/* ============================================================
   Interlocking · CG 板块样式（直角 / 矩形 工业风格）
   品牌色：#AE1F19 红 / #0A0A0A 黑 / #F5F5F5 白 / #7D7D7D 灰
   原则：没有圆角，没有药丸，没有模糊光斑 —— 只有边、块、线
   ============================================================ */

:root {
  --red: #AE1F19;
  --red-dark: #8A1712;
  --red-soft: #F6E9E8;
  --ink: #141414;
  --ink-2: #3A3A3A;
  --gray: #7D7D7D;
  --line: #E0E0DE;
  --line-dark: #2A2A2A;
  --bg: #FAFAF9;
  --card: #FFFFFF;
  --code-bg: #161616;
  --maxw: 1180px;
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-title: "Rockwell", "Rockwell Nova", "Songti SC", Georgia, serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  font-family: var(--font-cn);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------------- 顶栏 ---------------- */
.cg-topbar {
  position: fixed; top: 0; left: 0; right: 0; height: 64px;
  background: #FFFFFF;
  border-bottom: 2px solid var(--ink);
  z-index: 100;
  display: flex; align-items: center;
}
.cg-topbar .inner {
  width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 16px;
}
.cg-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .3px; color: var(--ink); }
.cg-brand:hover { text-decoration: none; }
.cg-brand img { height: 38px; width: auto; display: block; }
.cg-brand small { font-weight: 500; color: var(--gray); letter-spacing: 0; font-size: 13px; }
.cg-nav { margin-left: auto; display: flex; gap: 0; align-items: center; border: 1px solid var(--line); }
.cg-nav a {
  color: var(--ink-2); font-size: 14px; padding: 8px 16px;
  border-right: 1px solid var(--line); transition: .12s;
}
.cg-nav a:last-child { border-right: 0; }
.cg-nav a:hover { background: var(--red-soft); color: var(--red); text-decoration: none; }
.cg-nav a.active { background: var(--red); color: #fff; }

/* ---------------- 布局 ---------------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.page { padding-top: 64px; }

/* Hero：硬边色块 + 网格，没有圆形光斑 */
.hero {
  background: #14100F;
  color: #fff; padding: 88px 0 76px; position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.045) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.045) 0 1px, transparent 1px 56px);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; top: 0; bottom: 0; right: -60px; width: 34%;
  background: linear-gradient(160deg, #AE1F19 0%, #8A1712 62%, #5C0F0C 100%);
  transform: skewX(-14deg);
  border-left: 3px solid #E8B8B4;
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; }
.hero .kicker {
  display: inline-block;
  font-size: 11px; letter-spacing: .2em; text-transform: uppercase;
  color: #F3B9B5; border: 1px solid rgba(255,255,255,.28);
  padding: 6px 12px;
}
.hero h1 {
  font-family: var(--font-title); font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.16; margin: 22px 0 18px; letter-spacing: -.5px;
}
.hero p.lead { color: rgba(255,255,255,.76); font-size: 17px; max-width: 660px; }
.hero .meta {
  margin-top: 30px; display: flex; flex-wrap: wrap; gap: 0;
  font-size: 13px; color: rgba(255,255,255,.58);
  border-top: 1px solid rgba(255,255,255,.16); padding-top: 16px;
}
.hero .meta span { margin-right: 26px; }
.hero .meta b { color: #fff; font-weight: 600; }

/* 正文排版 */
.layout { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 52px; padding: 56px 0 100px; }
.toc {
  position: sticky; top: 92px; align-self: start; max-height: calc(100vh - 120px);
  overflow: auto; font-size: 14px; border-left: 3px solid var(--ink); padding-left: 18px;
}
.toc h4 { font-size: 11px; letter-spacing: .18em; color: var(--gray); text-transform: uppercase; margin-bottom: 12px; }
.toc a { display: block; color: var(--ink-2); padding: 4px 0; }
.toc a:hover { color: var(--red); text-decoration: none; }
.toc a.sub { padding-left: 12px; font-size: 13px; color: var(--gray); }

article h2 {
  font-family: var(--font-title); font-size: 30px; margin: 64px 0 8px;
  padding-top: 10px; letter-spacing: -.3px;
  border-top: 2px solid var(--ink);
}
article h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
article h2 .num {
  color: var(--red); font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  display: block; letter-spacing: .16em; margin-bottom: 8px;
}
article h3 {
  font-size: 20px; margin: 36px 0 10px; padding-left: 12px;
  border-left: 4px solid var(--red); line-height: 1.4;
}
article h4 { font-size: 15px; margin: 24px 0 8px; color: var(--ink-2); }
article p { margin: 12px 0; color: var(--ink-2); }
article ul, article ol { margin: 12px 0 12px 22px; color: var(--ink-2); }
article li { margin: 6px 0; }
article li::marker { color: var(--red); }
article strong { color: var(--ink); }
article hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }

/* 图 */
figure { margin: 26px 0; }
figure img {
  width: 100%; display: block; border: 1px solid var(--line); background: #fff;
}
figure.shot img { border-color: var(--line-dark); }
figcaption {
  font-size: 12.5px; color: var(--gray); margin-top: 8px;
  padding-left: 10px; border-left: 2px solid var(--line);
}
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* 代码 */
pre {
  background: var(--code-bg); color: #E8E6E3;
  padding: 16px 18px; overflow: auto; font-family: var(--font-mono);
  font-size: 13.5px; line-height: 1.65; margin: 16px 0;
  border-left: 3px solid var(--red);
}
pre .c { color: #7C8B7A; }
pre .k { color: #E4896A; }
code.inline {
  background: #F1F0EE; padding: 1px 6px;
  font-family: var(--font-mono); font-size: .9em; color: #7A1410;
  border-bottom: 1px solid #DCCDCC;
}

/* 表格 */
.tablewrap { overflow: auto; margin: 18px 0; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: #fff; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th {
  background: var(--ink); color: #fff; font-weight: 600; white-space: nowrap;
  letter-spacing: .02em;
}
tr:last-child td { border-bottom: 0; }
tbody tr:nth-child(even) td { background: #FBFAF9; }
td code { font-family: var(--font-mono); font-size: 12.8px; color: #7A1410; background: #F6F1F0; padding: 1px 5px; }
td.ok { color: #1F7A3D; font-weight: 600; }
td.no { color: #B3261E; font-weight: 600; }

/* 提示块：硬边 */
.callout {
  border: 1px solid var(--line); border-left: 4px solid var(--red);
  background: #fff; padding: 14px 18px; margin: 20px 0;
}
.callout .tag {
  font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--red); font-weight: 700; display: block; margin-bottom: 6px;
}
.callout p { margin: 4px 0; }
.callout.tip { border-left-color: #1F7A3D; }
.callout.tip .tag { color: #1F7A3D; }
.callout.warn { border-left-color: #C77700; background: #FFFDF8; }
.callout.warn .tag { color: #C77700; }

/* 卡片列表（CG 首页） */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; margin: 40px 0; }
.card {
  background: var(--card); border: 1px solid var(--line); border-top: 3px solid var(--ink);
  overflow: hidden; transition: .12s; display: flex; flex-direction: column;
}
.card:hover { border-top-color: var(--red); transform: translate(-2px, -2px); box-shadow: 4px 4px 0 rgba(20,20,20,.10); }
.card .thumb { aspect-ratio: 16/9; background: #14100F; overflow: hidden; border-bottom: 1px solid var(--line); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.card .tagline { font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--red); font-weight: 700; }
.card h3 { font-size: 19px; margin: 8px 0 8px; border: 0; padding: 0; }
.card p { font-size: 14px; color: var(--gray); flex: 1; }
.card .go { margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--red); }
.card.soon { opacity: .55; border-top-color: var(--gray); }
.card.soon .thumb { display: flex; align-items: center; justify-content: center; color: #6b6b6b; font-size: 12px; letter-spacing: .16em; }

/* 页脚 */
.foot { border-top: 1px solid var(--line); padding: 34px 0 60px; color: var(--gray); font-size: 13px; }
.foot .inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }

/* 响应式 */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; gap: 28px; }
  .toc { position: static; max-height: none; border-left: 0; padding-left: 0; border-top: 3px solid var(--ink); padding-top: 18px; }
  .duo { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 52px; }
  .hero::after { width: 60%; opacity: .28; }
  .cg-nav a { padding: 8px 10px; font-size: 13px; }
  .cg-brand img { height: 30px; }
}

/* ---- 移动端：顶栏改为两行，避免横向溢出 ---- */
@media (max-width: 760px) {
  .cg-topbar { position: static; height: auto; }
  .cg-topbar .inner { flex-wrap: wrap; gap: 8px; padding: 10px 16px; }
  .cg-nav {
    margin-left: 0; width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch;
  }
  .cg-nav a { flex: 1 0 auto; text-align: center; padding: 8px 6px; font-size: 12px; }
  .page { padding-top: 0; }
  .hero { padding: 40px 0 36px; }
  .hero::after { display: none; }
  .hero h1 { font-size: 26px; }
  .hero p.lead { font-size: 15px; }
  .hero .meta { font-size: 12px; }
  .hero .meta span { margin-right: 14px; }
  article h2 { font-size: 24px; }
  article h3 { font-size: 17px; }
  figure img { border-width: 1px; }
  .cards { grid-template-columns: 1fr; }
}

/* ---- 移动端硬约束：任何元素都不得超过视口 ---- */
@media (max-width: 760px) {
  html, body { width: 100%; max-width: 100%; overflow-x: hidden; }
  .cg-topbar, .cg-topbar .inner, .wrap, .hero .wrap, .foot .inner {
    width: 100%; max-width: 100%;
  }
  .cg-topbar .inner > *, .wrap > * { min-width: 0; }
  .cg-brand { flex: 1 1 auto; min-width: 0; }
  .cg-topbar .inner, .wrap, .hero .wrap, .foot .inner {
    padding-left: 16px; padding-right: 16px;
  }
  .cg-nav { width: 100%; min-width: 0; }
  .cards, .card, .card .thumb, figure, pre, .tablewrap { max-width: 100%; }
  .hero p.lead, .hero h1 { max-width: 100%; word-break: break-word; }
  .hero::after { display: none !important; }
}

/* ---- 节点流程图：文字永远清晰，替代小截图里的节点名 ---- */
.flow {
  display: flex; flex-wrap: wrap; align-items: stretch; gap: 4px;
  margin: 22px 0 10px;
}
.flow .step {
  flex: 1 1 96px; min-width: 88px;
  border: 1px solid var(--line); border-top: 3px solid var(--red);
  background: #fff; padding: 9px 10px;
}
.flow .step b {
  display: block; font-family: var(--font-mono); font-size: 12.5px;
  color: var(--ink); letter-spacing: 0;
}
.flow .step span { display: block; font-size: 10.5px; color: var(--gray); margin-top: 4px; line-height: 1.4; }
.flow .arrow { align-self: center; color: var(--red); font-weight: 700; font-size: 13px; padding: 0; }
.flow-note { font-size: 12.5px; color: var(--gray); margin-bottom: 6px; }

/* ---- 仿 Houdini 网络编辑器的节点示意图（纯 SVG） ---- */
.hopgraph {
  margin: 24px 0; padding: 12px; background: #1b1d1e;
  border: 1px solid #33383a;
}
.hopgraph svg { display: block; width: 100%; height: auto; }
.hopgraph figcaption {
  border-left: 2px solid #3c4144; color: #8d9295;
  padding-left: 10px; margin-top: 10px; font-size: 12.5px;
}
.hop-node .body { fill: #2f3234; stroke: #4a4f52; stroke-width: 1; }
.hop-node .tab { fill: #3a3f41; }
.hop-node .nm { fill: #e8e8e8; font-family: var(--font-mono); font-size: 13px; }
.hop-node .tp { fill: #85898c; font-family: var(--font-mono); font-size: 9.5px; }
.hop-node .dot { fill: #7fb782; }
.hop-node.sel .body { stroke: #c9b25c; stroke-width: 1.8; }
.hop-wire { stroke: #7fae84; stroke-width: 1.5; fill: none; opacity: .8; }