/* roulang page: index */
:root{
  --ink:#33265C;
  --ink-deep:#221A3E;
  --celadon:#2E7D6F;
  --amber:#C9843A;
  --bg:#FAF6F0;
  --bg-2:#F2ECE3;
  --bg-3:#F7F2EA;
  --line:#E3DBD0;
  --border-soft:#EDE7DE;
  --text:#241F33;
  --muted:#6B647C;
  --ph:#9C96AA;
  --danger:#B4552F;
  --disabled:#B9B3C2;
  --r-card:12px;
  --r-btn:8px;
  --r-tag:999px;
  --sh:0 1px 2px rgba(35,26,62,.05);
  --sh-hover:0 8px 24px rgba(35,26,62,.08);
  --serif:"Noto Serif SC",Georgia,"Songti SC",serif;
  --sans:"Noto Sans SC",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --side-w:264px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.75;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:600;letter-spacing:-.01em;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}

/* ---------- 侧栏导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);z-index:60;
  background:var(--bg);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:26px 20px 24px;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 8px 22px}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
}
.brand-text{font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink);letter-spacing:.01em}
.brand-sub{display:block;font-family:var(--sans);font-size:11.5px;font-weight:400;color:var(--muted);letter-spacing:0}
.side-nav{flex:1 1 auto}
.side-nav li + li{margin-top:2px}
.nav-link{
  position:relative;display:flex;align-items:center;height:44px;padding:0 12px;
  border-radius:var(--r-btn);font-size:14.5px;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.nav-link:hover{background:var(--bg-2);color:var(--ink)}
.nav-link.is-active{background:var(--bg-2);color:var(--ink);font-weight:600}
.nav-link.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--amber);
}
.side-foot{border-top:1px solid var(--line);padding-top:18px;margin-top:14px}
.side-cta{
  display:inline-block;font-size:13px;font-weight:500;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:color .2s ease,border-color .2s ease;
}
.side-cta:hover{color:var(--celadon);border-color:var(--celadon)}
.side-contact{margin-top:12px;font-size:12.5px;color:var(--ph);line-height:1.6}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:70;
  align-items:center;justify-content:space-between;
  height:60px;padding:0 18px;background:var(--bg);
  border-bottom:1px solid var(--line);
}
.topbar .brand{padding:0}
.menu-btn{
  width:40px;height:40px;border:1px solid var(--line);background:transparent;
  border-radius:var(--r-btn);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:background .2s ease;
}
.menu-btn:hover{background:var(--bg-2)}
.menu-btn span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(34,26,62,.4);opacity:0;
  pointer-events:none;transition:opacity .25s ease;z-index:80;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:80vw;max-width:320px;z-index:90;
  background:var(--bg);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s ease;
  padding:22px 18px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .brand{padding:0 4px 20px}
.drawer-close{
  position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:8px;
  border:1px solid var(--line);background:transparent;cursor:pointer;color:var(--muted);
}

/* ---------- 页面骨架 ---------- */
.page{margin-left:var(--side-w)}
.container{max-width:1200px;margin:0 auto;padding:0 40px}
.section{padding:72px 0}
.section--alt{background:var(--bg-2)}
.section--band{background:var(--bg-3);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section + .section{border-top:1px solid var(--border-soft)}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head h2{font-size:30px}
.sec-desc{margin-top:14px;font-size:15.5px;color:var(--muted);line-height:1.85}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.08em;color:var(--celadon);
  border:1px solid rgba(46,125,111,.35);border-radius:var(--r-tag);
  padding:2px 12px;margin-bottom:14px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:500;
  border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--ink-deep);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--bg-2)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn-ghost-light:hover{background:rgba(255,255,255,.14)}
.btn[disabled],.btn.is-disabled{background:var(--disabled);color:var(--ph);cursor:not-allowed;transform:none}
.text-link{color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:2px;font-size:14px;transition:color .2s ease,border-color .2s ease}
.text-link:hover{color:var(--celadon);border-color:var(--celadon)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink-deep)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,rgba(34,26,62,.74) 0%,rgba(34,26,62,.58) 45%,rgba(250,246,240,.42) 100%);
}
.hero-fade{
  position:absolute;left:0;right:0;bottom:0;height:110px;z-index:3;
  background:linear-gradient(to bottom,rgba(250,246,240,0),var(--bg));
}
.hero-inner{
  position:relative;z-index:4;max-width:1200px;margin:0 auto;padding:0 40px;
  min-height:560px;display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
}
.hero-copy{max-width:620px;color:#fff}
.hero-copy .eyebrow{border-color:rgba(255,255,255,.45);color:#F1E4D2}
.hero-copy h1{font-size:40px;color:#fff;margin-bottom:18px}
.hero-sub{font-size:18px;color:#E7E1F0;margin-bottom:16px}
.hero-lead{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.78);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-visual{position:relative;padding:24px 0 56px}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);
  clip-path:polygon(9% 0,100% 0,100% 100%,0 92%);
  transform:translateY(-10px);
}
.hero-stats{
  position:absolute;right:12px;bottom:14px;z-index:5;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px 20px;display:flex;gap:26px;box-shadow:var(--sh);
}
.hero-stat{min-width:78px}
.hero-stat b{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;color:var(--ink)}
.hero-stat span{font-size:12px;color:var(--muted)}

/* ---------- 指标看板 ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.metric-card{
  border:1px solid var(--border-soft);border-radius:var(--r-card);
  background:var(--bg);padding:24px;transition:border-color .2s ease;
}
.metric-card:hover{border-color:var(--ink)}
.metric-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:34px;line-height:1.15;color:var(--ink);font-weight:600;
}
.metric-label{margin-top:10px;font-size:13px;color:var(--muted);line-height:1.6}

/* ---------- 服务矩阵（错位网格） ---------- */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px}
.matrix-item{padding:26px 0;border-bottom:1px solid var(--line)}
.matrix-item:nth-child(3),.matrix-item:nth-child(6){margin-top:32px}
.matrix-icon{
  width:38px;height:38px;border-radius:9px;background:var(--bg-2);color:var(--ink);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.matrix-item h3{font-size:19px;margin-bottom:10px}
.matrix-item p{font-size:14px;color:var(--muted);line-height:1.8}

/* ---------- 专题横滑 ---------- */
.rail{display:flex;gap:20px;overflow-x:auto;padding-bottom:14px;scroll-snap-type:x mandatory}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.rail-card{
  flex:0 0 268px;scroll-snap-align:start;background:var(--bg);
  border:1px solid var(--border-soft);border-radius:var(--r-card);overflow:hidden;
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.rail-card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px);border-color:var(--line)}
.rail-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--bg-2)}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease-out}
.rail-card:hover .rail-thumb img{transform:scale(1.02)}
.rail-body{padding:16px 18px 18px}
.rail-body h3{font-size:16px}
.rail-body span{display:block;margin-top:8px;font-size:12.5px;color:var(--celadon)}

/* ---------- 对比条 ---------- */
.compare{border-top:1px solid var(--line)}
.compare-head,.compare-row{
  display:grid;grid-template-columns:150px 1fr 1fr;gap:24px;align-items:center;
  padding:18px 0;border-bottom:1px solid var(--line);
}
.compare-head{font-size:13px;color:var(--muted);letter-spacing:.04em}
.compare-key{font-size:14px;color:var(--text);font-weight:500}
.bar-track{height:12px;border-radius:6px;background:var(--bg-2);overflow:hidden}
.bar{height:100%;border-radius:6px}
.bar--gray{background:var(--disabled)}
.bar--accent{background:var(--amber)}
.compare-val{display:block;margin-top:8px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:24px;padding-top:34px}
.timeline::before{content:"";position:absolute;left:0;right:0;top:6px;height:1px;background:var(--line)}
.tl-node{position:relative;padding-top:22px}
.tl-node::before{
  content:"";position:absolute;top:0;left:0;width:10px;height:10px;border-radius:50%;
  background:var(--ink);transform:translateY(-4px);
}
.tl-node.is-active::before{background:var(--amber)}
.tl-year{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--celadon)}
.tl-node h3{font-size:16px;margin:8px 0 8px}
.tl-node p{font-size:13px;color:var(--muted);line-height:1.75}

/* ---------- 作品卡 ---------- */
.work-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{
  background:var(--bg);border:1px solid var(--border-soft);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.work-card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px);border-color:var(--line)}
.work-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--bg-2);border-bottom:1px solid var(--border-soft)}
.work-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease-out}
.work-card:hover .work-thumb img{transform:scale(1.02)}
.work-body{padding:16px}
.work-body h3{font-size:15.5px;line-height:1.55;color:var(--text);transition:color .2s ease}
.work-card:hover h3{color:var(--ink)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{
  font-size:12px;color:var(--celadon);border:1px solid rgba(46,125,111,.35);
  border-radius:var(--r-tag);padding:1px 10px;line-height:1.7;
}
.tag--plain{color:var(--muted);border-color:var(--line)}
.work-meta{margin-top:12px;font-size:12.5px;color:var(--ph);font-variant-numeric:tabular-nums}

/* ---------- 场景条带 ---------- */
.band-list{display:flex;flex-direction:column}
.band-item{
  display:flex;gap:24px;align-items:flex-start;padding:26px 0;
  border-bottom:1px solid var(--line);
}
.band-item:first-child{border-top:1px solid var(--line)}
.band-icon{
  flex:0 0 96px;width:96px;height:72px;border-radius:10px;background:var(--bg-2);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
  border:1px solid var(--border-soft);
}
.band-body h3{font-size:18px;margin-bottom:8px}
.band-body p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:10px}

/* ---------- 资讯 ---------- */
.news-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:40px}
.news-lead{
  border:1px solid var(--border-soft);border-radius:var(--r-card);overflow:hidden;background:var(--bg);
  transition:box-shadow .2s ease,border-color .2s ease;
}
.news-lead:hover{box-shadow:var(--sh-hover);border-color:var(--line)}
.news-lead-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.news-lead-thumb img{width:100%;height:100%;object-fit:cover}
.news-lead-body{padding:22px}
.news-lead-body h3{font-size:21px;line-height:1.5}
.news-lead-body p{margin-top:12px;font-size:14px;color:var(--muted);line-height:1.8}
.news-list li{border-bottom:1px solid var(--line)}
.news-list li:first-child{border-top:1px solid var(--line)}
.news-item{
  display:flex;justify-content:space-between;gap:18px;align-items:baseline;
  padding:16px 12px;transition:background .2s ease;
}
.news-item:hover{background:var(--bg-3)}
.news-item h3{font-size:15px;font-weight:500;font-family:var(--sans);line-height:1.6}
.news-item time{font-size:12.5px;color:var(--ph);white-space:nowrap;font-variant-numeric:tabular-nums}

/* ---------- 保障 ---------- */
.guard-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 48px}
.guard-item{display:flex;gap:16px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.guard-icon{
  flex:0 0 40px;width:40px;height:40px;border-radius:9px;
  background:rgba(46,125,111,.1);color:var(--celadon);
  display:flex;align-items:center;justify-content:center;
}
.guard-item h3{font-size:17px;margin-bottom:6px}
.guard-item p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* ---------- 快速解答 ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px}
.quick-item{padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.quick-item h3{font-size:15px;font-weight:600;font-family:var(--sans);margin-bottom:8px}
.quick-item p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:14px 4px;background:transparent;border:0;
  text-align:left;cursor:pointer;font-size:16px;font-weight:500;color:var(--text);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--ink)}
.faq-icon{
  flex:0 0 16px;width:16px;height:16px;position:relative;
  transition:transform .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);border-radius:1px;
}
.faq-icon::before{left:0;right:0;top:7px;height:1.5px}
.faq-icon::after{top:0;bottom:0;left:7px;width:1.5px;transition:transform .2s ease}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .25s ease}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a p{padding:0 40px 20px 4px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- 表单 ---------- */
.form-layout{display:grid;grid-template-columns:1.15fr 1fr;gap:48px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;color:var(--muted);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--ink);box-shadow:0 0 0 2px rgba(201,132,58,.55);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--danger)}
.field-error{display:none;margin-top:8px;font-size:12px;color:var(--danger)}
.field.has-error .field-error{display:block}
.form-note{margin-top:14px;font-size:12.5px;color:var(--ph)}
.alert{border-radius:var(--r-btn);padding:12px 16px;font-size:14px;margin-bottom:20px}
.alert-success{background:rgba(46,125,111,.12);color:var(--celadon);border:1px solid rgba(46,125,111,.32)}
.alert-error{background:rgba(180,85,47,.1);color:var(--danger);border:1px solid rgba(180,85,47,.3)}
.trust-list li{padding:16px 0;border-bottom:1px solid var(--line)}
.trust-list li:first-child{border-top:1px solid var(--line)}
.trust-list h3{font-size:16px;margin-bottom:6px}
.trust-list p{font-size:13.5px;color:var(--muted);line-height:1.75}
.contact-box{margin-top:26px;padding:20px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg-2)}
.contact-box p{font-size:13.5px;color:var(--muted);line-height:1.9}

/* ---------- 收口条 ---------- */
.cta-band{background:var(--ink-deep);color:#fff}
.cta-inner{
  max-width:1200px;margin:0 auto;padding:52px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-inner h2{font-size:26px;color:#fff}
.cta-inner p{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.72);max-width:620px}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-deep);color:var(--ph)}
.foot-grid{
  max-width:1200px;margin:0 auto;padding:64px 40px 36px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
}
.foot-brand .brand-text{color:#fff}
.foot-brand p{margin-top:16px;font-size:13.5px;line-height:1.9;color:rgba(233,227,240,.66)}
.foot-col h3{font-size:14px;color:#fff;margin-bottom:16px;font-family:var(--sans);font-weight:600}
.foot-col li + li{margin-top:10px}
.foot-col a{font-size:13.5px;color:var(--ph);transition:color .2s ease}
.foot-col a:hover{color:var(--bg)}
.foot-bottom{
  max-width:1200px;margin:0 auto;padding:20px 40px 32px;
  border-top:1px solid rgba(233,227,240,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(233,227,240,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--side-w:240px}
  .metric-grid{grid-template-columns:repeat(3,1fr)}
  .timeline{grid-template-columns:repeat(3,1fr);row-gap:40px}
  .timeline::before{display:none}
  .tl-node{border-top:1px solid var(--line);padding-top:20px}
  .tl-node::before{display:none}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .page{margin-left:0}
  .topbar{display:flex}
  .hero-inner{grid-template-columns:1fr;min-height:auto;padding:64px 24px 80px}
  .hero-visual{padding:0}
  .hero-visual img{clip-path:none;transform:none;aspect-ratio:16/9}
  .hero-stats{position:static;margin-top:20px;justify-content:space-between}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .matrix-item:nth-child(3),.matrix-item:nth-child(6){margin-top:0}
  .work-grid{grid-template-columns:repeat(3,1fr)}
  .news-layout{grid-template-columns:1fr}
  .form-layout{grid-template-columns:1fr}
  .quick-grid{grid-template-columns:1fr;gap:0}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:48px 0}
  .sec-head h2{font-size:24px}
  .hero-copy h1{font-size:28px}
  .hero-sub{font-size:16px}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .metric-card{padding:18px}
  .metric-num{font-size:26px}
  .work-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .guard-grid{grid-template-columns:1fr}
  .compare-head,.compare-row{grid-template-columns:1fr;gap:12px}
  .compare-head{display:none}
  .band-item{flex-direction:column;gap:14px}
  .band-icon{flex:0 0 auto;width:72px;height:56px}
  .cta-inner{padding:40px 20px}
  .foot-grid{padding:48px 20px 28px;grid-template-columns:1fr;gap:28px}
  .foot-bottom{padding:18px 20px 28px}
}
@media (max-width:520px){
  .work-grid{grid-template-columns:1fr}
  .metric-grid{grid-template-columns:1fr}
  .matrix{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --ink:#33265C;
  --ink-deep:#221A3E;
  --celadon:#2E7D6F;
  --amber:#C9843A;
  --bg:#FAF6F0;
  --bg-2:#F2ECE3;
  --bg-3:#F7F2EA;
  --card:#FFFFFF;
  --line:#E3DBD0;
  --border-soft:#EDE7DE;
  --text:#241F33;
  --muted:#6B647C;
  --ph:#9C96AA;
  --danger:#B4552F;
  --disabled:#B9B3C2;
  --r-card:12px;
  --r-btn:8px;
  --r-tag:999px;
  --sh:0 1px 2px rgba(35,26,62,.05);
  --sh-hover:0 8px 24px rgba(35,26,62,.08);
  --serif:"Noto Serif SC",Georgia,"Songti SC",serif;
  --sans:"Noto Sans SC",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,monospace;
  --side-w:264px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.75;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;letter-spacing:-.01em;line-height:1.35;margin:0;color:var(--text)}
h1{font-size:40px}
h2{font-size:30px}
h3{font-size:20px;font-weight:600}
p{margin:0 0 1em}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.num,strong{font-variant-numeric:tabular-nums}

/* ---------- 骨架 ---------- */
.shell{display:flex;min-height:100vh}
.main{margin-left:var(--side-w);flex:1 1 auto;min-width:0;display:flex;flex-direction:column}
.container{max-width:1200px;margin:0 auto;padding:0 40px;width:100%}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);z-index:75;
  background:var(--bg);border-right:1px solid var(--line);
  padding:26px 18px 22px;display:flex;flex-direction:column;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 8px 22px}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;
}
.brand-text{font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink);letter-spacing:.01em;line-height:1.2}
.brand-sub{display:block;font-family:var(--sans);font-size:11.5px;font-weight:400;color:var(--muted);letter-spacing:0;margin-top:2px}
.side-nav{flex:1 1 auto}
.side-nav ul{list-style:none;margin:0;padding:0}
.side-nav li + li{margin-top:2px}
.nav-link{
  position:relative;display:flex;align-items:center;height:44px;padding:0 12px;
  border-radius:var(--r-btn);font-size:14.5px;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.nav-link:hover{background:var(--bg-2);color:var(--ink)}
.nav-link.is-active{background:var(--bg-2);color:var(--ink);font-weight:600}
.nav-link.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--amber);
}
.side-foot{border-top:1px solid var(--border-soft);padding-top:18px;margin-top:18px}
.side-cta{
  display:inline-block;font-size:13px;font-weight:500;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:2px;
  transition:color .2s ease,border-color .2s ease;
}
.side-cta:hover{color:var(--celadon);border-color:var(--celadon)}
.side-contact{font-size:12.5px;color:var(--ph);margin:12px 0 0}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:70;
  align-items:center;justify-content:space-between;
  height:60px;padding:0 18px;background:var(--bg);
  border-bottom:1px solid var(--line);
}
.topbar .brand{padding:0}
.topbar .brand-text{font-size:17px}
.menu-btn{
  width:40px;height:40px;border:1px solid var(--line);background:transparent;
  border-radius:var(--r-btn);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:background .2s ease;
}
.menu-btn:hover{background:var(--bg-2)}
.menu-btn span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(34,26,62,.4);opacity:0;
  pointer-events:none;transition:opacity .25s ease;z-index:80;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:80vw;max-width:320px;z-index:90;
  background:var(--bg);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s ease;
  padding:22px 18px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .brand{padding:0 4px 20px}
.drawer-close{
  position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:8px;
  border:1px solid var(--line);background:transparent;cursor:pointer;color:var(--muted);
  font-size:18px;line-height:1;transition:background .2s ease;
}
.drawer-close:hover{background:var(--bg-2)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:500;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--ink-deep);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--bg-2)}
.text-link{color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:2px;font-size:14px;transition:color .2s ease,border-color .2s ease}
.text-link:hover{color:var(--celadon);border-color:var(--celadon)}

/* ---------- 分类页头 ---------- */
.page-head{background:var(--bg);border-bottom:1px solid var(--line);padding:52px 0 44px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--muted);transition:color .2s ease}
.crumb a:hover{color:var(--ink)}
.crumb .sep{color:var(--ph)}
.head-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:44px;align-items:end}
.page-head h1{font-size:34px;max-width:780px}
.head-lead{margin:14px 0 0;font-size:16px;color:var(--muted);max-width:640px}
.head-stats{display:flex;list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.head-stats li{padding:0 22px;display:flex;flex-direction:column;gap:2px}
.head-stats li:first-child{padding-left:22px}
.head-stats li + li{border-left:1px solid var(--line)}
.head-stats strong{font-family:var(--mono);font-size:24px;font-weight:600;color:var(--ink);line-height:1.25}
.head-stats span{font-size:12.5px;color:var(--muted);white-space:nowrap}

/* ---------- 筛选工具条 ---------- */
.toolbar{
  position:sticky;top:0;z-index:60;background:var(--bg);
  border-bottom:1px solid var(--line);
}
.toolbar-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;padding-top:12px;padding-bottom:12px;min-height:64px;
}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.chip{
  font-size:13px;padding:6px 14px;border-radius:var(--r-tag);
  border:1px solid var(--border-soft);background:var(--card);color:var(--muted);
  cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:#fff}
.toolbar-right{display:flex;align-items:center;gap:14px}
.result-count{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.sort-wrap{position:relative;display:inline-block}
.sort-wrap select{
  appearance:none;-webkit-appearance:none;cursor:pointer;
  padding:8px 36px 8px 12px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--card);font-size:13.5px;color:var(--text);
  transition:border-color .2s ease;
}
.sort-wrap select:hover{border-color:var(--ink)}
.sort-wrap::after{
  content:"";position:absolute;right:15px;top:50%;width:6px;height:6px;
  border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);pointer-events:none;
}

/* ---------- 板块 ---------- */
.section{padding:72px 0}
.section--alt{background:var(--bg-2)}
.section--band{background:var(--bg-3);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:32px}
.section-lead{font-size:16px;color:var(--muted);margin:12px 0 0;max-width:760px}

/* ---------- 卡片列表 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.work-card{
  background:var(--card);border:1px solid var(--border-soft);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh);
  transition:box-shadow .2s ease,transform .2s ease;
}
.work-card:hover{box-shadow:var(--sh-hover);transform:translateY(-2px)}
.card-cover{aspect-ratio:4/3;overflow:hidden;background:var(--bg-2);border-bottom:1px solid var(--border-soft)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease-out}
.work-card:hover .card-cover img{transform:scale(1.02)}
.card-body{padding:16px 18px 18px}
.card-title{font-family:var(--serif);font-size:16px;font-weight:600;line-height:1.55;margin-bottom:10px;transition:color .2s ease}
.work-card:hover .card-title{color:var(--ink)}
.tag-row{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0 0 10px;padding:0}
.tag-row li{
  font-size:12px;color:var(--celadon);border:1px solid rgba(46,125,111,.35);
  border-radius:var(--r-tag);padding:1px 10px;white-space:nowrap;
}
.card-excerpt{font-size:13.5px;color:var(--muted);margin:0 0 12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-meta{font-family:var(--mono);font-size:12.5px;color:var(--ph);margin:0}
.load-more{display:flex;justify-content:center;margin-top:44px}

/* ---------- 数据窄条 ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;margin:26px 0 0;padding:0}
.stat-strip li{padding:0 26px;display:flex;flex-direction:column;gap:4px}
.stat-strip li:first-child{padding-left:0}
.stat-strip li + li{border-left:1px solid var(--line)}
.stat-strip strong{font-family:var(--mono);font-size:32px;font-weight:600;color:var(--ink);line-height:1.2}
.stat-strip span{font-size:13px;color:var(--muted)}

/* ---------- 编辑精选 ---------- */
.pick-list{display:grid;gap:20px}
.pick-card{
  display:grid;grid-template-columns:280px minmax(0,1fr);
  background:var(--card);border:1px solid var(--border-soft);
  border-radius:var(--r-card);overflow:hidden;
  transition:box-shadow .2s ease;
}
.pick-card:hover{box-shadow:var(--sh-hover)}
.pick-cover{aspect-ratio:4/3;background:var(--bg-2);border-right:1px solid var(--border-soft);overflow:hidden}
.pick-cover img{width:100%;height:100%;object-fit:cover}
.pick-body{padding:24px 28px;display:flex;flex-direction:column;justify-content:center}
.pick-index{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--amber);margin:0 0 8px}
.pick-body h3{margin-bottom:10px}
.pick-desc{font-size:14.5px;color:var(--muted);margin:0 0 14px;max-width:640px}

/* ---------- 标签云与专题 ---------- */
.topic-grid{display:grid;grid-template-columns:1.7fr 1fr;gap:56px;align-items:start}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:26px 0 0;padding:0}
.tag-cloud a{
  display:inline-block;font-size:13.5px;padding:6px 14px;border-radius:var(--r-tag);
  border:1px solid var(--border-soft);background:var(--card);color:var(--muted);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.tag-cloud a:hover{border-color:var(--celadon);color:var(--celadon);background:#fff}
.topic-links{list-style:none;margin:26px 0 0;padding:0}
.topic-links li{padding:13px 0;border-bottom:1px solid var(--border-soft);font-size:14.5px}
.topic-links li:first-child{border-top:1px solid var(--border-soft)}
.topic-links a{color:var(--ink);transition:color .2s ease}
.topic-links a:hover{color:var(--celadon)}

/* ---------- FAQ ---------- */
.faq{margin-top:30px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;
  gap:20px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-family:var(--serif);font-size:16.5px;font-weight:600;color:var(--text);
  padding:14px 0;transition:color .2s ease;
}
.faq-q:hover{color:var(--ink)}
.faq-icon{position:relative;width:14px;height:14px;flex:0 0 14px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:6px;width:14px;height:1.6px}
.faq-icon::after{left:6px;top:0;width:1.6px;height:14px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-item.is-open .faq-a{max-height:280px}
.faq-a p{font-size:15px;line-height:1.8;color:var(--muted);margin:0 0 18px;max-width:880px}

/* ---------- 订阅 ---------- */
.sub-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:36px;align-items:center}
.sub-form{display:flex;gap:12px}
.sub-form input{
  flex:1 1 auto;min-width:0;height:44px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--card);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.sub-form input::placeholder{color:var(--ph)}
.sub-form input:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 2px rgba(201,132,58,.45)}
.sub-form input.is-error{border-color:var(--danger)}
.privacy-note{font-size:13px;color:var(--muted);margin:0}
.form-ok{
  margin:16px 0 0;padding:12px 16px;border-radius:var(--r-btn);
  background:#EAF3F1;border:1px solid rgba(46,125,111,.4);
  color:var(--celadon);font-size:14px;
}
.form-err{margin:10px 0 0;color:var(--danger);font-size:12px}

/* ---------- 文章推荐 ---------- */
.post-list{list-style:none;margin:26px 0 0;padding:0;border-top:1px solid var(--line)}
.post-list li{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:16px 12px;margin:0 -12px;border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.post-list li:hover{background:var(--bg-3)}
.post-list a{font-size:15.5px;color:var(--text);transition:color .2s ease}
.post-list a:hover{color:var(--ink)}
.post-list time{font-family:var(--mono);font-size:13px;color:var(--ph);white-space:nowrap}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--ink-deep);color:#B9B3C2;padding:64px 0 30px;margin-top:auto}
.foot-grid{
  max-width:1200px;margin:0 auto;padding:0 40px;
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px;
}
.foot-brand .brand{padding:0 0 16px}
.foot-brand .brand-text{color:#FAF6F0}
.foot-brand .brand-mark{background:rgba(255,255,255,.1);color:#FAF6F0}
.foot-brand p{font-size:13.5px;line-height:1.85;color:#B9B3C2;margin:0}
.foot-col h3{font-family:var(--serif);font-size:15px;font-weight:600;color:#FAF6F0;margin-bottom:14px}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:13.5px;color:#B9B3C2;transition:color .2s ease}
.foot-col a:hover{color:#FAF6F0}
.foot-bottom{
  max-width:1200px;margin:48px auto 0;padding:22px 40px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#8E88A0;
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--side-w:240px}
  .container{padding:0 32px}
  .foot-grid,.foot-bottom{padding-left:32px;padding-right:32px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .main{margin-left:0}
  .topbar{display:flex}
  .toolbar{top:60px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .head-grid{grid-template-columns:1fr;gap:26px;align-items:start}
  .head-stats{border-left:0;border-top:1px solid var(--line);padding-top:20px}
  .head-stats li:first-child{padding-left:0}
  .pick-card{grid-template-columns:220px minmax(0,1fr)}
  .topic-grid{grid-template-columns:1fr;gap:44px}
  .sub-row{grid-template-columns:1fr;gap:20px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
}
@media (max-width:767px){
  .page-head h1{font-size:28px}
  h2{font-size:24px}
  .head-stats{flex-wrap:wrap;gap:18px 0}
  .head-stats li{padding:0 20px}
  .stat-strip{grid-template-columns:1fr 1fr}
  .stat-strip li{padding:0 18px}
  .stat-strip li:nth-child(3){padding-left:0;border-left:0}
  .stat-strip li:nth-child(4){padding-left:18px;border-left:1px solid var(--line)}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .foot-grid,.foot-bottom{padding-left:20px;padding-right:20px}
  .section{padding:48px 0}
  .page-head{padding:36px 0 32px}
  .page-head h1{font-size:25px}
  h2{font-size:22px}
  .card-grid{grid-template-columns:1fr}
  .pick-card{grid-template-columns:1fr}
  .pick-cover{border-right:0;border-bottom:1px solid var(--border-soft)}
  .pick-body{padding:20px}
  .sub-form{flex-direction:column}
  .sub-form .btn{width:100%}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .stat-strip{grid-template-columns:1fr;gap:0}
  .stat-strip li{padding:14px 0;border-left:0;border-bottom:1px solid var(--line)}
  .stat-strip li:nth-child(4){padding-left:0;border-left:0}
  .stat-strip li:last-child{border-bottom:0}
  .toolbar-inner{padding-top:10px;padding-bottom:10px}
  .post-list li{flex-direction:column;align-items:flex-start;gap:4px}
}