:root {
  --blue: #007aff;
  --blue-dark: #0062cc;
  --green: #34c759;
  --orange: #ff9f0a;
  --purple: #af52de;
  --ink: #1d1d1f;
  --secondary: #6e6e73;
  --tertiary: #8e8e93;
  --separator: rgba(60,60,67,.12);
  --bg: #f5f5f7;
  --surface: rgba(255,255,255,.86);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 6%, rgba(115,171,255,.14), transparent 26rem),
    radial-gradient(circle at 40% 108%, rgba(175,82,222,.06), transparent 30rem),
    var(--bg);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

/* —— 侧边目录 —— */
.g-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 40;
  width: 264px;
  padding: 26px 16px 20px;
  display: flex;
  flex-direction: column;
  background: rgba(248,248,250,.85);
  border-right: 1px solid rgba(255,255,255,.8);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  overflow-y: auto;
}
.g-brand { padding: 0 10px 22px; }
.g-brand strong { display: block; font-size: 18px; letter-spacing: -.02em; }
.g-brand span { display: block; margin-top: 4px; color: var(--tertiary); font-size: 11px; }
.g-nav { display: grid; gap: 3px; }
.g-nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 11px;
  color: var(--secondary);
  font-size: 13px;
  text-decoration: none;
  transition: .18s ease;
}
.g-nav a:hover { background: rgba(118,118,128,.08); color: var(--ink); }
.g-nav a.is-active { color: #fff; background: linear-gradient(135deg,#1687ff,#006bd6); box-shadow: 0 6px 16px rgba(0,122,255,.22); }
.g-side-foot { margin-top: auto; padding: 16px 10px 2px; border-top: 1px solid var(--separator); color: var(--secondary); font-size: 12px; line-height: 1.7; }

/* —— 主区域 —— */
.g-main { margin-left: 264px; min-height: 100vh; }
.g-top {
  position: sticky;
  top: 0;
  z-index: 30;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(245,245,247,.82);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid rgba(255,255,255,.8);
}
.g-crumbs { font-size: 13px; font-weight: 650; color: var(--secondary); }
.g-crumbs b { color: var(--ink); }
.g-pager { display: flex; gap: 8px; }
.g-pager button, .g-menu {
  min-height: 36px;
  padding: 0 15px;
  border: 0;
  border-radius: 11px;
  font: inherit;
  font-size: 13px;
  font-weight: 620;
  color: var(--ink);
  background: rgba(118,118,128,.1);
  cursor: pointer;
  transition: .18s ease;
}
.g-pager button:hover, .g-menu:hover { background: rgba(118,118,128,.18); }
.g-pager button:disabled { opacity: .4; cursor: default; }
.g-menu { display: none; }

/* —— 页面 —— */
.g-pages { padding: 34px clamp(24px, 5vw, 72px) 110px; }
.g-page { display: none; max-width: 880px; }
.g-page.is-active { display: block; animation: g-in .3s ease both; }
@keyframes g-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.g-page h1 { margin: 0 0 8px; font-size: clamp(28px, 3.4vw, 42px); letter-spacing: -.04em; line-height: 1.1; }
.g-page h2 { margin: 40px 0 14px; font-size: 22px; letter-spacing: -.025em; }
.g-page h3 { margin: 28px 0 10px; font-size: 17px; letter-spacing: -.015em; }
.g-lead { margin: 0 0 10px; color: var(--secondary); font-size: 15px; line-height: 1.75; }
.g-page p { color: var(--secondary); font-size: 14.5px; line-height: 1.85; }
.g-page p strong { color: var(--ink); }
.g-page ul, .g-page ol { color: var(--secondary); font-size: 14.5px; line-height: 1.9; padding-left: 22px; }
.g-page li + li { margin-top: 6px; }

/* —— 步骤卡 —— */
.g-step {
  display: flex;
  gap: 16px;
  margin: 14px 0;
  padding: 18px 20px;
  border-radius: 18px;
  background: var(--surface);
  border: 1px solid rgba(255,255,255,.92);
  box-shadow: 0 10px 30px rgba(35,43,57,.05);
}
.g-step-n {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--blue);
  font-size: 14px;
  font-weight: 700;
}
.g-step-body { flex: 1; min-width: 0; }
.g-step-body > strong { display: block; font-size: 15px; color: var(--ink); }
.g-step-body p strong, .g-step-body li strong { display: inline; font-size: inherit; }
.g-step-body p { margin: 6px 0 0; font-size: 13.5px; line-height: 1.8; }
.g-step-body p code, .g-page code { padding: 1px 7px; border-radius: 6px; background: rgba(0,122,255,.08); color: var(--blue-dark); font-size: .92em; font-family: ui-monospace, "SF Mono", Menlo, monospace; }

/* —— 提示与警告 —— */
.g-tip, .g-warn { margin: 18px 0; padding: 14px 18px; border-radius: 15px; font-size: 13.5px; line-height: 1.8; }
.g-tip { color: #0b5cad; background: rgba(0,122,255,.07); border: 1px solid rgba(0,122,255,.14); }
.g-warn { color: #8a5b00; background: rgba(255,159,10,.09); border: 1px solid rgba(255,159,10,.18); }
.g-tip strong, .g-warn strong { display: block; margin-bottom: 3px; font-size: 13px; }

/* —— 表格 —— */
.g-table { width: 100%; margin: 16px 0; border-collapse: collapse; background: var(--surface); border-radius: 16px; overflow: hidden; border: 1px solid rgba(255,255,255,.92); box-shadow: 0 8px 26px rgba(35,43,57,.05); font-size: 13.5px; }
.g-table th, .g-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--separator); vertical-align: top; }
.g-table th { color: var(--ink); background: rgba(118,118,128,.06); font-weight: 650; font-size: 12.5px; }
.g-table td { color: var(--secondary); line-height: 1.7; }
.g-table tr:last-child td { border-bottom: 0; }

/* —— 键盘键 —— */
kbd { padding: 2px 8px; border-radius: 7px; background: #fff; border: 1px solid var(--separator); box-shadow: 0 2px 0 rgba(60,60,67,.12); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .9em; color: var(--ink); }

/* —— 响应式 —— */
@media (max-width: 900px) {
  .g-sidebar { transform: translateX(-100%); transition: transform .25s ease; box-shadow: 0 20px 60px rgba(34,42,56,.15); }
  .g-sidebar.is-open { transform: none; }
  .g-main { margin-left: 0; }
  .g-menu { display: block; }
  .g-top { padding: 12px 16px; }
  .g-pages { padding: 24px 18px 90px; }
}