:root {
  --bg: #0b0c1a;
  --bg2: #15142e;
  --fg: #f4f4fb;
  --muted: rgba(244, 244, 251, 0.66);
  --faint: rgba(244, 244, 251, 0.12);
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #8c9bff;
  --accent2: #c4a6ff;
  --mint: #6fe3b8;
  --radius: 22px;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg2); }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "PingFang TC", "Hiragino Sans", "Apple SD Gothic Neo", "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(140, 155, 255, 0.28), transparent 60%),
    radial-gradient(900px 600px at -10% 20%, rgba(196, 166, 255, 0.20), transparent 60%),
    radial-gradient(900px 600px at 50% 110%, rgba(111, 227, 184, 0.12), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  background-repeat: no-repeat;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  background: rgba(11, 12, 26, 0.55);
  border-bottom: 1px solid var(--faint);
}
.nav .wrap { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 800; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.nav .links { margin-left: auto; display: flex; gap: 18px; align-items: center; font-size: 14px; }
.nav .links a { color: var(--muted); }
.nav .links a:hover { color: var(--fg); text-decoration: none; }
.lang {
  appearance: none; -webkit-appearance: none;
  background: var(--card); color: var(--fg); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 28px 6px 12px; font-size: 13px; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23ccc' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}

/* 首屏 */
.hero { padding: 80px 0 40px; text-align: center; }
.hero .icon { display: block; margin: 0 auto; width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 20px 60px rgba(140, 155, 255, 0.35); }
.eyebrow { display: inline-block; margin-top: 26px; font-size: 13px; font-weight: 700; letter-spacing: .08em; color: var(--accent2); text-transform: uppercase; }
h1 { font-size: clamp(38px, 6vw, 68px); line-height: 1.08; margin: 10px 0 16px; letter-spacing: -0.02em; }
.grad { background: linear-gradient(90deg, var(--mint), var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(17px, 2vw, 21px); color: var(--muted); max-width: 720px; margin: 0 auto 30px; }
.cta { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 24px; border-radius: 16px;
  font-weight: 700; font-size: 16px; color: #0b0c1a; background: #fff;
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.12);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.ghost { background: var(--card); color: var(--fg); border: 1px solid var(--border); box-shadow: none; }
.btn svg { width: 20px; height: 20px; }
.note { font-size: 13px; color: var(--muted); margin-top: 14px; }

/* 截图滚动条 */
.shots { display: flex; gap: 18px; overflow-x: auto; padding: 30px 24px 40px; scroll-snap-type: x mandatory; max-width: var(--max); margin: 0 auto; }
.shots img { height: 560px; width: auto; border-radius: 26px; scroll-snap-align: center; box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45); flex: 0 0 auto; }
.shots::-webkit-scrollbar { height: 6px; }
.shots::-webkit-scrollbar-thumb { background: var(--faint); border-radius: 3px; }

/* 区块 */
section { padding: 60px 0; }
h2 { font-size: clamp(28px, 4vw, 42px); line-height: 1.15; margin: 0 0 14px; letter-spacing: -0.01em; }
.sub { color: var(--muted); font-size: 18px; margin: 0 0 34px; max-width: 760px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.card .ic { font-size: 28px; line-height: 1; }
.card h3 { margin: 14px 0 6px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.duo { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; align-items: center; }
.duo img { width: 100%; border-radius: 22px; box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5); }
@media (max-width: 860px) { .duo { grid-template-columns: 1fr; } .shots img { height: 460px; } }
.pills { display: flex; flex-wrap: wrap; gap: 10px; }
.pill { padding: 8px 14px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); font-size: 14px; }

/* 文档页 */
.doc { padding: 50px 0 80px; }
.doc h1 { font-size: clamp(32px, 5vw, 48px); }
.doc h2 { font-size: 24px; margin-top: 40px; }
.doc p, .doc li { color: var(--muted); font-size: 16px; }
.doc strong { color: var(--fg); }
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px 20px; margin-bottom: 12px; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 17px; color: var(--fg); }
.faq details p, .faq details ol { margin: 12px 0 0; }
.mail { display: inline-block; margin-top: 8px; font-size: 18px; font-weight: 700; }

footer { border-top: 1px solid var(--faint); padding: 30px 0 50px; color: var(--muted); font-size: 13px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
footer .links { margin-left: auto; display: flex; gap: 18px; }
footer a { color: var(--muted); }

@media (max-width: 600px) {
  .nav .wrap { gap: 10px; padding: 0 16px; }
  .nav .links { gap: 12px; font-size: 13px; }
  .nav .links a[href$="#features"] { display: none; }
  .brand { font-size: 16px; }
  .lang { padding: 5px 24px 5px 10px; font-size: 12px; }
  .hero { padding-top: 50px; }
  .shots { padding: 20px 16px 30px; gap: 12px; }
  .shots img { height: 420px; border-radius: 20px; }
  footer .links { margin-left: 0; }
}