:root {
            --violet-50: #f5f2ff;
            --violet-100: #ede7ff;
            --violet-400: #a78bfa;
            --violet-500: #7c3aed;
            --violet-600: #6d28d9;
            --violet-700: #4f46e5;
            --indigo-600: #4f46e5;
            --indigo-700: #4338ca;
            --slate-900: #1a142b;
            --slate-700: #3a3450;
            --slate-500: #6b6480;
            --slate-400: #7a748a;
            --slate-300: #b0aac0;
            --white-soft: #faf8ff;
            --white-pure: #ffffff;
            --radius-xl: 32px;
            --radius-lg: 24px;
            --radius-full: 60px;
            --shadow-card: 0 4px 20px rgba(79, 70, 229, 0.06);
            --shadow-hover: 0 14px 36px rgba(124, 58, 237, 0.12);
            --shadow-btn: 0 8px 26px rgba(79, 70, 229, 0.28);
            --shadow-btn-hover: 0 14px 36px rgba(79, 70, 229, 0.42);
            --blur-bg: rgba(255, 255, 255, 0.55);
            --border-subtle: rgba(124, 58, 237, 0.07);
            --border-medium: rgba(124, 58, 237, 0.16);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', Roboto, sans-serif;
            background: var(--violet-50);
            color: var(--slate-900);
            line-height: 1.55;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; transition: color 0.22s ease; }
        ul { list-style: none; padding: 0; margin: 0; }
        .container { max-width: 1220px; margin: 0 auto; padding: 0 28px; }

        /* Header */
        .header {
            background: var(--blur-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.45);
            padding: 13px 0;
            position: sticky;
            top: 0;
            z-index: 60;
        }
        .header-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
        .logo { display: flex; align-items: center; gap: 10px; font-weight: 750; font-size: 23px; letter-spacing: -0.4px; }
        .logo svg { display: block; }
        .logo .brand {
            background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo .year-tag {
            font-size: 12px; font-weight: 550; color: #7c7a8a;
            background: rgba(124, 58, 237, 0.1); padding: 3px 13px;
            border-radius: 40px; -webkit-text-fill-color: #6b6480; letter-spacing: 0.2px;
        }
        .nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
        .nav>li { position: relative; list-style: none; }
        .nav>li>a, .nav>li>.nav-label {
            display: inline-flex; align-items: center; gap: 5px; font-size: 14.5px;
            font-weight: 530; color: var(--slate-700); padding: 8px 14px;
            border-radius: 40px; cursor: pointer; transition: 0.22s; letter-spacing: 0.1px;
            white-space: nowrap; background: transparent; border: none; font-family: inherit;
        }
        .nav>li>a:hover, .nav>li>.nav-label:hover { color: var(--indigo-600); background: rgba(124, 58, 237, 0.06); }
        .nav>li>a.active {
            color: var(--indigo-600); font-weight: 650;
            background: rgba(124, 58, 237, 0.08); box-shadow: 0 0 0 1px rgba(124, 58, 237, 0.12);
        }
        .nav .pill-link {
            background: var(--indigo-600); color: #fff !important; font-size: 12.5px;
            padding: 9px 18px; border-radius: 40px; font-weight: 620;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.24); letter-spacing: 0.2px; margin-left: 8px;
        }
        .nav .pill-link:hover { background: #7c3aed; box-shadow: 0 7px 22px rgba(124, 58, 237, 0.34); }
        .nav .arrow-icon { width: 14px; height: 14px; transition: transform 0.25s; opacity: 0.5; }
        .nav>li:hover>.nav-label .arrow-icon { transform: rotate(180deg); opacity: 1; }
        .nav .dropdown {
            position: absolute; top: calc(100% + 8px); left: 0; min-width: 210px;
            background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(20px);
            border-radius: 20px; padding: 8px; box-shadow: 0 20px 48px rgba(79, 70, 229, 0.14);
            border: 1px solid rgba(124, 58, 237, 0.1); opacity: 0; visibility: hidden;
            transform: translateY(8px); transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            z-index: 70; display: flex; flex-direction: column;
        }
        .nav>li:hover>.dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
        .nav .dropdown li a {
            display: flex; align-items: center; gap: 8px; padding: 10px 14px;
            border-radius: 14px; font-size: 13.5px; font-weight: 500; color: var(--slate-700);
            transition: 0.2s; white-space: nowrap;
        }
        .nav .dropdown li a:hover { background: rgba(124, 58, 237, 0.07); color: var(--indigo-600); font-weight: 600; }
        .mobile-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 5px; }
        .mobile-toggle span { display: block; width: 27px; height: 2.6px; background: var(--slate-900); border-radius: 4px; }

        /* Hero */
        .page-hero {
            padding: 56px 0 38px;
            background: linear-gradient(150deg, #ede7ff 0%, #f5f2ff 60%, #faf8ff 100%);
            border-bottom: 1px solid rgba(124, 58, 237, 0.07);
        }
        .hero-flex { display: flex; flex-wrap: wrap; align-items: center; gap: 40px; }
        .hero-text { flex: 1; }
        .hero-text h1 { font-size: 44px; font-weight: 820; letter-spacing: -0.03em; margin-bottom: 12px; }
        .hero-text h1 .accent {
            background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .hero-text .sub { font-size: 17px; color: #4a4460; margin-bottom: 24px; }
        .hero-badge { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 28px; }
        .hero-badge span { background: rgba(124,58,237,0.08); padding: 8px 18px; border-radius: 40px; font-size: 14px; font-weight: 500; color: #4f46e5; }
        .btn-download-hero {
            display: inline-flex; align-items: center; gap: 8px; padding: 16px 40px;
            border-radius: 60px; background: linear-gradient(135deg, #7c3aed, #4f46e5);
            color: #fff; font-weight: 700; font-size: 18px; box-shadow: var(--shadow-btn);
            transition: 0.25s; cursor: pointer;
        }
        .btn-download-hero:hover { transform: translateY(-3px); box-shadow: var(--shadow-btn-hover); }
        .hero-visual {
            flex: 0 0 300px; background: rgba(255,255,255,0.5); backdrop-filter: blur(8px);
            border-radius: 38px; aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center;
            border: 1px solid rgba(255,255,255,0.7); position: relative; overflow: hidden; min-height: 200px;
            box-shadow: 0 18px 44px rgba(79,70,229,0.07);
        }
        .hero-visual .img-placeholder { width: 100%; height: 100%; object-fit: cover; opacity: 0.6; }

        /* 安装步骤 */
        .install-steps { padding: 58px 0 56px; background: var(--white-pure); }
        .section-title { text-align: center; margin-bottom: 44px; }
        .section-title h2 { font-size: 34px; font-weight: 800; }
        .section-title h2 .accent { background: linear-gradient(135deg, #7c3aed, #4f46e5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .section-title p { font-size: 17px; color: #5a5470; max-width: 600px; margin: 8px auto 0; }
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .step-card {
            background: var(--white-soft); border-radius: var(--radius-lg); padding: 28px 22px;
            text-align: center; border: 1px solid var(--border-subtle); transition: 0.3s; position: relative;
        }
        .step-card:hover { border-color: #7c3aed; box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .step-num {
            display: inline-block; width: 48px; height: 48px; line-height: 48px; border-radius: 50%;
            background: linear-gradient(135deg, #7c3aed, #4f46e5); color: #fff; font-weight: 750; font-size: 20px; margin-bottom: 12px;
        }
        .step-card h4 { font-size: 19px; font-weight: 700; margin-bottom: 6px; }
        .step-card p { font-size: 14px; color: #5a5470; }

        /* 安全承诺 */
        .security-badges {
            padding: 54px 0 56px; background: var(--violet-50);
            border-top: 1px solid rgba(124,58,237,0.05); border-bottom: 1px solid rgba(124,58,237,0.05);
        }
        .badge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .badge-card {
            background: var(--white-pure); border-radius: var(--radius-lg); padding: 24px 22px;
            text-align: center; border: 1px solid rgba(124,58,237,0.05); transition: 0.25s;
        }
        .badge-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(124,58,237,0.15); }
        .badge-icon { font-size: 40px; margin-bottom: 10px; }
        .badge-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 2px; }
        .badge-card p { font-size: 14px; color: #5a5470; }

        /* 一键加速模拟 + 性能对比 */
        .one-click { padding: 56px 0 54px; background: var(--white-pure); border-top: 1px solid rgba(124,58,237,0.04); }
        .click-demo { display: flex; flex-wrap: wrap; gap: 28px; align-items: center; margin-top: 20px; }
        .demo-box {
            flex: 1; background: var(--white-soft); border-radius: var(--radius-lg);
            padding: 28px 24px; border: 1px solid var(--border-subtle); text-align: center;
        }
        .big-btn {
            display: inline-block; padding: 16px 48px; border-radius: 60px;
            background: linear-gradient(135deg, #7c3aed, #4f46e5); color: #fff; font-weight: 700; font-size: 18px;
            box-shadow: 0 8px 24px rgba(79,70,229,0.3); cursor: pointer; transition: 0.25s;
        }
        .big-btn:hover { transform: scale(1.04); box-shadow: 0 12px 34px rgba(79,70,229,0.42); }
        .demo-box .status { margin-top: 16px; color: #4f46e5; font-weight: 600; }
        .perf-compare { flex: 1; }
        .perf-item { margin-bottom: 16px; }
        .perf-label { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
        .perf-bar { height: 8px; background: rgba(124,58,237,0.1); border-radius: 8px; overflow: hidden; }
        .perf-fill { height: 100%; background: linear-gradient(90deg, #7c3aed, #4f46e5); border-radius: 8px; width: 0%; }

        /* 兼容性清单 */
        .compatibility {
            padding: 50px 0 52px; background: var(--violet-50);
            border-top: 1px solid rgba(124,58,237,0.05);
        }
        .comp-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; margin-top: 20px; }
        .comp-item {
            background: var(--white-pure); border-radius: 20px; padding: 20px 16px; text-align: center;
            border: 1px solid rgba(124,58,237,0.04); font-size: 15px; font-weight: 500; color: var(--slate-700);
        }
        .comp-item:hover { border-color: #7c3aed; box-shadow: var(--shadow-hover); }

        /* Footer */
        .footer {
            background: #1a142b; color: #b0aac0; padding: 44px 0 26px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-inner { display: grid; grid-template-columns: repeat(auto-fit, minmax(155px, 1fr)); gap: 30px; }
        .footer-col h5 { color: #e8e3f0; font-size: 15.5px; font-weight: 620; margin-bottom: 11px; }
        .footer-col p, .footer-col li { font-size: 13.5px; line-height: 1.85; color: #b0aac0; }
        .footer-col ul li { margin-bottom: 1px; }
        .footer-col a { color: #b0aac0; transition: 0.2s; }
        .footer-col a:hover { color: #d0c8e8; }
        .footer-bottom {
            margin-top: 26px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.04);
            display: flex; flex-wrap: wrap; justify-content: space-between; font-size: 12.5px; color: #7a748a; gap: 10px;
        }
        .footer-bottom .meta-group { display: flex; flex-wrap: wrap; gap: 16px; }

        @media (max-width: 900px) {
            .hero-flex { flex-direction: column; }
            .hero-visual { width: 100%; flex: auto; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .badge-grid { grid-template-columns: 1fr 1fr; }
            .click-demo { flex-direction: column; }
        }
        @media (max-width: 720px) {
            .nav { display: none; width: 100%; flex-direction: column; gap: 2px; padding: 12px 0; border-top: 1px solid rgba(124,58,237,0.1); }
            .nav.open { display: flex; }
            .mobile-toggle { display: flex; }
            .header-inner { flex-wrap: wrap; }
            .page-hero h1 { font-size: 32px; }
            .steps-grid { grid-template-columns: 1fr; }
            .badge-grid { grid-template-columns: 1fr; }
            .footer-inner { grid-template-columns: 1fr 1fr; }
            .footer-bottom { flex-direction: column; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            .page-hero h1 { font-size: 26px; }
            .footer-inner { grid-template-columns: 1fr; }
        }