:root {
            --primary-400: #34d399;
            --primary-500: #10b981;
            --primary-600: #059669;
            --primary-700: #047857;
            --primary-900: #064e3b;
            --gold-400: #fbbf24;
            --gold-500: #f59e0b;
            --gold-600: #d97706;
            --slate-50: #f8fafc;
            --slate-100: #f1f5f9;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --white: #ffffff;
            --green-500: #10b981;
            --green-600: #059669;
            --red-500: #ef4444;
            --radius-2xl: 1.25rem;
            --radius-xl: 1rem;
            --radius-lg: 0.75rem;
            --radius-md: 0.5rem;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 2px rgba(15,23,42,0.04);
            --shadow-md: 0 8px 24px rgba(15,23,42,0.07);
            --shadow-lg: 0 18px 40px rgba(15,23,42,0.10);
            --shadow-xl: 0 24px 56px rgba(15,23,42,0.13);
            --ease: 0.22s cubic-bezier(0.4,0,0.2,1);
        }
        * { margin:0; padding:0; box-sizing:border-box; }
        html { scroll-behavior:smooth; }
        body {
            font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
            color: var(--slate-800);
            background: var(--slate-50);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            font-display: swap;
        }
        /* 导航栏 */
        .nav {
            position: sticky; top:0; z-index:100;
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--slate-200);
        }
        .nav-inner {
            max-width:1240px; margin:0 auto;
            display:flex; align-items:center; justify-content:space-between;
            padding:12px 24px; gap:16px;
        }
        .nav-logo {
            display:flex; align-items:center; gap:10px;
            text-decoration:none; font-weight:800; font-size:20px;
            color: var(--slate-900); letter-spacing:-0.3px; flex-shrink:0;
        }
        .nav-logo svg { width:34px; height:34px; flex-shrink:0; }
        .nav-links { display:flex; align-items:center; gap:4px; flex-wrap:wrap; justify-content:flex-end; }
        .nav-links a {
            text-decoration:none; font-size:13.5px; font-weight:600;
            color: var(--slate-500); padding:8px 16px; border-radius:var(--radius-full);
            transition:var(--ease); white-space:nowrap;
        }
        .nav-links a:hover { color:var(--primary-600); background:rgba(16,185,129,0.07); }
        .nav-links a.nav-active { color:var(--primary-700); background:rgba(16,185,129,0.12); font-weight:700; }
        .nav-links a.nav-report { color:var(--red-500); font-weight:700; }
        .nav-links a.nav-report:hover { background:rgba(239,68,68,0.07); color:#dc2626; }
        /* Hero */
        .hero {
            max-width:1240px; margin:0 auto; padding:56px 24px 36px; text-align:center;
        }
        .hero-badge {
            display:inline-flex; align-items:center; gap:8px;
            background: rgba(16,185,129,0.06); border:1px solid rgba(16,185,129,0.16);
            padding:6px 18px; border-radius:var(--radius-full);
            font-size:12.5px; font-weight:700; color:var(--primary-700);
            margin-bottom:20px; letter-spacing:0.2px;
        }
        .hero-badge::before {
            content:''; width:7px; height:7px; background:var(--green-500);
            border-radius:50%; animation:pulse 2.2s infinite;
        }
        @keyframes pulse {
            0%,100% { opacity:1; box-shadow:0 0 0 0 rgba(16,185,129,0.5); }
            50% { opacity:0.4; box-shadow:0 0 0 8px rgba(16,185,129,0); }
        }
        .hero h1 {
            font-size:clamp(28px,4.5vw,46px); font-weight:900; color:var(--slate-900);
            letter-spacing:-1px; line-height:1.2; margin-bottom:14px;
        }
        .hero h1 .accent {
            background: linear-gradient(135deg, #10b981 0%, #f59e0b 70%);
            -webkit-background-clip:text; background-clip:text;
            -webkit-text-fill-color:transparent;
        }
        .hero>p {
            font-size:15px; color:var(--slate-500); max-width:660px;
            margin:0 auto 28px; line-height:1.7;
        }
        .hero-kv {
            display:flex; flex-wrap:wrap; justify-content:center; gap:20px;
            font-size:13px; color:var(--slate-500); font-weight:600;
        }
        .hero-kv span {
            background:var(--white); border:1px solid var(--slate-200);
            padding:5px 16px; border-radius:var(--radius-full);
            display:inline-flex; align-items:center; gap:5px;
        }
        .hero-kv span::before {
            content:''; width:5px; height:5px; background:var(--primary-500);
            border-radius:50%; flex-shrink:0;
        }
        /* 通用标题 */
        .sec-title {
            font-size:clamp(21px,2.8vw,26px); font-weight:800; color:var(--slate-900);
            letter-spacing:-0.5px; display:flex; align-items:center; gap:10px; margin-bottom:6px;
        }
        .sec-title::before {
            content:''; width:4px; height:22px;
            background:linear-gradient(180deg, #10b981 0%, #f59e0b 100%);
            border-radius:2px; flex-shrink:0;
        }
        .sec-sub {
            font-size:14px; color:var(--slate-500); margin-bottom:28px;
            max-width:620px; line-height:1.6;
        }
        /* 平台理念 */
        .mission-section {
            max-width:1240px; margin:0 auto 48px; padding:0 24px;
        }
        .mission-grid {
            display:grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
            gap:20px;
        }
        .mission-card {
            background:var(--white); border:1px solid var(--slate-200);
            border-radius:var(--radius-xl); padding:28px 22px;
            transition:var(--ease); position:relative;
        }
        .mission-card:hover {
            border-color:var(--primary-500); box-shadow:var(--shadow-lg);
            transform:translateY(-2px);
        }
        .mission-card .mc-icon {
            width:42px; height:42px; margin-bottom:12px; color:var(--primary-600);
        }
        .mission-card h3 { font-size:16px; font-weight:700; color:var(--slate-900); margin-bottom:6px; }
        .mission-card p { font-size:13px; color:var(--slate-500); line-height:1.6; }
        .mission-card .mc-num {
            position:absolute; top:10px; right:16px; font-size:38px; font-weight:900;
            color:rgba(16,185,129,0.05); pointer-events:none;
        }
        /* 时间线 */
        .timeline-section {
            max-width:1240px; margin:0 auto 48px; padding:0 24px;
        }
        .timeline-inner {
            background:var(--white); border:1px solid var(--slate-200);
            border-radius:var(--radius-2xl); padding:42px 34px; box-shadow:var(--shadow-sm);
        }
        .tl-track {
            position:relative; padding-left:30px;
        }
        .tl-track::before {
            content:''; position:absolute; left:7px; top:8px; bottom:8px;
            width:2px; background:linear-gradient(to bottom, #10b981, #d97706, #e2e8f0);
            border-radius:1px;
        }
        .tl-item {
            position:relative; margin-bottom:32px;
        }
        .tl-item::before {
            content:''; position:absolute; left:-30px; top:5px;
            width:14px; height:14px; border-radius:50%; background:var(--white);
            border:3px solid #10b981; box-sizing:border-box; z-index:2;
        }
        .tl-date {
            font-size:12px; font-weight:700; color:#059669; margin-bottom:4px;
            letter-spacing:0.4px; text-transform:uppercase;
        }
        .tl-body {
            background:var(--slate-50); border:1px solid var(--slate-200);
            border-radius:var(--radius-md); padding:18px 20px; transition:var(--ease);
        }
        .tl-body:hover { border-color:#10b981; box-shadow:var(--shadow-md); }
        .tl-body h4 { font-size:15px; color:var(--slate-900); font-weight:700; margin-bottom:4px; }
        .tl-body p { font-size:13px; color:var(--slate-500); line-height:1.55; }
        /* 价值观纸飞机 */
        .values-section {
            max-width:1240px; margin:0 auto 48px; padding:0 24px;
        }
        .values-inner {
            background:linear-gradient(150deg, #064e3b 0%, #065f46 40%, #0f172a 100%);
            border-radius:var(--radius-2xl); padding:46px 36px; color:#fff;
            box-shadow:var(--shadow-xl); position:relative; overflow:hidden;
        }
        .values-inner::after {
            content:''; position:absolute; top:-50px; right:-50px;
            width:200px; height:200px;
            background:radial-gradient(circle, rgba(16,185,129,0.18) 0%, transparent 70%);
            border-radius:50%; pointer-events:none;
        }
        .values-title {
            font-size:22px; font-weight:800; margin-bottom:24px;
            position:relative; z-index:1; display:flex; align-items:center; gap:10px;
        }
        .values-grid {
            display:grid; grid-template-columns: repeat(auto-fit, minmax(210px,1fr));
            gap:18px; position:relative; z-index:1;
        }
        .value-card {
            background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.12);
            border-radius:var(--radius-lg); padding:20px 16px; text-align:center;
            transition:var(--ease);
        }
        .value-card:hover {
            background:rgba(255,255,255,0.1); border-color:var(--primary-400);
            transform:translateY(-2px);
        }
        .value-card .v-icon {
            width:38px; height:38px; margin:0 auto 10px; color:var(--primary-400);
        }
        .value-card h4 { font-size:14px; font-weight:700; color:#fff; margin-bottom:4px; }
        .value-card p { font-size:11.5px; color:#a7f3d0; line-height:1.5; }
        /* 数据展示 */
        .stats-section {
            max-width:1240px; margin:0 auto 48px; padding:0 24px;
        }
        .stats-grid {
            display:grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr));
            gap:14px; text-align:center;
        }
        .stat-box {
            background:var(--white); border:1px solid var(--slate-200);
            border-radius:var(--radius-lg); padding:22px 14px; transition:var(--ease);
        }
        .stat-box:hover { border-color:var(--primary-500); box-shadow:var(--shadow-md); }
        .stat-box .s-val { font-size:30px; font-weight:900; color:var(--primary-700); letter-spacing:-0.8px; }
        .stat-box .s-label { font-size:12px; color:var(--slate-500); font-weight:600; margin-top:4px; }
        /* FAQ */
        .faq-section {
            max-width:1240px; margin:0 auto 48px; padding:0 24px;
        }
        .faq-inner {
            background:var(--white); border:1px solid var(--slate-200);
            border-radius:var(--radius-2xl); padding:42px 34px; box-shadow:var(--shadow-sm);
        }
        .faq-grid {
            display:grid; grid-template-columns: repeat(auto-fit, minmax(280px,1fr));
            gap:12px; margin-bottom:20px;
        }
        .faq-item {
            border:1px solid var(--slate-200); border-radius:var(--radius-md);
            overflow:hidden; transition:var(--ease);
        }
        .faq-item:hover { border-color:var(--primary-600); }
        .faq-item summary {
            padding:14px 16px; font-weight:700; font-size:13px; color:var(--slate-800);
            cursor:pointer; list-style:none; display:flex; justify-content:space-between;
            align-items:center; background:var(--slate-50); transition:var(--ease); gap:8px;
        }
        .faq-item summary::-webkit-details-marker { display:none; }
        .faq-item summary::after {
            content:'+'; font-size:17px; color:var(--primary-600); font-weight:500;
            flex-shrink:0; transition:transform 0.2s;
        }
        .faq-item[open] summary::after { content:'−'; transform:rotate(180deg); }
        .faq-item[open] summary { background:var(--white); color:var(--primary-700); }
        .faq-item p { padding:0 16px 13px; font-size:12px; color:var(--slate-500); line-height:1.55; }
        .faq-more {
            display:inline-flex; align-items:center; gap:4px;
            font-weight:700; font-size:13.5px; color:var(--primary-600);
            text-decoration:none; transition:var(--ease);
        }
        .faq-more:hover { gap:8px; color:var(--gold-600); }
        /* 页脚 */
        .footer {
            background:#064e3b; color:#d1fae5; padding:56px 24px 28px;
        }
        .footer-grid {
            max-width:1240px; margin:0 auto; display:grid;
            grid-template-columns:1fr 1.6fr; gap:44px;
            padding-bottom:36px; border-bottom:1px solid rgba(255,255,255,0.1);
        }
        .footer-brand h4 { font-size:18px; font-weight:800; color:#fff; margin-bottom:8px; }
        .footer-brand p { font-size:12.5px; color:#a7f3d0; max-width:340px; line-height:1.65; margin-bottom:14px; }
        .footer-status {
            display:inline-flex; align-items:center; gap:6px;
            background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.12);
            padding:5px 14px; border-radius:var(--radius-full);
            font-size:11px; color:#6ee7b7; font-weight:700;
        }
        .footer-status::before {
            content:''; width:5px; height:5px; background:#6ee7b7;
            border-radius:50%; animation:pulse 2.2s infinite;
        }
        .footer-links { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
        .footer-col h5 { font-size:12px; font-weight:700; text-transform:uppercase; color:#fff; margin-bottom:12px; letter-spacing:0.5px; }
        .footer-col ul { list-style:none; }
        .footer-col ul li { margin-bottom:6px; }
        .footer-col ul li a { font-size:12.5px; color:#a7f3d0; text-decoration:none; transition:color 0.15s; }
        .footer-col ul li a:hover { color:#fbbf24; }
        .footer-bar {
            max-width:1240px; margin:24px auto 0; display:flex;
            justify-content:space-between; align-items:center; font-size:11.5px;
            color:#6ee7b7; flex-wrap:wrap; gap:12px;
        }
        .sha-badge {
            font-family:'SF Mono','Cascadia Code','Consolas',monospace;
            background:rgba(255,255,255,0.06); padding:3px 10px;
            border-radius:4px; border:1px solid rgba(255,255,255,0.12);
            color:#d1fae5; font-size:10.5px;
        }
        /* 响应式 */
        @media (max-width:900px) {
            .footer-grid { grid-template-columns:1fr; gap:30px; }
            .footer-links { grid-template-columns:1fr 1fr; gap:20px; }
        }
        @media (max-width:768px) {
            .nav-links { display:none; }
            .nav-inner { padding:10px 16px; }
            .nav-logo { font-size:17px; }
            .nav-logo svg { width:28px; height:28px; }
            .mission-grid { grid-template-columns:1fr; }
            .values-grid { grid-template-columns:1fr; }
            .timeline-inner, .values-inner, .faq-inner { padding:26px 18px; }
            .faq-grid { grid-template-columns:1fr; }
            .hero h1 { font-size:24px; }
        }
        @media (max-width:600px) {
            .footer-links { grid-template-columns:1fr; gap:16px; }
            .footer-bar { flex-direction:column; text-align:center; }
        }
        @media (prefers-reduced-motion: reduce) {
            * { transition-duration:0.01ms !important; animation-duration:0.01ms !important; }
            .hero-badge::before, .footer-status::before { animation:none; }
            .mission-card:hover, .value-card:hover, .stat-box:hover { transform:none; }
        }