/* =====================================================
   ModelBridge 官网样式
   - 暗色 / 浅色双主题
   - 响应式
   - 视觉风格：现代 · 干净 · 工程感
   ===================================================== */

/* ---------- 主题变量 ---------- */
:root {
  --font-sans: "Inter", "Helvetica Neue", "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "Fira Code", "SFMono-Regular",
    Consolas, "Liberation Mono", monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --max-w: 1200px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px -10px rgba(0, 0, 0, 0.18);
  --shadow-lg: 0 24px 60px -24px rgba(0, 0, 0, 0.35);

  --grad: linear-gradient(135deg, #7c5cff 0%, #22d3ee 100%);
  --grad-soft: linear-gradient(135deg, rgba(124, 92, 255, 0.18), rgba(34, 211, 238, 0.18));
}

/* 暗色（默认） */
html[data-theme="dark"] {
  --bg: #0b0d12;
  --bg-elev-1: #11141b;
  --bg-elev-2: #161a23;
  --bg-elev-3: #1c2230;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e8eaf0;
  --text-dim: #a8b0c0;
  --text-mute: #7c8499;
  --primary: #7c5cff;
  --primary-2: #22d3ee;
  --primary-ink: #0b0d12;
  /* 代码块：暖色软底，配深色字 */
  --code-bg: #f6f0e6;
  --code-fg: #2a2418;
  --code-comment: #8a7e6a;
  --code-prompt: #6c5a3e;
  --code-cmd: #1f1a10;
  --code-string: #6b4f1d;
  --code-accent: #8a4a1f;
  --code-border: rgba(0, 0, 0, 0.08);
  /* 内联 code */
  --inline-code-bg: rgba(124, 92, 255, 0.12);
  --inline-code-fg: #c7bdff;
  /* 终端演示（保留深色，模拟真实终端） */
  --terminal-bg: #0a0d12;
  --terminal-bar: #11141b;
  --selection-bg: rgba(124, 92, 255, 0.35);
  color-scheme: dark;
}

/* 浅色 */
html[data-theme="light"] {
  --bg: #f7f8fc;
  --bg-elev-1: #ffffff;
  --bg-elev-2: #ffffff;
  --bg-elev-3: #f1f3f9;
  --line: rgba(15, 20, 40, 0.08);
  --line-strong: rgba(15, 20, 40, 0.16);
  --text: #0f1428;
  --text-dim: #3a4358;
  --text-mute: #6b7388;
  --primary: #5b46e0;
  --primary-2: #0ea5b7;
  --primary-ink: #ffffff;
  --code-bg: #f5efe2;
  --code-fg: #2a2418;
  --code-comment: #8a7e6a;
  --code-prompt: #6c5a3e;
  --code-cmd: #1f1a10;
  --code-string: #6b4f1d;
  --code-accent: #8a4a1f;
  --code-border: rgba(15, 20, 40, 0.08);
  --inline-code-bg: rgba(91, 70, 224, 0.10);
  --inline-code-fg: #4338ca;
  --terminal-bg: #0a0d12;
  --terminal-bar: #11141b;
  --selection-bg: rgba(91, 70, 224, 0.18);
  color-scheme: light;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}
::selection {
  background: var(--selection-bg);
  color: var(--text);
}
img,
svg {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 0.15em 0.45em;
  background: var(--inline-code-bg);
  color: var(--inline-code-fg);
  border-radius: 6px;
  font-weight: 500;
}
pre code {
  padding: 0;
  background: transparent;
  border-radius: 0;
  color: inherit;
  font-weight: inherit;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--primary);
  color: var(--primary-ink);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 1000;
}
.skip-link:focus {
  top: 16px;
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.3s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark img {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: block;
  box-shadow: 0 2px 8px -2px rgba(0, 0, 0, 0.25);
}
.site-footer .brand-mark img {
  width: 22px;
  height: 22px;
  border-radius: 6px;
}

/* Hero 大图标 */
.hero-brand {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 18px;
}
.hero-brand img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: 0 16px 40px -16px rgba(124, 92, 255, 0.6),
    0 4px 12px -2px rgba(0, 0, 0, 0.2);
  flex: 0 0 auto;
}
.hero-brand .eyebrow { margin-bottom: 0; }

/* 安装页主/次卡片 */
.install-primary {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--line));
  background: linear-gradient(180deg,
    color-mix(in srgb, var(--primary) 6%, var(--bg-elev-1)),
    var(--bg-elev-1) 60%);
  position: relative;
}
.install-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: 0 24px 60px -28px rgba(124, 92, 255, 0.5);
}
.install-secondary {
  opacity: 0.95;
}
.install-tag {
  margin-bottom: 6px;
}
.badge.recommend {
  background: var(--grad);
  color: var(--primary-ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
}
.install-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}
.install-cta .btn.lg {
  padding: 14px 20px;
  font-size: 16px;
  border-radius: 12px;
}

/* 高级折叠 */
.install-advanced {
  margin-top: 16px;
  background: var(--bg-elev-1);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  padding: 14px 20px;
}
.install-advanced summary {
  cursor: pointer;
  list-style: none;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.install-advanced summary::-webkit-details-marker { display: none; }
.install-advanced summary::before {
  content: "▸";
  color: var(--primary-2);
  transition: transform 0.2s ease;
  font-size: 14px;
}
.install-advanced[open] summary::before { transform: rotate(90deg); }
.install-advanced-body {
  padding-top: 12px;
  margin-top: 12px;
  border-top: 1px dashed var(--line);
}
.brand-text {
  font-size: 18px;
}
.brand-text strong {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links {
  display: flex;
  gap: 6px;
}
.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--bg-elev-3);
}
.nav-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}
.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  border: 1px solid var(--line);
  background: var(--bg-elev-1);
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.icon-btn:hover {
  color: var(--text);
  border-color: var(--line-strong);
}
.nav-toggle {
  display: none;
}

/* theme toggle: show one icon */
html[data-theme="dark"] .i-sun { display: inline; }
html[data-theme="dark"] .i-moon { display: none; }
html[data-theme="light"] .i-sun { display: none; }
html[data-theme="light"] .i-moon { display: inline; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}
.btn.lg {
  padding: 12px 18px;
  font-size: 15px;
  border-radius: 12px;
}
.btn-primary {
  background: var(--grad);
  color: var(--primary-ink);
  box-shadow: 0 8px 24px -10px rgba(124, 92, 255, 0.6);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -10px rgba(124, 92, 255, 0.7);
}
.btn-ghost {
  background: var(--bg-elev-1);
  border-color: var(--line);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--line-strong);
  background: var(--bg-elev-2);
}

/* ---------- 通用 section ---------- */
.section {
  padding: 96px 0;
  position: relative;
}
.section-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--grad-soft);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  margin-bottom: 16px;
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-2);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.18);
}
h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.section-sub {
  color: var(--text-dim);
  font-size: 17px;
  margin: 0;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(124, 92, 255, 0.18), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(34, 211, 238, 0.14), transparent 60%),
    radial-gradient(800px 600px at 50% 100%, rgba(124, 92, 255, 0.08), transparent 60%);
  z-index: 0;
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.title {
  font-size: clamp(36px, 5.4vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 18px 0 18px;
  font-weight: 800;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 0 28px;
}
.lede code {
  font-size: 0.85em;
}
.hero-cta {
  display: flex;
  gap: 12px;
  margin: 28px 0 24px;
  flex-wrap: wrap;
}
.hero-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.hero-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.check {
  color: var(--primary-2);
  font-weight: 700;
}

/* 终端 */
.hero-demo {
  position: relative;
  display: grid;
  gap: 18px;
}
.terminal {
  background: var(--terminal-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
  color: #d8e0ec;
  transform: translateZ(0);
}
.terminal-side {
  transform: translateX(20px);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--terminal-bar);
  border-bottom: 1px solid var(--line);
}
.terminal-bar .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #4a5160;
}
.terminal-bar .dot.red { background: #ff5f57; }
.terminal-bar .dot.yellow { background: #febc2e; }
.terminal-bar .dot.green { background: #28c840; }
.terminal-title {
  margin-left: 8px;
  font-size: 12px;
  color: #8a93a6;
  letter-spacing: 0.02em;
}
.terminal-body {
  margin: 0;
  padding: 18px 18px 22px;
  white-space: pre;
  overflow-x: auto;
  line-height: 1.55;
}
.t-prompt { color: #6c7793; }
.t-cmd    { color: #e6edf3; }
.t-out    { color: #8a93a6; }
.t-emph   { color: #22d3ee; }
.t-you    { color: #7c5cff; font-weight: 600; }
.t-tool   { color: #f0a868; }

/* 数据条 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 24px;
  padding-bottom: 24px;
}
.stat {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.stat:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.stat-num {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
}
.stat-label {
  margin-top: 4px;
  color: var(--text-mute);
  font-size: 13px;
}

/* ---------- 能力卡片 ---------- */
.grid.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.card:hover::before { opacity: 0.4; }
.card-icon {
  font-size: 26px;
  margin-bottom: 10px;
}
.card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.55;
}

/* ---------- 两个组件 ---------- */
.grid.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.panel {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.panel:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-ink);
  background: var(--grad);
  padding: 4px 10px;
  border-radius: 999px;
}
.badge.alt {
  background: linear-gradient(135deg, #22d3ee, #10b981);
}
.panel h3 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.panel h3 small {
  font-weight: 400;
  color: var(--text-mute);
  font-size: 14px;
  margin-left: 4px;
}
.panel-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.panel-list li {
  padding-left: 18px;
  position: relative;
  line-height: 1.55;
}
.panel-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary-2);
}
.panel-list strong { color: var(--text); }
.panel-foot { margin-top: 6px; }

/* ---------- 架构 ---------- */
.arch {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px;
  align-items: start;
}
.arch-layer {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: grid;
  gap: 8px;
}
.arch-row {
  display: flex;
  align-items: stretch;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.arch-box {
  background: var(--bg-elev-3);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  min-width: 110px;
  flex: 1 1 110px;
}
.arch-box small {
  display: block;
  font-weight: 400;
  color: var(--text-mute);
  font-size: 12px;
  margin-top: 2px;
}
.arch-box.alt { background: linear-gradient(180deg, rgba(34, 211, 238, 0.10), transparent); }
.arch-box.wide { flex: 1 1 100%; }
.arch-box.highlight {
  background: var(--grad);
  color: var(--primary-ink);
  border-color: transparent;
}
.arch-box.highlight small { color: rgba(11, 13, 18, 0.7); }
.arch-sep {
  width: 18px;
  align-self: center;
  text-align: center;
  color: var(--text-mute);
}
.arch-arrow {
  text-align: center;
  color: var(--text-mute);
  font-size: 18px;
  line-height: 1;
}
.arch-side {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.arch-side h3 {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.arch-side ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-dim);
}
.arch-side li strong { color: var(--text); }
.arch-note {
  margin-top: 20px;
  text-align: center;
  color: var(--text-mute);
  font-size: 14px;
}

/* ---------- 快速开始 ---------- */
.steps {
  display: grid;
  gap: 18px;
  max-width: 880px;
  margin: 0 auto;
}
.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  align-items: start;
  transition: border-color 0.2s ease;
}
.step:hover { border-color: var(--line-strong); }
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--grad);
  color: var(--primary-ink);
  font-weight: 800;
  font-size: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px -10px rgba(124, 92, 255, 0.6);
}
.step h3 {
  margin: 0 0 6px;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.step p {
  margin: 0 0 10px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.code {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0;
  border: 1px solid var(--code-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
/* 代码块里的语法标记 */
.code .c-prompt  { color: var(--code-prompt); }
.code .c-cmd     { color: var(--code-cmd); font-weight: 600; }
.code .c-comment { color: var(--code-comment); font-style: italic; }
.code .c-string  { color: var(--code-string); }
.code .c-accent  { color: var(--code-accent); }

.callout {
  margin: 32px auto 0;
  max-width: 880px;
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0;
  overflow: hidden;
}
.callout summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  user-select: none;
}
.callout summary::-webkit-details-marker { display: none; }
.callout summary strong { font-size: 15px; }
.callout summary .hint {
  font-size: 12px;
  color: var(--text-mute);
  border: 1px solid var(--line);
  padding: 2px 8px;
  border-radius: 999px;
}
.callout[open] summary {
  border-bottom: 1px solid var(--line);
}
.callout-body {
  padding: 18px 22px 22px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.callout-body ol {
  padding-left: 20px;
  margin: 0 0 12px;
  display: grid;
  gap: 6px;
}
.callout-body p { margin: 8px 0 0; }
.muted { color: var(--text-mute); }

/* ---------- 模型矩阵 ---------- */
.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.model-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.model-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.model-logo {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad);
  color: var(--primary-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.02em;
}
.model-card h3 {
  margin: 0 0 4px;
  font-size: 15.5px;
}
.model-card p {
  margin: 0 0 6px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.4;
}
.chip {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text-dim);
  background: var(--bg-elev-3);
}
.chip.ok    { color: #22d3ee; border-color: rgba(34, 211, 238, 0.35); }
.chip.free  { color: #10b981; border-color: rgba(16, 185, 129, 0.35); }

/* ---------- 赞助 ---------- */
.sponsor {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 40px;
  position: relative;
  overflow: hidden;
}
.sponsor::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: var(--grad-soft);
  z-index: 0;
  opacity: 0.5;
  pointer-events: none;
}
.sponsor > * { position: relative; z-index: 1; }
.sponsor-text h2 {
  margin-top: 12px;
  margin-bottom: 12px;
  font-size: clamp(24px, 3vw, 32px);
}
.sponsor-text p { color: var(--text-dim); margin: 0 0 14px; font-size: 15.5px; }
.sponsor-text .btn { margin-top: 8px; }

.sponsor-card {
  background: var(--bg-elev-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sponsor-card-inner {
  width: 100%;
}
.sponsor-card-logo {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 12px;
}
.sponsor-card-logo span { color: transparent; }
.sponsor-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-dim);
  display: grid;
  gap: 6px;
  font-size: 14.5px;
}

/* ---------- CTA ---------- */
.cta {
  text-align: center;
  padding: 80px 0;
}
.cta-inner {
  max-width: 760px;
  margin: 0 auto;
}
.cta h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  margin-bottom: 8px;
}
.cta p {
  color: var(--text-dim);
  margin: 0 0 24px;
  font-size: 16px;
}
.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-elev-1);
  padding: 56px 0 24px;
  margin-top: 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
}
.footer-grid h4 {
  margin: 0 0 12px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-mute);
}
.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.footer-grid a {
  color: var(--text-dim);
  font-size: 14.5px;
  transition: color 0.2s ease;
}
.footer-grid a:hover { color: var(--text); }
.footer-grid .muted { font-size: 14px; line-height: 1.6; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--text-mute);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero { padding: 64px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-demo { max-width: 640px; margin: 0 auto; }
  .grid.features { grid-template-columns: repeat(2, 1fr); }
  .grid.two-col  { grid-template-columns: 1fr; }
  .arch { grid-template-columns: 1fr; }
  .model-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .sponsor { grid-template-columns: 1fr; padding: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 72px 0; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-tools .btn-ghost { display: none; }
  .nav-toggle { display: inline-flex; }
  /* 移动端打开 nav */
  body.nav-open .nav-links {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 12px;
    background: var(--bg-elev-1);
    border-bottom: 1px solid var(--line);
    gap: 0;
  }
  body.nav-open .nav-links a {
    padding: 12px;
    border-radius: 8px;
  }
}
@media (max-width: 560px) {
  .grid.features { grid-template-columns: 1fr; }
  .model-grid    { grid-template-columns: 1fr; }
  .footer-grid   { grid-template-columns: 1fr; }
  .stats         { grid-template-columns: 1fr 1fr; }
  .step          { grid-template-columns: 44px 1fr; gap: 14px; }
  .step-num      { width: 38px; height: 38px; font-size: 18px; border-radius: 10px; }
  .title         { font-size: 36px; }
  .lede          { font-size: 16px; }
  .terminal      { font-size: 12px; }
  .terminal-body { padding: 14px; }
  .section { padding: 56px 0; }
  .container { padding: 0 18px; }
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* 焦点可见 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 8px;
}

/* =====================================================
   多页扩展组件
   ===================================================== */

/* 页面头 */
.page-head {
  padding: 80px 0 24px;
  text-align: center;
  position: relative;
}
.page-head h1 {
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 16px auto 14px;
  max-width: 820px;
  font-weight: 800;
}
.page-head h1 code {
  font-size: 0.7em;
  background: var(--inline-code-bg);
  color: var(--inline-code-fg);
  padding: 0.1em 0.5em;
  border-radius: 10px;
}
.page-head .section-sub {
  max-width: 720px;
  margin: 0 auto;
}

/* 导航高亮 */
.nav-links a.active {
  color: var(--text);
  background: var(--bg-elev-3);
}

/* ---------- 安装卡片 ---------- */
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.install-card {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.install-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.install-card-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.install-num {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--grad);
  color: var(--primary-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  box-shadow: 0 6px 20px -8px rgba(124, 92, 255, 0.6);
}
.install-card h3 {
  margin: 0 0 4px;
  font-size: 19px;
  letter-spacing: -0.01em;
}
.install-card h3 small {
  font-weight: 400;
  color: var(--text-mute);
  font-size: 13px;
  margin-left: 6px;
}
.install-card p { margin: 0; }
.install-platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.install-details {
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}
.install-details summary {
  cursor: pointer;
  font-size: 13.5px;
  color: var(--text-dim);
  list-style: none;
  padding: 4px 0;
  user-select: none;
}
.install-details summary::-webkit-details-marker { display: none; }
.install-details summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  color: var(--primary-2);
  transition: transform 0.2s ease;
}
.install-details[open] summary::before { transform: rotate(90deg); }
.install-details[open] summary { color: var(--text); }
.install-details pre.code { margin-top: 10px; }
.install-details ul { padding-left: 18px; margin: 6px 0; }
.file-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--text-dim);
}

.after-install,
.extension-addon {
  margin-top: 64px;
}
.addon-card {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 880px;
  margin: 0 auto;
}
.addon-card ol {
  padding-left: 22px;
  margin: 0 0 12px;
  display: grid;
  gap: 8px;
  color: var(--text-dim);
}
.addon-card ol li { line-height: 1.55; }

.small { font-size: 12.5px; }

/* ---------- 命令网格 ---------- */
.cmd-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.cmd-card {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.cmd-card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.cmd-card h3 {
  margin: 0 0 10px;
  font-size: 15px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.cmd-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--text-dim);
}
.cmd-card li { line-height: 1.5; }
.cmd-card code { font-size: 12.5px; }

/* ---------- 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-elev-1);
  margin: 12px 0 20px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.data-table th,
.data-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.data-table th {
  background: var(--bg-elev-3);
  color: var(--text-mute);
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--bg-elev-3); }
.data-table code { font-size: 12.5px; }

/* ---------- 区块标题 ---------- */
.block-head {
  font-size: 19px;
  margin: 28px 0 12px;
  letter-spacing: -0.01em;
}

/* ---------- 加大终端 ---------- */
.terminal-lg .terminal-body { font-size: 14px; padding: 20px 22px; }

/* ---------- callout 通用 ---------- */
.callout {
  background: var(--bg-elev-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin: 16px 0;
}
.callout strong { display: inline-block; margin-bottom: 6px; }
.callout p { margin: 6px 0 0; color: var(--text-dim); font-size: 14.5px; }
.callout p + p { margin-top: 8px; }
.callout ul { margin: 8px 0 0; padding-left: 20px; color: var(--text-dim); font-size: 14.5px; }
.callout ul li { line-height: 1.55; }
.callout code { font-size: 12.5px; }
.callout.warn {
  background: color-mix(in srgb, #f59e0b 12%, var(--bg-elev-1));
  border-color: color-mix(in srgb, #f59e0b 40%, var(--line));
}
html[data-theme="light"] .callout.warn {
  background: #fff7e6;
  border-color: #f5c47b;
}

/* ---------- 响应式补全 ---------- */
@media (max-width: 960px) {
  .install-grid { grid-template-columns: 1fr; }
  .cmd-grid { grid-template-columns: 1fr; }
  .page-head { padding: 56px 0 16px; }
}
@media (max-width: 560px) {
  .page-head { padding: 40px 0 8px; }
  .install-card { padding: 18px; }
  .data-table { font-size: 13px; }
  .data-table th, .data-table td { padding: 10px 12px; }
}