:root {
            --bg-deep: #080d1a;
            --bg-elevated: #0f172a;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.1);
            --glass-border-strong: rgba(255, 255, 255, 0.18);

            --accent-cyan: #38bdf8;
            --accent-purple: #a78bfa;
            --accent-teal: #2dd4bf;
            --accent-rose: #fb7185;
            --accent-amber: #fbbf24;
            --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #a78bfa 45%, #2dd4bf 100%);
            --accent-gradient-warm: linear-gradient(135deg, #fb7185 0%, #fbbf24 50%, #2dd4bf 100%);

            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --text-dim: #64748b;

            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;

            --max-width: 1280px;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 999px;

            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow-cyan: 0 0 30px rgba(56, 189, 248, 0.3);
            --shadow-glow-purple: 0 0 30px rgba(167, 139, 250, 0.3);
            --shadow-glow-teal: 0 0 30px rgba(45, 212, 191, 0.3);
        }

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

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

        body {
            background: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 10% -10%, rgba(56, 189, 248, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 95% 10%, rgba(167, 139, 250, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 110%, rgba(45, 212, 191, 0.04) 0%, transparent 60%);
            color: var(--text-main);
            font-family: var(--font-sans);
            min-height: 100vh;
            line-height: 1.65;
            overflow-x: hidden;
            font-size: 16px;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        ::selection {
            background: rgba(56, 189, 248, 0.35);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ========== HEADER ========== */
        .header-wrapper {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 13, 26, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all 0.3s ease;
        }

        .header-wrapper.scrolled {
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
            border-bottom-color: rgba(255, 255, 255, 0.1);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0.75rem 1.5rem;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--accent-gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
            flex-shrink: 0;
        }
        .brand-icon svg {
            width: 20px;
            height: 20px;
            fill: #fff;
        }
        .brand-badge {
            font-size: 0.6rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.12);
            padding: 0.15rem 0.5rem;
            border-radius: var(--radius-full);
            border: 1px solid rgba(56, 189, 248, 0.25);
            margin-left: 0.2rem;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        .btn-download-header {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent-gradient);
            color: #fff;
            font-weight: 700;
            font-size: 0.88rem;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-full);
            box-shadow: 0 4px 20px rgba(56, 189, 248, 0.35);
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn-download-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(167, 139, 250, 0.5);
        }
        .btn-download-header svg {
            width: 16px;
            height: 16px;
            stroke: #fff;
            fill: none;
            stroke-width: 2.5;
        }

        .header-nav-row {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            background: rgba(8, 13, 26, 0.6);
        }
        .header-nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.25rem;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .header-nav-inner::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.6rem 0.8rem;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            border-radius: var(--radius-sm);
            transition: all 0.2s ease;
            position: relative;
            flex-shrink: 0;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0.15rem;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--accent-gradient);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-link:hover,
        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 60%;
        }
        .nav-link .nav-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--accent-cyan);
            opacity: 0;
            transition: opacity 0.2s ease;
            flex-shrink: 0;
        }
        .nav-link:hover .nav-dot,
        .nav-link.active .nav-dot {
            opacity: 1;
        }

        /* ========== CONTAINER ========== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ========== DOWNLOAD HEADER ========== */
        .download-header {
            text-align: center;
            padding: 4rem 0 3rem;
        }
        .download-header h1 {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: -0.025em;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .download-header .gradient-text {
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .download-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ========== DOWNLOAD GRID ========== */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            margin-bottom: 4rem;
        }

        .download-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            padding: 2.2rem;
            display: flex;
            flex-direction: column;
            position: relative;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .download-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-5px);
            border-color: var(--glass-border-strong);
            box-shadow: var(--shadow-lg);
        }
        .download-card.highlight-card {
            border: 1.5px solid transparent;
            background-image: linear-gradient(rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.85)), var(--accent-gradient);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            box-shadow: 0 20px 50px -10px rgba(56, 189, 248, 0.35), 0 0 30px rgba(167, 139, 250, 0.2);
        }

        .platform-title-row {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.2rem;
        }
        .platform-icon-box {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--glass-border);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .platform-icon-box svg {
            width: 26px;
            height: 26px;
            fill: var(--accent-cyan);
        }
        .platform-title-row h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .info-tags-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0.75rem;
            margin: 1rem 0 1.5rem;
            background: rgba(0, 0, 0, 0.25);
            border: 1px solid rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: var(--radius-md);
        }
        .info-tag-item {
            display: flex;
            flex-direction: column;
        }
        .info-tag-label {
            font-size: 0.72rem;
            color: var(--text-dim);
            text-transform: uppercase;
            letter-spacing: 0.03em;
            margin-bottom: 0.15rem;
        }
        .info-tag-value {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
        }

        .btn-download {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.6rem;
            padding: 1.1rem;
            border-radius: var(--radius-md);
            font-weight: 800;
            font-size: 1rem;
            color: #fff;
            background: var(--accent-gradient);
            box-shadow: 0 8px 25px rgba(56, 189, 248, 0.35);
            transition: all 0.25s ease;
            margin-bottom: 1.5rem;
        }
        .btn-download:hover {
            transform: scale(1.02);
            box-shadow: 0 12px 30px rgba(168, 85, 247, 0.5);
        }
        .btn-download svg {
            width: 20px;
            height: 20px;
        }
        .btn-download.btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--glass-border-strong);
            box-shadow: none;
        }
        .btn-download.btn-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow-cyan);
        }

        .features-list {
            list-style: none;
            margin-top: auto;
        }
        .features-list li {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .features-list li::before {
            content: "✦";
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        /* ========== CREATIVE SECTIONS ========== */
        .section {
            padding: 3rem 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .section-head .section-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid rgba(56, 189, 248, 0.2);
            padding: 0.25rem 0.8rem;
            border-radius: var(--radius-full);
            margin-bottom: 0.9rem;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.025em;
            margin-bottom: 0.7rem;
            color: #fff;
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 安全验证流程 */
        .verification-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .verify-step {
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-align: center;
            position: relative;
        }
        .verify-step .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--accent-gradient);
            color: #fff;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.8rem;
            font-size: 1.1rem;
        }
        .verify-step h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .verify-step p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 全平台特性对比 */
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
            background: rgba(255, 255, 255, 0.02);
            margin-bottom: 2rem;
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }
        .compare-table th,
        .compare-table td {
            padding: 1rem 1.5rem;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.88rem;
        }
        .compare-table th {
            background: rgba(255, 255, 255, 0.03);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .compare-table td {
            color: var(--text-muted);
        }
        .compare-table .check {
            color: var(--accent-teal);
            font-weight: 700;
        }
        .compare-table .platform-name {
            color: #fff;
            font-weight: 600;
        }

        /* 自动更新 */
        .auto-update-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .update-feature-card {
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            transition: all 0.25s ease;
        }
        .update-feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--glass-border-strong);
            transform: translateY(-4px);
        }
        .update-feature-card .icon {
            font-size: 1.8rem;
            margin-bottom: 0.8rem;
        }
        .update-feature-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .update-feature-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 评分与反馈 */
        .ratings-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .rating-card {
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-align: center;
        }
        .rating-stars {
            color: var(--accent-amber);
            font-size: 1.4rem;
            letter-spacing: 2px;
            margin-bottom: 0.5rem;
        }
        .rating-value {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
        }
        .rating-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.3rem;
        }

        /* 下载常见问题 */
        .mini-faq {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }
        .mini-faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 1rem 1.5rem;
        }
        .mini-faq-item .q {
            font-weight: 700;
            color: #fff;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .mini-faq-item .q .q-icon {
            color: var(--accent-cyan);
            font-size: 1.1rem;
        }
        .mini-faq-item .a {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 0.4rem;
            line-height: 1.6;
        }

        /* 私有部署快速入口 */
        .deploy-banner {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(167, 139, 250, 0.06));
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-xl);
            padding: 2.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1.5rem;
        }
        .deploy-banner h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .deploy-banner p {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 500px;
        }
        .btn-deploy {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--glass-border-strong);
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            color: #fff;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .btn-deploy:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow-cyan);
        }

        /* SEO 文章 —— 已修正居中 */
       .seo-article-section {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 3rem;
  margin: 3rem auto;   /* 将原来的 margin: 3rem 0 改为 margin: 3rem auto，实现水平居中 */
  text-align: left;    /* 保持内容左对齐，不设置 text-align: center */
}
        .seo-article-section h2 {
            font-size: 1.8rem;
            color: #fff;
            margin-bottom: 1.25rem;
            font-weight: 800;
            text-align: center;
        }
        .seo-article-section h3 {
            font-size: 1.2rem;
            color: var(--accent-cyan);
            margin: 1.5rem 0 0.5rem;
            font-weight: 700;
        }
        .seo-article-section p {
                      color: var(--text-muted);
            margin-bottom: 1rem;
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .seo-keywords-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 2rem;
            justify-content: center;
        }
        .keyword-chip {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            padding: 0.35rem 0.85rem;
            border-radius: var(--radius-full);
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ========== FOOTER ========== */
        footer {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            background: rgba(8, 13, 26, 0.9);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 0.75rem;
            max-width: 340px;
        }
        .footer-col h5 {
            font-size: 0.88rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.03em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 0.5rem;
        }
        .footer-col a {
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.78rem;
            color: var(--text-dim);
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .footer-bottom-links {
            display: flex;
            gap: 1.25rem;
        }
        .footer-bottom-links a {
            font-size: 0.78rem;
            color: var(--text-dim);
        }
        .footer-bottom-links a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1100px) {
            .download-grid {
                grid-template-columns: 1fr;
            }
            .verification-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .auto-update-grid,
            .ratings-grid {
                grid-template-columns: 1fr;
            }
            .mini-faq {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .download-header h1 {
                font-size: 2.2rem;
            }
            .header-top {
                flex-direction: column;
                gap: 0.5rem;
                padding: 0.75rem 1rem;
            }
            .header-actions {
                width: 100%;
                justify-content: center;
            }
            .header-nav-inner {
                padding: 0 0.75rem;
            }
            .nav-link {
                font-size: 0.75rem;
                padding: 0.5rem 0.6rem;
            }
            .verification-steps {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-head h2 {
                font-size: 1.7rem;
            }
            .deploy-banner {
                flex-direction: column;
                text-align: center;
            }
            .seo-article-section {
                padding: 1.5rem;
            }
            .seo-article-section p {
                text-align: left;
                max-width: 100%;
            }
        }

        @media (max-width: 480px) {
            .download-header h1 {
                font-size: 1.8rem;
            }
            .download-card {
                padding: 1.5rem;
            }
            .info-tags-container {
                grid-template-columns: 1fr;
            }
            .btn-download {
                font-size: 0.95rem;
                padding: 0.9rem;
            }
            .section-head h2 {
                font-size: 1.5rem;
            }
        }s