); box-shadow: 0 0 48px rgba(232,168,23,0.48); }
        .btn-secondary { background: rgba(255,255,255,0.03); color: #fff; border: 1px solid var(--border-subtle); }
        .btn-secondary:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }

        .section-container { max-width: 1200px; margin: 0 auto; padding: 4.5rem 2rem; position: relative; z-index: 1; }
        .section-header { text-align: center; margin-bottom: 3.5rem; }
        .section-subtitle { color: var(--accent-gold-light); font-size: 0.82rem; font-weight: 720; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 0.5rem; display: block; }
        .section-title { font-size: 2.2rem; font-weight: 750; color: #fff; letter-spacing: -0.35px; }
        .section-desc { color: var(--text-secondary); font-size: 1rem; margin-top: 0.75rem; max-width: 620px; margin-left: auto; margin-right: auto; }

        /* 平台卡片 */
        .platform-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.4rem; }
        .platform-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 1.8rem 1.5rem; text-align: center; transition: all var(--transition-smooth); backdrop-filter: blur(10px); cursor: pointer; }
        .platform-card:hover { border-color: var(--border-active); transform: translateY(-6px); box-shadow: var(--shadow-card), var(--shadow-glow-gold); }
        .platform-icon { font-size: 2.4rem; margin-bottom: 0.8rem; }
        .platform-card h3 { font-size: 1.1rem; color: #fff; margin-bottom: 0.4rem; }
        .platform-card p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 1.2rem; }
        .platform-card .badge { display: inline-block; padding: 0.2rem 0.8rem; border-radius: var(--radius-full); background: var(--accent-gold-soft); color: var(--accent-gold-light); font-size: 0.72rem; font-weight: 650; }

        /* 安装步骤 */
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.3rem; }
        .step-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 1.7rem 1.5rem; text-align: center; transition: all var(--transition-smooth); backdrop-filter: blur(10px); }
        .step-card:hover { border-color: var(--border-emerald); box-shadow: var(--shadow-glow-emerald); transform: translateY(-4px); }
        .step-num { display: inline-block; width: 42px; height: 42px; line-height: 42px; border-radius: 50%; background: rgba(16,185,129,0.12); color: var(--accent-emerald); font-weight: 800; font-size: 1.1rem; margin-bottom: 1rem; }
        .step-card h4 { color: #fff; font-size: 1.05rem; margin-bottom: 0.5rem; }
        .step-card p { color: var(--text-secondary); font-size: 0.88rem; }

        /* 安全校验 */
        .checksum-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 1rem; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 1.5rem 2rem; backdrop-filter: blur(10px); }
        .checksum-code { font-family: 'Courier New', monospace; background: rgba(0,0,0,0.3); padding: 0.6rem 1.2rem; border-radius: 8px; color: var(--accent-gold-light); letter-spacing: 1px; font-size: 0.9rem; word-break: break-all; }
        .checksum-label { color: var(--text-secondary); font-size: 0.85rem; }

        /* 版本特性卡片 - 补充缺失的CSS */
        .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
        .feature-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 1.8rem 1.5rem; transition: all var(--transition-smooth); backdrop-filter: blur(10px); }
        .feature-card:hover { border-color: var(--border-active); transform: translateY(-6px); box-shadow: var(--shadow-card), var(--shadow-glow-gold); }
        .feature-card h3 { font-size: 1.1rem; color: #fff; margin-bottom: 0.5rem; }
        .feature-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.5; }

        /* CTA */
        .cta-banner { background: var(--bg-elevated); border-radius: var(--radius-lg); padding: 3rem 2.5rem; text-align: center; backdrop-filter: blur(14px); max-width: 880px; margin: 0 auto; position: relative; overflow: hidden; }
        .cta-banner::before { content: ''; position: absolute; top: -60%; left: -60%; width: 220%; height: 220%; background: radial-gradient(circle at 45% 50%, rgba(232,168,23,0.07) 0%, transparent 62%); pointer-events: none; }
        .cta-banner h3 { font-size: 1.65rem; color: #fff; margin-bottom: 0.75rem; position: relative; }

        /* 页脚 */
        footer { background: rgba(5,8,12,0.93); color: var(--text-tertiary); padding: 3.5rem 2rem 2rem; border-top: 1px solid var(--border-subtle); position: relative; z-index: 1; }
        .footer-container { max-width: 1200px; margin: 0 auto; display: flex; flex-direction: column; gap: 2rem; }
        .footer-links { display: flex; flex-wrap: wrap; gap: 1.8rem; justify-content: center; }
        .footer-links a { color: var(--text-tertiary); text-decoration: none; font-size: 0.86rem; transition: color 0.25s; }
        .footer-links a:hover { color: var(--accent-gold-light); }
        .footer-copyright { text-align: center; font-size: 0.81rem; border-top: 1px solid var(--border-subtle); padding-top: 1.8rem; color: #55524d; }

        @media (max-width: 600px) {
            .hero h1 { font-size: 1.9rem !important; }
            .section-title { font-size: 1.5rem !important; }
            .btn { width: 100%; justify-content: center; }
            .checksum-bar { flex-direction: column; text-align: center; }
        }