/* ============================================================
   蜜蜂吧 Mifengba — 全站样式
   深色科技风 · 蜜蜂琥珀金点缀 · 移动优先响应式
   ============================================================ */

:root {
  color-scheme: dark;
  --bg: #0b0e14;
  --bg-soft: #10141d;
  --card: #141824;
  --card-hover: #1a2030;
  --border: #232a3b;
  --text: #e8eaf0;
  --text-dim: #9aa3b5;
  --text-faint: #6b7385;
  --amber: #f5b52e;
  --amber-deep: #ff8a3c;
  --gradient: linear-gradient(135deg, #f5b52e 0%, #ff8a3c 100%);
  --radius: 14px;
  --radius-sm: 8px;
  --nav-h: 64px;
  --maxw: 1120px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: anywhere;
}

img, svg { max-width: 100%; height: auto; }

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

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

/* ---------- 可访问性 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 10px 18px;
  background: var(--amber);
  color: #14100a;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; text-decoration: none; }
:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 代码块复制按钮 ---------- */
pre, .cmd-box { position: relative; }
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 12px;
  font-size: 12px;
  background: rgba(245, 181, 46, 0.12);
  color: var(--amber);
  border: 1px solid rgba(245, 181, 46, 0.35);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s;
}
pre:hover .copy-btn, .cmd-box:hover .copy-btn,
.copy-btn:focus-visible, .copy-btn.copied { opacity: 1; }
.copy-btn:hover { background: rgba(245, 181, 46, 0.25); }
.copy-btn.copied { color: #6fdc8c; border-color: rgba(111, 220, 140, 0.4); background: rgba(111, 220, 140, 0.1); }
@media (hover: none) { .copy-btn { opacity: 1; } }

/* ---------- 蜂巢背景纹理 ---------- */
.hex-bg {
  position: relative;
  overflow: hidden;
}
.hex-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='56' height='100' viewBox='0 0 56 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M28 0L56 17v33L28 67 0 50V17z M28 66L56 83v17H0V83z' fill='none' stroke='%23f5b52e' stroke-opacity='0.06' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 56px 100px;
  pointer-events: none;
}

/* ---------- 导航栏 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(11, 14, 20, 0.8);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand .logo { width: 32px; height: 32px; flex-shrink: 0; }
.brand em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: none;
  list-style: none;
  gap: 6px;
  align-items: center;
}
.nav-links a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 15px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: var(--card); text-decoration: none; }
.nav-links a.active { color: var(--amber); }
.nav-links a.nav-cta {
  color: #14100a;
  background: var(--gradient);
  font-weight: 600;
  margin-left: 8px;
}
.nav-links a.nav-cta:hover { filter: brightness(1.08); color: #14100a; }

/* 汉堡按钮(移动端) */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端下拉菜单 */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  z-index: 99;
  background: #0d1018;
  border-bottom: 1px solid var(--border);
  padding: 10px 20px 20px;
  max-height: calc(100vh - var(--nav-h));
  overflow-y: auto;
}
.nav-mobile.open { display: block; }
.nav-mobile a {
  display: block;
  padding: 13px 10px;
  color: var(--text);
  font-size: 16px;
  border-bottom: 1px solid var(--border);
}
.nav-mobile a:hover { text-decoration: none; color: var(--amber); }
.nav-mobile a.active { color: var(--amber); }
.nav-mobile a:last-child { border-bottom: none; }

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--nav-h) + 72px) 0 88px;
  text-align: center;
  position: relative;
}
.hero::after {
  content: "";
  position: absolute;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  width: 720px; height: 480px;
  background: radial-gradient(ellipse at center, rgba(245, 181, 46, 0.16) 0%, transparent 65%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(245, 181, 46, 0.4);
  border-radius: 999px;
  color: var(--amber);
  font-size: 13px;
  margin-bottom: 24px;
  background: rgba(245, 181, 46, 0.08);
}
.hero h1 {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 0.5px;
}
.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.sub {
  margin: 20px auto 0;
  max-width: 620px;
  color: var(--text-dim);
  font-size: 17px;
}
.hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  transition: transform 0.15s, filter 0.2s, background 0.2s;
  cursor: pointer;
  border: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: var(--gradient);
  color: #14100a;
  box-shadow: 0 4px 20px rgba(245, 181, 46, 0.25);
}
.btn-primary:hover { filter: brightness(1.08); color: #14100a; }
.btn-ghost {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--card-hover); color: var(--text); }

/* ---------- 区块通用 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-soft); }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 { font-size: 30px; font-weight: 700; }
.section-head p { color: var(--text-dim); margin-top: 10px; max-width: 560px; margin-left: auto; margin-right: auto; }
.kicker {
  display: block;
  color: var(--amber);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  gap: 22px;
  grid-template-columns: 1fr;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 181, 46, 0.45);
  background: var(--card-hover);
}
.card .icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(245, 181, 46, 0.12);
  font-size: 24px;
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--text-dim); font-size: 15px; }
.card .tag {
  display: inline-block;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
  font-weight: 600;
}
.tag-hot { background: rgba(245, 181, 46, 0.15); color: var(--amber); }
.tag-soon { background: rgba(154, 163, 181, 0.15); color: var(--text-dim); }
.card-link { display: block; color: inherit; }
.card-link:hover { text-decoration: none; }
.card .more { margin-top: 16px; color: var(--amber); font-size: 14px; font-weight: 600; }

/* ---------- 特色横排(产品详情) ---------- */
.feature-row {
  display: grid;
  gap: 32px;
  align-items: center;
  grid-template-columns: 1fr;
  margin-bottom: 64px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row h3 { font-size: 24px; margin-bottom: 12px; }
.feature-row p { color: var(--text-dim); }
.feature-row ul { margin-top: 14px; padding-left: 22px; color: var(--text-dim); }
.feature-row ul li { margin-bottom: 6px; }
.shot {
  background: linear-gradient(160deg, var(--card) 0%, var(--bg-soft) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 14px;
  overflow: hidden;
}

/* ---------- 统计条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  text-align: center;
}
.stats .num {
  font-size: 34px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stats .label { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

/* ---------- CTA 区 ---------- */
.cta-box {
  background: linear-gradient(140deg, rgba(245, 181, 46, 0.12) 0%, rgba(255, 138, 60, 0.06) 100%);
  border: 1px solid rgba(245, 181, 46, 0.3);
  border-radius: var(--radius);
  padding: 48px 28px;
  text-align: center;
}
.cta-box h2 { font-size: 26px; }
.cta-box p { color: var(--text-dim); margin: 12px auto 28px; max-width: 520px; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  background: var(--bg-soft);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer h4 { font-size: 15px; margin-bottom: 14px; color: var(--text); }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: var(--text-dim); font-size: 14px; }
.footer ul a:hover { color: var(--amber); }
.footer .about { color: var(--text-dim); font-size: 14px; max-width: 320px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  color: var(--text-faint);
  font-size: 13px;
  text-align: center;
}

/* ---------- 文档页 ---------- */
.docs-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: calc(var(--nav-h) + 32px);
  padding-bottom: 72px;
}
.docs-sidebar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  align-self: start;
}
.docs-sidebar h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-faint);
  margin: 18px 0 8px;
}
.docs-sidebar h4:first-child { margin-top: 0; }
.docs-sidebar ul { list-style: none; }
.docs-sidebar a {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.docs-sidebar a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.docs-sidebar a.active { color: var(--amber); background: rgba(245, 181, 46, 0.08); }
.docs-toggle {
  width: 100%;
  padding: 12px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  margin-bottom: 12px;
}
.docs-toggle::after { content: " ▾"; color: var(--amber); }
.docs-sidebar.collapsed { display: none; }

.docs-content { min-width: 0; }
.docs-content h1 { font-size: 30px; margin-bottom: 16px; }
.docs-content h2 {
  font-size: 22px;
  margin: 40px 0 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.docs-content h2:first-of-type { border-top: none; padding-top: 0; margin-top: 28px; }
.docs-content p { color: var(--text-dim); margin-bottom: 14px; }
.docs-content ul, .docs-content ol { color: var(--text-dim); padding-left: 24px; margin-bottom: 14px; }
.docs-content li { margin-bottom: 6px; }
.docs-content code {
  background: rgba(245, 181, 46, 0.1);
  color: var(--amber);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}
.docs-content pre {
  background: #0d1017;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  overflow-x: auto;
  margin-bottom: 18px;
}
.docs-content pre code {
  background: none;
  color: #d5dae6;
  padding: 0;
  font-size: 13.5px;
  line-height: 1.7;
}
.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 18px;
  font-size: 14.5px;
  display: block;
  overflow-x: auto;
}
.docs-content th, .docs-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
  white-space: nowrap;
}
.docs-content th { background: var(--card); }
.docs-content td { color: var(--text-dim); }
.callout {
  border-left: 3px solid var(--amber);
  background: rgba(245, 181, 46, 0.07);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
  margin-bottom: 18px;
  font-size: 14.5px;
  color: var(--text-dim);
}

/* ---------- Demo 对话 ---------- */
.demo-wrap { max-width: 760px; margin: 0 auto; }
.chat-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.chat-head .dot { width: 10px; height: 10px; border-radius: 50%; background: #34c759; }
.chat-head .title { font-size: 14.5px; font-weight: 600; }
.chat-head .status { font-size: 12.5px; color: var(--text-faint); margin-left: auto; }
.chat-log {
  height: 420px;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.msg {
  max-width: 85%;
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 14.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}
.msg.user {
  align-self: flex-end;
  background: var(--gradient);
  color: #14100a;
  border-bottom-right-radius: 4px;
}
.msg.bot {
  align-self: flex-start;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.msg.bot .typing-cursor {
  display: inline-block;
  width: 8px; height: 15px;
  background: var(--amber);
  vertical-align: text-bottom;
  animation: blink 0.8s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.chat-input-row {
  display: flex;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}
.chat-input-row input {
  flex: 1;
  min-width: 0;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 15px;
  outline: none;
}
.chat-input-row input:focus { border-color: var(--amber); }
.chat-input-row button { padding: 12px 24px; }
.demo-suggest {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  justify-content: center;
}
.demo-suggest button {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.demo-suggest button:hover { border-color: var(--amber); color: var(--amber); }

/* ---------- 截图画廊 ---------- */
.gallery {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
.gallery .shot { aspect-ratio: 16 / 9; }
.gallery .shot.wide { grid-column: 1 / -1; aspect-ratio: 21 / 9; }

/* ---------- 下载区 ---------- */
.dl-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.dl-card .ver {
  display: inline-block;
  font-size: 13px;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(245, 181, 46, 0.15);
  color: var(--amber);
  font-weight: 600;
  margin-left: 10px;
  vertical-align: middle;
}
.dl-card .meta { color: var(--text-faint); font-size: 13.5px; margin-top: 6px; }
.platform-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}
.platform-btns .btn { font-size: 15px; padding: 11px 22px; }
.cmd-box {
  margin-top: 18px;
  background: #0d1017;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  overflow-x: auto;
}
.cmd-box code {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  color: #d5dae6;
  white-space: pre;
}
.cmd-box .cmt { color: var(--text-faint); }

/* ---------- 下载页:平台切换器 ---------- */
.os-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 14px;
}
.os-tabs button {
  padding: 10px 22px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-dim);
  font-size: 15px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.os-tabs button:hover { border-color: var(--amber); color: var(--amber); }
.os-tabs button.active {
  background: var(--gradient);
  border-color: transparent;
  color: #14100a;
  font-weight: 600;
}
.os-tabs.in-card {
  justify-content: flex-start;
  margin: 20px 0 4px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.os-tabs.in-card button { font-size: 14px; padding: 8px 18px; }

/* ---------- 下载页:系统分组与推荐高亮 ---------- */
.os-group { margin-top: 20px; }
.os-group h4 {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.os-group .btns { display: flex; flex-wrap: wrap; gap: 10px; }
.os-group .btn { font-size: 14px; padding: 9px 18px; }
[data-os].os-recommended {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
.dl-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 36px;
}
.dl-toc a {
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: 14px;
  background: var(--card);
}
.dl-toc a:hover { border-color: var(--amber); color: var(--amber); text-decoration: none; }
.dl-toc a.active {
  background: var(--gradient);
  border-color: transparent;
  color: #14100a;
  font-weight: 600;
}
.dl-card + .dl-card { margin-top: 24px; }
.dl-card .icon-lg { font-size: 30px; margin-right: 10px; vertical-align: middle; }
.req-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 18px;
  display: block;
  overflow-x: auto;
}
.req-table th, .req-table td {
  border: 1px solid var(--border);
  padding: 9px 14px;
  text-align: left;
  white-space: nowrap;
}
.req-table th { background: var(--bg-soft); color: var(--text); }
.req-table td { color: var(--text-dim); }

/* ---------- 面包屑 ---------- */
.crumbs {
  font-size: 13.5px;
  color: var(--text-faint);
  margin-bottom: 18px;
}
.crumbs a { color: var(--text-dim); }
.crumbs a:hover { color: var(--amber); }

/* ---------- 更新日志 ---------- */
.changelog { list-style: none; border-left: 2px solid var(--border); }
.changelog li { position: relative; padding: 0 0 26px 24px; }
.changelog li::before {
  content: "";
  position: absolute;
  left: -6px; top: 7px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--gradient);
}
.changelog .v { font-weight: 700; }
.changelog .date { color: var(--text-faint); font-size: 13px; margin-left: 10px; }
.changelog p { color: var(--text-dim); font-size: 14.5px; margin-top: 4px; }

/* ---------- 滚动淡入动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 内页头部 ---------- */
.page-head {
  padding: calc(var(--nav-h) + 56px) 0 40px;
  text-align: center;
}
.page-head h1 { font-size: 32px; }
.page-head p { color: var(--text-dim); margin-top: 12px; max-width: 560px; margin-left: auto; margin-right: auto; }

/* ============================================================
   响应式断点
   ============================================================ */
@media (min-width: 768px) {
  .hero h1 { font-size: 52px; }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .feature-row { grid-template-columns: 1fr 1fr; }
  .feature-row.reverse .feature-text { order: 2; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

@media (min-width: 1024px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .docs-layout { grid-template-columns: 250px 1fr; }
  .docs-toggle { display: none; }
  .docs-sidebar.collapsed { display: block; }
  .docs-sidebar { position: sticky; top: calc(var(--nav-h) + 24px); }
}