:root {
            --primary-400: #34d399;
            --primary-500: #10b981;
            --primary-600: #059669;
            --primary-700: #047857;
            --primary-900: #064e3b;
            --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（与首页一致） ========== */
        .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;
        }

        /* ========== Hero 下载页顶部 ========== */
        .hero {
            max-width: 1240px;
            margin: 0 auto;
            padding: 52px 24px 32px;
            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: 20px;
            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(26px, 4.5vw, 44px);
            font-weight: 900;
            color: var(--slate-900);
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 14px;
        }
        .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: 15px;
            color: var(--slate-500);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-stats-mini {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            font-size: 12.5px;
            color: var(--slate-500);
            font-weight: 600;
        }
        .hero-stats-mini span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--white);
            border: 1px solid var(--slate-200);
            padding: 5px 14px;
            border-radius: var(--radius-full);
        }
        .hero-stats-mini span::before {
            content: '';
            width: 5px;
            height: 5px;
            background: var(--primary-500);
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* ========== 通用标题 ========== */
        .sec-title {
            font-size: clamp(21px, 2.8vw, 26px);
            font-weight: 800;
            color: var(--slate-900);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 6px;
        }
        .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: 14px;
            color: var(--slate-500);
            margin-bottom: 30px;
            max-width: 600px;
            line-height: 1.6;
        }

        /* ========== 平台下载卡片网格 ========== */
        .platform-section {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
        }
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .platform-card {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-xl);
            padding: 26px 18px 22px;
            text-align: center;
            transition: var(--ease);
            position: relative;
            cursor: default;
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .platform-card:hover {
            border-color: var(--primary-500);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .platform-card .pf-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 12px;
            color: var(--primary-600);
            transition: var(--ease);
        }
        .platform-card:hover .pf-icon {
            color: var(--primary-700);
            transform: scale(1.06);
        }
        .platform-card .pf-icon svg {
            width: 100%;
            height: 100%;
        }
        .platform-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 3px;
        }
        .platform-card .pf-ver {
            font-size: 11px;
            color: var(--slate-400);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .platform-card .pf-size {
            font-size: 11px;
            color: var(--slate-500);
            background: var(--slate-100);
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-weight: 600;
        }
        .platform-card .pf-badge {
            position: absolute;
            top: 12px;
            right: 14px;
            font-size: 9.5px;
            font-weight: 700;
            background: rgba(16, 185, 129, 0.10);
            color: var(--primary-600);
            padding: 2px 9px;
            border-radius: var(--radius-full);
            letter-spacing: 0.3px;
        }

        /* ========== 下载大卡片（深色） ========== */
        .dl-hero-section {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
        }
        .dl-hero-card {
            background: linear-gradient(150deg, #064e3b 0%, #065f46 40%, #0f172a 100%);
            border-radius: var(--radius-2xl);
            padding: 44px 38px;
            color: #fff;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
        }
        .dl-hero-card::after {
            content: '';
            position: absolute;
            top: -70px;
            right: -50px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.18) 0%, transparent 68%);
            border-radius: 50%;
            pointer-events: none;
        }
        .dl-hero-card h3 {
            font-size: 24px;
            font-weight: 800;
            letter-spacing: -0.3px;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .dl-hero-card .dl-desc {
            font-size: 13.5px;
            color: #a7f3d0;
            margin-bottom: 22px;
            line-height: 1.65;
            position: relative;
            z-index: 1;
        }
        .dl-hero-btns {
            display: flex;
            flex-direction: column;
            gap: 10px;
            position: relative;
            z-index: 1;
        }
        .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;
        }
        .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);
        }
        .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);
        }
        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .dl-hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 1;
        }
        .dl-hero-visual svg {
            width: 100%;
            max-width: 200px;
            height: auto;
            opacity: 0.88;
        }

        /* ========== 安装指引步骤 ========== */
        .steps-section {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
        }
        .steps-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 42px 34px;
            box-shadow: var(--shadow-sm);
        }
        .steps-grid-4 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .step-card {
            text-align: center;
            padding: 26px 14px;
            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: 40px;
            font-weight: 900;
            color: rgba(16, 185, 129, 0.06);
            position: absolute;
            top: 2px;
            right: 12px;
            line-height: 1;
            pointer-events: none;
        }
        .step-card .step-icon-s {
            width: 38px;
            height: 38px;
            margin: 0 auto 10px;
            color: var(--primary-600);
        }
        .step-card .step-icon-s svg {
            width: 100%;
            height: 100%;
        }
        .step-card h4 {
            font-size: 14.5px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 4px;
        }
        .step-card p {
            font-size: 12px;
            color: var(--slate-500);
            line-height: 1.5;
        }

        /* ========== 安全校验提示区 ========== */
        .verify-section {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
        }
        .verify-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 38px 34px;
            box-shadow: var(--shadow-sm);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
        }
        .verify-text h3 {
            font-size: 19px;
            font-weight: 800;
            color: var(--slate-900);
            margin-bottom: 8px;
        }
        .verify-text p {
            font-size: 13px;
            color: var(--slate-500);
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .verify-code {
            background: var(--slate-900);
            color: #34d399;
            font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            padding: 18px 20px;
            border-radius: var(--radius-lg);
            font-size: 12px;
            line-height: 1.8;
            word-break: break-all;
            overflow-x: auto;
            letter-spacing: 0.2px;
        }
        .verify-code span {
            color: #fbbf24;
        }

        /* ========== 版本更新日志 ========== */
        .changelog-section {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
        }
        .changelog-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 42px 34px;
            box-shadow: var(--shadow-sm);
        }
        .cl-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 14px;
        }
        .cl-item {
            background: var(--slate-50);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-lg);
            padding: 18px 20px;
            transition: var(--ease);
        }
        .cl-item:hover {
            border-color: var(--primary-500);
            box-shadow: var(--shadow-md);
        }
        .cl-item .cl-date {
            font-size: 11px;
            font-weight: 700;
            color: var(--primary-600);
            margin-bottom: 3px;
            letter-spacing: 0.3px;
        }
        .cl-item h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 4px;
        }
        .cl-item p {
            font-size: 12px;
            color: var(--slate-500);
            line-height: 1.55;
        }

        /* ========== FAQ ========== */
        .faq-section {
            max-width: 1240px;
            margin: 0 auto 48px;
            padding: 0 24px;
        }
        .faq-inner {
            background: var(--white);
            border: 1px solid var(--slate-200);
            border-radius: var(--radius-2xl);
            padding: 42px 34px;
            box-shadow: var(--shadow-sm);
        }
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
            gap: 10px;
            margin-bottom: 18px;
        }
        .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: 14px 16px;
            font-weight: 700;
            font-size: 13px;
            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: 17px;
            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 16px 13px;
            font-size: 12px;
            color: var(--slate-500);
            line-height: 1.55;
        }
        .faq-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-weight: 700;
            font-size: 13.5px;
            color: var(--primary-600);
            text-decoration: none;
            transition: var(--ease);
        }
        .faq-more:hover {
            gap: 8px;
            color: var(--gold-600);
        }

        /* ========== 页脚（与首页一致） ========== */
        .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;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .dl-hero-card {
                grid-template-columns: 1fr;
                padding: 28px 22px;
                text-align: center;
            }
            .dl-hero-visual {
                display: none;
            }
            .verify-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        @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;
            }
            .platform-grid {
                grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
                gap: 10px;
            }
            .platform-card {
                padding: 20px 12px 16px;
            }
            .platform-card .pf-icon {
                width: 36px;
                height: 36px;
            }
            .platform-card h3 {
                font-size: 13px;
            }
            .steps-inner,
            .verify-inner,
            .changelog-inner,
            .faq-inner {
                padding: 28px 18px;
            }
            .steps-grid-4 {
                grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
                gap: 10px;
            }
            .cl-list {
                grid-template-columns: 1fr;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 24px;
            }
        }
        @media (max-width: 600px) {
            .footer-links {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-bar {
                flex-direction: column;
                text-align: center;
            }
            .hero-stats-mini {
                gap: 8px;
                font-size: 11px;
            }
            .hero-stats-mini span {
                padding: 4px 10px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            * {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
            .hero-badge::before,
            .footer-status::before {
                animation: none;
            }
            .platform-card:hover,
            .step-card:hover,
            .btn-gold:hover,
            .cl-item:hover {
                transform: none;
            }
        }