:root {
            --bg-deep: #060b15;
            --bg-dark: #080c14;
            --panel-bg: #0f172a;
            --panel-hover: #1a2540;
            --accent-emerald: #10b981;
            --accent-cyan: #06b6d4;
            --accent-purple: #8b5cf6;
            --accent-amber: #f59e0b;
            --accent-rose: #f43f5e;
            --accent-glow-emerald: rgba(16, 185, 129, 0.18);
            --accent-glow-cyan: rgba(6, 182, 212, 0.14);
            --accent-glow-purple: rgba(139, 92, 246, 0.16);
            --accent-glow-amber: rgba(245, 158, 11, 0.18);
            --border-color: rgba(255, 255, 255, 0.07);
            --border-highlight: rgba(16, 185, 129, 0.45);
            --border-soft: rgba(255, 255, 255, 0.04);
            --text-primary: #f8fafc;
            --text-secondary: #b0bec5;
            --text-muted: #64748b;
            --text-soft: #8899aa;
            --card-shadow: 0 8px 40px rgba(0, 0, 0, 0.45);
            --card-shadow-hover: 0 18px 55px rgba(0, 0, 0, 0.6);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-mono: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', 'Fira Code', monospace;
            --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            background-color: var(--bg-deep);
            background-image:
                radial-gradient(ellipse at 25% 8%, rgba(16, 185, 129, 0.025) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 25%, rgba(6, 182, 212, 0.025) 0%, transparent 50%),
                radial-gradient(ellipse at 35% 65%, rgba(139, 92, 246, 0.02) 0%, transparent 50%);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            font-family: var(--font-sans);
            letter-spacing: 0.01em;
        }

        /* ===== 通知栏 ===== */
        .notice-bar {
            background: linear-gradient(105deg, #065f46 0%, #0e7490 50%, #5b21b6 100%);
            background-size: 200% 100%;
            animation: noticeShimmer 8s ease-in-out infinite;
            color: #ecfdf5;
            font-size: 0.84rem;
            font-weight: 600;
            text-align: center;
            padding: 0.55rem 1rem;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.6rem;
            letter-spacing: 0.3px;
            position: relative;
            z-index: 1001;
        }
        @keyframes noticeShimmer {
            0%,
            100% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
        }
        .notice-tag {
            background: rgba(255, 255, 255, 0.22);
            padding: 0.18rem 0.6rem;
            border-radius: 5px;
            font-size: 0.73rem;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            backdrop-filter: blur(4px);
        }
        .notice-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #34d399;
            box-shadow: 0 0 12px #34d399;
            animation: pulseDot 2s ease-in-out infinite;
        }
        @keyframes pulseDot {
            0%,
            100% {
                box-shadow: 0 0 8px #34d399;
            }
            50% {
                box-shadow: 0 0 22px #34d399, 0 0 40px rgba(52, 211, 153, 0.5);
            }
        }

        /* ===== 头部导航 ===== */
        header {
            position: sticky;
            top: 0;
            background: rgba(6, 11, 21, 0.88);
            backdrop-filter: blur(22px) saturate(140%);
            -webkit-backdrop-filter: blur(22px) saturate(140%);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: all var(--transition-smooth);
        }
        header.scrolled {
            background: rgba(6, 11, 21, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .nav-inner {
            max-width: 1320px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.9rem 2rem;
            gap: 1.5rem;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            flex-shrink: 0;
            transition: transform var(--transition-bounce);
        }
        .brand-logo:hover {
            transform: scale(1.03);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-emerald) 0%, var(--accent-cyan) 60%, var(--accent-purple) 100%);
            border-radius: 10px;
            display: grid;
            place-items: center;
            box-shadow: 0 0 20px var(--accent-glow-emerald);
            position: relative;
            overflow: hidden;
        }
        .logo-icon::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.2) 50%, transparent 60%);
            animation: logoGlint 3s ease-in-out infinite;
        }
        @keyframes logoGlint {
            0%,
            100% {
                opacity: 0;
            }
            50% {
                opacity: 1;
            }
        }
        .logo-icon svg {
            width: 23px;
            height: 23px;
            fill: #060b15;
            position: relative;
            z-index: 1;
        }
        .brand-name {
            font-size: 1.35rem;
            font-weight: 850;
            letter-spacing: -0.6px;
            color: var(--text-primary);
        }
        .brand-version {
            font-size: 0.68rem;
            background: rgba(139, 92, 246, 0.18);
            color: #a78bfa;
            padding: 0.15rem 0.5rem;
            border-radius: 5px;
            border: 1px solid rgba(139, 92, 246, 0.35);
            font-weight: 700;
            letter-spacing: 0.4px;
        }
        .nav-links {
            display: flex;
            gap: 2.2rem;
            list-style: none;
            align-items: center;
        }
        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.93rem;
            font-weight: 530;
            transition: all var(--transition-smooth);
            position: relative;
            padding: 0.25rem 0;
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-emerald), var(--accent-cyan));
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #e2fdf2;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-shrink: 0;
        }
        .btn-nav {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-size: 0.86rem;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .btn-nav:hover {
            border-color: var(--accent-purple);
            color: #c4b5fd;
            background: rgba(139, 92, 246, 0.08);
            box-shadow: 0 0 24px rgba(139, 92, 246, 0.2);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* ===== Hero 下载头部 ===== */
        .download-hero {
            padding: 5rem 0 3.5rem;
            text-align: center;
            position: relative;
        }
        .download-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            left: 50%;
            transform: translateX(-50%);
            width: 650px;
            height: 650px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
            z-index: -1;
        }
        .download-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            background: rgba(16, 185, 129, 0.09);
            border: 1px solid rgba(16, 185, 129, 0.22);
            color: var(--accent-emerald);
            padding: 0.4rem 1rem;
            border-radius: 22px;
            font-size: 0.84rem;
            font-weight: 650;
            margin-bottom: 1.6rem;
            letter-spacing: 0.3px;
            animation: fadeInUp 0.7s ease-out;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(18px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .download-hero .hero-badge svg {
            animation: spinSlow 10s linear infinite;
        }
        @keyframes spinSlow {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }
        .download-hero h1 {
            font-size: 3.4rem;
            font-weight: 900;
            letter-spacing: -1.6px;
            margin-bottom: 1rem;
            animation: fadeInUp 0.7s ease-out 0.1s both;
            line-height: 1.15;
        }
        .download-hero h1 span {
            background: linear-gradient(135deg, var(--accent-emerald) 0%, var(--accent-cyan) 45%, var(--accent-purple) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .download-hero>p {
            color: var(--text-secondary);
            font-size: 1.12rem;
            max-width: 620px;
            margin: 0 auto 1.8rem;
            animation: fadeInUp 0.7s ease-out 0.2s both;
            line-height: 1.7;
        }
        .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            flex-wrap: wrap;
            animation: fadeInUp 0.7s ease-out 0.3s both;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.2rem;
        }
        .hero-stat-item .stat-num {
            font-size: 1.5rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-stat-item .stat-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.2px;
        }

        /* ===== 分隔线 ===== */
        .section-divider {
            border: 0;
            height: 1px;
            background: var(--border-color);
            margin: 0;
            position: relative;
        }
        .section-divider::after {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-emerald), transparent);
            border-radius: 2px;
        }

        /* ===== 下载卡片网格 ===== */
        .download-grid-section {
            padding: 4rem 0 2rem;
        }
        .download-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.4rem;
        }
        .download-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2.2rem 1.5rem 1.8rem;
            text-align: center;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            color: var(--text-primary);
            position: relative;
            overflow: hidden;
            cursor: pointer;
        }
        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-emerald), transparent);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .download-card:hover::before {
            opacity: 1;
        }
        .download-card:hover {
            border-color: var(--border-highlight);
            transform: translateY(-6px);
            box-shadow: var(--card-shadow-hover);
            background: var(--panel-hover);
        }
        .download-card .platform-icon {
            width: 66px;
            height: 66px;
            border-radius: 14px;
            background: rgba(16, 185, 129, 0.08);
            display: grid;
            place-items: center;
            margin-bottom: 1.2rem;
            transition: all var(--transition-smooth);
        }
        .download-card:hover .platform-icon {
            background: rgba(16, 185, 129, 0.16);
            box-shadow: 0 0 24px var(--accent-glow-emerald);
            transform: scale(1.05);
        }
        .download-card .platform-icon svg {
            width: 36px;
            height: 36px;
            fill: var(--accent-emerald);
        }
        .download-card:nth-child(2) .platform-icon {
            background: rgba(6, 182, 212, 0.08);
        }
        .download-card:nth-child(2) .platform-icon svg {
            fill: var(--accent-cyan);
        }
        .download-card:nth-child(2):hover .platform-icon {
            background: rgba(6, 182, 212, 0.16);
            box-shadow: 0 0 24px var(--accent-glow-cyan);
        }
        .download-card:nth-child(3) .platform-icon {
            background: rgba(139, 92, 246, 0.08);
        }
        .download-card:nth-child(3) .platform-icon svg {
            fill: #a78bfa;
        }
        .download-card:nth-child(3):hover .platform-icon {
            background: rgba(139, 92, 246, 0.16);
            box-shadow: 0 0 24px var(--accent-glow-purple);
        }
        .download-card:nth-child(4) .platform-icon {
            background: rgba(245, 158, 11, 0.08);
        }
        .download-card:nth-child(4) .platform-icon svg {
            fill: var(--accent-amber);
        }
        .download-card:nth-child(4):hover .platform-icon {
            background: rgba(245, 158, 11, 0.16);
            box-shadow: 0 0 24px var(--accent-glow-amber);
        }
        .download-card h3 {
            font-size: 1.22rem;
            font-weight: 750;
            margin-bottom: 0.3rem;
            letter-spacing: -0.3px;
        }
        .download-card .platform-desc {
            color: var(--text-muted);
            font-size: 0.83rem;
            margin-bottom: 0.7rem;
        }
        .download-card .badge-version {
            font-size: 0.68rem;
            background: rgba(16, 185, 129, 0.12);
            color: var(--accent-emerald);
            padding: 0.18rem 0.65rem;
            border-radius: 5px;
            border: 1px solid rgba(16, 185, 129, 0.2);
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .download-card .btn-download {
            margin-top: 1.2rem;
            background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
            color: #060b15;
            padding: 0.65rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 750;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all var(--transition-bounce);
            display: inline-block;
            letter-spacing: 0.3px;
            box-shadow: 0 3px 16px rgba(16, 185, 129, 0.2);
        }
        .download-card .btn-download:hover {
            transform: scale(1.04);
            box-shadow: 0 6px 24px rgba(16, 185, 129, 0.35);
        }
        .download-card .btn-download.outline {
            background: transparent;
            border: 1.5px solid rgba(245, 158, 11, 0.5);
            color: #fcd34d;
            box-shadow: none;
        }
        .download-card .btn-download.outline:hover {
            background: rgba(245, 158, 11, 0.1);
            border-color: var(--accent-amber);
            box-shadow: 0 0 22px rgba(245, 158, 11, 0.25);
        }
        .os-badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            justify-content: center;
            margin-top: 0.5rem;
        }
        .os-badge-row span {
            background: rgba(255, 255, 255, 0.035);
            padding: 0.12rem 0.6rem;
            border-radius: 4px;
            font-size: 0.64rem;
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            letter-spacing: 0.2px;
        }

        /* ===== 创意版块：安装流程 ===== */
        .install-guide-section {
            padding: 5rem 0;
            position: relative;
            background: rgba(15, 23, 42, 0.3);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }
        .install-guide-section::before {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -120px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.04) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 3.5rem;
            position: relative;
            z-index: 1;
        }
        .section-tag {
            color: var(--accent-emerald);
            font-size: 0.83rem;
            font-weight: 750;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            margin-bottom: 0.8rem;
            display: block;
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 850;
            letter-spacing: -1px;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .section-title .highlight {
            background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.65;
        }
        .install-steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            position: relative;
            z-index: 1;
        }
        .install-step-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem 1.6rem;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .install-step-card:hover {
            border-color: var(--border-highlight);
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .install-step-card .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: grid;
            place-items: center;
            margin: 0 auto 1.2rem;
            font-weight: 850;
            font-size: 1.1rem;
            letter-spacing: -0.3px;
        }
        .install-step-card:nth-child(1) .step-number {
            background: rgba(16, 185, 129, 0.15);
            color: var(--accent-emerald);
        }
        .install-step-card:nth-child(2) .step-number {
            background: rgba(6, 182, 212, 0.15);
            color: var(--accent-cyan);
        }
        .install-step-card:nth-child(3) .step-number {
            background: rgba(139, 92, 246, 0.15);
            color: #a78bfa;
        }
        .install-step-card h4 {
            font-size: 1.08rem;
            font-weight: 750;
            margin-bottom: 0.6rem;
            letter-spacing: -0.2px;
        }
        .install-step-card p {
            color: var(--text-secondary);
            font-size: 0.86rem;
            line-height: 1.6;
        }
        .install-step-card .step-icon-inline {
            margin-top: 0.8rem;
            font-size: 1.8rem;
            opacity: 0.7;
        }

        /* ===== 创意版块：系统需求对比 ===== */
        .sysreq-section {
            padding: 5rem 0;
            position: relative;
        }
        .sysreq-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }
        .sysreq-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.6rem 1.4rem;
            transition: all var(--transition-smooth);
        }
        .sysreq-card:hover {
            border-color: var(--border-highlight);
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }
        .sysreq-card .sysreq-os {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent-cyan);
            font-weight: 700;
            margin-bottom: 0.8rem;
            display: block;
        }
        .sysreq-card h4 {
            font-size: 1rem;
            font-weight: 750;
            margin-bottom: 0.8rem;
            letter-spacing: -0.3px;
        }
        .sysreq-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.45rem;
        }
        .sysreq-card ul li {
            font-size: 0.8rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .sysreq-card ul li::before {
            content: '•';
            color: var(--accent-emerald);
            font-weight: bold;
            flex-shrink: 0;
        }

        /* ===== 创意版块：校验与安全 ===== */
        .verify-section {
            padding: 5rem 0;
            background: rgba(15, 23, 42, 0.3);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
            text-align: center;
        }
        .verify-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin-top: 2.5rem;
        }
        .verify-card {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            transition: all var(--transition-smooth);
        }
        .verify-card:hover {
            border-color: var(--border-highlight);
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .verify-card .verify-icon-large {
            font-size: 2.6rem;
            margin-bottom: 1rem;
            display: block;
        }
        .verify-card h4 {
            font-size: 1.05rem;
            font-weight: 750;
            margin-bottom: 0.5rem;
        }
        .verify-card p {
            color: var(--text-secondary);
            font-size: 0.84rem;
            line-height: 1.6;
        }
        .verify-card .hash-code {
            display: block;
            font-family: var(--font-mono);
            font-size: 0.7rem;
            color: var(--accent-cyan);
            background: rgba(6, 182, 212, 0.06);
            padding: 0.4rem 0.6rem;
            border-radius: 4px;
            margin-top: 0.7rem;
            word-break: break-all;
            border: 1px dashed rgba(6, 182, 212, 0.25);
        }

        /* ===== 创意版块：快速上手预览 ===== */
        .quickstart-section {
            padding: 5rem 0;
            position: relative;
        }
        .quickstart-visual {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .quickstart-mock {
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .quickstart-mock .mock-header {
            background: rgba(255, 255, 255, 0.025);
            padding: 0.75rem 1.2rem;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .quickstart-mock .mock-body {
            padding: 1.4rem;
            font-family: var(--font-mono);
            font-size: 0.8rem;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            color: var(--text-secondary);
        }
        .quickstart-mock .mock-body .cmd-line {
            color: #d1fae5;
        }
        .quickstart-mock .mock-body .cmd-line .prompt {
            color: var(--accent-emerald);
        }
        .quickstart-info h3 {
            font-size: 2rem;
            font-weight: 850;
            letter-spacing: -0.8px;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .quickstart-info h3 .highlight {
            background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .quickstart-info p {
            color: var(--text-secondary);
            margin-bottom: 1.4rem;
            line-height: 1.7;
        }
        .quickstart-info .btn-primary {
            background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
            color: #060b15;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 750;
            font-size: 0.95rem;
            text-decoration: none;
            box-shadow: 0 4px 20px var(--accent-glow-emerald);
            transition: all var(--transition-bounce);
            display: inline-block;
            letter-spacing: 0.3px;
        }
        .quickstart-info .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(16, 185, 129, 0.35);
        }

        /* ===== CTA 横幅 ===== */
        .cta-banner {
            padding: 3rem 0 5rem;
            text-align: center;
        }
        .cta-card {
            background: linear-gradient(145deg, rgba(15, 23, 42, 0.9) 0%, rgba(139, 92, 246, 0.07) 50%, rgba(6, 182, 212, 0.05) 100%);
            border: 1px solid var(--border-highlight);
            border-radius: var(--radius-xl);
            padding: 4rem 2.5rem;
            max-width: 960px;
            margin: 0 auto;
            box-shadow: 0 0 55px var(--accent-glow-emerald);
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -70px;
            right: -70px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: 2.4rem;
            font-weight: 850;
            margin-bottom: 1rem;
            letter-spacing: -0.8px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 2.2rem;
            position: relative;
            z-index: 1;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-card .btn-primary {
            position: relative;
            z-index: 1;
            background: linear-gradient(135deg, var(--accent-emerald), var(--accent-cyan));
            color: #060b15;
            padding: 0.95rem 2.4rem;
            border-radius: var(--radius-sm);
            font-weight: 750;
            font-size: 1rem;
            text-decoration: none;
            box-shadow: 0 4px 22px var(--accent-glow-emerald);
            transition: all var(--transition-bounce);
            display: inline-block;
            letter-spacing: 0.3px;
        }
        .cta-card .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 35px rgba(16, 185, 129, 0.4);
        }

        /* ===== Footer ===== */
        footer {
            background: #03060d;
            border-top: 1px solid var(--border-color);
            padding: 4.5rem 0 2rem;
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 3.5rem;
            margin-bottom: 3.5rem;
        }
        .footer-brand p {
            margin-top: 1rem;
            max-width: 310px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col h4 {
            color: var(--text-primary);
            font-size: 0.93rem;
            margin-bottom: 1.3rem;
            font-weight: 700;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }
        .footer-col a {
            color: var(--text-muted);
            text-decoration: none;
            transition: all var(--transition-smooth);
            font-size: 0.86rem;
        }
        .footer-col a:hover {
            color: var(--accent-emerald);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 2.2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.75rem;
            color: var(--accent-emerald);
            background: rgba(16, 185, 129, 0.08);
            padding: 0.3rem 0.7rem;
            border-radius: 14px;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1100px) {
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .install-steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .sysreq-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .verify-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .quickstart-visual {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2.5rem;
            }
            .download-hero h1 {
                font-size: 2.6rem;
            }
        }
        @media (max-width: 700px) {
            .nav-links {
                gap: 1rem;
                font-size: 0.78rem;
            }
            .nav-inner {
                padding: 0.7rem 1rem;
                flex-wrap: wrap;
                gap: 0.8rem;
            }
            .download-hero h1 {
                font-size: 2rem;
                letter-spacing: -0.6px;
            }
            .download-hero {
                padding: 3rem 0 2rem;
            }
            .download-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .install-steps-grid {
                grid-template-columns: 1fr;
            }
            .sysreq-grid {
                grid-template-columns: 1fr;
            }
            .verify-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .cta-card {
                padding: 2.5rem 1.5rem;
            }
            .cta-card h2 {
                font-size: 1.7rem;
            }
            .hero-stats-row {
                gap: 1.2rem;
            }
            .quickstart-info h3 {
                font-size: 1.6rem;
            }
            .brand-version {
                display: none;
            }
            .container {
                padding: 0 1rem;
            }
        }
        @media (max-width: 420px) {
            .download-grid {
                grid-template-columns: 1fr;
            }
            .download-hero h1 {
                font-size: 1.6rem;
            }
            .hero-stats-row {
                gap: 0.8rem;
            }
            .hero-stat-item .stat-num {
                font-size: 1.1rem;
            }
            .download-card {
                padding: 1.4rem 1rem;
            }
        }