/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --brand:#0E9F8E;
  --brand-dark:#0A7C6F;
  --accent:#F2622E;
  --lime:#C9E265;
  --ink:#12211E;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E8E1D8;
  --text:#1C2321;
  --muted:#5A6560;
  --faint:#8C948F;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh1:0 1px 2px rgba(18,33,30,.06),0 8px 24px rgba(18,33,30,.08);
  --sh2:0 12px 32px rgba(18,33,30,.12);
  --sec-y:96px;
}
@media (max-width:767px){ :root{ --sec-y:56px; } }

/* ============ 基础 reset ============ */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:96px; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;color:inherit;}
time{font-variant-numeric:tabular-nums;}
:focus-visible{outline:3px solid rgba(14,159,142,.35);outline-offset:2px;border-radius:6px;}
@media (max-width:1023px){ body{ padding-bottom:88px; } }
@media (prefers-reduced-motion:reduce){
  *{ transition:none !important; animation:none !important; scroll-behavior:auto !important; }
}

/* ============ 容器 ============ */
.shell{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:768px){ .shell{ padding-left:32px; padding-right:32px; } }

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:16px;
  font-weight:600;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:active{ transform:scale(.98); }
.btn-sm{ min-height:40px; padding:0 18px; font-size:15px; }
.btn-primary{ background:var(--brand); color:#fff; }
.btn-primary:hover{ background:var(--brand-dark); transform:translateY(-2px); box-shadow:0 10px 24px rgba(14,159,142,.28); }
.btn-outline{ background:transparent; border-color:var(--ink); color:var(--ink); }
.btn-outline:hover{ background:var(--ink); color:#fff; transform:translateY(-2px); }
.btn-on-dark{ background:transparent; border-color:rgba(255,255,255,.58); color:#fff; }
.btn-on-dark:hover{ background:#fff; border-color:#fff; color:var(--ink); transform:translateY(-2px); }
.arrow-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
}
.arrow-link i{ transition:transform .18s ease; }
.arrow-link:hover i{ transform:translateX(4px); }

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(251,248,244,.9);
  backdrop-filter:saturate(140%) blur(8px);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:0 6px 20px rgba(18,33,30,.07);
}
.hd-inner{ display:flex; align-items:center; justify-content:space-between; gap:20px; height:68px; }
@media (min-width:1024px){ .hd-inner{ height:80px; } }
.logo{ display:flex; align-items:center; gap:10px; color:var(--ink); font-size:18px; font-weight:800; letter-spacing:-.01em; }
.logo-mark{ display:inline-flex; flex:0 0 auto; }
.logo-sub{
  margin-left:6px;
  padding:2px 9px;
  font-size:12px;
  font-weight:600;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
}
@media (max-width:519px){ .logo-sub{ display:none; } }
.main-nav{ display:none; }
@media (min-width:1024px){ .main-nav{ display:flex; align-items:center; gap:6px; } }
.nav-link{
  position:relative;
  padding:10px 14px;
  border-radius:10px;
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{ color:var(--ink); background:rgba(14,159,142,.07); }
.nav-link.is-active{ color:var(--brand); }
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px; right:14px; bottom:2px;
  height:2px; border-radius:2px;
  background:var(--brand);
}
.hd-actions{ display:flex; align-items:center; gap:10px; }
.hd-actions .btn-primary{ display:none; }
@media (min-width:768px){ .hd-actions .btn-primary{ display:inline-flex; } }
.icon-btn{
  width:42px; height:42px;
  display:inline-flex; align-items:center; justify-content:center;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  color:var(--muted);
  transition:color .18s ease,border-color .18s ease,transform .18s ease;
}
.icon-btn:hover{ color:var(--brand); border-color:var(--brand); transform:translateY(-1px); }

/* ============ Hero ============ */
.hero{ position:relative; overflow:hidden; background:var(--ink); color:#fff; padding:76px 0 64px; }
@media (min-width:1024px){ .hero{ padding:118px 0 100px; } }
.hero-bg{
  position:absolute; inset:0;
  background-position:center;
  background-size:cover;
  opacity:.34;
  transform:scale(1.02);
}
.hero-veil{
  position:absolute; inset:0;
  background:linear-gradient(102deg,rgba(18,33,30,.95) 0%,rgba(18,33,30,.78) 46%,rgba(18,33,30,.42) 100%);
}
.hero-inner{ position:relative; z-index:2; max-width:840px; }
.hero-eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  margin-bottom:20px;
  padding:6px 14px;
  font-size:13px;
  letter-spacing:.14em;
  color:#9FE8DC;
  border:1px solid rgba(159,232,220,.35);
  border-radius:999px;
}
.hero-title{
  font-size:28px;
  line-height:1.32;
  font-weight:800;
  letter-spacing:-.01em;
}
@media (min-width:768px){ .hero-title{ font-size:40px; line-height:1.25; } }
.hero-sub{
  margin-top:18px;
  font-size:17px;
  line-height:1.8;
  color:rgba(255,255,255,.82);
  max-width:560px;
}
.hero-cta{ display:flex; flex-wrap:wrap; gap:14px; margin-top:30px; }
.hero-tags{ display:flex; flex-wrap:wrap; gap:10px; margin-top:34px; }
.hero-tags li{
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 14px;
  font-size:13px;
  color:rgba(255,255,255,.88);
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);
  border-radius:999px;
}
.hero-tags i{ color:var(--lime); }
.hero-deco{
  position:absolute;
  right:-140px; bottom:-180px;
  width:520px; height:520px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.13);
  pointer-events:none;
}
.hero-deco::after{
  content:"";
  position:absolute; inset:64px;
  border-radius:50%;
  border:1px solid rgba(242,98,46,.26);
}

/* ============ 板块通用 ============ */
.section{ padding:var(--sec-y) 0; }
.section--alt{ background:#fff; }
.sec-head{ max-width:700px; margin-bottom:40px; }
.sec-eyebrow{ margin-bottom:12px; font-size:13px; font-weight:700; letter-spacing:.16em; color:var(--accent); }
.sec-head h2{ font-size:26px; line-height:1.35; font-weight:700; letter-spacing:-.01em; color:var(--ink); }
@media (min-width:768px){ .sec-head h2{ font-size:30px; } }
.sec-desc{ margin-top:12px; font-size:16px; color:var(--muted); }
.badge{
  display:inline-flex; align-items:center;
  padding:4px 12px;
  font-size:12px;
  font-weight:700;
  color:var(--brand-dark);
  background:rgba(14,159,142,.1);
  border-radius:999px;
}

/* ============ 主题封面区 ============ */
.cover-grid{ display:grid; gap:20px; }
@media (min-width:900px){
  .cover-grid{ grid-template-columns:1.55fr 1fr; grid-template-rows:repeat(2,minmax(0,1fr)); gap:24px; }
}
.cover-card{
  position:relative;
  display:block;
  overflow:hidden;
  min-height:210px;
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.cover-card img{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  transition:transform .45s ease;
}
.cover-card::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(180deg,rgba(18,33,30,.02) 30%,rgba(18,33,30,.72) 68%,rgba(18,33,30,.9) 100%);
  transition:background .2s ease;
}
.cover-card:hover{ transform:translateY(-3px); box-shadow:var(--sh2); }
.cover-card:hover img{ transform:scale(1.04); }
.cover-card--main{ min-height:340px; }
@media (min-width:900px){
  .cover-card--main{ grid-row:span 2; min-height:470px; }
}
.cover-badge{
  position:absolute; top:16px; left:16px; z-index:3;
  padding:5px 12px;
  font-size:12px; font-weight:700;
  color:#fff;
  background:var(--accent);
  border-radius:999px;
}
.cover-body{ position:absolute; left:20px; right:56px; bottom:20px; z-index:3; color:#fff; }
.cover-body h3{ font-size:18px; line-height:1.45; font-weight:700; }
.cover-card--main .cover-body h3{ font-size:22px; }
@media (min-width:900px){ .cover-card--main .cover-body h3{ font-size:26px; } }
.cover-body p{ margin-top:8px; font-size:14px; line-height:1.7; color:rgba(255,255,255,.8); }
.cover-arrow{
  position:absolute; right:20px; bottom:22px; z-index:3;
  font-size:20px; color:#fff;
  transition:transform .2s ease;
}
.cover-card:hover .cover-arrow{ transform:translateX(4px); }

/* ============ 合集目录区 ============ */
.toc-wrap{ display:grid; gap:26px; }
@media (min-width:1024px){ .toc-wrap{ grid-template-columns:1.55fr 1fr; align-items:start; gap:32px; } }
.toc-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh1);
}
.toc-row{
  position:relative;
  display:flex;
  align-items:center;
  gap:18px;
  padding:19px 22px;
  border-bottom:1px solid var(--line);
  transition:background .18s ease;
}
.toc-row:last-child{ border-bottom:0; }
.toc-row::before{
  content:"";
  position:absolute; left:0; top:0; bottom:0;
  width:3px;
  background:var(--brand);
  transform:scaleY(0);
  transition:transform .18s ease;
}
.toc-row:hover{ background:var(--bg); }
.toc-row:hover::before{ transform:scaleY(1); }
.toc-num{
  min-width:32px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:15px; font-weight:700;
  color:var(--brand);
}
.toc-main{ flex:1; min-width:0; }
.toc-name{ display:block; font-size:17px; font-weight:700; color:var(--ink); }
.toc-desc{ display:block; margin-top:2px; font-size:13px; color:var(--muted); }
.toc-arrow{ color:var(--faint); transition:transform .18s ease,color .18s ease; }
.toc-row:hover .toc-arrow{ transform:translateX(4px); color:var(--brand); }
.toc-preview{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:14px;
  box-shadow:var(--sh1);
}
.toc-preview img{ width:100%; aspect-ratio:4/3; object-fit:cover; border-radius:var(--r-img); }
.toc-preview p{ margin-top:12px; font-size:14px; line-height:1.7; color:var(--muted); }
@media (min-width:1024px){ .toc-preview{ position:sticky; top:104px; } }

/* ============ 精选条目区 ============ */
.feat-grid{ display:grid; gap:20px; }
@media (min-width:900px){ .feat-grid{ grid-template-columns:1.35fr 1fr; gap:24px; } }
.feat-stack{ display:grid; gap:20px; }
.feat-card{
  display:block;
  overflow:hidden;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.feat-card:hover{ transform:translateY(-3px); box-shadow:var(--sh2); border-color:rgba(14,159,142,.35); }
.feat-card img{ width:100%; aspect-ratio:16/10; object-fit:cover; }
.feat-card--main img{ aspect-ratio:16/9; }
.feat-body{ padding:22px; }
.feat-body h3{ margin-top:12px; font-size:18px; line-height:1.45; font-weight:700; color:var(--ink); }
.feat-card--main .feat-body h3{ font-size:24px; }
.feat-body p{
  margin-top:10px;
  font-size:15px;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.feat-meta{ display:flex; align-items:center; gap:10px; margin-top:16px; font-size:13px; color:var(--faint); }

/* ============ 最新信息区 ============ */
.news-wrap{ display:grid; gap:24px; }
@media (min-width:1024px){ .news-wrap{ grid-template-columns:1fr 280px; align-items:start; gap:40px; } }
.news-list{ display:grid; gap:14px; }
@media (min-width:1024px){ .news-list{ grid-template-columns:1fr 1fr; gap:18px; } }
.news-item{
  display:block;
  padding:20px 22px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.news-item:hover{ transform:translateY(-2px); box-shadow:var(--sh2); border-color:rgba(14,159,142,.4); }
.news-meta{ display:flex; align-items:center; gap:12px; font-size:13px; color:var(--faint); }
.news-title{ margin-top:10px; font-size:18px; line-height:1.5; font-weight:700; color:var(--ink); }
.news-summary{
  margin-top:8px;
  font-size:15px;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-empty{
  padding:36px 26px;
  text-align:center;
  background:var(--surface);
  border:1px dashed var(--line);
  border-radius:var(--r-card);
}
.news-empty p{ font-size:15px; color:var(--muted); margin-bottom:16px; }
.news-side{
  padding:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
}
.news-side img{ width:100%; aspect-ratio:4/3; object-fit:cover; border-radius:var(--r-img); }
.news-side h3{ margin-top:16px; font-size:18px; font-weight:700; color:var(--ink); }
.news-side p{ margin-top:8px; font-size:14px; line-height:1.75; color:var(--muted); }
.news-side .btn{ margin-top:18px; width:100%; }

/* ============ 相关推荐横滑 ============ */
.rail-header{ display:flex; align-items:flex-end; justify-content:space-between; gap:16px; margin-bottom:24px; }
.rail{
  display:flex;
  gap:18px;
  overflow-x:auto;
  padding:4px 4px 18px;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{ height:6px; }
.rail::-webkit-scrollbar-track{ background:var(--line); border-radius:999px; }
.rail::-webkit-scrollbar-thumb{ background:var(--brand); border-radius:999px; }
.rail-card{
  flex:0 0 78%;
  scroll-snap-align:start;
  overflow:hidden;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
  transition:transform .18s ease,box-shadow .18s ease;
}
@media (min-width:640px){ .rail-card{ flex:0 0 46%; } }
@media (min-width:1024px){ .rail-card{ flex:0 0 calc((100% - 54px) / 4); } }
.rail-card:hover{ transform:translateY(-3px); box-shadow:var(--sh2); }
.rail-card img{ width:100%; aspect-ratio:16/11; object-fit:cover; }
.rail-body{ padding:16px; }
.rail-body h3{ font-size:16px; line-height:1.45; font-weight:700; color:var(--ink); }
.rail-body p{ margin-top:8px; font-size:13px; color:var(--muted); }

/* ============ 收藏 / 分享 CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:34px 26px;
  background:var(--ink);
  border-radius:20px;
  color:#fff;
}
.cta-band::before{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(45deg,rgba(14,159,142,.32),rgba(242,98,46,.22));
}
@media (min-width:768px){ .cta-band{ padding:46px 48px; } }
.cta-inner{ position:relative; z-index:2; display:grid; gap:24px; }
@media (min-width:768px){ .cta-inner{ grid-template-columns:1fr auto; align-items:center; } }
.cta-title{ font-size:22px; font-weight:800; letter-spacing:-.01em; }
@media (min-width:768px){ .cta-title{ font-size:26px; } }
.cta-note{ margin-top:10px; font-size:14px; line-height:1.75; color:rgba(255,255,255,.74); max-width:460px; }
.cta-actions{ display:flex; flex-wrap:wrap; gap:12px; }

/* ============ FAQ ============ */
.faq-list{ display:grid; gap:12px; }
@media (min-width:900px){ .faq-list{ grid-template-columns:1fr 1fr; gap:16px; } }
.faq-item{
  padding:0 22px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh1);
  transition:border-color .18s ease;
}
.faq-item[open]{ border-color:rgba(14,159,142,.42); }
.faq-item summary{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:20px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  font-size:20px;
  font-weight:400;
  color:var(--brand);
  transition:transform .18s ease;
}
.faq-item[open] summary::after{ transform:rotate(45deg); }
.faq-item p{ padding:0 0 20px; font-size:15px; line-height:1.8; color:var(--muted); }

/* ============ 页脚 ============ */
.site-footer{ background:var(--ink); color:rgba(255,255,255,.7); padding:60px 0 36px; }
@media (min-width:1024px){ .site-footer{ padding:72px 0 40px; } }
.footer-grid{ display:grid; gap:34px; }
@media (min-width:768px){ .footer-grid{ grid-template-columns:1.5fr 1fr 1fr 1.1fr; gap:40px; } }
.footer-brand{ display:flex; align-items:center; gap:10px; color:#fff; font-size:19px; font-weight:800; }
.footer-desc{ margin-top:14px; max-width:320px; font-size:14px; line-height:1.8; }
.footer-col h4{ margin-bottom:16px; font-size:15px; font-weight:600; color:#fff; }
.footer-col ul{ display:grid; gap:10px; }
.footer-col a{ font-size:14px; color:rgba(255,255,255,.7); }
.footer-col a:hover{ color:var(--brand); }
.footer-contact{ margin-top:14px; display:grid; gap:8px; font-size:14px; }
.footer-contact span{ display:inline-flex; align-items:center; gap:8px; }
.footer-contact i{ color:var(--brand); }
.footer-bottom{
  margin-top:46px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ============ 移动端底部 Tab ============ */
.tabbar{
  position:fixed;
  left:0; right:0; bottom:0;
  z-index:90;
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(18,33,30,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{ display:grid; grid-template-columns:repeat(3,1fr); height:56px; }
.tab-item{
  position:relative;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:3px;
  font-size:11px;
  color:var(--faint);
  transition:color .18s ease;
}
.tab-item i{ font-size:20px; }
.tab-item.is-active{ color:var(--brand); }
.tab-item.is-active::before{
  content:"";
  position:absolute; top:0; left:50%;
  transform:translateX(-50%);
  width:26px; height:2px;
  border-radius:2px;
  background:var(--brand);
}
@media (min-width:1024px){ .tabbar{ display:none; } }

/* ============ 轻提示 ============ */
.toast{
  position:fixed;
  left:50%; bottom:88px;
  transform:translateX(-50%) translateY(12px);
  z-index:120;
  padding:12px 22px;
  font-size:14px;
  color:#fff;
  background:rgba(18,33,30,.94);
  border-radius:999px;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
}
.toast.is-show{ opacity:1; transform:translateX(-50%) translateY(0); }

/* roulang page: article */
:root{
  --brand:#0E9F8E;
  --brand-dark:#0A7C6F;
  --accent:#F2622E;
  --lime:#C9E265;
  --ink:#12211E;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E8E1D8;
  --text:#1C2321;
  --muted:#5A6560;
  --faint:#8C948F;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,33,30,.06), 0 8px 24px rgba(18,33,30,.08);
  --shadow-hover:0 12px 32px rgba(18,33,30,.12);
  --shell:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0 0 1.25em}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(14,159,142,.35);outline-offset:2px;border-radius:8px}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px}
@media(min-width:768px){.shell{padding:0 32px}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:background-color .18s ease,color .18s ease,transform .15s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(14,159,142,.22)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-primary:active{transform:scale(.98)}
.btn-outline{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--lime);color:var(--ink)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-ghost{background:none;color:var(--brand);padding:0;min-height:0;font-weight:600}
.btn-ghost i{transition:transform .18s ease}
.btn-ghost:hover i{transform:translateX(4px)}

.icon-btn{
  width:40px;height:40px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink);border:1px solid var(--line);background:rgba(255,255,255,.7);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.icon-btn:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(251,248,244,.78);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.88);border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(18,33,30,.05)}
.hd-inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.logo-mark{display:inline-flex}
.logo-sub{font-size:12px;font-weight:600;color:var(--brand);margin-left:6px;letter-spacing:.08em}
.main-nav{display:none;margin-left:auto;gap:6px}
.nav-link{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:999px;
  font-size:15px;color:var(--muted);transition:color .18s ease,background-color .18s ease;
}
.nav-link:hover{color:var(--ink);background:rgba(14,159,142,.08)}
.nav-link.is-active{color:var(--brand);background:rgba(14,159,142,.1);font-weight:600}
.hd-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.hd-actions .btn{display:none}
@media(min-width:1024px){
  .main-nav{display:flex}
  .hd-actions{margin-left:0}
  .hd-actions .btn{display:inline-flex}
}

/* ---------- mobile tab bar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:grid;grid-template-columns:repeat(3,1fr);
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar a{
  position:relative;height:58px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--muted);
}
.tabbar a i{font-size:19px}
.tabbar a.is-active{color:var(--brand);font-weight:600}
.tabbar a.is-active::before{content:"";position:absolute;top:0;width:26px;height:2px;border-radius:2px;background:var(--brand)}
@media(min-width:1024px){.tabbar{display:none}}
body{padding-bottom:72px}
@media(min-width:1024px){body{padding-bottom:0}}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:13.5px;color:var(--faint)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--line)}
.crumb .now{color:var(--faint);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:640px){.crumb .now{max-width:20ch}}

/* ---------- article head ---------- */
.art-head{padding:26px 0 34px;border-bottom:1px solid var(--line)}
.art-cat{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(14,159,142,.12);color:var(--brand);
  font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;
}
.art-head h1{font-size:28px;line-height:1.3;margin:16px 0 18px;max-width:20ch}
@media(min-width:768px){.art-head h1{font-size:38px;line-height:1.25;max-width:26ch}}
.art-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--muted)}
.art-meta span{display:inline-flex;align-items:center;gap:7px}
.art-meta i{color:var(--brand);font-size:13px}

/* ---------- layout ---------- */
.art-layout{padding:40px 0 72px}
.art-cols{display:grid;grid-template-columns:minmax(0,1fr);gap:48px}
@media(min-width:1280px){
  .art-cols{grid-template-columns:minmax(0,780px) 250px;justify-content:center}
}

/* ---------- entry figure ---------- */
.art-figure{margin:0 0 36px;border-radius:var(--r-card);overflow:hidden;background:var(--surface);border:1px solid var(--line)}
.art-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.art-figure figcaption{padding:10px 16px;font-size:13px;color:var(--faint);border-top:1px solid var(--line)}

/* ---------- article body ---------- */
.article-body{font-size:17px;line-height:1.9;color:var(--text)}
.article-body>*:first-child{margin-top:0}
.article-body h2{font-size:24px;margin:48px 0 18px;padding-left:14px;border-left:4px solid var(--brand)}
@media(min-width:768px){.article-body h2{font-size:29px}}
.article-body h3{font-size:21px;margin:34px 0 14px}
.article-body h4{font-size:18px;margin:26px 0 12px;color:var(--ink)}
.article-body p{margin:0 0 1.3em}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(14,159,142,.35)}
.article-body a:hover{color:var(--brand-dark);border-bottom-color:var(--brand-dark)}
.article-body strong{color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.3em}
.article-body ul{list-style:none;padding-left:0}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:8px}
.article-body ul li::before{content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand)}
.article-body ol{list-style:decimal}
.article-body ol li{margin-bottom:8px;padding-left:4px}
.article-body ol li::marker{color:var(--brand);font-weight:700}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;background:rgba(14,159,142,.06);
  border-left:4px solid var(--brand);border-radius:0 12px 12px 0;color:var(--muted);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:26px 0;width:100%}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--faint);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15.5px;display:block;overflow-x:auto;white-space:nowrap}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:rgba(14,159,142,.08);color:var(--ink);font-weight:600}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:rgba(18,33,30,.06);padding:2px 6px;border-radius:6px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* ---------- empty state ---------- */
.art-empty{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:40px 28px;text-align:center;box-shadow:var(--shadow-sm);
}
.art-empty img{width:100%;max-width:320px;margin:0 auto 22px;border-radius:var(--r-img);aspect-ratio:4/3;object-fit:cover}
.art-empty h2{font-size:22px;margin-bottom:10px}
.art-empty p{color:var(--muted);max-width:46ch;margin:0 auto 22px}

/* ---------- tags & share ---------- */
.art-foot{margin-top:44px;padding-top:26px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;align-items:center}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;
  background:#fff;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--muted);
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.tag:hover{border-color:var(--brand);color:var(--brand);background:rgba(14,159,142,.06)}
.share-row{display:flex;gap:10px}

/* ---------- aside ---------- */
.art-aside{display:none}
@media(min-width:1280px){.art-aside{display:block}}
.aside-card{
  position:sticky;top:100px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-sm);
}
.aside-card h3{font-size:15px;letter-spacing:.04em;color:var(--muted);font-weight:600;margin-bottom:14px}
.aside-list li{display:flex;gap:10px;font-size:14px;color:var(--muted);padding:9px 0;border-bottom:1px dashed var(--line)}
.aside-list li:last-child{border-bottom:0}
.aside-list b{color:var(--brand);font-family:ui-monospace,Menlo,monospace;font-size:13px}
.aside-share{display:grid;gap:10px;margin-top:18px}

/* ---------- related ---------- */
.section{padding:64px 0}
@media(min-width:768px){.section{padding:88px 0}}
.sec-head{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;justify-content:space-between;margin-bottom:28px}
.sec-head h2{font-size:24px}
@media(min-width:768px){.sec-head h2{font-size:30px}}
.sec-head p{color:var(--muted);font-size:15px;margin:8px 0 0}
.sec-kicker{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--accent);text-transform:uppercase}

.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.card-thumb{position:relative;overflow:hidden}
.card-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:19px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:15px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--faint)}
.badge{background:rgba(14,159,142,.12);color:var(--brand);font-size:12.5px;font-weight:600;padding:4px 11px;border-radius:999px}

/* ---------- dark cta ---------- */
.cta-band{background:var(--ink);border-radius:20px;padding:34px 26px;color:#fff;display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}
.cta-band h2{color:#fff;font-size:22px;margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.7);font-size:15px;margin:0;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn-outline{border-color:rgba(255,255,255,.6);color:#fff}
.cta-band .btn-outline:hover{background:#fff;color:var(--ink);border-color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:56px 0 26px;margin-top:24px;font-size:15px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-desc{font-size:14.5px;line-height:1.8;max-width:34ch;margin:0}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,.7);transition:color .18s ease}
.footer-col a:hover{color:var(--brand)}
.footer-contact{display:grid;gap:10px;font-size:14.5px}
.footer-contact i{color:var(--brand);width:18px}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}

@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --brand:#0E9F8E;
  --brand-dark:#0A7C6F;
  --accent:#F2622E;
  --lime:#C9E265;
  --ink:#12211E;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E8E1D8;
  --text:#1C2321;
  --muted:#5A6560;
  --faint:#8C948F;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,33,30,.06),0 8px 24px rgba(18,33,30,.08);
  --shadow-hv:0 12px 32px rgba(18,33,30,.12);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  padding-bottom:calc(72px + env(safe-area-inset-bottom));
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;font-weight:700}
p{margin:0}
:focus-visible{outline:3px solid rgba(14,159,142,.35);outline-offset:2px;border-radius:6px}
.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.shell{padding:0 32px}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,248,244,.86);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.94);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(18,33,30,.05),0 6px 20px rgba(18,33,30,.06);
}
.hd-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--ink);white-space:nowrap}
.logo-mark{display:inline-flex;align-items:center;justify-content:center}
.logo-sub{font-size:12px;font-weight:600;color:var(--brand);margin-left:4px;letter-spacing:.04em}
.main-nav{display:none;align-items:center;gap:6px}
@media(min-width:1024px){.main-nav{display:flex}}
.nav-link{
  position:relative;display:inline-block;padding:9px 14px;border-radius:var(--r-btn);
  font-size:15px;color:var(--muted);transition:color .18s ease,background-color .18s ease;
}
.nav-link:hover{color:var(--ink);background:rgba(14,159,142,.08)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
}
.hd-actions{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);border-radius:var(--r-btn);color:var(--muted);
  transition:color .18s ease,border-color .18s ease,transform .18s ease;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand)}
.icon-btn:active{transform:scale(.96)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .15s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-primary:active{transform:scale(.98)}
.btn-outline{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}
.btn-ghost{background:transparent;color:var(--brand);padding-left:6px;padding-right:6px}
.btn-ghost i{transition:transform .18s ease}
.btn-ghost:hover i{transform:translateX(4px)}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px}
.btn-white{background:#fff;color:var(--ink)}
.btn-white:hover{background:var(--lime);color:var(--ink)}

/* ============ 面包屑 ============ */
.crumb{padding:20px 0 0;font-size:13px;color:var(--faint)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb a{color:var(--muted);transition:color .18s ease}
.crumb a:hover{color:var(--brand)}
.crumb li[aria-current]{color:var(--ink);font-weight:600}

/* ============ 分类头 ============ */
.cat-hero{
  position:relative;overflow:hidden;margin-top:18px;border-radius:20px;color:#fff;
  background-image:linear-gradient(100deg,rgba(18,33,30,.88),rgba(18,33,30,.62)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cat-hero-inner{padding:44px 24px 40px;max-width:760px}
@media(min-width:1024px){.cat-hero-inner{padding:64px 56px 60px}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(242,98,46,.92);color:#fff;font-size:13px;font-weight:600;letter-spacing:.02em;
}
.cat-hero h1{color:#fff;font-size:28px;line-height:1.3;margin-top:18px}
@media(min-width:1024px){.cat-hero h1{font-size:40px;line-height:1.25}}
.cat-hero .lede{margin-top:16px;font-size:16px;line-height:1.9;color:rgba(255,255,255,.86);max-width:640px}
.hero-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}

/* ============ 筛选 chips ============ */
.chips-bar{padding:26px 0 6px;border-bottom:1px solid var(--line)}
.chips{display:flex;gap:10px;overflow-x:auto;padding-bottom:16px;scrollbar-width:thin}
.chips::-webkit-scrollbar{height:5px}
.chips::-webkit-scrollbar-thumb{background:var(--line);border-radius:999px}
.chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;background:var(--surface);
  border:1px solid var(--line);color:var(--muted);font-size:14px;font-weight:500;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.chip:hover{color:var(--ink);border-color:var(--ink)}
.chip.is-on{background:rgba(14,159,142,.1);border-color:rgba(14,159,142,.45);color:var(--brand-dark);font-weight:600}

/* ============ 版块与标题 ============ */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.sec-head{max-width:720px}
.sec-head h2{font-size:24px;line-height:1.35}
@media(min-width:1024px){.sec-head h2{font-size:30px}}
.sec-head p{margin-top:12px;color:var(--muted);font-size:16px}

/* ============ 目录+条目布局 ============ */
.cat-layout{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:1024px){.cat-layout{grid-template-columns:240px 1fr;gap:48px;align-items:start}}
.toc{position:sticky;top:96px;display:none}
@media(min-width:1024px){.toc{display:block}}
.toc h3{font-size:15px;letter-spacing:.04em;color:var(--faint);font-weight:600}
.toc ol{margin-top:14px;border-left:1px solid var(--line)}
.toc li a{
  display:block;padding:9px 0 9px 16px;font-size:15px;color:var(--muted);
  border-left:2px solid transparent;margin-left:-1px;transition:color .18s ease,border-color .18s ease;
}
.toc li a:hover{color:var(--brand);border-left-color:var(--brand)}

.entry-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.entry{
  display:grid;grid-template-columns:1fr;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background-color .18s ease;
}
@media(min-width:640px){
  .entry{grid-template-columns:180px 1fr;gap:22px;align-items:center;padding:18px 16px;border-radius:14px;border-bottom:1px solid var(--line)}
  .entry:hover{background:#fff;box-shadow:var(--shadow-sm)}
}
.entry-thumb{
  border-radius:var(--r-img);overflow:hidden;background:#EDE7DF;aspect-ratio:16/10;
}
@media(min-width:640px){.entry-thumb{aspect-ratio:5/3;height:104px}}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s ease}
.entry:hover .entry-thumb img{transform:scale(1.04)}
.entry h3{font-size:19px;line-height:1.45}
.entry .sum{
  margin-top:8px;color:var(--muted);font-size:15px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry .foot{margin-top:12px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;justify-content:space-between}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--faint)}
.badge{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
  background:rgba(14,159,142,.1);color:var(--brand-dark);font-size:12px;font-weight:600;
}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--muted);font-size:12px;
}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.arrow-link i{transition:transform .18s ease}
.entry:hover .arrow-link i,
.arrow-link:hover i{transform:translateX(4px)}

/* ============ 指标速读 ============ */
.metrics-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metric-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px}
@media(min-width:768px){.metric-grid{grid-template-columns:1.2fr 1fr 1fr;gap:24px}}
.metric{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.metric:hover{transform:translateY(-2px);box-shadow:var(--shadow-hv)}
.metric .num{
  font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;
}
.metric h3{margin-top:10px;font-size:19px;line-height:1.45}
.metric p{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.8}
.metric ul{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}

/* ============ 场景 2×2 ============ */
.scene-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px}
@media(min-width:768px){.scene-grid{grid-template-columns:1fr 1fr;gap:24px}}
.scene{
  display:flex;gap:18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.scene:hover{transform:translateY(-2px);box-shadow:var(--shadow-hv)}
.scene .idx{
  flex:0 0 44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(14,159,142,.1);color:var(--brand-dark);font-weight:700;
  font-family:ui-monospace,Menlo,Consolas,monospace;font-size:16px;
}
.scene h3{font-size:19px;line-height:1.45}
.scene p{margin-top:8px;color:var(--muted);font-size:15px;line-height:1.8}

/* ============ CTA 浅底带 ============ */
.cta-band{
  background-image:linear-gradient(120deg,rgba(14,159,142,.1),rgba(201,226,101,.22));
  border:1px solid var(--line);border-radius:20px;
  padding:36px 24px;display:flex;flex-direction:column;gap:22px;
}
@media(min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 48px;gap:40px}
}
.cta-band h2{font-size:24px;line-height:1.35}
@media(min-width:1024px){.cta-band h2{font-size:28px}}
.cta-band p{margin-top:10px;color:var(--muted);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{margin-top:72px;background:var(--ink);color:rgba(255,255,255,.7);padding:56px 0 32px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:300px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;letter-spacing:.02em}
.footer-col ul{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .18s ease}
.footer-col a:hover{color:var(--brand)}
.footer-contact{margin-top:14px;display:flex;flex-direction:column;gap:10px;font-size:14px;color:rgba(255,255,255,.68)}
.footer-contact i{width:16px;color:var(--brand);margin-right:6px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(3,1fr);
  background:rgba(255,255,255,.96);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
@media(min-width:1024px){.mobile-tab{display:none}}
.mobile-tab a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  min-height:56px;font-size:11px;color:var(--faint);position:relative;
}
.mobile-tab a i{font-size:18px}
.mobile-tab a.is-active{color:var(--brand);font-weight:600}
.mobile-tab a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:28px;height:2px;border-radius:2px;background:var(--brand);
}
@media(max-width:1023px){body{padding-bottom:calc(72px + env(safe-area-inset-bottom))}}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category1 */
:root{
  --brand:#0E9F8E;
  --brand-dark:#0A7C6F;
  --accent:#F2622E;
  --lime:#C9E265;
  --ink:#12211E;
  --bg:#FBF8F4;
  --surface:#FFFFFF;
  --line:#E8E1D8;
  --text:#1C2321;
  --muted:#5A6560;
  --faint:#8C948F;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,33,30,.06),0 8px 24px rgba(18,33,30,.08);
  --shadow-hover:0 12px 32px rgba(18,33,30,.12);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,"Inter",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.35;font-weight:700;color:var(--ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(14,159,142,.35);border-radius:8px;}

.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:72px 0;}
.section-title{font-size:30px;margin-bottom:10px;}
.section-sub{color:var(--muted);font-size:15px;margin-bottom:32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,248,244,.86);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.9);border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(18,33,30,.05);}
.hd-inner{display:flex;align-items:center;gap:28px;height:72px;}
.logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);white-space:nowrap;}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;}
.logo-sub{font-size:12px;font-weight:600;color:var(--brand);margin-left:6px;padding:2px 8px;border:1px solid rgba(14,159,142,.35);border-radius:999px;vertical-align:middle;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  padding:9px 14px;border-radius:999px;font-size:15px;color:var(--muted);
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--ink);background:rgba(14,159,142,.08);}
.nav-link.is-active{color:var(--brand);background:rgba(14,159,142,.12);font-weight:600;}
.hd-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  color:var(--muted);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:color .18s ease,border-color .18s ease,transform .18s ease;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(14,159,142,.5);}
.icon-btn:active{transform:scale(.96);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:13px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1.5px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 1px 2px rgba(18,33,30,.06);}
.btn-primary:hover{background:var(--brand-dark);box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-ghost:active{transform:scale(.98);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px;}
.btn-text i{transition:transform .18s ease;}
.btn-text:hover i{transform:translateX(4px);}

/* ---------- breadcrumb ---------- */
.crumb-wrap{border-bottom:1px solid var(--line);background:var(--surface);}
.crumb{display:flex;align-items:center;gap:8px;height:52px;font-size:14px;color:var(--faint);overflow:hidden;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .now{color:var(--ink);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}

/* ---------- category hero ---------- */
.cat-hero{
  position:relative;margin-top:32px;border-radius:24px;overflow:hidden;
  background:var(--ink);color:#fff;box-shadow:var(--shadow-sm);
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.42;
}
.cat-hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(18,33,30,.92) 8%,rgba(18,33,30,.72) 52%,rgba(10,124,111,.55) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding:56px 48px 48px;max-width:900px;}
.cat-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--lime);
  border:1px solid rgba(201,226,101,.45);border-radius:999px;padding:5px 14px;
}
.cat-hero h1{color:#fff;font-size:40px;line-height:1.25;margin:20px 0 16px;}
.cat-hero h1 .hl{
  background:linear-gradient(45deg,#C9E265,#F2622E);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-lead{color:rgba(255,255,255,.82);font-size:16px;line-height:1.85;max-width:760px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;padding:8px 14px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);color:#fff;
}
.hero-tag i{color:var(--lime);}

/* ---------- chips ---------- */
.chips-row{padding:28px 0 0;}
.chips{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none;}
.chips::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;padding:9px 18px;border-radius:999px;border:1px solid var(--line);
  background:var(--surface);color:var(--muted);font-size:14px;cursor:pointer;
  transition:all .18s ease;
}
.chip:hover{border-color:rgba(14,159,142,.5);color:var(--brand);}
.chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;}

/* ---------- layout ---------- */
.cat-layout{
  display:grid;grid-template-columns:264px minmax(0,1fr);gap:40px;
  align-items:start;padding:44px 0 8px;
}
.toc-card{
  position:sticky;top:96px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-sm);
}
.toc-title{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.toc-title i{color:var(--brand);}
.toc-list li+li{margin-top:2px;}
.toc-list a{
  display:flex;align-items:center;gap:10px;padding:10px 10px;border-radius:10px;
  font-size:14px;color:var(--muted);border-left:3px solid transparent;
  transition:all .18s ease;
}
.toc-list a:hover{background:var(--bg);color:var(--brand);border-left-color:var(--brand);}
.toc-hint{
  margin-top:18px;padding-top:18px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--faint);line-height:1.7;
}

/* ---------- entry list ---------- */
.list-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px;}
.list-head h2{font-size:30px;}
.list-head span{font-size:14px;color:var(--faint);}
.entries{display:flex;flex-direction:column;gap:16px;}
.entry{
  display:grid;grid-template-columns:184px minmax(0,1fr) 40px;gap:22px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.entry:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(14,159,142,.4);}
.entry-thumb{position:relative;border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/10;}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.entry:hover .entry-thumb img{transform:scale(1.05);}
.entry-num{
  position:absolute;left:10px;top:10px;
  font-family:var(--font-num);font-size:12px;font-weight:700;
  background:var(--accent);color:#fff;border-radius:999px;padding:3px 10px;
}
.entry-body h3{font-size:19px;line-height:1.45;margin-bottom:6px;}
.entry-body p{
  font-size:15px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:10px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  background:rgba(14,159,142,.12);color:var(--brand-dark);border-radius:999px;padding:4px 11px;
}
.entry-note{font-size:12.5px;color:var(--faint);font-family:var(--font-num);}
.entry-arrow{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--muted);
  transition:all .2s ease;
}
.entry:hover .entry-arrow{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ---------- numbered strip ---------- */
.strip{
  background:var(--surface);border:1px solid var(--line);border-radius:20px;
  padding:36px;box-shadow:var(--shadow-sm);
}
.strip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.strip-item{padding:0 22px;border-left:1px solid var(--line);}
.strip-item:first-child{padding-left:0;border-left:0;}
.strip-item .no{font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.06em;}
.strip-item h3{font-size:17px;margin:10px 0 8px;}
.strip-item p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- scene blocks ---------- */
.scene{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.scene.rev .scene-media{order:2;}
.scene-media{position:relative;aspect-ratio:4/3;overflow:hidden;}
.scene-media img{width:100%;height:100%;object-fit:cover;}
.scene-media .corner{
  position:absolute;left:16px;top:16px;background:var(--accent);color:#fff;
  font-size:12px;font-weight:700;border-radius:999px;padding:5px 12px;
}
.scene-body{padding:36px 36px 36px 8px;}
.scene.rev .scene-body{padding:36px 8px 36px 36px;}
.scene-body h3{font-size:22px;margin-bottom:12px;}
.scene-body p{font-size:15px;color:var(--muted);line-height:1.85;}
.scene-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.tag{
  font-size:13px;color:var(--muted);background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:5px 12px;
}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:0;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(14,159,142,.45);box-shadow:var(--shadow-sm);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .fq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(14,159,142,.12);color:var(--brand);font-size:13px;
  transition:transform .18s ease;
}
.faq-item[open] summary .fq-icon{transform:rotate(180deg);}
.faq-item .fq-body{padding:0 24px 22px;color:var(--muted);font-size:15px;line-height:1.85;}

/* ---------- cta ---------- */
.cta-band{
  background:var(--bg);border:1px solid var(--line);border-radius:20px;
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--shadow-sm);
}
.cta-band h2{font-size:24px;margin-bottom:8px;}
.cta-band p{font-size:15px;color:var(--muted);}
.cta-band .cta-actions{display:flex;gap:12px;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);margin-top:88px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:16px;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul li+li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .18s ease;}
.footer-col a:hover{color:var(--brand);}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;}
.footer-contact span{display:flex;align-items:center;gap:10px;color:rgba(255,255,255,.68);}
.footer-contact i{color:var(--brand);width:16px;text-align:center;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap;
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.97);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  backdrop-filter:blur(10px);
}
.mobile-tab ul{display:grid;grid-template-columns:repeat(3,1fr);}
.mobile-tab a{
  position:relative;height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:var(--faint);
}
.mobile-tab a i{font-size:19px;}
.mobile-tab a.is-on{color:var(--brand);font-weight:600;}
.mobile-tab a.is-on::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--brand);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .cat-layout{grid-template-columns:1fr;gap:28px;}
  .toc-card{position:static;}
  .strip-grid{grid-template-columns:repeat(2,1fr);gap:28px 0;}
  .strip-item:nth-child(3){padding-left:0;border-left:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  body{font-size:16px;padding-bottom:72px;}
  .shell{padding:0 20px;}
  .section{padding:52px 0;}
  .main-nav{display:none;}
  .hd-actions .btn{display:none;}
  .logo{font-size:16px;}
  .logo-sub{display:none;}
  .cat-hero-inner{padding:36px 24px 32px;}
  .cat-hero h1{font-size:28px;line-height:1.3;}
  .cat-lead{font-size:15px;}
  .section-title,.list-head h2{font-size:24px;}
  .entry{grid-template-columns:104px minmax(0,1fr);gap:14px;padding:14px;}
  .entry-arrow{display:none;}
  .entry-body h3{font-size:16px;}
  .entry-body p{-webkit-line-clamp:2;font-size:14px;}
  .scene{grid-template-columns:1fr;}
  .scene.rev .scene-media{order:0;}
  .scene-body,.scene.rev .scene-body{padding:24px;}
  .strip{padding:24px;}
  .strip-grid{grid-template-columns:1fr;gap:0;}
  .strip-item{padding:18px 0;border-left:0;border-top:1px solid var(--line);}
  .strip-item:first-child{border-top:0;padding-top:0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{flex:1;}
  .footer-grid{grid-template-columns:1fr;}
  .mobile-tab{display:block;}
  .site-footer{margin-top:56px;padding:44px 0 24px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}