/* ============================================================
   太墟 TaiXu 官网 · 设计系统
   风格：极简留白 + 细边框网格 + 衬线大标题 + 单一强调色
   ============================================================ */

:root {
  --bg: #fafafa;
  --bg-soft: #f4f4f5;
  --surface: #ffffff;
  --ink: #18181b;
  --ink-2: #52525b;
  --ink-3: #8e8e96;
  --line: #e4e4e7;
  --line-soft: #ececee;
  --accent: #a3e635;
  --accent-ink: #1a2e05;
  --accent-soft: rgba(163, 230, 53, 0.14);
  --code-bg: #f4f4f5;
  --shadow-nav: 0 8px 30px rgba(0, 0, 0, 0.07);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 12px 40px rgba(0, 0, 0, 0.05);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong",
    "SimSun", Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --wrap: 1120px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0b0b0c;
  --bg-soft: #131315;
  --surface: #151517;
  --ink: #f4f4f5;
  --ink-2: #a1a1aa;
  --ink-3: #71717a;
  --line: #26262a;
  --line-soft: #1e1e21;
  --accent-soft: rgba(163, 230, 53, 0.12);
  --code-bg: #1a1a1d;
  --shadow-nav: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 40px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; font-weight: 700; letter-spacing: 0.01em; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: 0.88em; background: var(--code-bg); border: 1px solid var(--line-soft); border-radius: 6px; padding: 0.1em 0.4em; }
pre { margin: 0 0 1.25em; padding: 1.1em 1.25em; background: var(--code-bg); border: 1px solid var(--line-soft); border-radius: var(--radius-sm); overflow-x: auto; }
pre code { background: none; border: none; padding: 0; font-size: 0.86rem; line-height: 1.7; }
table { width: 100%; border-collapse: collapse; margin: 0 0 1.25em; font-size: 0.94rem; }
th, td { text-align: left; padding: 0.65em 0.9em; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--ink-2); background: var(--bg-soft); }
ul, ol { margin: 0 0 1.25em; padding-left: 1.4em; }
li { margin-bottom: 0.4em; }
hr { border: none; border-top: 1px solid var(--line); margin: 2.5em 0; }

::selection { background: var(--accent); color: var(--accent-ink); }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--bg); padding: 0.5em 1em; border-radius: 0 0 8px 0; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- 悬浮胶囊导航 ---------- */
.site-header {
  position: sticky; top: 16px; z-index: 50;
  width: min(var(--wrap), calc(100% - 32px));
  margin: 16px auto 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px 8px 18px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-nav);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark img { width: 26px; height: 26px; }
html[data-theme="dark"] .brand-mark img { content: url("assets/taixu-mark-white.png"); }
.brand-name { font-size: 1.05rem; letter-spacing: 0.06em; }
.brand-roman { font-size: 0.7rem; letter-spacing: 0.22em; color: var(--ink-3); font-weight: 500; }
.site-nav { display: flex; align-items: center; gap: 4px; position: relative; }
.site-nav > a {
  padding: 7px 14px; border-radius: 999px; font-size: 0.92rem; color: var(--ink-2);
  transition: color 0.15s, background 0.15s;
}
.site-nav > a:hover { color: var(--ink); background: var(--bg-soft); }
.site-nav > a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.nav-github { display: inline-flex; align-items: center; gap: 6px; }
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; margin-left: 6px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); color: var(--ink-2); cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.theme-toggle:hover { border-color: var(--ink-3); color: var(--ink); }
.theme-toggle svg { width: 16px; height: 16px; }
.menu-toggle { display: none; }

/* 移动端导航 */
@media (max-width: 860px) {
  .menu-toggle {
    display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
    width: 38px; height: 38px; margin-left: 8px;
    background: none; border: 1px solid var(--line); border-radius: 999px; cursor: pointer;
  }
  .menu-toggle span { display: block; width: 15px; height: 1.6px; background: var(--ink); transition: transform 0.2s; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.3px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.3px) rotate(-45deg); }
  .site-nav {
    display: none;
    position: absolute; top: calc(100% + 8px); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 10px;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
    box-shadow: var(--shadow-nav);
  }
  .site-nav.open { display: flex; }
  .site-nav > a { padding: 10px 14px; border-radius: var(--radius-sm); }
}

/* ---------- 通用布局 ---------- */
.wrap { width: min(var(--wrap), calc(100% - 48px)); margin: 0 auto; }
.section-pad { padding: 96px 0; }
.section-index {
  font-size: 0.78rem; letter-spacing: 0.18em; color: var(--ink-3);
  text-transform: uppercase; margin-bottom: 14px; font-weight: 600;
}
.section-heading { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-heading h2 { font-family: var(--serif); font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 700; }
.section-heading p { color: var(--ink-2); font-size: 1.02rem; }

/* ---------- 按钮 ---------- */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 999px;
  font-size: 0.98rem; font-weight: 600; line-height: 1.2; cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s, background 0.15s;
}
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }
.button-primary { background: var(--accent); color: var(--accent-ink); }
.button-primary:hover { box-shadow: 0 8px 24px rgba(163, 230, 53, 0.35); }
.button-quiet { background: var(--surface); color: var(--ink); border-color: var(--line); }
.button-quiet:hover { border-color: var(--ink-3); }
.button-outline { background: transparent; color: var(--ink); border-color: var(--line); }
.button-outline:hover { border-color: var(--ink-3); }
.button-sm { padding: 8px 16px; font-size: 0.88rem; }
.text-link { color: var(--ink); font-weight: 600; border-bottom: 1px solid var(--ink-3); transition: border-color 0.15s; }
.text-link:hover { border-color: var(--accent); }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 72px; text-align: center; }
.hero-badge {
  display: inline-block; padding: 6px 14px; margin-bottom: 28px;
  border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.85rem; color: var(--ink-2); background: var(--surface);
}
.hero h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  letter-spacing: 0.02em; margin-bottom: 22px;
}
.hero-lead { max-width: 620px; margin: 0 auto 34px; color: var(--ink-2); font-size: clamp(1rem, 2vw, 1.15rem); }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-meta {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px;
  margin-top: 30px; font-size: 0.85rem; color: var(--ink-3);
}
.hero-meta i { width: 3px; height: 3px; border-radius: 50%; background: var(--ink-3); }
.hero-showcase { margin: 64px auto 0; position: relative; max-width: 980px; }
.hero-stage {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 50% 0%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 62%),
    linear-gradient(180deg, var(--bg-soft), var(--surface));
  overflow: hidden;
  display: flex; justify-content: center; align-items: flex-end;
  gap: 32px;
  padding: 64px 24px 0;
}
.hero-phone {
  width: min(300px, 62%);
  margin: 0;
  border-radius: 34px 34px 0 0;
  border: 1px solid var(--line); border-bottom: none;
  overflow: hidden;
  box-shadow: 0 -24px 60px rgba(0, 0, 0, 0.18);
  position: relative; z-index: 2;
  background: var(--bg-soft);
}
.hero-phone img { width: 100%; margin-bottom: -2px; }
.hero-phone.is-back {
  position: absolute; z-index: 1;
  left: 7%; bottom: -70px;
  width: 268px;
  transform: rotate(-8deg);
  opacity: 0.92;
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.14);
}
.hero-float-note {
  position: absolute; left: 20px; top: 20px;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line); font-size: 0.8rem; color: var(--ink-2);
  z-index: 3;
}
.hero-float-note span { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
@media (max-width: 720px) {
  .hero-stage { padding: 44px 16px 0; }
  .hero-phone.is-back { display: none; }
}

/* ---------- 功能网格（细边框） ---------- */
.feature-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  background: var(--line-soft); gap: 1px;
}
.feature-cell { background: var(--surface); padding: 30px 26px; transition: background 0.2s; }
.feature-cell:hover { background: color-mix(in srgb, var(--accent-soft) 35%, var(--surface)); }
.feature-cell h3 { font-size: 1.02rem; margin-bottom: 8px; }
.feature-cell p { margin: 0; font-size: 0.9rem; color: var(--ink-2); line-height: 1.7; }
.feature-cell .cell-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; margin-bottom: 16px;
  border: 1px solid var(--line); border-radius: 11px;
  background: var(--bg-soft); color: var(--ink);
  font-size: 1.05rem;
}
@media (max-width: 1000px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }

/* ---------- 图文交替区 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split.reverse .split-copy { order: 2; }
.split.reverse .split-media { order: 1; }
.split-copy .kicker { font-size: 0.8rem; letter-spacing: 0.18em; color: var(--ink-3); text-transform: uppercase; font-weight: 600; margin-bottom: 14px; }
.split-copy h2 { font-family: var(--serif); font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 16px; }
.split-copy > p { color: var(--ink-2); margin-bottom: 22px; }
.split-points { list-style: none; padding: 0; margin: 0 0 26px; }
.split-points li { padding: 14px 0; border-top: 1px solid var(--line-soft); }
.split-points li:last-child { border-bottom: 1px solid var(--line-soft); }
.split-points b { display: block; font-size: 0.97rem; margin-bottom: 3px; }
.split-points span { font-size: 0.9rem; color: var(--ink-2); }
.split-media figure {
  margin: 0; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-card);
  aspect-ratio: 1 / 1.08;
}
.split-media img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 36px; }
  .split.reverse .split-copy { order: 1; }
  .split.reverse .split-media { order: 2; }
}

/* ---------- 工作流示意条 ---------- */
.flow-strip {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px;
  padding: 34px 24px; margin-top: 8px;
  border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface);
}
.flow-chip { padding: 12px 20px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--bg); text-align: center; }
.flow-chip small { display: block; font-size: 0.72rem; letter-spacing: 0.1em; color: var(--ink-3); margin-bottom: 2px; }
.flow-chip b { font-size: 0.94rem; }
.flow-arrow { color: var(--ink-3); font-size: 1.1rem; }
.flow-chip.is-accent { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); background: var(--accent-soft); }

/* ---------- 数字亮点条 ---------- */
.stat-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden;
  background: var(--line-soft);
}
.stat-cell { background: var(--surface); padding: 28px 24px; text-align: center; }
.stat-cell b { display: block; font-family: var(--serif); font-size: 1.9rem; margin-bottom: 4px; }
.stat-cell span { font-size: 0.86rem; color: var(--ink-2); }
@media (max-width: 800px) { .stat-strip { grid-template-columns: repeat(2, 1fr); } }

/* ---------- CTA ---------- */
.cta { text-align: center; padding: 110px 0; }
.cta h2 { font-family: var(--serif); font-size: clamp(1.9rem, 4vw, 2.8rem); margin-bottom: 14px; }
.cta p { color: var(--ink-2); margin-bottom: 34px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 52px 0 40px; }
.footer-inner { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-brand strong { display: block; font-size: 1.1rem; }
.footer-brand span { font-size: 0.78rem; letter-spacing: 0.16em; color: var(--ink-3); }
.footer-tagline { color: var(--ink-2); font-size: 0.92rem; margin-top: 10px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; font-size: 0.92rem; }
.footer-links a { color: var(--ink-2); transition: color 0.15s; }
.footer-links a:hover { color: var(--ink); }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line-soft); text-align: center; font-size: 0.82rem; color: var(--ink-3); }

/* ---------- 教程页（插件 / 模板）复用布局 ---------- */
.docs-page main { width: min(920px, calc(100% - 48px)); margin: 0 auto; }
.docs-hero { padding: 72px 0 48px; max-width: 720px; }
.docs-hero h1 { font-family: var(--serif); font-size: clamp(2rem, 4.5vw, 2.9rem); }
.docs-hero p { color: var(--ink-2); font-size: 1.05rem; }
.docs-layout { display: grid; grid-template-columns: 200px 1fr; gap: 48px; align-items: start; padding-bottom: 96px; }
.docs-layout > * { min-width: 0; }
.docs-toc {
  position: sticky; top: 96px;
  display: flex; flex-direction: column; gap: 8px;
  font-size: 0.88rem;
}
.docs-toc b { font-size: 0.78rem; letter-spacing: 0.14em; color: var(--ink-3); text-transform: uppercase; margin-bottom: 6px; }
.docs-toc a { color: var(--ink-2); padding: 3px 0; transition: color 0.15s; }
.docs-toc a:hover { color: var(--ink); }
.docs-content section { padding-bottom: 40px; margin-bottom: 40px; border-bottom: 1px solid var(--line-soft); }
.docs-content section:last-child { border-bottom: none; }
.docs-content h2 { font-family: var(--serif); font-size: 1.5rem; margin-bottom: 18px; }
.callout {
  padding: 14px 18px; border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  background: var(--accent-soft); color: var(--ink);
  font-size: 0.92rem;
}
@media (max-width: 800px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-toc { position: static; flex-direction: row; flex-wrap: wrap; gap: 4px 14px; }
}

/* ---------- 入场动画 ---------- */
.reveal-on .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-on .reveal.is-visible { opacity: 1; transform: none; }
.reveal-on .reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal-on .reveal[data-delay="2"] { transition-delay: 0.24s; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-on .reveal { opacity: 1; transform: none; transition: none; }
}