/* ===========================================================
   通千算智 · 官网样式
   主题：深空蓝 + 青蓝紫渐变，与品牌 logo 一致
   =========================================================== */

:root {
  --bg: #0a1226;
  --bg-2: #0d1a38;
  --bg-3: #0f1f42;
  --panel: #111d38;
  --panel-2: #16233f;
  --border: rgba(148, 180, 255, 0.14);
  --border-strong: rgba(148, 180, 255, 0.28);
  --text: #e8eefb;
  --text-2: #a9bada;
  --text-3: #7c8db0;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #8b5cf6;
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --grad: linear-gradient(100deg, #22d3ee 0%, #3b82f6 55%, #8b5cf6 100%);
  --grad-soft: linear-gradient(120deg, rgba(34, 211, 238, .16), rgba(139, 92, 246, .16));
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 18px 44px -22px rgba(0, 0, 0, .75);
  --header-h: 62px;
  --sidebar-w: 262px;
  --maxw: 1180px;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;
}

html[data-theme="light"] {
  --bg: #f5f8fd;
  --bg-2: #ffffff;
  --bg-3: #eef3fb;
  --panel: #ffffff;
  --panel-2: #f4f7fd;
  --border: rgba(15, 38, 82, .12);
  --border-strong: rgba(15, 38, 82, .24);
  --text: #0d1a33;
  --text-2: #46587a;
  --text-3: #6b7c9c;
  --shadow: 0 16px 40px -26px rgba(13, 26, 51, .45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--cyan); }
img { max-width: 100%; }
code, pre, kbd { font-family: var(--mono); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ── 顶部导航 ───────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 60;
  height: var(--header-h);
  backdrop-filter: saturate(150%) blur(14px);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 22px;
  height: 100%; display: flex; align-items: center; gap: 26px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: .3px; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.brand .tag {
  font-size: 11px; font-weight: 500; color: var(--text-3);
  border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 1px 8px; letter-spacing: .5px;
}
.nav { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav a {
  padding: 7px 13px; border-radius: 8px; font-size: 14.5px; color: var(--text-2);
  transition: .16s;
}
.nav a:hover { color: var(--text); background: var(--panel-2); }
.nav a.active { color: var(--text); background: var(--panel-2); }
.header-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  border-radius: 10px; border: 1px solid var(--border-strong);
  padding: 8px 15px; font-size: 14px; font-weight: 500;
  background: transparent; color: var(--text); transition: .16s; white-space: nowrap;
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-primary {
  background: var(--grad); border: none; color: #04121f; font-weight: 700;
  box-shadow: 0 10px 26px -14px rgba(34, 211, 238, .85);
}
.btn-primary:hover { color: #04121f; filter: brightness(1.08); }
.btn-lg { padding: 12px 24px; font-size: 15.5px; border-radius: 12px; }
.icon-btn {
  width: 36px; height: 36px; display: inline-flex; align-items: center;
  justify-content: center; border-radius: 9px; border: 1px solid var(--border);
  background: transparent; color: var(--text-2); cursor: pointer; font-size: 15px;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }
#menu-toggle { display: none; }

/* ── 首页 Hero ──────────────────────────────────────────── */
.hero { position: relative; overflow: hidden; padding: 78px 0 62px; }
.hero::before {
  content: ""; position: absolute; inset: -30% -10% auto -10%; height: 620px;
  background: radial-gradient(48% 60% at 22% 32%, rgba(34, 211, 238, .20), transparent 70%),
              radial-gradient(42% 56% at 78% 18%, rgba(139, 92, 246, .20), transparent 72%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 46px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2);
  border: 1px solid var(--border); background: var(--panel); border-radius: 999px;
  padding: 5px 13px; margin-bottom: 18px;
}
.eyebrow b { color: var(--cyan); font-weight: 600; }
h1.hero-title {
  font-size: clamp(30px, 4.4vw, 52px); line-height: 1.18; margin: 0 0 20px;
  letter-spacing: -.5px; font-weight: 800;
}
.hero-lead { font-size: 16.5px; color: var(--text-2); margin: 0 0 28px; max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 26px; padding-top: 8px; }
.hero-stats div { font-size: 13px; color: var(--text-3); }
.hero-stats b { display: block; font-size: 21px; color: var(--text); font-weight: 700; }

.shot-wrap { position: relative; }
.shot {
  border-radius: var(--radius); border: 1px solid var(--border-strong);
  box-shadow: var(--shadow); display: block; width: 100%;
}
.shot-glow::after {
  content: ""; position: absolute; inset: 12% 8% -6% 8%; border-radius: 50%;
  background: var(--grad); filter: blur(58px); opacity: .30; z-index: -1;
}

/* ── 通用区块 ───────────────────────────────────────────── */
section.block { padding: 66px 0; }
section.block.alt { background: var(--bg-2); border-block: 1px solid var(--border); }
.block-head { text-align: center; max-width: 760px; margin: 0 auto 40px; }
.block-head h2 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 12px; letter-spacing: -.3px; }
.block-head p { color: var(--text-2); margin: 0; font-size: 15.5px; }

.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 20px 18px; transition: .18s;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.card .ico { font-size: 21px; line-height: 1; margin-bottom: 11px; display: block; }
.card h3 { font-size: 16px; margin: 0 0 7px; font-weight: 650; }
.card p { margin: 0; color: var(--text-2); font-size: 14px; line-height: 1.7; }
a.card { display: block; }
a.card:hover h3 { color: var(--cyan); }

/* 终端 / 代码块 */
.term {
  background: #071022; border: 1px solid var(--border-strong); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
}
.term-head {
  display: flex; align-items: center; gap: 8px; padding: 9px 14px;
  background: #0b1730; border-bottom: 1px solid var(--border); font-size: 12.5px; color: var(--text-3);
}
.term-head .dots { display: flex; gap: 5px; margin-right: 6px; }
.term-head .dots i { width: 9px; height: 9px; border-radius: 50%; background: #2a3a5c; display: block; }
.term-body { padding: 14px 16px; font-family: var(--mono); font-size: 13px; line-height: 1.95; overflow-x: auto; }
.term-body .c { color: #64748b; }
.term-body .p { color: #34d399; }
.term-body .k { color: #7dd3fc; }
.term-body .v { color: #e2e8f5; }

/* 胶囊墙 */
.pills { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.pill {
  border: 1px solid var(--border); background: var(--panel); border-radius: 999px;
  padding: 7px 16px; font-size: 14px; color: var(--text-2);
}
.pill:hover { color: var(--text); border-color: var(--border-strong); }

/* 步骤 */
.steps { counter-reset: s; display: grid; gap: 14px; }
.step {
  display: flex; gap: 15px; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 17px 20px;
}
.step .n {
  flex: none; width: 27px; height: 27px; border-radius: 50%; background: var(--grad);
  color: #04121f; font-weight: 800; font-size: 13.5px; display: grid; place-items: center;
}
.step h3 { margin: 2px 0 5px; font-size: 15.5px; }
.step p { margin: 0; color: var(--text-2); font-size: 14px; }
.step code { background: var(--bg-3); padding: 1.5px 6px; border-radius: 5px; font-size: 12.8px; }

/* 提示块 */
.notice {
  border: 1px solid var(--border-strong); border-left: 3px solid var(--cyan);
  background: var(--panel-2); border-radius: var(--radius-sm);
  padding: 14px 18px; margin: 18px 0; font-size: 14.5px;
}
.notice.warn { border-left-color: var(--amber); }
.notice.danger { border-left-color: var(--red); }
.notice .t { font-weight: 650; margin-bottom: 4px; }

/* ── 文档布局 ───────────────────────────────────────────── */
.docs-shell { display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); gap: 34px; }
.docs-shell > .container { display: contents; }
.docs-wrap { display: flex; max-width: 1500px; margin: 0 auto; width: 100%; }
.sidebar {
  width: var(--sidebar-w); flex: none; border-right: 1px solid var(--border);
  height: calc(100vh - var(--header-h)); position: sticky; top: var(--header-h);
  overflow-y: auto; padding: 18px 12px 60px 20px; scrollbar-width: thin;
}
.sidebar .search-box { position: relative; margin: 0 8px 16px 0; }
.sidebar .search-box input {
  width: 100%; padding: 8px 11px; border-radius: 9px; font-size: 13.5px;
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  outline: none;
}
.sidebar .search-box input:focus { border-color: var(--cyan); }
.sidebar .search-results {
  position: absolute; z-index: 40; left: 0; right: 0; max-height: 320px; overflow-y: auto;
  background: var(--panel); border: 1px solid var(--border-strong); border-radius: 10px;
  box-shadow: var(--shadow); display: none; padding: 6px;
}
.sidebar .search-results a { display: block; padding: 7px 10px; border-radius: 7px; font-size: 13.5px; }
.sidebar .search-results a:hover { background: var(--panel-2); }
.sidebar .search-results small { display: block; color: var(--text-3); font-size: 11.5px; }

.tab-switch { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 8px 14px 0; border-bottom: 1px solid var(--border); margin-bottom: 14px; }
.tab-switch a {
  font-size: 12.5px; padding: 4px 10px; border-radius: 999px; color: var(--text-3);
  border: 1px solid transparent;
}
.tab-switch a:hover { color: var(--text); border-color: var(--border); }
.tab-switch a.active { color: #04121f; background: var(--grad); font-weight: 600; }

.nav-group { margin-bottom: 6px; }
.nav-group > .g-title {
  font-size: 11.5px; text-transform: uppercase; letter-spacing: .8px; color: var(--text-3);
  padding: 12px 10px 5px; font-weight: 600;
}
.nav-group a {
  display: block; padding: 5.5px 10px; border-radius: 7px; font-size: 13.8px; color: var(--text-2);
  border-left: 2px solid transparent;
}
.nav-group a:hover { background: var(--panel-2); color: var(--text); }
.nav-group a.active { color: var(--cyan); background: var(--grad-soft); font-weight: 600; }

.main-col { flex: 1; min-width: 0; padding: 26px 30px 90px; max-width: 900px; }
.crumbs { font-size: 12.5px; color: var(--text-3); margin-bottom: 14px; }
.crumbs a:hover { color: var(--cyan); }
.main-col h1 { font-size: 31px; margin: 0 0 10px; letter-spacing: -.4px; }
.main-col .page-desc { color: var(--text-2); margin: 0 0 26px; font-size: 15.5px; }

.doc-body { font-size: 15.2px; }
.doc-body h2 { font-size: 22px; margin: 40px 0 14px; padding-bottom: 7px; border-bottom: 1px solid var(--border); }
.doc-body h3 { font-size: 17.5px; margin: 28px 0 10px; }
.doc-body h4 { font-size: 15.5px; margin: 22px 0 8px; }
.doc-body p { margin: 0 0 14px; }
.doc-body ul, .doc-body ol { padding-left: 22px; margin: 0 0 14px; }
.doc-body li { margin: 4px 0; }
.doc-body li > ul { margin: 4px 0; }
.doc-body a { color: var(--cyan); text-decoration: underline; text-underline-offset: 2px; }
.doc-body img { border-radius: 10px; border: 1px solid var(--border); margin: 8px 0; }
.doc-body hr { border: none; border-top: 1px solid var(--border); margin: 30px 0; }
.doc-body blockquote {
  margin: 16px 0; padding: 2px 0 2px 16px; border-left: 3px solid var(--border-strong);
  color: var(--text-2);
}
.doc-body code {
  background: var(--bg-3); border: 1px solid var(--border); padding: 1.5px 6px;
  border-radius: 5px; font-size: 13.2px; word-break: break-word;
}
.doc-body table, .table-wrap table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14.2px; }
.doc-body th, .doc-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; vertical-align: top; }
.doc-body th { background: var(--panel-2); font-weight: 650; }
.doc-body tr:nth-child(even) td { background: color-mix(in srgb, var(--panel) 55%, transparent); }

/* 代码块 */
.codeblock { position: relative; margin: 16px 0; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; background: #071022; }
html[data-theme="light"] .codeblock { background: #f8fafd; }
.codeblock .cb-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px; background: #0b1730; border-bottom: 1px solid var(--border);
  font-size: 12px; color: #94a3b8;
}
html[data-theme="light"] .codeblock .cb-head { background: #eef3fb; color: #64748b; }
.codeblock pre { margin: 0; padding: 14px 16px; overflow-x: auto; font-size: 13.2px; line-height: 1.75; }
.codeblock pre code { background: none; border: none; padding: 0; font-size: inherit; color: #e2e8f5; }
html[data-theme="light"] .codeblock pre code { color: #0f172a; }
.copy-btn { border: 1px solid var(--border); background: transparent; color: inherit; border-radius: 6px; font-size: 11.5px; padding: 2px 8px; cursor: pointer; }
.copy-btn:hover { color: var(--cyan); border-color: var(--cyan); }

/* 选项卡 */
.tabs { border: 1px solid var(--border); border-radius: var(--radius-sm); margin: 16px 0; overflow: hidden; }
.tabs .tabbar { display: flex; flex-wrap: wrap; gap: 2px; background: var(--panel-2); padding: 5px 6px 0; border-bottom: 1px solid var(--border); }
.tabs .tabbar button {
  border: none; background: transparent; color: var(--text-2); font-size: 13.5px;
  padding: 8px 14px; border-radius: 8px 8px 0 0; cursor: pointer; font-family: inherit;
}
.tabs .tabbar button:hover { color: var(--text); }
.tabs .tabbar button.active { background: var(--bg); color: var(--text); font-weight: 600; box-shadow: inset 0 2px 0 var(--cyan); }
.tabs .tabpane { padding: 16px 18px; display: none; }
.tabs .tabpane.active { display: block; }
.tabs .tabpane > :first-child { margin-top: 0; }
.tabs .tabpane > :last-child { margin-bottom: 0; }

/* 卡片组 */
.cardgroup { display: grid; gap: 14px; margin: 18px 0; }
.cardgroup.cols-1 { grid-template-columns: 1fr; }
.cardgroup.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cardgroup.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cardgroup.cols-4 { grid-template-columns: repeat(4, 1fr); }
.mint-card {
  display: block; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 15px 17px; transition: .16s;
}
.mint-card:hover { border-color: var(--cyan); transform: translateY(-1px); }
.mint-card .ct { font-weight: 650; font-size: 15px; margin-bottom: 5px; display: flex; align-items: center; gap: 8px; }
.mint-card .cb { color: var(--text-2); font-size: 13.8px; }
.mint-card .cb > :last-child { margin-bottom: 0; }

/* Frame（图片/视频框） */
.frame { margin: 20px 0; }
.frame .frame-inner { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.frame img, .frame video { display: block; width: 100%; }
.frame figcaption { font-size: 12.8px; color: var(--text-3); margin-top: 8px; text-align: center; }

/* 折叠 */
.acc { border: 1px solid var(--border); border-radius: var(--radius-sm); margin: 12px 0; overflow: hidden; }
.acc > summary { cursor: pointer; padding: 12px 16px; font-weight: 600; font-size: 14.5px; background: var(--panel); list-style: none; }
.acc > summary::-webkit-details-marker { display: none; }
.acc > summary::before { content: "▸"; color: var(--cyan); margin-right: 8px; display: inline-block; transition: .18s; }
.acc[open] > summary::before { transform: rotate(90deg); }
.acc .acc-body { padding: 4px 18px 14px; }
.acc .acc-body > :first-child { margin-top: 0; }

/* 页面底部导航 */
.page-nav { display: flex; gap: 12px; margin-top: 46px; padding-top: 22px; border-top: 1px solid var(--border); }
.page-nav a {
  flex: 1; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 15px; transition: .16s;
}
.page-nav a:hover { border-color: var(--cyan); }
.page-nav small { display: block; color: var(--text-3); font-size: 11.5px; }
.page-nav b { font-weight: 600; font-size: 14.5px; }
.page-nav .next { text-align: right; }

/* 右侧目录 */
.outline { position: sticky; top: calc(var(--header-h) + 26px); width: 210px; flex: none; font-size: 13px; padding-top: 26px; max-height: calc(100vh - 120px); overflow-y: auto; }
.outline .o-title { font-size: 11.5px; letter-spacing: .8px; text-transform: uppercase; color: var(--text-3); margin-bottom: 9px; }
.outline a { display: block; padding: 3.5px 0 3.5px 11px; border-left: 2px solid var(--border); color: var(--text-2); }
.outline a:hover { color: var(--cyan); }
.outline a.lv3 { padding-left: 24px; font-size: 12.5px; color: var(--text-3); }
.outline a.active { color: var(--cyan); border-left-color: var(--cyan); }

/* ── 页脚 ───────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 46px 0 30px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 30px; }
.footer-grid h4 { font-size: 13px; margin: 0 0 12px; color: var(--text); }
.footer-grid a { display: block; font-size: 13.8px; color: var(--text-2); padding: 3px 0; }
.footer-bottom {
  margin-top: 34px; padding-top: 20px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between;
  color: var(--text-3); font-size: 13px;
}

/* ── 下载页 ─────────────────────────────────────────────── */
.dl-hero { padding: 54px 0 34px; }
.dl-card {
  background: var(--panel); border: 1px solid var(--border-strong); border-radius: var(--radius);
  padding: 26px; display: grid; grid-template-columns: 1fr auto; gap: 22px; align-items: center;
}
.dl-card h2 { margin: 0 0 6px; font-size: 21px; }
.dl-meta { color: var(--text-3); font-size: 13.5px; font-family: var(--mono); word-break: break-all; }
.timeline { border-left: 2px solid var(--border); padding-left: 20px; margin-top: 20px; }
.timeline .ver { font-weight: 700; }
.timeline .when { color: var(--text-3); font-size: 12.5px; margin-left: 8px; }

/* 更新记录列表 */
.tl-list { display: grid; gap: 10px; margin-top: 14px; }
.tl-item {
  display: grid; grid-template-columns: minmax(120px, 1fr) minmax(0, 3fr) auto;
  gap: 14px; align-items: center; background: var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 16px;
}
.tl-item .when { color: var(--text-3); font-size: 12.5px; margin-left: 8px; }
.tl-item .tl-note { color: var(--text-2); font-size: 13.5px; }
.tl-item .tl-act a { color: var(--cyan); font-size: 13.5px; }
@media (max-width: 860px) {
  .tl-item { grid-template-columns: 1fr; gap: 4px; }
}
.sync-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px;
  color: var(--text-3); margin-top: 10px;
}
.sync-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

/* 移动端 */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .outline { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  #menu-toggle { display: inline-flex; }
  .nav {
    display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px; padding: 10px 14px 16px;
    background: var(--bg-2); border-bottom: 1px solid var(--border);
  }
  .nav.open { display: flex; }
  .grid-3, .grid-2, .cardgroup.cols-2, .cardgroup.cols-3 { grid-template-columns: 1fr; }
  .docs-wrap { flex-direction: column; }
  .sidebar {
    position: static; width: 100%; height: auto; border-right: none;
    border-bottom: 1px solid var(--border); padding: 14px 18px;
  }
  .sidebar .nav-group { display: none; }
  .sidebar.open .nav-group { display: block; }
  .main-col { padding: 20px 18px 70px; }
  .dl-card { grid-template-columns: 1fr; }
}