/* MySkill-Signature · 产品页
 * 纯静态、零依赖、零构建 —— CF Pages 直接托管这个目录即可。
 * 配色与看板卡片同源：主色 #1D4ED8（卡片 accent）。
 */

:root {
  --ink: #0f172a;
  --ink-2: #475569;
  --ink-3: #8b97ab;
  --line: #e3e8f0;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --accent: #1d4ed8;
  --accent-2: #3b82f6;
  --accent-soft: #eff4ff;
  --paper: #e9eef8; /* 演示用「有底色的纸」——白底图贴上去才看得出白块 */
  --radius: 16px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 页头 ---------- */
.top {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
}

.top-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.brand img { width: 28px; height: 28px; border-radius: 8px; display: block; }

.top-spacer { flex: 1; }

.top-link {
  font-size: 14px;
  color: var(--ink-2);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  transition: border-color 0.15s, color 0.15s;
}

.top-link:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 72px 0 64px;
}

h1 {
  font-size: clamp(30px, 4.2vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  font-weight: 800;
}

h1 em {
  font-style: normal;
  color: var(--accent);
}

.lede {
  font-size: 17px;
  color: var(--ink-2);
  margin: 0 0 26px;
  max-width: 30em;
}

.lede strong { color: var(--ink); font-weight: 600; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }

.chip {
  font-size: 13px;
  color: var(--ink-2);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}

.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  padding: 11px 20px;
  transition: transform 0.12s, box-shadow 0.15s, background 0.15s;
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 6px 16px rgba(29, 78, 216, 0.22);
}

.btn-primary:hover { background: #1a45c0; }

.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 演示区 ---------- */
.demo {
  display: grid;
  gap: 14px;
}

.demo-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.demo-card {
  position: relative;
  background: var(--paper);
  border-radius: 12px;
  padding: 14px;
  overflow: hidden;
  background-image: linear-gradient(160deg, #edf1fa 0%, #e4eaf6 100%);
}

.demo-card img {
  display: block;
  width: 100%;
  height: auto;
}

.demo-tag {
  position: absolute;
  left: 10px;
  bottom: 8px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: rgba(15, 23, 42, 0.62);
  border-radius: 6px;
  padding: 2px 8px;
  backdrop-filter: blur(4px);
}

.demo-tag.ok { background: rgba(22, 101, 52, 0.78); }

.demo-note {
  font-size: 12.5px;
  color: var(--ink-3);
  margin: 0;
  text-align: center;
}

/* ---------- 段落通用 ---------- */
section { padding: 60px 0; }

/* 痛点对比：同一块纸，左有白块、右没有 */
.pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 28px;
}

.pain-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
}

.pain-stage {
  background-image: linear-gradient(160deg, #edf1fa 0%, #e4eaf6 100%);
  padding: 22px;
  display: grid;
  place-items: center;
  min-height: 150px;
}

.pain-stage img { width: 100%; max-width: 300px; display: block; }

.pain-cap {
  padding: 14px 18px 16px;
  border-top: 1px solid var(--line);
}

.pain-cap b { display: block; font-size: 14.5px; margin-bottom: 2px; }

.pain-cap span { font-size: 13px; color: var(--ink-2); }

.bad b { color: #b91c1c; }
.good b { color: #15803d; }

/* ---------- 三档 ---------- */
.sec-head { max-width: 56ch; }

h2 {
  font-size: clamp(22px, 2.8vw, 28px);
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  font-weight: 700;
}

.sec-head p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.tier {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--bg);
}

.tier-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 4px; }

.tier-key {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border-radius: 6px;
  padding: 1px 7px;
}

.tier-name { font-size: 14.5px; font-weight: 600; }

.tier-when { font-size: 12.5px; color: var(--ink-3); margin: 0 0 12px; min-height: 2.6em; }

.tier-shot {
  background-image: linear-gradient(160deg, #edf1fa 0%, #e4eaf6 100%);
  border-radius: 10px;
  padding: 10px;
}

.tier-shot img { display: block; width: 100%; height: auto; }

/* ---------- 命令 ---------- */
.code {
  background: #0f172a;
  border-radius: 14px;
  padding: 20px 22px;
  overflow-x: auto;
  margin-top: 26px;
}

.code code {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 2;
  color: #e2e8f0;
  white-space: pre;
  display: block;
}

.code .c { color: #7c8ba1; }

/* ---------- 数据条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: var(--bg-soft);
}

.stat b {
  display: block;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.stat span { font-size: 13.5px; color: var(--ink-2); }

/* ---------- 页脚 ---------- */
footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 34px 0 40px;
  margin-top: 20px;
}

/* 页脚整体居中：链接 → 隐私说明 → 构建信息（最底部一行，视觉上最弱） */
.foot-wrap { text-align: center; }

.foot-links {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-3);
}

.foot-links a { color: var(--ink-2); text-decoration: none; border-bottom: 1px solid var(--line); }
.foot-links a:hover { color: var(--accent); border-color: var(--accent); }

.foot-note {
  margin: 14px auto 0;
  font-size: 12.5px;
  color: var(--ink-3);
  max-width: 62ch;
}

.foot-build {
  margin: 22px 0 0;
  font-size: 12px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 52px 0 44px; }
  .tiers { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  section { padding: 46px 0; }
}

@media (max-width: 520px) {
  .wrap { padding: 0 18px; }
  .demo-row { grid-template-columns: 1fr; }
  .top-inner { height: 58px; }
  .top-link { padding: 5px 11px; font-size: 13px; }
  /* 375px 下长命令必然放不下 ⇒ 降字号让它少滚一点（仍保留横向滚动，不换行） */
  .code { padding: 16px; }
  .code code { font-size: 12px; line-height: 1.9; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}