:root {
            --bg: #f5f6f8;
            --surface: #ffffff;
            --surface-alt: #f9fafb;
            --border: #e5e7eb;
            --border-hover: #cbd5e1;
            --text: #1e293b;
            --text2: #64748b;
            --text3: #94a3b8;
            --accent: #3b82f6;
            --accent-light: #60a5fa;
            --accent-soft: #eff6ff;
            --accent-glow: #93bbfd;
            --green: #10b981;
            --green-soft: #ecfdf5;
            --orange: #f59e0b;
            --radius: 14px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.03);
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1080px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ==================== 导航栏 · 清爽毛玻璃 ==================== */
        .navbar {
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            padding: 10px 0;
        }
        .logo {
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text);
            letter-spacing: -0.4px;
            white-space: nowrap;
        }
        .logo .dot {
            color: var(--accent);
            font-weight: 800;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: var(--text2);
            text-decoration: none;
            padding: 7px 13px;
            border-radius: 20px;
            font-size: 0.88rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
            letter-spacing: -0.1px;
        }
        .nav-links a:hover {
            color: var(--accent);
            background: var(--accent-soft);
        }
        .nav-links a.active {
            color: var(--accent);
            background: var(--accent-soft);
            font-weight: 600;
        }
        .nav-links a.nav-cta {
            background: var(--accent);
            color: #fff;
            border-radius: 20px;
            padding: 8px 18px;
            font-weight: 600;
            margin-left: 4px;
            box-shadow: 0 2px 12px rgba(59, 130, 246, 0.25);
            transition: var(--transition);
        }
        .nav-links a.nav-cta:hover {
            background: #2563eb;
            box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
            transform: translateY(-1px);
            color: #fff;
        }
        .nav-flow-sep {
            color: var(--text3);
            font-size: 0.65rem;
            margin: 0 1px;
            user-select: none;
            pointer-events: none;
        }
        @media (max-width: 768px) {
            .nav-flow-sep {
                display: none;
            }
            .nav-links a {
                padding: 6px 10px;
                font-size: 0.78rem;
                border-radius: 16px;
            }
            .nav-links a.nav-cta {
                padding: 7px 14px;
                margin-left: 0;
            }
            .logo {
                font-size: 1.1rem;
            }
        }

        /* ==================== Hero · 清新白卡 ==================== */
        .hero {
            padding: 40px 0 28px;
        }
        .hero-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 40px 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }
        .hero-card::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-left {
            flex: 1 1 320px;
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-block;
            background: var(--green-soft);
            color: #059669;
            font-size: 0.8rem;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            font-weight: 500;
            letter-spacing: 0.2px;
            border: 1px solid rgba(16, 185, 129, 0.15);
        }
        .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--green);
            border-radius: 50%;
            margin-right: 5px;
            animation: pulse-dot 2s infinite;
            vertical-align: middle;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
            }
        }
        .hero-left h1 {
            font-size: 2.3rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin: 0 0 12px;
            letter-spacing: -0.5px;
        }
        .hero-left h1 .hl {
            color: var(--accent);
            position: relative;
        }
        .hero-desc {
            color: var(--text2);
            font-size: 0.98rem;
            line-height: 1.6;
            margin: 0 0 22px;
            max-width: 520px;
        }
        .hero-btns {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-block;
            padding: 13px 26px;
            border-radius: 28px;
            font-weight: 600;
            text-decoration: none;
            font-size: 0.93rem;
            transition: var(--transition);
            letter-spacing: -0.1px;
            cursor: pointer;
            border: none;
            text-align: center;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.25);
        }
        .btn-primary:hover {
            background: #2563eb;
            box-shadow: 0 6px 24px rgba(59, 130, 246, 0.35);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border: 1.5px solid var(--border);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            background: var(--accent-soft);
        }
        .hero-right {
            flex: 0 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            position: relative;
            z-index: 1;
        }
        .stat-micro {
            background: var(--surface-alt);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 16px 18px;
            text-align: center;
            min-width: 80px;
            box-shadow: var(--shadow-sm);
        }
        .sv {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
        }
        .sl {
            font-size: 0.7rem;
            color: var(--text2);
            text-transform: uppercase;
            letter-spacing: 0.6px;
            margin-top: 2px;
        }
        @media (max-width: 600px) {
            .hero-card {
                padding: 24px 16px;
                border-radius: 16px;
            }
            .hero-left h1 {
                font-size: 1.55rem;
            }
            .hero-right {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-micro {
                padding: 10px 12px;
            }
            .sv {
                font-size: 1.15rem;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.85rem;
            }
        }

        /* ==================== 通用区块 ==================== */
        .section {
            padding: 26px 0;
        }
        .section-title {
            text-align: center;
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.4px;
            margin: 0 0 6px;
        }
        .section-sub {
            text-align: center;
            color: var(--text2);
            font-size: 0.88rem;
            margin: 0 0 28px;
            letter-spacing: -0.1px;
        }

        /* ==================== 六大功能卡片网格 ==================== */
        .grid-6 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 16px;
        }
        .feat-card-link {
            text-decoration: none;
            color: inherit;
            display: block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 20px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }
        .feat-card-link:hover {
            border-color: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .feat-card-link .feat-icon {
            font-size: 2rem;
            margin-bottom: 10px;
            display: block;
        }
        .feat-card-link h3 {
            font-size: 1.08rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 6px;
            letter-spacing: -0.2px;
        }
        .feat-card-link p {
            font-size: 0.84rem;
            color: var(--text2);
            line-height: 1.55;
            margin: 0;
        }
        .feat-card-link .card-arrow {
            display: inline-block;
            margin-top: 10px;
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .feat-card-link:hover .card-arrow {
            transform: translateX(4px);
            color: #2563eb;
        }

        /* ==================== 三步引导 ==================== */
        .steps-row {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .step-card {
            flex: 1 1 200px;
            max-width: 280px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .step-card:hover {
            border-color: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-num {
            display: inline-block;
            width: 38px;
            height: 38px;
            line-height: 38px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 12px;
        }
        .step-card h4 {
            color: var(--text);
            font-size: 1rem;
            margin: 0 0 4px;
            letter-spacing: -0.2px;
        }
        .step-card small {
            color: var(--text2);
            font-size: 0.78rem;
        }

        /* ==================== 更新摘要 ==================== */
        .update-feed {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 22px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }
        .update-feed .update-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            font-size: 0.88rem;
            flex: 1 1 260px;
        }
        .update-dot {
            width: 7px;
            height: 7px;
            background: var(--orange);
            border-radius: 50%;
            flex-shrink: 0;
            animation: pulse-dot 2s infinite;
        }
        .update-date {
            color: var(--text3);
            font-size: 0.73rem;
            white-space: nowrap;
            margin-left: auto;
            padding-left: 8px;
        }

        /* ==================== FAQ摘要 ==================== */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 18px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            cursor: default;
        }
        .faq-item:hover {
            border-color: var(--border-hover);
        }
        .faq-item .q {
            font-weight: 600;
            color: var(--text);
            font-size: 0.9rem;
            margin-bottom: 4px;
            letter-spacing: -0.1px;
        }
        .faq-item .a {
            color: var(--text2);
            font-size: 0.8rem;
            line-height: 1.5;
        }

        /* ==================== CTA暗色板块 → 改为清爽蓝白 ==================== */
        .cta-dark {
            background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
            border: 1px solid #bfdbfe;
            border-radius: 20px;
            padding: 36px 28px;
            text-align: center;
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }
        .cta-dark h2 {
            color: var(--text);
            font-size: 1.45rem;
            margin: 0 0 8px;
            letter-spacing: -0.3px;
        }
        .cta-dark p {
            color: var(--text2);
            margin: 0 0 20px;
            font-size: 0.9rem;
        }
        .cta-dark .btn-primary {
            box-shadow: 0 4px 18px rgba(59, 130, 246, 0.3);
        }

        /* ==================== 下载控制台板块 ==================== */
        .download-console {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 28px 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            justify-content: space-between;
            margin: 8px 0 20px;
            box-shadow: var(--shadow-sm);
        }
        .dl-info h2 {
            color: var(--text);
            font-size: 1.25rem;
            margin: 0 0 6px;
            letter-spacing: -0.2px;
        }
        .dl-info p {
            color: var(--text2);
            font-size: 0.84rem;
            margin: 0 0 14px;
        }
        .dl-btns {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .platform-btn {
            display: inline-block;
            padding: 11px 22px;
            border-radius: 24px;
            font-weight: 600;
            text-decoration: none;
            font-size: 0.87rem;
            transition: var(--transition);
            letter-spacing: -0.1px;
        }
        .win-btn {
            background: #3b82f6;
            color: #fff;
        }
        .win-btn:hover {
            background: #2563eb;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
        }
        .and-btn {
            background: #10b981;
            color: #fff;
        }
        .and-btn:hover {
            background: #059669;
            box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35);
        }
        .dl-badge {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }
        .badge-item {
            background: var(--surface-alt);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 0.74rem;
            color: var(--text2);
            white-space: nowrap;
        }

        /* ==================== Footer ==================== */
        .footer {
            border-top: 1px solid var(--border);
            padding: 22px 16px;
            text-align: center;
            background: var(--surface);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text2);
            text-decoration: none;
            font-size: 0.8rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .copyright {
            color: var(--text3);
            font-size: 0.7rem;
        }

        /* ==================== 场景卡片 ==================== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 12px;
        }
        .scene-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 18px 16px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .scene-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-2px);
        }
        .scene-icon {
            font-size: 1.8rem;
            margin-bottom: 6px;
        }
        .scene-card h4 {
            color: var(--text);
            font-size: 0.93rem;
            margin: 0 0 3px;
            letter-spacing: -0.1px;
        }
        .scene-card small {
            color: var(--text2);
            font-size: 0.74rem;
        }

        /* ==================== 评价卡片 ==================== */
        .testi-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
            gap: 14px;
        }
        .testi-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 18px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .testi-card:hover {
            border-color: var(--border-hover);
        }
        .stars {
            color: #f59e0b;
            font-size: 0.84rem;
            margin-bottom: 6px;
            letter-spacing: 1px;
        }
        .testi-text {
            color: var(--text);
            font-size: 0.84rem;
            line-height: 1.5;
            margin: 0 0 6px;
            font-style: italic;
        }
        .testi-author {
            color: var(--text2);
            font-size: 0.72rem;
        }

        /* ==================== 响应式微调 ==================== */
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .section {
                padding: 18px 0;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .hero {
                padding: 20px 0 16px;
            }
            .hero-card {
                padding: 20px 14px;
            }
            .grid-6 {
                grid-template-columns: 1fr;
            }
        }