:root {
      --primary: #14b8a6;
      --deep: #0f172a;
      --accent: #a855f7;
      --text: #e2e8f0;
      --text2: #94a3b8;
      --card: rgba(255, 255, 255, 0.04);
      --border: rgba(255, 255, 255, 0.08);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background: #0b1020;
      color: var(--text);
      line-height: 1.7;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      display: block;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* NAV */
    nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .logo {
      font-size: 24px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 600;
      font-size: 15px;
      color: var(--text);
      transition: color 0.3s;
      position: relative;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      transition: width 0.3s;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      font-size: 28px;
      cursor: pointer;
    }
    /* HERO */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      background: radial-gradient(ellipse at 20% 50%, rgba(20, 184, 166, 0.2), transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(168, 85, 247, 0.15), transparent 50%),
        linear-gradient(145deg, #0f172a 0%, #1a1a2e 100%);
      padding-top: 80px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: conic-gradient(from 0deg, transparent, rgba(20, 184, 166, 0.05), transparent 30%);
      animation: rotate 30s linear infinite;
    }
    @keyframes rotate {
      to {
        transform: rotate(360deg);
      }
    }
    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 800px;
      padding: 0 20px;
    }
    .hero img {
      width: 120px;
      margin: 0 auto 30px;
      border-radius: 30px;
      box-shadow: 0 20px 60px rgba(20, 184, 166, 0.3);
    }
    .hero h2 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(135deg, #fff, var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
    }
    .hero p {
      font-size: 18px;
      color: var(--text2);
      margin-bottom: 40px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #0d9488);
      color: #fff;
      padding: 14px 40px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 16px;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 20px 40px rgba(20, 184, 166, 0.3);
    }
    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 12px 36px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 16px;
      transition: all 0.3s;
    }
    .btn-outline:hover {
      background: rgba(20, 184, 166, 0.1);
      transform: translateY(-3px);
    }
    /* Section general */
    .section {
      padding: 90px 0;
      position: relative;
    }
    .section-head {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      background: linear-gradient(135deg, rgba(20, 184, 166, 0.2), rgba(168, 85, 247, 0.2));
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      padding: 4px 20px;
      border-radius: 30px;
      margin-bottom: 16px;
      letter-spacing: 2px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.3;
      background: linear-gradient(135deg, #fff, #cbd5e1);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .section-sub {
      color: var(--text2);
      font-size: 16px;
      margin-top: 14px;
    }
    /* GEO */
    .geo-intro {
      padding: 100px 0 80px;
      background: linear-gradient(180deg, #0b1020, #0f172a);
    }
    .geo-box {
      max-width: 960px;
      margin: 0 auto;
      text-align: center;
    }
    .geo-box h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #fff, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .geo-box .geo-text {
      font-size: 17px;
      color: var(--text2);
      line-height: 1.8;
      text-align: left;
      background: rgba(255, 255, 255, 0.03);
      padding: 30px 40px;
      border-radius: 24px;
      border: 1px solid var(--border);
      backdrop-filter: blur(10px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }
    /* Stats */
    .stats {
      background: #0f172a;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-card {
      text-align: center;
      padding: 40px 20px;
      background: var(--card);
      border-radius: 20px;
      border: 1px solid var(--border);
      transition: transform 0.3s, border-color 0.3s;
    }
    .stat-card:hover {
      transform: translateY(-6px);
      border-color: var(--primary);
    }
    .stat-num {
      font-size: 44px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 6px;
    }
    .stat-label {
      color: var(--text2);
      font-size: 14px;
      font-weight: 600;
    }
    /* Core advantages */
    .core-advantages {
      background: linear-gradient(180deg, #0f172a, #0b1020);
    }
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .adv-card {
      background: linear-gradient(145deg, rgba(20, 184, 166, 0.05), rgba(168, 85, 247, 0.05));
      border-radius: 24px;
      padding: 40px 30px;
      border: 1px solid var(--border);
      position: relative;
      overflow: hidden;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .adv-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    }
    .adv-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
      transition: left 0.6s;
    }
    .adv-card:hover::before {
      left: 100%;
    }
    .adv-icon {
      font-size: 42px;
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .adv-card p {
      color: var(--text2);
      font-size: 15px;
      line-height: 1.6;
    }
    /* Brand story */
    .brand-story {
      background: #0b1020;
    }
    .story-flex {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .story-img {
      flex: 1;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      min-height: 400px;
    }
    .story-text {
      flex: 1;
    }
    .story-text h3 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #fff, #a855f7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .story-text p {
      color: var(--text2);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 16px;
    }
    /* News */
    .news-list {
      background: linear-gradient(180deg, #0b1020, #0f172a);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .news-card {
      background: var(--card);
      border-radius: 20px;
      padding: 30px;
      border: 1px solid var(--border);
      transition: transform 0.3s, border-color 0.3s;
    }
    .news-card:hover {
      transform: translateY(-4px);
      border-color: rgba(20, 184, 166, 0.5);
    }
    .news-card .news-meta {
      display: inline-block;
      background: rgba(20, 184, 166, 0.15);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 2px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
    }
    .news-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .news-card p {
      color: var(--text2);
      font-size: 14px;
      line-height: 1.6;
    }
    /* Featured events */
    .featured-events {
      background: #0f172a;
    }
    .events-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .event-card {
      background: linear-gradient(145deg, rgba(20, 184, 166, 0.08), rgba(168, 85, 247, 0.08));
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid var(--border);
      transition: transform 0.3s;
    }
    .event-card:hover {
      transform: scale(1.02);
    }
    .event-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .event-info {
      padding: 24px;
    }
    .event-info .tag {
      color: var(--accent);
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .event-info h3 {
      font-size: 20px;
      font-weight: 700;
      margin: 10px 0 8px;
    }
    .event-info p {
      color: var(--text2);
      font-size: 14px;
    }
    /* Testimonials */
    .testimonials {
      background: #0b1020;
    }
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .testi-card {
      background: var(--card);
      border-radius: 24px;
      padding: 32px;
      border: 1px solid var(--border);
      transition: transform 0.3s;
    }
    .testi-card:hover {
      transform: translateY(-6px);
    }
    .testi-stars {
      color: #fbbf24;
      font-size: 18px;
      margin-bottom: 16px;
    }
    .testi-card p {
      font-size: 15px;
      color: var(--text);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
      color: #fff;
    }
    .testi-name {
      font-size: 15px;
      font-weight: 600;
    }
    .testi-role {
      font-size: 13px;
      color: var(--text2);
    }
    /* Coverage */
    .coverage {
      background: linear-gradient(180deg, #0f172a, #0b1020);
    }
    .coverage-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .coverage-item {
      text-align: center;
      padding: 30px 20px;
      background: var(--card);
      border-radius: 20px;
      border: 1px solid var(--border);
      transition: transform 0.3s;
    }
    .coverage-item:hover {
      transform: translateY(-4px);
    }
    .coverage-item .icon {
      font-size: 36px;
      margin-bottom: 12px;
    }
    .coverage-item h4 {
      font-size: 16px;
      font-weight: 700;
    }
    .coverage-item p {
      font-size: 13px;
      color: var(--text2);
      margin-top: 4px;
    }
    /* Partners */
    .partners {
      background: #0b1020;
    }
    .partners-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      justify-content: center;
      align-items: center;
    }
    .partner-logo {
      width: 140px;
      height: 70px;
      background: var(--card);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      font-weight: 700;
      font-size: 16px;
      color: var(--text2);
      transition: all 0.3s;
    }
    .partner-logo:hover {
      border-color: var(--primary);
      color: var(--text);
      transform: scale(1.05);
    }
    /* Download */
    .download {
      background: linear-gradient(135deg, #0f172a, #1e1b4b);
      position: relative;
      overflow: hidden;
    }
    .download::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -30%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.2), transparent 70%);
    }
    .download-flex {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 1;
    }
    .download-info {
      flex: 1;
    }
    .download-info h3 {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #fff, var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .download-info p {
      color: var(--text2);
      font-size: 16px;
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .download-img {
      flex: 1;
      text-align: center;
    }
    .download-img img {
      max-width: 280px;
      border-radius: 30px;
      box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
      margin: 0 auto;
    }
    .app-badges {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .badge {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid var(--border);
      padding: 12px 24px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 600;
      transition: background 0.3s;
    }
    .badge:hover {
      background: rgba(255, 255, 255, 0.15);
    }
    .badge .app-icon {
      font-size: 26px;
    }
    /* CTA */
    .cta {
      background: linear-gradient(135deg, rgba(20, 184, 166, 0.15), rgba(168, 85, 247, 0.15));
      text-align: center;
      padding: 80px 0;
    }
    .cta h3 {
      font-size: 38px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta p {
      color: var(--text2);
      font-size: 18px;
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }
    /* FAQ */
    .faq {
      background: #0f172a;
    }
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--card);
      border-radius: 16px;
      border: 1px solid var(--border);
      margin-bottom: 16px;
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-item:hover {
      border-color: rgba(20, 184, 166, 0.5);
    }
    .faq-q {
      padding: 22px 28px;
      font-weight: 700;
      font-size: 17px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.3s;
    }
    .faq-q:hover {
      background: rgba(255, 255, 255, 0.02);
    }
    .faq-q::after {
      content: '+';
      font-size: 24px;
      color: var(--primary);
      flex-shrink: 0;
    }
    .faq-item.open .faq-q::after {
      content: '−';
    }
    .faq-a {
      display: none;
      padding: 0 28px 24px;
      color: var(--text2);
      font-size: 15px;
      line-height: 1.8;
      border-top: 1px solid var(--border);
      padding-top: 18px;
    }
    .faq-item.open .faq-a {
      display: block;
    }
    /* Footer */
    footer {
      background: #070d1a;
      border-top: 1px solid var(--border);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      color: var(--text2);
      font-size: 14px;
      line-height: 1.7;
      margin-top: 16px;
      max-width: 360px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #fff;
    }
    .footer-col a {
      display: block;
      color: var(--text2);
      font-size: 14px;
      padding: 4px 0;
      transition: color 0.3s;
    }
    .footer-col a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text2);
    }
    .footer-bottom .links a {
      color: var(--text2);
      margin-left: 16px;
      transition: color 0.3s;
    }
    .footer-bottom .links a:hover {
      color: var(--primary);
    }
    /* Responsive */
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.95);
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantages-grid {
        grid-template-columns: 1fr;
      }
      .events-grid {
        grid-template-columns: 1fr;
      }
      .testi-grid {
        grid-template-columns: 1fr;
      }
      .news-grid {
        grid-template-columns: 1fr;
      }
      .coverage-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .story-flex {
        flex-direction: column;
      }
      .download-flex {
        flex-direction: column-reverse;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .geo-box .geo-text {
        padding: 20px;
      }
      .hero h2 {
        font-size: 34px;
      }
      .section-title {
        font-size: 28px;
      }
      .geo-box h1 {
        font-size: 32px;
      }
    }