/* ============================================================
   xs 官网 DEMO — 设计系统
   深色开发工具风格 · 无外部依赖 · 离线可用
   ============================================================ */

:root {
  --bg:        #060a13;
  --bg-2:      #090e1a;
  --bg-3:      #0d1424;
  --surface:   rgba(148, 163, 184, 0.055);
  --surface-2: rgba(148, 163, 184, 0.09);
  --border:    rgba(148, 163, 184, 0.14);
  --border-hi: rgba(103, 232, 249, 0.35);
  --text:      #e8eef7;
  --muted:     #94a3b8;
  --dim:       #64748b;
  --cyan:      #22d3ee;
  --cyan-soft: #67e8f9;
  --violet:    #8b5cf6;
  --amber:     #fbbf24;
  --green:     #34d399;
  --red:       #f87171;

  --font-ui:   "Inter", "Segoe UI", "PingFang SC", "HarmonyOS Sans SC",
               "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "SF Mono", "Fira Code",
               Consolas, "Courier New", monospace;

  --radius:    16px;
  --nav-h:     68px;
  --ease:      cubic-bezier(.22, .7, .25, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(34, 211, 238, .28); color: #fff; }

code {
  font-family: var(--font-mono);
  font-size: .86em;
  color: var(--cyan-soft);
  background: rgba(34, 211, 238, .08);
  border: 1px solid rgba(34, 211, 238, .14);
  border-radius: 6px;
  padding: .08em .42em;
  white-space: normal;   /* 允许长内联代码折行；代码块内由块级规则覆盖 */
  word-break: break-all;
}

.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: .95rem; font-weight: 600;
  padding: 12px 26px; border-radius: 12px;
  text-decoration: none; cursor: pointer;
  border: 1px solid transparent;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background .25s var(--ease), border-color .25s var(--ease);
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn-sm { padding: 8px 18px; font-size: .88rem; border-radius: 10px; }

.btn-primary {
  color: #04121a;
  background: linear-gradient(135deg, #67e8f9 0%, #22d3ee 45%, #7dd3fc 100%);
  box-shadow: 0 4px 24px -6px rgba(34, 211, 238, .55),
              inset 0 1px 0 rgba(255, 255, 255, .45);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 34px -6px rgba(34, 211, 238, .75),
              inset 0 1px 0 rgba(255, 255, 255, .45);
}
.btn-ghost {
  color: var(--text);
  border-color: var(--border);
  background: var(--surface);
}
.btn-ghost:hover {
  border-color: var(--border-hi);
  background: var(--surface-2);
  transform: translateY(-2px);
}

/* ---------------- 导航 ---------------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: background .3s var(--ease), border-color .3s var(--ease),
              backdrop-filter .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6, 10, 19, .78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 28px;
  height: 100%;
  display: flex; align-items: center; gap: 32px;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand-mark { border-radius: 9px; filter: drop-shadow(0 2px 10px rgba(34,211,238,.35)); }
.brand-name {
  font-family: var(--font-mono);
  font-size: 1.3rem; font-weight: 800; letter-spacing: -.02em;
  color: var(--text);
}
.brand-logo {
  display: block; height: 30px; width: auto;
  filter: drop-shadow(0 2px 10px rgba(34, 211, 238, .22));
}
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  color: var(--muted); text-decoration: none;
  font-size: .92rem; font-weight: 500;
  padding: 8px 14px; border-radius: 9px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-sep {
  width: 1px; height: 16px; align-self: center;
  background: var(--border); margin: 0 6px;
}
.nav-links a.nav-doc { color: var(--cyan-soft); }
/* 语言切换器（中 / EN / RU） */
.nav-langsel { display: flex; align-items: center; gap: 7px; font-size: .78rem; font-weight: 600; }
.nav-langsel a { color: var(--dim); text-decoration: none; padding: 4px 2px; letter-spacing: .02em; }
.nav-langsel a:hover { color: var(--text); }
.nav-langsel a.on { color: var(--cyan); }
.nav-drawer .drawer-lang { display: flex; gap: 18px; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.nav-drawer .drawer-lang a { color: var(--cyan-soft); }
.nav-links a.nav-repo { color: var(--dim); padding: 8px 10px; }
.nav-links a.nav-repo:hover { color: var(--text); background: var(--surface-2); }
.nav .btn { margin-left: 8px; }

/* ---------------- 折叠菜单（源码 / 语言） ---------------- */
.nav-menu { position: relative; display: inline-flex; }
.nav-menu-btn { background: none; border: none; cursor: pointer; font: inherit; font-size: .82rem; font-weight: 600; letter-spacing: .02em; color: var(--dim); padding: 8px 10px; border-radius: 8px; }
.nav-menu-btn::after { content: "▾"; font-size: .6rem; margin-left: 5px; opacity: .75; }
.nav-menu:hover .nav-menu-btn, .nav-menu:focus-within .nav-menu-btn { color: var(--text); background: var(--surface-2); }
.nav-menu-list { position: absolute; right: 0; top: calc(100% + 4px); min-width: 132px; display: flex; flex-direction: column; gap: 2px; padding: 6px; background: var(--bg-2); border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 14px 34px rgba(0, 0, 0, .4); opacity: 0; visibility: hidden; transform: translateY(-5px); transition: opacity .15s ease, transform .15s ease, visibility .15s; z-index: 80; }
.nav-menu:hover .nav-menu-list, .nav-menu:focus-within .nav-menu-list { opacity: 1; visibility: visible; transform: none; }
.nav-menu-list a { color: var(--muted); text-decoration: none; font-size: .8rem; font-weight: 500; padding: 7px 10px; border-radius: 7px; white-space: nowrap; }
.nav-menu-list a:hover { color: var(--text); background: var(--surface-2); }
.nav-menu-list a.on { color: var(--cyan); }
.nav-langsel.nav-menu .nav-menu-btn { font-size: .78rem; }
.nav-drawer details.drawer-menu { margin: 0 8px; }
.nav-drawer details.drawer-menu summary { cursor: pointer; list-style: none; color: var(--cyan-soft); font-weight: 600; font-size: .92rem; }
.nav-drawer details.drawer-menu summary::-webkit-details-marker { display: none; }
.nav-drawer details.drawer-menu summary::after { content: "▾"; float: right; font-size: .7rem; opacity: .7; }
.nav-drawer details.drawer-menu[open] summary::after { content: "▴"; }
.nav-drawer details.drawer-menu > a { padding-left: 32px; }
.nav-drawer details.drawer-lang { display: block; margin-top: 10px; padding-top: 6px; border-top: 1px solid var(--border); }
.code-more {
  font-family: var(--font-mono);
  font-size: .78rem; font-weight: 600;
  color: var(--green); text-decoration: none;
  white-space: nowrap;
}
.code-more:hover { color: #6ee7b7; }
/* 正文内联参考链接（表格单元格 / 卡片标题） */
a.lnk {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px dashed rgba(103, 232, 249, .35);
}
a.lnk:hover { border-bottom-style: solid; border-bottom-color: var(--cyan); }
a.lnk code { color: inherit; background: none; border: none; padding: 0; white-space: inherit; }

/* 正文裸链接兜底（无 class 的内容链接统一浅青，杜绝浏览器默认蓝） */
.doc-section p a:not([class]), .book-sec p a:not([class]),
.doc-section li a:not([class]), .book-sec li a:not([class]),
.doc-section dd a:not([class]), .book-sec dd a:not([class]),
.doc-section td a:not([class]), .book-sec td a:not([class]),
.page-hero p a:not([class]), .callout a:not([class]),
.intro-note a:not([class]) {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px dashed rgba(103, 232, 249, .35);
}
.doc-section p a:not([class]):hover, .book-sec p a:not([class]):hover,
.doc-section li a:not([class]):hover, .book-sec li a:not([class]):hover,
.doc-section dd a:not([class]):hover, .book-sec dd a:not([class]):hover,
.doc-section td a:not([class]):hover, .book-sec td a:not([class]):hover,
.page-hero p a:not([class]):hover, .callout a:not([class]):hover,
.intro-note a:not([class]):hover {
  border-bottom-style: solid;
  border-bottom-color: var(--cyan);
}

/* 整卡可点击（api-card / domain-card 作为 <a> 时） */
a.api-card, a.domain-card {
  text-decoration: none;
  color: inherit;
  display: block;
}
a.api-card:hover h4 { color: var(--cyan-soft); }
.footer-links { display: inline-flex; gap: 18px; margin-left: 22px; }
.footer-links a { color: var(--muted); font-size: .82rem; text-decoration: none; }
.footer-links a:hover { color: var(--cyan-soft); }

/* 汉堡按钮（仅移动端显示） */
.nav-burger {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 42px; height: 42px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 10px; cursor: pointer;
  margin-left: 10px; padding: 0;
}
.nav-burger span {
  display: block; width: 18px; height: 2px;
  margin: 0 auto; border-radius: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉菜单 */
.nav-drawer {
  position: fixed; top: var(--nav-h); left: 0; right: 0;
  z-index: 99;
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 20px 18px;
  background: rgba(6, 10, 19, .96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  opacity: 0; visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
}
.nav-drawer.open { opacity: 1; visibility: visible; transform: none; }
.nav-drawer a {
  color: var(--text); text-decoration: none;
  font-size: 1rem; font-weight: 500;
  padding: 12px 14px; border-radius: 10px;
}
.nav-drawer a:hover { background: var(--surface-2); }

/* ---------------- HERO ---------------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 76px) 0 96px;
  overflow: clip;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.glow-cyan {
  width: 620px; height: 620px; left: -160px; top: -200px;
  background: radial-gradient(circle, rgba(34,211,238,.32), transparent 65%);
  animation: drift 16s ease-in-out infinite alternate;
}
.glow-violet {
  width: 560px; height: 560px; right: -140px; top: 40px;
  background: radial-gradient(circle, rgba(139,92,246,.26), transparent 65%);
  animation: drift 20s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(50px, 36px) scale(1.12); }
}
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148,163,184,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,.05) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
}

.hero-grid {
  position: relative;
  display: grid; grid-template-columns: 1.08fr .92fr;
  gap: 56px; align-items: center;
}

.badge {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: .8rem;
  color: var(--cyan-soft);
  background: rgba(34, 211, 238, .07);
  border: 1px solid rgba(34, 211, 238, .22);
  border-radius: 999px; padding: 6px 16px;
  margin-bottom: 26px;
}
.badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, .6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(52, 211, 153, .55); }
  70%  { box-shadow: 0 0 0 9px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero h1 {
  font-size: clamp(2.5rem, 5.2vw, 4.1rem);
  font-weight: 800; line-height: 1.16; letter-spacing: -.02em;
  margin-bottom: 24px;
}
.hero h1 em, .grad {
  font-style: normal;
  background: linear-gradient(100deg, #67e8f9 5%, #22d3ee 40%, #a78bfa 85%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub {
  color: var(--muted); font-size: 1.08rem;
  max-width: 34em; margin-bottom: 34px;
}
.hero-sub strong { color: var(--cyan-soft); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 46px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, auto);
  gap: 8px 38px; justify-content: start;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.9rem; font-weight: 700; letter-spacing: -.02em;
  color: var(--text); line-height: 1.2;
  display: flex; align-items: baseline; gap: 3px;
}
.stat-num i {
  font-style: normal; font-size: .95rem; font-weight: 600;
  color: var(--cyan); margin-left: 2px;
}
.stat-label { font-size: .82rem; color: var(--dim); line-height: 1.45; }
.stat-label small { display: block; opacity: .75; }

/* ---------------- 终端 ---------------- */
.term {
  background: linear-gradient(180deg, #0c1322 0%, #0a101c 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 24px 70px -20px rgba(2, 6, 17, .9),
              0 0 0 1px rgba(34, 211, 238, .04),
              0 0 46px -18px rgba(34, 211, 238, .22);
  overflow: hidden;
}
.term-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 16px;
  background: rgba(148, 163, 184, .05);
  border-bottom: 1px solid var(--border);
}
.term-dot { width: 11px; height: 11px; border-radius: 50%; }
.term-dot.r { background: #ff5f57; } .term-dot.y { background: #febc2e; }
.term-dot.g { background: #28c840; }
.term-title {
  margin-left: 8px;
  font-family: var(--font-mono); font-size: .74rem;
  color: var(--dim); letter-spacing: .04em;
}
.term-body {
  font-family: var(--font-mono);
  font-size: .82rem; line-height: 1.85;
  padding: 18px 20px;
  min-height: 332px;
  color: #b7c3d4;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-y: auto;
  scrollbar-width: none;
}
.term-body::-webkit-scrollbar { display: none; }
.term-body .tl { min-height: 1.85em; }
.term[data-term="hero"]   .term-body { height: 348px; }
.term[data-term="reload"] .term-body { height: 500px; }
.term-body .l-cmd    { color: #e8eef7; }
.term-body .l-prompt { color: var(--cyan); user-select: none; }
.term-body .l-dim    { color: #64748b; }
.term-body .l-ok     { color: var(--green); }
.term-body .l-warn   { color: var(--amber); }
.term-body .l-cyan   { color: var(--cyan-soft); }
.term-body .l-violet { color: #c4b5fd; }
.caret {
  display: inline-block; width: 8px; height: 1.05em;
  background: var(--cyan); vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.term-note {
  margin-top: 14px; text-align: center;
  font-size: .8rem; color: var(--dim);
}

/* ---------------- 能力滚动条 ---------------- */
.ticker {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(148, 163, 184, .025);
  overflow: hidden; padding: 15px 0;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track {
  display: inline-flex; align-items: center; gap: 26px;
  white-space: nowrap;
  animation: scroll 46s linear infinite;
  font-family: var(--font-mono);
  font-size: .84rem; color: var(--muted);
}
.ticker-track b { color: var(--cyan); opacity: .55; font-weight: 400; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------------- 通用 section ---------------- */
.section { padding: 104px 0; }
.section-alt {
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(34, 211, 238, .045), transparent),
    var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head { max-width: 720px; margin-bottom: 56px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 800; letter-spacing: -.015em; line-height: 1.28;
}
.section-sub { color: var(--muted); margin-top: 18px; font-size: 1.02rem; }
.section-sub strong { color: var(--cyan-soft); font-weight: 600; }
.fineprint {
  margin-top: 34px; font-size: .82rem; color: var(--dim);
  padding-left: 14px; border-left: 2px solid var(--border);
}

/* ---------------- 卡片 ---------------- */
.card {
  background: linear-gradient(180deg, rgba(148,163,184,.06), rgba(148,163,184,.028));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 0;   /* grid/flex 子项允许收缩，防内容撑破视口 */
  transition: transform .3s var(--ease), border-color .3s var(--ease),
              box-shadow .3s var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(103, 232, 249, .28);
  box-shadow: 0 18px 46px -18px rgba(2, 6, 17, .85),
              0 0 40px -22px rgba(34, 211, 238, .4);
}

/* ---------------- 特性 ---------------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.feature { padding: 26px 24px 24px; }
.feature-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  color: var(--cyan);
  background: rgba(34, 211, 238, .09);
  border: 1px solid rgba(34, 211, 238, .18);
  margin-bottom: 18px;
}
.feature-icon svg { width: 23px; height: 23px; }
.feature h3 { font-size: 1.04rem; font-weight: 700; margin-bottom: 10px; letter-spacing: -.01em; }
.feature p { font-size: .88rem; color: var(--muted); line-height: 1.72; }
.feature p strong { color: var(--cyan-soft); font-weight: 600; }
.feature-hot {
  background:
    linear-gradient(180deg, rgba(34,211,238,.09), rgba(139,92,246,.05)),
    linear-gradient(180deg, rgba(148,163,184,.05), rgba(148,163,184,.02));
  border-color: rgba(34, 211, 238, .3);
}

/* ---------------- 热重载 ---------------- */
.reload-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 44px; align-items: start;
}
.reload-grid .term-body { min-height: 480px; }
.steps { list-style: none; counter-reset: step; }
.steps li {
  position: relative;
  padding: 0 0 26px 58px;
  counter-increment: step;
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 1px;
  font-family: var(--font-mono);
  font-size: .78rem; font-weight: 700;
  color: var(--cyan);
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: rgba(34, 211, 238, .08);
  border: 1px solid rgba(34, 211, 238, .22);
}
.steps li::after {
  content: "";
  position: absolute; left: 19px; top: 44px; bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(34,211,238,.3), rgba(148,163,184,.08));
}
.steps li:last-child::after { display: none; }
.steps b { display: block; font-size: 1rem; margin-bottom: 3px; letter-spacing: -.01em; }
.steps span { font-size: .87rem; color: var(--muted); }
.chip-row { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 6px; }
.chip {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 5px 13px; border-radius: 999px;
}

/* ---------------- 代码区 ---------------- */
.code-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #0a101c;
  overflow: hidden;
  box-shadow: 0 24px 70px -24px rgba(2, 6, 17, .9);
}
.tabs {
  display: flex; gap: 2px;
  padding: 10px 12px 0;
  background: rgba(148, 163, 184, .04);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab {
  appearance: none; border: none; cursor: pointer;
  font-family: var(--font-mono);
  font-size: .84rem; font-weight: 500;
  color: var(--dim);
  background: transparent;
  padding: 10px 20px 12px;
  border-radius: 10px 10px 0 0;
  border-bottom: 2px solid transparent;
  transition: color .2s, background .2s, border-color .2s;
  white-space: nowrap;
}
.tab:hover { color: var(--text); background: rgba(148,163,184,.06); }
.tab.active {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan);
  background: rgba(34, 211, 238, .07);
}
.code-panels { position: relative; }
.code-panel {
  display: none;
  padding: 26px 30px;
  font-family: var(--font-mono);
  font-size: .845rem; line-height: 1.78;
  color: #c3cdda;
  overflow-x: auto;
  tab-size: 4;
}
.code-panel.active { display: block; animation: fadein .35s var(--ease); }
/* 恢复代码块内 <code> 的 pre 换行（全局内联 code 的 white-space:normal 不适用于代码块） */
.code-panel code {
  background: none; border: none; padding: 0; color: inherit;
  white-space: pre; word-break: normal;
}
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } }

/* C 语法高亮（JS 注入的 span） */
.tok-cmt  { color: #5b6b7f; font-style: italic; }
.tok-str  { color: #a5d6a7; }
.tok-kw   { color: #c792ea; }
.tok-type { color: #7dd3fc; }
.tok-num  { color: #fdba74; }
.tok-fn   { color: #ffe6a7; }
.tok-pp   { color: #f0abfc; }

.code-foot {
  display: flex; justify-content: space-between; align-items: center;
  gap: 18px; flex-wrap: wrap;
  padding: 14px 26px;
  border-top: 1px solid var(--border);
  font-size: .8rem; color: var(--dim);
}
.code-foot .mono { font-family: var(--font-mono); color: var(--green); }

/* ---------------- 基准 ---------------- */
.kpi-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-bottom: 22px;
}
.kpi { padding: 22px 24px 20px; }
.kpi-num {
  font-family: var(--font-mono);
  font-size: 2rem; font-weight: 700; letter-spacing: -.02em;
  display: flex; align-items: baseline; gap: 2px;
  margin-bottom: 4px;
}
.kpi-num i {
  font-style: normal; font-size: .95rem; color: var(--cyan);
  margin-left: 3px; font-weight: 600;
}
.kpi-label { font-size: .85rem; color: var(--muted); }
.kpi-label small { display: block; color: var(--dim); font-size: .76rem; margin-top: 2px; }

.bench-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.bench-panel { padding: 26px 28px 24px; }
.bench-panel h3 {
  font-size: 1rem; font-weight: 700;
  margin-bottom: 22px; letter-spacing: -.01em;
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
}
.bench-unit { font-family: var(--font-mono); font-size: .72rem; font-weight: 400; color: var(--dim); }

.bars { display: flex; flex-direction: column; gap: 15px; }
.bar-row {
  display: grid;
  grid-template-columns: 96px 1fr 64px;
  align-items: center; gap: 14px;
}
.bar-name {
  font-size: .82rem; color: var(--muted);
  text-align: right; line-height: 1.3;
}
.bar-name small { display: block; font-size: .68rem; color: var(--dim); }
.bar-track {
  height: 13px; border-radius: 99px;
  background: rgba(148, 163, 184, .07);
  overflow: hidden;
}
.bar-fill {
  height: 100%; width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, #3f5570, #64748b);
  transition: width 1.15s var(--ease) .12s;
}
.bar-fill.is-xs {
  background: linear-gradient(90deg, #22d3ee, #818cf8);
  box-shadow: 0 0 16px -2px rgba(34, 211, 238, .55);
}
.in-view .bar-fill { width: var(--w); }
.bar-val {
  font-family: var(--font-mono);
  font-size: .8rem; color: var(--muted);
}
.bar-row:nth-child(-n+3) .bar-val { color: var(--text); }
.bench-note {
  margin-top: 26px; font-size: .88rem; color: var(--muted);
  max-width: 60em;
  padding-left: 14px; border-left: 2px solid rgba(34, 211, 238, .35);
}

/* ---------------- 架构 ---------------- */
.arch-stack { display: flex; flex-direction: column; gap: 0; }
.arch-layer {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  background: linear-gradient(180deg, rgba(148,163,184,.055), rgba(148,163,184,.025));
  position: relative;
}
.arch-app    { border-left: 3px solid var(--cyan); }
.arch-host   { border-left: 3px solid var(--violet); }
.arch-runtime{ border-left: 3px solid var(--green); }
.arch-tag {
  font-family: var(--font-mono);
  font-size: .74rem; letter-spacing: .06em;
  color: var(--dim); margin-bottom: 14px;
}
.arch-app .arch-tag     { color: var(--cyan-soft); }
.arch-host .arch-tag    { color: #c4b5fd; }
.arch-runtime .arch-tag { color: var(--green); }
.arch-body { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.pill {
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 4px 12px; border-radius: 8px;
}
.arch-app .pill     { border-color: rgba(34, 211, 238, .28);  background: rgba(34,211,238,.07); }
.arch-host .pill    { border-color: rgba(139, 92, 246, .3);   background: rgba(139,92,246,.08); }
.arch-runtime .pill { border-color: rgba(52, 211, 153, .26);  background: rgba(52,211,153,.06); }
.pill-dim { color: var(--muted); }
.arch-note { font-size: .8rem; color: var(--dim); }
.arch-link {
  display: flex; justify-content: center;
  padding: 4px 0;
}
.arch-link span {
  font-family: var(--font-mono);
  font-size: .72rem; color: var(--dim);
  padding: 3px 14px;
  border-radius: 99px;
  border: 1px dashed var(--border);
  background: var(--bg-2);
}
.arch-base {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 14px; justify-content: center;
}

/* ---------------- 部署 ---------------- */
.deploy-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 28px; align-items: stretch;
}

/* 单文件发布节（#pack）与桌面应用节（#app）：代码卡与要点列表，首页作用域样式
   （code-block/code-head 等同名类在 doc 页另有 .doc-section 规则，互不影响） */
#pack .card, #app .card { display: flex; flex-direction: column; }
#pack .card .code-block { flex: 1; display: flex; flex-direction: column; }
#pack .code-block pre.code-code { flex: 1; }
#pack .code-block {
  background: #0a101c;
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
}
#pack .code-head, #app .code-head {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono); font-size: .72rem; color: var(--dim);
  background: rgba(6, 10, 19, .65);
  border-radius: 9px 9px 0 0;
}
#pack .code-head .spacer, #app .code-head .spacer { flex: 1; }
#pack pre.code-code {
  margin: 0; padding: 16px 18px;
  font-family: var(--font-mono); font-size: .8rem; line-height: 1.8;
  color: #c3cdda; overflow-x: auto; white-space: pre;
}
/* 恢复规则：全局内联 code 的折行/胶囊样式不得进代码块 */
#pack .code-code code {
  background: none; border: none; padding: 0; color: inherit;
  font-size: inherit; white-space: pre; word-break: normal;
}
#pack .feature-list, #app .feature-list {
  list-style: none; margin: 4px 0 0; padding: 0;
  display: grid; gap: 11px;
}
#pack .feature-list li, #app .feature-list li {
  position: relative; padding-left: 20px;
  font-size: .88rem; line-height: 1.72; color: var(--muted);
}
#pack .feature-list li::before, #app .feature-list li::before {
  content: "▸"; position: absolute; left: 2px; top: 0;
  color: var(--cyan); font-size: .8rem;
}
#pack .feature-list strong, #app .feature-list strong { color: var(--cyan-soft); font-weight: 600; }

/* 桌面应用节：截图卡 + 要点卡 */
.app-grid {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 28px; align-items: stretch;
}
.app-shot { padding: 0; overflow: hidden; }
.app-shot img {
  width: 100%; flex: 1; min-height: 0;
  object-fit: cover; display: block;
}

.deploy-tree { padding: 24px 26px; }
.deploy-tree:hover { transform: none; }
.tree-head {
  font-family: var(--font-mono); font-weight: 700;
  font-size: .95rem; margin-bottom: 16px;
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
}
.tree-size { font-size: .72rem; font-weight: 400; color: var(--dim); }
.tree-body {
  font-family: var(--font-mono);
  font-size: .82rem; line-height: 2.0;
  color: #9fb0c3;
  overflow-x: auto;
}
.t-hl {
  color: var(--cyan-soft); font-weight: 700;
  background: rgba(34, 211, 238, .08);
  border-radius: 5px; padding: 1px 7px;
}
.t-ok { color: var(--green); }
.t-dim { color: var(--dim); }

.deploy-steps { display: flex; flex-direction: column; gap: 16px; }
.step-card {
  display: flex; gap: 20px; padding: 22px 24px;
  align-items: flex-start;
}
.step-no {
  font-family: var(--font-mono);
  font-size: 1.05rem; font-weight: 700;
  color: var(--cyan);
  padding-top: 1px;
}
.step-card h3 { font-size: 1rem; margin-bottom: 6px; letter-spacing: -.01em; }
.step-card p { font-size: .88rem; color: var(--muted); }
.cmd-chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 12px; }
.cmd-chips code {
  font-size: .78rem;
  padding: 5px 13px;
  background: rgba(6, 10, 19, .8);
  border-color: rgba(34, 211, 238, .22);
}

/* ---------------- 扩展 ---------------- */
/* 竖排展示：代码区获得足够横向空间，不出现横向滚动条 */
.ext-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.ext-card { padding: 22px 26px; display: flex; flex-direction: column; }
.ext-head { display: flex; align-items: center; gap: 15px; margin-bottom: 16px; }
.ext-logo {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: .8rem; font-weight: 800;
  flex-shrink: 0;
}
.ext-sqlite { color: #7dd3fc; background: rgba(56, 189, 248, .1); border: 1px solid rgba(56, 189, 248, .3); }
.ext-xtp    { color: #c4b5fd; background: rgba(139, 92, 246, .1); border: 1px solid rgba(139, 92, 246, .32); }
.ext-xllm   { color: #fcd34d; background: rgba(251, 191, 36, .1); border: 1px solid rgba(251, 191, 36, .3); }
.ext-mail   { color: #f9a8d4; background: rgba(244, 114, 182, .1); border: 1px solid rgba(244, 114, 182, .3); }
.ext-md4c   { color: #6ee7b7; background: rgba(52, 211, 153, .1); border: 1px solid rgba(52, 211, 153, .3); }
.ext-acme   { color: #a5b4fc; background: rgba(129, 140, 248, .1); border: 1px solid rgba(129, 140, 248, .3); }
.ext-qr     { color: #93c5fd; background: rgba(96, 165, 250, .1); border: 1px solid rgba(96, 165, 250, .3); }
.ext-jwt    { color: #fda4af; background: rgba(251, 113, 133, .1); border: 1px solid rgba(251, 113, 133, .3); }
.ext-oauth  { color: #fdba74; background: rgba(251, 146, 60, .1); border: 1px solid rgba(251, 146, 60, .3); }
.ext-work   { color: #d8b4fe; background: rgba(192, 132, 252, .1); border: 1px solid rgba(192, 132, 252, .3); }
.ext-wv     { color: #93e4c7; background: rgba(110, 231, 183, .1); border: 1px solid rgba(110, 231, 183, .3); }
.ext-plus   { color: var(--green); background: rgba(52, 211, 153, .09); border: 1px solid rgba(52, 211, 153, .3); font-size: 1.3rem; }
.ext-meta { font-family: var(--font-mono); font-size: .72rem; color: var(--dim); }
.ext-card p { font-size: .87rem; color: var(--muted); margin-bottom: 16px; flex: 1; }
.ext-code {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--cyan-soft);
  background: rgba(6, 10, 19, .65);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 12px 16px;
  white-space: pre-wrap;
  word-break: break-all;
}
.ext-add { border-style: dashed; }

/* ---------------- CTA / FOOTER ---------------- */
.cta-section { padding-bottom: 40px; }
.cta {
  position: relative; overflow: hidden;
  text-align: center;
  padding: 74px 40px;
}
.cta-glow {
  position: absolute; inset: -40%;
  background: radial-gradient(ellipse 42% 55% at 50% 55%,
              rgba(34, 211, 238, .14), rgba(139, 92, 246, .09), transparent 70%);
  pointer-events: none;
}
.cta h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 800; letter-spacing: -.015em;
  margin-bottom: 14px;
}
.cta p { color: var(--muted); margin-bottom: 32px; }
.cta .hero-actions { justify-content: center; margin-bottom: 0; }

.footer {
  border-top: 1px solid var(--border);
  padding: 34px 0;
  background: var(--bg-2);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand .brand-name { font-size: 1.05rem; }
.footer-brand .brand-logo { height: 21px; filter: none; }
.footer-tag { font-size: .82rem; color: var(--dim); }
.footer-note { font-size: .78rem; color: var(--dim); text-align: right; }

/* ---------------- 友情链接（范本：xrt 官网） ---------------- */
.friends {
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  padding: 46px 0 54px;
}
.friends-title {
  font-size: 1.35rem; font-weight: 750; letter-spacing: .01em;
  color: var(--text); margin: 0 0 20px;
}
.friends-main { display: grid; grid-template-columns: 1fr; gap: 10px; }
.friend-card {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 18px;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface);
  text-decoration: none;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.friend-card:hover {
  border-color: var(--border-hi);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(34, 211, 238, .10);
}
.friend-logo {
  width: 176px; height: 54px; flex: none;
  display: flex; align-items: center; justify-content: center;
  background: #ffffff; border-radius: 10px; padding: 5px;
}
.friend-logo img { display: block; max-width: 100%; max-height: 100%; }
.friend-text { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.friend-name { font-size: .95rem; font-weight: 650; color: var(--text); }
.friend-desc {
  font-size: .82rem; color: var(--dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
@media (max-width: 640px) {
  .ext-grid { grid-template-columns: 1fr; }
  .friend-logo { width: 130px; height: 46px; }
  .friend-desc { white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
}

/* ---------------- 下载页 ---------------- */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.dl-card { padding: 26px 24px; display: flex; flex-direction: column; }
.dl-head { display: flex; align-items: center; gap: 15px; margin-bottom: 14px; }
.dl-head h3 { font-size: 1.02rem; }
.dl-logo {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: .72rem; font-weight: 800;
  flex-shrink: 0;
}
.dl-win   { color: #7dd3fc; background: rgba(56, 189, 248, .1); border: 1px solid rgba(56, 189, 248, .3); }
.dl-glibc { color: #c4b5fd; background: rgba(139, 92, 246, .1); border: 1px solid rgba(139, 92, 246, .32); }
.dl-musl  { color: var(--green); background: rgba(52, 211, 153, .09); border: 1px solid rgba(52, 211, 153, .3); }
.dl-meta { font-family: var(--font-mono); font-size: .72rem; color: var(--dim); }
.dl-desc { font-size: .87rem; color: var(--muted); margin-bottom: 16px; flex: 1; }
.dl-info {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-bottom: 16px; padding: 9px 12px;
  background: rgba(6, 10, 19, .65); border: 1px solid var(--border); border-radius: 9px;
}
.dl-info span { font-size: .8rem; color: var(--text); font-weight: 600; white-space: nowrap; }
.dl-info code {
  font-size: .72rem; color: var(--dim); background: none; border: none; padding: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.dl-sha { margin-top: 12px; font-size: .72rem; color: var(--dim); text-align: center; }
.dl-sha code { color: var(--dim); background: none; border: none; padding: 0; font-size: .72rem; }
.callout-warn { border-color: rgba(251, 191, 36, .3); background: rgba(251, 191, 36, .05); }
@media (max-width: 1080px) {
  .dl-grid { grid-template-columns: 1fr; max-width: 620px; }
}

/* ---------------- 滚动显现 ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease) var(--d, 0s),
              transform .7s var(--ease) var(--d, 0s);
}
.reveal.in-view { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-term { max-width: 620px; }
  .reload-grid { grid-template-columns: 1fr; }
  .bench-grid { grid-template-columns: 1fr; }
  .deploy-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
  .app-shot img { min-height: 0; }
  .hero-stats { grid-template-columns: repeat(2, auto); gap: 20px 42px; }
}
@media (max-width: 1000px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
}
/* 俄文标签更长：更早折叠进抽屉，并略微收紧链接内距 */
html[lang="ru"] .nav-links a { padding: 8px 10px; }
@media (max-width: 1180px) {
  html[lang="ru"] .nav-links { display: none; }
  html[lang="ru"] .nav-burger { display: flex; }
}
@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .hero { padding-top: calc(var(--nav-h) + 48px); }
  .feature-grid { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: 1fr 1fr; }
  .bar-row { grid-template-columns: 76px 1fr 52px; gap: 9px; }
  .code-panel { padding: 18px 16px; }
  .container { padding: 0 18px; }
  /* 表格窄屏横向滚动，防止撑破视口 */
  .doc-table { display: block; overflow-x: auto; }
}
@media (max-width: 640px) {
  .book-sum table { display: block; overflow-x: auto; }
}

/* ---------------- 动效偏好 ---------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   文档子页（guide / api）样式
   ============================================================ */

/* ---------- 子页头部 ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 64px) 0 48px;
  overflow: clip;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(ellipse 55% 70% at 30% 0%, rgba(34, 211, 238, .08), transparent),
    radial-gradient(ellipse 45% 60% at 85% 10%, rgba(139, 92, 246, .07), transparent);
}
.page-hero h1 {
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  font-weight: 800; letter-spacing: -.015em;
  margin-bottom: 12px;
}
.page-hero p { color: var(--muted); font-size: 1.02rem; max-width: 46em; }
.page-hero .badge { margin-bottom: 18px; }

.breadcrumb {
  display: flex; align-items: center; gap: 10px;
  font-size: .84rem; color: var(--dim);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--cyan-soft); }
.breadcrumb .sep { opacity: .5; }

/* ---------- 文档布局：侧边目录 + 内容 ---------- */
.docs-layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 48px;
  padding: 48px 0 96px;
  align-items: start;
}

.toc {
  position: sticky; top: calc(var(--nav-h) + 24px);
  max-height: calc(100vh - var(--nav-h) - 60px);
  overflow-y: auto;
  scrollbar-width: thin;
  min-width: 0;   /* 移动端横排时允许在 grid 内收缩 */
  padding-left: 2px;
  padding-right: 6px;
}
.toc-title {
  font-family: var(--font-mono);
  font-size: .72rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 12px; padding-left: 14px;
}
.toc a {
  display: block;
  color: var(--muted); text-decoration: none;
  font-size: .86rem; line-height: 1.5;
  padding: 6px 14px;
  border-left: 2px solid transparent;
  border-radius: 0 8px 8px 0;
  transition: color .2s, border-color .2s, background .2s;
}
.toc a:hover { color: var(--text); background: var(--surface); }
.toc a.active {
  color: var(--cyan-soft);
  border-left-color: var(--cyan);
  background: rgba(34, 211, 238, .06);
}

/* ---------- 文档正文 ---------- */
.doc-content { min-width: 0; }
.doc-section { margin-bottom: 64px; scroll-margin-top: calc(var(--nav-h) + 24px); }
.doc-section > h2 {
  font-size: 1.5rem; font-weight: 800; letter-spacing: -.01em;
  padding-bottom: 12px; margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.doc-section > h3 {
  font-size: 1.12rem; font-weight: 700;
  margin: 34px 0 14px;
}
.doc-section > h4 { font-size: .98rem; font-weight: 700; margin: 24px 0 10px; color: var(--cyan-soft); }
.doc-section p { color: var(--muted); margin-bottom: 14px; font-size: .95rem; }
.doc-section p strong, .doc-section li strong { color: var(--text); font-weight: 600; }
.doc-section ul, .doc-section ol { color: var(--muted); padding-left: 22px; margin-bottom: 14px; font-size: .95rem; }
.doc-section li { margin-bottom: 6px; }
.doc-section li code { white-space: normal; }

/* ---------- 文档表格 ---------- */
.doc-table {
  width: 100%; border-collapse: collapse;
  font-size: .86rem;
  margin: 14px 0 22px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.doc-table th {
  text-align: left; font-weight: 600;
  color: var(--text);
  background: rgba(148, 163, 184, .07);
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.doc-table td {
  padding: 10px 16px;
  color: var(--muted);
  border-bottom: 1px solid rgba(148, 163, 184, .08);
  vertical-align: top;
}
.doc-table tr:last-child td { border-bottom: none; }
.doc-table td:first-child { white-space: nowrap; }
.doc-table td code, .doc-table th code { font-size: .8rem; }

/* ---------- 提示框 ---------- */
.callout {
  display: flex; gap: 13px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 15px 18px;
  margin: 18px 0;
  font-size: .88rem;
  color: var(--muted);
  background: var(--surface);
}
.callout svg { width: 19px; height: 19px; flex-shrink: 0; margin-top: 2px; }
.callout strong { color: var(--text); }
.callout.note { border-color: rgba(34, 211, 238, .3); background: rgba(34, 211, 238, .05); }
.callout.note svg { color: var(--cyan); }
.callout.warn { border-color: rgba(251, 191, 36, .3); background: rgba(251, 191, 36, .05); }
.callout.warn svg { color: var(--amber); }

/* ---------- 文档代码块 ---------- */
.doc-section pre.code-block {
  background: #0a101c;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
  font-family: var(--font-mono);
  font-size: .82rem; line-height: 1.75;
  color: #c3cdda;
  overflow-x: auto;
  margin: 14px 0 22px;
  tab-size: 4;
}
.doc-section pre.code-block code { background: none; border: none; padding: 0; color: inherit; white-space: pre; }

/* ---------- API 卡片网格 ---------- */
.api-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 14px 0 24px;
}
.api-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 17px;
  background: linear-gradient(180deg, rgba(148,163,184,.05), rgba(148,163,184,.022));
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.api-card:hover { border-color: var(--border-hi); transform: translateY(-2px); }
.api-card h4 {
  font-family: var(--font-mono);
  font-size: .84rem; font-weight: 600;
  color: var(--cyan-soft);
  margin-bottom: 5px;
  word-break: break-all;
}
.api-card p { font-size: .82rem; color: var(--muted); margin: 0; line-height: 1.6; }
.api-card p code { font-size: .76rem; }

/* ---------- 领域分组网格 ---------- */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 14px 0 24px;
}
.domain-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  background: linear-gradient(180deg, rgba(148,163,184,.05), rgba(148,163,184,.022));
}
.domain-card h4 {
  font-size: .92rem; font-weight: 700; color: var(--text);
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 8px;
}
.domain-card h4 .cnt {
  font-family: var(--font-mono);
  font-size: .72rem; font-weight: 600; color: var(--cyan);
}
.domain-card p { font-size: .8rem; color: var(--dim); margin: 0; line-height: 1.65; }

/* ---------- 文档页响应式 ---------- */
@media (max-width: 1080px) {
  .docs-layout { grid-template-columns: 1fr; gap: 0; padding-top: 24px; }
  .toc {
    position: sticky; top: var(--nav-h);
    z-index: 50;
    display: flex; align-items: center; gap: 4px;
    max-height: none; overflow-x: auto; overflow-y: hidden;
    padding: 10px 0 12px;
    margin-bottom: 10px;
    background: rgba(6, 10, 19, .92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    scrollbar-width: none;
  }
  .toc::-webkit-scrollbar { display: none; }
  .toc-title { display: none; }
  .toc a {
    white-space: nowrap;
    border-left: none;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 5px 14px;
  }
  .toc a.active { border-color: rgba(34, 211, 238, .45); }
  .domain-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 780px) {
  .api-grid { grid-template-columns: 1fr; }
  .domain-grid { grid-template-columns: 1fr; }
}

/* ---------------- 焦点可达性 ---------------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ============================================================
   搜索组件（P4）：Ctrl+K 覆盖层 + API 页 hero 搜索框
   ============================================================ */
.search-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: none;
  background: rgba(4, 7, 14, .72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.search-overlay.open { display: flex; justify-content: center; align-items: flex-start; padding-top: 12vh; }
.search-panel {
  width: min(680px, calc(100vw - 40px));
  background: #0c1322;
  border: 1px solid rgba(103, 232, 249, .28);
  border-radius: 16px;
  box-shadow: 0 30px 90px -20px rgba(2, 6, 17, .95),
              0 0 60px -20px rgba(34, 211, 238, .3);
  overflow: hidden;
}
.search-row {
  display: flex; align-items: center; gap: 13px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--border);
}
.search-row svg { width: 19px; height: 19px; color: var(--cyan); flex-shrink: 0; }
.search-row input {
  flex: 1;
  background: none; border: none; outline: none;
  font-family: var(--font-ui);
  font-size: 1rem; color: var(--text);
}
.search-row input::placeholder { color: var(--dim); }
kbd {
  font-family: var(--font-mono);
  font-size: .68rem; color: var(--muted);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  background: var(--surface);
}
.search-list { max-height: 46vh; overflow-y: auto; scrollbar-width: thin; }
.search-empty {
  padding: 34px 20px; text-align: center;
  font-size: .88rem; color: var(--dim);
}
.search-empty code { font-size: .8rem; }
.search-item {
  display: grid;
  grid-template-columns: 92px 1fr;
  grid-template-areas: "g t" "g d";
  column-gap: 14px;
  padding: 10px 18px;
  cursor: pointer;
  border-left: 2px solid transparent;
}
.search-item.active { background: rgba(34, 211, 238, .07); border-left-color: var(--cyan); }
.search-group {
  grid-area: g;
  font-family: var(--font-mono);
  font-size: .68rem; color: var(--dim);
  padding-top: 3px;
}
.search-title { grid-area: t; font-size: .9rem; color: var(--text); line-height: 1.45; word-break: break-all; }
.search-item.active .search-title { color: var(--cyan-soft); }
.search-title mark {
  background: rgba(34, 211, 238, .25);
  color: #a5f3fc; border-radius: 3px; padding: 0 2px;
}
.search-desc { grid-area: d; font-size: .76rem; color: var(--dim); margin-top: 2px; }
.search-foot {
  display: flex; gap: 20px; align-items: center;
  padding: 9px 18px;
  border-top: 1px solid var(--border);
  font-size: .72rem; color: var(--dim);
}
.search-foot span { display: inline-flex; gap: 5px; align-items: center; }
.search-cnt { margin-left: auto; color: var(--muted); }

/* API 页 hero 搜索框 */
.hero-search {
  margin-top: 26px;
  display: flex; align-items: center; gap: 13px;
  max-width: 560px;
  background: rgba(6, 10, 19, .7);
  border: 1px solid rgba(103, 232, 249, .3);
  border-radius: 13px;
  padding: 13px 18px;
  cursor: pointer;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.hero-search:hover {
  border-color: rgba(103, 232, 249, .55);
  box-shadow: 0 0 34px -12px rgba(34, 211, 238, .45);
}
.hero-search svg { width: 18px; height: 18px; color: var(--cyan); flex-shrink: 0; }
.hero-search .hs-hint { flex: 1; font-size: .92rem; color: var(--dim); }
.hero-search kbd { margin-left: auto; }