*, *::before, *::after {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
  box-sizing: border-box;
}
:root {
  --ice: #0ea5e9;
  --deep: #1e3a5f;
  --cyan: #67e8f9;
  --silver: #e2f3ff;
  --glass: rgba(255,255,255,0.07);
  --stroke: rgba(150,220,255,0.22);
}
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: #dff1ff;
  background:
    radial-gradient(1200px 600px at 12% -8%, rgba(14,165,233,0.35), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(103,232,249,0.18), transparent 62%),
    linear-gradient(165deg, #071726 0%, #0d2a44 45%, #102f4f 70%, #071726 100%);
  background-attachment: fixed;
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { color: #ffffff; }
img { max-width: 100%; display: block; border-radius: 14px; }
.container { width: 92%; max-width: 1200px; margin: 0 auto; }
header.site-head {
  position: sticky; top: 0; z-index: 60;
  background: rgba(7,23,38,0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--stroke);
}
.head-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding: 12px 0; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: #ffffff; letter-spacing: 1px; }
.logo span.badge {
  display: inline-block; padding: 2px 8px; font-size: 12px; font-weight: 600;
  border-radius: 999px; color: #04263c;
  background: linear-gradient(120deg, var(--cyan), var(--ice));
}
.nav-links { display: flex; flex-wrap: wrap; gap: 6px; }
.nav-links a {
  padding: 8px 14px; border-radius: 999px; color: #cdeafd; font-size: 15px;
  border: 1px solid transparent; transition: .25s;
}
.nav-links a:hover {
  background: rgba(14,165,233,0.18);
  border-color: var(--stroke);
  color: #ffffff;
}
section { padding: 56px 0; }
h1 {
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.35; color: #ffffff; margin: 0 0 18px;
  text-shadow: 0 6px 26px rgba(14,165,233,0.35);
}
h2 { font-size: clamp(21px, 2.6vw, 30px); color: #f3fbff; margin: 0 0 10px; }
h3 { font-size: 18px; color: #ffffff; margin: 0 0 8px; }
.sub { color: #9fc9e6; margin: 0 0 26px; font-size: 15px; }
.glass {
  background: var(--glass);
  border: 1px solid var(--stroke);
  border-radius: 18px;
  padding: 22px 24px;
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 44px rgba(2,16,30,0.45), inset 0 1px 0 rgba(255,255,255,0.14);
}
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.g4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.hero-wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: center; }
@media (max-width: 860px) { .hero-wrap { grid-template-columns: 1fr; } }
.tag {
  display: inline-block; padding: 5px 13px; border-radius: 999px; font-size: 13px;
  color: #b9ecff; background: rgba(14,165,233,0.16); border: 1px solid var(--stroke); margin-bottom: 16px;
}
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  background: linear-gradient(120deg, var(--ice), #38bdf8 55%, var(--cyan));
  color: #04202f; box-shadow: 0 12px 30px rgba(14,165,233,0.35);
}
.btn.ghost { background: transparent; color: #d9f2ff; border: 1px solid var(--stroke); box-shadow: none; }
.stat { text-align: center; padding: 22px 16px; }
.stat b { display: block; font-size: 30px; color: #ffffff; letter-spacing: .5px; }
.stat i { font-style: normal; color: #9fc9e6; font-size: 14px; }
.news-item { padding: 20px 22px; margin-bottom: 16px; }
.news-item time { display: inline-block; font-size: 13px; color: #8fd8f5; margin-bottom: 6px; }
.news-item p { margin: 6px 0 0; color: #cbe6f7; font-size: 15px; }
.faq-item { margin-bottom: 16px; padding: 20px 22px; }
.faq-item h3 { color: var(--cyan); }
.faq-item p { margin: 6px 0 0; color: #cbe6f7; font-size: 15px; }
.rank-list { list-style: none; padding: 0; margin: 0; counter-reset: r; }
.rank-list li {
  counter-increment: r; display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 12px; margin-bottom: 8px;
  background: rgba(255,255,255,0.05); border: 1px solid rgba(150,220,255,0.14); font-size: 15px;
}
.rank-list li::before {
  content: counter(r);
  width: 26px; height: 26px; flex: none; border-radius: 50%;
  display: grid; place-items: center; font-size: 13px; font-weight: 700; color: #04202f;
  background: linear-gradient(120deg, var(--cyan), var(--ice));
}
.timeline-item { border-left: 2px solid rgba(103,232,249,0.4); padding: 0 0 18px 18px; margin-left: 6px; }
.timeline-item b { display: block; color: #ffffff; }
.quote { font-size: 15px; color: #d5ecfb; }
.quote b { color: #ffffff; display: block; margin-bottom: 6px; }
footer.site-foot {
  border-top: 1px solid var(--stroke);
  background: rgba(5,18,31,0.9);
  padding: 42px 0 26px; margin-top: 30px; font-size: 14px; color: #a9cbe2;
}
.foot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.foot-grid h4 { color: #ffffff; margin: 0 0 10px; font-size: 16px; }
.foot-grid p { margin: 4px 0; }
.foot-bottom { margin-top: 26px; padding-top: 16px; border-top: 1px solid rgba(150,220,255,0.16); text-align: center; font-size: 13px; color: #8fb4cd; }