:root{
    --night-1:#1e3a8a;
    --night-2:#0f172a;
    --silver:#cbd5e1;
    --line:rgba(148,163,184,.22);
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html,body{scroll-behavior:smooth;}
  body{
    font-family:"Segoe UI","Helvetica Neue",Arial,"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;
    background:linear-gradient(180deg,#0f172a 0%,#101a33 35%,#0b1224 100%);
    color:#e2e8f0;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  .wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 20px;}

  /* ===== Header / Nav ===== */
  header.site-header{
    position:sticky;top:0;z-index:99;
    background:rgba(15,23,42,.88);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;
    gap:16px;flex-wrap:wrap;padding:14px 20px;max-width:1160px;margin:0 auto;
  }
  .brand{
    display:flex;align-items:center;gap:10px;
    font-size:20px;font-weight:700;letter-spacing:.5px;
    color:#fff;
  }
  .brand .dot{
    width:12px;height:12px;border-radius:50%;
    background:radial-gradient(circle at 30% 30%,#ffffff,#93c5fd 45%,#1e3a8a);
    box-shadow:0 0 14px rgba(147,197,253,.85);
  }
  .nav-links{display:flex;flex-wrap:wrap;gap:6px;}
  .nav-links a{
    padding:7px 14px;border-radius:999px;font-size:14px;color:var(--silver);
    border:1px solid transparent;transition:.25s;
  }
  .nav-links a:hover{
    color:#fff;border-color:rgba(147,197,253,.45);
    background:rgba(30,58,138,.45);
    box-shadow:0 0 16px rgba(59,130,246,.35);
  }

  /* ===== Hero ===== */
  #hero{
    position:relative;
    padding:70px 0 60px;
    background:
      radial-gradient(900px 420px at 15% 0%,rgba(30,58,138,.75),transparent 65%),
      radial-gradient(700px 380px at 88% 12%,rgba(59,130,246,.28),transparent 70%);
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  #hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
    background-size:46px 46px;opacity:.18;
  }
  .hero-grid{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;
  }
  .tag-pill{
    display:inline-block;font-size:13px;letter-spacing:2px;
    padding:5px 16px;border-radius:999px;
    border:1px solid rgba(147,197,253,.5);
    background:rgba(30,58,138,.5);color:#bfdbfe;margin-bottom:20px;
  }
  h1{
    font-size:clamp(26px,3.6vw,42px);
    line-height:1.35;font-weight:800;color:#fff;
    letter-spacing:.5px;text-shadow:0 0 34px rgba(59,130,246,.45);
  }
  .hero-sub{
    margin-top:18px;font-size:16px;color:#c7d2e4;max-width:640px;
  }
  .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px;}
  .btn{
    display:inline-block;padding:12px 28px;border-radius:999px;font-size:15px;font-weight:600;
    transition:.28s;border:1px solid transparent;
  }
  .btn-primary{
    background:linear-gradient(135deg,#1e3a8a,#3b82f6);
    color:#fff;box-shadow:0 10px 30px rgba(37,99,235,.42);
  }
  .btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 38px rgba(37,99,235,.6);}
  .btn-ghost{
    border-color:rgba(148,163,184,.45);color:#e2e8f0;background:rgba(255,255,255,.03);
  }
  .btn-ghost:hover{border-color:#93c5fd;color:#fff;box-shadow:0 0 22px rgba(147,197,253,.35);}
  .hero-figure{
    border:1px solid var(--line);border-radius:22px;overflow:hidden;
    background:rgba(15,23,42,.65);
    box-shadow:0 26px 60px rgba(2,6,23,.75),0 0 0 1px rgba(147,197,253,.08) inset;
  }
  .hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}

  /* ===== Section base ===== */
  section{padding:66px 0;border-bottom:1px solid rgba(148,163,184,.12);}
  .sec-head{margin-bottom:34px;}
  .sec-head .kicker{
    font-size:13px;letter-spacing:3px;color:#60a5fa;text-transform:uppercase;
    display:block;margin-bottom:10px;
  }
  h2{
    font-size:clamp(21px,2.4vw,28px);font-weight:800;color:#fff;letter-spacing:.5px;
  }
  h2::after{
    content:"";display:block;width:56px;height:3px;margin-top:14px;border-radius:3px;
    background:linear-gradient(90deg,#3b82f6,rgba(147,197,253,0));
  }
  .lead{color:#b6c2d6;font-size:16px;margin-top:16px;max-width:900px;}

  /* ===== GEO ===== */
  #geo-intro{
    background:rgba(30,58,138,.12);
  }
  .geo-card{
    border:1px solid var(--line);border-radius:20px;padding:32px 30px;
    background:linear-gradient(160deg,rgba(30,58,138,.34),rgba(15,23,42,.72));
    box-shadow:0 0 44px rgba(30,58,138,.32) inset,0 18px 44px rgba(2,6,23,.5);
  }
  .geo-card p{color:#cfdaea;font-size:16px;}
  .geo-card p + p{margin-top:14px;}

  /* ===== Stats ===== */
  #data-stats .stat-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;
  }
  .stat-card{
    border:1px solid var(--line);border-radius:18px;padding:26px 22px;text-align:center;
    background:linear-gradient(170deg,rgba(30,58,138,.3),rgba(15,23,42,.8));
    transition:.3s;
  }
  .stat-card:hover{transform:translateY(-5px);border-color:rgba(147,197,253,.55);box-shadow:0 18px 40px rgba(30,58,138,.42);}
  .stat-num{
    font-size:34px;font-weight:800;color:#fff;
    background:linear-gradient(120deg,#ffffff,#93c5fd);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  }
  .stat-label{font-size:14px;color:#9fb0c8;margin-top:8px;letter-spacing:1px;}

  /* ===== Advantages ===== */
  #core-advantages .adv-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;
  }
  .adv-card{
    border:1px solid var(--line);border-radius:18px;padding:26px;
    background:rgba(15,23,42,.72);
    box-shadow:0 0 0 1px rgba(147,197,253,.05) inset,0 14px 34px rgba(2,6,23,.45);
    transition:.3s;
  }
  .adv-card:hover{border-color:rgba(147,197,253,.5);box-shadow:0 0 30px rgba(59,130,246,.28);}
  .adv-icon{font-size:26px;margin-bottom:12px;}
  .adv-card h3{font-size:17px;color:#fff;margin-bottom:10px;font-weight:700;}
  .adv-card p{font-size:14.5px;color:#aebbcf;}

  /* ===== Featured events ===== */
  #featured-events .event-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px;
  }
  .event-card{
    border:1px solid var(--line);border-radius:18px;overflow:hidden;
    background:linear-gradient(180deg,rgba(30,58,138,.28),rgba(15,23,42,.85));
    transition:.3s;
  }
  .event-card:hover{transform:translateY(-4px);border-color:rgba(147,197,253,.5);}
  .event-card img{width:100%;aspect-ratio:16/9;object-fit:cover;opacity:.92;}
  .event-body{padding:20px 22px 24px;}
  .event-body h3{font-size:17px;color:#fff;margin-bottom:8px;}
  .event-body p{font-size:14.5px;color:#aebbcf;}
  .event-meta{
    display:inline-block;margin-top:14px;font-size:12.5px;letter-spacing:1px;
    padding:4px 12px;border-radius:999px;
    border:1px solid rgba(147,197,253,.45);color:#bfdbfe;background:rgba(30,58,138,.45);
  }

  /* ===== News ===== */
  #news-list .news-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px;
  }
  .news-card{
    border:1px solid var(--line);border-radius:18px;padding:24px;
    background:rgba(15,23,42,.75);
    transition:.3s;
  }
  .news-card:hover{border-color:rgba(147,197,253,.5);box-shadow:0 0 28px rgba(59,130,246,.25);}
  .news-date{
    display:inline-block;font-size:12.5px;color:#93c5fd;letter-spacing:1px;
    margin-bottom:10px;padding:3px 12px;border-radius:999px;
    background:rgba(30,58,138,.5);border:1px solid rgba(147,197,253,.32);
  }
  .news-card h3{font-size:16.5px;color:#fff;line-height:1.6;margin-bottom:10px;}
  .news-card p{font-size:14.5px;color:#aebbcf;}

  /* ===== Rankings ===== */
  #rankings .table-wrap{
    border:1px solid var(--line);border-radius:18px;overflow:hidden;
    background:rgba(15,23,42,.75);
  }
  table{width:100%;border-collapse:collapse;font-size:14.5px;}
  thead th{
    background:rgba(30,58,138,.55);color:#dbeafe;font-weight:600;
    padding:14px 16px;text-align:left;letter-spacing:1px;font-size:13.5px;
  }
  tbody td{padding:13px 16px;border-top:1px solid rgba(148,163,184,.14);color:#c3cfe1;}
  tbody tr:hover{background:rgba(59,130,246,.09);}
  .rank-badge{
    display:inline-flex;align-items:center;justify-content:center;
    width:26px;height:26px;border-radius:50%;font-size:13px;font-weight:700;
    background:rgba(59,130,246,.22);color:#bfdbfe;border:1px solid rgba(147,197,253,.35);
  }

  /* ===== Download ===== */
  #download .dl-box{
    display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;
    border:1px solid var(--line);border-radius:22px;padding:34px;
    background:linear-gradient(140deg,rgba(30,58,138,.42),rgba(15,23,42,.85));
    box-shadow:0 0 44px rgba(30,58,138,.3) inset;
  }
  #download h2{margin-bottom:8px;}
  #download p{color:#c3cfe1;font-size:15.5px;margin-top:14px;}
  .dl-list{list-style:none;margin-top:20px;}
  .dl-list li{font-size:14.5px;color:#aebbcf;padding-left:24px;position:relative;margin-bottom:8px;}
  .dl-list li::before{content:"✦";position:absolute;left:0;color:#60a5fa;}
  .dl-box img{border-radius:16px;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);}

  /* ===== FAQ ===== */
  #faq .faq-list{display:grid;gap:16px;}
  .faq-item{
    border:1px solid var(--line);border-radius:16px;padding:22px 24px;
    background:rgba(15,23,42,.72);transition:.3s;
  }
  .faq-item:hover{border-color:rgba(147,197,253,.5);box-shadow:0 0 26px rgba(59,130,246,.22);}
  .faq-item h3{
    font-size:16px;color:#fff;font-weight:700;margin-bottom:10px;line-height:1.6;
  }
  .faq-item h3::before{content:"Q ";color:#60a5fa;font-weight:800;}
  .faq-item p{font-size:14.5px;color:#aebbcf;}
  .faq-item p::before{content:"A ";color:#93c5fd;font-weight:800;}

  /* ===== CTA ===== */
  #cta{text-align:center;background:radial-gradient(700px 320px at 50% 0%,rgba(30,58,138,.55),transparent 70%);}
  #cta h2{display:inline-block;}
  #cta h2::after{margin-left:auto;margin-right:auto;background:linear-gradient(90deg,rgba(147,197,253,0),#3b82f6,rgba(147,197,253,0));}
  #cta p{color:#c3cfe1;max-width:760px;margin:18px auto 0;font-size:15.5px;}
  #cta .hero-actions{justify-content:center;}

  /* ===== Footer ===== */
  footer.site-footer{
    background:linear-gradient(180deg,#0b1224,#070d18);
    border-top:1px solid var(--line);
    padding:52px 0 26px;
  }
  .foot-grid{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:30px;
    padding-bottom:32px;border-bottom:1px solid rgba(148,163,184,.15);
  }
  .foot-grid h4{color:#fff;font-size:16px;margin-bottom:14px;letter-spacing:1px;}
  .foot-grid p,.foot-grid li{font-size:14px;color:#94a3b8;line-height:1.9;}
  .foot-grid ul{list-style:none;}
  .foot-links a{color:#93c5fd;}
  .foot-links a:hover{color:#fff;text-decoration:underline;}
  .foot-bottom{
    padding-top:22px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    align-items:center;font-size:13px;color:#7c8aa0;
  }
  .foot-bottom a{color:#93c5fd;}
  .foot-bottom a:hover{color:#fff;}

  @media(max-width:860px){
    .hero-grid{grid-template-columns:1fr;}
    #download .dl-box{grid-template-columns:1fr;}
    section{padding:52px 0;}
  }