/* TidyC 官网共享样式 — 与应用 §4 设计 token 同源 */
:root {
  --surface-base: #131313;
  --surface-low: #1B1B1C;
  --surface-container: #202021;
  --surface-high: #2B2B2C;
  --surface-highest: #363637;
  --primary: #0078D4;
  --primary-hover: #1084D9;
  --info-blue: #4CC2FF;
  --risk-safe: #107C41;
  --risk-safe-light: #27C268;
  --risk-caution: #D83B01;
  --risk-warm: #FFB900;
  --risk-preserve: #E81123;
  --risk-unknown: #8A8886;
  --text-primary: #FFFFFF;
  --text-secondary: #CCCCCC;
  --text-tertiary: #8C8C8C;
  --border-subtle: #2E2E30;
  --border-strong: #444446;
  --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--surface-base);
  color: var(--text-primary);
  font-family: "Segoe UI Variable Display", "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

code, .mono { font-family: Consolas, "Cascadia Code", monospace; }

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

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ── 导航 ── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 14, 14, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 16px; color: var(--text-primary); }
.brand img { width: 26px; height: 26px; border-radius: 6px; display: block; }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-secondary); font-size: 13.5px; }
.nav-links a:hover { color: var(--text-primary); text-decoration: none; }

/* ── 按钮 ── */
.btn {
  display: inline-block; padding: 11px 22px; border-radius: 5px;
  font-weight: 600; font-size: 14px; cursor: pointer; border: none;
  transition: background .15s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-ghost {
  background: var(--surface-high); color: var(--text-secondary);
  border: 1px solid var(--border-subtle); padding: 10px 20px;
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--border-strong); text-decoration: none; }
.btn-safe { background: var(--risk-safe); color: #fff; }
.btn-safe:hover { background: var(--risk-safe-light); text-decoration: none; }
.btn-lg { padding: 14px 30px; font-size: 15px; }

/* ── Hero ── */
.hero { padding: 96px 0 72px; text-align: center; background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0, 120, 212, 0.10), transparent); }
.badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 30px; }
.badge {
  font-size: 12px; padding: 5px 12px; border-radius: 4px;
  font-family: Consolas, monospace; letter-spacing: .3px;
}
.badge-blue { background: rgba(0, 120, 212, 0.14); color: var(--info-blue); border: 1px solid rgba(0, 120, 212, 0.35); }
.badge-green { background: rgba(16, 124, 65, 0.14); color: var(--risk-safe-light); border: 1px solid rgba(16, 124, 65, 0.4); }
.badge-gray { background: rgba(139, 139, 134, 0.12); color: var(--text-secondary); border: 1px solid var(--border-subtle); }
.hero h1 { font-size: 44px; line-height: 1.25; font-weight: 700; letter-spacing: .5px; }
.hero .sub { margin: 20px auto 8px; font-size: 18px; color: var(--text-secondary); max-width: 640px; }
.hero .sub2 { font-size: 13px; color: var(--text-tertiary); }
.cta-row { display: flex; gap: 14px; justify-content: center; margin-top: 34px; flex-wrap: wrap; }
.cta-note { margin-top: 14px; font-size: 12px; color: var(--text-tertiary); font-family: Consolas, monospace; }

/* ── 区块 ── */
section { padding: 64px 0; }
section.mist { background: var(--surface-low); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.section-title { text-align: center; font-size: 28px; font-weight: 700; margin-bottom: 10px; }
.section-sub { text-align: center; color: var(--text-tertiary); font-size: 14px; margin-bottom: 44px; }

/* ── 卡片网格 ── */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  background: var(--surface-container); border: 1px solid var(--border-subtle);
  border-radius: var(--radius); padding: 24px 22px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.card .icon {
  width: 42px; height: 42px; border-radius: 9px; background: var(--surface-high);
  display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 14px;
}
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card p { font-size: 13.5px; color: var(--text-tertiary); }

/* ── 截图 ── */
.shot {
  border: 1px solid var(--border-subtle); border-radius: 10px; overflow: hidden;
  background: var(--surface-container-lowest);
}
.shot img { display: block; width: 100%; height: auto; }
.shot-cap { padding: 12px 16px; font-size: 12.5px; color: var(--text-tertiary); border-top: 1px solid var(--border-subtle); font-family: Consolas, monospace; }
.shots { display: grid; gap: 18px; margin-top: 40px; }

/* ── 风险模型 ── */
.risk-tag {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 1px;
  padding: 3px 10px; border-radius: 3px; margin-bottom: 12px; font-family: Consolas, monospace;
}
.risk-green { background: rgba(16, 124, 65, .18); color: var(--risk-safe-light); }
.risk-yellow { background: rgba(255, 185, 0, .14); color: var(--risk-warm); }
.risk-red { background: rgba(232, 17, 35, .16); color: #FF6B6B; }
.risk-gray { background: rgba(138, 136, 134, .16); color: var(--risk-unknown); }

/* ── 红线 ── */
.redline { border-left: 3px solid var(--risk-preserve); padding-left: 16px; }
.redline .no { font-size: 11px; color: var(--risk-preserve); font-family: Consolas, monospace; letter-spacing: 2px; }
.redline h3 { font-size: 15px; margin: 4px 0 6px; }
.redline p { font-size: 13px; color: var(--text-tertiary); }

/* ── 规格 ── */
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-table td { padding: 11px 14px; border-bottom: 1px solid var(--border-subtle); }
.spec-table td:first-child { color: var(--text-tertiary); width: 200px; }
.spec-table td:last-child { color: var(--text-secondary); font-family: Consolas, monospace; }

/* ── 发布页 ── */
.release-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.version-pill {
  font-family: Consolas, monospace; font-size: 13px; color: var(--info-blue);
  background: rgba(0, 120, 212, .14); border: 1px solid rgba(0, 120, 212, .35);
  padding: 3px 12px; border-radius: 4px;
}
.date { color: var(--text-tertiary); font-size: 13px; }

.dl-card {
  display: flex; align-items: center; gap: 20px;
  background: var(--surface-container); border: 1px solid var(--border-subtle);
  border-radius: var(--radius); padding: 22px 24px; margin-bottom: 14px;
}
.dl-card.recommend { border-color: rgba(16, 124, 65, .5); background: rgba(16, 124, 65, .06); }
.dl-icon { font-size: 30px; }
.dl-info { flex: 1; }
.dl-info h3 { font-size: 16px; }
.dl-info .meta { font-size: 12.5px; color: var(--text-tertiary); font-family: Consolas, monospace; margin-top: 4px; }
.dl-info .desc { font-size: 13px; color: var(--text-secondary); margin-top: 6px; }
.recommend-pill {
  font-size: 11px; color: var(--risk-safe-light); background: rgba(16, 124, 65, .18);
  padding: 2px 8px; border-radius: 3px; margin-left: 8px; font-weight: 600; vertical-align: 2px;
}
.sha {
  font-family: Consolas, monospace; font-size: 11.5px; color: var(--text-tertiary);
  background: var(--surface-base); border: 1px solid var(--border-subtle);
  border-radius: 4px; padding: 6px 10px; margin-top: 10px; word-break: break-all;
}
.cmd {
  background: var(--surface-base); border: 1px solid var(--border-subtle); border-radius: 6px;
  padding: 12px 16px; font-family: Consolas, monospace; font-size: 12.5px;
  color: var(--text-secondary); overflow-x: auto; white-space: pre; margin: 10px 0;
}

.changelog li { margin: 8px 0 8px 18px; color: var(--text-secondary); font-size: 13.5px; }
.faq-item { margin-bottom: 18px; }
.faq-item h4 { font-size: 14.5px; color: var(--text-primary); margin-bottom: 5px; }
.faq-item p { font-size: 13px; color: var(--text-tertiary); }

/* ── 页脚 ── */
footer { border-top: 1px solid var(--border-subtle); padding: 30px 0 40px; margin-top: 40px; }
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--text-tertiary); font-size: 12.5px; }
.foot a { color: var(--text-tertiary); }

@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .nav-links a:not(.btn) { display: none; }
  .dl-card { flex-direction: column; align-items: flex-start; }
}