/* ==================== 全局重置 & 基础 ==================== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --bg-deep: #0c0a14;
            --bg-surface: #151128;
            --bg-card: #1a1533;
            --bg-card-hover: #221a42;
            --accent: #00e5c7;
            --accent-2: #7c5cff;
            --accent-glow: rgba(0, 229, 199, 0.25);
            --accent-2-glow: rgba(124, 92, 255, 0.25);
            --text-main: #ffffff;
            --text-secondary: #a89fc4;
            --text-tertiary: #6f6790;
            --border-subtle: rgba(124, 92, 255, 0.15);
            --border-glow: rgba(0, 229, 199, 0.3);
            --shadow-soft: 0 8px 40px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 60px rgba(0, 229, 199, 0.08);
            --radius: 14px;
            --radius-lg: 20px;
            --radius-full: 50px;
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --gradient-main: linear-gradient(135deg, #00e5c7 0%, #7c5cff 100%);
            --gradient-card: linear-gradient(160deg, rgba(26, 21, 51, 0.95) 0%, rgba(12, 10, 20, 0.98) 100%);
            --gradient-border: linear-gradient(135deg, rgba(0, 229, 199, 0.4), rgba(124, 92, 255, 0.4));
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font);
            color: var(--text-main);
            background: var(--bg-deep);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ==================== 顶部导航 ==================== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(12, 10, 20, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-main);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #0c0a14;
            font-weight: 900;
            box-shadow: 0 0 24px var(--accent-glow);
        }

        .logo span {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.2px;
            transition: var(--transition);
            position: relative;
            padding: 4px 0;
        }

        .nav a:hover {
            color: var(--text-main);
        }

        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav a:hover::after {
            width: 100%;
        }

        .nav .lang-btn {
            background: rgba(255, 255, 255, 0.06);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            color: var(--text-main);
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            letter-spacing: 0.3px;
        }

        .nav .lang-btn:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--border-glow);
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .nav .lang-btn::after {
            display: none;
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-main);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ==================== Hero 主视觉 ==================== */
        .hero {
            padding: 160px 0 80px;
            background: var(--bg-deep);
            position: relative;
            overflow: hidden;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 25% 60%, rgba(0, 229, 199, 0.07) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 40%, rgba(124, 92, 255, 0.10) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 229, 199, 0.04) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-bg-grid {
            position: absolute;
            inset: 0;
            opacity: 0.04;
            background-image:
                linear-gradient(rgba(0, 229, 199, 0.5) 1px, transparent 1px),
                linear-gradient(90deg, rgba(124, 92, 255, 0.5) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

        .hero-content {
            color: var(--text-main);
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 229, 199, 0.10);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 18px;
            border-radius: var(--radius-full);
            margin-bottom: 22px;
            border: 1px solid rgba(0, 229, 199, 0.22);
            letter-spacing: 0.4px;
            animation: pulse-badge 3s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 229, 199, 0.2);
            }
            50% {
                box-shadow: 0 0 24px 4px rgba(0, 229, 199, 0.1);
            }
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.14;
            margin-bottom: 16px;
            letter-spacing: -1.2px;
        }

        .hero h1 .highlight {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p.sub {
            font-size: 19px;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 34px;
            line-height: 1.75;
            letter-spacing: 0.2px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 40px;
        }

        .btn-primary {
            display: inline-block;
            background: var(--gradient-main);
            color: #0c0a14;
            font-size: 17px;
            font-weight: 700;
            padding: 14px 38px;
            border-radius: var(--radius-full);
            transition: var(--transition);
            box-shadow: 0 4px 28px rgba(0, 229, 199, 0.3);
            letter-spacing: 0.4px;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 40px rgba(0, 229, 199, 0.45);
        }

        .btn-secondary {
            display: inline-block;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-main);
            font-size: 15px;
            font-weight: 500;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            letter-spacing: 0.3px;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--border-glow);
            box-shadow: 0 0 28px var(--accent-glow);
        }

        .hero-trust {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .trust-item {
            display: flex;
            flex-direction: column;
        }

        .trust-item .number {
            font-size: 28px;
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .trust-item .label {
            font-size: 13px;
            color: var(--text-tertiary);
            letter-spacing: 0.3px;
        }

        /* Hero 右侧可视化 */
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .hero-visual-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 229, 199, 0.06) 0%, rgba(124, 92, 255, 0.04) 40%, transparent 70%);
            pointer-events: none;
            animation: glow-pulse 4s ease-in-out infinite;
        }

        @keyframes glow-pulse {
            0%,
            100% {
                transform: scale(1);
                opacity: 0.7;
            }
            50% {
                transform: scale(1.08);
                opacity: 1;
            }
        }

        .hero-ring {
            width: 100%;
            max-width: 420px;
            aspect-ratio: 1/1;
            border-radius: 50%;
            background: radial-gradient(circle at 35% 35%, rgba(0, 229, 199, 0.06), rgba(12, 10, 20, 0.9) 75%);
            border: 1px solid rgba(0, 229, 199, 0.12);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: ring-rotate 30s linear infinite;
        }

        @keyframes ring-rotate {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        .hero-ring-inner {
            width: 78%;
            height: 78%;
            border-radius: 50%;
            background: radial-gradient(circle at 40% 45%, rgba(124, 92, 255, 0.05), transparent 70%);
            border: 1px solid rgba(124, 92, 255, 0.10);
            position: relative;
            animation: ring-rotate-reverse 30s linear infinite;
        }

        @keyframes ring-rotate-reverse {
            from {
                transform: rotate(360deg);
            }
            to {
                transform: rotate(0deg);
            }
        }

        .node-dot {
            position: absolute;
            width: 7px;
            height: 7px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 16px var(--accent-glow);
        }
        .node-dot:nth-child(1) {
            top: 18%;
            left: 32%;
        }
        .node-dot:nth-child(2) {
            top: 58%;
            left: 12%;
        }
        .node-dot:nth-child(3) {
            top: 42%;
            right: 18%;
        }
        .node-dot:nth-child(4) {
            bottom: 22%;
            right: 32%;
        }
        .node-dot:nth-child(5) {
            top: 28%;
            right: 42%;
        }
        .node-dot:nth-child(6) {
            bottom: 38%;
            left: 38%;
        }
        .node-dot:nth-child(7) {
            top: 50%;
            left: 50%;
        }
        .node-dot:nth-child(8) {
            bottom: 15%;
            left: 25%;
        }

        .node-line {
            position: absolute;
            width: 55%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 199, 0.2), transparent);
            top: 48%;
            left: 22%;
            transform: rotate(22deg);
        }
        .node-line:nth-of-type(2) {
            transform: rotate(-32deg);
            top: 28%;
            left: 12%;
            width: 45%;
        }
        .node-line:nth-of-type(3) {
            transform: rotate(68deg);
            top: 55%;
            left: 26%;
            width: 38%;
        }
        .node-line:nth-of-type(4) {
            transform: rotate(-15deg);
            top: 70%;
            left: 30%;
            width: 42%;
        }

        /* ==================== 通用标题 ==================== */
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-title h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.8px;
            line-height: 1.25;
        }

        .section-title h2 .gradient-text {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-title p {
            color: var(--text-secondary);
            font-size: 17px;
            margin-top: 10px;
            letter-spacing: 0.2px;
        }

        /* ==================== 品牌宣言（创意版块1） ==================== */
        .manifesto {
            padding: 90px 0;
            background: var(--bg-surface);
            position: relative;
            overflow: hidden;
        }

        .manifesto::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 0%, rgba(0, 229, 199, 0.05) 0%, transparent 60%);
            pointer-events: none;
        }

        .manifesto-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .manifesto-text h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.6px;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .manifesto-text h2 .gradient-text {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .manifesto-text p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .manifesto-quote {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            position: relative;
            box-shadow: var(--shadow-soft);
        }

        .manifesto-quote::before {
            content: '"';
            position: absolute;
            top: 10px;
            left: 20px;
            font-size: 72px;
            color: var(--accent);
            opacity: 0.15;
            font-family: Georgia, serif;
            line-height: 1;
        }

        .manifesto-quote p {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.7;
            letter-spacing: 0.3px;
            position: relative;
            z-index: 1;
        }

        .manifesto-quote .quote-author {
            margin-top: 16px;
            font-size: 14px;
            color: var(--text-tertiary);
            font-weight: 400;
            letter-spacing: 0.5px;
        }

        /* ==================== 全球节点脉搏（创意版块2） ==================== */
        .pulse {
            padding: 90px 0;
            background: var(--bg-deep);
            position: relative;
        }

        .pulse-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .pulse-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-soft);
        }

        .pulse-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-main);
            opacity: 0;
            transition: var(--transition);
        }

        .pulse-card:hover::before {
            opacity: 1;
        }

        .pulse-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .pulse-icon {
            font-size: 36px;
            margin-bottom: 12px;
            display: block;
        }

        .pulse-card .metric {
            font-size: 32px;
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }

        .pulse-card .metric-label {
            font-size: 14px;
            color: var(--text-tertiary);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        /* ==================== 核心功能 ==================== */
        .features {
            padding: 90px 0;
            background: var(--bg-surface);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 22px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            box-shadow: var(--shadow-soft);
        }

        .feature-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-5px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .feature-icon {
            font-size: 40px;
            margin-bottom: 14px;
            display: block;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
            letter-spacing: -0.3px;
        }

        .feature-card p {
            color: var(--text-tertiary);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ==================== 速度实验室（创意版块3） ==================== */
        .speed-lab {
            padding: 90px 0;
            background: var(--bg-deep);
        }

        .speed-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            max-width: 900px;
            margin: 0 auto;
        }

        .speed-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            box-shadow: var(--shadow-soft);
        }

        .speed-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .speed-card .speed-label {
            font-size: 14px;
            color: var(--text-tertiary);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .speed-card .speed-value {
            font-size: 56px;
            font-weight: 900;
            letter-spacing: -1.5px;
            line-height: 1;
        }

        .speed-card .speed-value.fast {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .speed-card .speed-value.slow {
            color: var(--text-tertiary);
        }

        .speed-card .speed-unit {
            font-size: 16px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        .speed-card .speed-bar {
            height: 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 4px;
            margin-top: 16px;
            overflow: hidden;
        }

        .speed-card .speed-bar-fill {
            height: 100%;
            border-radius: 4px;
            transition: width 1.5s ease;
        }

        .speed-card .speed-bar-fill.fast {
            background: var(--gradient-main);
            width: 96%;
        }

        .speed-card .speed-bar-fill.slow {
            background: rgba(255, 255, 255, 0.15);
            width: 32%;
        }

        /* ==================== 下载专区 ==================== */
        .download {
            padding: 90px 0;
            background: var(--bg-surface);
        }

        .download-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .download-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 22px;
            text-align: center;
            box-shadow: var(--shadow-soft);
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .download-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-main);
            opacity: 0;
            transition: var(--transition);
        }

        .download-card:hover::after {
            opacity: 1;
        }

        .download-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .download-card .icon {
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: rgba(0, 229, 199, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 26px;
            border: 1px solid rgba(0, 229, 199, 0.15);
        }

        .download-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-main);
        }

        .download-card .version {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .download-card .btn-download {
            display: inline-block;
            background: var(--gradient-main);
            color: #0c0a14;
            font-weight: 700;
            padding: 10px 26px;
            border-radius: var(--radius-full);
            font-size: 13px;
            transition: var(--transition);
            letter-spacing: 0.3px;
        }

        .download-card .btn-download:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(0, 229, 199, 0.35);
        }

        .download-note {
            text-align: center;
            margin-top: 36px;
            font-size: 14px;
            color: var(--text-secondary);
            letter-spacing: 0.2px;
        }

        .download-note .warning {
            color: var(--accent);
            font-weight: 600;
        }

        /* ==================== 场景宇宙 ==================== */
        .scenarios {
            padding: 90px 0;
            background: var(--bg-deep);
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 30px 20px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            box-shadow: var(--shadow-soft);
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }

        .scenario-card .emoji {
            font-size: 38px;
            margin-bottom: 12px;
            display: block;
        }

        .scenario-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .scenario-card p {
            color: var(--text-tertiary);
            font-size: 13px;
            line-height: 1.65;
        }

        /* ==================== 用户之声（创意版块4） ==================== */
        .voices {
            padding: 90px 0;
            background: var(--bg-surface);
        }

        .voices-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .voice-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            box-shadow: var(--shadow-soft);
            position: relative;
        }

        .voice-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .voice-card .stars {
            color: var(--accent);
            font-size: 16px;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .voice-card .quote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            font-style: italic;
        }

        .voice-card .author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .voice-card .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
            color: #0c0a14;
        }

        .voice-card .author-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
        }

        .voice-card .author-role {
            font-size: 12px;
            color: var(--text-tertiary);
        }

        /* ==================== 连接里程碑（创意版块5） ==================== */
        .timeline {
            padding: 90px 0;
            background: var(--bg-deep);
        }

        .timeline-track {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            padding: 20px 0;
        }

        .timeline-track::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: var(--border-subtle);
            transform: translateX(-50%);
        }

        .timeline-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            position: relative;
        }

        .timeline-item:nth-child(odd) {
            flex-direction: row;
        }

        .timeline-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .timeline-dot {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 14px;
            height: 14px;
            background: var(--gradient-main);
            border-radius: 50%;
            box-shadow: 0 0 20px var(--accent-glow);
            z-index: 1;
        }

        .timeline-content {
            width: calc(50% - 40px);
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px 24px;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            box-shadow: var(--shadow-soft);
        }

        .timeline-content:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .timeline-content .year {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 1px;
            margin-bottom: 4px;
        }

        .timeline-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .timeline-content p {
            font-size: 13px;
            color: var(--text-tertiary);
            line-height: 1.6;
        }

        /* ==================== 信任数据 ==================== */
        .trust {
            padding: 70px 0;
            background: var(--bg-deep);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }

        .trust-grid .number {
            font-size: 42px;
            font-weight: 900;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -1px;
        }

        .trust-grid .label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        .trust-tags {
            display: flex;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
            margin-top: 36px;
            padding-top: 36px;
            border-top: 1px solid var(--border-subtle);
        }

        .trust-tags span {
            background: rgba(255, 255, 255, 0.04);
            padding: 6px 20px;
            border-radius: var(--radius-full);
            font-size: 13px;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            letter-spacing: 0.3px;
            transition: var(--transition);
        }

        .trust-tags span:hover {
            border-color: var(--border-glow);
            color: var(--text-main);
            box-shadow: 0 0 16px var(--accent-glow);
        }

        /* ==================== 连接智库 FAQ ==================== */
        .faq {
            padding: 90px 0;
            background: var(--bg-surface);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 26px 30px;
            box-shadow: var(--shadow-soft);
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .faq-item .question {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            letter-spacing: -0.3px;
        }

        .faq-item .question .q-badge {
            background: var(--gradient-main);
            color: #0c0a14;
            font-size: 12px;
            font-weight: 800;
            padding: 2px 11px;
            border-radius: 4px;
            flex-shrink: 0;
            letter-spacing: 0.5px;
        }

        .faq-item .answer {
            padding-left: 8px;
        }

        .faq-item .step {
            display: flex;
            gap: 14px;
            margin-bottom: 12px;
            padding: 14px 18px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 8px;
            border-left: 3px solid var(--accent);
            transition: var(--transition);
        }

        .faq-item .step:hover {
            background: rgba(255, 255, 255, 0.06);
            border-left-color: var(--accent-2);
        }

        .faq-item .step .step-num {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            background: var(--bg-surface);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            margin-top: 2px;
            border: 1px solid var(--border-glow);
        }

        .faq-item .step p {
            margin: 0;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        .faq-item .step p strong {
            color: var(--text-main);
            font-weight: 600;
        }

        /* ==================== Footer ==================== */
        .footer {
            background: var(--bg-deep);
            color: var(--text-secondary);
            padding: 60px 0 32px;
            border-top: 1px solid var(--border-subtle);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            max-width: 280px;
            margin-top: 10px;
            color: var(--text-tertiary);
        }

        .footer-col h5 {
            color: var(--text-main);
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.2px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            padding: 4px 0;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-tertiary);
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero p.sub {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-trust {
                justify-content: center;
            }
            .hero-visual {
                margin-top: 20px;
            }
            .hero-ring {
                max-width: 280px;
            }
            .features-grid,
            .download-grid,
            .scenarios-grid,
            .pulse-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .manifesto-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .speed-compare {
                grid-template-columns: 1fr;
            }
            .voices-grid {
                grid-template-columns: 1fr;
            }
            .timeline-track::before {
                left: 20px;
            }
            .timeline-dot {
                left: 20px;
            }
            .timeline-content {
                width: calc(100% - 50px);
                margin-left: 50px;
            }
            .timeline-item:nth-child(even) {
                flex-direction: row;
            }
        }

        @media (max-width: 768px) {
            .nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p.sub {
                font-size: 16px;
            }
            .hero {
                padding: 130px 0 50px;
                min-height: auto;
            }
            .features-grid,
            .download-grid,
            .scenarios-grid,
            .pulse-grid {
                grid-template-columns: 1fr;
            }
            .trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .faq-item {
                padding: 18px 14px;
            }
            .faq-item .step {
                flex-direction: column;
                gap: 6px;
                padding: 10px 12px;
            }
            .faq-item .question {
                font-size: 15px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-title h2 {
                font-size: 26px;
            }
            .manifesto-quote p {
                font-size: 16px;
            }
            .speed-card .speed-value {
                font-size: 38px;
            }
            .timeline-content {
                padding: 14px 16px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .btn-primary {
                padding: 12px 26px;
                font-size: 15px;
            }
            .download-card .btn-download {
                padding: 8px 18px;
                font-size: 12px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .hero p.sub {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .trust-grid .number {
                font-size: 28px;
            }
            .faq-item .question {
                font-size: 13px;
            }
            .faq-item .step p {
                font-size: 12px;
            }
            .section-title h2 {
                font-size: 22px;
            }
            .manifesto-text h2 {
                font-size: 22px;
            }
            .pulse-card .metric {
                font-size: 24px;
            }
            .hero-trust {
                gap: 16px;
            }
            .trust-item .number {
                font-size: 20px;
            }
        }