:root{
  --ink:#13242B;
  --bronze:#C2772B;
  --teal:#3E7C8C;
  --warm-bg:#F5F3EF;
  --surface:#FFFFFF;
  --line:#D8CFC4;
  --line-strong:#C2772B;
  --text:#1C262B;
  --muted:#5A6A6E;
  --h2-inset:16px;
  --header-h:60px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--warm-bg);
  line-height:1.75;
  font-size:16px;
}
a{color:var(--teal);text-decoration:none;}
a:hover{color:var(--bronze);}
img{max-width:100%;}
.crt-container{max-width:1180px;margin:0 auto;padding:0 var(--h2-inset);}

/* ===== 顶部固定导航 ===== */
.crt-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:var(--ink);color:#fff;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.18);}
.crt-header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;}
.crt-logo{color:#fff;font-weight:700;font-size:18px;letter-spacing:.5px;white-space:nowrap;}
.crt-nav-toggle{display:none;background:none;border:0;color:#fff;font-size:22px;cursor:pointer;padding:6px 10px;}
.crt-nav{display:flex;align-items:center;gap:18px;}
.crt-nav>a,.crt-nav-sub-btn{color:#EDE7DF;font-size:15px;background:none;border:0;cursor:pointer;padding:6px 2px;}
.crt-nav>a:hover,.crt-nav-sub-btn:hover{color:var(--bronze);}
.crt-nav-item{position:relative;}
.crt-nav-sub{display:none;position:absolute;top:100%;left:0;min-width:150px;background:var(--ink);border:1px solid rgba(255,255,255,.12);border-radius:6px;padding:6px 0;flex-direction:column;}
.crt-nav-item:hover .crt-nav-sub,.crt-nav-sub-btn[aria-expanded="true"]+.crt-nav-sub{display:flex;}
.crt-nav-sub a{padding:7px 16px;color:#EDE7DF;white-space:nowrap;}
.crt-nav-sub a:hover{background:rgba(194,119,43,.18);color:var(--bronze);}

/* ===== 面包屑 ===== */
.crt-crumb{background:var(--surface);border-bottom:1px solid var(--line);padding:10px 0;margin-top:var(--header-h);}
.crt-crumb-list{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;font-size:13px;color:var(--muted);}
.crt-crumb-list li{display:inline-flex;align-items:center;}
.crt-crumb-list li:not(:last-child)::after{content:"›";margin:0 6px;color:var(--line-strong);}
.crt-crumb-list a{color:var(--muted);}
.crt-crumb-current{color:var(--ink);font-weight:600;}

/* ===== 详情页布局 ===== */
.crt-detail-wrap{padding-top:22px;padding-bottom:48px;}
.crt-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:start;}
.crt-content-main{min-width:0;}
.crt-h1{font-size:28px;line-height:1.35;margin:0 0 14px;color:var(--ink);}
.crt-h2{font-size:22px;margin:30px 0 12px;color:var(--ink);border-left:4px solid var(--bronze);padding-left:12px;}
.crt-h3{font-size:18px;margin:22px 0 10px;color:var(--teal);}
.crt-content-main h2,.crt-page-main h2{scroll-margin-top:80px;}
.crt-content-main h3,.crt-page-main h3{scroll-margin-top:80px;}
.crt-article-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--muted);border-bottom:1px dashed var(--line);padding-bottom:12px;margin-bottom:18px;}
.crt-meta-kw{color:var(--bronze);}

/* ===== 右侧目录 ===== */
.crt-toc-aside{position:sticky;top:calc(var(--header-h) + 16px);max-height:calc(100vh - var(--header-h) - 32px);overflow-y:auto;}
.crt-toc-panel{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:10px 12px;}
.crt-toc-panel>summary{font-weight:600;cursor:pointer;color:var(--ink);list-style:none;padding:2px 0;}
.crt-toc-panel>summary::-webkit-details-marker{display:none;}
.crt-toc-panel>summary::after{content:"▾";float:right;color:var(--bronze);transition:transform .2s;transform:rotate(0);}
.crt-toc-panel[open]>summary::after{transform:rotate(180deg);}
.crt-toc-list{list-style:none;margin:8px 0 0;padding:0;font-size:14px;}
.crt-toc-list li{margin:6px 0;line-height:1.5;}
.crt-toc-list li.lvl-3{padding-left:14px;}
.crt-toc-list a{color:var(--muted);}
.crt-toc-list a:hover{color:var(--bronze);}

/* ===== 列表页布局 ===== */
.crt-list-layout{padding-top:22px;padding-bottom:48px;}
.crt-list-grid{grid-template-columns:240px minmax(0,1fr);}
.crt-list-layout .crt-layout-grid{grid-template-columns:240px minmax(0,1fr);gap:28px;align-items:start;}
.crt-cat-side{position:sticky;top:calc(var(--header-h) + 16px);}
.crt-cat-panel{border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:10px 12px;}
.crt-cat-panel>summary{font-weight:600;cursor:pointer;color:var(--ink);list-style:none;padding:2px 0;}
.crt-cat-panel>summary::-webkit-details-marker{display:none;}
.crt-cat-panel>summary::after{content:"▾";float:right;color:var(--bronze);transition:transform .2s;transform:rotate(0);}
.crt-cat-panel[open]>summary::after{transform:rotate(180deg);}
.crt-category-list{list-style:none;margin:8px 0 0;padding:0;}
.crt-category-list li{margin:4px 0;display:flex;flex-direction:column;}
.crt-category-list a{padding:6px 8px;border-radius:6px;color:var(--text);}
.crt-category-list a:hover,.crt-category-list a.active{background:rgba(62,124,140,.14);color:var(--teal);font-weight:600;}
.crt-cat-desc{font-size:12px;color:var(--muted);padding:0 8px 4px;}
.crt-cat-content .crt-item-list{list-style:none;margin:18px 0 0;padding:0;}
.crt-item{padding:16px 0;border-bottom:1px solid var(--line);}
.crt-item-title{font-size:18px;font-weight:600;color:var(--ink);}
.crt-item-sum{margin:6px 0 4px;color:var(--muted);}
.crt-item-date{font-size:12px;color:var(--muted);}
.crt-list-desc{color:var(--muted);margin:10px 0 4px;}
.crt-pagination{margin:24px 0;display:flex;gap:8px;}
.crt-pagination a,.crt-pagination .crt-page-current{padding:6px 12px;border:1px solid var(--line);border-radius:6px;}
.crt-pagination .crt-page-current{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ===== 表格 ===== */
table.crt-spec{border-collapse:collapse;width:100%;margin:14px 0;font-size:15px;background:var(--surface);}
.crt-content-main table,.crt-page-main table{border-collapse:collapse;width:100%;margin:14px 0;font-size:15px;background:var(--surface);border:1px solid #cbd5d8;}
table.crt-spec th,table.crt-spec td,.crt-content-main table th,.crt-content-main table td,.crt-page-main table th,.crt-page-main table td{border:1px solid #cbd5d8;padding:9px 12px;text-align:left;vertical-align:top;}
table.crt-spec th,.crt-content-main table th,.crt-page-main table th{background:var(--ink);color:#fff;font-weight:600;}
.crt-content-main table tr:nth-child(even) td,.crt-page-main table tr:nth-child(even) td,table.crt-spec tr:nth-child(even) td{background:#F0ECE4;}

/* ===== FAQ ===== */
.crt-faq-block{margin:26px 0;border-top:2px solid var(--bronze);padding-top:14px;}
.crt-faq-block h2{scroll-margin-top:80px;}
.crt-faq-block details{border:1px solid var(--line);border-radius:8px;background:var(--surface);margin:10px 0;padding:0 14px;}
.crt-faq-block summary{cursor:pointer;font-weight:600;padding:12px 0;color:var(--ink);}
.crt-faq-block summary::-webkit-details-marker{color:var(--bronze);}
.crt-faq-block details p{margin:0 0 12px;color:var(--text);}

/* ===== 页脚 ===== */
.crt-footer{background:var(--ink);color:#CFC9C0;margin-top:40px;}
.crt-footer-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:36px 0;}
.crt-footer-col h3{color:#fff;font-size:16px;margin:0 0 12px;}
.crt-footer-col p{font-size:14px;line-height:1.7;}
.crt-footer-col ul{list-style:none;margin:0;padding:0;}
.crt-footer-col li{margin:6px 0;}
.crt-footer-col a{color:#CFC9C0;}
.crt-footer-col a:hover{color:var(--bronze);}
.crt-footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:12px 0;font-size:13px;color:#9AA4A4;}

/* ===== 首页区块 ===== */
.crt-hero{background:linear-gradient(135deg,#13242B 0%,#1d3a44 100%);color:#fff;padding:48px 0;}
.crt-hero-inner{display:flex;align-items:center;gap:30px;flex-wrap:wrap;}
.crt-hero-text{flex:1;min-width:300px;}
.crt-hero h1{font-size:34px;margin:0 0 12px;color:#fff;}
.crt-hero-sub{font-size:16px;color:#D7D0C6;margin:0 0 20px;line-height:1.7;}
.crt-hero-cta{display:flex;gap:12px;flex-wrap:wrap;}
.crt-hero-art{flex:0 0 auto;}
.crt-btn{display:inline-block;padding:10px 22px;border-radius:24px;border:1px solid var(--bronze);color:var(--bronze);font-weight:600;}
.crt-btn:hover{background:var(--bronze);color:#fff;}
.crt-btn-primary{background:var(--bronze);color:#fff;border-color:var(--bronze);}
.crt-btn-primary:hover{background:#a8631f;}
.crt-band{padding:40px 0;}
.crt-band-alt{background:var(--surface);}
.crt-sec-title{font-size:24px;color:var(--ink);margin:0 0 8px;text-align:center;}
.crt-sec-lead{color:var(--muted);text-align:center;max-width:760px;margin:0 auto 24px;}
.crt-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;}
.crt-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:18px;color:var(--text);transition:transform .15s,border-color .15s;}
.crt-card:hover{transform:translateY(-3px);border-color:var(--bronze);}
.crt-card h3{margin:0 0 8px;color:var(--ink);font-size:17px;}
.crt-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.6;}
.crt-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;}
.crt-tag{background:rgba(62,124,140,.12);color:var(--teal);border:1px solid rgba(62,124,140,.3);border-radius:18px;padding:6px 16px;font-size:14px;}
.crt-baseline{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;}
.crt-baseline-item{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:8px;padding:16px;}
.crt-baseline-item h3{margin:0 0 8px;color:var(--ink);font-size:16px;}
.crt-baseline-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.65;}
.crt-feat-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px;}
.crt-feat-list li{padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:8px;}
.crt-feat-list a{font-weight:600;color:var(--ink);font-size:16px;}
.crt-feat-list p{margin:6px 0 0;color:var(--muted);font-size:14px;}

/* ===== 页面内容卡片 ===== */
.crt-page-wrap{padding:30px 0 48px;}
.crt-page-main{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:28px 32px;max-width:860px;margin:0 auto;}

/* ===== 归档 ===== */
.crt-arch-list{columns:2;column-gap:30px;list-style:none;padding:0;margin:8px 0 22px;}
.crt-arch-list li{break-inside:avoid;padding:4px 0;}

/* ===== 悬浮胶囊 ===== */
.crt-capsule{position:fixed;right:14px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:6px;background:linear-gradient(160deg,#C2772B,#9a5e1f);border-radius:26px;padding:8px 6px;z-index:90;box-shadow:0 6px 18px rgba(19,36,43,.35);}
.crt-cap-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;width:48px;height:48px;border:0;background:none;color:#fff;cursor:pointer;font-size:12px;gap:2px;border-radius:18px;text-decoration:none;}
.crt-cap-btn:hover{background:rgba(255,255,255,.18);}
.crt-cap-ico{font-size:18px;line-height:1;}
.crt-cap-txt{font-size:11px;}

/* ===== 名片弹层 ===== */
.crt-card-mask{position:fixed;inset:0;background:rgba(19,36,43,.62);display:flex;align-items:center;justify-content:center;z-index:200;}
.crt-card-mask[hidden]{display:none;}
.crt-card-pop{position:relative;background:#fff;padding:8px;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.4);}
.crt-card-pop img{display:block;width:300px;height:500px;object-fit:contain;}
.crt-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:0;background:var(--ink);color:#fff;font-size:20px;cursor:pointer;line-height:1;}

/* ===== 经验 callout ===== */
.crt-callout{border-left:4px solid var(--teal);background:rgba(62,124,140,.08);padding:12px 16px;border-radius:6px;margin:16px 0;}

/* ===== 响应式折叠（断点 1024） ===== */
@media (max-width:1024px){
  .crt-nav-toggle{display:block;}
  .crt-nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--ink);padding:8px 16px 16px;border-top:1px solid rgba(255,255,255,.12);}
  .crt-nav.crt-open{display:flex;}
  .crt-nav>a{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.08);}
  .crt-nav-item{position:static;}
  .crt-nav-sub{position:static;display:none;background:rgba(255,255,255,.06);border:0;border-radius:0;padding:0 0 0 12px;min-width:0;}
  .crt-nav-item:hover .crt-nav-sub,.crt-nav-sub-btn[aria-expanded="true"]+.crt-nav-sub{display:flex;}
  .crt-layout-grid{grid-template-columns:1fr;}
  .crt-toc-aside{position:static;max-height:none;margin-top:18px;}
  .crt-list-layout .crt-layout-grid{grid-template-columns:1fr;}
  .crt-cat-side{position:static;}
  .crt-footer-inner{grid-template-columns:repeat(2,1fr);}
  .crt-hero h1{font-size:28px;}
  .crt-arch-list{columns:1;}
}
@media (max-width:560px){
  .crt-footer-inner{grid-template-columns:1fr;}
  .crt-page-main{padding:20px 16px;}
}