/* roulang page: index */
:root{
  --ink-900:#08110F;
  --ink-800:#0E1A17;
  --ink-700:#16241F;
  --line:rgba(245,242,234,.12);
  --line-strong:rgba(245,242,234,.24);
  --paper:#F5F2EA;
  --paper-dim:#A9B5AF;
  --brand-500:#0FB79C;
  --brand-300:#6FE3D2;
  --brand-700:#0A8571;
  --accent:#FF6A3D;
  --ok:#35C48A;
  --warn:#E8B44A;
  --err:#FF6A3D;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --max:1200px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.svg-ico{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,17,15,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:30px;height:30px;color:var(--brand-500);display:grid;place-items:center;flex:0 0 auto}
.logo-mark svg{width:26px;height:26px}
.logo-text{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.logo-divider{width:1px;height:13px;background:var(--line-strong)}
.logo-sub{font-size:11.5px;font-weight:500;color:var(--brand-300);letter-spacing:.1em}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:8px}
.nav-link{
  position:relative;font-size:14px;font-weight:500;color:var(--paper-dim);
  padding:6px 0;transition:color .16s var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--paper)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--paper)}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 10px 0 12px;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-btn);
  color:var(--paper-dim);transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.nav-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(15,183,156,.14)}
.nav-search input{
  flex:1;min-width:0;background:transparent;border:0;color:var(--paper);font-size:13.5px;outline:none;
}
.nav-search input::placeholder{color:#7C8C86}
.nav-search .svg-ico{font-size:15px;flex:0 0 auto;color:var(--brand-300)}
.kbd{
  font-family:var(--font-num);font-size:11px;line-height:1;
  padding:4px 6px;border-radius:5px;color:var(--paper-dim);
  background:rgba(245,242,234,.07);border:1px solid var(--line);
}
.nav-quick{font-size:14px;font-weight:500;color:var(--paper-dim);transition:color .16s var(--ease);white-space:nowrap}
.nav-quick:hover{color:var(--brand-300)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  line-height:1.2;border:1px solid transparent;cursor:pointer;
  transition:transform .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
  min-height:44px;
}
.btn-primary{background:var(--accent);color:#12100E}
.btn-primary:hover{background:#ff7d55;transform:translateY(-1px)}
.btn-primary:active{background:#E85C31;transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-300)}
.btn-ghost:active{color:var(--brand-700);border-color:var(--brand-700)}
.btn-line{background:transparent;color:var(--paper);border-color:var(--line-strong)}
.btn-line:hover{border-color:var(--brand-500);color:var(--brand-300);transform:translateY(-1px)}
.btn-sm{padding:9px 16px;font-size:13.5px;min-height:38px;border-radius:8px}
.btn-nav{padding:10px 18px;font-size:14px;min-height:40px}
.btn:disabled,.btn[disabled]{opacity:.4;pointer-events:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:var(--ink-800);color:var(--paper);
  align-items:center;justify-content:center;
}
.nav-toggle .svg-ico{font-size:18px}

/* ---------- drawer ---------- */
.drawer-backdrop{
  position:fixed;inset:0;background:rgba(0,0,0,.58);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .28s var(--ease);
}
.drawer-backdrop.show{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:340px;z-index:80;
  background:var(--ink-800);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:18px;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-title{font-size:14px;font-weight:600;letter-spacing:.06em;color:var(--paper-dim)}
.drawer-close{width:44px;height:44px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--line);color:var(--paper)}
.drawer-nav{display:flex;flex-direction:column;padding-top:8px}
.drawer-nav a{
  display:flex;align-items:center;min-height:56px;font-size:16px;font-weight:500;
  color:var(--paper-dim);border-bottom:1px solid var(--line);
}
.drawer-nav a.active,.drawer-nav a:hover{color:var(--brand-300)}
.drawer-foot{margin-top:auto;padding-top:18px}
.drawer-foot .btn{width:100%}

/* ---------- hero ---------- */
.hero{
  position:relative;isolation:isolate;overflow:hidden;
  min-height:72vh;display:flex;align-items:center;
  padding:104px 0 80px;
}
.hero-bg{
  position:absolute;inset:0;z-index:-2;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center right;background-repeat:no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(90deg,rgba(8,17,15,.97) 0%,rgba(8,17,15,.93) 34%,rgba(8,17,15,.55) 66%,rgba(8,17,15,.28) 100%);
}
.hero-noise{
  position:absolute;inset:0;z-index:-1;opacity:.05;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)' opacity='.6'/%3E%3C/svg%3E");
}
.hero-copy{max-width:660px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;font-size:12px;letter-spacing:.08em;
  color:var(--brand-300);background:rgba(15,183,156,.12);border:1px solid rgba(15,183,156,.28);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand-300);box-shadow:0 0 0 3px rgba(111,227,210,.18)}
.hero h1{
  margin:20px 0 0;
  font-size:clamp(30px,4.2vw,54px);
  line-height:1.16;font-weight:700;letter-spacing:-.02em;
}
.hero-sub{margin-top:18px;max-width:560px;font-size:16.5px;line-height:1.85;color:var(--paper-dim)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;margin-top:34px;font-size:13px;color:var(--paper-dim)}
.hero-meta li{display:flex;align-items:center}
.hero-meta li+li::before{content:"";width:1px;height:12px;background:var(--line-strong);margin:0 14px}
.hero-meta li::marker{content:none}

/* ---------- section base ---------- */
.section{padding:96px 0}
.section.alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.015em}
.section-lead{margin-top:10px;font-size:14.5px;color:var(--paper-dim);max-width:640px}
.section-tools{display:flex;align-items:center;gap:12px}
.text-link{
  font-size:14px;font-weight:500;color:var(--brand-300);
  border-bottom:1px solid rgba(111,227,210,.45);padding-bottom:2px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.text-link:hover{color:var(--paper);border-color:var(--paper)}
.rail-btn{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);background:var(--ink-700);color:var(--paper);
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.rail-btn:hover{border-color:var(--brand-500);color:var(--brand-300);transform:translateY(-1px)}
.rail-btn .svg-ico{font-size:15px}

/* ---------- rail ---------- */
.rail{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 0 12px;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{display:none}
.rail-card{
  flex:0 0 260px;scroll-snap-align:start;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.rail-card:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:0 0 0 3px rgba(15,183,156,.12)}
.rail-thumb{aspect-ratio:3/4;overflow:hidden;background:var(--ink-800);position:relative}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.rail-card:hover .rail-thumb img{transform:scale(1.04)}
.rail-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,17,15,0) 45%,rgba(8,17,15,.75) 100%);
}
.rail-body{padding:16px 18px 18px}
.rail-body h3{font-size:16px;font-weight:600;line-height:1.45}
.rail-body p{margin-top:8px;font-size:13px;line-height:1.7;color:var(--paper-dim);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tag{
  display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;
  letter-spacing:.04em;color:var(--brand-300);background:rgba(15,183,156,.12);
  border:1px solid rgba(15,183,156,.24);
}
.tag-accent{color:var(--accent);background:rgba(255,106,61,.12);border-color:rgba(255,106,61,.28)}

/* ---------- hot grid ---------- */
.hot-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:24px;align-items:stretch}
.hot-main{
  position:relative;display:block;overflow:hidden;border-radius:var(--radius-card);
  border:1px solid var(--line);background:var(--ink-700);min-height:360px;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),transform .24s var(--ease);
}
.hot-main:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:0 0 0 3px rgba(15,183,156,.12)}
.hot-main img{width:100%;height:100%;min-height:360px;object-fit:cover;transition:transform .32s var(--ease)}
.hot-main:hover img{transform:scale(1.03)}
.hot-main::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,17,15,.15) 0%,rgba(8,17,15,.55) 52%,rgba(8,17,15,.94) 100%);
}
.hot-main .hot-copy{position:absolute;left:0;right:0;bottom:0;padding:28px;z-index:2}
.hot-copy h3{margin-top:14px;font-size:clamp(20px,2.2vw,27px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.hot-copy p{margin-top:10px;font-size:14px;color:var(--paper-dim);max-width:460px;line-height:1.8}
.hot-side{display:flex;flex-direction:column;gap:16px}
.hot-mini{
  display:flex;gap:14px;align-items:center;padding:12px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:12px;flex:1;
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.hot-mini:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:0 0 0 3px rgba(15,183,156,.12)}
.hot-mini .mini-img{width:104px;height:70px;flex:0 0 auto;border-radius:8px;overflow:hidden;background:var(--ink-800)}
.hot-mini .mini-img img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.hot-mini:hover .mini-img img{transform:scale(1.04)}
.hot-mini .mini-copy h4{font-size:15px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.hot-mini .mini-copy span{display:block;margin-top:8px;font-size:12.5px;color:var(--paper-dim)}

/* ---------- checks strip ---------- */
.checks{border-top:1px solid var(--line)}
.check-row{
  display:grid;grid-template-columns:56px 1fr 1.15fr;gap:24px;align-items:start;
  padding:24px 8px;border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease),border-color .24s var(--ease);
}
.check-row:hover{background:rgba(15,183,156,.05);border-color:rgba(15,183,156,.4)}
.check-num{font-family:var(--font-num);font-size:14px;font-weight:500;color:var(--brand-300);letter-spacing:.04em;padding-top:2px}
.check-row h3{font-size:17px;font-weight:600;line-height:1.5}
.check-row p{font-size:14.5px;color:var(--paper-dim);line-height:1.85}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--ink-700);
  border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.news-card:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:0 0 0 3px rgba(15,183,156,.12)}
.news-card h3{
  margin-top:14px;font-size:17.5px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .news-desc{
  margin-top:10px;font-size:14px;line-height:1.8;color:var(--paper-dim);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--paper-dim);
}
.news-foot .read{color:var(--brand-300);font-weight:500;transition:color .16s var(--ease)}
.news-foot .read:hover{color:var(--paper)}
.skeleton{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--ink-700);padding:22px;height:220px}
.skeleton .sk-line{height:12px;border-radius:6px;background:rgba(245,242,234,.08);margin-bottom:14px}
.skeleton .sk-line.w40{width:40%}
.skeleton .sk-line.w80{width:80%}
.skeleton .sk-line.w60{width:60%}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:56px 24px;border:1px dashed var(--line-strong);border-radius:var(--radius-card);
  background:var(--ink-800);text-align:center;
}
.empty-state .svg-ico{font-size:56px;color:var(--line-strong);stroke-width:1.2}
.empty-state p{margin-top:16px;font-size:15px;color:var(--paper-dim)}
.empty-state a{margin-top:10px;font-size:13px;color:var(--brand-300);border-bottom:1px solid rgba(111,227,210,.45)}

/* ---------- boards ---------- */
.boards{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.board{background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px}
.board-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:6px}
.board-head h3{font-size:18px;font-weight:600}
.board-tabs{display:flex;gap:8px;margin:16px 0 8px}
.tab{
  padding:6px 14px;border-radius:999px;font-size:12.5px;
  color:var(--paper-dim);border:1px solid var(--line);transition:all .16s var(--ease);
}
.tab.active,.tab:hover{color:var(--brand-300);border-color:rgba(15,183,156,.45);background:rgba(15,183,156,.1)}
.mini-row{
  display:flex;align-items:center;gap:14px;padding:14px 0;border-top:1px solid var(--line);
  transition:transform .24s var(--ease);
}
.mini-row:hover{transform:translateX(3px)}
.mini-thumb{width:40px;height:56px;flex:0 0 auto;border-radius:8px;overflow:hidden;background:var(--ink-700)}
.mini-thumb img{width:100%;height:100%;object-fit:cover}
.mini-row .mini-text h4{font-size:14.5px;font-weight:600;line-height:1.5}
.mini-row .mini-text span{display:block;margin-top:4px;font-size:12.5px;color:var(--paper-dim)}
.mini-row .arrow{margin-left:auto;color:var(--line-strong);transition:color .16s var(--ease),transform .16s var(--ease)}
.mini-row:hover .arrow{color:var(--brand-300);transform:translateX(2px)}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--paper);color:var(--ink-900);border-radius:20px;
  padding:56px 32px;text-align:center;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);line-height:1.28;font-weight:700;letter-spacing:-.015em}
.cta-band p{margin:16px auto 0;max-width:620px;font-size:15px;line-height:1.85;color:#4A544F}
.cta-band .btn{margin-top:28px}
.cta-note{margin-top:16px;font-size:12px;color:#6C7772;letter-spacing:.02em}

/* ---------- faq ---------- */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17px;font-weight:600;line-height:1.6;text-align:left;
  color:var(--paper);transition:color .16s var(--ease);
}
.faq-q:hover{color:var(--brand-300)}
.faq-q .sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-strong);display:grid;place-items:center;
  font-size:15px;font-weight:500;color:var(--brand-300);
  transition:transform .24s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.faq-item.open .faq-q .sign{transform:rotate(180deg);border-color:var(--brand-500);background:rgba(15,183,156,.12)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 4px 24px;font-size:15px;line-height:1.85;color:var(--paper-dim);max-width:780px}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:64px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:13.5px;line-height:1.85;color:var(--paper-dim);max-width:300px}
.footer-col h3{
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--paper);
  margin:0 0 16px;text-transform:none;
}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--paper-dim);transition:color .16s var(--ease)}
.footer-col a:hover{color:var(--paper)}
.footer-bottom{
  margin-top:48px;border-top:1px dashed var(--line);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;font-size:12.5px;color:var(--paper-dim);
}
.footer-bottom span{line-height:1.8}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .nav-search{width:200px}
  .nav-links{gap:20px}
}
@media (max-width:1023px){
  .nav-links,.nav-search,.nav-quick{display:none}
  .nav-toggle{display:flex}
  .hero{min-height:auto;padding:72px 0 64px}
  .hero-bg{background-position:center top}
  .hero::before{background:linear-gradient(180deg,rgba(8,17,15,.82) 0%,rgba(8,17,15,.94) 55%,rgba(8,17,15,.98) 100%)}
  .section{padding:72px 0}
  .hot-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .boards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .check-row{grid-template-columns:40px 1fr;gap:8px 16px}
  .check-row p{grid-column:2}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-inner{height:62px;gap:14px}
  .logo-text{font-size:14.5px}
  .logo-sub{font-size:11px}
  .hero{padding:56px 0 52px}
  .hero h1{font-size:clamp(26px,7vw,34px)}
  .hero-sub{font-size:15px}
  .hero-meta{font-size:12.5px;gap:0}
  .hero-meta li+li::before{margin:0 10px}
  .section{padding:56px 0}
  .section-head{margin-bottom:24px}
  .rail-card{flex:0 0 232px}
  .rail-btn{display:none}
  .news-grid{grid-template-columns:1fr}
  .hot-main img,.hot-main{min-height:260px}
  .hot-main .hot-copy{padding:20px}
  .cta-band{padding:40px 20px;border-radius:16px}
  .faq-q{font-size:15.5px;padding:18px 2px}
  .faq-a-inner{font-size:14.5px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:56px;padding-top:48px}
  .hero-actions .btn{flex:1 1 auto}
}
@media (max-width:519px){
  .hot-mini .mini-img{width:88px;height:62px}
  .rail-card{flex:0 0 210px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .rail-card:hover,.hot-mini:hover,.news-card:hover,.hot-main:hover,.mini-row:hover{transform:none !important}
}

/* roulang page: article */
:root{
  --ink-900:#08110F;
  --ink-800:#0E1A17;
  --ink-700:#16241F;
  --line:rgba(245,242,234,.12);
  --line-strong:rgba(245,242,234,.24);
  --paper:#F5F2EA;
  --paper-dim:#A9B5AF;
  --brand-500:#0FB79C;
  --brand-300:#6FE3D2;
  --brand-700:#0A8571;
  --accent:#FF6A3D;
  --accent-soft:rgba(255,106,61,.12);
  --ok:#35C48A;
  --warn:#E8B44A;
  --err:#FF6A3D;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --glow:0 0 0 3px rgba(15,183,156,.12);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  --t-fast:160ms;
  --t-mid:240ms;
  --t-slow:320ms;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}

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

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(8,17,15,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:32px;
  height:32px;
  color:var(--brand-500);
  display:inline-flex;
  transition:transform var(--t-mid) var(--ease);
}
.logo:hover .logo-mark{transform:translateY(-1px) rotate(-4deg)}
.logo-text{
  display:inline-flex;
  align-items:center;
  font-weight:700;
  font-size:17px;
  letter-spacing:.02em;
  color:var(--paper);
  white-space:nowrap;
}
.logo-divider{width:1px;height:14px;background:var(--line-strong);margin:0 8px}
.logo-sub{font-size:12px;color:var(--paper-dim);letter-spacing:.14em;font-weight:500}

.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:10px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 12px;
  font-size:14px;
  font-weight:500;
  color:var(--paper-dim);
  border-radius:8px;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--paper);background:rgba(245,242,234,.06)}
.nav-link.active{color:var(--paper)}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand-500);
}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:240px;
  height:40px;
  padding:0 10px;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:10px;
  transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);
}
.command-search:focus-within{border-color:var(--brand-500);box-shadow:var(--glow)}
.command-search svg{flex-shrink:0;color:var(--paper-dim);width:16px;height:16px}
.command-search input{
  flex:1;
  min-width:0;
  background:transparent;
  border:0;
  outline:none;
  font-size:13px;
  color:var(--paper);
}
.command-search input::placeholder{color:var(--paper-dim)}
.kbd{
  flex-shrink:0;
  font-family:var(--mono);
  font-size:11px;
  color:var(--paper-dim);
  border:1px solid var(--line);
  border-radius:5px;
  padding:1px 6px;
  line-height:1.5;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:background var(--t-fast) var(--ease),color var(--t-fast) var(--ease),
             border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease),
             box-shadow var(--t-fast) var(--ease);
}
.btn:disabled,.btn[disabled]{opacity:.4;pointer-events:none}
.btn-primary{background:var(--accent);color:#08110F}
.btn-primary:hover{background:#FF7C55;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:#E85B31}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--paper)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-300)}
.btn-ghost:active{background:rgba(15,183,156,.08)}
.btn-sm{padding:9px 18px;font-size:14px}

.menu-toggle{
  display:none;
  width:40px;
  height:40px;
  border-radius:10px;
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  color:var(--paper);
}
.menu-toggle:hover{border-color:var(--brand-500);color:var(--brand-300)}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;
  inset:0 0 0 auto;
  width:88%;
  max-width:360px;
  z-index:120;
  background:var(--ink-800);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform var(--t-slow) var(--ease);
  display:flex;
  flex-direction:column;
  padding:20px;
  gap:8px;
  overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.drawer-link{
  display:flex;
  align-items:center;
  min-height:56px;
  padding:0 12px;
  border-radius:10px;
  font-size:15px;
  font-weight:500;
  color:var(--paper);
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{background:rgba(15,183,156,.08);color:var(--brand-300)}
.drawer-cta{margin-top:auto;padding-top:20px}
.drawer-cta .btn{width:100%}
.drawer-backdrop{
  position:fixed;
  inset:0;
  background:rgba(4,8,7,.6);
  z-index:110;
  opacity:0;
  pointer-events:none;
  transition:opacity var(--t-mid) var(--ease);
}
.drawer-backdrop.open{opacity:1;pointer-events:auto}

/* ---------- 文章主体 ---------- */
.page-main{padding:44px 0 0}
.article-narrow{max-width:820px;margin:0 auto}

.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:12px;
  color:var(--paper-dim);
  letter-spacing:.02em;
}
.breadcrumb a{color:var(--paper-dim);transition:color var(--t-fast) var(--ease)}
.breadcrumb a:hover{color:var(--brand-300)}
.breadcrumb .sep{color:rgba(245,242,234,.28)}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.06em;
  background:rgba(15,183,156,.12);
  color:var(--brand-300);
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}

.article-head{padding-top:20px}
.article-head h1{
  margin-top:16px;
  font-size:clamp(30px,4.2vw,44px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--paper);
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
  font-size:13px;
  color:var(--paper-dim);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(245,242,234,.32)}
.article-meta .mono{font-family:var(--mono);font-weight:500}

.rule{
  height:1px;
  background:var(--line);
  margin:28px 0 36px;
}

.article-body{
  font-size:17.5px;
  line-height:1.9;
  color:#E7E9E3;
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;
  margin:44px 0 16px;
  padding-left:14px;
  font-size:26px;
  line-height:1.35;
  font-weight:700;
  color:var(--paper);
  letter-spacing:-.01em;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.24em;
  width:3px;
  height:1.06em;
  border-radius:2px;
  background:var(--brand-500);
}
.article-body h3{
  margin:30px 0 12px;
  font-size:20px;
  line-height:1.45;
  font-weight:600;
  color:var(--paper);
}
.article-body h4{
  margin:24px 0 10px;
  font-size:17px;
  font-weight:600;
  color:var(--paper);
}
.article-body blockquote{
  margin:24px 0;
  padding:20px;
  background:rgba(245,242,234,.06);
  border-left:3px solid var(--brand-500);
  border-radius:0 10px 10px 0;
  color:var(--paper-dim);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:24px}
.article-body ul li{list-style:disc;margin:8px 0}
.article-body ol li{list-style:decimal;margin:8px 0}
.article-body li::marker{color:var(--brand-500)}
.article-body a{
  color:var(--brand-300);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.article-body a:hover{color:var(--brand-500)}
.article-body img{
  width:100%;
  height:auto;
  border-radius:var(--radius-img);
  margin:24px 0 10px;
  background:var(--ink-800);
}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--paper-dim);line-height:1.7}
.article-body code{
  font-family:var(--mono);
  font-size:.9em;
  background:rgba(245,242,234,.08);
  padding:2px 6px;
  border-radius:6px;
}
.article-body pre{
  margin:22px 0;
  padding:16px 18px;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow-x:auto;
  font-size:14px;
  line-height:1.8;
}
.article-body pre code{background:none;padding:0}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:22px 0;
  font-size:15px;
}
.article-body th,.article-body td{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.article-body th{color:var(--paper);font-weight:600;background:rgba(245,242,234,.04)}
.article-body hr{border:0;border-top:1px dashed var(--line-strong);margin:32px 0}

/* 空态 */
.empty-state{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  padding:56px 20px;
  text-align:center;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--ink-800);
}
.empty-state svg{width:64px;height:64px;color:var(--line-strong)}
.empty-state p{font-size:15px;color:var(--paper-dim)}
.empty-state a{
  font-size:13px;
  color:var(--brand-300);
  text-decoration:underline;
  text-underline-offset:4px;
}
.empty-state a:hover{color:var(--brand-500)}

/* 文末区块 */
.article-foot{margin-top:56px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:20px;
}
.section-head h2{
  font-size:22px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--paper);
}
.section-head a{
  font-size:13px;
  color:var(--paper-dim);
  text-decoration:underline;
  text-underline-offset:4px;
  transition:color var(--t-fast) var(--ease);
}
.section-head a:hover{color:var(--brand-300)}

.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.related-card{
  display:flex;
  gap:12px;
  padding:14px;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:border-color var(--t-mid) var(--ease),transform var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);
}
.related-card:hover{
  border-color:var(--brand-500);
  transform:translateY(-2px);
  box-shadow:var(--glow);
}
.related-thumb{
  flex-shrink:0;
  width:76px;
  height:76px;
  border-radius:10px;
  overflow:hidden;
  background:linear-gradient(135deg,var(--ink-800),#0C3A33);
}
.related-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform var(--t-slow) var(--ease);
}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-info{min-width:0;display:flex;flex-direction:column;gap:4px}
.related-info strong{
  font-size:14.5px;
  font-weight:600;
  color:var(--paper);
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-info span{font-size:12px;color:var(--paper-dim);letter-spacing:.04em}

.back-row{margin-top:28px}
.ghost-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--paper);
  padding-bottom:4px;
  border-bottom:1px solid var(--brand-500);
  transition:color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.ghost-link:hover{color:var(--brand-300);border-color:var(--brand-300)}

/* CTA 带 */
.cta-band{
  margin-top:64px;
  background:var(--paper);
  color:#0B1512;
  border-radius:18px;
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-band h2{font-size:26px;line-height:1.35;font-weight:700;letter-spacing:-.01em}
.cta-band p{margin-top:10px;font-size:15px;line-height:1.8;color:#3C4A45;max-width:560px}
.cta-band .btn{flex-shrink:0}
.cta-note{margin-top:12px;font-size:12px;color:#5E6D66}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:88px;
  border-top:1px solid var(--line);
  background:var(--ink-900);
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:32px;
}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:var(--paper-dim);
  max-width:320px;
}
.footer-col h3{
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  color:rgba(245,242,234,.55);
  margin-bottom:14px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{
  font-size:14px;
  color:var(--paper-dim);
  transition:color var(--t-fast) var(--ease);
}
.footer-col a:hover{color:var(--paper)}
.footer-bottom{
  margin-top:40px;
  padding:20px 0 28px;
  border-top:1px dashed var(--line-strong);
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:12.5px;
  color:rgba(245,242,234,.45);
}

/* ---------- 动效 ---------- */
.fade-up{animation:fadeUp var(--t-slow) var(--ease) both}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* ---------- 断点 ---------- */
@media (max-width:1279px){
  .command-search{width:200px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .command-search{display:none}
  .menu-toggle{display:inline-flex}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
  .article-body{font-size:17px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .header-inner{height:64px;gap:12px}
  .logo-text{font-size:16px}
  .logo-divider{margin:0 6px}
  .logo-sub{font-size:11px;letter-spacing:.1em}
  .header-actions .btn-primary{display:none}
  .page-main{padding-top:28px}
  .article-body{font-size:16.5px;line-height:1.85}
  .article-body h2{font-size:22px;margin-top:36px}
  .article-body h3{font-size:18px}
  .rule{margin:22px 0 28px}
  .related-grid{grid-template-columns:1fr}
  .cta-band{border-radius:14px;padding:26px 20px;margin-top:48px}
  .cta-band h2{font-size:21px}
  .cta-band .btn{width:100%}
  .site-footer{margin-top:64px;padding-top:44px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px;font-size:12px}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .article-head h1{font-size:26px}
  .breadcrumb{font-size:11.5px}
  .related-thumb{width:64px;height:64px}
  .article-body blockquote{padding:16px}
}

/* roulang page: category1 */
:root{
  --ink-900:#08110F;
  --ink-800:#0E1A17;
  --ink-700:#16241F;
  --line:rgba(245,242,234,.12);
  --line-strong:rgba(245,242,234,.24);
  --paper:#F5F2EA;
  --paper-dim:#A9B5AF;
  --brand-500:#0FB79C;
  --brand-300:#6FE3D2;
  --brand-700:#0A8571;
  --accent:#FF6A3D;
  --ok:#35C48A;
  --warn:#E8B44A;
  --err:#FF6A3D;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --shadow-focus:0 0 0 3px rgba(15,183,156,.12);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.24;letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:767px){.container{padding:0 20px}}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,17,15,.85);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{display:grid;place-items:center;width:34px;height:34px;color:var(--brand-300)}
.logo-mark svg{width:100%;height:100%}
.logo-text{display:inline-flex;align-items:center;font-size:16px;font-weight:700;letter-spacing:.02em;color:var(--paper);white-space:nowrap}
.logo-divider{width:1px;height:14px;background:var(--line-strong);margin:0 8px;display:inline-block}
.logo-sub{font-size:13px;font-weight:500;color:var(--paper-dim);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-link{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--paper-dim);
  transition:color .16s var(--ease),background .16s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(245,242,234,.06)}
.nav-link.active{color:var(--paper)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;
  background:var(--brand-500);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 10px 0 12px;
  background:var(--ink-800);border:1px solid var(--line);border-radius:10px;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.cmd-search:focus-within{border-color:var(--brand-500);box-shadow:var(--shadow-focus)}
.cmd-search svg{width:16px;height:16px;flex:0 0 auto;color:var(--paper-dim)}
.cmd-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
  color:var(--paper);font-size:13px;outline:none;
}
.cmd-search input::placeholder{color:#6E7C77}
.cmd-key{
  flex:0 0 auto;font-family:var(--font-mono);font-size:11px;line-height:1;
  color:var(--paper-dim);padding:4px 6px;border:1px solid var(--line);border-radius:6px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  transition:transform .16s var(--ease),background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#0B1512}
.btn-primary:hover{background:#FF7C54;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:#F05E32}
.btn-outline{border:1px solid var(--line-strong);color:var(--paper);background:transparent}
.btn-outline:hover{border-color:var(--brand-500);color:var(--brand-300)}
.btn-ghost{color:var(--paper-dim);padding:12px 4px}
.btn-ghost:hover{color:var(--brand-300)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.btn-sm{padding:9px 16px;font-size:14px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--line-strong);border-radius:10px;
  color:var(--paper);
}
.nav-toggle:hover{border-color:var(--brand-500);color:var(--brand-300)}
.nav-toggle svg{width:20px;height:20px}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,9,8,.6);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;z-index:80;
  background:var(--ink-800);border-left:1px solid var(--line);
  padding:20px 20px 24px;display:flex;flex-direction:column;gap:8px;
  transform:translateX(100%);transition:transform .24s var(--ease);
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;color:var(--paper-dim)}
.drawer-close:hover{color:var(--brand-300);border-color:var(--brand-500)}
.drawer a.drawer-link{
  display:flex;align-items:center;height:56px;padding:0 8px;
  font-size:15px;color:var(--paper-dim);border-bottom:1px solid var(--line);
}
.drawer a.drawer-link:hover{color:var(--brand-300)}
.drawer a.drawer-link.active{color:var(--brand-300)}
.drawer-cta{margin-top:auto;padding-top:20px}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:20px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--paper-dim);letter-spacing:.04em}
.crumb a{color:var(--paper-dim)}
.crumb a:hover{color:var(--brand-300)}
.crumb .sep{color:#4C5B56}

/* ---------- 分类 Hero ---------- */
.page-hero{position:relative;margin-top:20px;border-radius:18px;overflow:hidden;border:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center 32%;
  transform:scale(1.02);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,17,15,.95) 12%,rgba(8,17,15,.78) 52%,rgba(8,17,15,.42) 100%);
}
.hero-inner{position:relative;z-index:2;padding:52px 48px;max-width:760px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;
  background:rgba(15,183,156,.14);color:var(--brand-300);
  font-size:12px;letter-spacing:.08em;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--brand-500)}
.page-hero h1{
  margin:18px 0 14px;
  font-size:clamp(28px,3.4vw,42px);
  letter-spacing:-.02em;
}
.page-hero h1 .hl{color:var(--brand-300)}
.page-hero .hero-desc{font-size:15px;line-height:1.85;color:var(--paper-dim);max-width:600px}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:24px;font-size:13px;color:var(--paper-dim)}
.hero-meta span{display:inline-flex;align-items:center;gap:8px}
.hero-meta .vline{width:1px;height:12px;background:var(--line-strong)}

/* ---------- 通用区块 ---------- */
.section{padding:72px 0}
.section-head{margin-bottom:36px;max-width:720px}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--brand-300);
  margin-bottom:12px;
}
.section-head h2{font-size:clamp(24px,2.6vw,32px);letter-spacing:-.02em}
.section-head p{margin-top:12px;font-size:15px;color:var(--paper-dim);line-height:1.85}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:27px;top:16px;bottom:26px;width:1px;
  background:linear-gradient(180deg,rgba(15,183,156,.65),rgba(15,183,156,.08));
}
.tl-item{position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);gap:24px;padding-bottom:22px}
.tl-num{
  position:relative;z-index:1;width:56px;height:56px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--ink-800);border:1px solid var(--line-strong);
  font-family:var(--font-mono);font-size:15px;font-weight:600;color:var(--brand-300);
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.tl-card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;
  transition:border-color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}
.tl-item:hover .tl-num{border-color:var(--brand-500);box-shadow:var(--shadow-focus)}
.tl-item:hover .tl-card{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:var(--shadow-focus)}
.tl-top{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:8px}
.tl-top h3{font-size:19px;font-weight:600}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  font-size:12px;letter-spacing:.04em;
  background:rgba(15,183,156,.12);color:var(--brand-300);
}
.tag-accent{background:rgba(255,106,61,.14);color:#FF9A78}
.tag-mono{font-family:var(--font-mono);letter-spacing:.02em}
.tl-card p{font-size:15px;line-height:1.85;color:var(--paper-dim)}
.tl-card p + p{margin-top:8px}
.tl-card strong{color:var(--paper);font-weight:600}

/* ---------- 准备清单（图文） ---------- */
.prep-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center}
.prep-figure{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-800);
  aspect-ratio:4/3;
}
.prep-figure img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease)}
.prep-figure:hover img{transform:scale(1.04)}
.prep-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:32px 18px 14px;
  font-size:12px;color:var(--paper);letter-spacing:.04em;
  background:linear-gradient(180deg,rgba(8,17,15,0),rgba(8,17,15,.9));
}
.checklist{display:grid;gap:14px;margin-top:22px}
.checklist li{
  display:grid;grid-template-columns:26px minmax(0,1fr);gap:12px;align-items:start;
  padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--ink-800);
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.checklist li:hover{border-color:var(--brand-500);background:var(--ink-700)}
.check-ico{
  width:22px;height:22px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(15,183,156,.5);color:var(--brand-300);margin-top:3px;
}
.check-ico svg{width:12px;height:12px}
.checklist h4{font-size:15px;font-weight:600;margin-bottom:2px}
.checklist p{font-size:13.5px;color:var(--paper-dim);line-height:1.75}

/* ---------- 横向要点条 ---------- */
.facts{border-top:1px solid var(--line);margin-top:8px}
.fact-row{
  display:grid;grid-template-columns:120px minmax(0,1fr) auto;gap:24px;align-items:center;
  padding:24px 12px;border-bottom:1px solid var(--line);
  transition:background .16s var(--ease);
}
.fact-row:hover{background:rgba(15,183,156,.05)}
.fact-row .f-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--brand-300)}
.fact-row h3{font-size:17px;font-weight:600;margin-bottom:4px}
.fact-row p{font-size:14px;color:var(--paper-dim);line-height:1.8}
.fact-row .f-value{font-family:var(--font-mono);font-size:13px;color:var(--paper-dim);white-space:nowrap}

/* ---------- FAQ ---------- */
.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:20px;
  padding:22px 4px;text-align:left;font-size:17px;font-weight:600;color:var(--paper);
  transition:color .16s var(--ease);
}
.faq-q:hover{color:var(--brand-300)}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;display:grid;place-items:center;
  border:1px solid var(--line-strong);border-radius:50%;
  font-size:16px;line-height:1;color:var(--paper-dim);
  transition:transform .24s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--brand-500);color:var(--brand-300)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{padding:0 4px 22px;font-size:15px;line-height:1.85;color:var(--paper-dim);max-width:820px}

/* ---------- CTA ---------- */
.cta-wrap{padding:8px 0 80px}
.cta-card{
  position:relative;overflow:hidden;
  border-radius:18px;border:1px solid var(--line);
  background:var(--ink-800);
  padding:48px 48px 44px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
}
.cta-card::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,183,156,.16),rgba(15,183,156,0) 66%);
}
.cta-card h2{font-size:clamp(22px,2.4vw,28px);position:relative;z-index:1}
.cta-card p{margin-top:12px;font-size:14.5px;color:var(--paper-dim);max-width:560px;line-height:1.85;position:relative;z-index:1}
.cta-actions{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.cta-note{font-size:12px;color:#7C8A84;letter-spacing:.02em}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--ink-800);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:var(--paper-dim);max-width:300px}
.footer-col h3{
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--paper);
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--paper-dim);transition:color .16s var(--ease)}
.footer-col a:hover{color:var(--paper)}
.footer-bottom{
  margin-top:44px;padding:20px 0 28px;
  border-top:1px dashed var(--line-strong);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:#7C8A84;
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .cmd-search{width:200px}
}
@media (max-width:1023px){
  .nav-links,.cmd-search,.header-login{display:none}
  .nav-toggle{display:inline-flex}
  .prep-grid{grid-template-columns:1fr;gap:28px}
  .cta-card{grid-template-columns:1fr;padding:36px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero-inner{padding:44px 32px}
  .fact-row{grid-template-columns:100px minmax(0,1fr);gap:16px}
  .fact-row .f-value{grid-column:2;justify-self:start}
}
@media (max-width:767px){
  .header-inner{height:60px;gap:12px}
  .logo-text{font-size:14px}
  .logo-sub{font-size:12px}
  .header-actions .btn-primary{padding:10px 16px;font-size:14px}
  .section{padding:56px 0}
  .page-hero{border-radius:14px;margin-top:16px}
  .hero-inner{padding:34px 22px}
  .page-hero .hero-desc{font-size:14px}
  .hero-meta{font-size:12px;gap:10px}
  .tl-item{grid-template-columns:44px minmax(0,1fr);gap:16px}
  .tl-num{width:44px;height:44px;font-size:13px}
  .timeline::before{left:21px}
  .tl-card{padding:18px}
  .tl-top h3{font-size:17px}
  .fact-row{grid-template-columns:1fr;gap:8px;padding:20px 4px}
  .fact-row .f-value{grid-column:1}
  .faq-q{font-size:15.5px;padding:18px 2px}
  .cta-wrap{padding-bottom:56px}
  .cta-card{padding:28px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .logo-divider{display:none}
  .logo-sub{display:none}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --ink-900:#08110F;
  --ink-800:#0E1A17;
  --ink-700:#16241F;
  --line:rgba(245,242,234,.12);
  --line-strong:rgba(245,242,234,.24);
  --line-dash:rgba(245,242,234,.16);
  --paper:#F5F2EA;
  --paper-dim:#A9B5AF;
  --brand-500:#0FB79C;
  --brand-300:#6FE3D2;
  --brand-700:#0A8571;
  --accent:#FF6A3D;
  --ok:#35C48A;
  --warn:#E8B44A;
  --err:#FF6A3D;
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono: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(--ink-900);
  color:var(--paper);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-300);text-decoration:none;transition:color .16s var(--ease);}
a:hover{color:var(--paper);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.01em;}
h1{font-size:clamp(30px,4.2vw,50px);font-weight:700;letter-spacing:-.02em;}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;}
h3{font-size:22px;font-weight:600;}
h4{font-size:17px;font-weight:600;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--font-mono);font-weight:500;letter-spacing:.02em;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,17,15,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--paper);text-decoration:none;flex:none;}
.logo:hover{color:var(--paper);}
.logo-mark{width:32px;height:32px;color:var(--brand-500);display:inline-flex;flex:none;}
.logo-mark svg{width:100%;height:100%;}
.logo-text{display:inline-flex;align-items:center;gap:8px;font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.logo-divider{width:1px;height:14px;background:var(--line-strong);}
.logo-sub{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--brand-300);}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:8px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--paper-dim);
  transition:color .16s var(--ease),background .16s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--paper);background:rgba(245,242,234,.05);}
.nav-link.active{color:var(--paper);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand-500);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;width:236px;padding:0 10px;
  background:var(--ink-800);border:1px solid var(--line);border-radius:10px;
  color:var(--paper-dim);font-size:13px;cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.search-box:hover{border-color:var(--brand-500);color:var(--paper);}
.search-box .search-ico{width:16px;height:16px;flex:none;color:var(--brand-300);}
.search-box .search-text{flex:1;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.search-box .kbd{
  font-family:var(--font-mono);font-size:11px;line-height:1;
  padding:4px 6px;border:1px solid var(--line-strong);border-radius:5px;color:var(--paper-dim);
}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:var(--ink-800);border:1px solid var(--line);border-radius:10px;color:var(--paper);cursor:pointer;
  transition:border-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand-500);}
.nav-toggle svg{width:20px;height:20px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.2;text-align:center;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--ink-900);}
.btn-primary:hover{background:#ff7d55;color:var(--ink-900);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);background:#e95a30;}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--paper);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-300);}
.btn-ghost:active{background:rgba(15,183,156,.08);}
.btn-sm{min-height:40px;padding:10px 18px;font-size:14px;}
.btn:disabled,.btn.is-disabled{opacity:.4;pointer-events:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--brand-300);border-bottom:1px solid rgba(111,227,210,.4);padding-bottom:2px;
}
.link-arrow:hover{color:var(--paper);border-bottom-color:var(--paper);}

/* ---------- badge / eyebrow ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  background:rgba(15,183,156,.12);color:var(--brand-300);
}
.badge-accent{background:rgba(255,106,61,.12);color:var(--accent);}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--paper-dim);letter-spacing:.02em;}
.crumbs a{color:var(--paper-dim);}
.crumbs a:hover{color:var(--brand-300);}
.crumbs .sep{color:rgba(169,181,175,.6);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(90deg,rgba(8,17,15,.97) 0%,rgba(8,17,15,.88) 46%,rgba(8,17,15,.6) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(245,242,234,.28) 1px,transparent 1px);
  background-size:4px 4px;opacity:.05;
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;
  padding:56px 0 60px;
}
.hero-copy .badge{margin-bottom:18px;}
.hero-copy h1{margin-bottom:16px;}
.hero-copy h1 .h1-key{display:block;font-size:.62em;font-weight:600;color:var(--brand-300);letter-spacing:.04em;margin-bottom:10px;}
.hero-lede{font-size:16px;line-height:1.85;color:var(--paper-dim);max-width:52ch;}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px;font-size:13px;color:var(--paper-dim);}
.hero-meta span{display:inline-flex;align-items:center;gap:8px;}
.hero-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--brand-500);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-media{
  position:relative;border-radius:16px;overflow:hidden;
  border:1px solid var(--line-strong);background:var(--ink-800);
  aspect-ratio:16/11;box-shadow:0 18px 48px rgba(0,0,0,.35);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media .media-tag{
  position:absolute;left:14px;bottom:14px;
  padding:8px 12px;border-radius:10px;
  background:rgba(8,17,15,.82);border:1px solid var(--line-strong);
  font-size:12px;color:var(--brand-300);letter-spacing:.06em;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}

/* ---------- sections ---------- */
.section{padding:72px 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head .badge{margin-bottom:14px;}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--paper-dim);font-size:15.5px;line-height:1.85;}

/* ---------- spec layout ---------- */
.spec-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:start;}
.stack{display:grid;gap:24px;}
.spec-card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.spec-card:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:0 0 0 3px rgba(15,183,156,.12);}
.spec-card .media{border-radius:var(--r-img);overflow:hidden;background:var(--ink-800);aspect-ratio:16/9;}
.spec-card .media img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.spec-card:hover .media img{transform:scale(1.04);}
.spec-card h3{font-size:20px;margin:18px 0 10px;}
.spec-card p{color:var(--paper-dim);font-size:15px;line-height:1.85;}
.spec-card .media+.card-kicker{margin-top:16px;}
.card-kicker{font-size:12px;letter-spacing:.1em;color:var(--brand-300);font-weight:600;}
.spec-card.flip .media{order:2;margin-top:18px;}
.spec-card.flip h3{margin-top:0;}
.spec-card .mini-list{display:grid;gap:10px;margin-top:16px;}
.spec-card .mini-list li{display:flex;gap:10px;font-size:14.5px;color:var(--paper-dim);line-height:1.7;}
.spec-card .mini-list li::before{content:"";flex:none;width:6px;height:6px;margin-top:9px;border-radius:50%;border:1.5px solid var(--brand-500);}

.panel{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;
}
.panel-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:8px;}
.panel-head h3{font-size:18px;}
.panel-head span{font-size:12px;color:var(--paper-dim);letter-spacing:.06em;}
.spec-list{margin:0;border-top:1px solid var(--line);}
.spec-row{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line-dash);}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{color:var(--paper-dim);font-size:13px;letter-spacing:.04em;line-height:1.7;}
.spec-row dd{margin:0;color:var(--paper);font-size:15px;line-height:1.7;}
.spec-row dd em{font-style:normal;color:var(--brand-300);}

/* ---------- security grid ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.sec-item{
  display:flex;gap:16px;padding:22px;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.sec-item:hover{border-color:var(--brand-500);transform:translateY(-2px);box-shadow:0 0 0 3px rgba(15,183,156,.12);}
.sec-ico{
  flex:none;width:42px;height:42px;border-radius:10px;
  display:grid;place-items:center;background:rgba(15,183,156,.12);color:var(--brand-300);
}
.sec-ico svg{width:20px;height:20px;}
.sec-item h4{margin-bottom:6px;}
.sec-item p{color:var(--paper-dim);font-size:14.5px;line-height:1.8;}

/* ---------- steps ---------- */
.steps-row{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{padding-top:22px;border-top:1px solid var(--line-strong);transition:border-color .24s var(--ease);}
.step:hover{border-top-color:var(--brand-500);}
.step-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.16em;color:var(--brand-300);display:block;margin-bottom:10px;}
.step h4{margin-bottom:8px;font-size:17px;}
.step p{color:var(--paper-dim);font-size:14.5px;line-height:1.8;}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.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:16px;
  padding:20px 0;background:none;border:0;cursor:pointer;
  color:var(--paper);font-size:17px;font-weight:600;line-height:1.5;text-align:left;
  transition:color .16s var(--ease);
}
.faq-q:hover{color:var(--brand-300);}
.faq-icon{
  flex:none;width:24px;height:24px;display:grid;place-items:center;
  color:var(--brand-300);font-size:18px;line-height:1;font-weight:400;
  transition:transform .24s var(--ease),color .16s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
.faq-a p{margin:0 0 20px;color:var(--paper-dim);font-size:15px;line-height:1.85;max-width:70ch;}

/* ---------- cta bar ---------- */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:28px 32px;border:1px solid var(--line-strong);border-radius:16px;
  background:linear-gradient(120deg,rgba(15,183,156,.10),rgba(8,17,15,0) 62%),var(--ink-800);
}
.cta-bar h3{font-size:22px;margin-bottom:8px;}
.cta-bar p{color:var(--paper-dim);font-size:14.5px;line-height:1.8;max-width:60ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding-top:56px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{color:var(--paper-dim);font-size:14px;line-height:1.8;max-width:34ch;}
.footer-col h3{font-size:13px;letter-spacing:.12em;color:var(--paper);margin-bottom:16px;font-weight:600;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--paper-dim);}
.footer-col a:hover{color:var(--paper);}
.footer-bottom{
  margin-top:44px;padding:20px 0 28px;
  border-top:1px dashed var(--line-strong);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--paper-dim);
}

/* ---------- drawer ---------- */
.drawer-overlay{
  position:fixed;inset:0;background:rgba(4,9,8,.62);z-index:80;
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.drawer-overlay.open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;z-index:90;
  background:var(--ink-800);border-left:1px solid var(--line-strong);
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.drawer-close{
  width:40px;height:40px;display:grid;place-items:center;border-radius:10px;
  background:transparent;border:1px solid var(--line);color:var(--paper);cursor:pointer;font-size:18px;
}
.drawer-close:hover{border-color:var(--brand-500);color:var(--brand-300);}
.drawer-nav{display:grid;margin-top:8px;}
.drawer-nav a{
  display:flex;align-items:center;min-height:56px;
  border-bottom:1px solid var(--line);
  font-size:15px;color:var(--paper-dim);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--brand-300);}
.drawer-foot{margin-top:auto;display:grid;gap:12px;padding-top:20px;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .search-box{width:200px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero-inner{grid-template-columns:1fr;gap:28px;padding:44px 0 48px;}
  .hero-media{aspect-ratio:16/9;}
  .spec-layout{grid-template-columns:1fr;gap:24px;}
  .grid-2{grid-template-columns:1fr;}
  .steps-row{grid-template-columns:repeat(2,1fr);gap:20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:56px 0;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:24px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .header-inner{gap:12px;min-height:64px;}
  .logo-text{font-size:15px;}
  .logo-sub{letter-spacing:.1em;}
  .header-cta{display:none;}
  .hero-inner{padding:36px 0 40px;}
  .hero-lede{font-size:15px;}
  .hero-actions .btn{flex:1 1 auto;}
  .section{padding:48px 0;}
  .steps-row{grid-template-columns:1fr;}
  .spec-row{grid-template-columns:1fr;gap:4px;padding:12px 0;}
  .spec-row dt{font-size:12px;letter-spacing:.1em;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .hero-media .media-tag{font-size:11px;padding:6px 10px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
}

/* roulang page: category3 */
:root{
  --ink-900:#08110F;
  --ink-800:#0E1A17;
  --ink-700:#16241F;
  --line:rgba(245,242,234,.12);
  --line-strong:rgba(245,242,234,.24);
  --paper:#F5F2EA;
  --paper-dim:#A9B5AF;
  --brand-500:#0FB79C;
  --brand-300:#6FE3D2;
  --brand-700:#0A8571;
  --accent:#FF6A3D;
  --ok:#35C48A;
  --warn:#E8B44A;
  --err:#FF6A3D;
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular",ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-300);text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--brand-500)}
button{font-family:inherit}
input,button,textarea,select{font:inherit;color:inherit}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(8,17,15,.85);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:20px;height:66px}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--paper);
  font-weight:700;
  font-size:17px;
  letter-spacing:-.01em;
  flex:none;
}
.logo:hover{color:var(--paper)}
.logo-mark{width:30px;height:30px;display:inline-flex;color:var(--brand-500);flex:none}
.logo-mark svg{width:100%;height:100%}
.logo-text{display:inline-flex;align-items:center;white-space:nowrap}
.logo-divider{display:inline-block;width:1px;height:13px;background:var(--line-strong);margin:0 8px;transform:translateY(1px)}
.logo-sub{font-size:12px;font-weight:500;color:var(--paper-dim);letter-spacing:.08em}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 12px;
  font-size:14px;
  font-weight:500;
  color:var(--paper-dim);
  border-radius:8px;
  transition:color .16s var(--ease),background .16s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(245,242,234,.06)}
.nav-link.active{color:var(--paper)}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:4px;
  height:2px;
  background:var(--brand-500);
  border-radius:2px;
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.command-search{position:relative;width:236px;height:40px;flex:none}
.command-search .cs-icon{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;color:var(--paper-dim);pointer-events:none;
}
.command-search input{
  width:100%;height:40px;
  padding:0 46px 0 38px;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--paper);
  font-size:13.5px;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.command-search input::placeholder{color:#6E7F79}
.command-search input:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(15,183,156,.14);
}
.cs-key{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:11px;
  padding:2px 6px;border:1px solid var(--line);border-radius:6px;
  color:var(--paper-dim);pointer-events:none;background:rgba(8,17,15,.6);
}
.nav-toggle{
  display:none;
  width:40px;height:40px;flex:none;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:transparent;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:0;
  transition:border-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand-500)}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--paper);border-radius:2px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}
.btn-primary{background:var(--accent);color:#08110F}
.btn-primary:hover{background:#F2582F;color:#08110F;transform:translateY(-1px)}
.btn-primary:active{background:#DA4A24;transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--paper)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-300)}
.btn-ghost:active{background:rgba(15,183,156,.08)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ============ badges ============ */
.badge{
  display:inline-flex;align-items:center;
  padding:4px 10px;
  border-radius:999px;
  font-size:12px;letter-spacing:.06em;
  background:rgba(15,183,156,.12);
  color:var(--brand-300);
  white-space:nowrap;
}
.badge-accent{background:rgba(255,106,61,.14);color:var(--accent)}
.badge-quiet{background:rgba(245,242,234,.07);color:var(--paper-dim)}

/* ============ hero ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg,#0B1916 0%,var(--ink-900) 100%);
  border-bottom:1px solid var(--line);
  padding:30px 0 38px;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity:.05;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;animation:fadeUp .5s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--paper-dim);margin-bottom:18px}
.breadcrumb a{color:var(--paper-dim)}
.breadcrumb a:hover{color:var(--brand-300)}
.breadcrumb span[aria-current]{color:var(--paper)}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.page-hero h1{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.24;
  letter-spacing:-.02em;
  font-weight:700;
  max-width:900px;
}
.hero-lead{
  margin-top:14px;
  max-width:760px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--paper-dim);
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 0;margin-top:18px;font-size:13.5px;color:var(--paper-dim)}
.hero-meta li{position:relative}
.hero-meta li + li{padding-left:24px}
.hero-meta li + li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:12px;background:var(--line-strong);
}

/* ============ sections ============ */
.section{padding:64px 0}
.section-tight{padding:40px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap}
.section-title{font-size:clamp(23px,2.6vw,32px);font-weight:700;letter-spacing:-.02em;line-height:1.3}
.section-desc{margin-top:10px;font-size:15px;color:var(--paper-dim);max-width:620px}
.section-note{font-size:13px;color:var(--paper-dim);white-space:nowrap}

/* ============ search panel ============ */
.search-panel{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:16px;
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.search-field{position:relative;display:flex;align-items:center}
.search-field .si{
  position:absolute;left:16px;width:18px;height:18px;
  color:var(--paper-dim);pointer-events:none;
}
.search-field input{
  width:100%;height:48px;
  padding:0 16px 0 46px;
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--paper);
  font-size:15px;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.search-field input::placeholder{color:#6E7F79}
.search-field input:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(15,183,156,.14);
}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.topic-chip{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:12px;
  color:var(--paper);
  font-size:14px;font-weight:500;
  text-align:left;
  cursor:pointer;
  transition:border-color .16s var(--ease),transform .16s var(--ease),background .16s var(--ease),color .16s var(--ease);
}
.topic-chip .ico{width:18px;height:18px;color:var(--brand-500);flex:none}
.topic-chip:hover{border-color:var(--brand-500);transform:translateY(-2px)}
.topic-chip.active{border-color:var(--brand-500);background:rgba(15,183,156,.1);color:var(--brand-300)}

/* ============ qa layout ============ */
.qa-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
.qa-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.qa-col{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.faq-item:hover{border-color:rgba(15,183,156,.45)}
.faq-item.open{border-color:var(--brand-500);background:#132121}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;
  padding:16px 18px;
  background:none;border:0;
  color:var(--paper);
  font-size:15.5px;font-weight:600;
  line-height:1.55;
  text-align:left;
  cursor:pointer;
}
.faq-icon{
  position:relative;width:20px;height:20px;flex:none;
  border:1px solid var(--line-strong);
  border-radius:6px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand-300);
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:9px;height:1.5px}
.faq-icon::after{width:1.5px;height:9px;transition:opacity .16s var(--ease),transform .24s var(--ease)}
.faq-item.open .faq-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 18px 18px;font-size:14.5px;line-height:1.85;color:var(--paper-dim)}

/* side */
.qa-side{
  position:sticky;top:88px;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px;
}
.qa-side h2{font-size:13px;letter-spacing:.08em;color:var(--paper-dim);font-weight:600;margin-bottom:6px}
.qa-side ul{display:flex;flex-direction:column}
.qa-side li + li{border-top:1px solid var(--line)}
.qa-side a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 0;
  font-size:14px;
  color:var(--paper);
}
.qa-side a:hover{color:var(--brand-300)}
.qa-side .arrow{color:var(--paper-dim);font-family:var(--mono);font-size:13px}
.qa-side .side-note{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line-strong);font-size:12.5px;line-height:1.75;color:var(--paper-dim)}

/* empty */
.qa-empty{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:56px 20px;
  text-align:center;
  border:1px dashed var(--line-strong);
  border-radius:14px;
  color:var(--paper-dim);
  font-size:15px;
}
.qa-empty svg{width:60px;height:60px;color:var(--line-strong)}
.qa-empty a{font-size:13px;text-decoration:underline;text-underline-offset:4px}

/* ============ tips table ============ */
.tips-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.tips-row{
  display:grid;
  grid-template-columns:220px minmax(0,1fr) 108px;
  gap:24px;
  align-items:start;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.tips-row dt{font-size:15px;font-weight:600;color:var(--paper);line-height:1.6}
.tips-row dd{font-size:14.5px;color:var(--paper-dim);line-height:1.8}
.tips-tag{justify-self:end}

/* ============ link rows ============ */
.link-rows{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.link-row{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  color:var(--paper);
}
.link-row:hover{color:var(--paper)}
.link-row h3{font-size:18px;font-weight:600;transition:color .16s var(--ease)}
.link-row:hover h3{color:var(--brand-300)}
.link-row p{margin-top:6px;font-size:14px;color:var(--paper-dim)}
.link-row .row-arrow{
  font-family:var(--mono);font-size:16px;color:var(--brand-500);flex:none;
  transition:transform .16s var(--ease);
}
.link-row:hover .row-arrow{transform:translateX(4px)}

/* ============ CTA ============ */
.cta-block{
  background:var(--paper);
  color:#0B1916;
  border-radius:18px;
  padding:48px 32px;
  text-align:center;
}
.cta-block h2{
  font-size:clamp(23px,2.8vw,32px);
  line-height:1.3;
  letter-spacing:-.02em;
  color:#0B1916;
  font-weight:700;
}
.cta-block p{
  margin:14px auto 24px;
  max-width:580px;
  font-size:15px;
  line-height:1.8;
  color:#43524D;
}
.cta-block .btn-primary{color:#08110F}
.cta-note{display:block;margin-top:16px;font-size:12px;color:#6C7A75}

/* ============ footer ============ */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding-top:56px}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--paper-dim);max-width:320px;line-height:1.8}
.footer-col h3{font-size:13px;letter-spacing:.08em;color:var(--paper-dim);font-weight:600;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--paper-dim)}
.footer-col a:hover{color:var(--paper)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:20px 0 28px;
  border-top:1px dashed var(--line-strong);
  font-size:12.5px;
  color:#849490;
}

/* ============ drawer ============ */
.drawer-backdrop{position:fixed;inset:0;background:rgba(4,10,9,.62);z-index:90}
.drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:88%;max-width:360px;
  background:var(--ink-800);
  border-left:1px solid var(--line);
  z-index:100;
  transform:translateX(102%);
  transition:transform .32s var(--ease);
  display:flex;flex-direction:column;
  padding:18px;
  overflow-y:auto;
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:38px;height:38px;flex:none;
  border:1px solid var(--line-strong);border-radius:10px;
  background:transparent;color:var(--paper);
  font-size:18px;line-height:1;cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.drawer-close:hover{border-color:var(--brand-500);color:var(--brand-300)}
.drawer-nav{display:flex;flex-direction:column;margin:8px 0 0}
.drawer-nav a{
  display:flex;align-items:center;
  min-height:56px;
  font-size:15px;
  color:var(--paper-dim);
  border-bottom:1px solid var(--line);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--brand-300)}
.drawer-cta{margin-top:auto;width:100%}

/* ============ responsive ============ */
@media (max-width:1023px){
  .nav-links{display:none}
  .command-search{display:none}
  .nav-toggle{display:flex}
  .qa-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .qa-side{position:static}
  .qa-columns{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tips-row{grid-template-columns:190px minmax(0,1fr) 96px;gap:16px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:52px 0}
  .section-tight{padding:32px 0}
  .nav-cta{display:none}
  .page-hero{padding:24px 0 30px}
  .hero-meta li + li{padding-left:16px}
  .search-panel{padding:16px;border-radius:14px}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .topic-chip{padding:10px 12px;font-size:13.5px;min-height:44px}
  .faq-q{font-size:15px;padding:15px 16px}
  .faq-a-inner{padding:0 16px 16px;font-size:14px}
  .tips-row{grid-template-columns:minmax(0,1fr);gap:8px;padding:16px 0}
  .tips-tag{justify-self:start}
  .link-row{align-items:flex-start;gap:16px}
  .cta-block{padding:36px 20px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{min-height:44px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}