/* diecast.模具设计.中国 —— 原创「熔钢」暗色科技主题（.dc- 前缀，独立实现） */
:root{
  --dc-bg:#0d1117;
  --dc-surface:#151b24;
  --dc-surface2:#1b2330;
  --dc-border:#2a3340;
  --dc-border2:#36424f;
  --dc-text:#d7dee8;
  --dc-muted:#8b97a7;
  --dc-molten:#ff6a2b;
  --dc-azure:#36b6ff;
  --dc-gold:#e7b15a;
  --dc-inset:16px;            /* 面包屑 / 正文 H2 左缘统一内缩，保证对齐 */
  --dc-maxw:1180px;
  --dc-radius:14px;
  --dc-font:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--dc-bg);color:var(--dc-text);
  font-family:var(--dc-font);line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--dc-azure);text-decoration:none}
a:hover{color:var(--dc-molten)}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.35;font-weight:700;color:#fff}

/* 容器：面包屑与正文同处容器内容左缘，左缘天然对齐 */
.dc-container{max-width:var(--dc-maxw);margin:0 auto;padding:0 24px}
.dc-crumbs{padding:18px 0 10px;font-size:13px;color:var(--dc-muted)}
.dc-crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.dc-crumbs li{display:inline-flex;align-items:center}
.dc-crumbs a{color:var(--dc-muted)}
.dc-crumbs a:hover{color:var(--dc-azure)}
.dc-crumbs__sep{color:var(--dc-border2);margin:0 2px}
.dc-crumbs [aria-current="page"]{color:var(--dc-text)}

/* 布局 */
.dc-layout{display:grid;gap:32px;align-items:start;padding-bottom:48px}
.dc-layout--detail{grid-template-columns:minmax(0,1fr) 250px}
.dc-layout--list{grid-template-columns:230px minmax(0,1fr)}
.dc-layout--page{grid-template-columns:minmax(0,860px);justify-content:center}
.dc-doc{min-width:0}
.dc-doc--page{max-width:860px;margin:0 auto;width:100%}

/* 标题 */
.dc-title{font-size:30px;margin:4px 0 18px;letter-spacing:.2px}
.dc-subtitle{font-size:20px;margin:28px 0 12px;color:#fff;border-left:3px solid var(--dc-molten);padding-left:10px}
.dc-section__title{font-size:24px;margin:0 0 18px;color:#fff}

/* 正文排版 */
.dc-body{font-size:16px;color:var(--dc-text)}
.dc-body p{margin:14px 0}
.dc-body h2{font-size:22px;margin:34px 0 12px;padding-top:8px;color:#fff;
  border-top:1px solid var(--dc-border);scroll-margin-top:84px}
.dc-body h3{font-size:18px;margin:24px 0 10px;color:#eaf1f8;scroll-margin-top:84px}
.dc-body ul,.dc-body ol{padding-left:22px;margin:14px 0}
.dc-body li{margin:7px 0}
.dc-body blockquote{
  margin:18px 0;padding:14px 18px;background:var(--dc-surface);
  border-left:3px solid var(--dc-azure);border-radius:10px;color:#cdd8e4}
.dc-body blockquote p{margin:6px 0}
.dc-body strong{color:#fff}
.dc-body code{background:var(--dc-surface2);padding:2px 6px;border-radius:6px;font-size:14px;color:var(--dc-gold)}

/* 摘要块 / 关键词 */
.dc-body blockquote:first-child{border-left-color:var(--dc-molten);background:linear-gradient(180deg,#1c232e,#151b24)}
.dc-body > p:has(strong){}
.dc-kw{display:inline-block}

/* 表格（table_class: data） */
.dc-body table.data{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;
  background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:10px;overflow:hidden}
.dc-body table.data th{background:var(--dc-surface2);color:#fff;text-align:left;padding:10px 12px;border-bottom:1px solid var(--dc-border2)}
.dc-body table.data td{padding:9px 12px;border-bottom:1px solid var(--dc-border);color:#cdd8e4}
.dc-body table.data tr:last-child td{border-bottom:none}
.dc-body table.data tr:nth-child(even) td{background:rgba(255,255,255,.02)}

/* 标签 */
.tag-text{display:inline-block;background:var(--dc-surface2);color:var(--dc-muted);
  border:1px solid var(--dc-border);border-radius:999px;padding:1px 10px;font-size:12.5px;margin:2px 3px 2px 0}

/* FAQ 裸 details */
.dc-body details{border:1px solid var(--dc-border);border-radius:10px;margin:12px 0;background:var(--dc-surface);overflow:hidden}
.dc-body details summary{cursor:pointer;padding:12px 16px;font-weight:600;color:#eaf1f8;list-style:none}
.dc-body details summary::-webkit-details-marker{display:none}
.dc-body details summary::before{content:"＋";color:var(--dc-molten);margin-right:8px;font-weight:700}
.dc-body details[open] summary::before{content:"－"}
.dc-body details p{padding:0 16px 14px;margin:0}

/* 经验 callout */
.dc-body blockquote:has(strong){}

/* TOC */
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow-y:auto}
.dc-toc-nav{background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:12px;padding:14px 16px}
.dc-toc-nav__title{margin:0 0 10px;font-size:13px;color:var(--dc-muted);text-transform:uppercase;letter-spacing:1px}
.dc-toc-nav ul{list-style:none;margin:0;padding:0}
.dc-toc-nav li{margin:6px 0}
.dc-toc-nav__lvl-3{padding-left:14px;font-size:14px}
.dc-toc-nav a{color:var(--dc-muted);font-size:14px}
.dc-toc-nav a:hover{color:var(--dc-azure)}

/* 头部 */
.dc-header{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(13,17,23,.86);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--dc-border)}
.dc-header__inner{max-width:var(--dc-maxw);margin:0 auto;padding:0 24px;height:60px;
  display:flex;align-items:center;justify-content:space-between}
.dc-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700}
.dc-brand__mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--dc-molten),var(--dc-gold));color:#11141b;font-weight:800;font-size:15px}
.dc-brand__name{font-size:17px;display:flex;flex-direction:column;line-height:1.1}
.dc-brand__name small{font-size:11px;color:var(--dc-muted);font-weight:500}
.dc-nav{display:flex;align-items:center;gap:6px}
.dc-nav__link{color:var(--dc-text);padding:8px 12px;border-radius:8px;font-size:14.5px;background:none;border:none;cursor:pointer;font-family:inherit}
.dc-nav__link:hover{color:#fff;background:var(--dc-surface2)}
.dc-nav__drop{position:relative}
.dc-nav__menu{position:absolute;top:100%;left:0;min-width:200px;margin-top:6px;background:var(--dc-surface);
  border:1px solid var(--dc-border);border-radius:10px;padding:6px;display:none;flex-direction:column;box-shadow:0 12px 30px rgba(0,0,0,.4)}
.dc-nav__menu::before{content:"";position:absolute;top:-8px;left:0;right:0;height:8px}
.dc-nav__drop:hover .dc-nav__menu,.dc-nav__drop:focus-within .dc-nav__menu{display:flex}
.dc-nav__menu a{padding:8px 12px;border-radius:7px;color:var(--dc-text);font-size:14px}
.dc-nav__menu a:hover{background:var(--dc-surface2);color:#fff}
.dc-nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.dc-nav__toggle span{width:22px;height:2px;background:var(--dc-text);border-radius:2px}

/* 首页 hero */
.dc-home{padding-top:6px}
.dc-hero{position:relative;margin:14px 0 30px;border-radius:18px;overflow:hidden;
  background:radial-gradient(120% 140% at 80% -10%,rgba(255,106,43,.22),transparent 55%),
             radial-gradient(120% 140% at 0% 110%,rgba(54,182,255,.18),transparent 55%),#10161f;
  border:1px solid var(--dc-border)}
.dc-hero__bg{position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:34px 34px;mask-image:radial-gradient(120% 120% at 50% 0%,#000,transparent 75%)}
.dc-hero__inner{position:relative;padding:54px 40px;max-width:880px}
.dc-hero__kicker{color:var(--dc-gold);font-weight:600;letter-spacing:2px;font-size:13px;margin:0 0 10px}
.dc-hero__title{font-size:34px;margin:0 0 14px;line-height:1.3}
.dc-hero__lead{color:#cdd8e4;font-size:16px;margin:0 0 22px}
.dc-hero__cta{display:flex;gap:12px;flex-wrap:wrap}
.dc-hero__chips{list-style:none;display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:24px 0 0}
.dc-hero__chips li{background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--dc-muted)}
.dc-btn{display:inline-block;padding:11px 22px;border-radius:10px;border:1px solid var(--dc-border2);
  color:#fff;background:var(--dc-surface2);font-weight:600;font-size:14.5px}
.dc-btn:hover{color:#fff;border-color:var(--dc-azure)}
.dc-btn--primary{background:linear-gradient(135deg,var(--dc-molten),#ff8a4d);border:none;color:#11141b}
.dc-btn--primary:hover{color:#11141b;filter:brightness(1.06)}

/* 区块 */
.dc-block{padding:22px 0}
.dc-block--dark{background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:16px;padding:26px 28px;margin:18px 0}
.dc-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.dc-card{position:relative;background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:14px;
  padding:20px 18px 18px;color:var(--dc-text);transition:.18s;overflow:hidden}
.dc-card:hover{border-color:var(--dc-molten);transform:translateY(-3px)}
.dc-card__no{position:absolute;top:10px;right:14px;font-size:30px;font-weight:800;color:rgba(255,106,43,.16)}
.dc-card__title{margin:0 0 8px;font-size:18px;color:#fff}
.dc-card__desc{margin:0;font-size:13.5px;color:var(--dc-muted);line-height:1.6}
.dc-pill-row{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 18px}
.dc-pill{background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:999px;padding:8px 16px;color:var(--dc-text);font-size:14px}
.dc-pill:hover{border-color:var(--dc-azure);color:#fff}
.dc-linklist{list-style:none;padding:0;margin:0}
.dc-linklist li{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--dc-border)}
.dc-linklist a{color:var(--dc-text);font-weight:600}
.dc-linklist a:hover{color:var(--dc-azure)}
.dc-linklist span{color:var(--dc-muted);font-size:13px;white-space:nowrap}
.dc-steps{margin:0;padding-left:0;list-style:none;counter-reset:s}
.dc-steps li{counter-increment:s;position:relative;padding:12px 0 12px 46px;border-bottom:1px solid var(--dc-border)}
.dc-steps li::before{content:counter(s);position:absolute;left:0;top:10px;width:30px;height:30px;border-radius:8px;
  display:grid;place-items:center;background:linear-gradient(135deg,var(--dc-azure),#7fd0ff);color:#0d1117;font-weight:800}
.dc-steps b{color:#fff}

/* 列表页 */
.dc-cat-side{position:sticky;top:84px;align-self:start}
.dc-cat-side__title{font-size:13px;color:var(--dc-muted);text-transform:uppercase;letter-spacing:1px;margin:0 0 10px}
.category-list{list-style:none;margin:0;padding:0;border:1px solid var(--dc-border);border-radius:12px;overflow:hidden;background:var(--dc-surface)}
.category-list li a{display:block;padding:11px 16px;color:var(--dc-text);border-bottom:1px solid var(--dc-border);font-size:14.5px}
.category-list li:last-child a{border-bottom:none}
.category-list li a:hover,.category-list li a.is-active{background:var(--dc-surface2);color:#fff;border-left:3px solid var(--dc-molten);padding-left:13px}
.dc-catnav{margin:0}
.dc-catnav>summary{list-style:none;cursor:pointer;-webkit-user-select:none;user-select:none}
.dc-catnav>summary::-webkit-details-marker{display:none}
@media (max-width:980px){
  .dc-cat-side{position:static}
  .dc-catnav{background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:12px;margin-bottom:16px}
  .dc-catnav>summary{display:flex;align-items:center;justify-content:space-between;margin:0;padding:14px 16px}
  .dc-catnav>summary::after{content:"▸";display:inline-block;color:var(--dc-muted);transition:.2s;font-size:14px}
  .dc-catnav[open]>summary::after{transform:rotate(90deg)}
  .dc-catnav>.category-list{margin:0;border:none;border-radius:0;background:transparent}
  .dc-catnav>.category-list li a{border-radius:0;padding-left:16px}
}
.dc-list__lead{color:var(--dc-muted);margin:0 0 18px}
.dc-article-list{list-style:none;margin:0;padding:0}
.dc-article-list li{padding:16px 0;border-bottom:1px solid var(--dc-border)}
.dc-article-list__t{font-size:17px;font-weight:600;color:#fff}
.dc-article-list__t:hover{color:var(--dc-azure)}
.dc-article-list__cat{display:inline-block;margin-left:10px;font-size:12px;color:var(--dc-gold);
  background:rgba(231,177,90,.1);border-radius:6px;padding:1px 8px}
.dc-article-list__s{margin:6px 0 0;color:var(--dc-muted);font-size:14px}
.dc-cat-faq{margin-top:26px}
.dc-cat-faq details{border:1px solid var(--dc-border);border-radius:10px;margin:10px 0;background:var(--dc-surface)}
.dc-cat-faq summary{cursor:pointer;padding:11px 15px;font-weight:600;color:#eaf1f8;list-style:none}
.dc-cat-faq summary::-webkit-details-marker{display:none}
.dc-cat-faq details p{padding:0 15px 12px;margin:0;color:var(--dc-muted)}

/* 悬浮胶囊 */
.dc-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px}
.dc-capsule__btn{width:54px;height:54px;border-radius:999px;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--dc-molten),var(--dc-gold));color:#11141b;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  box-shadow:0 8px 22px rgba(255,106,43,.35);font-weight:700}
.dc-capsule__btn:hover{filter:brightness(1.06)}
.dc-capsule__ico{font-size:18px;line-height:1}
.dc-capsule__txt{font-size:11px}

/* 名片弹窗 */
.dc-modal{position:fixed;inset:0;z-index:80;display:grid;place-items:center}
.dc-modal[hidden]{display:none}
.dc-modal__mask{position:absolute;inset:0;background:rgba(5,8,12,.7);backdrop-filter:blur(3px)}
.dc-modal__panel{position:relative;background:var(--dc-surface);border:1px solid var(--dc-border);border-radius:14px;padding:14px;
  box-shadow:0 20px 60px rgba(0,0,0,.55)}
.dc-modal__img{display:block;border-radius:8px;width:300px;height:500px;object-fit:contain;background:#fff}
.dc-modal__close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:none;
  background:var(--dc-surface2);color:#fff;font-size:20px;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.4)}

/* 页脚 */
.dc-footer{background:var(--dc-surface);border-top:1px solid var(--dc-border);margin-top:30px}
.dc-footer__inner{max-width:var(--dc-maxw);margin:0 auto;padding:36px 24px 18px;display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:24px}
.dc-footer__desc{color:var(--dc-muted);font-size:14px;margin:12px 0 0;max-width:380px}
.dc-footer__col h3{font-size:14px;color:var(--dc-gold);margin:0 0 12px;letter-spacing:1px}
.dc-footer__col ul{list-style:none;margin:0;padding:0}
.dc-footer__col li{margin:7px 0;font-size:13.5px;color:var(--dc-muted)}
.dc-footer__col a{color:var(--dc-muted)}
.dc-footer__col a:hover{color:var(--dc-azure)}
.dc-footer__bar{max-width:var(--dc-maxw);margin:0 auto;padding:14px 24px;border-top:1px solid var(--dc-border);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--dc-muted);font-size:12.5px}

/* 响应式 */
@media (max-width:980px){
  .dc-layout--detail{grid-template-columns:1fr}
  .toc-aside{display:none}
  .dc-layout--list{grid-template-columns:1fr}
  .dc-cat-side{position:static;margin-bottom:18px}
  .dc-footer__inner{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .dc-nav{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;gap:4px;
    background:var(--dc-surface);border-bottom:1px solid var(--dc-border);padding:10px}
  .dc-nav.is-open{display:flex}
  .dc-nav__drop{position:static}
  .dc-nav__menu{position:static;display:flex;box-shadow:none;border:none;background:none;padding-left:10px}
  .dc-nav__toggle{display:flex}
  .dc-hero__inner{padding:38px 22px}
  .dc-hero__title{font-size:26px}
  .dc-title{font-size:25px}
  .dc-footer__inner{grid-template-columns:1fr}
  .dc-capsule{right:10px}
  .dc-capsule__btn{width:48px;height:48px}
}