/* roulang page: index */
:root{
  --ink:#14201B; --ink-2:#2C3A33; --paper:#F7F4ED; --paper-2:#EFEAE0;
  --line:#DCD5C7; --clay:#C0562F; --clay-deep:#9C3F1F; --sage:#7C8B80;
  --white:#FFFFFF; --night:#101A15;
  --r-card:4px; --r-img:6px; --r-btn:2px; --r-input:3px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --shadow-hover:0 20px 40px -28px rgba(20,32,27,.35);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body.site-body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.85;letter-spacing:0;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
body.is-locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 56px}
.t-serif{font-family:var(--serif)}
.t-mono{font-family:var(--mono)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--clay);text-transform:uppercase}
.eyebrow-light{color:rgba(247,244,237,.7)}
.h2{font-family:var(--serif);font-weight:600;font-size:clamp(28px,3vw,40px);line-height:1.2;margin-top:10px}
.h3{font-family:var(--serif);font-weight:600;font-size:22px;line-height:1.45}
.lead{font-size:16.5px;line-height:1.85;color:var(--ink-2)}
.muted{color:var(--sage)}
.meta{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--sage)}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.clamp3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- 左侧 App Shell 导航 ---------- */
.side{
  position:fixed;top:0;left:0;bottom:0;width:264px;z-index:60;
  background:var(--ink);color:var(--paper);
  display:flex;flex-direction:column;overflow-y:auto;
  padding-bottom:18px;
}
.side-logo{height:96px;flex:0 0 96px;display:flex;align-items:center;gap:10px;padding:0 22px;border-bottom:1px solid rgba(247,244,237,.12)}
.logo-mark{
  width:28px;height:28px;flex:0 0 28px;display:grid;place-items:center;
  border:1px solid var(--clay);border-radius:2px;color:var(--clay);
  font-family:var(--serif);font-size:15px;font-weight:600;line-height:1;
}
.logo-word{font-family:var(--serif);font-size:18px;font-weight:600;white-space:nowrap;letter-spacing:.01em}
.side-sub{padding:12px 22px 0;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:rgba(124,139,128,.9)}
.side-nav{padding:16px 0 8px;display:flex;flex-direction:column}
.nav-item{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:10px;
  height:44px;padding:0 22px;font-size:15px;color:rgba(247,244,237,.76);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item::before{content:"";position:absolute;left:0;top:11px;bottom:11px;width:2px;background:transparent;transition:background .18s var(--ease)}
.nav-item:hover{background:rgba(247,244,237,.06);color:var(--paper)}
.nav-item.is-active{color:var(--paper)}
.nav-item.is-active::before{background:var(--clay)}
.nav-n{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:rgba(124,139,128,.95)}
.side-cta{
  margin:18px 18px 0;padding:18px 16px;border:1px solid rgba(247,244,237,.18);border-radius:var(--r-card);
  background:rgba(247,244,237,.06);
}
.side-cta p{font-size:13px;line-height:1.7;color:rgba(247,244,237,.82);margin-bottom:12px}
.side-cta .btn{width:100%;height:40px;font-size:14px;padding:0 12px}
.side-foot{margin-top:auto;padding:20px 22px 0;font-size:12px;line-height:1.9;color:rgba(247,244,237,.55)}
.side-foot a{display:block}
.side-foot a:hover{color:var(--clay)}

.topbar{display:none}
.drawer{position:fixed;inset:0;z-index:80;display:none}
.drawer.is-open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(20,32,27,.6)}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,380px);
  background:var(--ink);color:var(--paper);padding:22px;display:flex;flex-direction:column;
  animation:drawerIn .28s var(--ease);
}
@keyframes drawerIn{from{transform:translateX(24px);opacity:.6}to{transform:none;opacity:1}}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid rgba(247,244,237,.14)}
.drawer-nav{display:flex;flex-direction:column;padding:14px 0}
.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:56px;font-size:20px;font-family:var(--serif);color:rgba(247,244,237,.88);border-bottom:1px solid rgba(247,244,237,.08)}
.drawer-link:hover,.drawer-link.is-active{color:var(--clay)}
.drawer-foot{margin-top:auto;padding-top:20px}

/* ---------- 主内容区 ---------- */
.main{margin-left:264px;min-height:100vh;display:flex;flex-direction:column;position:relative}
.hero{position:relative;overflow:hidden;padding-top:56px}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(20,32,27,.04) 1px,transparent 1px);
  background-size:88px 100%;
}
.hero-grid{position:relative;display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;min-height:82vh;padding:24px 0 52px}
.hero-copy{grid-column:span 7}
.hero-title{
  font-family:var(--serif);font-weight:600;font-size:clamp(40px,5vw,72px);
  line-height:1.08;letter-spacing:-.02em;margin-top:20px;
}
.hero-title .u{position:relative;display:inline-block;white-space:nowrap}
.hero-title .u::after{content:"";position:absolute;left:0;right:0;bottom:.08em;height:2px;background:var(--clay)}
.hero-sub{margin-top:22px;font-size:19px;line-height:1.8;color:var(--ink-2);max-width:33em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-visual{grid-column:span 5;position:relative}
.hero-visual img{position:relative;z-index:1;width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r-img)}
.hero-visual::after{
  content:"";position:absolute;z-index:0;left:-16px;top:16px;right:16px;bottom:-16px;
  border:1px solid var(--line);border-radius:var(--r-img);
}
.hero-tag{
  position:absolute;z-index:2;left:14px;bottom:14px;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--paper);
  background:rgba(20,32,27,.62);padding:5px 9px;border-radius:2px;
}
.hero-trust{
  position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  border-top:1px solid var(--line);padding:30px 0 44px;
}
.trust-num{font-family:var(--serif);font-size:28px;line-height:1.2;font-weight:600}
.trust-desc{font-size:13px;color:var(--sage);margin-top:6px;line-height:1.7}

/* ---------- 按钮 / 标签 / 文字链 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 26px;border-radius:var(--r-btn);
  font-size:16px;font-weight:500;line-height:1;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--clay);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border:1px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:rgba(20,32,27,.06);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:42px;padding:0 18px;font-size:14.5px}
.btn:focus-visible{outline:2px solid var(--clay);outline-offset:2px}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--paper-2);color:var(--ink-2);font-size:12px;line-height:1;white-space:nowrap}
.tag-clay{background:rgba(192,86,47,.13);color:var(--clay-deep)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--clay-deep);
  border-bottom:1px solid currentColor;padding-bottom:1px;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.link-arrow:hover{color:var(--clay);transform:translateX(3px)}
.link-plain{color:var(--clay-deep);border-bottom:1px solid rgba(156,63,31,.4);transition:border-color .18s,color .18s}
.link-plain:hover{color:var(--clay);border-color:var(--clay)}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--paper-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head .h2{margin-bottom:0}

/* ---------- 卖点三连 ---------- */
.frow{
  display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;
  padding:32px 18px;min-height:120px;border-top:1px solid var(--line);
  transition:background .2s var(--ease);
}
.frow:last-child{border-bottom:1px solid var(--line)}
.frow:hover{background:var(--paper-2)}
.frow-num{grid-column:span 1;font-family:var(--mono);font-size:13px;letter-spacing:.18em;color:var(--clay)}
.frow-title{grid-column:span 3;font-family:var(--serif);font-size:22px;font-weight:600;line-height:1.4}
.frow-desc{grid-column:span 7;font-size:15.5px;color:var(--ink-2);line-height:1.8}
.frow-arrow{grid-column:span 1;display:flex;justify-content:flex-end;color:var(--sage);transition:transform .2s var(--ease),color .2s var(--ease)}
.frow:hover .frow-arrow{transform:translateX(4px);color:var(--clay)}

/* ---------- 场景演示 ---------- */
.scene{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center}
.scene-media{grid-column:span 6}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line)}
.scene-text{grid-column:span 5}
.scene-a .scene-text{grid-column:8 / span 5}
.scene-b .scene-text{grid-column:1 / span 5;position:relative;padding-left:26px}
.scene-b .scene-text::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:var(--line)}
.scene-b .scene-media{grid-column:7 / span 6}
.scene-quote{font-family:var(--serif);font-size:17px;line-height:1.75;color:var(--clay-deep);margin-top:18px}
.scene-block{background:var(--paper-2)}
.scene-block .scene{padding:88px 0}
.scene-block .scene + .scene{border-top:1px solid var(--line)}

/* ---------- 最新信息 / CMS ---------- */
.feat{
  display:grid;grid-template-columns:5fr 7fr;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.feat:hover{border-color:var(--sage);box-shadow:var(--shadow-hover)}
.feat-media{position:relative;overflow:hidden}
.feat-media img{width:100%;height:100%;min-height:260px;aspect-ratio:16/10;object-fit:cover}
.feat-body{padding:32px;display:flex;flex-direction:column;gap:14px}
.feat-title{font-family:var(--serif);font-size:26px;font-weight:600;line-height:1.35}
.feat-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:8px;border-top:1px solid var(--line)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}
.news-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;display:flex;flex-direction:column;gap:12px;
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{border-color:var(--sage);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.news-title{font-family:var(--serif);font-size:18px;font-weight:600;line-height:1.5}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--line)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);padding:56px 24px;text-align:center;
  background:rgba(255,255,255,.5);
}
.empty-state svg{margin:0 auto 14px;color:var(--sage)}
.empty-state p{font-size:15px;color:var(--ink-2);margin-bottom:12px}

/* ---------- 社会认同 ---------- */
.social{background:var(--night);color:var(--paper);padding:96px 0}
.social-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:40px;align-items:center}
.quote-col{grid-column:span 7}
.quote-text{font-family:var(--serif);font-size:clamp(24px,2.4vw,34px);line-height:1.55;font-weight:500}
.quote-text .qm{color:var(--clay)}
.quote-by{margin-top:20px;font-size:13px;color:rgba(247,244,237,.62);letter-spacing:.02em}
.stats{grid-column:span 5;display:grid;grid-template-columns:repeat(3,1fr)}
.stat{padding:0 18px;border-left:1px solid rgba(247,244,237,.18)}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{font-family:var(--serif);font-size:40px;line-height:1.1;font-weight:600}
.stat-desc{font-size:13px;line-height:1.7;color:rgba(247,244,237,.6);margin-top:8px}
.source-strip{margin-top:56px;padding-top:26px;border-top:1px solid rgba(247,244,237,.16);display:flex;flex-wrap:wrap;gap:12px 36px}
.source-strip span{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:rgba(247,244,237,.42)}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-side{position:sticky;top:48px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;text-align:left;min-height:56px;padding:10px 0;font-size:17px;color:var(--ink);
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--clay-deep)}
.faq-q:focus-visible{outline:2px solid var(--clay);outline-offset:2px}
.faq-icon{flex:0 0 auto;color:var(--sage);transition:transform .24s var(--ease),color .24s var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--clay)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{font-size:15px;line-height:1.85;color:var(--ink-2);padding:0 40px 20px 0}

/* ---------- 底部 CTA / 表单 ---------- */
.cta-band{background:var(--paper-2);padding:96px 0}
.cta-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:start}
.form-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);padding:32px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px}
.field input,.field textarea{
  width:100%;background:var(--white);border:1px solid var(--line);border-radius:var(--r-input);
  height:48px;padding:0 14px;font-size:15px;color:var(--ink);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:118px;padding:12px 14px;line-height:1.75;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--sage)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--clay);box-shadow:0 0 0 2px rgba(192,86,47,.18)}
.field-error{border-color:var(--clay-deep) !important}
.err-msg{display:none;font-size:13px;color:var(--clay-deep);margin-top:6px}
.err-msg.is-on{display:block}
.form-ok{
  display:none;margin-top:16px;padding:12px 14px;background:var(--paper-2);
  border-radius:var(--r-input);font-size:14px;color:var(--ink-2);
}
.form-ok.is-on{display:block}
.form-note{font-size:12.5px;color:var(--sage);line-height:1.7;margin-top:12px}
.contact-line{display:flex;flex-direction:column;gap:6px;margin-top:28px;font-size:14.5px;color:var(--ink-2)}
.contact-line strong{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--sage);font-weight:500}

/* ---------- 页脚 ---------- */
.foot{background:var(--night);color:var(--paper);padding:72px 0 0;margin-top:auto}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .logo-mark{width:26px;height:26px;flex:0 0 26px;font-size:14px}
.foot-brand .logo-word{font-size:17px}
.foot-desc{font-size:13px;line-height:1.9;color:rgba(247,244,237,.58)}
.foot-h{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:rgba(247,244,237,.45);margin-bottom:16px}
.foot-list{display:flex;flex-direction:column;gap:10px}
.foot-list a{font-size:14px;color:rgba(247,244,237,.8);transition:color .18s var(--ease)}
.foot-list a:hover{color:var(--clay)}
.foot-bottom{
  border-top:1px solid rgba(247,244,237,.14);padding:22px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(247,244,237,.5);
}
.foot-bottom a:hover{color:var(--clay)}

/* ---------- 固定转化条 ---------- */
.sticky-bar{
  position:fixed;right:0;left:264px;bottom:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 32px;background:rgba(247,244,237,.96);border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform .3s var(--ease);
}
.sticky-bar.is-visible{transform:translateY(0)}
.sticky-note{font-size:13.5px;color:var(--ink-2);line-height:1.5}
.sticky-note b{font-family:var(--serif);font-size:15px;font-weight:600;color:var(--ink)}

/* ---------- 进场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .sticky-bar{transition:none}
}

/* ---------- 响应式：1024 - 1279 ---------- */
@media (min-width:1024px) and (max-width:1279px){
  .side{width:88px}
  .main{margin-left:88px}
  .sticky-bar{left:88px}
  .side-logo{justify-content:center;padding:0}
  .logo-word,.side-sub,.side-cta,.side-foot{display:none}
  .nav-item{justify-content:center;padding:0}
  .nav-i{display:none}
  .nav-n{font-size:12px;color:rgba(247,244,237,.8)}
  .nav-item.is-active .nav-n{color:var(--clay)}
}

/* ---------- 响应式：< 1024 ---------- */
@media (max-width:1023px){
  .side{display:none}
  .main{margin-left:0;padding-top:64px}
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
    align-items:center;justify-content:space-between;gap:12px;
    padding:0 18px;background:var(--ink);color:var(--paper);
  }
  .topbar-logo{display:flex;align-items:center;gap:8px;font-family:var(--serif);font-size:16px;font-weight:600;white-space:nowrap}
  .burger{width:44px;height:44px;display:grid;place-items:center;color:var(--paper)}
  .container{padding:0 24px}
  .sticky-bar{left:0;padding:10px 18px calc(10px + env(safe-area-inset-bottom));transform:translateY(0);min-height:64px}
  .hero{padding-top:24px}
  .hero-grid{grid-template-columns:1fr;min-height:0;padding:16px 0 40px;gap:40px}
  .hero-copy,.hero-visual{grid-column:auto}
  .hero-visual::after{left:-12px;top:12px;right:12px;bottom:-12px}
  .hero-trust{grid-template-columns:1fr;gap:18px;padding:24px 0 32px}
  .section{padding:56px 0}
  .section-head{margin-bottom:26px;align-items:flex-start;flex-direction:column;gap:14px}
  .frow{grid-template-columns:34px 1fr;gap:6px 14px;padding:22px 0;min-height:0}
  .frow-num{grid-column:1;grid-row:1}
  .frow-title{grid-column:2;grid-row:1;font-size:19px}
  .frow-desc{grid-column:2;grid-row:2;font-size:15px}
  .frow-arrow{display:none}
  .scene{grid-template-columns:1fr;gap:24px;padding:48px 0 !important}
  .scene-a .scene-text,.scene-b .scene-text,.scene-media,.scene-b .scene-media{grid-column:auto}
  .scene-b .scene-text{padding-left:20px}
  .feat{grid-template-columns:1fr}
  .feat-media img{min-height:200px;aspect-ratio:16/10}
  .feat-body{padding:24px}
  .feat-title{font-size:21px}
  .news-grid{grid-template-columns:1fr;gap:16px}
  .social{padding:56px 0}
  .social-grid{grid-template-columns:1fr;gap:32px}
  .quote-col,.stats{grid-column:auto}
  .stats{grid-template-columns:1fr;gap:20px}
  .stat{border-left:0;padding:0;border-top:1px solid rgba(247,244,237,.18);padding-top:16px}
  .stat:first-child{border-top:0;padding-top:0}
  .source-strip{margin-top:36px;gap:10px 24px}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-side{position:static}
  .cta-band{padding:56px 0}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .form-card{padding:24px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .foot{padding:56px 0 0}
  .foot-bottom{padding-bottom:96px}
}

@media (min-width:640px) and (max-width:1023px){
  .news-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:639px){
  .container{padding:0 18px}
  .hero-title{font-size:clamp(32px,8.6vw,44px)}
  .hero-sub{font-size:16.5px}
  .btn{width:100%;height:50px}
  .hero-actions{flex-direction:column}
  .foot-grid{grid-template-columns:1fr}
  .sticky-note{font-size:12.5px}
  .sticky-bar .btn{width:auto;height:40px;padding:0 16px;font-size:14px}
  .source-strip span{font-size:11px;letter-spacing:.1em}
}

/* roulang page: article */
:root{
  --ink:#14201B;
  --ink-2:#2C3A33;
  --paper:#F7F4ED;
  --paper-2:#EFEAE0;
  --line:#DCD5C7;
  --clay:#C0562F;
  --clay-deep:#9C3F1F;
  --sage:#7C8B80;
  --white:#FFFFFF;
  --night:#101A15;
  --nav-w:264px;
  --radius-card:4px;
  --radius-img:6px;
  --radius-btn:2px;
  --shadow-hover:0 20px 40px -28px rgba(20,32,27,.35);
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.88;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  padding-bottom:72px;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,transform .2s ease;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--clay);outline-offset:2px;}
::selection{background:rgba(192,86,47,.18);}

/* ============ 左侧 App Shell ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--ink);
  color:var(--paper);
  display:flex;
  flex-direction:column;
  z-index:70;
  border-right:1px solid rgba(220,213,199,.08);
}
.side-head{
  height:96px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 24px;
  border-bottom:1px solid rgba(220,213,199,.10);
  flex:0 0 auto;
}
.logo-mark{
  width:34px;height:34px;
  flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(247,244,237,.45);
  color:var(--paper);
  font-family:var(--font-serif);
  font-size:17px;
  line-height:1;
  border-radius:2px;
  transition:border-color .2s ease,color .2s ease;
}
.logo-word{
  font-family:var(--font-serif);
  font-size:17px;
  letter-spacing:.01em;
  color:var(--paper);
  white-space:nowrap;
}
.logo-sub{
  display:block;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.22em;
  color:var(--sage);
  margin-top:2px;
}
.side-nav{
  padding:20px 0 8px;
  flex:1 1 auto;
  overflow-y:auto;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  height:44px;
  padding:0 20px;
  font-size:15px;
  color:rgba(247,244,237,.74);
  border-left:2px solid transparent;
}
.nav-item:hover{background:rgba(247,244,237,.06);color:var(--paper);}
.nav-item.is-active{color:var(--paper);border-left-color:var(--clay);background:rgba(247,244,237,.04);}
.nav-i{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.nav-n{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--sage);flex:0 0 auto;}
.nav-item.is-active .nav-n{color:var(--clay);}
.side-foot{
  flex:0 0 auto;
  padding:16px;
  border-top:1px solid rgba(220,213,199,.10);
}
.side-cta{
  background:rgba(247,244,237,.08);
  border:1px solid rgba(220,213,199,.20);
  border-radius:var(--radius-card);
  padding:16px;
}
.side-cta p{
  margin:0 0 12px;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(247,244,237,.78);
}
.side-cta .btn{width:100%;justify-content:center;}
.side-meta{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:rgba(124,139,128,.9);
  line-height:1.9;
}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  background:var(--ink);
  color:var(--paper);
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  z-index:80;
}
.topbar .logo-mark{width:30px;height:30px;flex:0 0 30px;font-size:15px;}
.topbar-brand{display:flex;align-items:center;gap:10px;}
.burger{
  width:44px;height:44px;
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:transparent;border:1px solid rgba(247,244,237,.28);border-radius:2px;
}
.burger span{display:block;width:18px;height:1.5px;background:var(--paper);transition:transform .22s ease,opacity .22s ease;}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
.drawer{
  position:fixed;
  inset:0;
  background:var(--ink);
  color:var(--paper);
  z-index:75;
  display:flex;
  flex-direction:column;
  padding:84px 24px 28px;
  transform:translateY(-8px);
  opacity:0;
  pointer-events:none;
  transition:opacity .24s ease,transform .24s ease;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.drawer .nav-item{height:56px;font-size:20px;padding:0 4px;border-left:2px solid transparent;}
.drawer .nav-item.is-active{border-left-color:var(--clay);background:transparent;}
.drawer .nav-n{font-size:12px;}
.drawer-cta{margin-top:28px;padding-top:24px;border-top:1px solid rgba(220,213,199,.16);}
.drawer-cta p{margin:0 0 14px;font-size:13.5px;color:rgba(247,244,237,.7);}

/* ============ 主区域 ============ */
.main{
  margin-left:var(--nav-w);
  min-height:100vh;
}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:56px;
  padding-right:56px;
}

/* 阅读进度 */
.progress-wrap{
  position:fixed;
  top:0;
  left:var(--nav-w);
  right:0;
  height:2px;
  background:rgba(220,213,199,.35);
  z-index:60;
}
.progress-bar{
  height:100%;
  width:0;
  background:var(--clay);
  transition:width .1s linear;
}

/* 面包屑 */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-2);
  padding:34px 0 0;
}
.crumb a{color:var(--ink-2);border-bottom:1px solid transparent;}
.crumb a:hover{color:var(--clay-deep);border-bottom-color:var(--clay);}
.crumb .sep{color:var(--sage);}
.crumb .cur{color:var(--sage);}

/* 文章头 */
.article-head{padding:26px 0 0;max-width:900px;}
.kicker{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--clay-deep);
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
}
.kicker::before{content:"";display:block;width:22px;height:1px;background:var(--clay);}
.article-h1{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(32px,4vw,48px);
  line-height:1.22;
  letter-spacing:-.01em;
  margin:0 0 22px;
  color:var(--ink);
}
.head-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  padding:16px 0 26px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--sage);
}
.tag-pill{
  display:inline-flex;align-items:center;
  padding:4px 12px;
  background:var(--paper-2);
  color:var(--ink-2);
  border-radius:999px;
  font-size:12px;
  letter-spacing:.04em;
  font-family:var(--font-sans);
}
.tag-pill.clay{color:var(--clay-deep);background:rgba(192,86,47,.10);}
.head-meta .dot{width:3px;height:3px;background:var(--line);border-radius:50%;display:inline-block;}

/* 文章布局 */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 220px;
  gap:64px;
  align-items:start;
  padding:40px 0 0;
}
.article-body{
  max-width:760px;
  font-size:17.5px;
  line-height:1.9;
  color:var(--ink-2);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.6em;}
.article-body h2{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:24px;
  line-height:1.45;
  color:var(--ink);
  margin:2.2em 0 .9em;
  padding-left:14px;
  border-left:3px solid var(--clay);
  scroll-margin-top:96px;
}
.article-body h3{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:20px;
  line-height:1.5;
  color:var(--ink);
  margin:1.9em 0 .7em;
  scroll-margin-top:96px;
}
.article-body h4{
  font-family:var(--font-serif);
  font-size:17.5px;
  color:var(--ink);
  margin:1.6em 0 .6em;
}
.article-body a{color:var(--clay-deep);border-bottom:1px solid rgba(156,63,31,.35);}
.article-body a:hover{color:var(--clay);border-bottom-color:var(--clay);}
.article-body ul,.article-body ol{padding-left:1.35em;margin:0 0 1.6em;}
.article-body li{margin:.45em 0;}
.article-body ul li{list-style:none;position:relative;padding-left:18px;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.78em;
  width:6px;height:6px;background:var(--clay);border-radius:1px;
}
.article-body ol li::marker{color:var(--clay-deep);font-family:var(--font-mono);font-size:.9em;}
.article-body blockquote{
  margin:2em 0;
  padding:24px 26px;
  background:var(--paper-2);
  border-left:3px solid var(--clay);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  color:var(--ink);
  font-family:var(--font-serif);
  font-size:18px;
  line-height:1.8;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-img);margin:1.8em 0 .8em;width:100%;height:auto;}
.article-body figure{margin:1.8em 0;}
.article-body figcaption{
  text-align:center;
  font-size:13px;
  color:var(--sage);
  margin-top:-.4em;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.8em 0;
  font-size:15.5px;
  border:1px solid var(--line);
}
.article-body th,.article-body td{
  border:1px solid var(--line);
  padding:11px 14px;
  text-align:left;
}
.article-body th{background:var(--paper-2);color:var(--ink);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body code{
  font-family:var(--font-mono);
  font-size:.88em;
  background:var(--paper-2);
  padding:2px 6px;
  border-radius:3px;
  color:var(--clay-deep);
}
.article-body pre{
  background:var(--ink);
  color:var(--paper);
  padding:20px 22px;
  border-radius:var(--radius-card);
  overflow-x:auto;
  font-size:14px;
  line-height:1.75;
  margin:1.8em 0;
}
.article-body pre code{background:transparent;color:inherit;padding:0;}

/* 侧栏目录 */
.toc{
  position:sticky;
  top:96px;
  border-left:1px solid var(--line);
  padding-left:22px;
}
.toc-h{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--sage);
  margin:0 0 14px;
}
.toc-list{list-style:none;margin:0;padding:0;}
.toc-list li{margin:0 0 2px;}
.toc-list a{
  display:block;
  font-size:13.5px;
  line-height:1.6;
  padding:6px 0 6px 12px;
  color:var(--ink-2);
  border-left:2px solid transparent;
  margin-left:-24px;
  padding-left:24px;
}
.toc-list a:hover{color:var(--clay-deep);}
.toc-list a.is-active{color:var(--clay-deep);border-left-color:var(--clay);font-weight:600;}
.toc-mobile{display:none;}

/* 文末 */
.article-end{
  margin:56px 0 0;
  padding-top:32px;
  border-top:1px solid var(--line);
  max-width:760px;
}
.end-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;}
.end-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.end-note{font-size:13px;color:var(--sage);margin:0;}
.share-btn{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:var(--white);
  font-size:13.5px;
  color:var(--ink-2);
}
.share-btn:hover{border-color:var(--sage);color:var(--ink);}

/* 继续查看 */
.more-block{padding:64px 0 0;}
.section-eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--clay-deep);
  margin:0 0 10px;
}
.section-h2{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(24px,2.4vw,32px);
  line-height:1.3;
  margin:0 0 26px;
  color:var(--ink);
}
.more-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.more-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  min-height:150px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.more-card:hover{border-color:var(--sage);transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.more-card .mc-num{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--clay);}
.more-card .mc-title{font-family:var(--font-serif);font-size:18px;line-height:1.45;color:var(--ink);}
.more-card .mc-desc{font-size:13.5px;line-height:1.75;color:var(--ink-2);margin:0;}
.more-card .mc-arrow{margin-top:auto;font-size:13px;color:var(--clay-deep);display:inline-flex;align-items:center;gap:6px;}
.more-card:hover .mc-arrow svg{transform:translateX(4px);}
.mc-arrow svg{transition:transform .2s ease;}

/* 无内容态 */
.empty-box{
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  padding:64px 32px;
  text-align:center;
  background:rgba(239,234,224,.4);
}
.empty-box .ei{
  width:44px;height:44px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:50%;
  color:var(--sage);
}
.empty-box h2{font-family:var(--font-serif);font-size:22px;margin:0 0 10px;color:var(--ink);}
.empty-box p{margin:0 0 20px;font-size:14.5px;color:var(--ink-2);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  font-size:15.5px;
  line-height:1;
  border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--ink);color:var(--paper);}
.btn-primary:hover{background:var(--clay);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:rgba(20,32,27,.06);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

/* 中段窄 CTA */
.mid-cta{
  margin:72px 0 0;
  background:var(--paper-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.mid-cta-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:40px 0;
}
.mid-cta h2{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(22px,2.4vw,30px);
  margin:0 0 8px;
  color:var(--ink);
}
.mid-cta p{margin:0;font-size:14.5px;color:var(--ink-2);max-width:52ch;}

/* 固定转化条 */
.sticky-bar{
  position:fixed;
  left:var(--nav-w);
  right:0;
  bottom:0;
  z-index:65;
  background:rgba(247,244,237,.96);
  border-top:1px solid var(--line);
  transform:translateY(110%);
  transition:transform .26s ease;
}
.sticky-bar.is-show{transform:translateY(0);}
.sticky-inner{
  max-width:1240px;
  margin:0 auto;
  padding:10px 56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
}
.sticky-txt{font-size:13.5px;color:var(--ink-2);}
.sticky-txt strong{font-family:var(--font-serif);font-size:15px;color:var(--ink);display:block;line-height:1.5;}

/* 页脚 */
.foot{
  background:var(--night);
  color:var(--paper);
  margin-top:88px;
  padding:72px 0 28px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.foot-brand .logo-mark{border-color:rgba(247,244,237,.4);}
.foot-brand .logo-word{font-size:17px;}
.foot-desc{font-size:13px;line-height:1.9;color:rgba(247,244,237,.62);margin:0;}
.foot-h{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  color:var(--sage);
  margin:0 0 16px;
}
.foot-list{display:flex;flex-direction:column;gap:10px;}
.foot-list a{font-size:13.5px;color:rgba(247,244,237,.72);}
.foot-list a:hover{color:var(--clay);}
.foot-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid rgba(220,213,199,.14);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:12px;
  color:rgba(247,244,237,.5);
  font-family:var(--font-mono);
  letter-spacing:.04em;
}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,1,.36,1),transform .48s cubic-bezier(.22,1,.36,1);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 断点 ============ */
@media (max-width:1279px){
  :root{--nav-w:88px;}
  .side-head{padding:0;justify-content:center;height:88px;}
  .side-head .logo-word,.logo-sub{display:none;}
  .nav-item{justify-content:center;padding:0 4px;font-size:0;}
  .nav-item .nav-i{display:none;}
  .nav-n{font-size:11.5px;color:rgba(247,244,237,.72);}
  .side-foot{padding:12px 8px;}
  .side-cta{padding:10px 6px;text-align:center;}
  .side-cta p{display:none;}
  .side-cta .btn{padding:0;font-size:0;height:40px;}
  .side-cta .btn::after{content:"→";font-size:15px;}
  .side-meta{display:none;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .toc{display:none;}
  .container{padding-left:40px;padding-right:40px;}
  .sticky-inner{padding:10px 40px;}
}
@media (max-width:1023px){
  :root{--nav-w:0px;}
  .sidebar{display:none;}
  .topbar{display:flex;}
  .main{margin-left:0;padding-top:64px;}
  .progress-wrap{left:0;top:64px;}
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .article-body{max-width:none;}
  .toc-mobile{display:block;margin:28px 0 0;}
  .toc-mobile summary{
    list-style:none;
    cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 18px;
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    background:var(--white);
    font-size:14px;
    color:var(--ink);
  }
  .toc-mobile summary::-webkit-details-marker{display:none;}
  .toc-mobile summary::after{content:"+";font-family:var(--font-mono);color:var(--clay);font-size:16px;}
  .toc-mobile[open] summary::after{content:"–";}
  .toc-mobile .toc-list{margin-top:10px;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--white);padding:8px 18px;}
  .toc-mobile .toc-list a{margin-left:0;padding-left:12px;border-left-width:2px;}
  .more-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .container{padding-left:24px;padding-right:24px;}
  .sticky-inner{padding:10px 24px;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .more-grid{grid-template-columns:1fr;}
  .crash{display:none;}
  .article-h1{font-size:clamp(26px,7.4vw,34px);}
  .article-body{font-size:16.5px;}
  .article-body h2{font-size:21px;}
  .article-body h3{font-size:18.5px;}
  .head-meta{gap:10px;font-size:11px;}
  .mid-cta-inner{padding:32px 0;flex-direction:column;align-items:flex-start;}
  .mid-cta .btn{width:100%;}
  .foot-grid{grid-template-columns:1fr;}
  .foot{padding:56px 0 24px;margin-top:64px;}
  .sticky-inner{gap:10px;}
  .sticky-txt{font-size:12.5px;}
  .sticky-txt strong{font-size:13.5px;}
  .sticky-bar .btn{height:40px;padding:0 16px;font-size:14px;flex:0 0 auto;}
  .empty-box{padding:44px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
    --ink:#14201B;
    --ink-2:#2C3A33;
    --paper:#F7F4ED;
    --paper-2:#EFEAE0;
    --line:#DCD5C7;
    --clay:#C0562F;
    --clay-deep:#9C3F1F;
    --sage:#7C8B80;
    --white:#FFFFFF;
    --night:#101A15;
    --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --sans:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    --mono:ui-monospace,"SFMono-Regular",Menlo,monospace;
    --r-card:4px;
    --r-img:6px;
    --r-btn:2px;
    --r-input:3px;
    --sh-hover:0 20px 40px -28px rgba(20,32,27,.35);
    --ease:cubic-bezier(.22,1,.36,1);
    --nav-w:264px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--sans);
    font-size:17px;
    line-height:1.88;
    padding-bottom:76px;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease)}
  button{font-family:inherit;cursor:pointer}
  ::selection{background:rgba(192,86,47,.18);color:var(--ink)}
  :focus-visible{outline:2px solid var(--clay);outline-offset:2px;border-radius:2px}

  .skip{
    position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);
    padding:12px 18px;z-index:200;border-radius:0 0 2px 0;font-size:14px;
  }
  .skip:focus{left:0}

  .container{
    width:100%;
    max-width:1240px;
    margin:0 auto;
    padding-left:64px;
    padding-right:64px;
  }

  /* ---------- 左侧 App Shell 导航 ---------- */
  .sidebar{
    position:fixed;
    left:0;top:0;bottom:0;
    width:var(--nav-w);
    background:var(--ink);
    color:var(--paper);
    display:flex;
    flex-direction:column;
    padding:0 18px 22px;
    border-right:1px solid rgba(247,244,237,.08);
    z-index:60;
    overflow-y:auto;
  }
  .side-logo{
    height:96px;
    display:flex;
    align-items:center;
    gap:10px;
    padding:0 6px;
    flex:0 0 auto;
  }
  .logo-mark{
    width:28px;height:28px;flex:0 0 auto;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--clay);
    color:var(--clay);
    font-family:var(--serif);
    font-size:15px;
    line-height:1;
    border-radius:2px;
  }
  .logo-word{
    font-family:var(--serif);
    font-size:18px;
    line-height:1.2;
    letter-spacing:.01em;
    color:var(--paper);
    white-space:nowrap;
  }
  .side-sub{
    font-family:var(--mono);
    font-size:10px;
    letter-spacing:.2em;
    color:rgba(247,244,237,.42);
    padding:0 6px 22px;
    text-transform:uppercase;
  }
  .side-nav{display:flex;flex-direction:column;gap:2px;margin-top:4px}

  .nav-item{
    position:relative;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    min-height:44px;
    padding:0 10px 0 14px;
    font-size:15px;
    line-height:1.4;
    color:rgba(247,244,237,.76);
    border-radius:2px;
    transition:background .22s var(--ease),color .22s var(--ease);
  }
  .nav-item::before{
    content:"";
    position:absolute;
    left:0;top:9px;bottom:9px;
    width:2px;
    background:transparent;
    transition:background .22s var(--ease);
  }
  .nav-item:hover{background:rgba(247,244,237,.06);color:#FFFFFF}
  .nav-item.is-active{background:rgba(247,244,237,.05);color:#FFFFFF}
  .nav-item:hover::before,
  .nav-item.is-active::before{background:var(--clay)}
  .nav-n{
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.12em;
    color:rgba(247,244,237,.34);
    flex:0 0 auto;
  }
  .nav-item.is-active .nav-n{color:var(--clay)}

  .side-cta{
    margin-top:auto;
    background:rgba(247,244,237,.08);
    border:1px solid rgba(247,244,237,.16);
    border-radius:var(--r-card);
    padding:16px;
    margin-bottom:18px;
  }
  .side-cta-h{
    font-family:var(--serif);
    font-size:15px;
    line-height:1.5;
    color:var(--paper);
    margin:0 0 8px;
  }
  .side-cta-p{
    font-size:12px;
    line-height:1.7;
    color:rgba(247,244,237,.6);
    margin:0 0 14px;
  }
  .btn-side{
    display:flex;align-items:center;justify-content:center;
    width:100%;height:40px;
    background:var(--paper);color:var(--ink);
    font-size:13px;border-radius:var(--r-btn);border:1px solid transparent;
    transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
  }
  .btn-side:hover{background:var(--clay);color:#FFFFFF;transform:translateY(-1px)}
  .btn-side:active{transform:translateY(0)}

  .side-foot{
    border-top:1px solid rgba(247,244,237,.12);
    padding-top:14px;
    font-size:11px;
    line-height:1.9;
    color:rgba(247,244,237,.42);
  }
  .side-foot a{color:rgba(247,244,237,.6)}
  .side-foot a:hover{color:var(--clay)}

  /* ---------- 移动端顶栏 & 抽屉 ---------- */
  .topbar{
    display:none;
    position:fixed;left:0;right:0;top:0;height:64px;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    align-items:center;justify-content:space-between;
    padding:0 20px;
    z-index:70;
  }
  .topbar .logo-word{color:var(--ink);font-size:17px}
  .topbar .logo-mark{width:26px;height:26px;font-size:14px}
  .burger{
    width:44px;height:44px;
    display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid var(--line);border-radius:2px;
    color:var(--ink);
  }
  .burger:hover{border-color:var(--ink)}
  .burger span{display:block;width:18px;height:1.5px;background:currentColor;position:relative}
  .burger span::before,.burger span::after{
    content:"";position:absolute;left:0;width:18px;height:1.5px;background:currentColor;
  }
  .burger span::before{top:-6px}
  .burger span::after{top:6px}

  .drawer{
    position:fixed;inset:0;
    background:var(--ink);
    color:var(--paper);
    z-index:90;
    transform:translateX(-102%);
    transition:transform .32s var(--ease);
    display:flex;
    flex-direction:column;
    padding:20px 24px 32px;
    overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{
    display:flex;align-items:center;justify-content:space-between;
    padding-bottom:20px;border-bottom:1px solid rgba(247,244,237,.14);
  }
  .drawer-close{
    width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid rgba(247,244,237,.28);color:var(--paper);
    border-radius:2px;font-size:20px;line-height:1;
  }
  .drawer-close:hover{border-color:var(--clay);color:var(--clay)}
  .drawer-nav{display:flex;flex-direction:column;margin-top:16px}
  .drawer-nav a{
    display:flex;align-items:center;justify-content:space-between;
    min-height:56px;font-size:20px;font-family:var(--serif);
    color:rgba(247,244,237,.86);
    border-bottom:1px solid rgba(247,244,237,.1);
  }
  .drawer-nav a:hover{color:var(--clay)}
  .drawer-nav .nav-n{color:rgba(247,244,237,.36)}
  .drawer-cta{margin-top:auto;padding-top:28px}
  .drawer-cta .btn-side{height:52px;font-size:15px}
  .body-lock{overflow:hidden}

  /* ---------- 主内容区 ---------- */
  .main{margin-left:var(--nav-w);min-height:60vh}

  /* ---------- 面包屑 ---------- */
  .crumb{
    display:flex;align-items:center;flex-wrap:wrap;gap:8px;
    font-size:13px;color:var(--sage);
    padding-top:40px;
  }
  .crumb a{color:var(--ink-2)}
  .crumb a:hover{color:var(--clay-deep)}
  .crumb .sep{color:var(--line)}
  .crumb .cur{color:var(--sage)}

  /* ---------- 分类 Hero ---------- */
  .cat-hero{padding-bottom:72px;border-bottom:1px solid var(--line)}
  .hero-grid{
    display:grid;
    grid-template-columns:repeat(12,minmax(0,1fr));
    gap:24px;
    align-items:start;
    padding-top:36px;
  }
  .hero-copy{grid-column:1 / 9}
  .hero-index{grid-column:10 / 13}

  .eyebrow{
    display:inline-block;
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.18em;
    text-transform:uppercase;
    color:var(--clay-deep);
    margin:0 0 18px;
  }
  .cat-h1{
    font-family:var(--serif);
    font-weight:600;
    font-size:clamp(36px,4.4vw,56px);
    line-height:1.12;
    letter-spacing:-.02em;
    margin:0 0 22px;
    max-width:16em;
  }
  .cat-h1 em{
    font-style:normal;
    box-shadow:inset 0 -0.14em 0 rgba(192,86,47,.28);
  }
  .hero-lead{
    font-size:18px;
    line-height:1.85;
    color:var(--ink-2);
    margin:0;
    max-width:34em;
  }
  .hero-lead + .hero-lead{margin-top:14px}

  .index-card{
    border:1px solid var(--line);
    background:var(--white);
    border-radius:var(--r-card);
    padding:22px 22px 12px;
  }
  .index-h{
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.18em;
    color:var(--sage);
    margin:0 0 12px;
    text-transform:uppercase;
  }
  .idx-list{display:flex;flex-direction:column;margin:0;padding:0;list-style:none}
  .idx-link{
    display:flex;align-items:baseline;gap:12px;
    padding:12px 0;
    border-bottom:1px solid var(--line);
    font-size:15px;line-height:1.5;color:var(--ink-2);
  }
  .idx-link .n{
    font-family:var(--mono);font-size:11px;letter-spacing:.1em;
    color:var(--clay);flex:0 0 auto;
  }
  .idx-link .t{border-bottom:1px solid transparent;transition:border-color .2s var(--ease)}
  .idx-link:hover{color:var(--clay-deep)}
  .idx-link:hover .t{border-bottom-color:var(--clay)}
  .idx-list li:last-child .idx-link{border-bottom:0}

  /* ---------- 横向图文块 ---------- */
  .block-section{padding:64px 0;border-bottom:1px solid var(--line)}
  .block-section.alt{background:var(--paper-2)}
  .blk{
    display:grid;
    grid-template-columns:repeat(12,minmax(0,1fr));
    gap:24px;
    align-items:center;
  }
  .blk-fig{grid-column:1 / 5;margin:0;position:relative}
  .blk-fig img{
    width:100%;
    aspect-ratio:4 / 3;
    object-fit:cover;
    border-radius:var(--r-img);
    border:1px solid var(--line);
  }
  .blk-fig .fig-mark{
    position:absolute;left:12px;bottom:12px;
    font-family:var(--mono);font-size:11px;letter-spacing:.14em;
    background:rgba(247,244,237,.94);
    color:var(--ink-2);
    padding:4px 8px;
    border-radius:2px;
  }
  .blk-body{grid-column:6 / 13}
  .blk-num{
    font-family:var(--mono);
    font-size:12px;letter-spacing:.18em;
    color:var(--clay);
    display:block;
    margin-bottom:12px;
  }
  .blk-h3{
    font-family:var(--serif);
    font-weight:600;
    font-size:clamp(22px,2.2vw,28px);
    line-height:1.35;
    margin:0 0 16px;
    letter-spacing:-.01em;
  }
  .blk-p{
    font-size:16px;
    line-height:1.9;
    color:var(--ink-2);
    margin:0 0 18px;
    max-width:36em;
  }
  .point-list{
    list-style:none;margin:0 0 22px;padding:0;
    display:flex;flex-direction:column;gap:10px;
  }
  .point-list li{
    position:relative;
    padding-left:20px;
    font-size:15px;
    line-height:1.8;
    color:var(--ink-2);
  }
  .point-list li::before{
    content:"";
    position:absolute;left:0;top:.86em;
    width:8px;height:8px;
    background:var(--clay);
    border-radius:1px;
  }

  .textlink{
    display:inline-flex;align-items:center;gap:8px;
    font-size:15px;
    color:var(--ink);
    border-bottom:1px solid var(--clay);
    padding-bottom:3px;
    transition:color .2s var(--ease),transform .2s var(--ease);
  }
  .textlink svg{transition:transform .2s var(--ease)}
  .textlink:hover{color:var(--clay-deep)}
  .textlink:hover svg{transform:translateX(4px)}

  /* ---------- 数据条 ---------- */
  .stats-band{background:var(--night);color:var(--paper);padding:56px 0}
  .stats-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:24px;
  }
  .stat{
    padding-left:20px;
    border-left:1px solid rgba(247,244,237,.18);
  }
  .stat:first-child{border-left:0;padding-left:0}
  .stat-num{
    font-family:var(--serif);
    font-size:clamp(30px,3.4vw,40px);
    line-height:1.1;
    color:var(--paper);
    margin:0 0 6px;
  }
  .stat-num span{font-size:.6em;color:var(--clay);margin-left:2px}
  .stat-desc{font-size:13px;line-height:1.7;color:rgba(247,244,237,.62);margin:0}

  /* ---------- FAQ ---------- */
  .faq-section{padding:80px 0}
  .faq-grid{
    display:grid;
    grid-template-columns:repeat(12,minmax(0,1fr));
    gap:24px;
    align-items:start;
  }
  .faq-aside{grid-column:1 / 5}
  .faq-main{grid-column:6 / 13}
  .sec-h2{
    font-family:var(--serif);
    font-weight:600;
    font-size:clamp(26px,3vw,36px);
    line-height:1.24;
    letter-spacing:-.01em;
    margin:0 0 16px;
  }
  .sec-p{font-size:15px;line-height:1.9;color:var(--ink-2);margin:0;max-width:28em}

  .faq-item{border-top:1px solid var(--line)}
  .faq-item:last-child{border-bottom:1px solid var(--line)}
  .faq-q{
    width:100%;
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    min-height:64px;
    padding:14px 0;
    background:transparent;
    border:0;
    text-align:left;
    font-family:var(--sans);
    font-size:17px;
    line-height:1.6;
    color:var(--ink);
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--clay-deep)}
  .faq-ico{
    flex:0 0 auto;
    width:20px;height:20px;position:relative;
    transition:transform .24s var(--ease);
  }
  .faq-ico::before,.faq-ico::after{
    content:"";position:absolute;background:var(--clay);
  }
  .faq-ico::before{left:0;top:9px;width:20px;height:1.5px}
  .faq-ico::after{left:9px;top:0;width:1.5px;height:20px}
  .faq-item.open .faq-ico{transform:rotate(45deg)}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .34s var(--ease);
  }
  .faq-a p{
    margin:0;
    padding:0 40px 22px 0;
    font-size:15px;
    line-height:1.9;
    color:var(--ink-2);
  }

  /* ---------- CTA 通栏 ---------- */
  .cta-band{
    position:relative;
    background:var(--night);
    color:var(--paper);
    overflow:hidden;
  }
  .cta-band::before{
    content:"";
    position:absolute;inset:0;
    background:url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    opacity:.15;
  }
  .cta-inner{
    position:relative;
    z-index:2;
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:40px;
    align-items:center;
    padding-top:64px;
    padding-bottom:64px;
  }
  .cta-inner .eyebrow{color:rgba(192,86,47,.95)}
  .cta-h2{
    font-family:var(--serif);
    font-weight:600;
    font-size:clamp(24px,2.8vw,34px);
    line-height:1.3;
    margin:0 0 14px;
    color:var(--paper);
  }
  .cta-p{
    margin:0;
    font-size:15px;
    line-height:1.9;
    color:rgba(247,244,237,.7);
    max-width:34em;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:10px;
    height:52px;
    padding:0 28px;
    font-size:15px;
    line-height:1;
    border-radius:var(--r-btn);
    border:1px solid transparent;
    transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
    white-space:nowrap;
  }
  .btn-primary{background:var(--ink);color:var(--paper)}
  .btn-primary:hover{background:var(--clay);color:#FFFFFF;transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0)}
  .btn-light{background:var(--paper);color:var(--ink)}
  .btn-light:hover{background:var(--clay);color:#FFFFFF;transform:translateY(-1px)}
  .btn-light:active{transform:translateY(0)}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
  .btn-ghost:hover{background:rgba(20,32,27,.06)}
  .btn svg{transition:transform .2s var(--ease)}
  .btn:hover svg{transform:translateX(4px)}

  /* ---------- 页脚 ---------- */
  .foot{
    margin-left:var(--nav-w);
    background:var(--night);
    color:var(--paper);
  }
  .foot-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr;
    gap:40px;
    padding:64px 0 48px;
  }
  .foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .foot-brand .logo-word{font-size:17px}
  .foot-desc{
    font-size:13px;
    line-height:1.9;
    color:rgba(247,244,237,.56);
    margin:0;
    max-width:26em;
  }
  .foot-h{
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.18em;
    color:rgba(247,244,237,.4);
    margin:0 0 16px;
  }
  .foot-list{display:flex;flex-direction:column;gap:10px}
  .foot-list a{
    font-size:14px;
    color:rgba(247,244,237,.78);
  }
  .foot-list a:hover{color:var(--clay)}
  .foot-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
    border-top:1px solid rgba(247,244,237,.12);
    padding:22px 0 30px;
    font-size:12px;
    color:rgba(247,244,237,.46);
  }

  /* ---------- 固定转化条 ---------- */
  .fixbar{
    position:fixed;
    left:var(--nav-w);right:0;bottom:0;
    z-index:40;
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    background:rgba(247,244,237,.96);
    border-top:1px solid var(--line);
    padding:10px 28px;
    transform:translateY(110%);
    transition:transform .3s var(--ease);
  }
  .fixbar.show{transform:translateY(0)}
  .fixbar-txt{
    font-size:14px;
    line-height:1.5;
    color:var(--ink-2);
    margin:0;
    min-width:0;
  }
  .fixbar-txt strong{font-family:var(--serif);font-weight:600;color:var(--ink)}
  .fixbar .btn{height:44px;padding:0 22px;font-size:14px}

  /* ---------- 动效 ---------- */
  .js .reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .48s var(--ease),transform .48s var(--ease);
    transition-delay:var(--d,0ms);
  }
  .js .reveal.in{opacity:1;transform:none}

  /* ---------- 断点：1024–1279 窄栏 ---------- */
  @media (min-width:1024px) and (max-width:1279px){
    :root{--nav-w:88px}
    .sidebar{padding:0 10px 18px;align-items:stretch}
    .side-logo{justify-content:center;padding:0}
    .logo-word,.side-sub,.nav-i,.side-cta{display:none}
    .nav-item{justify-content:center;padding:0}
    .nav-item::before{left:-10px}
    .nav-item[data-tip]:hover::after{
      content:attr(data-tip);
      position:absolute;
      left:calc(100% + 14px);
      top:50%;
      transform:translateY(-50%);
      background:var(--ink);
      color:var(--paper);
      font-size:13px;
      line-height:1;
      padding:8px 12px;
      border-radius:2px;
      white-space:nowrap;
      box-shadow:var(--sh-hover);
      z-index:80;
    }
    .side-foot{display:none}
    .container{padding-left:40px;padding-right:40px}
    .fixbar{padding:10px 20px}
  }

  /* ---------- 断点：<1024 移动端 ---------- */
  @media (max-width:1023px){
    :root{--nav-w:0px}
    body{font-size:16px;padding-bottom:72px}
    .sidebar{display:none}
    .topbar{display:flex}
    .main{margin-left:0;padding-top:64px}
    .foot{margin-left:0}
    .container{padding-left:24px;padding-right:24px}

    .crumb{padding-top:24px}
    .cat-hero{padding-bottom:48px}
    .hero-grid{grid-template-columns:1fr;gap:32px;padding-top:24px}
    .hero-copy,.hero-index{grid-column:auto}
    .hero-lead{font-size:17px}

    .block-section{padding:48px 0}
    .blk{grid-template-columns:1fr;gap:24px}
    .blk-fig,.blk-body{grid-column:auto}
    .blk-p{font-size:15.5px}

    .stats-grid{grid-template-columns:1fr;gap:28px}
    .stat{border-left:0;padding-left:0;border-top:1px solid rgba(247,244,237,.16);padding-top:20px}
    .stat:first-child{border-top:0;padding-top:0}

    .faq-section{padding:56px 0}
    .faq-grid{grid-template-columns:1fr;gap:28px}
    .faq-aside,.faq-main{grid-column:auto}
    .faq-a p{padding-right:0}

    .cta-inner{grid-template-columns:1fr;gap:24px;padding-top:48px;padding-bottom:48px}
    .cta-inner .btn{width:100%}

    .foot-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 36px}
    .foot-bottom{padding:20px 0 26px;font-size:12px}

    .fixbar{
      left:0;
      padding:8px 16px calc(8px + env(safe-area-inset-bottom));
      transform:translateY(0);
      gap:12px;
    }
    .fixbar-txt{font-size:13px;line-height:1.4}
    .fixbar .btn{height:44px;padding:0 16px;font-size:13px}
  }

  @media (max-width:639px){
    .foot-grid{grid-template-columns:1fr;gap:28px}
    .cat-h1{font-size:34px}
    .index-card{padding:18px 18px 8px}
    .btn{height:48px;padding:0 20px;font-size:15px}
    .fixbar-txt strong{display:block}
  }

  @media (min-width:1536px){
    .container{padding-left:72px;padding-right:72px}
  }

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{
      animation-duration:.001ms !important;
      transition-duration:.001ms !important;
    }
    .js .reveal{opacity:1;transform:none}
  }

/* roulang page: category2 */
:root{
  --ink:#14201B; --ink-2:#2C3A33; --paper:#F7F4ED; --paper-2:#EFEAE0;
  --line:#DCD5C7; --clay:#C0562F; --clay-deep:#9C3F1F; --sage:#7C8B80;
  --white:#FFFFFF; --night:#101A15;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,monospace;
  --sw:264px;
  --r-card:4px; --r-btn:2px; --r-img:6px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--sans); font-size:16px; line-height:1.85; letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
button{font-family:inherit; cursor:pointer}
h1,h2,h3,h4{font-family:var(--serif); font-weight:600; margin:0}
p{margin:0}
ul,ol{margin:0; padding:0; list-style:none}
:focus-visible{outline:2px solid var(--clay); outline-offset:2px}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed; top:0; left:0; bottom:0; width:var(--sw);
  background:var(--ink); color:var(--paper);
  display:flex; flex-direction:column; z-index:60;
}
.side-top{
  height:96px; padding:0 24px; display:flex; flex-direction:column; justify-content:center;
  border-bottom:1px solid rgba(247,244,237,.10);
}
.brand-row{display:flex; align-items:center; gap:10px}
.logo-mark{
  width:28px; height:28px; flex:0 0 28px; display:grid; place-items:center;
  border:1px solid var(--clay); color:var(--clay);
  font-family:var(--serif); font-size:15px; line-height:1; border-radius:2px;
}
.logo-word{font-family:var(--serif); font-size:18px; letter-spacing:.01em; color:var(--paper); white-space:nowrap}
.side-sub{
  font-family:var(--mono); font-size:8px; letter-spacing:.2em;
  color:var(--sage); margin-top:6px; padding-left:38px;
}
.side-nav{padding:20px 0 8px; display:flex; flex-direction:column; flex:1 1 auto}
.nav-item{
  position:relative; display:flex; align-items:center; justify-content:space-between; gap:8px;
  height:44px; padding:0 24px; color:rgba(247,244,237,.70); font-size:15px;
  transition:background .2s ease, color .2s ease;
}
.nav-item::before{
  content:""; position:absolute; left:0; top:8px; bottom:8px; width:2px;
  background:transparent; transition:background .2s ease;
}
.nav-item:hover{background:rgba(247,244,237,.06); color:var(--paper)}
.nav-item.is-active{color:var(--paper)}
.nav-item.is-active::before{background:var(--clay)}
.nav-i{white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.nav-n{font-family:var(--mono); font-size:11px; letter-spacing:.12em; color:var(--sage)}
.nav-item.is-active .nav-n{color:var(--clay)}
.side-foot{padding:0 20px 24px; margin-top:auto}
.side-card{
  background:rgba(247,244,237,.08); border:1px solid rgba(247,244,237,.16);
  border-radius:var(--r-card); padding:16px; margin-bottom:18px;
}
.side-card p{font-size:13px; line-height:1.7; color:rgba(247,244,237,.82)}
.side-card .side-card-sub{color:rgba(247,244,237,.58); font-size:12px; margin-top:4px; margin-bottom:12px}
.side-contact{font-family:var(--mono); font-size:10px; letter-spacing:.1em; color:rgba(247,244,237,.42); line-height:2}

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:52px; padding:0 26px; border-radius:var(--r-btn); border:1px solid transparent;
  font-size:15px; font-weight:500; letter-spacing:.02em;
  transition:background .22s ease, color .22s ease, transform .22s ease, border-color .22s ease;
}
.btn-primary{background:var(--ink); color:var(--paper)}
.btn-primary:hover{background:var(--clay); color:#fff; transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-clay{background:var(--clay); color:#fff}
.btn-clay:hover{background:var(--clay-deep); transform:translateY(-1px)}
.btn-clay:active{transform:translateY(0)}
.btn-ghost{background:transparent; color:var(--ink); border-color:var(--ink)}
.btn-ghost:hover{background:rgba(20,32,27,.06)}
.btn-block{width:100%; height:42px; font-size:14px; padding:0 14px}
.btn-sm{height:44px; padding:0 20px; font-size:14px}

/* ---------- 页面框架 ---------- */
.page{margin-left:var(--sw); min-height:100vh; display:flex; flex-direction:column}
.container{width:100%; max-width:1240px; margin:0 auto; padding:0 56px}
.topbar{display:none}

/* ---------- 面包屑 / Hero ---------- */
.crumb{
  display:flex; align-items:center; gap:8px; flex-wrap:wrap;
  font-size:13px; color:var(--sage); padding-top:44px;
}
.crumb a{color:var(--sage); transition:color .2s}
.crumb a:hover{color:var(--clay-deep)}
.crumb .sep{color:var(--line)}
.crumb .cur{color:var(--sage)}

.hero{padding:28px 0 0}
.hero-grid{
  display:grid; grid-template-columns:minmax(0,1fr) 320px; gap:48px;
  align-items:end; padding:24px 0 48px;
}
.eyebrow{
  font-family:var(--mono); font-size:12px; letter-spacing:.18em;
  color:var(--clay); text-transform:uppercase; margin-bottom:18px;
}
h1{
  font-size:clamp(36px,4.4vw,56px); line-height:1.1; letter-spacing:-.02em;
  max-width:16em;
}
.hero-lead{
  font-size:18px; line-height:1.85; color:var(--ink-2);
  max-width:38em; margin-top:22px;
}
.hero-tags{display:flex; flex-wrap:wrap; gap:10px; padding-bottom:6px}
.chip{
  display:inline-flex; align-items:center; height:32px; padding:0 14px;
  background:var(--paper-2); color:var(--ink-2); border:1px solid var(--line);
  border-radius:999px; font-size:12px; letter-spacing:.04em;
}
.chip-clay{background:rgba(192,86,47,.10); border-color:rgba(192,86,47,.28); color:var(--clay-deep)}
.tag-note{
  font-size:12px; color:var(--sage); line-height:1.7; margin-top:6px;
  flex-basis:100%;
}
.hairline{height:1px; background:var(--line); width:100%}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--paper-2)}
.sec-head{max-width:760px; margin-bottom:48px}
h2{font-size:clamp(28px,3vw,40px); line-height:1.2; letter-spacing:-.01em}
.sec-sub{font-size:16px; color:var(--ink-2); margin-top:16px; line-height:1.85}
.sec-head-row{display:flex; align-items:flex-end; justify-content:space-between; gap:32px; flex-wrap:wrap}

/* ---------- 非对称卡片网格 ---------- */
.asym{display:grid; grid-template-columns:minmax(0,7fr) minmax(0,5fr); gap:24px; align-items:start}
.asym-col{display:flex; flex-direction:column; gap:24px}

.card-hi{
  background:var(--white); border:1px solid var(--line); border-radius:var(--r-card);
  overflow:hidden; transition:border-color .22s ease, transform .22s ease, box-shadow .22s ease;
}
.card-hi:hover{border-color:var(--sage); transform:translateY(-2px); box-shadow:0 20px 40px -28px rgba(20,32,27,.35)}
.card-hi .thumb{aspect-ratio:16/10; overflow:hidden; background:var(--paper-2)}
.card-hi .thumb img{width:100%; height:100%; object-fit:cover}
.card-hi .body{padding:28px}
.card-hi h3{font-size:23px; line-height:1.45; margin-bottom:12px}
.card-hi p{font-size:15px; color:var(--ink-2); line-height:1.85}
.meta-row{
  display:flex; align-items:center; gap:12px; flex-wrap:wrap;
  margin-top:20px; font-family:var(--mono); font-size:12px; letter-spacing:.06em;
  color:var(--sage);
}
.badge-clay{
  display:inline-flex; align-items:center; height:24px; padding:0 10px;
  background:rgba(192,86,47,.10); color:var(--clay-deep);
  border-radius:999px; font-size:12px; letter-spacing:.02em;
  font-family:var(--sans);
}

.card-lo{
  background:var(--white); border:1px solid var(--line); border-radius:var(--r-card);
  padding:24px 24px 22px; transition:border-color .22s ease, transform .22s ease, background .22s ease;
}
.card-lo:hover{border-color:var(--sage); transform:translateY(-2px); background:#fff}
.card-lo .lo-idx{
  font-family:var(--mono); font-size:11px; letter-spacing:.18em; color:var(--clay);
  display:block; margin-bottom:10px;
}
.card-lo h3{font-size:18px; line-height:1.5; margin-bottom:10px}
.card-lo p{font-size:14px; color:var(--ink-2); line-height:1.8}
.card-lo .meta-row{margin-top:14px}

/* ---------- 时间线 ---------- */
.timeline{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:24px; margin-top:56px}
.tl-node{position:relative; padding-top:28px; border-top:1px solid var(--line)}
.tl-node::before{
  content:""; position:absolute; top:-5px; left:0; width:10px; height:10px;
  border-radius:50%; background:var(--clay);
}
.tl-idx{font-family:var(--mono); font-size:12px; letter-spacing:.18em; color:var(--clay); display:block; margin-bottom:10px}
.tl-node h3{font-size:19px; line-height:1.45; margin-bottom:10px}
.tl-node p{font-size:14px; color:var(--ink-2); line-height:1.8}
.tl-time{
  display:inline-block; margin-top:14px; font-family:var(--mono); font-size:12px;
  color:var(--sage); letter-spacing:.06em;
}

/* ---------- 引用块 ---------- */
.quote-block{
  background:var(--paper-2); border-left:3px solid var(--clay);
  border-radius:0 var(--r-card) var(--r-card) 0; padding:40px 44px;
}
.quote-block p{
  font-family:var(--serif); font-size:clamp(20px,2.2vw,26px); line-height:1.65;
  color:var(--ink);
}
.quote-block .quote-from{
  font-family:var(--mono); font-size:12px; letter-spacing:.12em;
  color:var(--sage); margin-top:18px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%; display:flex; align-items:center; justify-content:space-between; gap:24px;
  min-height:56px; padding:16px 0; background:transparent; border:0;
  text-align:left; font-size:17px; color:var(--ink); font-weight:500;
  font-family:var(--sans); transition:color .2s ease;
}
.faq-q:hover{color:var(--clay-deep)}
.faq-ico{
  flex:0 0 20px; width:20px; height:20px; position:relative;
  transition:transform .24s ease;
}
.faq-ico::before,.faq-ico::after{
  content:""; position:absolute; background:var(--clay); border-radius:1px;
}
.faq-ico::before{left:0; top:9px; width:20px; height:2px}
.faq-ico::after{left:9px; top:0; width:2px; height:20px}
.faq-q[aria-expanded="true"] .faq-ico{transform:rotate(45deg)}
.faq-a{max-height:0; overflow:hidden; transition:max-height .3s ease}
.faq-a p{font-size:15px; line-height:1.9; color:var(--ink-2); padding:0 0 22px; max-width:44em}

/* ---------- 双链接 ---------- */
.dual{
  display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px;
  margin-top:56px;
}
.dual a{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:26px 28px; background:var(--white); border:1px solid var(--line);
  border-radius:var(--r-card); transition:border-color .22s ease, transform .22s ease;
}
.dual a:hover{border-color:var(--clay); transform:translateY(-2px)}
.dual .dl-t{font-family:var(--serif); font-size:19px; display:block; margin-bottom:6px}
.dual .dl-s{font-size:13px; color:var(--sage)}
.dual .dl-a{color:var(--clay); font-size:20px; transition:transform .22s ease}
.dual a:hover .dl-a{transform:translateX(4px)}

/* ---------- 页脚 ---------- */
.foot{background:var(--night); color:var(--paper); padding:80px 0 0; margin-top:auto}
.foot-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:48px}
.foot-brand{display:flex; align-items:center; gap:10px; margin-bottom:18px}
.foot-brand .logo-word{font-size:18px}
.foot-desc{font-size:13px; line-height:1.9; color:rgba(247,244,237,.62)}
.foot-h{
  font-family:var(--mono); font-size:11px; letter-spacing:.18em;
  color:var(--sage); margin-bottom:18px;
}
.foot-list{display:flex; flex-direction:column; gap:12px}
.foot-list a{font-size:14px; color:rgba(247,244,237,.74); transition:color .2s ease}
.foot-list a:hover{color:var(--clay)}
.foot-bottom{
  margin-top:64px; border-top:1px solid rgba(247,244,237,.14);
  padding:24px 0 32px; display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  font-family:var(--mono); font-size:12px; letter-spacing:.04em; color:rgba(247,244,237,.46);
}

/* ---------- 固定转化条 ---------- */
.sticky-cta{
  position:fixed; left:var(--sw); right:0; bottom:0; z-index:40;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding:12px 56px; background:rgba(247,244,237,.96);
  border-top:1px solid var(--line); transform:translateY(110%);
  transition:transform .3s ease; backdrop-filter:none;
}
.sticky-cta.show{transform:translateY(0)}
.sticky-cta .sc-t{font-size:14px; color:var(--ink-2)}
.sticky-cta .sc-t b{color:var(--ink); font-weight:600}

/* ---------- 移动端顶部栏 / 抽屉 ---------- */
.topbar{
  position:fixed; top:0; left:0; right:0; height:64px; z-index:70;
  background:rgba(247,244,237,.97); border-bottom:1px solid var(--line);
  align-items:center; justify-content:space-between; padding:0 20px;
}
.topbar .brand-row{gap:8px}
.topbar .logo-word{font-size:16px; color:var(--ink)}
.burger{
  width:44px; height:44px; display:flex; flex-direction:column; align-items:center;
  justify-content:center; gap:5px; background:transparent; border:1px solid var(--line);
  border-radius:2px;
}
.burger span{display:block; width:18px; height:1.5px; background:var(--ink); transition:transform .24s ease, opacity .24s ease}
body.drawer-open .burger span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
body.drawer-open .burger span:nth-child(2){opacity:0}
body.drawer-open .burger span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.mask{
  position:fixed; inset:0; background:rgba(20,32,27,.6); opacity:0; pointer-events:none;
  transition:opacity .26s ease; z-index:80;
}
body.drawer-open .mask{opacity:1; pointer-events:auto}
.drawer{
  position:fixed; top:0; right:0; bottom:0; width:min(360px,86vw); z-index:90;
  background:var(--ink); color:var(--paper); padding:24px 24px 32px;
  transform:translateX(100%); transition:transform .3s cubic-bezier(.22,1,.36,1);
  display:flex; flex-direction:column;
}
body.drawer-open .drawer{transform:translateX(0)}
.drawer-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:24px}
.drawer-close{
  width:44px; height:44px; background:transparent; border:1px solid rgba(247,244,237,.24);
  color:var(--paper); border-radius:2px; font-size:18px; line-height:1;
}
.drawer-nav{display:flex; flex-direction:column}
.drawer-nav a{
  display:flex; align-items:center; justify-content:space-between;
  font-size:20px; line-height:56px; height:56px; color:rgba(247,244,237,.82);
  border-bottom:1px solid rgba(247,244,237,.10);
}
.drawer-nav a.is-active{color:#fff}
.drawer-nav a.is-active .d-n{color:var(--clay)}
.d-n{font-family:var(--mono); font-size:12px; color:var(--sage); letter-spacing:.14em}
.drawer-foot{margin-top:auto; padding-top:24px}
.drawer-foot p{font-size:13px; color:rgba(247,244,237,.55); margin-bottom:14px; line-height:1.8}

/* ---------- 进入动画 ---------- */
.reveal{opacity:0; transform:translateY(12px); transition:opacity .48s cubic-bezier(.22,1,.36,1), transform .48s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1; transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sw:88px}
  .side-top{padding:0 16px; align-items:center}
  .logo-word,.side-sub{display:none}
  .nav-item{justify-content:center; padding:0}
  .nav-i{display:none}
  .nav-n{font-size:12px}
  .side-foot{padding:0 12px 20px}
  .side-card{display:none}
  .side-contact{display:none}
  .container{padding:0 40px}
  .sticky-cta{left:var(--sw); padding:12px 40px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .page{margin-left:0; padding-top:64px; padding-bottom:76px}
  .container{padding:0 24px}
  .sticky-cta{left:0; right:0; padding:10px 20px; transform:translateY(0)}
  .sticky-cta .sc-t{font-size:12px; line-height:1.5}
  .sticky-cta .btn{height:44px; padding:0 18px; font-size:14px; flex:0 0 auto}
  .hero-grid{grid-template-columns:1fr; gap:28px; align-items:start; padding-bottom:36px}
  .asym{grid-template-columns:1fr}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr)); gap:32px 24px}
  .dual{grid-template-columns:1fr; margin-top:40px}
  .foot-grid{grid-template-columns:1fr 1fr; gap:40px}
  .section{padding:64px 0}
  .quote-block{padding:28px 24px}
}
@media (max-width:640px){
  body{font-size:16px}
  h1{font-size:clamp(30px,8vw,38px); max-width:none}
  .hero-lead{font-size:16px; margin-top:16px}
  .section{padding:56px 0}
  .sec-head{margin-bottom:32px}
  .timeline{grid-template-columns:1fr; gap:28px}
  .card-hi .body{padding:22px}
  .card-lo{padding:20px}
  .foot-grid{grid-template-columns:1fr; gap:32px}
  .foot{padding-top:56px}
  .foot-bottom{flex-direction:column; gap:8px; margin-top:40px}
  .quote-block p{font-size:19px}
  .sticky-cta .sc-t{max-width:52%}
  .crumb{padding-top:24px; font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important; animation-duration:.01ms !important}
  .reveal{opacity:1; transform:none}
}