/* SnoreTrack — 站点样式。通透浅色底 + 绿蓝声波点缀；品牌深蓝作文字色。 */
:root {
  --bg: #f6f8fc;
  --bg-soft: #eef2f9;
  --ink: #16203a;          /* 品牌深蓝：用作文字色 */
  --muted: #55618a;
  --faint: #8a93b3;
  --line: rgba(22, 32, 60, 0.10);
  --card: #ffffff;
  --green: #10b981;
  --blue: #3b7ff0;
  --accent: linear-gradient(120deg, #10b981 0%, #3b7ff0 100%);
  --icon: #1f9bb0;
  --shadow: 0 1px 2px rgba(22, 32, 60, 0.05), 0 8px 24px rgba(22, 32, 60, 0.06);
  --maxw: 940px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1100px 620px at 50% -8%, rgba(59, 127, 240, 0.10) 0%, rgba(59, 127, 240, 0) 60%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 30%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---- header ---- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(140%) blur(12px);
  background: rgba(246, 248, 252, 0.72);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 650; letter-spacing: -0.01em; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 8px; display: block; }
.brand span { font-size: 17px; }
.nav { display: flex; gap: 22px; font-size: 14.5px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--ink); text-decoration: none; }

.langbar { display: flex; gap: 14px; font-size: 14px; align-items: center; }
.langbar a { color: var(--muted); }
.langbar a:hover { color: var(--ink); text-decoration: none; }
.langbar .cur { color: var(--ink); font-weight: 600; }

/* ---- hero ---- */
.hero { padding: 78px 0 34px; text-align: center; }
.wave { width: 100%; max-width: 460px; height: auto; margin: 0 auto 30px; display: block; }
.hero h1 {
  font-size: clamp(34px, 6.2vw, 58px);
  line-height: 1.06; letter-spacing: -0.03em; font-weight: 720;
  margin: 0 0 18px;
}
.grad { background: var(--accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { font-size: clamp(16px, 2.4vw, 19px); color: var(--muted); max-width: 560px; margin: 0 auto 30px; }

.badge {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 11px 20px; font-size: 14.5px; color: var(--ink);
  background: var(--card); box-shadow: var(--shadow);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

/* ---- features ---- */
.section { padding: 46px 0; }
.eyebrow { font-size: 12.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin: 0 0 26px; text-align: center; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  border: 1px solid var(--line); border-radius: 16px; padding: 26px 24px;
  background: var(--card); box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .ic { width: 30px; height: 30px; margin-bottom: 14px; display: block; stroke: var(--icon); }

.closing { text-align: center; padding: 60px 0 30px; }
.closing p { font-size: clamp(20px, 3.2vw, 27px); letter-spacing: -0.02em; color: var(--ink); max-width: 620px; margin: 0 auto; line-height: 1.35; }

/* ---- legal / text pages ---- */
.doc { padding: 54px 0 20px; max-width: 760px; }
.doc h1 { font-size: clamp(28px, 5vw, 40px); letter-spacing: -0.025em; margin: 0 0 8px; }
.doc .updated { color: var(--faint); font-size: 14px; margin: 0 0 34px; }
.doc h2 { font-size: 20px; letter-spacing: -0.01em; margin: 34px 0 10px; }
.doc p, .doc li { color: #37415f; font-size: 15.5px; }
.doc ul { padding-left: 20px; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--ink); }
.mail {
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px;
  background: var(--card); box-shadow: var(--shadow); font-size: 16px; color: var(--ink); margin: 8px 0 4px;
}
.mail:hover { text-decoration: none; border-color: rgba(59, 127, 240, 0.5); }

.faq { border-top: 1px solid var(--line); margin-top: 30px; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 2px; }
.faq summary { cursor: pointer; font-size: 16px; color: var(--ink); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; color: var(--blue); margin-right: 12px; font-weight: 600; }
.faq details[open] summary::before { content: "–"; }
.faq p { margin: 12px 0 2px; color: var(--muted); font-size: 15px; }

/* ---- footer ---- */
.site-foot { border-top: 1px solid var(--line); margin-top: 40px; padding: 30px 0 46px; color: var(--faint); font-size: 14px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; justify-content: space-between; }
.site-foot a { color: var(--muted); }
.site-foot .links { display: flex; gap: 22px; }

@media (max-width: 620px) {
  .grid { grid-template-columns: 1fr; }
  .nav { gap: 16px; }
  .hero { padding: 54px 0 20px; }
  .site-foot .wrap { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .wave path.pulse { animation: none !important; }
}