/* roulang page: index */
:root{
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --ink-900:#0F1218;
  --ink-800:#171B23;
  --paper:#F7F4EE;
  --paper-2:#EFEAE0;
  --white:#FFFFFF;
  --line:#E3DCCD;
  --line-dark:rgba(244,239,228,.14);
  --text:#191C22;
  --muted:#5B6169;
  --inverse:#F4EFE4;
  --inverse-muted:#A9AFB8;
  --star:#C87A34;
  --star-deep:#B06A29;
  --jin:#33605C;
  --r-card:4px;
  --r-btn:4px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-1:0 1px 2px rgba(15,18,24,.04);
  --shadow-2:0 10px 28px rgba(15,18,24,.08);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--font-sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--font-serif);margin:0;letter-spacing:.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--star);outline-offset:2px}
::selection{background:rgba(200,122,52,.22)}

/* ---------- 骨架 ---------- */
.shell{padding-left:0}
@media(min-width:1024px){.shell{padding-left:228px}}
@media(min-width:1280px){.shell{padding-left:260px}}
.page{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.page{padding-left:40px;padding-right:40px}}
@media(min-width:1280px){.page{padding-left:56px;padding-right:56px}}
.section{padding-top:56px;padding-bottom:56px}
@media(min-width:768px){.section{padding-top:76px;padding-bottom:76px}}
@media(min-width:1024px){.section{padding-top:100px;padding-bottom:100px}}
.section-alt{background:var(--paper-2)}
.hairline{border-top:1px solid var(--line)}

/* ---------- 左栏导航 ---------- */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:228px;z-index:40;
  background:var(--ink-900);color:var(--inverse);
  display:none;flex-direction:column;padding:30px 22px 24px;
  border-right:1px solid rgba(244,239,228,.08);
}
@media(min-width:1024px){.sidenav{display:flex}}
@media(min-width:1280px){.sidenav{width:260px;padding:34px 26px 26px}}
.brand{display:block;margin-bottom:36px}
.brand-mark{
  display:block;font-family:var(--font-serif);font-size:26px;font-weight:700;
  letter-spacing:.18em;color:var(--inverse);line-height:1.2;
}
@media(min-width:1280px){.brand-mark{font-size:29px}}
.brand-sub{
  display:block;margin-top:8px;font-size:12px;line-height:1.6;
  color:var(--inverse-muted);letter-spacing:.04em;
}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:11px 0 11px 14px;font-size:15px;color:var(--inverse-muted);
  transition:color .24s var(--ease);
}
.nav-item::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:2px;
  background:var(--star);transform:scaleY(0);transform-origin:top;
  transition:transform .24s var(--ease);
}
.nav-item::after{
  content:"";position:absolute;left:14px;right:0;bottom:8px;height:1px;
  background:currentColor;opacity:0;transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-item:hover{color:var(--inverse)}
.nav-item:hover::after{opacity:.5;transform:scaleX(1)}
.nav-item.is-active{color:var(--inverse);font-weight:600}
.nav-item.is-active::before{transform:scaleY(1)}
.nav-item.is-active::after{opacity:0}
.nav-num{
  font-family:var(--font-serif);font-size:12px;color:var(--star);
  letter-spacing:.06em;min-width:18px;
}
.nav-item.is-active .nav-num{font-weight:700}
.nav-divider{height:1px;background:rgba(244,239,228,.14);margin:26px 0 22px}
.nav-foot{
  margin-top:auto;padding-top:22px;border-top:1px solid rgba(244,239,228,.14);
  font-size:12px;line-height:1.75;color:rgba(169,175,184,.85);
}
.nav-contact{display:block;margin-bottom:14px;font-size:12px;color:rgba(169,175,184,.85)}
.nav-contact:hover{color:var(--inverse)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .24s var(--ease),color .24s var(--ease),
             border-color .24s var(--ease),transform .24s var(--ease);
}
.btn-primary{background:var(--star);color:#FFF8EF}
.btn-primary:hover{background:var(--star-deep);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;border-color:var(--line);color:var(--text)}
.btn-outline:hover{border-color:var(--star);color:var(--star)}
.btn-ghost-light{background:transparent;border-color:rgba(244,239,228,.22);color:var(--inverse)}
.btn-ghost-light:hover{border-color:var(--star);color:var(--star)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;
  color:var(--text);font-weight:500;position:relative;padding-bottom:2px;
}
.text-link::after{
  content:"";position:absolute;left:0;right:18px;bottom:0;height:1px;
  background:var(--star);transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease);
}
.text-link i{font-style:normal;transition:transform .26s var(--ease);color:var(--star)}
.text-link:hover::after{transform:scaleX(1)}
.text-link:hover i{transform:translateX(2px)}
.text-link.on-dark{color:var(--inverse)}

/* ---------- 通用标签与标题 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--muted);margin-bottom:14px;
}
.eyebrow .dot{
  width:6px;height:6px;border-radius:50%;background:var(--star);
  box-shadow:0 0 0 3px rgba(200,122,52,.16);
}
.h2{font-size:25px;line-height:1.32;font-weight:700}
@media(min-width:768px){.h2{font-size:32px}}
@media(min-width:1024px){.h2{font-size:38px}}
.h3{font-family:var(--font-sans);font-size:20px;font-weight:600;line-height:1.45}
.lead{font-size:16px;line-height:1.9;color:var(--muted)}
@media(min-width:768px){.lead{font-size:17px}}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(51,96,92,.12);color:var(--jin);font-size:13px;line-height:1;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 11px;border-radius:999px;
  background:rgba(51,96,92,.12);color:var(--jin);font-size:12.5px;
  line-height:1;white-space:nowrap;
}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  flex-wrap:wrap;margin-bottom:36px;
}
@media(min-width:768px){.sec-head{margin-bottom:48px}}

/* ---------- 移动顶栏与抽屉 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;height:64px;display:flex;align-items:center;
  justify-content:space-between;padding:0 20px;background:var(--ink-900);
  color:var(--inverse);border-bottom:1px solid rgba(244,239,228,.12);
}
@media(min-width:1024px){.topbar{display:none}}
.topbar-brand{display:flex;align-items:baseline;gap:10px;min-width:0}
.topbar-brand span{
  font-family:var(--font-serif);font-size:19px;font-weight:700;letter-spacing:.14em;
}
.topbar-brand em{
  font-style:normal;font-size:11px;color:var(--inverse-muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.menu-btn{
  width:42px;height:42px;border:1px solid rgba(244,239,228,.2);border-radius:4px;
  background:transparent;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:5px;cursor:pointer;flex:none;
  transition:border-color .24s var(--ease);
}
.menu-btn:hover{border-color:var(--star)}
.menu-btn span{display:block;width:18px;height:1.5px;background:var(--inverse)}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:84%;max-width:340px;z-index:70;
  background:var(--ink-800);color:var(--inverse);padding:26px 24px;
  display:flex;flex-direction:column;transform:translateX(-100%);
  transition:transform .28s var(--ease);
}
.drawer.open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;z-index:65;background:rgba(15,18,24,.62);
  opacity:0;pointer-events:none;transition:opacity .28s var(--ease);
}
.drawer-mask.open{opacity:1;pointer-events:auto}
@media(min-width:1024px){.drawer,.drawer-mask{display:none}}
.drawer-close{
  align-self:flex-end;width:40px;height:40px;border-radius:4px;
  border:1px solid rgba(244,239,228,.2);background:transparent;color:var(--inverse);
  font-size:20px;line-height:1;cursor:pointer;transition:border-color .24s var(--ease);
}
.drawer-close:hover{border-color:var(--star);color:var(--star)}
.drawer-nav{display:flex;flex-direction:column;margin-top:26px}
.drawer-nav a{
  display:flex;align-items:center;gap:12px;padding:16px 0;
  font-size:21px;font-family:var(--font-serif);color:var(--inverse);
  border-bottom:1px solid rgba(244,239,228,.12);
}
.drawer-nav a .nav-num{font-size:13px}
.drawer-foot{margin-top:auto;padding-top:24px}
body.no-scroll{overflow:hidden}

/* ---------- Hero ---------- */
.hero{padding-top:44px;padding-bottom:0}
@media(min-width:1024px){.hero{padding-top:60px}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.04fr .96fr;gap:56px}}
.hero-title{
  font-size:33px;line-height:1.26;font-weight:700;color:var(--text);
}
@media(min-width:640px){.hero-title{font-size:42px}}
@media(min-width:1024px){.hero-title{font-size:56px;line-height:1.15}}
.hero-title .line2{display:block;color:#3B4149;font-weight:600;margin-top:6px}
@media(min-width:1024px){.hero-title .line2{margin-top:10px}}
.hero-lead{margin-top:22px;font-size:16px;line-height:1.9;color:var(--muted);max-width:520px}
@media(min-width:768px){.hero-lead{font-size:17.5px}}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:30px}
@media(max-width:519px){
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 calc(50% - 6px)}
  .hero-actions .text-link{flex:1 1 100%}
}
.hero-figure{position:relative;border-radius:var(--r-card);overflow:hidden;background:linear-gradient(150deg,#1A1F28 0%,#0F1218 70%);}
.hero-figure img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
@media(min-width:1024px){.hero-figure img{aspect-ratio:5/6}}
.hero-figure::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 100% at 100% 0%,rgba(15,18,24,.42) 0%,rgba(15,18,24,0) 62%);
}
.hero-points{display:grid;grid-template-columns:1fr;margin-top:40px;border-top:1px solid var(--line)}
@media(min-width:768px){.hero-points{grid-template-columns:repeat(3,1fr);margin-top:56px}}
.hero-points li{
  display:flex;align-items:center;gap:12px;
  padding:16px 0;border-bottom:1px solid var(--line);
  font-size:14px;color:var(--text);
}
@media(min-width:768px){
  .hero-points li{border-bottom:0;border-right:1px solid var(--line);padding:22px 26px 22px 0}
  .hero-points li:last-child{border-right:0}
  .hero-points li + li{padding-left:26px}
}
.hero-points li span{
  font-family:var(--font-serif);font-size:13px;color:var(--star);letter-spacing:.08em;
}

/* ---------- 痛点列表 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:1024px){.split{grid-template-columns:0.9fr 1.1fr;gap:64px}}
.pain-list{border-top:1px solid var(--line)}
.pain-list li{
  display:grid;grid-template-columns:52px 1fr;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
@media(min-width:768px){.pain-list li{grid-template-columns:72px 1fr;gap:24px;padding:26px 0}}
.pain-list .num{
  font-family:var(--font-serif);font-size:26px;line-height:1.2;
  color:rgba(200,122,52,.9);font-weight:600;
}
@media(min-width:768px){.pain-list .num{font-size:32px}}
.pain-list h3{font-family:var(--font-sans);font-size:18px;font-weight:600;margin-bottom:6px}
.pain-list p{font-size:14.5px;line-height:1.85;color:var(--muted)}

/* ---------- 图文交错 ---------- */
.feature-row{
  display:grid;grid-template-columns:1fr;gap:26px;align-items:center;
  padding:32px 0;border-bottom:1px solid var(--line);
}
.feature-row:last-child{border-bottom:0;padding-bottom:0}
.feature-row:first-child{padding-top:0}
@media(min-width:900px){
  .feature-row{grid-template-columns:.55fr .45fr;gap:52px;padding:44px 0}
  .feature-row.reverse .feature-media{order:2}
  .feature-row.reverse .feature-text{order:1}
}
.feature-media{border-radius:var(--r-card);overflow:hidden;background:var(--paper-2)}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .32s var(--ease)}
.feature-media:hover img{transform:scale(1.03)}
.feature-text h3{font-family:var(--font-sans);font-size:21px;font-weight:600;margin:14px 0 12px;line-height:1.45}
@media(min-width:768px){.feature-text h3{font-size:22px}}
.feature-text p{font-size:15.5px;line-height:1.9;color:var(--muted)}
.feature-text .text-link{margin-top:18px}
.figure-note{margin-top:10px;font-size:13px;color:var(--muted)}

/* ---------- 数据面板 ---------- */
.stats-panel{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:var(--ink-900);color:var(--inverse);padding:40px 24px 12px;
}
@media(min-width:768px){.stats-panel{padding:56px 44px 16px}}
@media(min-width:1024px){.stats-panel{padding:64px 56px 20px}}
.stats-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(420px 200px at 88% 6%,rgba(200,122,52,.16) 0%,rgba(200,122,52,0) 70%),
    radial-gradient(360px 180px at 4% 96%,rgba(51,96,92,.22) 0%,rgba(51,96,92,0) 72%);
}
.stats-panel > *{position:relative}
.stats-head{max-width:640px}
.stats-head .eyebrow{color:rgba(244,239,228,.6)}
.stats-head .h2{color:var(--inverse);font-size:25px}
@media(min-width:768px){.stats-head .h2{font-size:32px}}
.stats-head p{margin-top:14px;font-size:15px;line-height:1.9;color:var(--inverse-muted)}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);margin-top:34px;border-top:1px solid var(--line-dark)}
@media(min-width:900px){.stats-grid{grid-template-columns:repeat(4,1fr);margin-top:44px}}
.stats-grid li{
  padding:24px 12px 22px 0;border-bottom:1px solid var(--line-dark);
}
@media(min-width:900px){
  .stats-grid li{border-bottom:0;border-right:1px solid var(--line-dark);padding:28px 24px}
  .stats-grid li:first-child{padding-left:0}
  .stats-grid li:last-child{border-right:0;padding-right:0}
}
.stat-num{
  display:block;font-family:var(--font-serif);font-size:40px;line-height:1;
  color:var(--inverse);font-weight:600;letter-spacing:.02em;
}
@media(min-width:768px){.stat-num{font-size:52px}}
@media(min-width:1024px){.stat-num{font-size:60px}}
.stat-label{display:block;margin-top:12px;font-size:13.5px;color:var(--inverse-muted);line-height:1.6}
.stat-label em{font-style:normal;color:var(--star)}

/* ---------- 使用反馈 ---------- */
.quotes{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line)}
@media(min-width:900px){.quotes{grid-template-columns:1fr 1fr;column-gap:56px}}
.quote{padding:32px 0;border-bottom:1px solid var(--line)}
.quote p{
  font-family:var(--font-serif);font-size:19px;line-height:1.75;color:var(--text);
  font-weight:600;
}
@media(min-width:768px){.quote p{font-size:22px}}
.quote .sign{
  display:flex;align-items:center;gap:10px;margin-top:16px;
  font-size:13px;color:var(--muted);
}
.quote .sign::before{
  content:"";width:22px;height:1px;background:var(--star);display:block;
}

/* ---------- 最新信息列表 ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);gap:28px}}
.news-card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:var(--white);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(200,122,52,.35)}
.news-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1}
@media(min-width:768px){.news-body{padding:22px 22px 24px}}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}
.news-meta time{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.news-title{
  font-family:var(--font-sans);font-size:18px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .24s var(--ease);
}
@media(min-width:768px){.news-title{font-size:19px}}
.news-card:hover .news-title{color:var(--star)}
.news-excerpt{
  font-size:14px;line-height:1.78;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;color:var(--muted);font-size:14.5px;
  background:rgba(255,255,255,.5);
}
.empty-state svg{margin:0 auto 14px;display:block;stroke:var(--star);opacity:.75}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:100%;padding:20px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-family:var(--font-sans);font-size:16.5px;font-weight:600;color:var(--text);
  transition:color .24s var(--ease);
}
@media(min-width:768px){.faq-q{font-size:17px;padding:22px 0}}
.faq-q:hover{color:var(--star)}
.faq-sign{position:relative;width:16px;height:16px;flex:none}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;background:var(--star);border-radius:1px;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-sign::before{left:0;top:7px;width:16px;height:1.5px}
.faq-sign::after{left:7px;top:0;width:1.5px;height:16px}
.faq-item.open .faq-sign::after{transform:scaleY(0);opacity:0}
.faq-a{overflow:hidden;max-height:0;transition:max-height .26s var(--ease)}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 40px 22px 0;font-size:15px;line-height:1.9;color:var(--muted)}

/* ---------- 结尾 CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:var(--ink-900);color:var(--inverse);
  padding:44px 24px 40px;
}
@media(min-width:768px){.cta-panel{padding:64px 48px}}
@media(min-width:1024px){.cta-panel{padding:76px 64px}}
.cta-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(520px 240px at 92% 8%,rgba(200,122,52,.18) 0%,rgba(200,122,52,0) 72%);
}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:1024px){.cta-grid{grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}}
.cta-panel .h2{color:var(--inverse);font-size:26px;line-height:1.34}
@media(min-width:768px){.cta-panel .h2{font-size:34px}}
@media(min-width:1024px){.cta-panel .h2{font-size:38px}}
.cta-panel .lead{color:var(--inverse-muted);margin-top:16px;max-width:440px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:28px}
.form-panel{
  background:rgba(244,239,228,.04);border:1px solid rgba(244,239,228,.14);
  border-radius:var(--r-card);padding:22px;
}
@media(min-width:768px){.form-panel{padding:26px 26px 24px}}
.form-panel h3{
  font-family:var(--font-sans);font-size:15px;font-weight:600;color:var(--inverse);
  margin-bottom:16px;
}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:14px}
.field label{font-size:13px;color:var(--inverse-muted)}
.field input,.field textarea{
  width:100%;border:1px solid rgba(244,239,228,.18);background:rgba(255,255,255,.06);
  border-radius:var(--r-btn);color:var(--inverse);font-size:15px;
  transition:border-color .24s var(--ease),background-color .24s var(--ease);
}
.field input{height:44px;padding:0 14px}
.field textarea{min-height:88px;padding:11px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(169,175,184,.7)}
.field input:focus,.field textarea:focus{
  border-color:var(--star);background:rgba(255,255,255,.1);outline:none;
  box-shadow:0 0 0 2px rgba(200,122,52,.28);
}
.form-hint{font-size:12.5px;line-height:1.7;color:rgba(169,175,184,.85);margin-top:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);color:var(--inverse-muted);
  padding-top:56px;padding-bottom:28px;border-top:1px solid rgba(244,239,228,.1);
}
@media(min-width:768px){.site-footer{padding-top:72px}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}}
.footer-mark{
  display:block;font-family:var(--font-serif);font-size:22px;font-weight:700;
  letter-spacing:.16em;color:var(--inverse);
}
.footer-full{margin-top:8px;font-size:13.5px;color:var(--inverse);letter-spacing:.04em}
.footer-desc{margin-top:12px;font-size:13.5px;line-height:1.85;color:rgba(169,175,184,.9);max-width:280px}
.footer-col h4{
  font-family:var(--font-sans);font-size:13.5px;font-weight:600;color:var(--inverse);
  margin-bottom:14px;letter-spacing:.06em;
}
.footer-col li{margin-bottom:10px;font-size:13.5px;line-height:1.7}
.footer-col a{color:rgba(169,175,184,.92);transition:color .24s var(--ease)}
.footer-col a:hover{color:var(--inverse)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(244,239,228,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;
  font-size:12.5px;color:rgba(169,175,184,.8);
}

/* ---------- 入场 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .56s var(--ease),transform .56s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
    --ink-900:#0F1218;
    --ink-800:#171B23;
    --paper:#F7F4EE;
    --paper-2:#EFEAE0;
    --card:#FFFFFF;
    --line:#E3DCCD;
    --text:#191C22;
    --muted:#5B6169;
    --inverse:#F4EFE4;
    --inverse-muted:#A9AFB8;
    --star:#C87A34;
    --star-dark:#B06A2A;
    --teal:#33605C;
    --radius:4px;
    --shadow-soft:0 1px 2px rgba(15,18,24,.04);
    --shadow-lift:0 10px 28px rgba(15,18,24,.08);
    --ease:cubic-bezier(.2,.7,.3,1);
    --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
    --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
    --sidebar-w:228px;
    --pad-x:clamp(20px,4.4vw,64px);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body.site-body{
    margin:0;
    font-family:var(--sans);
    font-size:16px;
    line-height:1.85;
    color:var(--text);
    background:var(--paper);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  body.site-body.is-locked{overflow:hidden;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  a{color:inherit;text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease);}
  img{display:block;max-width:100%;height:auto;}
  button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  ::selection{background:rgba(200,122,52,.22);}
  :focus-visible{outline:2px solid var(--star);outline-offset:2px;}

  /* ============ 左侧固定导航 ============ */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
    background:var(--ink-900);color:var(--inverse);
    display:flex;flex-direction:column;
    padding:34px 22px 28px;
    border-right:1px solid rgba(244,239,228,.08);
    z-index:70;
  }
  .brand{display:block;padding:0 10px 26px;border-bottom:1px solid rgba(244,239,228,.12);}
  .brand-mark{
    font-family:var(--serif);font-size:24px;letter-spacing:.14em;font-weight:700;
    color:var(--inverse);display:block;line-height:1.2;
  }
  .brand-full{
    display:block;margin-top:8px;font-size:11.5px;line-height:1.6;
    color:var(--inverse-muted);letter-spacing:.04em;
  }
  .nav-list{display:flex;flex-direction:column;gap:2px;margin-top:24px;}
  .nav-item{
    position:relative;display:flex;align-items:baseline;gap:10px;
    padding:11px 12px;font-size:15px;color:var(--inverse-muted);
    border-radius:var(--radius);transition:color .24s var(--ease),background-color .24s var(--ease);
  }
  .nav-num{
    font-family:var(--serif);font-size:11px;letter-spacing:.1em;
    color:var(--star);opacity:.72;min-width:16px;
  }
  .nav-item::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);
    width:2px;height:18px;background:var(--star);border-radius:2px;
    transform-origin:center;transition:transform .24s var(--ease);
  }
  .nav-item::after{
    content:"";position:absolute;left:12px;bottom:6px;height:1px;width:0;
    background:var(--star);transition:width .24s var(--ease);
  }
  .nav-item:hover{color:var(--inverse);}
  .nav-item:hover::after{width:calc(100% - 24px);}
  .nav-item.is-active{color:#FFFFFF;background:rgba(244,239,228,.05);}
  .nav-item.is-active::before{transform:translateY(-50%) scaleY(1);}
  .nav-item.is-active .nav-num{font-weight:700;opacity:1;}
  .side-rule{height:1px;background:rgba(244,239,228,.12);margin:28px 10px 0;}
  .side-foot{margin-top:auto;padding:24px 10px 0;}
  .btn-side{
    display:block;text-align:center;padding:11px 14px;border:1px solid rgba(244,239,228,.28);
    border-radius:var(--radius);font-size:13.5px;color:var(--inverse);
    transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
  }
  .btn-side:hover{border-color:var(--star);color:var(--star);background:rgba(200,122,52,.08);}
  .side-note{margin-top:14px;font-size:11.5px;line-height:1.7;color:rgba(169,175,184,.8);}

  /* ============ 移动端顶栏与抽屉 ============ */
  .topbar{
    display:none;position:fixed;top:0;left:0;right:0;height:64px;z-index:80;
    background:rgba(15,18,24,.97);color:var(--inverse);
    align-items:center;justify-content:space-between;padding:0 18px;
    border-bottom:1px solid rgba(244,239,228,.12);
    backdrop-filter:blur(6px);
  }
  .topbar-brand{font-family:var(--serif);font-size:17px;letter-spacing:.1em;font-weight:700;}
  .topbar-brand small{display:block;font-family:var(--sans);font-size:10px;letter-spacing:.02em;color:var(--inverse-muted);font-weight:400;margin-top:2px;}
  .menu-btn{
    width:42px;height:42px;display:flex;flex-direction:column;justify-content:center;gap:5px;
    align-items:center;border:1px solid rgba(244,239,228,.22);border-radius:var(--radius);
  }
  .menu-btn span{display:block;width:18px;height:1.5px;background:var(--inverse);transition:transform .24s var(--ease),opacity .24s var(--ease);}
  .drawer{
    position:fixed;inset:0;z-index:90;background:var(--ink-800);
    transform:translateX(-100%);transition:transform .28s var(--ease);
    display:flex;flex-direction:column;padding:28px 24px 32px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding-bottom:20px;border-bottom:1px solid rgba(244,239,228,.14);}
  .drawer-brand{font-family:var(--serif);font-size:20px;letter-spacing:.12em;color:var(--inverse);font-weight:700;}
  .drawer-brand small{display:block;font-family:var(--sans);font-size:11px;font-weight:400;letter-spacing:.03em;color:var(--inverse-muted);margin-top:6px;}
  .drawer-close{width:38px;height:38px;border:1px solid rgba(244,239,228,.24);border-radius:var(--radius);color:var(--inverse);font-size:18px;line-height:1;}
  .drawer-nav{display:flex;flex-direction:column;margin-top:22px;}
  .drawer-item{
    display:flex;align-items:baseline;gap:12px;padding:16px 4px;font-size:20px;
    color:var(--inverse-muted);border-bottom:1px solid rgba(244,239,228,.1);
  }
  .drawer-item .dn{font-family:var(--serif);font-size:12px;color:var(--star);letter-spacing:.1em;}
  .drawer-item.is-active{color:#FFFFFF;}
  .drawer-btn{
    margin-top:26px;display:block;text-align:center;padding:13px;border-radius:var(--radius);
    background:var(--star);color:#FFF;font-size:15px;
  }
  .drawer-btn:hover{background:var(--star-dark);}

  /* ============ 主内容框架 ============ */
  .main{margin-left:var(--sidebar-w);min-height:100vh;}
  .page{max-width:1200px;margin:0 auto;padding-left:var(--pad-x);padding-right:var(--pad-x);}
  .section{padding:88px 0;}
  .section--tight{padding:56px 0;}
  .section-line{border-top:1px solid var(--line);}

  /* ============ Hero ============ */
  .hero-panel{padding-top:64px;padding-bottom:52px;border-bottom:1px solid var(--line);}
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
  .crumbs a:hover{color:var(--star);}
  .crumbs .dot{width:3px;height:3px;border-radius:50%;background:#C3BCAC;}
  .crumbs .current{color:var(--text);}
  .hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:48px;align-items:end;margin-top:26px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
    color:var(--teal);text-transform:uppercase;margin-bottom:18px;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--star);box-shadow:0 0 0 4px rgba(200,122,52,.14);}
  .hero-h1{
    font-family:var(--serif);font-weight:700;letter-spacing:.01em;
    font-size:clamp(28px,3.9vw,44px);line-height:1.26;color:var(--text);
  }
  .hero-h1 em{font-style:normal;color:var(--star);}
  .hero-lead{font-size:15.5px;line-height:1.9;color:var(--muted);border-left:1px solid var(--line);padding-left:22px;}
  .hero-lead strong{color:var(--text);font-weight:600;}

  /* ============ 通用区块标题 ============ */
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:40px;flex-wrap:wrap;}
  .h2{font-family:var(--serif);font-size:clamp(23px,2.5vw,32px);line-height:1.35;font-weight:700;color:var(--text);}
  .h2-sub{margin-top:12px;font-size:15px;line-height:1.9;color:var(--muted);max-width:640px;}
  .head-note{font-size:13px;color:var(--muted);}

  /* ============ 登录前准备 ============ */
  .prep-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--line);}
  .prep-item{padding:26px 28px 26px 0;border-bottom:1px solid var(--line);position:relative;}
  .prep-item + .prep-item{padding-left:28px;border-left:1px solid var(--line);}
  .prep-num{font-family:var(--serif);font-size:15px;letter-spacing:.12em;color:var(--star);}
  .prep-title{font-size:17px;font-weight:600;margin-top:10px;line-height:1.5;}
  .prep-text{margin-top:8px;font-size:14.5px;line-height:1.85;color:var(--muted);}

  /* ============ 步骤流 ============ */
  .steps{border-top:1px solid var(--line);}
  .step{
    display:grid;grid-template-columns:96px minmax(0,1fr);gap:30px;
    padding:34px 0;border-bottom:1px solid var(--line);
    transition:background-color .3s var(--ease);
  }
  .step:hover{background:rgba(239,234,224,.5);}
  .step-left{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding-left:6px;}
  .step-num{font-family:var(--serif);font-size:38px;line-height:1;font-weight:600;color:rgba(25,28,34,.22);letter-spacing:.02em;}
  .step.is-key .step-num{color:var(--star);}
  .step-dot{width:7px;height:7px;border-radius:50%;background:var(--star);box-shadow:0 0 0 4px rgba(200,122,52,.12);margin-left:3px;}
  .step-title{font-size:19px;font-weight:600;line-height:1.5;letter-spacing:.01em;}
  .step-text{margin-top:10px;font-size:15px;line-height:1.95;color:var(--muted);max-width:720px;}
  .step-text strong{color:var(--text);font-weight:600;}
  .step-tip{
    display:inline-flex;align-items:center;gap:6px;margin-top:14px;
    font-size:12.5px;color:var(--teal);background:rgba(51,96,92,.1);
    padding:4px 12px;border-radius:999px;
  }

  /* ============ 宽幅图 ============ */
  .figure{margin:0;}
  .figure-frame{
    position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);
    aspect-ratio:16/6;background:linear-gradient(135deg,#1B2029,#0F1218);
  }
  .figure-frame img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);}
  .figure-frame:hover img{transform:scale(1.03);}
  .figure-frame::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:radial-gradient(120% 90% at 50% 40%,rgba(15,18,24,0) 40%,rgba(15,18,24,.35) 100%);
  }
  .figcaption{margin-top:12px;font-size:13px;color:var(--muted);}

  /* ============ HUD 深色面板 ============ */
  .hud{
    background:var(--ink-900);color:var(--inverse);border-radius:var(--radius);
    padding:clamp(28px,4vw,52px);position:relative;overflow:hidden;
  }
  .hud::before{
    content:"";position:absolute;top:-60px;right:-40px;width:200px;height:200px;border-radius:50%;
    background:radial-gradient(circle,rgba(200,122,52,.22),rgba(200,122,52,0) 70%);
  }
  .hud-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:16px;border-bottom:1px solid rgba(244,239,228,.14);padding-bottom:20px;position:relative;}
  .hud-title{font-family:var(--serif);font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--inverse);}
  .hud-tag{font-size:12px;letter-spacing:.1em;color:var(--star);border:1px solid rgba(200,122,52,.45);padding:3px 10px;border-radius:999px;}
  .hud-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:28px;position:relative;}
  .hud-cell{padding:0 22px;border-left:1px solid rgba(244,239,228,.12);}
  .hud-cell:first-child{padding-left:0;border-left:0;}
  .hud-num{font-family:var(--serif);font-size:13px;letter-spacing:.12em;color:var(--star);}
  .hud-cell-title{margin-top:10px;font-size:16px;font-weight:600;color:#FFFFFF;line-height:1.5;}
  .hud-cell-text{margin-top:8px;font-size:13.5px;line-height:1.8;color:var(--inverse-muted);}

  /* ============ 对比面板 ============ */
  .compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
  .compare-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    padding:30px 28px;box-shadow:var(--shadow-soft);transition:box-shadow .28s var(--ease),transform .28s var(--ease),border-color .28s var(--ease);
  }
  .compare-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:rgba(200,122,52,.35);}
  .compare-card.is-warn{background:var(--paper-2);border-left:3px solid var(--star);}
  .compare-label{display:inline-block;font-size:12px;letter-spacing:.08em;padding:3px 12px;border-radius:999px;background:rgba(51,96,92,.1);color:var(--teal);}
  .compare-card.is-warn .compare-label{background:rgba(200,122,52,.14);color:#9C5C22;}
  .compare-title{margin-top:14px;font-size:19px;font-weight:600;line-height:1.5;}
  .compare-list{margin-top:16px;display:flex;flex-direction:column;}
  .compare-list li{
    position:relative;padding:11px 0 11px 20px;font-size:14.5px;line-height:1.8;color:var(--muted);
    border-top:1px solid var(--line);
  }
  .compare-list li:first-child{border-top:0;}
  .compare-list li::before{
    content:"";position:absolute;left:0;top:19px;width:6px;height:6px;border-radius:50%;
    background:var(--teal);
  }
  .compare-card.is-warn .compare-list li::before{background:var(--star);}

  /* ============ FAQ ============ */
  .faq{max-width:840px;margin:0 auto;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;
    padding:22px 4px;text-align:left;font-size:16.5px;font-weight:600;line-height:1.6;color:var(--text);
    transition:color .24s var(--ease);
  }
  .faq-q:hover{color:var(--star);}
  .faq-icon{position:relative;flex:0 0 16px;height:16px;transition:transform .24s var(--ease);}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--star);border-radius:1px;transition:opacity .24s var(--ease),transform .24s var(--ease);
  }
  .faq-icon::before{left:0;top:7.25px;width:16px;height:1.5px;}
  .faq-icon::after{left:7.25px;top:0;width:1.5px;height:16px;}
  .faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
  .faq-body{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
  .faq-body-inner{padding:0 4px 24px;font-size:15px;line-height:1.95;color:var(--muted);max-width:720px;}

  /* ============ CTA ============ */
  .cta-band{
    border:1px solid var(--line);border-radius:var(--radius);background:var(--card);
    padding:clamp(28px,4vw,52px);display:flex;flex-wrap:wrap;align-items:center;
    justify-content:space-between;gap:28px;
  }
  .cta-title{font-family:var(--serif);font-size:clamp(21px,2.4vw,28px);font-weight:700;line-height:1.4;}
  .cta-text{margin-top:10px;font-size:14.5px;line-height:1.9;color:var(--muted);max-width:520px;}
  .cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;}

  /* ============ 按钮与链接 ============ */
  .btn-primary{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 26px;border-radius:var(--radius);
    background:var(--star);color:#FFFFFF;font-size:15px;font-weight:500;
    transition:background-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
  }
  .btn-primary:hover{background:var(--star-dark);transform:translateY(-1px);box-shadow:var(--shadow-lift);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 26px;border-radius:var(--radius);
    border:1px solid var(--line);color:var(--text);font-size:15px;background:transparent;
    transition:border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
  }
  .btn-ghost:hover{border-color:var(--star);color:var(--star);transform:translateY(-1px);}
  .link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;color:var(--teal);position:relative;}
  .link-arrow .arw{transition:transform .24s var(--ease);}
  .link-arrow::after{
    content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--star);
    transition:width .24s var(--ease);
  }
  .link-arrow:hover{color:var(--star);}
  .link-arrow:hover::after{width:calc(100% - 16px);}
  .link-arrow:hover .arw{transform:translateX(2px);}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink-900);color:var(--inverse-muted);padding:64px 0 28px;margin-top:0;}
  .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;}
  .footer-mark{font-family:var(--serif);font-size:22px;letter-spacing:.14em;color:var(--inverse);font-weight:700;display:block;}
  .footer-full{margin-top:8px;font-size:12.5px;letter-spacing:.04em;color:var(--inverse-muted);}
  .footer-desc{margin-top:16px;font-size:13.5px;line-height:1.9;color:rgba(169,175,184,.86);max-width:340px;}
  .footer-col h4{font-size:14px;color:var(--inverse);font-weight:600;margin-bottom:16px;letter-spacing:.04em;}
  .footer-col ul{display:flex;flex-direction:column;gap:11px;}
  .footer-col li,.footer-col a{font-size:13.5px;line-height:1.7;color:var(--inverse-muted);}
  .footer-col a:hover{color:var(--inverse);}
  .footer-bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid rgba(244,239,228,.12);
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
    font-size:12.5px;color:rgba(169,175,184,.72);
  }

  /* ============ 动效 ============ */
  html.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
  html.js .reveal.is-visible{opacity:1;transform:none;}
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    *,*::before,*::after{animation:none !important;transition-duration:.001ms !important;}
    html.js .reveal{opacity:1;transform:none;}
  }

  /* ============ 响应式 ============ */
  @media (min-width:1280px){
    :root{--sidebar-w:260px;}
  }
  @media (max-width:1023px){
    .sidebar{display:none;}
    .topbar{display:flex;}
    .main{margin-left:0;padding-top:64px;}
    .hero-panel{padding-top:40px;}
    .hero-grid{grid-template-columns:1fr;gap:22px;align-items:start;}
    .hero-lead{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:18px;}
    .prep-list{grid-template-columns:1fr;}
    .prep-item + .prep-item{padding-left:0;border-left:0;}
    .prep-item{padding:22px 0;}
    .hud-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 0;}
    .hud-cell{padding:0 18px;}
    .hud-cell:nth-child(odd){padding-left:0;border-left:0;}
    .compare{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .section{padding:64px 0;}
  }
  @media (max-width:767px){
    .step{grid-template-columns:56px minmax(0,1fr);gap:16px;padding:26px 0;}
    .step-num{font-size:28px;}
    .step-left{padding-left:0;}
    .step-title{font-size:17px;}
    .step-text{font-size:14.5px;}
    .figure-frame{aspect-ratio:16/9;}
    .cta-band{flex-direction:column;align-items:flex-start;}
    .cta-actions{width:100%;}
    .btn-primary,.btn-ghost{flex:1 1 auto;}
    .faq-q{font-size:15.5px;padding:18px 2px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;}
    .hud-grid{grid-template-columns:1fr;gap:20px;}
    .hud-cell{padding:0;border-left:0;}
  }
  @media (max-width:520px){
    .hero-h1{font-size:27px;}
    .prep-list{border-top:0;}
    .section{padding:52px 0;}
    .compare-card{padding:22px 20px;}
  }

/* roulang page: article */
:root{
    --ink-900:#0F1218;
    --ink-800:#171B23;
    --paper:#F7F4EE;
    --paper-2:#EFEAE0;
    --card:#FFFFFF;
    --line:#E3DCCD;
    --line-dark:rgba(244,239,228,.14);
    --text:#191C22;
    --muted:#5B6169;
    --invert:#F4EFE4;
    --invert-2:#A9AFB8;
    --star:#C87A34;
    --star-dark:#B06A29;
    --teal:#33605C;
    --radius:4px;
    --shadow-sm:0 1px 2px rgba(15,18,24,.04);
    --shadow-md:0 10px 28px rgba(15,18,24,.08);
    --ease:cubic-bezier(.2,.7,.3,1);
    --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
    --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
    --sidebar-w:228px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:var(--sans);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  ul,ol{margin:0;padding:0;}
  h1,h2,h3,h4,p{margin:0;}
  ::selection{background:rgba(200,122,52,.22);}
  a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
    outline:2px solid var(--star);
    outline-offset:2px;
    border-radius:2px;
  }

  /* ---------- 骨架 ---------- */
  .site-shell{min-height:100vh;}
  .sidebar{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--sidebar-w);
    background:var(--ink-900);
    color:var(--invert);
    display:flex;
    flex-direction:column;
    padding:34px 22px 26px;
    z-index:60;
    overflow-y:auto;
    scrollbar-width:thin;
  }
  .brand{display:block;margin-bottom:38px;}
  .brand-mark{
    display:block;
    font-family:var(--serif);
    font-size:27px;
    font-weight:700;
    letter-spacing:.1em;
    color:var(--invert);
    line-height:1.2;
  }
  .brand-full{
    display:block;
    margin-top:9px;
    font-size:11px;
    line-height:1.65;
    letter-spacing:.05em;
    color:var(--invert-2);
  }
  .nav-list{
    display:flex;
    flex-direction:column;
    gap:2px;
    padding-top:24px;
    border-top:1px solid var(--line-dark);
  }
  .nav-item{
    position:relative;
    display:flex;
    align-items:center;
    gap:11px;
    padding:11px 10px 11px 9px;
    font-size:14.5px;
    line-height:1.4;
    color:#98A0A9;
    border-left:2px solid transparent;
    transition:color .24s var(--ease), background-color .24s var(--ease), border-color .24s var(--ease);
  }
  .nav-item::after{
    content:"";
    position:absolute;
    left:9px;right:10px;bottom:6px;
    height:1px;
    background:var(--star);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform .24s var(--ease);
  }
  .nav-item:hover{color:var(--invert);background:rgba(255,255,255,.03);}
  .nav-item:hover::after{transform:scaleX(1);}
  .nav-item.is-active{
    color:#FFFFFF;
    border-left-color:var(--star);
    background:rgba(255,255,255,.045);
    font-weight:600;
  }
  .nav-item.is-active .nav-num{font-weight:700;}
  .nav-num{
    font-family:var(--serif);
    font-size:11px;
    letter-spacing:.1em;
    color:var(--star);
    min-width:18px;
  }
  .side-foot{margin-top:auto;padding-top:26px;border-top:1px solid var(--line-dark);}
  .side-note{
    margin-top:14px;
    font-size:11.5px;
    line-height:1.7;
    color:var(--invert-2);
  }
  .side-mail{margin-top:12px;font-size:11.5px;color:#7E858E;letter-spacing:.02em;}

  /* ---------- 移动顶栏 ---------- */
  .mobile-bar{
    display:none;
    position:fixed;
    top:0;left:0;right:0;
    height:64px;
    align-items:center;
    justify-content:space-between;
    padding:0 18px;
    background:var(--ink-900);
    color:var(--invert);
    z-index:70;
    border-bottom:1px solid var(--line-dark);
  }
  .mobile-brand{display:block;line-height:1.25;}
  .mobile-brand b{
    display:block;
    font-family:var(--serif);
    font-size:19px;
    font-weight:700;
    letter-spacing:.1em;
  }
  .mobile-brand span{
    display:block;
    font-size:10px;
    letter-spacing:.04em;
    color:var(--invert-2);
    margin-top:2px;
  }
  .burger{
    width:42px;height:42px;
    display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line-dark);
    border-radius:var(--radius);
    color:var(--invert);
    transition:border-color .22s var(--ease),color .22s var(--ease);
  }
  .burger:hover{border-color:var(--star);color:var(--star);}
  .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;
    transition:transform .24s var(--ease),top .24s var(--ease);
  }
  .burger span::before{top:-6px;}
  .burger span::after{top:6px;}

  .drawer{
    position:fixed;
    inset:0;
    background:var(--ink-800);
    color:var(--invert);
    z-index:90;
    padding:24px 22px 32px;
    display:flex;
    flex-direction:column;
    transform:translateX(100%);
    transition:transform .28s var(--ease);
    visibility:hidden;
    overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0);visibility:visible;}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:30px;}
  .drawer-title{font-family:var(--serif);font-size:20px;letter-spacing:.1em;}
  .drawer-close{
    width:42px;height:42px;display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line-dark);border-radius:var(--radius);font-size:20px;line-height:1;
    color:var(--invert);
  }
  .drawer-close:hover{border-color:var(--star);color:var(--star);}
  .drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line-dark);}
  .drawer-link{
    display:flex;align-items:baseline;gap:12px;
    padding:16px 2px;
    font-size:20px;
    font-family:var(--serif);
    color:var(--invert);
    border-bottom:1px solid var(--line-dark);
  }
  .drawer-link .nav-num{font-size:12px;color:var(--star);}
  .drawer-link:hover{color:var(--star);}
  body.no-scroll{overflow:hidden;}

  /* ---------- 内容区 ---------- */
  .content{
    margin-left:var(--sidebar-w);
    min-height:100vh;
    display:flex;
    flex-direction:column;
  }
  .main{
    flex:1 1 auto;
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:40px 48px 90px;
  }

  /* ---------- 按钮与徽章 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:46px;
    padding:0 26px;
    border-radius:var(--radius);
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    letter-spacing:.02em;
    cursor:pointer;
    transition:background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
  }
  .btn-primary{background:var(--star);color:#FFFFFF;}
  .btn-primary:hover{background:var(--star-dark);transform:translateY(-1px);box-shadow:var(--shadow-md);}
  .btn-primary:active{transform:translateY(0);background:var(--star-dark);}
  .btn-outline{border-color:var(--line);color:var(--text);background:transparent;}
  .btn-outline:hover{border-color:var(--star);color:var(--star);}
  .btn-outline:active{background:var(--paper-2);}
  .btn-on-dark{border-color:rgba(244,239,228,.28);color:var(--invert);background:transparent;}
  .btn-on-dark:hover{border-color:var(--star);color:var(--star);}
  .btn-block{width:100%;height:42px;font-size:13.5px;}
  .link-arrow{
    display:inline-flex;align-items:center;gap:7px;
    font-size:14.5px;font-weight:600;color:var(--teal);
    transition:color .22s var(--ease);
  }
  .link-arrow .arw{transition:transform .22s var(--ease);}
  .link-arrow:hover{color:var(--star);}
  .link-arrow:hover .arw{transform:translateX(2px);}
  .tag{
    display:inline-flex;align-items:center;
    padding:4px 13px;
    border-radius:999px;
    font-size:12.5px;
    font-weight:600;
    letter-spacing:.04em;
    color:var(--teal);
    background:rgba(51,96,92,.11);
    white-space:nowrap;
  }
  .tag-outline{
    color:var(--muted);
    background:transparent;
    border:1px solid var(--line);
    font-weight:500;
  }

  /* ---------- 面包屑 ---------- */
  .crumbs{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--muted);
    line-height:1.6;
  }
  .crumbs a{transition:color .2s var(--ease);}
  .crumbs a:hover{color:var(--star);}
  .crumbs .dot{color:#C4BEB0;font-size:11px;}
  .crumbs .now{color:var(--text);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

  /* ---------- 文章头 ---------- */
  .article-head{padding-top:26px;}
  .article-title{
    font-family:var(--serif);
    font-size:clamp(26px,3.2vw,42px);
    line-height:1.32;
    font-weight:700;
    letter-spacing:.01em;
    margin-top:16px;
    word-break:break-word;
  }
  .article-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:14px;
    margin-top:20px;
    font-size:13.5px;
    color:var(--muted);
  }
  .article-meta .sep{width:1px;height:12px;background:var(--line);display:inline-block;}
  .rule{height:1px;background:var(--line);margin:26px 0 0;}

  /* ---------- 文章主体布局 ---------- */
  .article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 280px;
    gap:56px;
    margin-top:38px;
    align-items:start;
  }
  .article-main{min-width:0;}
  .article-body{
    max-width:720px;
    font-size:17px;
    line-height:1.9;
    color:#22262D;
    overflow-wrap:break-word;
    word-break:break-word;
  }
  .article-body > *:first-child{margin-top:0;}
  .article-body p{margin:0 0 1.2em;}
  .article-body h2{
    font-family:var(--serif);
    font-size:clamp(22px,2.2vw,28px);
    line-height:1.42;
    font-weight:700;
    color:var(--text);
    margin:2.4em 0 .8em;
    padding-left:14px;
    border-left:3px solid var(--star);
    scroll-margin-top:84px;
  }
  .article-body h3{
    font-size:20px;
    line-height:1.5;
    font-weight:600;
    color:var(--text);
    margin:1.9em 0 .6em;
    scroll-margin-top:84px;
  }
  .article-body h4{
    font-size:17px;
    font-weight:600;
    margin:1.6em 0 .5em;
    color:var(--text);
  }
  .article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.45em;}
  .article-body ul{list-style:disc;}
  .article-body ol{list-style:decimal;}
  .article-body li{margin:.4em 0;line-height:1.85;}
  .article-body li::marker{color:var(--star);}
  .article-body blockquote{
    margin:1.7em 0;
    padding:14px 20px;
    background:var(--paper-2);
    border-left:3px solid var(--star);
    color:#3B4048;
    border-radius:0 var(--radius) var(--radius) 0;
  }
  .article-body blockquote p:last-child{margin-bottom:0;}
  .article-body img{
    max-width:100%;
    height:auto;
    margin:1.7em auto;
    border-radius:var(--radius);
  }
  .article-body figure{margin:1.7em 0;}
  .article-body figcaption{
    margin-top:9px;
    font-size:13px;
    line-height:1.7;
    color:var(--muted);
    text-align:center;
  }
  .article-body a{
    color:var(--teal);
    text-decoration:underline;
    text-decoration-thickness:1px;
    text-underline-offset:3px;
    transition:color .2s var(--ease);
  }
  .article-body a:hover{color:var(--star);}
  .article-body strong{font-weight:600;color:#141820;}
  .article-body hr{border:0;height:1px;background:var(--line);margin:2.4em 0;}
  .article-body table{
    width:100%;
    border-collapse:collapse;
    margin:1.7em 0;
    font-size:14.5px;
    line-height:1.7;
    display:block;
    overflow-x:auto;
    white-space:nowrap;
  }
  .article-body th,.article-body td{
    border:1px solid var(--line);
    padding:10px 13px;
    text-align:left;
    vertical-align:top;
  }
  .article-body th{font-weight:600;background:var(--paper-2);color:var(--text);}
  .article-body code{
    background:var(--paper-2);
    padding:2px 6px;
    border-radius:3px;
    font-size:.9em;
    word-break:break-all;
  }
  .article-body pre{
    background:var(--ink-800);
    color:var(--invert);
    padding:16px 18px;
    border-radius:var(--radius);
    overflow-x:auto;
    font-size:14px;
    line-height:1.7;
    margin:1.7em 0;
  }
  .article-body pre code{background:none;padding:0;color:inherit;}

  /* ---------- 侧栏 ---------- */
  .article-side{position:relative;}
  .side-sticky{position:sticky;top:32px;}
  .side-block{padding-top:18px;border-top:1px solid var(--line);}
  .side-block + .side-block{margin-top:32px;}
  .side-block h3{
    font-size:12px;
    letter-spacing:.16em;
    font-weight:600;
    color:var(--muted);
    margin-bottom:14px;
  }
  .toc-list{list-style:none;margin:0;padding:0;}
  .toc-list li{margin:0;}
  .toc-list a{
    display:block;
    padding:7px 0 7px 12px;
    font-size:13.5px;
    line-height:1.6;
    color:#4A5057;
    border-left:2px solid transparent;
    transition:color .2s var(--ease),border-color .2s var(--ease),padding-left .2s var(--ease);
  }
  .toc-list a:hover{color:var(--star);}
  .toc-list a.is-current{
    color:var(--star);
    border-left-color:var(--star);
    font-weight:600;
    padding-left:14px;
  }
  .rel-list{list-style:none;margin:0;padding:0;}
  .rel-list li{margin:0;border-bottom:1px solid var(--line);}
  .rel-list li:last-child{border-bottom:0;}
  .rel-list a{
    display:block;
    padding:11px 0;
    font-size:13.5px;
    line-height:1.65;
    color:#3E444C;
    transition:color .2s var(--ease);
  }
  .rel-list a:hover{color:var(--star);}
  .rel-list .rel-meta{display:block;margin-top:5px;font-size:12px;color:var(--muted);}
  .side-tip{
    background:var(--paper-2);
    border-radius:var(--radius);
    padding:16px 16px;
    font-size:13px;
    line-height:1.75;
    color:#4A5057;
  }
  .side-tip b{display:block;color:var(--text);font-size:13.5px;margin-bottom:6px;}

  /* ---------- 文末 ---------- */
  .article-foot{
    max-width:720px;
    margin-top:56px;
    padding-top:28px;
    border-top:1px solid var(--line);
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    align-items:center;
  }
  .reco-wrap{max-width:1010px;margin-top:52px;}
  .reco-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;}
  .reco-head h2{
    font-family:var(--serif);
    font-size:clamp(20px,2vw,25px);
    font-weight:700;
    line-height:1.4;
  }
  .reco-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
  .reco-card{
    display:block;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:20px 20px 18px;
    transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  }
  .reco-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-md);
    border-color:rgba(200,122,52,.35);
  }
  .reco-card h3{
    font-size:15.5px;
    font-weight:600;
    line-height:1.6;
    margin-bottom:10px;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }
  .reco-card p{
    font-size:13px;
    line-height:1.7;
    color:var(--muted);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    margin-bottom:14px;
  }
  .reco-card .reco-foot{
    display:flex;align-items:center;justify-content:space-between;
    font-size:12.5px;color:var(--muted);
  }

  /* ---------- CTA 条 ---------- */
  .cta-bar{
    position:relative;
    margin-top:56px;
    border-radius:var(--radius);
    overflow:hidden;
    background:var(--ink-900);
    color:var(--invert);
    padding:44px 44px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    flex-wrap:wrap;
  }
  .cta-bar::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-3.png');
    background-size:cover;
    background-position:center;
    opacity:.16;
    pointer-events:none;
  }
  .cta-bar > *{position:relative;z-index:1;}
  .cta-bar h2{
    font-family:var(--serif);
    font-size:clamp(21px,2.3vw,29px);
    line-height:1.42;
    font-weight:700;
    color:#FFFFFF;
    max-width:560px;
  }
  .cta-bar p{
    margin-top:12px;
    font-size:14.5px;
    line-height:1.8;
    color:var(--invert-2);
    max-width:560px;
  }
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

  /* ---------- 空态 ---------- */
  .empty-state{
    border:1px dashed var(--line);
    border-radius:var(--radius);
    padding:48px 24px;
    text-align:center;
    background:rgba(255,255,255,.5);
  }
  .empty-state .empty-title{
    font-family:var(--serif);
    font-size:20px;
    font-weight:700;
    margin-bottom:10px;
  }
  .empty-state p{font-size:14.5px;color:var(--muted);margin-bottom:20px;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--ink-900);
    color:var(--invert-2);
    padding:58px 0 26px;
    margin-top:auto;
  }
  .page{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 48px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:36px;
  }
  .footer-mark{
    display:block;
    font-family:var(--serif);
    font-size:22px;
    font-weight:700;
    letter-spacing:.1em;
    color:var(--invert);
  }
  .footer-full{
    margin-top:8px;
    font-size:13px;
    letter-spacing:.04em;
    color:#C6CBD3;
  }
  .footer-desc{
    margin-top:14px;
    font-size:13.5px;
    line-height:1.8;
    color:var(--invert-2);
    max-width:330px;
  }
  .footer-col h4{
    font-size:12.5px;
    font-weight:600;
    letter-spacing:.14em;
    color:var(--invert);
    margin-bottom:16px;
  }
  .footer-col ul{list-style:none;margin:0;padding:0;}
  .footer-col li{font-size:13.5px;line-height:1.7;margin-bottom:10px;color:var(--invert-2);}
  .footer-col a{transition:color .2s var(--ease);}
  .footer-col a:hover{color:var(--invert);}
  .footer-bottom{
    margin-top:42px;
    padding-top:20px;
    border-top:1px solid var(--line-dark);
    display:flex;
    flex-wrap:wrap;
    gap:12px 24px;
    justify-content:space-between;
    font-size:12.5px;
    color:#8E959E;
  }

  /* ---------- 入场动效 ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
  .reveal.is-in{opacity:1;transform:none;}

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

  /* ---------- 响应式 ---------- */
  @media (min-width:1280px){
    :root{--sidebar-w:260px;}
    .sidebar{padding:38px 26px 28px;}
    .main{padding:52px 64px 104px;}
    .page{padding:0 64px;}
  }
  @media (max-width:1279px){
    .article-layout{grid-template-columns:minmax(0,1fr) 250px;gap:40px;}
  }
  @media (max-width:1100px){
    .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
    .article-side{display:none;}
    .article-body{max-width:100%;}
    .article-foot{max-width:100%;}
  }
  @media (max-width:1023px){
    .sidebar{display:none;}
    .mobile-bar{display:flex;}
    .content{margin-left:0;padding-top:64px;}
    .main{padding:28px 28px 72px;}
    .page{padding:0 28px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
    .footer-brand{grid-column:1 / -1;}
    .reco-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .cta-bar{padding:34px 30px;}
  }
  @media (max-width:767px){
    body{font-size:15.5px;}
    .main{padding:22px 18px 56px;}
    .page{padding:0 18px;}
    .article-title{line-height:1.36;}
    .article-meta{gap:10px;font-size:12.5px;}
    .article-body{font-size:16px;line-height:1.88;}
    .article-body h2{font-size:21px;padding-left:11px;border-left-width:3px;margin-top:2em;}
    .article-body h3{font-size:18px;}
    .article-body table{font-size:13.5px;}
    .reco-grid{grid-template-columns:minmax(0,1fr);}
    .reco-head h2{font-size:20px;}
    .cta-bar{padding:28px 22px;gap:22px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1 1 auto;}
    .site-footer{padding:44px 0 22px;}
    .footer-grid{grid-template-columns:1fr;gap:26px;}
    .footer-bottom{flex-direction:column;gap:8px;}
    .article-foot .btn{flex:1 1 auto;}
  }
  @media (max-width:520px){
    .crumbs .now{white-space:normal;}
    .article-meta .sep{display:none;}
    .reco-card{padding:16px;}
    .btn{height:44px;padding:0 20px;font-size:14.5px;}
  }

/* roulang page: category3 */
:root{
    --ink-900:#0F1218;
    --ink-800:#171B23;
    --paper:#F7F4EE;
    --paper-2:#EFEAE0;
    --card:#FFFFFF;
    --line:#E3DCCD;
    --line-dark:rgba(244,239,228,.14);
    --text:#191C22;
    --muted:#5B6169;
    --light:#F4EFE4;
    --light-muted:#A9AFB8;
    --star:#C87A34;
    --star-deep:#B06826;
    --teal:#33605C;
    --radius:4px;
    --shadow-sm:0 1px 2px rgba(15,18,24,.04);
    --shadow-md:0 10px 28px rgba(15,18,24,.08);
    --ease:cubic-bezier(.2,.7,.3,1);
    --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
    --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
    --sidebar-w:228px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  body.no-scroll{overflow:hidden}
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p,figure{margin:0}
  a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
    outline:2px solid var(--star);
    outline-offset:2px;
    border-radius:2px;
  }

  /* ---------- 侧栏 ---------- */
  .sidebar{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--sidebar-w);
    background:var(--ink-900);
    color:var(--light);
    padding:34px 22px 26px;
    display:flex;
    flex-direction:column;
    overflow-y:auto;
    z-index:60;
    border-right:1px solid rgba(244,239,228,.06);
  }
  .brand{display:block;padding-bottom:26px;border-bottom:1px solid var(--line-dark)}
  .brand-mark{
    display:block;
    font-family:var(--font-serif);
    font-size:24px;
    font-weight:700;
    letter-spacing:.14em;
    color:var(--light);
  }
  .brand-full{
    display:block;
    margin-top:8px;
    font-size:12px;
    line-height:1.7;
    letter-spacing:.04em;
    color:var(--light-muted);
  }
  .nav-list{margin-top:26px;display:flex;flex-direction:column;gap:2px}
  .nav-item{
    position:relative;
    display:flex;
    align-items:center;
    gap:10px;
    padding:11px 10px 11px 12px;
    font-size:14.5px;
    color:#8E96A2;
    border-left:2px solid transparent;
    border-radius:0 3px 3px 0;
    transition:color 240ms var(--ease),background-color 240ms var(--ease),border-color 240ms var(--ease);
  }
  .nav-num{
    font-family:var(--font-serif);
    font-size:11px;
    letter-spacing:.08em;
    color:var(--star);
    opacity:.85;
  }
  .nav-item::after{
    content:"";
    position:absolute;
    left:12px;right:10px;bottom:6px;
    height:1px;
    background:var(--star);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform 240ms var(--ease);
  }
  .nav-item:hover{color:var(--light);background:rgba(244,239,228,.04)}
  .nav-item:hover::after{transform:scaleX(1)}
  .nav-item.is-active{
    color:var(--light);
    border-left-color:var(--star);
    background:rgba(200,122,52,.10);
    font-weight:600;
  }
  .nav-item.is-active .nav-num{opacity:1;font-weight:700}
  .nav-item.is-active::after{transform:scaleX(0)}
  .sidebar-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--line-dark)}
  .sidebar-note{
    margin-top:12px;
    font-size:12px;
    line-height:1.7;
    color:#7C848F;
  }

  /* ---------- 移动端顶栏与抽屉 ---------- */
  .topbar{
    display:none;
    position:fixed;
    top:0;left:0;right:0;
    height:64px;
    padding:0 18px;
    background:var(--ink-900);
    color:var(--light);
    align-items:center;
    justify-content:space-between;
    z-index:70;
    border-bottom:1px solid rgba(244,239,228,.08);
  }
  .topbar-brand{display:flex;align-items:center;gap:10px;min-width:0}
  .topbar-mark{
    font-family:var(--font-serif);
    font-size:19px;
    font-weight:700;
    letter-spacing:.12em;
    white-space:nowrap;
  }
  .topbar-full{
    font-size:10.5px;
    line-height:1.4;
    color:var(--light-muted);
    letter-spacing:.02em;
    max-width:132px;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .menu-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:42px;height:42px;
    background:transparent;
    border:1px solid rgba(244,239,228,.22);
    border-radius:var(--radius);
    color:var(--light);
    cursor:pointer;
    transition:border-color 220ms var(--ease),color 220ms var(--ease);
  }
  .menu-btn:hover{border-color:var(--star);color:var(--star)}
  .menu-lines{position:relative;width:18px;height:12px}
  .menu-lines::before,.menu-lines::after,.menu-lines span{
    content:"";
    position:absolute;left:0;width:18px;height:1.5px;
    background:currentColor;border-radius:2px;
  }
  .menu-lines::before{top:0}
  .menu-lines span{top:5.2px}
  .menu-lines::after{bottom:0}

  .drawer{
    position:fixed;
    inset:0;
    background:var(--ink-800);
    color:var(--light);
    z-index:80;
    padding:26px 22px 32px;
    display:flex;
    flex-direction:column;
    transform:translateX(-100%);
    transition:transform 280ms var(--ease);
    overflow-y:auto;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
  .drawer-brand .brand-full{color:var(--light-muted)}
  .drawer-nav{margin-top:34px;display:flex;flex-direction:column;gap:6px}
  .drawer-nav .nav-item{
    font-size:21px;
    padding:14px 12px;
    border-left:2px solid transparent;
    color:#9AA2AE;
  }
  .drawer-nav .nav-num{font-size:13px}
  .drawer-foot{margin-top:auto;padding-top:28px}
  .drawer-foot .btn{width:100%}
  .drawer-note{margin-top:14px;font-size:12.5px;color:#7C848F;line-height:1.7}

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

  /* ---------- 按钮与链接 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    height:46px;
    padding:0 26px;
    border-radius:var(--radius);
    border:1px solid transparent;
    font-size:15px;
    font-weight:600;
    letter-spacing:.01em;
    cursor:pointer;
    transition:background-color 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),transform 220ms var(--ease),box-shadow 220ms var(--ease);
  }
  .btn-primary{background:var(--star);color:#FFFFFF}
  .btn-primary:hover{background:var(--star-deep);transform:translateY(-1px);box-shadow:0 8px 20px rgba(200,122,52,.24)}
  .btn-outline{background:transparent;border-color:var(--line);color:var(--text)}
  .btn-outline:hover{border-color:var(--star);color:var(--star)}
  .btn-outline-light{background:transparent;border-color:rgba(244,239,228,.26);color:var(--light)}
  .btn-outline-light:hover{border-color:var(--star);color:var(--star)}
  .sidebar-foot .btn{width:100%;height:42px;font-size:14px}
  .link-arrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:14.5px;font-weight:600;color:var(--teal);
    position:relative;
  }
  .link-arrow::after{content:"→";transition:transform 220ms var(--ease)}
  .link-arrow::before{
    content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;
    background:currentColor;transform:scaleX(0);transform-origin:left center;
    transition:transform 240ms var(--ease);
  }
  .link-arrow:hover{color:var(--star)}
  .link-arrow:hover::before{transform:scaleX(1)}
  .link-arrow:hover::after{transform:translateX(2px)}
  .tag{
    display:inline-flex;align-items:center;gap:7px;
    padding:5px 13px;border-radius:999px;
    background:rgba(51,96,92,.12);
    color:var(--teal);
    font-size:12.5px;font-weight:600;letter-spacing:.04em;
  }
  .tag-dot{width:5px;height:5px;border-radius:999px;background:var(--star);display:inline-block}

  /* ---------- 面包屑与首屏 ---------- */
  .crumb{
    display:flex;align-items:center;flex-wrap:wrap;gap:8px;
    padding:34px 0 0;
    font-size:13px;color:var(--muted);
  }
  .crumb a{color:var(--muted);transition:color 200ms var(--ease)}
  .crumb a:hover{color:var(--star)}
  .crumb .sep{color:#B9B1A2}
  .crumb .now{color:var(--text)}

  .hero{padding:26px 0 44px;border-bottom:1px solid var(--line)}
  .hero h1{
    font-family:var(--font-serif);
    font-size:clamp(28px,3.3vw,42px);
    line-height:1.28;
    font-weight:700;
    letter-spacing:.01em;
    margin-top:16px;
    max-width:900px;
  }
  .hero-sub{
    margin-top:18px;
    max-width:720px;
    font-size:16px;
    line-height:1.85;
    color:var(--muted);
  }
  .hero-meta{
    margin-top:30px;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    border-top:1px solid var(--line);
    padding-top:22px;
    gap:0;
  }
  .hero-meta-item{padding:0 24px;border-left:1px solid var(--line)}
  .hero-meta-item:first-child{padding-left:0;border-left:0}
  .hero-meta-num{
    font-family:var(--font-serif);
    font-size:30px;
    font-weight:600;
    color:var(--star);
    line-height:1.1;
  }
  .hero-meta-label{margin-top:6px;font-size:13.5px;color:var(--muted);line-height:1.6}

  /* ---------- 锚点双栏 ---------- */
  .anchor-layout{
    display:grid;
    grid-template-columns:220px minmax(0,1fr);
    gap:56px;
    padding:56px 0 72px;
    align-items:start;
  }
  .anchor-nav{
    position:sticky;
    top:36px;
    border-left:1px solid var(--line);
  }
  .anchor-title{
    font-size:12px;
    letter-spacing:.18em;
    color:var(--muted);
    padding:0 0 14px 16px;
  }
  .anchor-link{
    display:block;
    padding:10px 12px 10px 16px;
    font-size:14px;
    line-height:1.6;
    color:var(--muted);
    border-left:2px solid transparent;
    margin-left:-1px;
    transition:color 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease);
  }
  .anchor-link:hover{color:var(--text);background:rgba(200,122,52,.05)}
  .anchor-link.is-current{
    color:var(--text);
    font-weight:600;
    border-left-color:var(--star);
    background:rgba(200,122,52,.07);
  }

  /* ---------- 分节 ---------- */
  .sec{margin-bottom:64px;scroll-margin-top:96px}
  .sec:last-child{margin-bottom:0}
  .sec-head{display:flex;align-items:baseline;gap:14px}
  .sec-num{
    font-family:var(--font-serif);
    font-size:24px;
    font-weight:600;
    color:var(--star);
    line-height:1;
  }
  .sec h2{
    font-family:var(--font-serif);
    font-size:clamp(21px,2.3vw,28px);
    line-height:1.35;
    font-weight:700;
  }
  .sec-lead{
    margin:14px 0 24px;
    max-width:680px;
    font-size:15.5px;
    line-height:1.85;
    color:var(--muted);
  }
  .sec-figure{
    margin:0 0 26px;
    border-radius:var(--radius);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--paper-2);
  }
  .sec-figure img{
    width:100%;
    aspect-ratio:16/7;
    object-fit:cover;
    transition:transform 320ms var(--ease);
  }
  .sec-figure:hover img{transform:scale(1.03)}
  .sec-figure figcaption{
    padding:10px 16px;
    font-size:13px;
    color:var(--muted);
    border-top:1px solid var(--line);
    background:var(--card);
  }

  /* ---------- 折叠 ---------- */
  .acc{border-top:1px solid var(--line)}
  .acc-item{border-bottom:1px solid var(--line)}
  .acc-btn{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    padding:19px 2px;
    background:transparent;
    border:0;
    text-align:left;
    font-size:16px;
    font-weight:600;
    color:var(--text);
    cursor:pointer;
    transition:color 200ms var(--ease);
  }
  .acc-btn:hover{color:var(--star)}
  .acc-icon{
    flex:0 0 auto;
    width:20px;height:20px;
    display:inline-flex;align-items:center;justify-content:center;
    font-family:var(--font-sans);
    font-size:18px;font-weight:400;
    color:var(--muted);
    line-height:1;
    transition:color 200ms var(--ease),transform 240ms var(--ease);
  }
  .acc-item.is-open .acc-icon{color:var(--star)}
  .acc-item.is-open .acc-btn{color:var(--text)}
  .acc-panel{
    max-height:0;
    overflow:hidden;
    transition:max-height 260ms var(--ease);
  }
  .acc-panel-inner{
    padding:0 40px 22px 2px;
    font-size:15px;
    line-height:1.9;
    color:var(--muted);
    max-width:680px;
  }

  /* ---------- 清单 / 提示 ---------- */
  .checklist{
    margin-top:8px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:30px 32px;
    box-shadow:var(--shadow-sm);
  }
  .checklist-head{
    display:flex;align-items:baseline;justify-content:space-between;gap:16px;
    padding-bottom:16px;border-bottom:1px solid var(--line);
  }
  .checklist-head h3{font-family:var(--font-serif);font-size:19px;font-weight:700}
  .checklist-head span{font-size:13px;color:var(--muted)}
  .checklist-grid{
    margin-top:20px;
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px 32px;
  }
  .checklist-item{display:flex;gap:12px;font-size:14.5px;line-height:1.75;color:var(--text)}
  .check-mark{
    flex:0 0 auto;
    width:18px;height:18px;
    margin-top:4px;
    border:1px solid var(--star);
    border-radius:3px;
    color:var(--star);
    font-size:11px;
    display:inline-flex;align-items:center;justify-content:center;
    line-height:1;
  }
  .notice{
    margin-top:32px;
    padding:20px 24px;
    background:var(--paper-2);
    border-left:3px solid var(--star);
    border-radius:0 var(--radius) var(--radius) 0;
    font-size:14.5px;
    line-height:1.85;
    color:#3F444C;
  }
  .notice strong{color:var(--text)}

  /* ---------- 结尾 CTA ---------- */
  .cta-block{
    margin:8px 0 72px;
    background:var(--ink-900);
    color:var(--light);
    border-radius:var(--radius);
    padding:56px 48px;
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:36px;
    align-items:center;
  }
  .cta-block h2{
    font-family:var(--font-serif);
    font-size:clamp(22px,2.5vw,32px);
    line-height:1.35;
    font-weight:700;
  }
  .cta-block p{margin-top:12px;font-size:14.5px;line-height:1.8;color:var(--light-muted);max-width:560px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ---------- 页脚 ---------- */
  .site-footer{
    flex-shrink:0;
    background:var(--ink-900);
    color:var(--light-muted);
    padding:60px 0 28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:40px;
    padding-bottom:40px;
    border-bottom:1px solid var(--line-dark);
  }
  .footer-mark{
    font-family:var(--font-serif);
    font-size:22px;font-weight:700;letter-spacing:.14em;
    color:var(--light);
  }
  .footer-full{margin-top:8px;font-size:13px;color:#9AA2AE;letter-spacing:.04em}
  .footer-desc{margin-top:14px;font-size:13.5px;line-height:1.85;color:#8B939E;max-width:330px}
  .footer-col h4{
    font-size:13px;font-weight:600;letter-spacing:.1em;
    color:var(--light);margin-bottom:14px;
  }
  .footer-col li{font-size:13.5px;line-height:1.75;color:#8B939E;margin-bottom:9px}
  .footer-col a{transition:color 200ms var(--ease)}
  .footer-col a:hover{color:var(--light)}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
    padding-top:22px;font-size:12.5px;color:#78808B;
  }

  /* ---------- 响应式 ---------- */
  @media (min-width:1280px){
    :root{--sidebar-w:260px}
  }
  @media (max-width:1023px){
    .sidebar{display:none}
    .topbar{display:flex}
    .shell{margin-left:0;padding-top:64px}
    .page{padding:0 26px}
    .anchor-layout{grid-template-columns:1fr;gap:28px;padding:36px 0 56px}
    .anchor-nav{
      position:static;
      border-left:0;
      display:flex;
      gap:8px;
      overflow-x:auto;
      padding-bottom:6px;
      -webkit-overflow-scrolling:touch;
    }
    .anchor-title{display:none}
    .anchor-link{
      flex:0 0 auto;
      margin-left:0;
      white-space:nowrap;
      padding:8px 16px;
      border:1px solid var(--line);
      border-radius:999px;
      background:var(--card);
      font-size:13.5px;
    }
    .anchor-link.is-current{background:var(--ink-900);color:var(--light);border-color:var(--ink-900)}
    .sec{scroll-margin-top:80px}
    .cta-block{grid-template-columns:1fr;padding:44px 32px;gap:24px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .footer-desc{max-width:none}
  }
  @media (max-width:767px){
    .page{padding:0 20px}
    .hero{padding:18px 0 34px}
    .hero-meta{grid-template-columns:1fr;gap:16px;padding-top:18px}
    .hero-meta-item{padding:0;border-left:0;display:flex;align-items:baseline;gap:12px}
    .hero-meta-num{font-size:24px}
    .hero-meta-label{margin-top:0}
    .checklist{padding:24px 20px}
    .checklist-grid{grid-template-columns:1fr}
    .acc-panel-inner{padding-right:12px}
    .cta-block{padding:36px 24px}
  }
  @media (max-width:520px){
    .page{padding:0 16px}
    .hero h1{font-size:28px}
    .hero-sub{font-size:15px}
    .btn{width:100%}
    .cta-actions{width:100%}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;gap:6px}
    .sidebar-foot .btn{width:100%}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation:none !important;
      transition:none !important;
      scroll-behavior:auto !important;
    }
  }

/* roulang page: category2 */
:root{
  --ink-900:#0F1218;
  --ink-800:#171B23;
  --paper:#F7F4EE;
  --paper-2:#EFEAE0;
  --card:#FFFFFF;
  --line:#E3DCCD;
  --text:#191C22;
  --muted:#5B6169;
  --light:#F4EFE4;
  --light-muted:#A9AFB8;
  --star:#C87A34;
  --star-deep:#B26A2A;
  --teal:#33605C;
  --radius:4px;
  --shadow-card:0 1px 2px rgba(15,18,24,.04);
  --shadow-hover:0 10px 28px rgba(15,18,24,.08);
  --ease:cubic-bezier(.2,.7,.3,1);
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.no-scroll{overflow:hidden;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{list-style:none;margin:0;padding:0;}
h1,h2,h3,h4,p,figure{margin:0;}
time{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--star);outline-offset:2px;}

/* ============ 布局骨架 ============ */
.shell{display:flex;min-height:100vh;}

.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:228px;
  background:var(--ink-900);
  border-right:1px solid rgba(244,239,228,.08);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  padding:36px 24px 28px;
  z-index:40;
}
.sidebar-inner{display:flex;flex-direction:column;gap:38px;}
@media (min-width:1280px){
  .sidebar{width:260px;padding:44px 30px 32px;}
}
@media (max-width:1023px){
  .sidebar{display:none;}
}

.brand{display:block;}
.brand-mark{
  display:block;
  font-family:var(--serif);
  font-size:24px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--light);
}
.brand-full{
  display:block;
  margin-top:8px;
  font-size:12px;
  line-height:1.6;
  letter-spacing:.03em;
  color:var(--light-muted);
}

.nav-list{display:flex;flex-direction:column;gap:2px;}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 0;
  font-size:15px;
  color:var(--light-muted);
  transition:color .24s var(--ease);
}
.nav-item::before{
  content:"";
  position:absolute;
  left:-24px;
  top:50%;
  transform:translateY(-50%);
  width:2px;
  height:16px;
  background:transparent;
  transition:background .24s var(--ease);
}
.nav-item::after{
  content:"";
  position:absolute;
  left:0;
  bottom:4px;
  height:1px;
  width:0;
  background:rgba(244,239,228,.45);
  transition:width .24s var(--ease);
}
.nav-item:hover{color:var(--light);}
.nav-item:hover::after{width:100%;}
.nav-item.is-active{color:#FFFFFF;font-weight:600;}
.nav-item.is-active::before{background:var(--star);}
.nav-num{
  font-family:var(--serif);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--star);
  opacity:.8;
}
.nav-item.is-active .nav-num{opacity:1;font-weight:700;}
@media (min-width:1280px){
  .nav-item::before{left:-30px;}
}

.sidebar-foot{display:flex;flex-direction:column;gap:16px;}
.sidebar-sep{height:1px;background:rgba(244,239,228,.12);}
.sidebar-note{font-size:12px;line-height:1.7;color:rgba(169,175,184,.8);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 26px;
  border-radius:var(--radius);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-sm{height:42px;font-size:14px;padding:0 20px;}
.btn-primary{
  background:var(--star);
  border:1px solid var(--star);
  color:#FFFFFF;
}
.btn-primary:hover{
  background:var(--star-deep);
  border-color:var(--star-deep);
  transform:translateY(-1px);
}
.btn-outline{
  background:transparent;
  border:1px solid var(--line);
  color:var(--text);
}
.btn-outline:hover{border-color:var(--star);color:var(--star);}
.btn-outline-light{
  background:transparent;
  border:1px solid rgba(244,239,228,.26);
  color:var(--light);
}
.btn-outline-light:hover{
  border-color:var(--star);
  color:#FFFFFF;
  background:rgba(200,122,52,.14);
}

.main{
  flex:1;
  min-width:0;
  margin-left:228px;
  display:flex;
  flex-direction:column;
}
@media (min-width:1280px){
  .main{margin-left:260px;}
}
@media (max-width:1023px){
  .main{margin-left:0;padding-top:64px;}
}

.page{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
}
@media (max-width:1023px){
  .page{padding:0 28px;}
}
@media (max-width:639px){
  .page{padding:0 20px;}
}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  align-items:center;
  justify-content:space-between;
  padding:0 20px;
  background:rgba(15,18,24,.97);
  border-bottom:1px solid rgba(244,239,228,.1);
  z-index:50;
}
@media (max-width:1023px){
  .topbar{display:flex;}
}
.topbar-brand{display:flex;flex-direction:column;line-height:1.2;}
.topbar-brand .mark{
  font-family:var(--serif);
  font-size:19px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--light);
}
.topbar-brand .full{
  margin-top:4px;
  font-size:10px;
  letter-spacing:.02em;
  color:var(--light-muted);
}
.menu-btn{
  width:42px;height:42px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid rgba(244,239,228,.2);
  border-radius:var(--radius);
  transition:border-color .2s var(--ease);
}
.menu-btn:hover{border-color:var(--star);}
.menu-btn span{display:block;width:18px;height:1px;background:var(--light);}

.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(15,18,24,.62);
  opacity:0;
  pointer-events:none;
  transition:opacity .28s var(--ease);
  z-index:60;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:min(86vw,360px);
  display:flex;
  flex-direction:column;
  gap:28px;
  padding:28px 24px 36px;
  background:var(--ink-800);
  transform:translateX(100%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
  z-index:70;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.drawer-title{
  font-family:var(--serif);
  font-size:18px;
  color:var(--light);
  letter-spacing:.06em;
}
.drawer-close{
  width:38px;height:38px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(244,239,228,.2);
  border-radius:var(--radius);
  color:var(--light);
  font-size:13px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.drawer-close:hover{border-color:var(--star);color:var(--star);}
.drawer .nav-item{font-size:20px;padding:14px 0;}
.drawer .nav-item::before{left:-16px;height:20px;}
.drawer .nav-num{font-size:13px;}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;}
.drawer-foot p{font-size:12px;line-height:1.7;color:rgba(169,175,184,.85);}

/* ============ 页面头部 ============ */
.page-head{
  padding:64px 0 40px;
  border-bottom:1px solid var(--line);
}
@media (min-width:1024px){
  .page-head{padding:88px 0 48px;}
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:26px;
  font-size:13px;
  color:var(--muted);
}
.breadcrumb a{transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--star);}
.breadcrumb .sep{color:#C6BDA9;}
.breadcrumb .current{color:var(--text);}
.page-title{
  font-family:var(--serif);
  font-size:34px;
  line-height:1.24;
  font-weight:700;
  letter-spacing:.01em;
  max-width:900px;
}
@media (min-width:1024px){
  .page-title{font-size:44px;line-height:1.18;}
}
.page-lead{
  margin-top:18px;
  max-width:730px;
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
}
@media (min-width:1024px){
  .page-lead{font-size:17px;}
}
.head-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-top:26px;
  font-size:13px;
  color:var(--muted);
}
.head-meta .dot{
  width:5px;height:5px;
  border-radius:50%;
  background:var(--star);
  display:inline-block;
}

/* ============ 板块 ============ */
.section{padding:64px 0;}
@media (min-width:1024px){
  .section{padding:88px 0;}
}
.section-lined{border-top:1px solid var(--line);}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:36px;
}
.section-title{
  font-family:var(--serif);
  font-size:25px;
  line-height:1.32;
  font-weight:700;
  letter-spacing:.01em;
}
@media (min-width:1024px){
  .section-title{font-size:32px;}
}
.section-sub{
  margin-top:10px;
  font-size:14px;
  color:var(--muted);
  max-width:560px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--teal);
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--star);
}

/* ============ 主推不对称网格 ============ */
.news-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
}
@media (min-width:1024px){
  .news-grid{
    grid-template-columns:minmax(0,2fr) minmax(0,1fr);
    gap:40px;
    align-items:start;
  }
}

.media{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#1B202A 0%,#0F1218 100%);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.lead-media{aspect-ratio:16/9;}

.lead-card{
  display:block;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.lead-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(200,122,52,.35);
}
.lead-card:hover .media img{transform:scale(1.03);}
.lead-body{padding:26px 28px 28px;}
@media (max-width:639px){
  .lead-body{padding:20px 18px 22px;}
}
.card-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-bottom:16px;
}
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  background:rgba(51,96,92,.1);
  color:var(--teal);
}
.meta-time{font-size:13px;color:var(--muted);}
.lead-title{
  font-family:var(--serif);
  font-size:23px;
  line-height:1.42;
  font-weight:700;
  transition:color .2s var(--ease);
}
@media (min-width:1024px){
  .lead-title{font-size:27px;}
}
.lead-card:hover .lead-title{color:var(--star);}
.lead-excerpt{
  margin-top:14px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.clamp-2{
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.list-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:10px 22px;
  box-shadow:var(--shadow-card);
}
.list-card-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 0 12px;
  border-bottom:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
  letter-spacing:.04em;
}
.short-list li + li{border-top:1px solid var(--line);}
.short-item{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  padding:17px 0;
  transition:transform .2s var(--ease);
}
.short-item:hover{transform:translateX(2px);}
.short-title{
  font-size:15px;
  line-height:1.6;
  font-weight:500;
  transition:color .2s var(--ease);
}
.short-item:hover .short-title{color:var(--star);}
.short-item time{
  flex:none;
  padding-top:3px;
  font-size:12px;
  color:var(--muted);
}

/* ============ 中等卡片网格 ============ */
.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
}
@media (min-width:640px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(200,122,52,.35);
}
.card:hover .media img{transform:scale(1.03);}
.card-media{aspect-ratio:16/10;}
.card-body{
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:22px 22px 24px;
  flex:1;
}
.card-title{
  font-family:var(--serif);
  font-size:20px;
  line-height:1.45;
  font-weight:700;
  transition:color .2s var(--ease);
}
.card:hover .card-title{color:var(--star);}
.card-desc{
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--teal);
  position:relative;
  transition:color .2s var(--ease);
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-3px;
  height:1px;
  width:0;
  background:currentColor;
  transition:width .24s var(--ease);
}
.link-arrow:hover{color:var(--star);}
.link-arrow:hover::after{width:calc(100% - 16px);}
.link-arrow .arrow{
  display:inline-block;
  transition:transform .2s var(--ease);
}
.link-arrow:hover .arrow{transform:translateX(2px);}

/* ============ 深色信息面板 ============ */
.hud{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:var(--light);
  border-radius:var(--radius);
  padding:44px 26px;
}
@media (min-width:1024px){
  .hud{padding:64px 56px;}
}
.hud::before{
  content:"";
  position:absolute;
  top:-60px;right:-40px;
  width:220px;height:220px;
  background:radial-gradient(circle,rgba(200,122,52,.22) 0%,rgba(200,122,52,0) 70%);
  pointer-events:none;
}
.hud-title{
  font-family:var(--serif);
  font-size:25px;
  line-height:1.35;
  font-weight:700;
  color:var(--light);
  max-width:640px;
}
@media (min-width:1024px){
  .hud-title{font-size:32px;}
}
.hud-sub{
  margin-top:12px;
  font-size:14px;
  line-height:1.8;
  color:var(--light-muted);
  max-width:600px;
}
.hud-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  margin-top:36px;
  border-top:1px solid rgba(244,239,228,.14);
}
@media (min-width:768px){
  .hud-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
.hud-item{
  display:flex;
  gap:18px;
  padding:24px 0;
  border-bottom:1px solid rgba(244,239,228,.14);
}
@media (min-width:768px){
  .hud-item{padding:28px 28px 28px 0;}
  .hud-item:nth-child(even){padding-left:32px;border-left:1px solid rgba(244,239,228,.14);}
}
.hud-num{
  flex:none;
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  color:var(--star);
  line-height:1.4;
}
.hud-item h3{
  font-size:17px;
  font-weight:600;
  color:var(--light);
  margin-bottom:6px;
}
.hud-item p{
  font-size:14px;
  line-height:1.8;
  color:var(--light-muted);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;}
.faq{}
.acc-item{border-top:1px solid var(--line);}
.acc-item:last-child{border-bottom:1px solid var(--line);}
.acc-btn{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:22px 0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  line-height:1.6;
  color:var(--text);
  transition:color .2s var(--ease);
}
@media (min-width:1024px){
  .acc-btn{font-size:17px;padding:24px 0;}
}
.acc-btn:hover{color:var(--star);}
.acc-icon{
  position:relative;
  flex:none;
  width:14px;
  height:14px;
}
.acc-icon::before,
.acc-icon::after{
  content:"";
  position:absolute;
  background:var(--star);
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.acc-icon::before{left:0;top:6px;width:14px;height:1px;}
.acc-icon::after{left:6px;top:0;width:1px;height:14px;}
.acc-btn[aria-expanded="true"] .acc-icon::after{transform:rotate(90deg);opacity:0;}
.acc-panel{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s var(--ease);
}
.acc-panel-inner{
  padding:0 0 24px;
  max-width:660px;
  font-size:15px;
  line-height:1.9;
  color:var(--muted);
}

/* ============ 结尾 CTA ============ */
.cta{
  background:var(--ink-900);
  color:var(--light);
  border-radius:var(--radius);
  padding:44px 26px;
  position:relative;
  overflow:hidden;
}
@media (min-width:1024px){
  .cta{padding:64px 56px;}
}
.cta h2{
  font-family:var(--serif);
  font-size:26px;
  line-height:1.36;
  font-weight:700;
  color:var(--light);
  max-width:640px;
}
@media (min-width:1024px){
  .cta h2{font-size:34px;}
}
.cta p{
  margin-top:14px;
  font-size:15px;
  line-height:1.85;
  color:var(--light-muted);
  max-width:560px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:22px;
  margin-top:30px;
}
.cta-link{
  font-size:14px;
  font-weight:600;
  color:var(--light);
  border-bottom:1px solid rgba(244,239,228,.32);
  padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.cta-link:hover{color:var(--star);border-color:var(--star);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  color:var(--light-muted);
  padding:56px 0 26px;
  margin-top:auto;
}
@media (min-width:1024px){
  .site-footer{padding:72px 0 30px;}
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;}
}
.footer-mark{
  display:block;
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--light);
}
.footer-full{
  margin-top:8px;
  font-size:13px;
  color:var(--light);
  letter-spacing:.02em;
}
.footer-desc{
  margin-top:14px;
  max-width:350px;
  font-size:14px;
  line-height:1.8;
  color:rgba(169,175,184,.9);
}
.footer-col h4{
  margin-bottom:14px;
  font-size:14px;
  font-weight:600;
  color:var(--light);
  letter-spacing:.04em;
}
.footer-col li{
  margin-bottom:10px;
  font-size:14px;
  line-height:1.7;
  color:rgba(169,175,184,.9);
}
.footer-col a{transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--light);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid rgba(244,239,228,.12);
  font-size:13px;
  color:rgba(169,175,184,.8);
}

/* ============ 动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:.01ms !important;
    animation-duration:.01ms !important;
  }
  .reveal{opacity:1;transform:none;}
}