/* roulang page: index */
:root{
  --brand-900:#0F2E28;
  --brand-600:#1F5A4C;
  --brand-300:#7FB3A3;
  --accent:#C9F24D;
  --accent-2:#E2703A;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --ink-900:#14181A;
  --ink-700:#3A4442;
  --ink-500:#6B7A76;
  --line:#E3E1DB;
  --dark-ink:#F3F1EA;
  --dark-line:rgba(243,241,234,.16);
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,24,26,.04);
  --shadow-2:0 14px 32px -14px rgba(15,46,40,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-600);text-decoration:none;transition:color 180ms var(--ease);}
a:hover{color:var(--brand-900);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:rgba(246,244,239,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav{
  height:var(--header-h);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:600;
  color:var(--ink-700);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform 200ms var(--ease);
}
.nav-link:hover{color:var(--brand-900);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand-900);}
.logo{
  display:flex;align-items:center;gap:10px;
  font-size:19px;font-weight:800;letter-spacing:-.01em;
  color:var(--brand-900);white-space:nowrap;
}
.logo:hover{color:var(--brand-900);}
.logo-mark{
  width:16px;height:16px;border-radius:4px;background:var(--accent);
  box-shadow:0 0 0 1px rgba(15,46,40,.15);
  flex:0 0 auto;
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-pill);
  background:var(--brand-900);color:var(--dark-ink);
  font-size:14px;font-weight:600;
  transition:transform 180ms var(--ease),background 180ms var(--ease);
}
.nav-cta:hover{background:#0b221d;color:var(--dark-ink);transform:translateY(-2px);}
.menu-toggle{
  display:none;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:var(--surface);
  align-items:center;justify-content:center;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--brand-900);position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--brand-900);
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}
.mobile-panel{
  display:none;
  position:fixed;top:var(--header-h);left:0;right:0;bottom:0;z-index:79;
  background:var(--bg);border-top:1px solid var(--line);
  padding:12px 24px 32px;overflow-y:auto;
}
.mobile-panel.open{display:block;}
.mobile-panel a{
  display:block;font-size:17px;font-weight:600;color:var(--ink-900);
  padding:16px 0;border-bottom:1px solid var(--line);line-height:1.4;
}
.mobile-panel .mobile-cta{
  margin-top:24px;text-align:center;border:0;
  background:var(--brand-900);color:var(--dark-ink);
  border-radius:var(--radius-pill);padding:14px 0;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1.4;
  transition:transform 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease);
}
.btn-primary{background:var(--brand-900);color:var(--dark-ink);}
.btn-primary:hover{background:#0b221d;color:var(--dark-ink);transform:translateY(-2px);}
.btn-ghost{border:1px solid var(--brand-900);color:var(--brand-900);}
.btn-ghost:hover{background:var(--brand-900);color:var(--dark-ink);transform:translateY(-2px);}
.btn-accent{background:var(--accent);color:var(--ink-900);}
.btn-accent:hover{background:#b9e03c;color:var(--ink-900);transform:translateY(-2px);}
.btn-outline-light{border:1px solid var(--dark-line);color:var(--dark-ink);}
.btn-outline-light:hover{background:rgba(243,241,234,.10);color:var(--dark-ink);transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

/* ---------- hero ---------- */
.hero{
  position:relative;
  margin-top:var(--header-h);
  padding:88px 0 76px;
  background:
    radial-gradient(900px 420px at 78% 12%,rgba(127,179,163,.20),transparent 62%),
    linear-gradient(160deg,#0F2E28 0%,#123A32 58%,#0C2621 100%);
  color:var(--dark-ink);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(243,241,234,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(243,241,234,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 20% 30%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 20% 30%,#000,transparent 72%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:56px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.14em;
  color:var(--accent);text-transform:uppercase;
  border:1px solid rgba(201,242,77,.35);
  border-radius:var(--radius-pill);
  padding:6px 14px;margin-bottom:22px;
}
.hero h1{
  font-size:clamp(2.1rem,4.2vw,3.5rem);
  font-weight:800;line-height:1.12;letter-spacing:-.02em;
  color:#FAF9F5;
}
.hero h1 em{
  font-family:"Noto Serif SC","Songti SC",serif;
  font-style:normal;color:var(--accent);
}
.hero-sub{
  margin-top:20px;max-width:34em;
  font-size:17px;line-height:1.8;color:rgba(243,241,234,.78);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:12px 40px;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--dark-line);
}
.stat-num{
  font-family:var(--font-mono);font-size:24px;font-weight:600;
  color:var(--accent);letter-spacing:-.01em;line-height:1.2;
}
.stat-label{font-size:13px;color:rgba(243,241,234,.62);margin-top:4px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius-card);
  outline:1px solid rgba(201,242,77,.45);
  outline-offset:-1px;
  box-shadow:0 24px 60px -28px rgba(0,0,0,.6);
}
.hero-media .media-tag{
  position:absolute;left:16px;bottom:16px;
  font-size:12.5px;font-weight:600;color:var(--ink-900);
  background:var(--accent);border-radius:6px;padding:6px 12px;
}

/* ---------- section base ---------- */
.section{padding:96px 0;}
.section.tight{padding:80px 0 64px;}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:40px;
}
.section-head h2{
  position:relative;padding-left:16px;
  font-size:clamp(1.45rem,2.3vw,2.05rem);
  font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;
  background:var(--accent);border-radius:2px;
}
.section-head .note{font-size:14px;color:var(--ink-500);max-width:38em;}
.text-link{
  font-size:14px;font-weight:600;color:var(--brand-600);
  display:inline-flex;align-items:center;gap:6px;
}
.text-link:hover{color:var(--brand-900);gap:10px;}
.hairline{border-top:1px solid var(--line);}

/* ---------- index list ---------- */
.index-list{border-top:1px solid var(--line);}
.index-row{
  display:grid;grid-template-columns:64px 1fr auto;
  align-items:center;gap:20px;
  min-height:82px;padding:18px 16px 18px 8px;
  border-bottom:1px solid var(--line);
  position:relative;
  transition:background 180ms var(--ease);
}
.index-row::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--accent);transform:scaleY(0);transform-origin:top;
  transition:transform 200ms var(--ease);
}
.index-row:hover{background:var(--surface);}
.index-row:hover::before{transform:scaleY(1);}
.idx-num{font-family:var(--font-mono);font-size:14px;color:var(--ink-500);}
.idx-title{font-size:17px;font-weight:600;color:var(--ink-900);}
.idx-desc{font-size:14px;color:var(--ink-500);line-height:1.7;}
.idx-go{
  font-size:13px;font-weight:600;color:var(--brand-600);
  opacity:0;transform:translateX(-6px);
  transition:opacity 180ms var(--ease),transform 180ms var(--ease);
  white-space:nowrap;
}
.index-row:hover .idx-go{opacity:1;transform:translateX(0);}

/* ---------- feature cards ---------- */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start;}
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:border-color 180ms var(--ease),transform 180ms var(--ease),box-shadow 180ms var(--ease);
}
.card:hover{border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.card-cover{overflow:hidden;}
.card-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 320ms var(--ease);}
.card:hover .card-cover img{transform:scale(1.03);}
.card-body{padding:24px;}
.card-body h3{font-size:1.2rem;font-weight:600;line-height:1.4;}
.card-sm .card-body{padding:20px 22px;}
.card-sm .card-body h3{font-size:1.05rem;}
.card-sum{
  margin-top:10px;font-size:14px;color:var(--ink-500);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:16px;display:flex;align-items:center;gap:12px;
  font-size:13px;color:var(--ink-500);font-family:var(--font-mono);
}
.badge{
  display:inline-block;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:6px;
  background:rgba(127,179,163,.18);color:var(--brand-900);
  font-family:var(--font-cn);letter-spacing:.02em;
}
.badge.hot{color:var(--accent-2);background:rgba(226,112,58,.12);}
.stack{display:grid;gap:24px;}

/* ---------- latest (cms) ---------- */
.latest-wrap{display:grid;grid-template-columns:7fr 5fr;gap:32px;}
.cms-lead{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:border-color 180ms var(--ease),transform 180ms var(--ease),box-shadow 180ms var(--ease);
}
.cms-lead:hover{border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.cms-lead img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.cms-lead .lead-body{padding:24px;}
.cms-lead h3{font-size:1.25rem;font-weight:600;line-height:1.45;color:var(--ink-900);}
.cms-lead p{
  margin-top:10px;font-size:14.5px;color:var(--ink-500);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-rows{border-top:1px solid var(--line);}
.cms-row{
  display:block;padding:16px 8px;border-bottom:1px solid var(--line);
  transition:background 180ms var(--ease);
}
.cms-row:hover{background:var(--surface);}
.cms-row h4{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5;}
.cms-row p{
  margin-top:6px;font-size:13.5px;color:var(--ink-500);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-row .meta{
  margin-top:8px;display:flex;align-items:center;gap:12px;
  font-size:12.5px;color:var(--ink-500);font-family:var(--font-mono);
}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  background:var(--surface);padding:44px 24px;text-align:center;
}
.empty-state .empty-icon{
  width:40px;height:40px;margin:0 auto 14px;border-radius:10px;
  background:rgba(127,179,163,.18);
}
.empty-state strong{display:block;font-size:15px;font-weight:600;color:var(--ink-700);}
.empty-state span{display:block;margin-top:6px;font-size:13.5px;color:var(--ink-500);}

/* ---------- scroller ---------- */
.scroller{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 4px 18px;margin:0 -4px;
  scrollbar-width:thin;
}
.scroller::-webkit-scrollbar{height:6px;}
.scroller::-webkit-scrollbar-thumb{background:var(--line);border-radius:99px;}
.scroll-item{
  flex:0 0 300px;scroll-snap-align:start;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:border-color 180ms var(--ease),transform 180ms var(--ease);
}
.scroll-item:hover{border-color:var(--brand-600);transform:translateY(-2px);}
.scroll-item img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.scroll-item .si-body{padding:16px 18px;}
.scroll-item h3{font-size:15.5px;font-weight:600;line-height:1.5;}
.scroll-item .meta{margin-top:8px;font-size:12.5px;color:var(--ink-500);font-family:var(--font-mono);}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink-900);
  transition:color 180ms var(--ease);
}
.faq-q:hover{color:var(--brand-600);}
.faq-sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  font-size:15px;line-height:1;color:var(--brand-600);
  transition:transform 240ms var(--ease),background 180ms var(--ease);
}
.faq-item.open .faq-sign{transform:rotate(45deg);background:rgba(201,242,77,.4);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 240ms var(--ease);
}
.faq-a p{
  padding:0 4px 24px;font-size:15px;color:var(--ink-700);line-height:1.85;max-width:60em;
}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand-900);color:var(--dark-ink);
  padding:64px 0;
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-inner h2{font-size:clamp(1.35rem,2.1vw,1.75rem);font-weight:700;line-height:1.35;}
.cta-inner p{margin-top:10px;font-size:14.5px;color:rgba(243,241,234,.72);max-width:36em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.share-group{display:flex;flex-wrap:wrap;gap:10px;}
.share-btn{
  padding:11px 18px;border-radius:var(--radius-pill);
  border:1px solid var(--dark-line);color:var(--dark-ink);
  font-size:14px;font-weight:600;
  transition:background 180ms var(--ease),transform 180ms var(--ease);
}
.share-btn:hover{background:rgba(243,241,234,.12);transform:translateY(-2px);}
.copy-tip{
  margin-top:14px;font-size:13px;color:var(--accent);min-height:20px;
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--brand-900);color:rgba(243,241,234,.78);
  padding:72px 0 28px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;
}
.footer-brand .logo{color:var(--dark-ink);}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(243,241,234,.66);max-width:24em;}
.footer-col h3{
  font-size:13px;font-weight:600;letter-spacing:.1em;
  color:rgba(243,241,234,.55);margin-bottom:16px;
}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(243,241,234,.82);}
.footer-col a:hover{color:var(--accent);}
.subscribe{display:flex;gap:10px;margin-top:8px;flex-wrap:wrap;}
.subscribe input{
  flex:1 1 160px;min-width:0;
  background:rgba(243,241,234,.06);
  border:1px solid var(--dark-line);
  border-radius:var(--radius-input);
  padding:12px 14px;font-size:14px;color:var(--dark-ink);
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.subscribe input::placeholder{color:rgba(243,241,234,.45);}
.subscribe input:focus{
  outline:none;border-color:var(--brand-300);
  box-shadow:0 0 0 2px rgba(201,242,77,.35);
}
.subscribe .btn-accent{padding:12px 18px;}
.form-tip{margin-top:10px;font-size:12.5px;color:rgba(243,241,234,.6);min-height:18px;}
.footer-bottom{
  margin-top:56px;padding-top:20px;border-top:1px solid var(--dark-line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(243,241,234,.58);
}
.footer-bottom a{color:rgba(243,241,234,.58);}
.footer-bottom a:hover{color:var(--accent);}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.in{opacity:1;transform:none;}

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

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-inner{gap:40px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1/-1;}
}
@media (max-width:1023px){
  .nav-side{gap:18px;}
  .hero{padding:72px 0 64px;}
  .hero-inner{grid-template-columns:1fr;gap:36px;}
  .hero-media{order:-1;}
  .section{padding:76px 0;}
  .feature-grid{grid-template-columns:1fr;}
  .latest-wrap{grid-template-columns:1fr;gap:28px;}
  .stack{grid-template-columns:1fr 1fr;grid-auto-rows:1fr;}
}
@media (max-width:767px){
  :root{--header-h:68px;}
  .container{padding:0 20px;}
  .nav{grid-template-columns:auto 1fr auto;}
  .nav-side{display:none;}
  .logo{justify-content:center;font-size:17px;}
  .menu-toggle{display:flex;}
  .hero h1{font-size:clamp(1.9rem,7.6vw,2.6rem);}
  .hero-stats{gap:12px 24px;}
  .stat-num{font-size:20px;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:28px;}
  .index-row{grid-template-columns:44px 1fr;gap:14px;padding:16px 8px;}
  .idx-go{display:none;}
  .stack{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1/-1;}
  .scroll-item{flex:0 0 82%;}
  .scroller{padding-left:0;padding-right:0;}
}
@media (max-width:519px){
  body{font-size:16px;}
  .hero{padding:56px 0 48px;}
  .hero-actions .btn{width:100%;}
  .card-body{padding:20px;}
  .faq-q{font-size:16px;padding:18px 2px;}
  .footer-grid{grid-template-columns:1fr;}
  .subscribe input{flex:1 1 100%;}
}

/* roulang page: category1 */
:root{
  --brand-900:#0F2E28;
  --brand-600:#1F5A4C;
  --brand-300:#7FB3A3;
  --accent:#C9F24D;
  --accent-2:#E2703A;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --ink-900:#14181A;
  --ink-700:#3A4442;
  --ink-500:#6B7A76;
  --line:#E3E1DB;
  --line-dark:rgba(243,241,234,.16);
  --light-text:#F3F1EA;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(20,24,26,.04);
  --shadow-2:0 14px 32px -14px rgba(15,46,40,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"Inter","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* ---------- container ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,239,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  min-height:76px;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:24px;min-width:0}
.nav-side.right{justify-content:flex-end}
.nav-link{
  position:relative;
  font-size:14.5px;
  font-weight:600;
  color:var(--ink-700);
  white-space:nowrap;
  padding:6px 0;
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--brand-900)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-900)}
.nav-link.is-active::after{transform:scaleX(1)}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:800;letter-spacing:-.01em;
  color:var(--brand-900);white-space:nowrap;justify-self:center;
}
.logo-mark{
  width:11px;height:11px;border-radius:3px;background:var(--accent);
  box-shadow:0 0 0 3px rgba(201,242,77,.22);
  flex:0 0 auto;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{background:var(--brand-900);color:var(--light-text)}
.btn-primary:hover{background:#0A211C;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:var(--brand-900);border-color:var(--brand-900)}
.btn-ghost:hover{background:var(--brand-900);color:var(--light-text);transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:var(--ink-900)}
.btn-accent:hover{background:#BAE33C;transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn:disabled{opacity:.5;pointer-events:none}

/* ---------- badge / tag ---------- */
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;
  border-radius:6px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:rgba(127,179,163,.18);
  color:var(--brand-900);
}
.badge-hot{background:rgba(226,112,58,.12);color:var(--accent-2)}
.kicker{
  display:inline-block;
  font-size:12.5px;font-weight:600;letter-spacing:.12em;
  color:var(--brand-600);
  margin-bottom:10px;
}
.kicker-dark{color:var(--accent)}

/* ---------- cat hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--brand-900);
  color:var(--light-text);
  padding:88px 0 72px;
}
.cat-hero__bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.26;
}
.cat-hero__veil{
  position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(15,46,40,.95) 0%,rgba(15,46,40,.74) 52%,rgba(15,46,40,.92) 100%);
}
.cat-hero .container{position:relative;z-index:2}
.cat-hero h1{
  font-size:clamp(2.1rem,4.2vw,3.2rem);
  font-weight:800;line-height:1.14;letter-spacing:-.02em;
  color:#FFFFFF;
  max-width:820px;
}
.cat-hero h1 em{
  font-style:normal;
  font-family:"Noto Serif SC","Songti SC",serif;
  color:var(--accent);
}
.cat-hero__lead{
  margin-top:18px;
  font-size:17px;line-height:1.8;
  color:rgba(243,241,234,.82);
  max-width:640px;
}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.cat-hero .btn-ghost{color:#F3F1EA;border-color:rgba(243,241,234,.42)}
.cat-hero .btn-ghost:hover{background:#F3F1EA;color:var(--brand-900);border-color:#F3F1EA}
.stat-row{
  display:flex;flex-wrap:wrap;gap:12px;
  margin-top:38px;
  padding-top:26px;
  border-top:1px solid var(--line-dark);
}
.stat{
  display:flex;align-items:baseline;gap:8px;
  padding:0 22px 0 0;
  border-right:1px solid var(--line-dark);
}
.stat:last-child{border-right:0;padding-right:0}
.stat b{
  font-family:var(--mono);
  font-size:22px;font-weight:600;color:var(--accent);
  letter-spacing:-.02em;
}
.stat span{font-size:13px;color:rgba(243,241,234,.68)}

/* ---------- sections ---------- */
.section{padding:92px 0}
.section-alt{background:#F1EEE7}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
  margin-bottom:42px;
}
.section-head h2{
  position:relative;
  font-size:clamp(1.45rem,2.3vw,2rem);
  font-weight:700;line-height:1.3;letter-spacing:-.01em;
  padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;
  width:3px;height:1em;border-radius:2px;background:var(--accent);
}
.section-head p{margin-top:10px;font-size:15px;color:var(--ink-500);padding-left:16px;max-width:680px}
.link-more{
  font-size:14px;font-weight:600;color:var(--brand-600);
  border-bottom:1px solid rgba(31,90,76,.3);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link-more:hover{color:var(--brand-900);border-color:var(--brand-900)}

/* ---------- intro ---------- */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 48px}
.intro-grid p{
  font-size:16px;line-height:1.9;color:var(--ink-700);
  margin-bottom:16px;
}
.intro-grid p:last-child{margin-bottom:0}
.intro-grid strong{color:var(--ink-900);font-weight:600}

/* ---------- feature cards ---------- */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.feature-side{display:grid;gap:24px}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--shadow-2)}
.card-media{overflow:hidden;aspect-ratio:16/10;background:#E9E6DF}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:24px}
.card-body h3{font-size:1.16rem;font-weight:600;line-height:1.45;margin-bottom:10px}
.card-body p{font-size:14.5px;line-height:1.75;color:var(--ink-500);margin-bottom:14px}
.card-meta{
  display:flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:12.5px;color:var(--ink-500);
}
.card-feature .card-body{padding:28px 28px 30px}
.card-feature .card-body h3{font-size:1.35rem}
.card-feature .card-body p{font-size:15px}
.card-compact{display:grid;grid-template-columns:132px 1fr;align-items:stretch}
.card-compact .card-media{aspect-ratio:auto;height:100%;min-height:132px}
.card-compact .card-body{padding:20px}
.card-compact .card-body h3{font-size:1.03rem;margin-bottom:6px}
.card-compact .card-body p{margin-bottom:0;font-size:13.5px}

/* ---------- listing rows ---------- */
.rows{border-top:1px solid var(--line)}
.row{
  position:relative;
  display:grid;
  grid-template-columns:88px 220px 1fr 28px;
  align-items:center;
  gap:20px;
  min-height:78px;
  padding:16px 18px;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.row::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  background:var(--accent);border-radius:2px;
  transform:scaleY(0);transform-origin:center;
  transition:transform .18s var(--ease);
}
.row:hover{background:var(--surface)}
.row:hover::before{transform:scaleY(1)}
.row__no{font-family:var(--mono);font-size:14px;color:var(--ink-500);letter-spacing:.04em}
.row__title{font-size:16px;font-weight:600;line-height:1.5}
.row__desc{font-size:14px;color:var(--ink-500);line-height:1.7}
.row__arrow{
  font-family:var(--mono);font-size:16px;color:var(--brand-300);
  opacity:0;transform:translateX(-4px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),color .18s var(--ease);
}
.row:hover .row__arrow{opacity:1;transform:translateX(0);color:var(--brand-600)}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;
  font-size:17px;font-weight:600;line-height:1.6;
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-600)}
.faq-ico{
  position:relative;flex:0 0 auto;
  width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand-900);transform:translate(-50%,-50%);
  transition:transform .2s var(--ease);
}
.faq-ico::before{width:12px;height:1.5px}
.faq-ico::after{width:1.5px;height:12px}
.faq-item[open] .faq-ico{background:var(--accent);border-color:var(--accent)}
.faq-item[open] .faq-ico::after{transform:translate(-50%,-50%) scaleY(0)}
.faq-body{padding:0 4px 24px;max-width:880px;font-size:15px;line-height:1.85;color:var(--ink-700)}

/* ---------- cross link ---------- */
.cross-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cross-card{
  display:block;
  padding:28px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.cross-card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--shadow-2)}
.cross-card h3{font-size:1.1rem;font-weight:600;margin:12px 0 8px}
.cross-card p{font-size:14.5px;color:var(--ink-500);line-height:1.75}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand-900);
  color:var(--light-text);
  border-radius:20px;
  padding:44px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  border:1px solid var(--line-dark);
}
.cta-band h2{font-size:clamp(1.3rem,2vw,1.7rem);font-weight:700;line-height:1.35;color:#fff}
.cta-band p{margin-top:10px;font-size:14.5px;color:rgba(243,241,234,.72);max-width:460px}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:11px 18px;border-radius:999px;
  border:1px solid rgba(243,241,234,.28);
  font-size:14px;font-weight:600;color:rgba(243,241,234,.9);
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.share-btn:hover{background:rgba(243,241,234,.12);border-color:rgba(243,241,234,.5);color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:var(--light-text);margin-top:0;padding:72px 0 0}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.5fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand .logo{color:var(--light-text);font-size:20px;justify-self:start}
.footer-brand p{
  margin-top:16px;font-size:14px;line-height:1.85;
  color:rgba(243,241,234,.66);max-width:320px;
}
.footer-col h3{
  font-size:14px;font-weight:600;letter-spacing:.06em;
  color:var(--accent);margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{
  font-size:14px;color:rgba(243,241,234,.78);
  transition:color .18s var(--ease);
}
.footer-col ul li a:hover{color:var(--accent)}
.subscribe{display:flex;gap:10px;flex-wrap:wrap}
.subscribe input{
  flex:1 1 150px;min-width:0;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  padding:12px 14px;
  font-size:14px;color:var(--ink-900);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.subscribe input::placeholder{color:#9AA5A1}
.subscribe input:focus{
  outline:none;border-color:var(--brand-600);
  box-shadow:0 0 0 3px rgba(201,242,77,.35);
}
.subscribe .btn{padding:12px 20px}
.form-tip{margin-top:10px;font-size:13px;min-height:18px;color:rgba(243,241,234,.66)}
.form-tip.err{color:#F3A07A}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 26px;
  border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(243,241,234,.6);
}

/* ---------- mobile nav ---------- */
.menu-toggle{
  display:none;
  justify-self:end;
  width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);
  background:var(--surface);
  align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.menu-toggle span{display:block;width:17px;height:1.6px;background:var(--brand-900);transition:transform .2s var(--ease),opacity .2s var(--ease)}
body.panel-open .menu-toggle span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
body.panel-open .menu-toggle span:nth-child(2){opacity:0}
body.panel-open .menu-toggle span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.mobile-panel{
  position:fixed;inset:76px 0 auto 0;z-index:79;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  padding:12px 0 24px;
  transform:translateY(-14px);
  opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  max-height:calc(100vh - 76px);
  overflow-y:auto;
}
body.panel-open .mobile-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-panel a{
  display:block;
  padding:0 24px;
  font-size:17px;
  line-height:52px;
  font-weight:600;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.is-active{color:var(--brand-900);box-shadow:inset 3px 0 0 var(--accent)}
.mobile-panel .btn{margin:18px 24px 0;width:calc(100% - 48px)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-link{font-size:14px}
  .nav-side{gap:18px}
  .row{grid-template-columns:70px 190px 1fr 24px;gap:16px}
}
@media (max-width:1023px){
  .section{padding:76px 0}
  .feature-grid{grid-template-columns:1fr}
  .card-compact{grid-template-columns:160px 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .intro-grid{grid-template-columns:1fr;gap:8px}
  .row{grid-template-columns:64px 1fr 24px;grid-template-rows:auto auto}
  .row__title{grid-column:2}
  .row__desc{grid-column:2;grid-row:2}
  .row__no{grid-row:1 / span 2}
  .row__arrow{grid-column:3;grid-row:1 / span 2}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-side{display:none}
  .menu-toggle{display:flex}
  .header-inner{grid-template-columns:1fr auto 1fr;min-height:68px}
  .logo{font-size:17px;justify-self:start}
  .menu-toggle{grid-column:3}
  .cat-hero{padding:56px 0 48px}
  .cat-hero__lead{font-size:15.5px;margin-top:14px}
  .cat-hero__actions{margin-top:24px}
  .stat{padding-right:16px}
  .stat b{font-size:19px}
  .section{padding:60px 0}
  .section-head{margin-bottom:30px}
  .card-feature .card-body{padding:22px}
  .card-compact{grid-template-columns:1fr}
  .card-compact .card-media{aspect-ratio:16/10;height:auto;min-height:0}
  .row{grid-template-columns:1fr 22px;gap:8px 12px;padding:16px 6px}
  .row__no{grid-row:auto;grid-column:1;font-size:12.5px}
  .row__title{grid-column:1}
  .row__desc{grid-column:1;grid-row:auto}
  .row__arrow{grid-column:2;grid-row:1;opacity:1;transform:none;align-self:start;margin-top:6px}
  .cross-grid{grid-template-columns:1fr}
  .cta-band{padding:32px 24px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr;gap:36px;padding-bottom:36px}
  .subscribe input{flex-basis:100%}
  .faq-item summary{font-size:16px;padding:18px 2px}
}
@media (max-width:479px){
  .logo{font-size:16px;gap:8px}
  .cat-hero h1{font-size:1.85rem}
  .stat-row{gap:10px}
  .stat{border-right:0;padding-right:0}
  .btn{padding:11px 20px;font-size:14.5px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-property:opacity !important;
    transition-duration:.18s !important;
    transform:none !important;
  }
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --brand-900:#0F2E28;
  --brand-800:#14382F;
  --brand-600:#1F5A4C;
  --brand-300:#7FB3A3;
  --accent:#C9F24D;
  --accent-2:#E2703A;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --ink-900:#14181A;
  --ink-700:#3A4442;
  --ink-500:#6B7A76;
  --line:#E3E1DB;
  --on-dark:#F3F1EA;
  --line-dark:rgba(243,241,234,.16);
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:10px;
  --shadow-1:0 1px 2px rgba(20,24,26,.04);
  --shadow-2:0 14px 32px -14px rgba(15,46,40,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--brand-900);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
body.no-scroll{overflow:hidden;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(246,244,239,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:76px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-side.left{justify-self:start;}
.nav-side.right{justify-self:end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--ink-700);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink-900);font-weight:600;}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:18px;font-weight:800;letter-spacing:-.01em;
  color:var(--ink-900);justify-self:center;
}
.logo:hover{color:var(--brand-900);}
.logo-mark{width:8px;height:8px;border-radius:2px;background:var(--accent);flex:none;}
.nav-cta{white-space:nowrap;}

.menu-toggle{
  display:none;
  width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  justify-self:end;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform var(--t),opacity var(--t);}
.menu-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.is-active span:nth-child(2){opacity:0;}
.menu-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-panel{
  position:fixed;left:0;right:0;top:76px;bottom:0;
  background:var(--bg);z-index:65;
  padding:20px 24px 40px;
  transform:translateY(-10px);opacity:0;pointer-events:none;
  transition:opacity var(--t),transform var(--t);
  overflow-y:auto;
}
.mobile-panel.is-open{opacity:1;transform:none;pointer-events:auto;}
.mobile-panel a.m-panel-link{
  display:block;font-size:17px;line-height:52px;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.m-panel-link.is-active{color:var(--brand-600);font-weight:600;}
.mobile-panel .btn{width:100%;margin-top:22px;}
.overlay{
  position:fixed;inset:0;background:rgba(15,46,40,.36);
  opacity:0;pointer-events:none;transition:opacity var(--t);z-index:60;
}
.overlay.is-open{opacity:1;pointer-events:auto;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none !important;}
.btn-primary{background:var(--brand-900);color:var(--on-dark);}
.btn-primary:hover{background:var(--brand-800);color:var(--on-dark);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-ghost{background:transparent;border-color:var(--brand-900);color:var(--brand-900);}
.btn-ghost:hover{background:var(--brand-900);color:var(--on-dark);transform:translateY(-2px);}
.btn-accent{background:var(--accent);color:var(--ink-900);}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 12px 26px -14px rgba(15,46,40,.45);color:var(--ink-900);}
.btn-on-dark{border-color:rgba(243,241,234,.45);color:var(--on-dark);background:transparent;}
.btn-on-dark:hover{border-color:var(--on-dark);background:rgba(243,241,234,.10);color:var(--on-dark);transform:translateY(-2px);}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:6px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:rgba(127,179,163,.16);color:var(--brand-600);
}
.badge-hot{background:rgba(226,112,58,.12);color:var(--accent-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;
  color:var(--brand-300);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:var(--brand-900);
  color:var(--on-dark);
  overflow:hidden;
  border-bottom:1px solid var(--line-dark);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(15,46,40,.97) 0%,rgba(15,46,40,.88) 52%,rgba(15,46,40,.72) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.hero .container{position:relative;z-index:1;}
.hero-inner{
  display:grid;grid-template-columns:1.12fr .88fr;
  gap:48px;align-items:center;
  padding:64px 0;min-height:340px;
}
.hero h1{
  font-size:clamp(2rem,3.5vw,3rem);
  font-weight:800;line-height:1.16;letter-spacing:-.02em;
  margin:18px 0 16px;color:var(--on-dark);
}
.hero h1 .serif{font-family:var(--serif);font-weight:700;}
.hero-sub{
  font-size:17px;line-height:1.7;
  color:rgba(243,241,234,.78);
  max-width:34em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:34px;
  margin-top:36px;padding-top:24px;
  border-top:1px solid var(--line-dark);
}
.hero-stat span{display:block;}
.hero-stat .num{
  font-family:var(--mono);font-size:22px;font-weight:600;
  color:var(--accent);letter-spacing:-.01em;
}
.hero-stat .lbl{font-size:13px;color:rgba(243,241,234,.66);margin-top:2px;}
.hero-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius-card);
  border:1px solid rgba(201,242,77,.45);
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-bordered{border-top:1px solid var(--line);}
.section-dark{background:var(--brand-900);color:var(--on-dark);}
.section-dark .section-head h2{color:var(--on-dark);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;flex-wrap:wrap;
}
.section-head h2{
  position:relative;padding-left:16px;
  font-size:clamp(1.45rem,2.3vw,2.05rem);
  font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.2em;
  width:3px;height:1em;border-radius:2px;background:var(--accent);
}
.section-head .head-note{font-size:14.5px;color:var(--ink-500);max-width:36em;}
.section-dark .head-note{color:rgba(243,241,234,.66);}
.text-link{font-size:14.5px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;}
.text-link::after{content:"→";transition:transform var(--t);}
.text-link:hover::after{transform:translateX(3px);}
.section-dark .text-link{color:var(--accent);}

/* ---------- 分类简介 ---------- */
.intro-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:28px 48px;
}
.intro-grid p{font-size:16.5px;color:var(--ink-700);}
.intro-grid p strong{color:var(--ink-900);font-weight:600;}

/* ---------- 重点条目 ---------- */
.feature-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start;
}
.feature-side{display:grid;gap:24px;}
.card{
  display:block;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.card:hover{border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.card-media{overflow:hidden;}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform 320ms var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:22px 24px 24px;}
.card-body h3{font-size:1.2rem;font-weight:600;line-height:1.4;margin:12px 0 10px;}
.card-body p{font-size:14.5px;line-height:1.75;color:var(--ink-500);}
.card-meta{
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;
  margin-top:16px;font-family:var(--mono);font-size:12.5px;color:var(--ink-500);
}
.card-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:16px;font-size:14px;font-weight:600;color:var(--brand-600);
}
.card-link::after{content:"→";transition:transform var(--t);}
.card:hover .card-link::after{transform:translateX(3px);}
.card-compact .card-body{padding:20px 22px;}
.card-compact h3{font-size:1.05rem;margin:10px 0 8px;}
.card-compact p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- 条目清单 ---------- */
.entry-list{border-top:1px solid var(--line);}
.entry-row{
  position:relative;
  display:grid;grid-template-columns:96px 1fr auto;
  align-items:center;gap:20px;
  padding:24px 10px;
  border-bottom:1px solid var(--line);
  color:inherit;
  transition:background-color var(--t);
}
.entry-row::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent);transform:scaleY(0);transform-origin:center;
  transition:transform var(--t);
}
.entry-row:hover{background:var(--surface);}
.entry-row:hover::before{transform:scaleY(1);}
.entry-num{font-family:var(--mono);font-size:13px;color:var(--brand-600);font-weight:600;letter-spacing:.06em;}
.entry-main h3{font-size:1.02rem;font-weight:600;line-height:1.45;}
.entry-main p{font-size:14px;color:var(--ink-500);margin-top:3px;}
.entry-arrow{font-size:16px;color:var(--brand-300);transition:color var(--t),transform var(--t);}
.entry-row:hover .entry-arrow{color:var(--brand-600);transform:translateX(3px);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  width:100%;padding:22px 0;background:none;border:0;
  font-size:16.5px;font-weight:600;line-height:1.5;color:var(--ink-900);
  text-align:left;
}
.faq-q:hover{color:var(--brand-600);}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);position:relative;
  transition:border-color var(--t),transform var(--t),background-color var(--t);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  width:11px;height:1.5px;background:var(--brand-900);
  transform:translate(-50%,-50%);
}
.faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);transition:transform var(--t);}
.faq-item.is-open .faq-icon{border-color:var(--brand-600);background:var(--accent);}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(0deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms var(--ease);}
.faq-a-inner{padding:0 44px 24px 0;font-size:15px;line-height:1.85;color:var(--ink-700);}

/* ---------- 相关分类互链 ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.cross-card{
  display:flex;flex-direction:column;gap:10px;
  padding:26px 28px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);
}
.cross-card:hover{border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.cross-card h3{font-size:1.1rem;font-weight:600;color:var(--ink-900);}
.cross-card p{font-size:14.5px;color:var(--ink-500);line-height:1.7;}
.cross-card .cross-go{font-size:14px;font-weight:600;color:var(--brand-600);display:inline-flex;align-items:center;gap:6px;}
.cross-card .cross-go::after{content:"→";transition:transform var(--t);}
.cross-card:hover .cross-go::after{transform:translateX(3px);}

/* ---------- 底部 CTA ---------- */
.cta-band{background:var(--brand-900);color:var(--on-dark);padding:56px 0;}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(1.4rem,2.2vw,1.9rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.cta-inner p{margin-top:10px;font-size:15px;color:rgba(243,241,234,.72);max-width:44em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-900);color:var(--on-dark);padding:72px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;
  gap:40px;padding-bottom:52px;
}
.footer-brand .logo{color:var(--on-dark);justify-self:start;}
.footer-brand .logo:hover{color:var(--accent);}
.footer-brand p{
  margin-top:16px;font-size:14px;line-height:1.8;
  color:rgba(243,241,234,.66);max-width:30em;
}
.footer-col h3{
  font-size:14px;font-weight:600;letter-spacing:.06em;
  color:var(--on-dark);margin-bottom:16px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:rgba(243,241,234,.72);}
.footer-col a:hover{color:var(--accent);}
.subscribe{display:flex;gap:10px;flex-wrap:wrap;}
.subscribe input{
  flex:1 1 160px;min-width:0;
  padding:12px 14px;border-radius:var(--radius-input);
  border:1px solid var(--line-dark);background:rgba(243,241,234,.06);
  color:var(--on-dark);font-size:14px;
  transition:border-color var(--t),box-shadow var(--t);
}
.subscribe input::placeholder{color:rgba(243,241,234,.45);}
.subscribe input:focus{
  outline:none;border-color:var(--brand-300);
  box-shadow:0 0 0 2px rgba(201,242,77,.35);
}
.form-tip{margin-top:10px;font-size:13px;color:var(--accent);min-height:18px;}
.form-tip.is-error{color:var(--accent-2);}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 30px;border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(243,241,234,.6);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .card:hover,.cross-card:hover,.btn:hover{transform:none !important;}
  .card:hover .card-media img{transform:none !important;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .header-inner{gap:12px;}
  .nav-side{gap:18px;}
}
@media (max-width:1023px){
  .section{padding:78px 0;}
  .hero-inner{grid-template-columns:1fr;gap:34px;padding:56px 0;}
  .hero-media img{aspect-ratio:16/9;}
  .feature-grid{grid-template-columns:1fr;}
  .feature-side{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:860px){
  .nav-side.left .nav-link:not(:first-child){display:none;}
  .intro-grid{grid-template-columns:1fr;gap:22px;}
  .cross-grid{grid-template-columns:1fr;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .header-inner{grid-template-columns:1fr auto;height:68px;}
  .nav-side{display:none;}
  .logo{justify-self:start;font-size:17px;}
  .menu-toggle{display:flex;}
  .mobile-panel{top:68px;}
  .section{padding:64px 0;}
  .section-tight{padding:56px 0;}
  .section-head{margin-bottom:28px;}
  .feature-side{grid-template-columns:1fr;}
  .entry-row{grid-template-columns:64px 1fr auto;gap:14px;padding:20px 6px;}
  .entry-main p{display:none;}
  .cta-band{padding:48px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding-bottom:40px;}
  .site-footer{padding-top:56px;}
}
@media (max-width:479px){
  .hero h1{font-size:1.72rem;}
  .hero-stats{gap:22px;}
  .hero-actions .btn{width:100%;}
  .card-body{padding:18px 18px 20px;}
  .faq-q{font-size:15.5px;}
  .faq-a-inner{padding-right:0;}
}

/* roulang page: article */
:root{
  --brand-900:#0F2E28;
  --brand-700:#164237;
  --brand-600:#1F5A4C;
  --brand-300:#7FB3A3;
  --accent:#C9F24D;
  --accent-2:#E2703A;
  --bg:#F6F4EF;
  --surface:#FFFFFF;
  --ink-900:#14181A;
  --ink-700:#3A4442;
  --ink-500:#6B7A76;
  --line:#E3E1DB;
  --line-dark:rgba(243,241,234,.16);
  --on-dark:#F3F1EA;
  --radius-card:16px;
  --radius-img:12px;
  --radius-input:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,24,26,.04);
  --shadow-2:0 14px 32px -14px rgba(15,46,40,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
  --max:1200px;
  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--brand-900);}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.container{max-width:var(--max);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn-primary{background:var(--brand-900);color:var(--on-dark);}
.btn-primary:hover{background:var(--brand-700);color:var(--on-dark);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-ghost{background:transparent;border-color:var(--brand-900);color:var(--brand-900);}
.btn-ghost:hover{background:var(--brand-900);color:var(--on-dark);transform:translateY(-2px);}
.btn-accent{background:var(--accent);color:var(--ink-900);}
.btn-accent:hover{background:#d8fb70;color:var(--ink-900);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}

/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:6px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:rgba(127,179,163,.16);color:var(--brand-700);
}
.badge-hot{background:rgba(226,112,58,.12);color:var(--accent-2);}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 12px;border-radius:6px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-700);font-size:13px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px -18px rgba(15,46,40,.45);}
.nav-grid{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:24px;height:76px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;color:var(--ink-700);font-size:15px;font-weight:500;padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--brand-900);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand-900);font-weight:600;}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--brand-900);
  white-space:nowrap;
}
.logo:hover{color:var(--brand-900);}
.logo-mark{
  width:22px;height:8px;border-radius:2px;background:var(--accent);display:inline-block;
}
.menu-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--surface);
  font-size:14px;font-weight:600;color:var(--ink-900);
}
.menu-toggle:hover{border-color:var(--brand-600);}
.mobile-panel{
  display:none;overflow:hidden;max-height:0;
  border-top:1px solid var(--line);background:var(--bg);
  transition:max-height 240ms var(--ease);
}
.mobile-panel.open{max-height:420px;}
.mobile-panel ul{padding:10px 24px 20px;}
.mobile-panel li{border-bottom:1px solid var(--line);}
.mobile-panel li:last-child{border-bottom:0;}
.mobile-panel a{
  display:block;padding:14px 0;font-size:17px;color:var(--ink-900);font-weight:500;
}
.mobile-panel a.active{color:var(--brand-600);font-weight:700;}
.mobile-panel .panel-cta{padding:0 24px 22px;}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:22px 0 4px;font-size:13px;color:var(--ink-500);
}
.breadcrumb a{color:var(--ink-500);}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--brand-900);font-weight:600;}

/* ============ 文章头 ============ */
.article-shell{padding-top:12px;padding-bottom:72px;}
.post-head{padding:20px 0 26px;border-bottom:1px solid var(--line);}
.post-head h1{
  font-size:clamp(2rem,3.6vw,3rem);
  font-weight:800;line-height:1.16;letter-spacing:-.02em;
  color:var(--brand-900);margin:16px 0 18px;max-width:900px;
}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--ink-500);font-family:var(--font-num);letter-spacing:.02em;
}
.post-meta .dot{color:var(--brand-300);}
.post-meta time{font-family:var(--font-num);}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:20px;}
.share-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--surface);
  font-size:13px;font-weight:600;color:var(--ink-700);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.share-btn:hover{border-color:var(--brand-600);color:var(--brand-900);transform:translateY(-1px);}
.post-cover{margin:32px 0 0;border-radius:var(--radius-img);overflow:hidden;background:#e9e6df;aspect-ratio:16/9;}
.post-cover img{width:100%;height:100%;object-fit:cover;}
.post-cover figcaption{font-size:13px;color:var(--ink-500);text-align:center;padding:12px 0 0;}

/* ============ 文章主体布局 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:48px;margin-top:44px;
}
.article-body{max-width:740px;}
.prose{font-size:17px;line-height:1.9;color:var(--ink-900);}
.prose > * + *{margin-top:1.15em;}
.prose h2{
  font-size:clamp(1.4rem,2.2vw,1.85rem);font-weight:700;line-height:1.3;
  color:var(--brand-900);margin-top:2.2em;padding-left:14px;
  border-left:3px solid var(--accent);
}
.prose h3{font-size:1.18rem;font-weight:600;color:var(--brand-900);margin-top:1.8em;}
.prose p{margin-top:1.15em;}
.prose strong{font-weight:700;color:var(--brand-900);}
.prose a{border-bottom:1px solid rgba(31,90,76,.35);}
.prose a:hover{border-bottom-color:var(--brand-900);}
.prose ul,.prose ol{margin-top:1.1em;padding-left:2px;}
.prose ul li{position:relative;padding-left:20px;margin-top:.6em;color:var(--ink-700);}
.prose ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--brand-300);
}
.prose ol{counter-reset:item;}
.prose ol li{position:relative;padding-left:30px;margin-top:.7em;color:var(--ink-700);counter-increment:item;}
.prose ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:0;font-family:var(--font-num);font-size:13px;
  color:var(--brand-600);font-weight:600;
}
.prose blockquote{
  margin-top:1.5em;padding:16px 20px;
  border-left:3px solid var(--brand-600);background:rgba(127,179,163,.10);
  border-radius:0 var(--radius-img) var(--radius-img) 0;color:var(--ink-700);
}
.prose img{border-radius:var(--radius-img);margin-top:1.5em;}
.prose table{width:100%;border-collapse:collapse;margin-top:1.5em;font-size:15px;}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;}
.prose th{background:rgba(127,179,163,.12);color:var(--brand-900);font-weight:600;}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  background:var(--surface);padding:40px 28px;text-align:center;
}
.empty-state h2{font-size:1.3rem;color:var(--brand-900);}
.empty-state p{color:var(--ink-500);margin-top:10px;font-size:15px;}
.empty-state .btn{margin-top:20px;}

/* ============ 侧栏 ============ */
.article-aside{display:none;}
.aside-card{
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--surface);padding:20px;box-shadow:var(--shadow-1);
}
.aside-card + .aside-card{margin-top:18px;}
.aside-card h2{
  font-size:14px;font-weight:700;color:var(--brand-900);
  letter-spacing:.04em;margin-bottom:12px;
}
.aside-card p{font-size:14px;line-height:1.75;color:var(--ink-500);}
.aside-list li{border-bottom:1px solid var(--line);}
.aside-list li:last-child{border-bottom:0;}
.aside-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;font-size:14px;color:var(--ink-700);
}
.aside-list a:hover{color:var(--brand-600);}
.aside-list .arrow{color:var(--brand-300);font-family:var(--font-num);}

/* ============ 文末 ============ */
.post-foot{margin-top:52px;padding-top:28px;border-top:1px solid var(--line);max-width:740px;}
.tags-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tags-line .label{font-size:13px;color:var(--ink-500);letter-spacing:.06em;}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:26px;}
.post-nav a{
  display:block;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--surface);padding:18px 20px;
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.post-nav a:hover{border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.post-nav .dir{font-size:12px;letter-spacing:.08em;color:var(--ink-500);}
.post-nav .title{margin-top:8px;font-size:15px;font-weight:600;color:var(--brand-900);}

/* ============ 相关推荐 ============ */
.related{padding:8px 0 84px;}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:28px;
}
.section-head h2{
  font-size:clamp(1.4rem,2.2vw,1.95rem);font-weight:700;color:var(--brand-900);
  padding-left:14px;border-left:3px solid var(--accent);
}
.section-head .more{font-size:14px;font-weight:600;color:var(--brand-600);}
.section-head .more:hover{color:var(--brand-900);}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);
  box-shadow:var(--shadow-1);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{border-color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--shadow-2);}
.card-media{aspect-ratio:16/10;overflow:hidden;background:#e9e6df;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:1.05rem;font-weight:600;line-height:1.45;color:var(--brand-900);}
.card-body p{font-size:14px;line-height:1.7;color:var(--ink-500);}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;font-size:13px;color:var(--ink-500);font-family:var(--font-num);
}

/* ============ 深色 CTA ============ */
.cta-band{
  background:var(--brand-900);color:var(--on-dark);
  border-radius:20px;padding:42px 44px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  margin-bottom:84px;
}
.cta-band h2{font-size:clamp(1.3rem,2vw,1.7rem);color:var(--on-dark);}
.cta-band p{margin-top:10px;font-size:14.5px;color:rgba(243,241,234,.72);max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-actions .btn-ghost{border-color:var(--line-dark);color:var(--on-dark);}
.cta-actions .btn-ghost:hover{background:rgba(243,241,234,.10);border-color:var(--accent);color:var(--on-dark);}

/* ============ FAQ ============ */
.faq-block{padding-bottom:84px;}
.faq-list{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:18px;
  padding:20px 2px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink-900);
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--brand-600);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:15px;color:var(--brand-600);
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-item.open .faq-icon{border-color:var(--brand-600);background:rgba(127,179,163,.14);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms var(--ease);}
.faq-a p{padding:0 2px 22px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:760px;}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:none;align-items:center;gap:8px;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--brand-900);color:var(--on-dark);
  font-size:13px;font-weight:600;box-shadow:var(--shadow-2);
}
.to-top.show{display:inline-flex;}
.to-top:hover{background:var(--brand-700);color:var(--on-dark);}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);color:var(--on-dark);padding:72px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand .logo{color:var(--on-dark);font-size:20px;}
.footer-brand .logo:hover{color:var(--accent);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(243,241,234,.66);max-width:320px;}
.footer-col h3{font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--on-dark);margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:rgba(243,241,234,.72);}
.footer-col ul a:hover{color:var(--accent);}
.subscribe{display:flex;gap:8px;flex-wrap:wrap;}
.subscribe input{
  flex:1 1 150px;min-width:0;padding:12px 14px;border-radius:var(--radius-input);
  border:1px solid var(--line-dark);background:rgba(243,241,234,.06);color:var(--on-dark);font-size:14px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.subscribe input::placeholder{color:rgba(243,241,234,.45);}
.subscribe input:focus{outline:none;border-color:var(--brand-300);box-shadow:0 0 0 2px rgba(201,242,77,.35);}
.subscribe input.invalid{border-color:var(--accent-2);}
.form-tip{margin-top:10px;font-size:13px;color:rgba(243,241,234,.7);min-height:18px;}
.form-tip.error{color:#F0A17A;}
.form-tip.ok{color:var(--accent);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(243,241,234,.6);
}

/* ============ 响应式 ============ */
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:56px;}
  .article-aside{display:block;}
  .article-aside .aside-sticky{position:sticky;top:100px;}
}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:900px){
  .nav-side{display:none;}
  .nav-grid{grid-template-columns:1fr auto 1fr;height:70px;}
  .logo{margin:0 auto;font-size:18px;}
  .menu-toggle{display:inline-flex;justify-self:end;}
  .mobile-panel{display:block;}
  .article-body{max-width:none;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .post-head h1{font-size:1.85rem;}
  .post-cover{aspect-ratio:4/3;margin-top:24px;}
  .article-shell{padding-bottom:56px;}
  .article-layout{margin-top:32px;gap:36px;}
  .related{padding-bottom:64px;}
  .related-grid{grid-template-columns:1fr;}
  .post-nav{grid-template-columns:1fr;}
  .cta-band{padding:32px 24px;border-radius:16px;margin-bottom:64px;}
  .faq-block{padding-bottom:64px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{margin-top:40px;}
  .to-top{right:16px;bottom:16px;}
}
@media (max-width:520px){
  .post-meta{font-size:12.5px;}
  .share-row .share-btn{padding:7px 13px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .card:hover,.btn:hover{transform:none;}
}