/* 智客秒触AI 官网样式（纯静态，无外部依赖） */
:root {
  --bg: #0a1016;
  --bg-2: #0f171f;
  --surface: #131d27;
  --surface-2: #18242f;
  --line: #23323f;
  --text: #e8f0f5;
  --text-2: #93a5b4;
  --accent: #23d3a6;
  --accent-2: #35b8ff;
  --accent-dark: #0f9c78;
  --warn: #ffcf5c;
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1080px;
  --shadow: 0 12px 32px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶栏 ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 16, 22, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

header.site .bar {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.brand:hover { text-decoration: none; }

nav.top { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
nav.top a {
  color: var(--text-2);
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 15px;
}
nav.top a:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
nav.top a.on { color: #04231b; background: var(--accent); font-weight: 700; }

/* ---------- 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: filter .15s ease, background .15s ease;
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #04231b; }
.btn.ghost { border-color: var(--line); color: var(--text); background: var(--surface); }
.btn.block { width: 100%; }

/* ---------- 通用块 ---------- */
section { padding: 68px 0; }
section.tight { padding: 44px 0; }

h1, h2, h3 { line-height: 1.3; margin: 0 0 14px; }
h1 { font-size: 42px; letter-spacing: -.5px; }
h2 { font-size: 29px; }
h3 { font-size: 18px; margin-bottom: 8px; }
p { margin: 0 0 14px; color: var(--text-2); }
p.lead { font-size: 17.5px; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 1.5px;
  color: var(--accent);
  background: rgba(35, 211, 166, .1);
  border: 1px solid rgba(35, 211, 166, .28);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

/* ---------- 首屏 ---------- */
.hero {
  padding: 84px 0 64px;
  background:
    radial-gradient(760px 340px at 12% -8%, rgba(35, 211, 166, .17), transparent 70%),
    radial-gradient(680px 320px at 92% 4%, rgba(53, 184, 255, .14), transparent 70%);
}
.hero h1 span {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.hero .note { font-size: 14px; color: var(--text-2); margin-top: 18px; }

.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.card.hover:hover { border-color: rgba(35, 211, 166, .45); }
.card p:last-child { margin-bottom: 0; }

.icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(35, 211, 166, .12);
  color: var(--accent);
  font-size: 20px;
  margin-bottom: 14px;
  font-weight: 700;
}

.steps { counter-reset: s; }
.step { position: relative; padding-left: 62px; }
.step::before {
  counter-increment: s;
  content: counter(s);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04231b;
  font-weight: 700;
  display: grid;
  place-items: center;
}

/* ---------- 下载页 ---------- */
.dlbox {
  background: linear-gradient(150deg, rgba(35, 211, 166, .1), rgba(53, 184, 255, .07));
  border: 1px solid rgba(35, 211, 166, .3);
  border-radius: 20px;
  padding: 34px;
  text-align: center;
}
.dlbox .file { color: var(--text-2); font-size: 15px; margin: 12px 0 0; word-break: break-all; }

.notice {
  border-left: 3px solid var(--warn);
  background: rgba(255, 207, 92, .07);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin: 0 0 14px;
}
.notice strong { color: var(--warn); }
.notice p { margin: 6px 0 0; }

.notice.info { border-color: var(--accent-2); background: rgba(53, 184, 255, .07); }
.notice.info strong { color: var(--accent-2); }

.kv { list-style: none; padding: 0; margin: 0; }
.kv li { display: flex; gap: 16px; padding: 11px 0; border-top: 1px solid var(--line); font-size: 15px; }
.kv li:first-child { border-top: 0; }
.kv li span:first-child { color: var(--text-2); flex: 0 0 104px; }

details.faq {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 15px 18px;
  margin-bottom: 10px;
}
details.faq summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::before { content: "＋ "; color: var(--accent); }
details.faq[open] summary::before { content: "－ "; }
details.faq p { margin: 10px 0 0; font-size: 15px; }

ul.ticks { list-style: none; padding: 0; margin: 0 0 14px; }
ul.ticks li { position: relative; padding-left: 26px; margin-bottom: 9px; color: var(--text-2); }
ul.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ---------- 页脚 ---------- */
footer.site {
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding: 34px 0;
  font-size: 14.5px;
}
footer.site .cols { display: flex; gap: 30px; flex-wrap: wrap; justify-content: space-between; }
footer.site a { color: var(--text-2); }
footer.site a:hover { color: var(--accent); }
footer.site .fine { color: #6c7d8b; font-size: 13px; margin-top: 16px; line-height: 1.9; }

/* ---------- 自适应 ---------- */
@media (max-width: 980px) {
  .grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid.three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  section { padding: 50px 0; }
  .hero { padding: 56px 0 40px; }
  .grid.two, .grid.three, .grid.four { grid-template-columns: minmax(0, 1fr); }
  nav.top { width: 100%; margin: 6px 0 0; }
  header.site .bar { flex-wrap: wrap; }
  .dlbox { padding: 24px 18px; }
}