:root {
            --primary-500: #10b981;
            --primary-600: #059669;
            --primary-700: #047857;
            --primary-900: #064e3b;
            --accent-400: #34d399;
            --accent-500: #10b981;
            --gold-400: #fbbf24;
            --gold-500: #f59e0b;
            --gold-600: #d97706;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --white: #ffffff;
            --green-500: #10b981;
            --green-600: #059669;
            --red-500: #ef4444;
            --radius-2xl: 1.25rem;
            --radius-xl: 1rem;
            --radius-lg: 0.75rem;
            --radius-md: 0.5rem;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 2px rgba(15,23,42,0.04);
            --shadow-md: 0 8px 24px rgba(15,23,42,0.07);
            --shadow-lg: 0 18px 40px rgba(15,23,42,0.10);
            --shadow-xl: 0 24px 56px rgba(15,23,42,0.13);
            --ease: 0.22s cubic-bezier(0.4,0,0.2,1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            color: var(--slate-800);
            background: var(--slate-50);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            font-display: swap;
        }
        /* 导航栏 */
        .nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--slate-200);
        }
        .nav-inner {
            max-width: 1240px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 800;
            font-size: 20px;
            color: var(--slate-900);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .nav-logo svg {
            width: 34px;
            height: 34px;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }
        .nav-links a {
            text-decoration: none;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--slate-500);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            transition: var(--ease);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--primary-600);
            background: rgba(16,185,129,0.07);
        }
        .nav-links a.nav-active {
            color: var(--primary-700);
            background: rgba(16,185,129,0.12);
            font-weight: 700;
        }
        .nav-links a.nav-report {
            color: var(--red-500);
            font-weight: 700;
        }
        .nav-links a.nav-report:hover {
            background: rgba(239,68,68,0.07);
            color: #dc2626;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-inner {
                padding: 10px 16px;
            }
            .nav-logo {
                font-size: 17px;
            }
            .nav-logo svg {
                width: 28px;
                height: 28px;
            }
        }
        /* Hero */
        .hero {
            max-width: 1240px;
            margin: 0 auto;
            padding: 60px 24px 36px;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(16,185,129,0.06);
            border: 1px solid rgba(16,185,129,0.16);
            padding: 6px 18px;
            border-radius: var(--radius-full);
            font-size: 12.5px;
            font-weight: 700;
            color: var(--primary-700);
            margin-bottom: 22px;
            letter-spacing: 0.2px;
        }
        .hero-badge::before {
            content: '';
            width: 7px;
            height: 7px;
            background: var(--green-500);
            border-radius: 50%;
            animation: pulse 2.2s infinite;
        }
        @keyframes pulse {
            0%,100% { opacity:1; box-shadow: 0 0 0 0 rgba(16,185,129,0.5);}
            50% { opacity:0.4; box-shadow: 0 0 0 8px rgba(16,185,129,0);}
        }
        .hero h1 {
            font-size: clamp(28px, 5vw, 50px);
            font-weight: 900;
            color: var(--slate-900);
            letter-spacing: -1.2px;
            line-height: 1.18;
            margin-bottom: 16px;
        }
        .hero h1 .accent {
            background: linear-gradient(135deg, #10b981 0%, #f59e0b 70%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero>p {
            font-size: 16px;
            color: var(--slate-500);
            max-width: 660px;
            margin: 0 auto 34px;
            line-height: 1.75;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: #fff;
            text-decoration: none;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 15px;
            transition: var(--ease);
            letter-spacing: -0.2px;
            box-shadow: 0 6px 20px rgba(5,150,105,0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(5,150,105,0.35);
            background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--white);
            color: var(--slate-700);
            text-decoration: none;
            padding: 13px 26px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 14px;
            border: 1.5px solid var(--slate-200);
            transition: var(--ease);
        }
        .btn-outline:hover {
            border-color: var(--primary-600);
            color: var(--primary-600);
            background: rgba(16,185,129,0.03);
        }
        .btn-ghost-sm {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: transparent;
            color: var(--slate-500);
            text-decoration: none;
            padding: 12px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 13.5px;
            border: 1px solid transparent;
            transition: var(--ease);
        }
        .btn-ghost-sm:hover {
            border-color: var(--slate-200);
            color: var(--slate-800);
            background: var(--white);
        }
        /* 数据条 */
        .trust-strip {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 16px;
            text-align: center;
        }
        .trust-item {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-lg);
            padding: 20px 14px;
            transition: var(--ease);
        }
        .trust-item:hover {
            border-color: var(--primary-600);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .trust-item .t-val {
            font-size: 28px;
            font-weight: 900;
            color: var(--primary-700);
            letter-spacing: -0.8px;
            line-height: 1;
        }
        .trust-item .t-label {
            font-size: 12.5px;
            color: var(--slate-500);
            margin-top: 4px;
            font-weight: 600;
        }
        /* 通用标题 */
        .sec-title {
            font-size: clamp(22px, 3vw, 28px);
            font-weight: 800;
            color: var(--slate-900);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }
        .sec-title::before {
            content: '';
            width: 4px;
            height: 22px;
            background: linear-gradient(180deg, #10b981 0%, #f59e0b 100%);
            border-radius: 2px;
            flex-shrink: 0;
        }
        .sec-sub {
            font-size: 14.5px;
            color: var(--slate-500);
            margin-bottom: 32px;
            max-width: 600px;
            line-height: 1.6;
        }
        /* 稳定版特性卡片 */
        .features-section {
            max-width: 1240px;
            margin: 0 auto 56px;
            padding: 0 24px;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }
        .feature-card {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            transition: var(--ease);
            position: relative;
        }
        .feature-card:hover {
            border-color: var(--primary-600);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .feature-card .fc-icon {
            width: 42px;
            height: 42px;
            margin-bottom: 14px;
            color: var(--primary-600);
        }
        .feature-card .fc-icon svg {
            width: 100%;
            height: 100%;
        }
        .feature-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 13px;
            color: var(--slate-500);
            line-height: 1.65;
        }
        .feature-card .fc-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            font-size: 10px;
            font-weight: 700;
            background: rgba(16,185,129,0.1);
            color: var(--primary-600);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            letter-spacing: 0.3px;
        }
        /* 下载与更新大卡片 */
        .dl-section {
            max-width: 1240px;
            margin: 0 auto 56px;
            padding: 0 24px;
        }
        .dl-card {
            background: linear-gradient(150deg, #064e3b 0%, #065f46 40%, #0f172a 100%);
            border-radius: var(--radius-2xl);
            padding: 48px 40px;
            color: #fff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
        }
        .dl-card::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(16,185,129,0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .dl-card h3 {
            font-size: 26px;
            font-weight: 800;
            letter-spacing: -0.4px;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .dl-card .dl-desc {
            font-size: 14px;
            color: #a7f3d0;
            margin-bottom: 24px;
            line-height: 1.65;
            position: relative;
            z-index: 1;
        }
        .dl-btns {
            display: flex;
            flex-direction: column;
            gap: 10px;
            position: relative;
            z-index: 1;
        }
        .dl-btns .btn-gold {
            display: block;
            text-align: center;
            background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
            color: #1a1a2e;
            text-decoration: none;
            padding: 14px 20px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 15px;
            transition: var(--ease);
            letter-spacing: -0.2px;
        }
        .dl-btns .btn-gold:hover {
            background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(217,119,6,0.35);
        }
        .dl-btns .btn-ghost-light {
            display: block;
            text-align: center;
            color: #fff;
            text-decoration: none;
            padding: 12px 20px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 13.5px;
            border: 1px solid rgba(255,255,255,0.2);
            transition: var(--ease);
            background: rgba(255,255,255,0.04);
        }
        .dl-btns .btn-ghost-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.4);
        }
        .dl-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 1;
        }
        .dl-visual svg {
            width: 100%;
            max-width: 220px;
            height: auto;
            opacity: 0.9;
        }
        @media (max-width: 768px) {
            .dl-card {
                grid-template-columns: 1fr;
                padding: 30px 22px;
                text-align: center;
            }
            .dl-visual { display: none; }
            .dl-btns { align-items: center; }
            .dl-btns .btn-gold, .dl-btns .btn-ghost-light { width: 100%; max-width: 320px; }
        }
        /* 更新日志板块 */
        .changelog-section {
            max-width: 1240px;
            margin: 0 auto 56px;
            padding: 0 24px;
        }
        .changelog-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 44px 36px;
            box-shadow: var(--shadow-sm);
        }
        .changelog-timeline {
            position: relative;
            padding-left: 28px;
        }
        .changelog-timeline::before {
            content: '';
            position: absolute;
            left: 7px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: linear-gradient(to bottom, #10b981, #d97706, #e2e8f0);
            border-radius: 1px;
        }
        .cl-item {
            position: relative;
            margin-bottom: 32px;
        }
        .cl-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 5px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--white);
            border: 3px solid #10b981;
            box-sizing: border-box;
            z-index: 2;
        }
        .cl-date {
            font-size: 12px;
            font-weight: 700;
            color: #059669;
            margin-bottom: 4px;
            letter-spacing: 0.4px;
            text-transform: uppercase;
        }
        .cl-body {
            background: var(--slate-50);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            transition: var(--ease);
        }
        .cl-body:hover {
            border-color: #10b981;
            box-shadow: var(--shadow-md);
        }
        .cl-body h4 {
            font-size: 16px;
            color: var(--slate-900);
            font-weight: 700;
            margin-bottom: 5px;
        }
        .cl-body p {
            font-size: 13px;
            color: var(--slate-500);
            line-height: 1.6;
        }
        /* 安全架构 */
        .security-section {
            max-width: 1240px;
            margin: 0 auto 56px;
            padding: 0 24px;
        }
        .security-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 44px 36px;
            box-shadow: var(--shadow-sm);
        }
        .security-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 18px;
        }
        .sec-item {
            border-left: 3px solid var(--slate-200);
            padding-left: 18px;
            transition: var(--ease);
            cursor: default;
        }
        .sec-item:hover {
            border-left-color: var(--gold-500);
            transform: translateX(3px);
        }
        .sec-item h4 {
            font-size: 14.5px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 5px;
        }
        .sec-item p {
            font-size: 12.5px;
            color: var(--slate-500);
            line-height: 1.6;
        }
        /* 安装步骤 */
        .steps-section {
            max-width: 1240px;
            margin: 0 auto 56px;
            padding: 0 24px;
        }
        .steps-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 44px 36px;
            box-shadow: var(--shadow-sm);
        }
        .steps-grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .step-card {
            text-align: center;
            padding: 28px 16px;
            border-radius: var(--radius-lg);
            background: var(--slate-50);
            border: 1px solid transparent;
            transition: var(--ease);
            position: relative;
        }
        .step-card:hover {
            border-color: var(--slate-200);
            background: var(--white);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .step-card .step-num {
            font-size: 44px;
            font-weight: 900;
            color: rgba(16,185,129,0.06);
            position: absolute;
            top: 4px;
            right: 14px;
            line-height: 1;
            pointer-events: none;
        }
        .step-card .step-icon-s {
            width: 40px;
            height: 40px;
            margin: 0 auto 10px;
            color: var(--primary-600);
        }
        .step-card .step-icon-s svg {
            width: 100%;
            height: 100%;
        }
        .step-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 4px;
        }
        .step-card p {
            font-size: 12.5px;
            color: var(--slate-500);
            line-height: 1.55;
        }
        /* FAQ */
        .faq-section {
            max-width: 1240px;
            margin: 0 auto 56px;
            padding: 0 24px;
        }
        .faq-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 44px 36px;
            box-shadow: var(--shadow-sm);
        }
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 12px;
            margin-bottom: 20px;
        }
        .faq-item {
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--ease);
        }
        .faq-item:hover {
            border-color: var(--primary-600);
        }
        .faq-item summary {
            padding: 15px 18px;
            font-weight: 700;
            font-size: 13.5px;
            color: var(--slate-800);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--slate-50);
            transition: var(--ease);
            gap: 8px;
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '+';
            font-size: 18px;
            color: var(--primary-600);
            font-weight: 500;
            flex-shrink: 0;
            transition: transform 0.2s;
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }
        .faq-item[open] summary {
            background: var(--white);
            color: var(--primary-700);
        }
        .faq-item p {
            padding: 0 18px 14px;
            font-size: 12.5px;
            color: var(--slate-500);
            line-height: 1.6;
        }
        .faq-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-weight: 700;
            font-size: 14px;
            color: var(--primary-600);
            text-decoration: none;
            transition: var(--ease);
        }
        .faq-more:hover {
            gap: 8px;
            color: var(--gold-600);
        }
        /* 页脚 */
        .footer {
            background: #064e3b;
            color: #d1fae5;
            padding: 56px 24px 28px;
        }
        .footer-grid {
            max-width: 1240px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 44px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand h4 {
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-brand p {
            font-size: 12.5px;
            color: #a7f3d0;
            max-width: 340px;
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .footer-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.12);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 11px;
            color: #6ee7b7;
            font-weight: 700;
        }
        .footer-status::before {
            content: '';
            width: 5px;
            height: 5px;
            background: #6ee7b7;
            border-radius: 50%;
            animation: pulse 2.2s infinite;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3,1fr);
            gap: 20px;
        }
        .footer-col h5 {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .footer-col ul { list-style: none; }
        .footer-col ul li { margin-bottom: 6px; }
        .footer-col ul li a {
            font-size: 12.5px;
            color: #a7f3d0;
            text-decoration: none;
            transition: color 0.15s;
        }
        .footer-col ul li a:hover { color: #fbbf24; }
        .footer-bar {
            max-width: 1240px;
            margin: 24px auto 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 11.5px;
            color: #6ee7b7;
            flex-wrap: wrap;
            gap: 12px;
        }
        .sha-badge {
            font-family: 'SF Mono','Cascadia Code','Consolas',monospace;
            background: rgba(255,255,255,0.06);
            padding: 3px 10px;
            border-radius: 4px;
            border: 1px solid rgba(255,255,255,0.12);
            color: #d1fae5;
            font-size: 10.5px;
        }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .footer-links { grid-template-columns: 1fr 1fr; gap: 20px; }
        }
        @media (max-width: 600px) {
            .footer-links { grid-template-columns: 1fr; gap: 16px; }
            .footer-bar { flex-direction: column; text-align: center; }
            .security-inner, .steps-inner, .faq-inner, .changelog-inner { padding: 28px 18px; }
        }
        @media (prefers-reduced-motion: reduce) {
            * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
            .hero-badge::before, .footer-status::before { animation: none; }
            .feature-card:hover, .step-card:hover, .btn-primary:hover, .sec-item:hover, .trust-item:hover { transform: none; }
        }