:root {
  --bg: #0b0b0f;
  --bg-soft: #14141b;
  --card: #1a1a23;
  --line: #2a2a36;
  --text: #ececf1;
  --muted: #9a9aa8;
  --brand: #ff7a18;
  --brand-soft: #ffb066;
  --glow: rgba(255, 122, 24, 0.55);
  --radius: 18px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(255, 122, 24, 0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand-soft); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 11, 15, 0.82);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 66px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 40px; height: 40px; border-radius: 11px;
  background: #000;
  display: grid; place-items: center;
  font-weight: 800; font-size: 22px; color: var(--brand);
  box-shadow: 0 0 0 1px #2c2c2c inset, 0 0 18px var(--glow);
  text-shadow: 0 0 10px var(--glow);
}
.brand-name { font-weight: 700; letter-spacing: .5px; }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding: 84px 0 56px; text-align: center; }
.hero .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 2px;
  color: var(--brand-soft); text-transform: uppercase; margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 52px); line-height: 1.15; margin: 0 0 16px;
  font-weight: 800;
}
.hero h1 .accent { color: var(--brand); text-shadow: 0 0 26px var(--glow); }
.hero p.lead { color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 auto 28px; }

.cta {
  display: inline-flex; align-items: center; gap: 10px;
  background: linear-gradient(180deg, var(--brand-soft), var(--brand));
  color: #1a0e03; font-weight: 700; padding: 13px 26px; border-radius: 999px;
  box-shadow: 0 8px 30px rgba(255, 122, 24, 0.35);
}
.cta:hover { text-decoration: none; filter: brightness(1.05); }

/* Sections */
section { padding: 56px 0; }
.section-title { text-align: center; font-size: clamp(22px, 3vw, 30px); margin: 0 0 10px; font-weight: 800; }
.section-sub { text-align: center; color: var(--muted); margin: 0 0 36px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.card .ico {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: rgba(255, 122, 24, 0.12); color: var(--brand); font-size: 16px;
}
.card p { color: var(--muted); margin: 0; font-size: 15px; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; margin-bottom: 12px;
}
.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--brand); font-weight: 700; }
.faq details[open] summary::after { content: "−"; }
.faq p { color: var(--muted); margin: 12px 0 0; font-size: 15px; }

/* Contact box */
.contact-box {
  background: linear-gradient(180deg, rgba(255,122,24,.08), transparent);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; text-align: center; max-width: 720px; margin: 0 auto;
}
.contact-box .mail { font-size: 22px; font-weight: 700; color: var(--brand-soft); }

/* Privacy */
.doc { max-width: 820px; margin: 0 auto; }
.doc h2 { font-size: 22px; margin: 32px 0 10px; }
.doc h2:first-child { margin-top: 0; }
.doc p, .doc li { color: var(--muted); }
.doc ul { padding-left: 20px; }
.doc strong { color: var(--text); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 30px 0; color: var(--muted); font-size: 14px;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center; }
.site-footer .links { display: flex; gap: 18px; }

.tag-note {
  display: inline-block; font-size: 12px; color: var(--muted);
  border: 1px dashed var(--line); border-radius: 8px; padding: 4px 10px; margin-top: 10px;
}

@media (max-width: 600px) {
  .nav { gap: 14px; font-size: 14px; }
  .hero { padding: 56px 0 40px; }
}

/* ---------- Doc pages (privacy / agreement / manual / permissions / lists) ---------- */
.doc { max-width: 860px; margin: 0 auto; padding: 40px 22px 64px; }
.doc h1 { font-size: 30px; margin: 6px 0 4px; font-weight: 800; }
.doc .meta { color: var(--muted); font-size: 13px; margin-bottom: 26px; }
.doc h2 { font-size: 19px; margin: 34px 0 10px; padding-left: 11px; border-left: 4px solid var(--brand); }
.doc h3 { font-size: 16px; margin: 22px 0 6px; color: var(--text); }
.doc p { color: var(--muted); }
.doc ul, .doc ol { padding-left: 22px; margin: 10px 0; }
.doc li { color: var(--muted); margin: 6px 0; }
.doc strong { color: var(--text); }
.doc a { color: var(--brand-soft); }
.doc table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; color: var(--muted); }
.doc th { background: var(--bg-soft); color: var(--text); font-weight: 600; }
.doc .card {
  background: rgba(255, 122, 24, .08); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; margin: 18px 0; font-size: 14px; color: var(--brand-soft);
}
.doc .toc { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; margin: 18px 0 28px; font-size: 14px; }
.doc .toc a { color: var(--muted); display: block; padding: 3px 0; }
.doc .toc a:hover { color: var(--text); text-decoration: none; }
.doc code { background: var(--bg-soft); border-radius: 5px; padding: 1px 6px; font-family: ui-monospace, Menlo, monospace; font-size: 13px; color: var(--brand-soft); }
.doc .step { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; margin: 14px 0; color: var(--muted); }
.doc .step .n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--brand); color: #1a0e03; font-size: 13px; font-weight: 700; margin-right: 8px;
}
.doc .step b { color: var(--text); font-weight: 700; }
.doc .doc-footer { margin-top: 44px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.7; }
.doc .doc-footer a { color: var(--brand-soft); }