:root {
  --bg: #060b16;
  --bg-2: #0a1324;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-2: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.09);
  --text: #eaf2ff;
  --muted: #8d9bb4;
  --dim: #5f6d86;
  --cyan: #00e5ff;
  --cyan-ink: #003845;
  --gold: #ffb020;
  --radius: 18px;
  --wrap: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ── 顶栏 ── */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(6, 11, 22, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; height: 64px; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; letter-spacing: 0.5px; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand span {
  background: linear-gradient(120deg, #fff 10%, var(--cyan) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav-links { display: flex; gap: 26px; margin-left: auto; font-size: 15px; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.nav .btn { padding: 8px 18px; font-size: 14px; }

/* ── 按钮 ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-size: 16px; font-weight: 700;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary { background: var(--cyan); color: var(--cyan-ink); box-shadow: 0 8px 28px rgba(0, 229, 255, 0.28); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 34px rgba(0, 229, 255, 0.4); }
.btn-ghost { border-color: var(--line); color: var(--text); background: var(--panel); }
.btn-ghost:hover { background: var(--panel-2); }
.btn[aria-disabled="true"] { color: var(--dim); cursor: default; pointer-events: none; }

/* ── 首屏 ── */
.hero { position: relative; padding: 72px 0 96px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto auto; width: 760px; height: 760px;
  background: radial-gradient(closest-side, rgba(0, 229, 255, 0.16), transparent 70%);
  pointer-events: none;
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: center; gap: 48px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--cyan); font-weight: 600; letter-spacing: 1px; }
.eyebrow::before { content: ""; width: 18px; height: 2px; background: var(--cyan); border-radius: 2px; }
.hero h1 { font-size: clamp(36px, 5.4vw, 60px); line-height: 1.18; margin: 18px 0 20px; font-weight: 900; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--cyan); }
.hero p.lead { font-size: 18px; color: var(--muted); max-width: 520px; margin: 0 0 34px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.cta-meta { margin-top: 18px; font-size: 13px; color: var(--dim); }
.hero-qr { display: flex; align-items: center; gap: 14px; margin-top: 30px; padding: 12px 16px 12px 12px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); width: fit-content; }
.hero-qr img { width: 84px; height: 84px; border-radius: 8px; background: #fff; padding: 5px; }
.hero-qr div { font-size: 13px; color: var(--muted); line-height: 1.6; }
.hero-qr strong { display: block; color: var(--text); font-size: 15px; }

/* ── 手机样机 ── */
.phone {
  position: relative; width: 300px; aspect-ratio: 9 / 19.5; margin: 0 auto;
  border-radius: 46px; padding: 11px; background: #111827;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 40px 90px rgba(0, 0, 0, 0.6), 0 0 80px rgba(0, 229, 255, 0.12);
}
.phone .screen { position: relative; width: 100%; height: 100%; border-radius: 36px; overflow: hidden; background: #0b1426 center/cover no-repeat; }
.phone .screen::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(6,11,22,.55) 0%, transparent 22%, transparent 45%, rgba(6,11,22,.92) 78%); }
.app-bar { position: absolute; z-index: 2; top: 0; left: 0; right: 0; display: flex; align-items: center; gap: 10px; padding: 34px 16px 12px; background: linear-gradient(rgba(6,11,22,.92), rgba(6,11,22,.7)); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255,255,255,.06); }
.app-bar .logo { font-weight: 900; font-size: 16px; background: linear-gradient(120deg, #fff, var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.pill { display: flex; padding: 3px; border-radius: 999px; background: rgba(255,255,255,0.12); font-size: 11px; font-weight: 700; }
.pill b { padding: 3px 11px; border-radius: 999px; background: var(--cyan); color: var(--cyan-ink); }
.pill i { padding: 3px 11px; font-style: normal; color: rgba(255,255,255,0.7); }
.choice { position: absolute; z-index: 2; left: 14px; right: 14px; bottom: 22px; }
.choice small { display: inline-block; font-size: 10px; font-weight: 700; color: var(--cyan-ink); background: var(--cyan); padding: 1px 8px; border-radius: 6px; }
.choice h4 { margin: 8px 0 10px; font-size: 14px; line-height: 1.45; }
.choice a { display: flex; align-items: center; gap: 8px; padding: 9px 12px; margin-top: 8px; border-radius: 12px; font-size: 12.5px; font-weight: 600; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.14); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.choice a.on { background: rgba(0, 229, 255, 0.18); border-color: rgba(0, 229, 255, 0.7); }
.choice a span { flex: none; width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; background: rgba(255,255,255,0.16); }
.choice a.on span { background: var(--cyan); color: var(--cyan-ink); }

/* ── 通用分区 ── */
section { padding: 96px 0; }
section.alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.head { max-width: 640px; margin-bottom: 52px; }
.head h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.3; margin: 12px 0 14px; font-weight: 900; }
.head p { color: var(--muted); margin: 0; font-size: 17px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.step { padding: 28px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); }
.step::before { counter-increment: step; content: "0" counter(step); display: block; font-size: 34px; font-weight: 900; color: var(--cyan); opacity: 0.85; margin-bottom: 10px; }
.step h3 { margin: 0 0 8px; font-size: 20px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.scene { position: relative; border-radius: 24px; overflow: hidden; border: 1px solid var(--line); aspect-ratio: 920 / 1000; background: #0b1426 center/cover no-repeat; }
.scene::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 40%, rgba(6,11,22,.9) 100%); }
.scene .choice { left: 22px; right: 22px; bottom: 24px; }
.scene .choice h4 { font-size: 17px; }
.scene .choice a { font-size: 14px; padding: 11px 14px; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card { padding: 26px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); }
.card .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(0, 229, 255, 0.1); color: var(--cyan); margin-bottom: 16px; }
.card .ic svg { width: 22px; height: 22px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

.checks { list-style: none; padding: 0; margin: 0 0 34px; display: grid; gap: 14px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; color: var(--text); }
.checks li::before { content: ""; flex: none; width: 20px; height: 20px; margin-top: 3px; border-radius: 50%; background: rgba(0,229,255,.14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='%2300E5FF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat; }
.creator-panel { padding: 30px; border-radius: 24px; background: linear-gradient(160deg, rgba(0,229,255,.1), rgba(255,255,255,.02)); border: 1px solid var(--line); }
.flow { display: grid; gap: 12px; }
.flow div { display: flex; align-items: center; gap: 14px; padding: 14px 16px; border-radius: 14px; background: rgba(6,11,22,.55); border: 1px solid var(--line); font-size: 15px; }
.flow b { flex: none; width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--cyan); color: var(--cyan-ink); font-size: 13px; }
.flow span { color: var(--muted); font-size: 13px; margin-left: auto; text-align: right; }

.download { text-align: center; }
.download .box { max-width: 760px; margin: 0 auto; padding: 48px 32px; border-radius: 28px; background: radial-gradient(120% 140% at 50% 0%, rgba(0,229,255,.14), transparent 60%), var(--bg-2); border: 1px solid var(--line); }
.download .appicon { width: 88px; height: 88px; border-radius: 22px; margin: 0 auto 18px; box-shadow: 0 12px 40px rgba(0,0,0,.5); }
.download h2 { font-size: clamp(26px, 3.4vw, 36px); margin: 0 0 8px; font-weight: 900; }
.download p { color: var(--muted); margin: 0 0 28px; }
.download .cta { justify-content: center; }
.download .qr { margin: 30px auto 0; display: inline-flex; flex-direction: column; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.download .qr img { width: 132px; height: 132px; background: #fff; padding: 8px; border-radius: 12px; }
.tip { margin-top: 18px; font-size: 13px; color: var(--dim); }

/* ── 页脚 ── */
footer { padding: 48px 0 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
footer h5 { margin: 0 0 12px; font-size: 14px; color: var(--text); }
footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
footer a:hover { color: var(--text); }
.legal-line { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px 18px; padding-top: 22px; margin-top: 8px; border-top: 1px solid var(--line); color: var(--dim); font-size: 13px; }
.legal-line img { display: inline-block; width: 14px; height: 14px; vertical-align: -2px; margin-right: 4px; }

/* ── 协议页 ── */
.doc { padding: 56px 0 88px; }
.doc .wrap { max-width: 860px; }
.doc h1 { font-size: clamp(28px, 4vw, 38px); margin: 0 0 8px; }
.doc .meta { color: var(--dim); font-size: 14px; margin-bottom: 32px; }
.doc .intro { padding: 18px 20px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); color: var(--muted); font-size: 15px; }
.doc h2 { font-size: 21px; margin: 40px 0 12px; padding-top: 8px; }
.doc h3 { font-size: 17px; margin: 24px 0 8px; }
.doc p, .doc li { color: #c6d1e3; font-size: 15.5px; }
.doc ul, .doc ol { padding-left: 1.3em; }
.doc li { margin: 4px 0; }
.doc strong { color: var(--text); }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0 8px; font-size: 14px; display: block; overflow-x: auto; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border: 1px solid var(--line); color: #c6d1e3; min-width: 110px; }
.doc th { background: var(--panel-2); color: var(--text); font-weight: 600; }
.doc .toc { margin: 24px 0 8px; padding: 16px 20px; border-radius: 14px; border: 1px dashed var(--line); }
.doc .toc ol { margin: 0; columns: 2; column-gap: 32px; }
.doc .toc a { color: var(--cyan); }

/* App 内嵌协议页 */
.embed .nav, .embed footer { display: none !important; }
.embed .doc { padding: 20px 0 40px; }

/* ── 响应式 ── */
@media (max-width: 960px) {
  .hero .wrap, .split { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 72px; }
  .steps { grid-template-columns: 1fr; }
  footer .wrap { grid-template-columns: 1fr 1fr; }
  footer .wrap > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .nav-links { display: none; }
  .nav .btn { margin-left: auto; }
  section { padding: 68px 0; }
  .cards { grid-template-columns: 1fr; }
  .phone { width: 260px; }
  .hero-qr, .download .qr { display: none; }
  .hero p.lead { font-size: 16px; }
  .cta .btn { flex: 1 1 100%; }
  .doc .toc ol { columns: 1; }
  .doc table { font-size: 13px; }
  .doc th, .doc td { min-width: 0; padding: 8px; }
  .flow span { display: none; }
}
@media (hover: none) { .hero-qr, .download .qr { display: none; } }