/* === 全局 === */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: #f6f8fb;
  color: #1f2937;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
code { font-family: "SFMono-Regular", Menlo, Consolas, monospace; background: #f1f3f7; padding: 1px 6px; border-radius: 4px; font-size: 0.9em; }
code.big { font-size: 1.05em; padding: 4px 8px; background: #effaf3; color: #3eaf7c; }
a { color: #3eaf7c; text-decoration: none; }
a:hover { text-decoration: underline; }
* { -webkit-tap-highlight-color: rgba(62,175,124,.18); }
.muted { color: #6b7280; }
.small { font-size: 12px; }
.err { color: #c0392b; }
.grad { background: linear-gradient(90deg,#3eaf7c,#0a5ec5); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* === 顶栏 === */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px 0 20px; height: 58px; background: #fff;
  border-bottom: 1px solid #eaeef2;
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: #111827; font-size: 16px; }
.brand em { font-style: normal; color: #3eaf7c; margin-left: 4px; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: #3eaf7c; box-shadow: 0 0 0 4px rgba(62,175,124,.18); flex-shrink: 0; }
.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.nav a { padding: 6px 12px; border-radius: 8px; color: #4b5563; font-size: 14px; }
.nav a:hover { background: #f1f3f7; text-decoration: none; }
.nav a.on { background: #effaf3; color: #3eaf7c; }

/* === 主体 === */
.page { flex: 1; max-width: 960px; width: 100%; margin: 0 auto; padding: 28px 20px 60px; }
.hero { text-align: center; padding: 36px 0 18px; }
.hero h1 { font-size: 38px; margin: 0 0 12px; color: #111827; }
.hero .lead { font-size: 16px; color: #4b5563; }
.cta { margin-top: 22px; display: flex; gap: 12px; justify-content: center; }

.card {
  background: #fff; border: 1px solid #eaeef2; border-radius: 12px;
  padding: 22px 24px; margin: 16px 0; box-shadow: 0 1px 2px rgba(15,23,42,.04);
}
.card h2 { margin-top: 0; font-size: 20px; }
.card h3 { font-size: 16px; margin-top: 22px; }
.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid.two { grid-template-columns: 1fr; } }

/* === 表单 === */
.form { display: grid; gap: 12px; }
.form label { display: grid; gap: 6px; font-size: 14px; color: #374151; }
.form input, input, select, textarea {
  font: inherit; padding: 10px 12px; border: 1px solid #d6dbe1; border-radius: 8px;
  background: #fff; color: #111827; outline: none; transition: border-color .15s, box-shadow .15s;
}
.form input:focus, input:focus, select:focus, textarea:focus {
  border-color: #3eaf7c; box-shadow: 0 0 0 3px rgba(62,175,124,.18);
}
.row > input { min-width: 220px; flex: 1 1 200px; }
@media (max-width: 600px) {
  .row > input { min-width: 0; flex: 1 1 100%; }
}
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.spread { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.actions { display: flex; gap: 8px; margin-top: 4px; }

/* === 按钮 === */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; border: 1px solid #d6dbe1;
  background: #fff; color: #111827; cursor: pointer; font-size: 14px;
  transition: all .15s; text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:focus { outline: none; box-shadow: 0 0 0 3px rgba(62,175,124,.25); }
.btn:focus:not(:focus-visible) { box-shadow: none; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(62,175,124,.35); }
.btn:hover { border-color: #b6bcc4; background: #fafbfc; }
.btn.primary { background: #3eaf7c; border-color: #3eaf7c; color: #fff; }
.btn.primary:hover { background: #34a06c; }
.btn.xs { padding: 4px 10px; font-size: 12px; }
.btn.danger { color: #c0392b; border-color: #f4c7c1; }
.btn.danger:hover { background: #fdf1ef; }

/* === 列表 === */
.list { display: grid; gap: 8px; }
.item {
  padding: 10px 12px; background: #fafbfc; border: 1px solid #eef0f3; border-radius: 8px;
}

/* === 输出 === */
.out { margin-top: 12px; }
.kv { display: flex; align-items: center; gap: 8px; padding: 6px 0; font-size: 14px; flex-wrap: wrap; }
.kv > span:first-child { color: #6b7280; min-width: 60px; }
.result { background: #f8fbf7; border: 1px dashed #b9e0c8; border-radius: 8px; padding: 12px 14px; }
.bar { width: 140px; height: 6px; background: #eef0f3; border-radius: 3px; overflow: hidden; }
.bar span { display: block; height: 100%; background: linear-gradient(90deg,#3eaf7c,#0a5ec5); }

/* === KPI - 简洁浅色卡片 === */
.kpi { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 8px; }
.kpi-cell {
  position: relative;
  background: #f8fafc;
  border: 1px solid #eaeef2;
  border-radius: 10px;
  padding: 16px 18px;
  text-align: left;
  overflow: hidden;
}
.kpi-cell:nth-child(1) { background: #f0fdf4; }
.kpi-cell:nth-child(2) { background: #fffbeb; }
.kpi-cell:nth-child(3) { background: #faf5ff; }
.kpi-cell:nth-child(4) { background: #fef2f2; }
.kpi-cell::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 4px;
}
.kpi-cell:nth-child(1)::before { background: #3eaf7c; }
.kpi-cell:nth-child(2)::before { background: #f59e0b; }
.kpi-cell:nth-child(3)::before { background: #8b5cf6; }
.kpi-cell:nth-child(4)::before { background: #ef4444; }
.kpi-cell .num {
  font-size: 28px;
  font-weight: 700;
  color: #111827;
  font-feature-settings: "tnum";
  letter-spacing: -.3px;
}
.kpi-cell > div:last-child {
  color: #6b7280;
  font-size: 13px;
  margin-top: 4px;
}
@media (max-width: 600px) { .kpi { grid-template-columns: repeat(2, 1fr); } .kpi-cell .num { font-size: 24px; } }

/* === 文档 === */
.code { background: #0f172a; color: #e2e8f0; padding: 14px 16px; border-radius: 8px; overflow-x: auto; font-size: 13px; line-height: 1.6; }

/* === Toast === */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #111827; color: #fff; padding: 10px 16px; border-radius: 8px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: all .25s; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: #c0392b; }

/* === Footer === */
.footer {
  text-align: center; padding: 16px; color: #6b7280; font-size: 13px;
  border-top: 1px solid #eaeef2; background: #fff; display: flex; gap: 16px;
  justify-content: center; align-items: center; flex-wrap: wrap;
}

/* ================================================
   移动端侧边栏
   ================================================ */

/* 遮罩层 */
.sidebar-mask {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background-color: rgba(0,0,0,.65);
  z-index: 9;
  display: none;
  cursor: pointer;
}
.sidebar-mask.open { display: block; }

/* 侧边栏 - 从顶部栏下方开始 */
.sidebar {
  font-size: 16px;
  background-color: #fff;
  position: fixed;
  z-index: 10;
  top: 58px;   /* 从顶部栏下方开始 */
  left: 0; bottom: 0;
  width: 18rem;
  box-sizing: border-box;
  border-right: 1px solid #eaeef2;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform .2s ease;
  display: flex;
  flex-direction: column;
}
.sidebar.open { transform: translateX(0); }

/* 侧边栏链接 */
.sidebar-links {
  display: flex;
  flex-direction: column;
  padding: 12px;
}
.sidebar-links a {
  padding: 13px 16px;
  border-radius: 8px;
  color: #4b5563;
  font-size: 15px;
  font-weight: 500;
  display: block;
  transition: background .15s, color .15s;
}
.sidebar-links a:hover { background: #f1f3f7; text-decoration: none; }
.sidebar-links a.on {
  background: #effaf3;
  color: #3eaf7c;
  font-weight: 600;
}

/* 汉堡按钮 - 纯 CSS 三横线，放右边 */
.sidebar-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  border-radius: 6px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}
.sidebar-toggle:hover { background: #f1f3f7; }
.sidebar-toggle::before,
.sidebar-toggle::after,
.sidebar-toggle > span {
  content: '';
  display: block;
  width: 18px;
  height: 3px;
  background: #374151;
  border-radius: 2px;
  transition: all .2s;
}

/* 移动端媒体查询 */
@media (max-width: 719px) {
  .nav { display: none; }
  .sidebar-toggle { display: flex; }
}