/*
 CodexGuide —— 对齐 OpenAI Codex 官网（openai.com/codex）的视觉语言
 浅色 / 大留白 / 极简 / OpenAI 品牌绿 / 终端窗口 / 黑色胶囊按钮
 默认浅色，可切换深色（深色为可选增强，非官网默认）。
*/

/* ============ 设计变量（浅色 = 官网默认） ============ */
:root {
  --bg: #FFFFFF;
  --surface: #F7F7F8;          /* OpenAI 标志性的浅灰底 */
  --surface-2: #FFFFFF;
  --text: #0D0D0D;
  --text-dim: #5D5D5D;
  --text-faint: #8E8EA0;
  --border: #E5E5E5;
  --border-strong: #D4D4D4;
  --brand: #10A37F;            /* OpenAI 品牌绿 */
  --brand-ink: #0C7A5E;        /* 深绿，用于浅底文字 */
  --brand-soft: rgba(16,163,127,0.10);
  --black: #0D0D0D;
  --code-bg: #0D0D0D;
  --code-text: #E6E6E6;
  --code-comment: #7A7A7A;
  --code-key: #6EE7B7;
  --code-str: #A8E6CF;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.06);
  --shadow: 0 6px 28px -10px rgba(0,0,0,.14);
  --font-sans: "Inter", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 1160px;
  --readw: 700px;
  --nav-h: 64px;
}

html[data-theme="dark"] {
  --bg: #0D0D0D;
  --surface: #161616;
  --surface-2: #1D1D1F;
  --text: #F2F2F2;
  --text-dim: #B4B4B4;
  --text-faint: #7C7C7C;
  --border: rgba(255,255,255,.10);
  --border-strong: rgba(255,255,255,.18);
  --brand: #19C37D;
  --brand-ink: #6EE7B7;
  --brand-soft: rgba(25,195,125,.12);
  --black: #FFFFFF;
  --code-bg: #000000;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow: 0 8px 30px -10px rgba(0,0,0,.6);
}

/* ============ 基础 ============ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
h1, h2, h3, h4 { line-height: 1.18; font-weight: 700; letter-spacing: -0.02em; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.reading { max-width: var(--readw); margin: 0 auto; }
::selection { background: var(--brand-soft); color: var(--brand-ink); }

/* ============ 顶栏（干净白底，细线分隔） ============ */
.site-header {
  position: sticky; top: 0; z-index: 100; height: var(--nav-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; gap: 20px; width: 100%; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 18px; letter-spacing: -0.02em; color: var(--text); }
.brand .logo { width: 26px; height: 26px; color: var(--text); display: inline-flex; }
.brand .logo svg { width: 100%; height: 100%; }
.nav { display: flex; gap: 2px; margin-left: 8px; flex: 1; list-style: none; padding: 0; }
.nav li, .site-footer li { list-style: none; margin: 0; padding: 0; }
.nav a {
  padding: 8px 14px; border-radius: var(--radius-pill); color: var(--text-dim);
  font-weight: 500; font-size: 15px; transition: color .15s ease, background .15s ease;
}
.nav a:hover, .nav a.current { color: var(--text); background: var(--surface); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: var(--radius-sm); border: 1px solid transparent;
  background: transparent; color: var(--text-dim); cursor: pointer; display: grid; place-items: center; transition: .15s ease;
}
.icon-btn:hover { color: var(--text); background: var(--surface); }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 18px; border-radius: var(--radius-pill);
  font-weight: 600; font-size: 15px; cursor: pointer; border: 1px solid transparent; transition: .15s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--black); color: var(--bg); }
.btn-primary:hover { transform: translateY(-1px); opacity: .92; }
.btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { background: var(--surface); }
.menu-toggle { display: none; }

/* ============ 搜索浮层 ============ */
.search-overlay { padding: 14px 0; border-top: 1px solid var(--border); background: var(--bg); }
.searchbar { display: flex; gap: 10px; max-width: 560px; margin: 0 auto; }
.searchbar input {
  flex: 1; padding: 13px 18px; border-radius: var(--radius-pill); border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text); font-size: 15px; font-family: inherit;
}
.searchbar input:focus { outline: none; border-color: var(--brand); }

/* ============ 英雄区（居中标题 + 终端窗口） ============ */
.hero { position: relative; padding: 84px 0 40px; text-align: center; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; top: -160px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 460px;
  background: radial-gradient(ellipse at center, rgba(16,163,127,.12), transparent 60%);
  pointer-events: none;
}
.hero .eyebrow {
  position: relative; display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  border-radius: var(--radius-pill); background: var(--brand-soft); color: var(--brand-ink);
  font-size: 13px; font-weight: 600; margin-bottom: 22px;
}
.hero h1 { position: relative; font-size: clamp(34px, 5.4vw, 58px); margin: 0 0 18px; letter-spacing: -0.035em; }
.hero h1 .grad-text { color: var(--brand); }
.hero p.lead { position: relative; font-size: clamp(16px, 2.2vw, 20px); color: var(--text-dim); max-width: 660px; margin: 0 auto 30px; line-height: 1.55; }
.hero .cta { position: relative; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .stats { position: relative; display: flex; gap: 40px; justify-content: center; margin-top: 52px; flex-wrap: wrap; }
.hero .stats .stat { text-align: center; }
.hero .stats .num { font-size: 30px; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.hero .stats .lbl { font-size: 13px; color: var(--text-faint); }

/* 终端窗口（OpenAI Codex 标志性视觉） */
.terminal {
  position: relative; max-width: 820px; margin: 48px auto 0; text-align: left;
  background: var(--code-bg); border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.06);
}
.terminal-bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px;
  background: #161616; border-bottom: 1px solid rgba(255,255,255,.07);
}
.terminal-bar .dot { width: 12px; height: 12px; border-radius: 50%; }
.terminal-bar .dot.r { background: #FF5F57; }
.terminal-bar .dot.y { background: #FEBC2E; }
.terminal-bar .dot.g { background: #28C840; }
.terminal-bar .title { margin-left: 8px; color: #8A8A8A; font-size: 12.5px; font-family: var(--font-mono); }
.terminal-body { padding: 20px 22px; font-family: var(--font-mono); font-size: 14px; line-height: 1.7; color: var(--code-text); }
.terminal-body .t-prompt { color: var(--brand); margin-right: 8px; user-select: none; }
.terminal-body .t-line { margin: 0; }
.terminal-body .t-out { margin: 2px 0 14px; color: var(--code-comment); }
.terminal-body .t-out .ok { color: var(--code-key); }
.terminal-body .t-cursor { color: var(--brand); animation: blink 1.1s steps(2, start) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ============ 区块 ============ */
.section { padding: 64px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 30px; gap: 16px; }
.section-head h2 { font-size: clamp(24px, 3.4vw, 34px); margin: 0; letter-spacing: -0.025em; }
.section-head p { color: var(--text-dim); margin: 8px 0 0; font-size: 15.5px; }
.section-head .more { color: var(--brand-ink); font-weight: 600; font-size: 14.5px; white-space: nowrap; }
.section-head .more:hover { text-decoration: underline; }

/* ============ 卡片网格 ============ */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-1 { grid-template-columns: 1fr; }

.card {
  position: relative; display: flex; flex-direction: column; gap: 12px; padding: 26px;
  border-radius: var(--radius); background: var(--surface-2); border: 1px solid var(--border);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.card .kicker { font-size: 12.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--brand); }
.card h3 { font-size: 19px; margin: 0; }
.card p { color: var(--text-dim); font-size: 14.5px; margin: 0; flex: 1; }
.card .meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-faint); }

.post-card {
  display: flex; flex-direction: column; gap: 11px; padding: 24px; border-radius: var(--radius);
  background: var(--surface-2); border: 1px solid var(--border); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.post-card h3 { font-size: 18.5px; margin: 0; letter-spacing: -0.01em; }
.post-card p { color: var(--text-dim); font-size: 14.5px; margin: 0; }
.post-card .meta { font-size: 13px; color: var(--text-faint); display: flex; gap: 12px; align-items: center; }
.post-card .arrow { margin-left: auto; color: var(--text-faint); transition: transform .2s ease, color .2s ease; }
.post-card:hover .arrow { color: var(--brand); transform: translateX(4px); }

/* ============ 标签 / 胶囊 ============ */
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: var(--radius-pill); font-size: 12.5px; font-weight: 600; background: var(--surface); color: var(--text-dim); border: 1px solid var(--border); }
.pill.cat-start { color: var(--brand-ink); background: var(--brand-soft); border-color: transparent; }
.pill.cat-advanced { color: #6B5BD6; background: rgba(107,91,214,.10); border-color: transparent; }
.pill.cat-recipes { color: #C2740B; background: rgba(194,116,11,.10); border-color: transparent; }

/* ============ 文章页 ============ */
.article-header { padding: 56px 0 20px; }
.article-header .pill { margin-bottom: 16px; }
.article-header h1 { font-size: clamp(28px, 4.4vw, 42px); margin: 0 0 14px; letter-spacing: -0.03em; }
.article-header .meta { color: var(--text-faint); font-size: 14px; display: flex; gap: 16px; flex-wrap: wrap; }
.entry { font-size: 17px; line-height: 1.82; }
.entry h2 { font-size: 25px; margin: 44px 0 14px; padding-top: 10px; letter-spacing: -0.02em; }
.entry h3 { font-size: 21px; margin: 30px 0 12px; }
.entry p { margin: 16px 0; }
.entry ul, .entry ol { margin: 16px 0; padding-left: 24px; }
.entry li { margin: 8px 0; }
.entry a { color: var(--brand-ink); border-bottom: 1px solid var(--brand-soft); }
.entry a:hover { border-bottom-color: var(--brand); }
.entry strong { color: var(--text); font-weight: 700; }
.entry blockquote { margin: 20px 0; padding: 14px 20px; border-left: 3px solid var(--brand); background: var(--brand-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-dim); }
.entry img { border-radius: var(--radius-sm); border: 1px solid var(--border); margin: 20px 0; }
.entry hr { border: none; border-top: 1px solid var(--border); margin: 36px 0; }
.entry table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; }
.entry th, .entry td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.entry th { background: var(--surface); font-weight: 600; }
/* 表格横向滚动容器：窄屏下不再撑破布局（内容过宽时可左右滑动） */
.entry .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 20px 0; }
.entry .table-wrap > table { margin: 0; width: auto; min-width: 100%; }

/* 代码块（深色终端风） */
.entry pre, pre.code {
  background: var(--code-bg); border: 1px solid rgba(255,255,255,.07); border-radius: var(--radius-sm);
  padding: 18px 20px; overflow: auto; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.6;
  position: relative; margin: 22px 0; color: var(--code-text);
}
.entry code { font-family: var(--font-mono); font-size: .88em; background: var(--surface); padding: 2px 6px; border-radius: 6px; color: var(--brand-ink); }
.entry pre code { background: none; padding: 0; color: var(--code-text); font-size: 13.5px; }
.copy-btn {
  position: absolute; top: 10px; right: 10px; font-size: 11px; padding: 4px 10px; border-radius: 7px;
  border: 1px solid rgba(255,255,255,.14); background: #161616; color: #B4B4B4; cursor: pointer; opacity: 0; transition: .2s;
}
pre.code:hover .copy-btn, .entry pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: #fff; border-color: rgba(255,255,255,.3); }

/* 文章单栏居中 + 顶部目录（对齐 codexguide.ai 的居中阅读排版） */
.article-wrap { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.toc { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 18px 22px; margin: 4px 0 40px; font-size: 14px; }
.toc h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); margin: 0 0 12px; font-weight: 600; }
.toc a { display: block; color: var(--text-dim); padding: 5px 0; border-left: 2px solid transparent; padding-left: 12px; transition: .15s; }
.toc a:hover, .toc a.active { color: var(--brand-ink); border-left-color: var(--brand); }

/* 相关阅读（正文下方整宽区块，不再挤压正文） */
.related { margin-top: 64px; padding-top: 36px; border-top: 1px solid var(--border); }
.related h3 { font-size: 21px; margin: 0 0 22px; letter-spacing: -0.02em; }
.related-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.rel-card { display: flex; flex-direction: column; gap: 10px; padding: 18px 20px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); text-decoration: none; color: var(--text); transition: .18s; }
.rel-card:hover { border-color: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.rel-title { font-size: 15px; font-weight: 600; line-height: 1.45; }
@media (max-width: 720px) { .related-list { grid-template-columns: 1fr; } }
.progress { position: fixed; top: var(--nav-h); left: 0; height: 2px; background: var(--brand); width: 0; z-index: 99; transition: width .1s; }

/* ============ 页面标题 / 404 ============ */
.page-title { font-size: clamp(26px, 4vw, 38px); margin: 0 0 8px; letter-spacing: -0.03em; }
.page-sub { color: var(--text-dim); margin: 0 0 32px; }
.pagination { display: flex; gap: 8px; justify-content: center; margin: 40px 0; }
.pagination a, .pagination span { padding: 9px 15px; border-radius: 10px; background: var(--surface); border: 1px solid var(--border); color: var(--text-dim); }
.pagination a:hover { color: var(--text); border-color: var(--border-strong); }
.pagination .current { background: var(--black); color: var(--bg); border: none; }

/* ============ 页脚 ============ */
.site-footer { border-top: 1px solid var(--border); margin-top: 80px; padding: 52px 0 32px; background: var(--surface); }
.site-footer .cols { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px; }
.site-footer h5 { font-size: 12.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); margin: 0 0 16px; font-weight: 600; }
.site-footer a { display: block; color: var(--text-dim); font-size: 14.5px; padding: 6px 0; transition: color .15s; }
.site-footer a:hover { color: var(--brand-ink); }
.site-footer .brand { font-size: 22px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--text-faint); font-size: 13px; flex-wrap: wrap; gap: 12px; }
.footer-bottom a { display: inline; }

/* ============ 动效 ============ */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
  .terminal { margin-left: 16px; margin-right: 16px; }
}
@media (max-width: 720px) {
  .nav { position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--border); padding: 16px 24px; gap: 4px; transform: translateY(-120%); transition: transform .25s ease; }
  .nav.open { transform: none; }
  .menu-toggle { display: grid; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .site-footer .cols { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 28px; }
  .section { padding: 48px 0; }
}

/* ============ 视频栏目 · 博主精选 ============ */
.pill.cat-videos { color: #FE2C55; background: rgba(254,44,85,.10); border-color: transparent; }

.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.creators { align-items: start; }
.creator-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius, 16px);
  padding: 22px; display: flex; flex-direction: column; gap: 14px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.creator-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.cc-head { display: flex; align-items: center; gap: 14px; }
.avatar {
  width: 52px; height: 52px; border-radius: 50%; flex: 0 0 52px;
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 22px;
  background: linear-gradient(135deg, #10A37F, #06b6d4);
}
.avatar.sm { width: 38px; height: 38px; flex-basis: 38px; font-size: 16px; }
.cc-id h3 { margin: 0; font-size: 18px; letter-spacing: -0.01em; }
.badges { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 6px; }
.badge { display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; color: #fff; }
.badge.dy { background: #FE2C55; }
.badge.bz { background: #00AEEC; }
.fans { font-size: 12px; color: var(--text-faint); }
.cc-desc { margin: 0; color: var(--text-dim); font-size: 14.5px; line-height: 1.6; }
.video-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.video-list li { display: flex; gap: 8px; font-size: 14px; color: var(--text); }
.video-list .play { color: #FE2C55; font-size: 12px; line-height: 1.7; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 12px; color: var(--text-faint); background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; }
.cc-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.ext-btn { font-size: 13.5px; font-weight: 600; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); transition: background .15s, color .15s, border-color .15s; }
.ext-btn.dy { color: #FE2C55; border-color: rgba(254,44,85,.35); }
.ext-btn.dy:hover { background: #FE2C55; color: #fff; border-color: #FE2C55; }
.ext-btn.bz { color: #00AEEC; border-color: rgba(0,174,236,.35); }
.ext-btn.bz:hover { background: #00AEEC; color: #fff; border-color: #00AEEC; }

.creator-mini-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.creator-mini {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius, 16px);
  transition: transform .2s ease, border-color .2s ease;
}
.creator-mini:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.cm-name { font-weight: 600; font-size: 15px; }
.creator-mini .badges { margin-top: 4px; }

@media (max-width: 720px) {
  .creator-mini-row { grid-template-columns: 1fr 1fr; }
}

/* ============ 关于页 · 品牌页 ============ */
.about-wrap { max-width: 920px; }
.about-block { margin-top: 36px; }
.about-block h3 { font-size: 21px; letter-spacing: -0.01em; margin: 0 0 12px; }
.about-block p { color: var(--text-dim); line-height: 1.75; margin: 0; font-size: 15.5px; }
.about-block strong { color: var(--text-strong); }
.about-feats { margin-top: 6px; }
.feat-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius, 16px);
  padding: 20px; display: flex; flex-direction: column; gap: 10px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.feat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.feat-card h4 { margin: 0; font-size: 17px; letter-spacing: -0.01em; }
.feat-card p { font-size: 14px; }
.feat-card a { margin-top: auto; font-size: 13.5px; font-weight: 600; color: var(--brand-ink); text-decoration: none; }
.feat-card a:hover { text-decoration: underline; }
.about-list { margin: 0; padding-left: 20px; color: var(--text-dim); line-height: 1.9; font-size: 15px; }
.about-list li { margin-bottom: 6px; }
.about-list a { color: var(--brand-ink); }
.about-cta {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius, 16px);
  padding: 26px; margin-top: 40px;
}
.about-cta h3 { color: var(--text-strong); }
.about-cta-btns { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 12px; }
.about-cta-btns .btn { text-decoration: none; }

/* 首页栏目总览 */
.col-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.col-card { display: block; text-decoration: none; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px 18px 16px; transition: transform .2s, border-color .2s, box-shadow .2s; }
.col-card:hover { transform: translateY(-3px); border-color: var(--brand-ink); box-shadow: 0 8px 24px rgba(0,0,0,.06); }
.col-card .pill { margin-bottom: 10px; }
.col-card p { color: var(--text-faint); font-size: 13px; margin: 0; line-height: 1.5; }
@media (max-width: 720px) { .col-grid { grid-template-columns: repeat(2, 1fr); } }

/* ============ 技能栏目 ============ */
.pill.cat-skills { color: #0E9F9A; background: rgba(14,159,154,.10); border-color: transparent; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin: 6px 0 26px; }
.chip {
  font-size: 13.5px; font-weight: 600; padding: 7px 16px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text-dim);
  cursor: pointer; transition: all .15s ease;
}
.chip:hover { border-color: var(--border-strong); color: var(--text-strong); }
.chip.active { background: var(--brand-ink); color: #fff; border-color: var(--brand-ink); }
.skills { align-items: start; }
.skill-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius, 16px);
  padding: 22px; display: flex; flex-direction: column; gap: 12px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.skill-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.sk-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.sk-title { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.sk-title h3 { margin: 0; font-size: 18px; letter-spacing: -0.01em; }
.sk-name { font-family: var(--font-mono, monospace); font-size: 12.5px; color: var(--text-faint); background: var(--surface); padding: 3px 8px; border-radius: 8px; white-space: nowrap; }
.badge-domestic { display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; color: #0E9F9A; background: rgba(14,159,154,.12); }
.badge-domestic.sm { font-size: 10.5px; padding: 1px 7px; }
.sk-desc { margin: 0; color: var(--text-dim); font-size: 14.5px; line-height: 1.7; }
.sk-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.scn { font-size: 12px; font-weight: 600; color: var(--text-faint); background: var(--surface); border: 1px solid var(--border); padding: 2px 10px; border-radius: 999px; }
.sk-domestic { margin: 0; font-size: 13px; color: #0E9F9A; line-height: 1.6; }
.sk-body { display: flex; flex-direction: column; gap: 10px; border-top: 1px solid var(--border); padding-top: 14px; }
.sk-row { display: grid; grid-template-columns: 44px 1fr; gap: 10px; align-items: start; }
.sk-k { font-size: 13px; font-weight: 700; color: var(--text-strong); padding-top: 2px; }
.sk-cmd { font-family: var(--font-mono, monospace); font-size: 12.5px; color: var(--text-dim); background: var(--surface); padding: 6px 10px; border-radius: 8px; white-space: pre-wrap; word-break: break-all; }
.sk-row p { margin: 0; font-size: 13.5px; color: var(--text-dim); line-height: 1.6; }
.sk-links { margin-top: 4px; }
.ext-btn { color: var(--brand-ink); }
.ext-btn:hover { background: var(--brand-soft); border-color: var(--brand); }
.skill-mini-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.skill-mini {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius, 16px);
  text-decoration: none; color: var(--text-strong); font-weight: 600; font-size: 14.5px;
  transition: transform .2s ease, border-color .2s ease;
}
.skill-mini:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.sm-name { color: var(--text-strong); }
@media (max-width: 720px) {
  .skill-mini-row { grid-template-columns: 1fr 1fr; }
}