:root {
  --page: #ffffff;
  --ink: #202124;
  --muted: #74767b;
  --soft: #a2a4a9;
  --line: rgba(25, 26, 29, .09);
  --red: #d34a42;
  --green: #22c875;
  --sans: "SF Pro Display", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; overflow-x: hidden; scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: #ffffff;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.page { width: min(1080px, calc(100% - 56px)); height: 100vh; height: 100svh; min-height: 600px; margin: 0 auto; display: flex; flex-direction: column; }
.header { flex: 0 0 72px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 650; letter-spacing: -.01em; }
.brand img { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 5px 14px rgba(99,42,37,.11); }
.header nav { display: flex; align-items: center; gap: 30px; color: #76787d; font-size: 12px; }
.header nav span { cursor: default; }
.header nav a { padding: 9px 14px; color: #fff; background: #25262a; border-radius: 999px; font-weight: 600; transition: transform .2s ease, background .2s ease; }
.header nav a:hover { transform: translateY(-1px); background: #090a0c; }

.hero { flex: 1; min-height: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 12px 0 18px; text-align: center; }
.logo-stage { position: relative; width: 128px; height: 128px; margin-bottom: 20px; }
.logo-stage::before { content: ""; position: absolute; inset: -30px; z-index: -1; background: radial-gradient(circle, rgba(211,74,66,.12), transparent 69%); filter: blur(8px); }
.logo-stage img { position: relative; z-index: 2; width: 128px; height: 128px; border-radius: 31px; box-shadow: 0 20px 48px rgba(36,37,42,.16), 0 2px 2px rgba(255,255,255,.8) inset; }
.logo-shadow { position: absolute; left: 19px; right: 19px; bottom: -27px; height: 36px; background: rgba(28,29,33,.18); border-radius: 50%; filter: blur(19px); }
.hero h1 { margin: 0; font-size: clamp(52px, 5.5vw, 68px); font-weight: 760; line-height: 1; letter-spacing: -.055em; }
.subtitle { margin: 15px 0 0; color: #3f4044; font-size: 18px; font-weight: 540; letter-spacing: -.02em; }
.description { margin: 11px 0 20px; color: var(--muted); font-size: 13px; line-height: 1.7; }

.wechat-card { display: flex; flex-direction: row; align-items: center; gap: 15px; width: 350px; padding: 12px; background: rgba(255,255,255,.86); border: 1px solid rgba(255,255,255,.95); border-radius: 22px; box-shadow: 0 20px 48px rgba(30,31,35,.1); backdrop-filter: blur(14px); transition: transform .25s ease, box-shadow .25s ease; }
.wechat-card:hover { transform: translateY(-3px); box-shadow: 0 28px 64px rgba(30,31,35,.15); }
.code-wrap { flex: 0 0 auto; width: 126px; height: 126px; padding: 4px; overflow: hidden; background: #fff; border: 1px solid #ececef; border-radius: 16px; }
.code-wrap img { width: 100%; height: 100%; object-fit: cover; object-position: center top; border-radius: 12px; }
.wechat-copy { display: flex; align-items: center; gap: 10px; width: auto; padding: 0; text-align: left; }
.wechat-copy strong { display: block; margin-bottom: 4px; font-size: 13px; }.wechat-copy small { display: block; color: var(--soft); font-size: 9px; }
.wechat-mark { position: relative; flex: 0 0 auto; width: 34px; height: 34px; background: var(--green); border-radius: 11px; }
.wechat-mark i, .wechat-mark b { position: absolute; background: #fff; border-radius: 50%; }
.wechat-mark i { width: 18px; height: 15px; left: 5px; top: 6px; }
.wechat-mark b { width: 15px; height: 12px; right: 4px; bottom: 5px; border: 2px solid var(--green); }
.wechat-mark::before, .wechat-mark::after { content: ""; position: absolute; z-index: 2; width: 2px; height: 2px; top: 11px; background: var(--green); border-radius: 50%; }
.wechat-mark::before { left: 10px; }.wechat-mark::after { left: 16px; }
.tip { margin: 11px 0 0; color: #a0a2a7; font-size: 9px; letter-spacing: .08em; }

.footer { flex: 0 0 50px; display: flex; align-items: center; justify-content: space-between; color: #a3a5a9; border-top: 1px solid var(--line); font-size: 9px; letter-spacing: .04em; }
.footer a { transition: color .2s ease; }.footer a:hover { color: #66686e; }
.icp-link { display: inline-flex; align-items: center; }

@media (max-width: 620px) {
  .page { width: min(100% - 32px, 480px); }
  .header { flex-basis: 62px; }.header nav span { display: none; }.header nav { gap: 0; }.header nav a { padding: 8px 12px; font-size: 10px; }
  .hero { padding: 8px 0 12px; }.logo-stage, .logo-stage img { width: 102px; height: 102px; }.logo-stage { margin-bottom: 16px; }.logo-stage img { border-radius: 25px; }
  .hero h1 { font-size: clamp(46px, 14vw, 58px); }.subtitle { margin-top: 11px; font-size: 15px; }.description { margin: 8px 0 14px; font-size: 11px; line-height: 1.55; }
  .wechat-card { width: min(318px, 100%); gap: 11px; padding: 9px; border-radius: 18px; }.code-wrap { width: 108px; height: 108px; border-radius: 13px; }.wechat-copy { gap: 8px; }.wechat-copy strong { font-size: 12px; }.wechat-copy small { font-size: 8px; }.wechat-mark { width: 30px; height: 30px; }
  .tip { margin-top: 8px; }
  .footer { flex-basis: 56px; flex-wrap: wrap; justify-content: center; column-gap: 18px; row-gap: 5px; padding: 9px 0; }.footer a { order: 3; flex-basis: 100%; justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; }
}