* {
    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 {
    font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
    background: #f4f5f7;
    color: #1f2937;
    line-height: 1.85;
    font-size: 16px;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; border-radius: 10px; }
  .wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

  /* Header */
  .site-header {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 55%, #7f1d1d 100%);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 99;
    box-shadow: 0 4px 20px rgba(127, 29, 29, .32);
  }
  .header-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
  }
  .site-logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
  }
  .nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }
  .nav-links a {
    color: #fff;
    font-size: 15px;
    padding: 8px 14px;
    border-radius: 8px;
    transition: background .2s ease, transform .2s ease;
    font-weight: 500;
  }
  .nav-links a:hover {
    background: rgba(255, 255, 255, .2);
    transform: translateY(-1px);
  }

  /* Hero */
  #hero {
    background: linear-gradient(150deg, #7f1d1d 0%, #b91c1c 45%, #dc2626 100%);
    color: #fff;
    padding: 58px 0 52px;
    position: relative;
    overflow: hidden;
  }
  #hero::after {
    content: "";
    position: absolute;
    right: -120px;
    top: -120px;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .07);
  }
  .hero-grid {
    display: grid;
    grid-template-columns: 1.25fr .75fr;
    gap: 36px;
    align-items: center;
    position: relative;
    z-index: 2;
  }
  .hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, .18);
    border: 1px solid rgba(255, 255, 255, .35);
    padding: 5px 14px;
    border-radius: 999px;
    font-size: 13px;
    letter-spacing: 1px;
    margin-bottom: 16px;
  }
  h1 {
    font-size: clamp(24px, 3.6vw, 38px);
    line-height: 1.35;
    font-weight: 800;
    letter-spacing: .5px;
    margin-bottom: 18px;
  }
  .hero-sub {
    font-size: 16px;
    color: #fee2e2;
    margin-bottom: 26px;
  }
  .btn-group { display: flex; flex-wrap: wrap; gap: 12px; }
  .btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 15px;
    transition: transform .2s ease, box-shadow .2s ease;
  }
  .btn-primary {
    background: #fff;
    color: #b91c1c;
    box-shadow: 0 8px 20px rgba(0, 0, 0, .18);
  }
  .btn-ghost {
    background: rgba(255, 255, 255, .14);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .45);
  }
  .btn:hover { transform: translateY(-2px); }

  /* Section basics */
  section { padding: 54px 0; }
  .sec-head { text-align: center; margin-bottom: 34px; }
  .sec-head h2 {
    font-size: clamp(21px, 2.6vw, 28px);
    color: #7f1d1d;
    font-weight: 800;
    position: relative;
    display: inline-block;
    padding-bottom: 12px;
  }
  .sec-head h2::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    width: 64px;
    height: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, #dc2626, #7f1d1d);
  }
  .sec-head p {
    color: #64748b;
    font-size: 15px;
    margin-top: 12px;
  }

  /* GEO intro */
  #geo-intro { background: #fff; }
  .geo-box {
    background: #fafafa;
    border-left: 6px solid #dc2626;
    border-radius: 12px;
    padding: 28px 30px;
    box-shadow: 0 6px 22px rgba(127, 29, 29, .07);
  }
  .geo-box p { color: #334155; font-size: 16px; margin-bottom: 14px; }
  .geo-box p:last-child { margin-bottom: 0; }
  .geo-flex {
    display: grid;
    grid-template-columns: 1.4fr .6fr;
    gap: 30px;
    align-items: center;
  }

  /* Stats */
  #data-stats {
    background: linear-gradient(135deg, #7f1d1d, #dc2626);
    color: #fff;
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
  }
  .stat-card {
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 14px;
    padding: 26px 18px;
    text-align: center;
    transition: transform .25s ease;
  }
  .stat-card:hover { transform: translateY(-4px); }
  .stat-num { font-size: 32px; font-weight: 800; letter-spacing: 1px; }
  .stat-label { font-size: 14px; color: #fee2e2; margin-top: 6px; }

  /* Advantages */
  #core-advantages { background: #f4f5f7; }
  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
  }
  .card {
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 6px 22px rgba(15, 23, 42, .07);
    transition: transform .25s ease, box-shadow .25s ease;
  }
  .card:hover { transform: translateY(-5px); box-shadow: 0 14px 30px rgba(127, 29, 29, .14); }
  .card-bar { height: 6px; background: linear-gradient(90deg, #dc2626, #7f1d1d); }
  .card-body { padding: 24px 22px 26px; }
  .card-body h3 { font-size: 18px; color: #7f1d1d; margin-bottom: 10px; font-weight: 700; }
  .card-body p { font-size: 15px; color: #475569; }
  .card-icon { font-size: 26px; margin-bottom: 10px; display: block; }

  /* Brand story */
  #brand-story { background: #fff; }
  .story-flex {
    display: grid;
    grid-template-columns: .85fr 1.15fr;
    gap: 36px;
    align-items: center;
  }
  .story-text h2 { font-size: clamp(21px, 2.6vw, 27px); color: #7f1d1d; margin-bottom: 16px; font-weight: 800; }
  .story-text p { color: #475569; margin-bottom: 14px; font-size: 15.5px; }

  /* Featured events */
  #featured-events { background: #f4f5f7; }
  .event-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 22px;
  }
  .event-card {
    background: #fff;
    border-radius: 14px;
    padding: 22px;
    box-shadow: 0 6px 22px rgba(15, 23, 42, .07);
    border-top: 5px solid #dc2626;
  }
  .event-card h3 { font-size: 17px; color: #7f1d1d; margin-bottom: 8px; }
  .event-card .tag {
    display: inline-block;
    font-size: 12px;
    background: #fee2e2;
    color: #b91c1c;
    padding: 3px 10px;
    border-radius: 999px;
    margin-bottom: 10px;
    font-weight: 600;
  }
  .event-card p { font-size: 14.5px; color: #475569; }

  /* News */
  #news-list { background: #fff; }
  .news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 22px;
  }
  .news-item {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 22px;
    transition: border-color .2s ease, box-shadow .2s ease;
  }
  .news-item:hover { border-color: #dc2626; box-shadow: 0 10px 26px rgba(220, 38, 38, .12); }
  .news-date {
    display: inline-block;
    font-size: 12.5px;
    color: #b91c1c;
    background: #fef2f2;
    border-radius: 6px;
    padding: 3px 10px;
    margin-bottom: 10px;
    font-weight: 600;
  }
  .news-item h3 { font-size: 17px; color: #1f2937; margin-bottom: 10px; font-weight: 700; line-height: 1.5; }
  .news-item p { font-size: 14.5px; color: #4b5563; }

  /* Download / app */
  #app-download {
    background: linear-gradient(135deg, #7f1d1d, #dc2626);
    color: #fff;
    text-align: center;
  }
  #app-download h2 { font-size: clamp(21px, 2.6vw, 28px); margin-bottom: 14px; font-weight: 800; }
  #app-download p { color: #fee2e2; max-width: 760px; margin: 0 auto 26px; font-size: 15.5px; }

  /* Partners */
  #partners { background: #f4f5f7; }
  .partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
  }
  .partner-item {
    background: #fff;
    border-radius: 12px;
    padding: 20px 14px;
    text-align: center;
    font-weight: 700;
    color: #7f1d1d;
    box-shadow: 0 4px 16px rgba(15, 23, 42, .06);
    font-size: 15px;
  }

  /* FAQ */
  #faq { background: #fff; }
  .faq-list { max-width: 900px; margin: 0 auto; }
  .faq-item {
    background: #fafafa;
    border-radius: 12px;
    margin-bottom: 14px;
    border-left: 5px solid #dc2626;
    padding: 20px 24px;
    box-shadow: 0 4px 16px rgba(15, 23, 42, .05);
  }
  .faq-item h3 {
    font-size: 16.5px;
    color: #7f1d1d;
    margin-bottom: 10px;
    font-weight: 700;
    line-height: 1.6;
  }
  .faq-item p { font-size: 15px; color: #475569; }

  /* Footer */
  .site-footer {
    background: linear-gradient(160deg, #7f1d1d, #450a0a);
    color: #fecaca;
    padding: 46px 0 26px;
    font-size: 14.5px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 28px;
    margin-bottom: 30px;
  }
  .footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 14px; font-weight: 700; }
  .footer-col p { margin-bottom: 8px; line-height: 1.9; }
  .footer-col a { color: #fecaca; transition: color .2s ease; }
  .footer-col a:hover { color: #fff; text-decoration: underline; }
  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .18);
    padding-top: 20px;
    text-align: center;
    color: #fca5a5;
    font-size: 13.5px;
    line-height: 2;
  }
  .footer-bottom a { color: #fecaca; }
  .footer-bottom a:hover { color: #fff; }

  @media (max-width: 860px) {
    .hero-grid, .geo-flex, .story-flex { grid-template-columns: 1fr; }
    .header-inner { justify-content: center; }
    .nav-links { justify-content: center; }
  }