/* roulang page: index */
:root{
  --bg-base:#0B0D10;
  --bg-elevated:#14181D;
  --bg-sunken:#07090B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#FF6B35;
  --brand-strong:#E8551F;
  --accent:#00C2A8;
  --text-1:#F3F6F8;
  --text-2:#A6B0B8;
  --text-3:#6E7880;
  --r-card:14px;
  --r-poster:12px;
  --r-btn:10px;
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,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;padding:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;line-height:1.85;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
input,textarea,select{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:rgba(255,107,53,.32);color:#fff}
.mono{font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- container & grid ---------- */
.grid-container.site-container{
  max-width:1280px;width:100%;
  margin-left:auto;margin-right:auto;
  padding-left:32px;padding-right:32px;
}
@media screen and (max-width:640px){
  .grid-container.site-container{padding-left:20px;padding-right:20px;}
}
.grid-x.grid-gap{gap:24px}
.grid-x.grid-gap > .cell{min-width:0}
@media screen and (max-width:639px){
  .grid-x.grid-gap{gap:18px}
}
@media screen and (min-width:640px){
  .grid-x.grid-gap > .cell.medium-6{width:calc(50% - 12px)}
}
@media screen and (min-width:1024px){
  .grid-x.grid-gap > .cell.large-4{width:calc(33.3333% - 16px)}
  .grid-x.grid-gap > .cell.large-5{width:calc(41.6667% - 12px)}
  .grid-x.grid-gap > .cell.large-7{width:calc(58.3333% - 12px)}
  .grid-x.grid-gap > .cell.large-8{width:calc(66.6667% - 8px)}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(20,24,29,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.header-inner{display:flex;align-items:center;gap:26px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:flex;flex-direction:column;gap:4px;width:16px}
.brand-mark i{display:block;height:6px;border-radius:2px;background:var(--brand)}
.brand-mark i:last-child{background:var(--accent);width:10px}
.brand-text{font-size:19px;font-weight:700;letter-spacing:-.01em;color:var(--text-1);white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0}
.nav-link{
  position:relative;padding:9px 14px;font-size:15px;color:var(--text-2);
  border-radius:999px;white-space:nowrap;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text-1);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  border-radius:2px;background:var(--brand);
}
.header-right{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto}
.command-search{
  display:flex;align-items:center;gap:9px;height:40px;padding:0 12px;
  min-width:250px;background:var(--bg-sunken);
  border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.command-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(0,194,168,.14)}
.command-search i{color:var(--text-3);font-size:13px}
.command-search input{flex:1;min-width:0;height:100%;border:0;background:none;outline:none;color:var(--text-1);font-size:14px}
.command-search input::placeholder{color:var(--text-3)}
.command-search kbd{
  font-family:var(--font-mono);font-size:11px;color:var(--text-3);
  border:1px solid var(--line-strong);border-radius:5px;padding:1px 6px;line-height:1.5;
}
.menu-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);border-radius:var(--r-btn);color:var(--text-1);
  transition:border-color .18s ease-out,color .18s ease-out;
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#180A03}
.btn-primary:hover{background:var(--brand-strong);border-color:var(--brand-strong);box-shadow:0 0 0 4px rgba(255,107,53,.16)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:0 0 0 4px rgba(255,107,53,.12)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  min-height:clamp(560px,50vw,700px);
  display:flex;align-items:center;
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero-veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(11,13,16,.42) 0%,rgba(11,13,16,.74) 52%,rgba(11,13,16,.97) 100%),
    linear-gradient(90deg,rgba(11,13,16,.95) 0%,rgba(11,13,16,.62) 46%,rgba(11,13,16,.22) 100%);
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;z-index:3;
  background:linear-gradient(90deg,transparent,rgba(255,107,53,.75),transparent);
}
.hero-inner{position:relative;z-index:2;width:100%;padding-top:72px;padding-bottom:72px}
.hero-copy{max-width:640px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:999px;
  background:rgba(0,194,168,.13);color:var(--accent);
  font-size:13px;letter-spacing:.04em;margin-bottom:22px;
}
.hero-eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero h1{
  font-size:clamp(34px,5vw,56px);line-height:1.15;font-weight:700;
  letter-spacing:-.02em;color:var(--text-1);
}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--text-2);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:36px}
.hero-stats li{font-size:13px;color:var(--text-2);display:flex;align-items:baseline}
.hero-stats li + li{border-left:1px solid var(--line-strong);padding-left:26px}
.hero-stats .num{
  font-family:var(--font-mono);font-size:18px;font-weight:700;
  color:var(--text-1);letter-spacing:.04em;margin-right:7px;
}
.hero-poster-wrap{display:flex;justify-content:flex-end}
.hero-poster{
  position:relative;width:100%;max-width:322px;aspect-ratio:2/3;
  border-radius:var(--r-poster);overflow:hidden;
  border:1px solid var(--line-strong);background:var(--bg-elevated);
  box-shadow:var(--shadow-card);
}
.hero-poster img{width:100%;height:100%;object-fit:cover}
.hero-poster::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,9,11,0) 42%,rgba(7,9,11,.9) 100%);
}
.poster-meta{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;
}
.poster-timecode{
  font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:.06em;
}
.poster-cta{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;
  border-radius:8px;background:var(--brand);color:#180A03;font-size:13px;font-weight:700;
  transition:background-color .18s ease-out;
}
.poster-cta:hover{background:var(--brand-strong)}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section--tight{padding-top:0}
.section--sunken{background:var(--bg-sunken);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;margin-bottom:28px;
}
.section-head h2{
  display:flex;align-items:center;gap:12px;
  font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;
}
.h-bar{flex:0 0 auto;width:3px;height:18px;border-radius:2px;background:var(--brand)}
.section-desc{margin-top:12px;font-size:15px;color:var(--text-2);max-width:60em}
.link-more{
  display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--text-2);
  white-space:nowrap;transition:color .18s ease-out;
}
.link-more:hover{color:var(--brand)}
.link-more i{font-size:12px}

/* ---------- rail ---------- */
.rail{
  display:flex;gap:20px;overflow-x:auto;padding-bottom:10px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none}
.rail-item{flex:0 0 240px;scroll-snap-align:start}
.rail-card{
  display:block;height:100%;overflow:hidden;
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.rail-card:hover{
  transform:translateY(-6px);
  border-color:rgba(255,107,53,.42);
  box-shadow:0 0 0 4px rgba(255,107,53,.12),var(--shadow-card);
}
.rail-thumb{position:relative;aspect-ratio:2/3;overflow:hidden;background:var(--bg-base)}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.rail-card:hover .rail-thumb img{transform:scale(1.05)}
.rail-badge{
  position:absolute;top:10px;left:10px;z-index:2;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(0,194,168,.18);color:var(--accent);font-size:12px;
  backdrop-filter:blur(4px);
}
.rail-body{padding:14px 14px 16px}
.rail-title{
  font-size:15px;font-weight:600;line-height:1.55;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rail-meta{
  margin-top:8px;font-family:var(--font-mono);font-size:12px;color:var(--text-3);letter-spacing:.04em;
}

/* ---------- feature + rank ---------- */
.feature-card{
  position:relative;display:flex;align-items:flex-end;
  min-height:440px;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--bg-elevated);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.feature-card:hover{border-color:rgba(255,107,53,.42);box-shadow:0 0 0 4px rgba(255,107,53,.12)}
.feature-card > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.feature-veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,9,11,.12) 0%,rgba(7,9,11,.72) 58%,rgba(7,9,11,.97) 100%);
}
.feature-body{position:relative;z-index:2;padding:28px;max-width:640px}
.feature-body h3{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.4}
.feature-body p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feature-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.play-btn{
  position:absolute;top:24px;right:24px;z-index:3;
  width:56px;height:56px;border-radius:50%;
  display:grid;place-items:center;font-size:17px;
  background:rgba(255,107,53,.94);color:#180A03;
  transition:transform .18s ease-out,background-color .18s ease-out;
}
.play-btn:hover{background:var(--brand-strong);transform:scale(1.06)}
.rank-panel{
  height:100%;padding:8px 6px;
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-card);
}
.rank-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 14px 14px;border-bottom:1px solid var(--line);
}
.rank-head span{font-size:13px;color:var(--text-3);letter-spacing:.04em;font-family:var(--font-mono)}
.rank-item{
  display:flex;align-items:center;gap:14px;height:64px;padding:0 14px;
  border-bottom:1px solid var(--line);
  transition:background-color .18s ease-out,transform .18s ease-out;
}
.rank-item:last-child{border-bottom:0}
.rank-item:hover{background:rgba(255,255,255,.045);transform:translateX(4px)}
.rank-num{flex:0 0 auto;font-family:var(--font-mono);font-size:15px;color:var(--brand);letter-spacing:.06em}
.rank-info{min-width:0;flex:1}
.rank-title{
  font-size:14px;font-weight:600;color:var(--text-1);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.rank-cat{margin-top:2px;font-size:12px;color:var(--text-3)}
.rank-dur{font-family:var(--font-mono);font-size:12px;color:var(--text-3);letter-spacing:.04em}

/* ---------- collections ---------- */
.coll-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
.coll-card{
  position:relative;display:flex;align-items:flex-end;overflow:hidden;
  min-height:220px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--bg-elevated);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.coll-card:nth-child(1),.coll-card:nth-child(2){grid-column:span 3;min-height:300px}
.coll-card:nth-child(3),.coll-card:nth-child(4),.coll-card:nth-child(5){grid-column:span 2}
.coll-card:hover{transform:translateY(-6px);border-color:rgba(255,107,53,.42);box-shadow:0 0 0 4px rgba(255,107,53,.12),var(--shadow-card)}
.coll-card > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.coll-card:hover > img{transform:scale(1.05)}
.coll-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,9,11,.1) 0%,rgba(7,9,11,.86) 100%)}
.coll-body{position:relative;z-index:2;padding:22px;width:100%}
.coll-body h3{font-size:18px;font-weight:700}
.coll-body p{margin-top:8px;font-size:13px;color:var(--text-2);line-height:1.7}
.coll-count{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;margin-top:12px;
  border-radius:999px;background:rgba(0,194,168,.14);color:var(--accent);
  font-size:12px;font-family:var(--font-mono);letter-spacing:.04em;
}
.coll-dots{
  position:absolute;top:16px;right:16px;z-index:2;
  display:grid;grid-template-columns:repeat(3,4px);gap:5px;
}
.coll-dots i{display:block;width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.28)}

/* ---------- news cards ---------- */
.news-card{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.news-card:hover{
  transform:translateY(-6px);
  border-color:rgba(255,107,53,.42);
  box-shadow:0 0 0 4px rgba(255,107,53,.12),var(--shadow-card);
}
.news-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-base)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.news-card:hover .news-thumb img{transform:scale(1.05)}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-top{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(0,194,168,.12);color:var(--accent);font-size:12px;white-space:nowrap;
}
.news-time{font-family:var(--font-mono);font-size:12px;color:var(--text-3);letter-spacing:.04em}
.news-title{
  font-size:17px;font-weight:600;line-height:1.55;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease-out;
}
.news-card:hover .news-title{color:var(--brand)}
.news-summary{
  margin-top:10px;font-size:14px;line-height:1.78;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;padding-top:16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);border-top:1px solid var(--line);
}
.news-foot .go{color:var(--brand);font-size:13px}
.empty-state{
  padding:56px 24px;text-align:center;
  background:var(--bg-elevated);border:1px dashed var(--line-strong);border-radius:var(--r-card);
}
.empty-state i{font-size:26px;color:var(--text-3)}
.empty-state p{margin-top:14px;font-size:15px;color:var(--text-2)}
.empty-state .btn{margin-top:20px}

/* ---------- numbers strip ---------- */
.stats-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:30px 32px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--bg-elevated);
}
.stat-item{position:relative}
.stat-item + .stat-item{border-left:1px solid var(--line);padding-left:24px}
.stat-num{font-family:var(--font-mono);font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--text-1);letter-spacing:.04em}
.stat-num em{font-style:normal;font-size:15px;color:var(--brand);margin-left:4px;letter-spacing:.02em}
.stat-label{margin-top:6px;font-size:13px;color:var(--text-3)}

/* ---------- cta ---------- */
.cta-card{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:center;
  padding:44px;border:1px solid var(--line);border-radius:18px;
  background:var(--bg-elevated);
}
.cta-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand),rgba(255,107,53,0));
}
.cta-copy h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.35;letter-spacing:-.01em}
.cta-copy p{margin-top:12px;font-size:15px;color:var(--text-2);max-width:38em}
.subscribe{display:flex;gap:12px;margin-top:24px;max-width:520px}
.subscribe input{
  flex:1;min-width:0;height:48px;padding:0 16px;border-radius:var(--r-btn);
  background:var(--bg-sunken);border:1px solid var(--line);color:var(--text-1);
  outline:none;font-size:15px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.subscribe input::placeholder{color:var(--text-3)}
.subscribe input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(0,194,168,.14)}
.form-tip{margin-top:10px;font-size:13px;color:var(--text-3)}
.cta-deco{display:grid;grid-template-columns:repeat(8,4px);gap:12px;justify-content:end;align-content:center}
.cta-deco i{display:block;width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.14)}
.cta-deco i:nth-child(3n){background:rgba(255,107,53,.58)}
.cta-deco i:nth-child(5n){background:rgba(0,194,168,.5)}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line);padding:0 20px;transition:background-color .18s ease-out}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item.is-open{background:var(--bg-elevated)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;text-align:left;font-size:16px;font-weight:600;color:var(--text-2);
  transition:color .18s ease-out;
}
.faq-q:hover{color:var(--text-1)}
.faq-item.is-open .faq-q{color:var(--text-1)}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;font-size:12px;
  border:1px solid var(--line-strong);color:var(--text-2);
}
.faq-item.is-open .faq-icon{border-color:var(--brand);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease-out}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a-inner{padding:0 0 20px;font-size:15px;line-height:1.9;color:var(--text-2);max-width:60em}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-sunken);border-top:1px solid var(--line);padding-top:64px;color:var(--text-2);font-size:14px;line-height:1.9}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{max-width:30em;color:var(--text-2)}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border-radius:var(--r-btn);border:1px solid var(--line-strong);
  display:grid;place-items:center;color:var(--text-2);
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.footer-social a:hover{color:var(--brand);border-color:var(--brand);background:rgba(255,107,53,.08)}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:16px;letter-spacing:.02em}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--text-2);transition:color .18s ease-out}
.footer-col a:hover{color:var(--brand);text-decoration:underline}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2)}
.footer-contact i{color:var(--accent);font-size:13px;margin-top:6px}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:90;
  background:rgba(7,9,11,.72);
  opacity:0;visibility:hidden;
  transition:opacity .25s ease-out,visibility .25s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:100;
  width:min(320px,86vw);padding:22px 20px;
  background:var(--bg-elevated);border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .25s ease-out;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{
  width:44px;height:44px;border-radius:var(--r-btn);
  display:grid;place-items:center;border:1px solid var(--line-strong);color:var(--text-1);
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-link{
  height:44px;display:flex;align-items:center;padding:0 14px;
  border-radius:var(--r-btn);color:var(--text-2);font-size:15px;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.drawer-link:hover{background:rgba(255,255,255,.05);color:var(--text-1)}
.drawer-link.is-active{background:rgba(255,107,53,.14);color:var(--text-1);font-weight:600}
.drawer .command-search{margin-top:18px;min-width:0;width:100%}
.drawer .btn{margin-top:14px;width:100%}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .section{padding:64px 0}
  .main-nav{display:none}
  .command-search{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{gap:16px}
  .hero-poster-wrap{justify-content:flex-start;margin-top:8px}
  .hero-poster{max-width:260px}
  .cta-card{grid-template-columns:1fr;padding:34px}
  .cta-deco{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stats-strip{grid-template-columns:repeat(2,1fr);gap:18px;padding:24px}
  .stat-item + .stat-item{border-left:0;padding-left:0}
  .coll-grid{grid-template-columns:repeat(4,1fr)}
  .coll-card:nth-child(n){grid-column:span 2;min-height:240px}
}
@media screen and (max-width:639px){
  .section{padding:48px 0}
  .hero{min-height:auto}
  .hero-inner{padding-top:52px;padding-bottom:52px}
  .hero-poster-wrap{display:none}
  .hero-stats{gap:16px;margin-top:28px}
  .hero-stats li + li{border-left:0;padding-left:0}
  .hero-actions .btn{flex:1 1 auto}
  .rail-item{flex:0 0 180px}
  .section-head{align-items:flex-start;flex-direction:column;gap:10px}
  .feature-card{min-height:320px}
  .feature-body{padding:20px}
  .play-btn{width:46px;height:46px;top:16px;right:16px;font-size:15px}
  .coll-grid{grid-template-columns:1fr}
  .coll-card:nth-child(n){grid-column:span 1;min-height:220px}
  .subscribe{flex-direction:column}
  .subscribe .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .stats-strip{grid-template-columns:1fr}
  .cta-card{padding:26px 20px}
  .faq-item{padding:0 14px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .rail-card:hover,.news-card:hover,.coll-card:hover,.rank-item:hover{transform:none}
  .rail-card:hover .rail-thumb img,.news-card:hover .news-thumb img,.coll-card:hover > img{transform:none}
}

/* roulang page: category1 */
:root{
  --bg-base:#0B0D10;
  --bg-elevated:#14181D;
  --bg-sunken:#07090B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#FF6B35;
  --brand-strong:#E8551F;
  --accent:#00C2A8;
  --text-1:#F3F6F8;
  --text-2:#A6B0B8;
  --text-3:#6E7880;
  --radius-card:14px;
  --radius-poster:12px;
  --radius-btn:10px;
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --pad-section:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--accent);text-decoration:none;transition:color 180ms ease-out;}
a:hover{color:var(--brand);}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

/* ---------- 容器 ---------- */
.site-container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.grid-container.site-container{padding-left:32px;padding-right:32px;max-width:1280px;}
.mono{font-family:var(--font-mono);letter-spacing:.04em;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(20,24,29,.92);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text-1);
  font-weight:700;
  font-size:18px;
  letter-spacing:-.01em;
}
.brand:hover{color:var(--text-1);}
.brand-mark{
  display:inline-flex;
  gap:3px;
}
.brand-mark i{
  width:8px;height:18px;
  border-radius:3px;
  display:block;
}
.brand-mark i:first-child{background:var(--brand);}
.brand-mark i:last-child{background:var(--accent);}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  min-width:0;
}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:15px;
  color:var(--text-2);
  border-radius:999px;
  white-space:nowrap;
  transition:color 180ms ease-out,background 180ms ease-out;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.nav-link.is-active{
  color:var(--text-1);
  background:rgba(255,107,53,.12);
  box-shadow:inset 0 -2px 0 0 var(--brand);
}
.nav-tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 10px 0 12px;
  background:var(--bg-sunken);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.command-search:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(0,194,168,.18);
}
.command-search i{color:var(--text-3);font-size:13px;}
.command-search input{
  width:150px;
  border:0;
  background:transparent;
  color:var(--text-1);
  font-size:14px;
  font-family:inherit;
  outline:none;
}
.command-search input::placeholder{color:var(--text-3);}
.kbd{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--text-3);
  border:1px solid var(--line-strong);
  border-radius:5px;
  padding:1px 5px;
  line-height:1.6;
}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  background:transparent;
  color:var(--text-2);
  transition:color 180ms ease-out,border-color 180ms ease-out,background 180ms ease-out;
}
.icon-btn:hover{color:var(--text-1);border-color:var(--line-strong);background:rgba(255,255,255,.04);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:background 180ms ease-out,border-color 180ms ease-out,color 180ms ease-out,transform 180ms ease-out;
}
.btn-primary{
  background:var(--brand);
  color:#120803;
}
.btn-primary:hover{background:var(--brand-strong);color:#120803;transform:translateY(-1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-sm{height:36px;padding:0 14px;font-size:14px;}
.btn-block{width:100%;}
.nav-cta{height:40px;padding:0 18px;font-size:14px;}

/* ---------- 移动抽屉 ---------- */
.nav-toggle{display:none;}
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(320px,86vw);
  height:100%;
  background:var(--bg-elevated);
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform 220ms ease-out;
  z-index:90;
  padding:22px 20px;
  display:flex;
  flex-direction:column;
  gap:10px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.6);
  opacity:0;
  visibility:hidden;
  transition:opacity 220ms ease-out,visibility 220ms ease-out;
  z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.drawer .nav-link{
  height:44px;
  display:flex;
  align-items:center;
  border-radius:8px;
  padding:0 12px;
  background:rgba(255,255,255,.03);
}
.drawer .command-search{margin-top:auto;}
.drawer .command-search input{width:100%;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  padding:22px 0 0;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--line-strong);}
.breadcrumb .current{color:var(--text-2);}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  margin-top:18px;
  border-radius:18px;
  overflow:hidden;
  border:1px solid var(--line);
  background-color:var(--bg-elevated);
  background-image:linear-gradient(90deg,rgba(7,9,11,.94) 0%,rgba(7,9,11,.78) 46%,rgba(7,9,11,.42) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  aspect-ratio:16/5;
  display:flex;
  align-items:center;
}
.cat-hero-inner{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:32px;
  align-items:center;
  width:100%;
  padding:40px 44px;
}
.cat-hero h1{
  font-size:clamp(30px,3.6vw,46px);
  line-height:1.18;
  letter-spacing:-.02em;
  font-weight:700;
}
.cat-hero h1 em{
  font-style:normal;
  color:var(--brand);
}
.cat-hero .hero-desc{
  margin-top:14px;
  color:var(--text-2);
  font-size:15px;
  max-width:52ch;
}
.stat-tags{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:22px;
}
.stat-tag{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:8px 14px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(11,13,16,.6);
  font-size:13px;
  color:var(--text-2);
}
.stat-tag b{
  font-family:var(--font-mono);
  font-size:15px;
  color:var(--accent);
  letter-spacing:.04em;
}
.cat-hero-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap;}
.cat-hero-figure{
  aspect-ratio:3/4;
  max-height:300px;
  border-radius:var(--radius-poster);
  overflow:hidden;
  border:1px solid var(--line-strong);
  background:var(--bg-elevated);
  box-shadow:var(--shadow-card);
  position:relative;
}
.cat-hero-figure img{width:100%;height:100%;object-fit:cover;}
.cat-hero-figure .figure-bar{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:10px 12px;
  background:linear-gradient(180deg,rgba(7,9,11,0) 0%,rgba(7,9,11,.9) 100%);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:12px;
  color:var(--text-2);
}

/* ---------- 板块通用 ---------- */
.section{padding-top:var(--pad-section);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:26px;
}
.section-title{
  position:relative;
  padding-left:14px;
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.3;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;top:6px;
  width:3px;height:18px;
  border-radius:2px;
  background:var(--brand);
}
.section-sub{
  margin-top:8px;
  padding-left:14px;
  color:var(--text-2);
  font-size:14px;
}
.link-more{
  font-size:14px;
  color:var(--text-2);
  display:inline-flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
}
.link-more:hover{color:var(--brand);}

/* ---------- 横滑片库 ---------- */
.rail + .rail{margin-top:46px;}
.rail-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:16px;
}
.rail-head h3{font-size:20px;font-weight:600;}
.rail-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:6px;
  scrollbar-width:none;
}
.rail-track::-webkit-scrollbar{display:none;}
.poster-card{
  flex:0 0 240px;
  scroll-snap-align:start;
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform 180ms ease-out,border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.poster-card:hover{
  transform:translateY(-6px);
  border-color:rgba(255,107,53,.4);
  box-shadow:0 0 0 4px rgba(255,107,53,.12),var(--shadow-card);
}
.poster-thumb{
  position:relative;
  aspect-ratio:2/3;
  background:var(--bg-base);
  overflow:hidden;
}
.poster-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 180ms ease-out;}
.poster-card:hover .poster-thumb img{transform:scale(1.05);}
.poster-badge{
  position:absolute;
  top:10px;left:10px;
  height:24px;
  padding:0 10px;
  display:inline-flex;
  align-items:center;
  border-radius:999px;
  font-size:12px;
  color:#04201c;
  background:var(--accent);
  font-weight:600;
}
.poster-time{
  position:absolute;
  right:10px;bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--text-1);
  background:rgba(7,9,11,.82);
  border:1px solid var(--line);
  border-radius:6px;
  padding:2px 7px;
}
.poster-body{padding:14px 14px 16px;}
.poster-body h4{
  font-size:15px;
  font-weight:600;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.poster-meta{
  margin-top:8px;
  font-size:12px;
  color:var(--text-3);
  display:flex;
  align-items:center;
  gap:8px;
}
.poster-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line-strong);}

/* ---------- 四列卡片网格 ---------- */
.grid-4{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.cat-card{
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform 180ms ease-out,border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.cat-card:hover{
  transform:translateY(-6px);
  border-color:rgba(255,107,53,.4);
  box-shadow:0 0 0 4px rgba(255,107,53,.12),var(--shadow-card);
}
.cat-card-thumb{
  aspect-ratio:16/10;
  background:var(--bg-base);
  overflow:hidden;
}
.cat-card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 180ms ease-out;}
.cat-card:hover .cat-card-thumb img{transform:scale(1.05);}
.cat-card-body{
  padding:16px 16px 18px;
  display:flex;
  flex-direction:column;
  gap:8px;
  flex:1 1 auto;
}
.cat-card-body h3{font-size:17px;font-weight:600;}
.cat-card-body p{
  font-size:13px;
  color:var(--text-2);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-foot{
  margin-top:auto;
  padding-top:10px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:12px;
  color:var(--text-3);
}
.card-foot .count{font-family:var(--font-mono);color:var(--accent);}

/* ---------- 观看说明三步 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.step-card{
  position:relative;
  padding:26px 24px;
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
}
.step-card .step-no{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
}
.step-card h3{margin-top:12px;font-size:18px;font-weight:600;}
.step-card p{margin-top:10px;font-size:14px;color:var(--text-2);}
.film-dots{
  display:flex;
  gap:4px;
  margin-top:18px;
}
.film-dots span{
  width:4px;height:4px;
  border-radius:50%;
  background:var(--line-strong);
}
.film-dots span:nth-child(-n+3){background:var(--brand);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  border-top:1px solid var(--line);
  background:transparent;
  transition:background 180ms ease-out;
}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-item.is-open{background:var(--bg-elevated);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 18px;
  background:transparent;
  border:0;
  text-align:left;
  color:var(--text-2);
  font-size:16px;
  font-weight:600;
  line-height:1.6;
}
.faq-item.is-open .faq-q{color:var(--text-1);}
.faq-q i{color:var(--brand);font-size:14px;flex:0 0 auto;}
.faq-a{
  display:none;
  padding:0 18px 22px;
  color:var(--text-2);
  font-size:14.5px;
  max-width:70ch;
}
.faq-item.is-open .faq-a{display:block;}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:var(--pad-section);
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:18px;
  padding:40px 44px;
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:32px;
  align-items:center;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3;}
.cta-band p{margin-top:12px;color:var(--text-2);font-size:14.5px;max-width:52ch;}
.subscribe-row{
  display:flex;
  gap:12px;
  margin-top:24px;
  flex-wrap:wrap;
}
.subscribe-row input{
  flex:1 1 240px;
  height:44px;
  padding:0 14px;
  background:var(--bg-sunken);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-btn);
  color:var(--text-1);
  font-size:14px;
  font-family:inherit;
  outline:none;
  transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.subscribe-row input::placeholder{color:var(--text-3);}
.subscribe-row input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.18);}
.form-note{margin-top:10px;font-size:13px;color:var(--text-3);}
.form-note.is-error{color:var(--accent);}
.cta-decor{
  height:180px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background-color:var(--bg-sunken);
  background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:14px 14px;
  position:relative;
  overflow:hidden;
}
.cta-decor::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:3px;
  background:linear-gradient(90deg,var(--brand) 0%,var(--accent) 100%);
}

/* ---------- 页尾入口 ---------- */
.end-links{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  justify-content:center;
  padding-top:56px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--pad-section);
  background:var(--bg-sunken);
  border-top:1px solid var(--line);
  padding:56px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,2.5fr) minmax(0,2.5fr) minmax(0,3fr);
  gap:32px;
}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{color:var(--text-2);font-size:14px;line-height:1.9;max-width:38ch;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  width:38px;height:38px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line-strong);
  border-radius:10px;
  color:var(--text-2);
}
.footer-social a:hover{color:var(--brand);border-color:var(--brand);}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:14px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{color:var(--text-2);font-size:14px;}
.footer-col ul li a:hover{color:var(--brand);text-decoration:underline;}
.footer-contact li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  color:var(--text-2);
  font-size:14px;
  line-height:1.8;
}
.footer-contact i{color:var(--accent);margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  color:var(--text-3);
  font-size:13px;
  flex-wrap:wrap;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--pad-section:64px;}
  .main-nav,.nav-tools .command-search,.nav-tools .icon-btn{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{gap:12px;}
  .nav-tools{margin-left:auto;}
  .cat-hero{aspect-ratio:auto;}
  .cat-hero-inner{
    grid-template-columns:1fr;
    padding:32px 28px;
    gap:24px;
  }
  .cat-hero-figure{max-height:260px;aspect-ratio:16/10;}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:32px 28px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:767px){
  .site-container,.grid-container.site-container{padding-left:20px;padding-right:20px;}
  :root{--pad-section:48px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .poster-card{flex:0 0 180px;}
  .rail-track{gap:14px;}
  .grid-4{grid-template-columns:1fr;}
  .cat-hero-inner{padding:26px 20px;}
  .cat-hero-actions .btn{width:100%;}
  .subscribe-row .btn{width:100%;}
  .cta-band{padding:26px 20px;}
  .cta-decor{height:120px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .poster-card:hover,.cat-card:hover,.btn-primary:hover{transform:none;}
  .poster-card:hover .poster-thumb img,.cat-card:hover .cat-card-thumb img{transform:none;}
}

/* roulang page: article */
:root{
  --bg-base:#0B0D10;
  --bg-elevated:#14181D;
  --bg-sunken:#07090B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#FF6B35;
  --brand-strong:#E8551F;
  --brand-soft:rgba(255,107,53,.12);
  --accent:#00C2A8;
  --accent-soft:rgba(0,194,168,.12);
  --text-1:#F3F6F8;
  --text-2:#A6B0B8;
  --text-3:#6E7880;
  --radius-card:14px;
  --radius-poster:12px;
  --radius-btn:10px;
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","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(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:clamp(34px,5vw,56px);line-height:1.15;font-weight:700;letter-spacing:-.02em}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
h3{font-size:20px;line-height:1.4;font-weight:600}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand);color:#fff}
.mono{font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- container ---------- */
.site-container,.grid-container.site-container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.section{padding:88px 0;border-top:1px solid var(--line)}
.section-tight{padding:64px 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
}
.section-title{position:relative;padding-left:16px}
.section-title::before{
  content:"";
  position:absolute;
  left:0;top:.28em;
  width:3px;height:18px;
  background:var(--brand);
  border-radius:2px;
}
.section-desc{color:var(--text-2);font-size:15px;margin-top:8px;max-width:640px}
.text-link{
  color:var(--text-2);
  font-size:14px;
  border-bottom:1px solid var(--accent);
  padding-bottom:2px;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.text-link:hover{color:var(--brand);border-color:var(--brand)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#131313;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-strong);border-color:var(--brand-strong);color:#131313;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  background:var(--accent-soft);
  color:var(--accent);
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  white-space:nowrap;
}
.badge-brand{background:var(--brand-soft);color:var(--brand)}
.tag{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  color:var(--text-2);
  font-size:13px;
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.tag:hover{color:var(--brand);border-color:rgba(255,107,53,.4);background:var(--brand-soft)}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(20,24,29,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{display:inline-flex;gap:3px}
.brand-mark i{width:8px;height:8px;border-radius:2px;display:block}
.brand-mark i:first-child{background:var(--brand)}
.brand-mark i:last-child{background:var(--accent)}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.01em;color:var(--text-1)}
.main-nav{display:flex;align-items:center;gap:6px;flex:1 1 auto;min-width:0}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 12px;
  border-radius:999px;
  color:var(--text-2);
  font-size:14.5px;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  width:230px;
  padding:0 10px 0 12px;
  border-radius:var(--radius-btn);
  background:var(--bg-sunken);
  border:1px solid var(--line);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.command-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.16)}
.command-search i{color:var(--text-3);font-size:13px}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  background:transparent;
  border:0;
  outline:none;
  font-size:14px;
  color:var(--text-1);
}
.command-search input::placeholder{color:var(--text-3)}
.kbd{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--text-3);
  border:1px solid var(--line-strong);
  border-radius:6px;
  padding:1px 6px;
}
.icon-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  border-radius:var(--radius-btn);
  border:1px solid var(--line);
  color:var(--text-2);
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.icon-btn:hover{color:var(--brand);border-color:rgba(255,107,53,.4);background:var(--brand-soft)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--radius-btn);
  border:1px solid var(--line);
  padding:0 11px;
  flex-direction:column;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text-1)}
.nav-toggle span:nth-child(2){width:70%}
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(86vw,340px);
  height:100%;
  background:var(--bg-elevated);
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .22s ease-out;
  z-index:80;
  padding:22px 20px 28px;
  display:flex;
  flex-direction:column;
  gap:18px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  min-height:44px;
  display:flex;
  align-items:center;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  font-size:15px;
}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--brand)}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(0,0,0,.6);
  opacity:0;pointer-events:none;
  transition:opacity .22s ease-out;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:22px 0 0;font-size:13px;color:var(--text-3)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--text-3)}
.breadcrumb a{color:var(--text-3);transition:color .18s ease-out}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .current{color:var(--text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article head ---------- */
.article-wrap{padding-top:30px}
.article-head{max-width:860px}
.article-head h1{
  font-size:clamp(28px,3.6vw,40px);
  line-height:1.28;
  margin:18px 0 16px;
  letter-spacing:-.01em;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--text-3);
}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.article-meta span+span::before{content:"";width:1px;height:12px;background:var(--line-strong);display:inline-block;margin-right:2px}
.article-cover{
  margin:32px 0 0;
  position:relative;
  border-radius:var(--radius-poster);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-elevated);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s ease-out}
.article-cover:hover img{transform:scale(1.03)}
.article-cover figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:26px 22px 14px;
  font-size:13px;
  color:var(--text-2);
  background:linear-gradient(180deg,rgba(11,13,16,0),rgba(11,13,16,.86));
}

/* ---------- layout with side panel ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:56px;
  align-items:start;
  margin-top:40px;
}
.article-body{
  max-width:780px;
  font-size:16.5px;
  line-height:1.9;
  color:#DDE4E9;
}
.article-body p{margin:0 0 20px}
.article-body h2{
  font-size:24px;
  margin:44px 0 16px;
  padding-left:14px;
  position:relative;
  color:var(--text-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;width:3px;height:18px;background:var(--brand);border-radius:2px;
}
.article-body h3{font-size:19px;margin:32px 0 12px;color:var(--text-1)}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand)}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:0}
.article-body ul li,.article-body ol li{position:relative;padding-left:22px;margin-bottom:10px;line-height:1.8}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.75em;width:6px;height:6px;border-radius:2px;background:var(--accent);
}
.article-body ol{counter-reset:item}
.article-body ol li{counter-increment:item;padding-left:30px}
.article-body ol li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);font-size:13px;color:var(--accent);letter-spacing:.04em;
}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  border-left:3px solid var(--brand);
  background:var(--bg-elevated);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-poster);margin:26px 0;width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--bg-elevated)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--bg-elevated);color:var(--text-1)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-empty{
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);
  background:var(--bg-elevated);
  padding:48px 26px;
  text-align:center;
}
.article-empty i{font-size:26px;color:var(--text-3)}
.article-empty h2{font-size:22px;margin:14px 0 10px}
.article-empty p{color:var(--text-2);margin-bottom:22px}

/* ---------- side panel ---------- */
.side-panel{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.panel{
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-card);
}
.panel h3{font-size:14px;letter-spacing:.08em;color:var(--text-3);font-weight:600;text-transform:uppercase;margin-bottom:14px}
.panel-nav{display:flex;flex-direction:column;gap:2px}
.panel-nav a{
  display:flex;align-items:center;gap:10px;
  min-height:40px;
  padding:0 10px;
  border-radius:8px;
  font-size:14px;
  color:var(--text-2);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.panel-nav a:hover{color:var(--brand);background:rgba(255,255,255,.04)}
.panel-nav a i{color:var(--text-3);font-size:12px}
.fact-list{display:flex;flex-direction:column;gap:12px}
.fact-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--text-2);border-bottom:1px solid var(--line);padding-bottom:10px}
.fact-list li:last-child{border-bottom:0;padding-bottom:0}
.fact-list b{font-family:var(--font-mono);font-weight:500;letter-spacing:.04em;color:var(--text-1)}

/* ---------- tags / share ---------- */
.article-foot{margin-top:44px;max-width:780px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.share-row{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line);
}
.share-row p{font-size:13px;color:var(--text-3)}
.share-actions{display:flex;gap:10px}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.card:hover{transform:translateY(-6px);border-color:rgba(255,107,53,.4);box-shadow:0 10px 30px rgba(0,0,0,.45),0 0 0 4px rgba(255,107,53,.12)}
.card-media{position:relative;overflow:hidden;background:var(--bg-elevated);aspect-ratio:16/9}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease-out}
.card:hover .card-media img{transform:scale(1.05)}
.card-flag{position:absolute;top:12px;left:12px}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .18s ease-out}
.card:hover .card-body h3{color:var(--brand)}
.card-body p{
  font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:6px}
.card-time{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--text-3)}
.card-arrow{color:var(--text-3);transition:color .18s ease-out,transform .18s ease-out}
.card:hover .card-arrow{color:var(--brand);transform:translateX(4px)}

/* ---------- back nav ---------- */
.back-nav{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:36px}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-sunken);border-top:1px solid var(--line);margin-top:0;padding:64px 0 26px}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:40px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--text-2);max-width:34ch}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:var(--radius-btn);
  border:1px solid var(--line);color:var(--text-2);
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.footer-social a:hover{color:var(--brand);border-color:rgba(255,107,53,.4);background:var(--brand-soft)}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-contact span{font-size:14px;line-height:1.9;color:var(--text-2);transition:color .18s ease-out}
.footer-col a:hover{color:var(--brand);text-decoration:underline}
.footer-contact li{display:flex;gap:10px;align-items:flex-start}
.footer-contact i{color:var(--text-3);margin-top:6px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .main-nav{gap:2px}
  .nav-link{padding:0 9px;font-size:14px}
  .command-search{width:180px}
}
@media (max-width:1024px){
  .site-container,.grid-container.site-container{padding-left:24px;padding-right:24px}
  .section{padding:64px 0}
  .main-nav,.command-search,.header-actions .icon-btn{display:none}
  .nav-toggle{display:flex}
  .header-inner{gap:14px;justify-content:space-between}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .side-panel{position:static;flex-direction:row;flex-wrap:wrap}
  .panel{flex:1 1 260px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .section{padding:48px 0;border-top:1px solid var(--line)}
  .article-head h1{font-size:clamp(24px,6vw,30px)}
  .article-body{font-size:16px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:520px){
  .site-container,.grid-container.site-container{padding-left:20px;padding-right:20px}
  .header-actions .btn-primary{display:none}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .side-panel{flex-direction:column}
  .breadcrumb .current{max-width:34ch}
  .share-row{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .back-nav .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .card:hover{transform:none}
  .card:hover .card-media img{transform:none}
  .btn:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bg-base:#0B0D10;
  --bg-elevated:#14181D;
  --bg-sunken:#07090B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#FF6B35;
  --brand-strong:#E8551F;
  --accent:#00C2A8;
  --text-1:#F3F6F8;
  --text-2:#A6B0B8;
  --text-3:#6E7880;
  --radius-card:14px;
  --radius-poster:12px;
  --radius-btn:10px;
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --glow:0 0 0 4px rgba(255,107,53,.12);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --sec-pad:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;background:var(--bg-elevated)}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{border:0;background:none;cursor:pointer;font-family:inherit}
input{font-family:inherit}
.grid-container.site-container{max-width:1280px;padding-left:32px;padding-right:32px;margin-left:auto;margin-right:auto}
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.section{padding:var(--sec-pad) 0;position:relative}
.section--sunken{background:var(--bg-sunken)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-title{position:relative;padding-left:16px;font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.sec-title::before{content:"";position:absolute;left:0;top:.28em;width:3px;height:18px;border-radius:2px;background:var(--brand)}
.sec-desc{color:var(--text-2);font-size:15px;max-width:620px;margin-top:10px;padding-left:16px}
.sec-link{color:var(--accent);font-size:14px;border-bottom:1px solid rgba(0,194,168,.4);padding-bottom:2px;transition:color .18s ease-out,border-color .18s ease-out}
.sec-link:hover{color:var(--brand);border-color:var(--brand)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:rgba(0,194,168,.12);color:var(--accent);font-size:12px;letter-spacing:.02em;white-space:nowrap}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(20,24,29,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px) saturate(120%);
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.01em;flex:0 0 auto}
.brand-mark{display:inline-flex;align-items:flex-end;gap:3px;height:18px}
.brand-mark i{display:block;width:6px;height:18px;border-radius:2px;background:var(--brand)}
.brand-mark i:last-child{height:11px;background:var(--accent)}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{position:relative;display:inline-flex;align-items:center;height:38px;padding:0 14px;border-radius:999px;font-size:15px;color:var(--text-2);transition:color .18s ease-out,background-color .18s ease-out}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text-1);background:rgba(255,107,53,.12)}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.command-search{display:flex;align-items:center;gap:8px;width:min(272px,30vw);height:40px;padding:0 10px;background:var(--bg-base);border:1px solid var(--line);border-radius:var(--radius-btn);transition:border-color .18s ease-out,box-shadow .18s ease-out}
.command-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.16)}
.command-search i{color:var(--text-3);font-size:13px}
.command-search input{flex:1;min-width:0;height:38px;border:0;background:transparent;outline:none;font-size:14px;color:var(--text-1)}
.command-search input::placeholder{color:var(--text-3)}
.kbd{font-family:var(--font-mono);font-size:11px;color:var(--text-3);border:1px solid var(--line-strong);border-radius:6px;padding:1px 6px;letter-spacing:.04em}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-btn);border:1px solid var(--line);color:var(--text-2);transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out}
.icon-btn:hover{color:var(--brand);border-color:rgba(255,107,53,.4);background:rgba(255,107,53,.06)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out}
.btn-primary{background:var(--brand);color:#150E09}
.btn-primary:hover{background:var(--brand-strong);color:#fff;box-shadow:var(--glow)}
.btn-ghost{border-color:var(--line-strong);color:var(--text-1);background:transparent}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--glow)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border-radius:var(--radius-btn);border:1px solid var(--line-strong);color:var(--text-1);font-size:16px}
.nav-toggle:hover{color:var(--brand);border-color:rgba(255,107,53,.5)}
.drawer-mask{position:fixed;inset:0;background:rgba(0,0,0,.62);opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out;z-index:70}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{position:fixed;top:0;right:0;height:100%;width:min(324px,88vw);background:var(--bg-elevated);border-left:1px solid var(--line);z-index:80;transform:translateX(102%);transition:transform .24s ease-out;display:flex;flex-direction:column;padding:20px}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{display:flex;align-items:center;height:44px;padding:0 12px;border-radius:10px;color:var(--text-2);font-size:15px}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--text-1);background:rgba(255,107,53,.1)}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:12px}

/* ============ Breadcrumb ============ */
.crumbs{padding:22px 0 0}
.crumbs ol{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);flex-wrap:wrap}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:var(--text-3)}
.crumbs .current{color:var(--text-2)}

/* ============ 4 + 8 分栏 ============ */
.split-wrap{padding:26px 0 var(--sec-pad)}
.split-grid{align-items:flex-start}
.split-aside{position:sticky;top:96px}
.sticky-card{
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-card);
}
.sticky-card h1{
  font-size:clamp(28px,3.1vw,40px);
  line-height:1.18;
  font-weight:700;
  letter-spacing:-.02em;
  margin-bottom:14px;
}
.sticky-card h1 em{font-style:normal;color:var(--brand)}
.sticky-lead{color:var(--text-2);font-size:15px;margin-bottom:22px}
.points{display:flex;flex-direction:column;gap:14px;margin-bottom:24px}
.point{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);line-height:1.75}
.point::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.point b{color:var(--text-1);font-weight:600}
.aside-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.aside-cover{border-radius:var(--radius-poster);overflow:hidden;border:1px solid var(--line)}
.aside-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .18s ease-out}
.sticky-card:hover .aside-cover img{transform:scale(1.04)}
.aside-note{font-size:13px;color:var(--text-3);margin-top:12px;font-family:var(--font-mono);letter-spacing:.04em}

.split-main .main-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.split-main h2{font-size:clamp(22px,2.2vw,28px);font-weight:700;line-height:1.35}
.split-main .main-head p{font-size:14px;color:var(--text-3);font-family:var(--font-mono);letter-spacing:.04em}
.index-list{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--bg-elevated);overflow:hidden}
.index-row{
  display:flex;align-items:center;gap:18px;
  min-height:72px;padding:12px 22px;
  border-bottom:1px solid var(--line);
  transition:transform .18s ease-out,background-color .18s ease-out;
}
.index-row:last-child{border-bottom:0}
.index-row:hover{background:rgba(255,255,255,.045);transform:translateX(4px)}
.index-row:hover .index-title{color:var(--brand)}
.index-num{font-family:var(--font-mono);font-size:15px;color:var(--text-3);letter-spacing:.06em;flex:0 0 34px}
.index-body{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1 1 auto}
.index-title{font-size:16px;font-weight:600;transition:color .18s ease-out}
.index-desc{font-size:13.5px;color:var(--text-2);line-height:1.6;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.index-meta{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.index-meta .mono{font-size:13px;color:var(--text-3)}
.index-row .fa-arrow-right-long{color:var(--text-3);font-size:13px;transition:color .18s ease-out,transform .18s ease-out}
.index-row:hover .fa-arrow-right-long{color:var(--brand);transform:translateX(3px)}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step-item{position:relative;background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;transition:border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out}
.step-item:hover{border-color:rgba(255,107,53,.4);transform:translateY(-6px);box-shadow:var(--shadow-card),var(--glow)}
.step-num{font-family:var(--font-mono);font-size:13px;color:var(--brand);letter-spacing:.08em;display:block;margin-bottom:12px}
.step-item h3{font-size:19px;font-weight:600;margin-bottom:8px}
.step-item p{font-size:14.5px;color:var(--text-2)}

/* ============ 场景卡 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-card{background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out}
.scene-card:hover{border-color:rgba(255,107,53,.4);transform:translateY(-6px);box-shadow:var(--shadow-card),var(--glow)}
.scene-media{position:relative;overflow:hidden}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .18s ease-out}
.scene-card:hover .scene-media img{transform:scale(1.05)}
.scene-media .tag{position:absolute;left:12px;top:12px}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:rgba(11,13,16,.72);border:1px solid var(--line-strong);color:var(--text-1);font-size:12px;backdrop-filter:blur(4px)}
.scene-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto}
.scene-body h3{font-size:17px;font-weight:600;line-height:1.5}
.scene-body p{font-size:14px;color:var(--text-2);flex:1 1 auto}
.scene-body .mono{font-size:12.5px;color:var(--text-3)}

/* ============ 数据概览 ============ */
.stats-band{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--bg-elevated);
}
.stats-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(11,13,16,.94),rgba(11,13,16,.78)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.stats-inner{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{padding:34px 26px;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:0}
.stat-num{font-family:var(--font-mono);font-size:clamp(26px,3vw,38px);font-weight:700;letter-spacing:.04em;color:var(--text-1);display:block;line-height:1.1}
.stat-num span{color:var(--brand)}
.stat-label{display:block;margin-top:10px;font-size:14px;color:var(--text-2)}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius-card);margin-bottom:12px;overflow:hidden;transition:border-color .18s ease-out}
.faq-item[open]{border-color:rgba(255,107,53,.34)}
.faq-q{list-style:none;cursor:pointer;position:relative;padding:20px 56px 20px 20px;font-size:16px;font-weight:600;color:var(--text-2);transition:color .18s ease-out,background-color .18s ease-out}
.faq-q::-webkit-details-marker{display:none}
.faq-q::marker{content:""}
.faq-item[open] .faq-q,.faq-q:hover{color:var(--text-1);background:rgba(255,255,255,.03)}
.faq-q::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-family:var(--font-mono);font-size:20px;color:var(--brand);line-height:1}
.faq-item[open] .faq-q::after{content:"−"}
.faq-a{padding:0 20px 22px;font-size:15px;color:var(--text-2);border-top:1px solid var(--line);margin-top:-1px;padding-top:18px}

/* ============ CTA ============ */
.cta-card{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  display:grid;
  grid-template-columns:1.35fr .65fr;
  background:var(--bg-elevated);
  box-shadow:var(--shadow-card);
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(11,13,16,.95) 42%,rgba(11,13,16,.7)),url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
}
.cta-copy{position:relative;padding:44px}
.cta-copy h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;line-height:1.3;margin-bottom:12px}
.cta-copy p{color:var(--text-2);font-size:15px;max-width:520px;margin-bottom:26px}
.subscribe{display:flex;gap:12px;flex-wrap:wrap;max-width:520px}
.subscribe input{
  flex:1 1 240px;height:46px;padding:0 16px;border-radius:var(--radius-btn);
  background:rgba(11,13,16,.9);border:1px solid var(--line-strong);color:var(--text-1);font-size:15px;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.subscribe input::placeholder{color:var(--text-3)}
.subscribe input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.16)}
.subscribe.is-error input{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.12)}
.form-hint{margin-top:12px;font-size:13px;color:var(--text-3)}
.form-hint.is-error{color:var(--accent)}
.form-hint.is-ok{color:var(--accent)}
.cta-deco{position:relative;min-height:220px;display:flex;align-items:center;justify-content:center;padding:32px}
.dot-grid{display:grid;grid-template-columns:repeat(6,8px);gap:14px}
.dot-grid i{width:4px;height:4px;border-radius:50%;background:rgba(255,107,53,.55);display:block}
.dot-grid i:nth-child(3n){background:rgba(0,194,168,.55)}
.dot-grid i:nth-child(5n){background:rgba(255,255,255,.22)}

/* ============ Footer ============ */
.site-footer{background:var(--bg-sunken);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:36px;padding-bottom:44px}
.footer-brand p{color:var(--text-2);font-size:14px;margin-top:16px;max-width:320px;line-height:1.9}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);color:var(--text-2);transition:color .18s ease-out,border-color .18s ease-out}
.footer-social a:hover{color:var(--brand);border-color:rgba(255,107,53,.45)}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-1)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--text-2);font-size:14px;transition:color .18s ease-out}
.footer-col a:hover{color:var(--brand);text-decoration:underline}
.footer-contact li{display:flex;gap:10px;color:var(--text-2);font-size:14px;line-height:1.8}
.footer-contact i{color:var(--accent);margin-top:6px;font-size:13px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding:20px 0 28px;font-size:13px;color:var(--text-3);font-family:var(--font-mono);letter-spacing:.04em}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  :root{--sec-pad:64px}
  .main-nav{display:none}
  .command-search{display:none}
  .nav-toggle{display:inline-flex}
  .split-aside{position:static;margin-bottom:28px}
  .steps{grid-template-columns:1fr 1fr}
  .scene-grid{grid-template-columns:1fr 1fr}
  .stats-inner{grid-template-columns:1fr 1fr}
  .stat-item:nth-child(2n){border-right:0}
  .stat-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .cta-card{grid-template-columns:1fr}
  .cta-deco{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1024px){
  .nav-drawer,.drawer-mask{display:none}
}
@media (max-width:767px){
  :root{--sec-pad:48px}
  .grid-container.site-container{padding-left:20px;padding-right:20px}
  .header-inner{height:64px;gap:12px}
  .brand{font-size:16px}
  .btn-sm{padding:0 14px}
  .steps{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .index-row{flex-wrap:wrap;gap:10px;padding:16px 18px}
  .index-num{flex:0 0 auto}
  .index-body{flex:1 1 100%;order:3}
  .index-desc{white-space:normal}
  .index-meta{margin-left:auto}
  .sticky-card{padding:22px}
  .cta-copy{padding:28px}
  .stats-inner{grid-template-columns:1fr}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);padding:24px 22px}
  .stat-item:last-child{border-bottom:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .subscribe input,.subscribe .btn{flex:1 1 100%;width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .index-row:hover{transform:none}
  .step-item:hover,.scene-card:hover{transform:none}
  .scene-card:hover .scene-media img,.sticky-card:hover .aside-cover img{transform:none}
}

/* roulang page: category3 */
:root{
  --bg-base:#0B0D10;
  --bg-elevated:#14181D;
  --bg-sunken:#07090B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#FF6B35;
  --brand-strong:#E8551F;
  --accent:#00C2A8;
  --text-1:#F3F6F8;
  --text-2:#A6B0B8;
  --text-3:#6E7880;
  --radius-card:14px;
  --radius-poster:12px;
  --radius-btn:10px;
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --glow:0 0 0 4px rgba(255,107,53,.12);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.02em;color:var(--text-1)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
button,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.grid-container.site-container{max-width:1280px;padding-left:32px;padding-right:32px;margin:0 auto;width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(20,24,29,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.01em;color:var(--text-1);flex:0 0 auto}
.brand-mark{display:inline-flex;align-items:flex-end;gap:3px;height:18px}
.brand-mark i{display:block;width:8px;height:18px;border-radius:2px;background:var(--brand)}
.brand-mark i+i{height:11px;background:var(--accent)}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;
  padding:0 12px;font-size:15px;color:var(--text-2);border-radius:8px;
}
.nav-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:40px;width:250px;padding:0 10px;
  background:var(--bg-base);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.command-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.15)}
.command-search i{color:var(--text-3);font-size:13px}
.command-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;
  font-size:14px;color:var(--text-1);
}
.command-search input::placeholder{color:var(--text-3)}
.command-search .kbd{
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;
  color:var(--text-3);border:1px solid var(--line);border-radius:6px;padding:1px 6px;
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:var(--bg-base);color:var(--text-2);
  transition:color .18s ease-out,border-color .18s ease-out,background .18s ease-out;
}
.icon-btn:hover{color:var(--text-1);border-color:var(--line-strong);background:var(--bg-elevated)}
.nav-toggle{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  border:1px solid transparent;white-space:nowrap;
  transition:background .18s ease-out,border-color .18s ease-out,color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.btn--primary{background:var(--brand);color:#14100D}
.btn--primary:hover{background:var(--brand-strong);color:#fff;box-shadow:var(--glow)}
.btn--ghost{background:transparent;color:var(--text-1);border-color:var(--line-strong)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn--sm{height:38px;padding:0 16px;font-size:14px}
.btn--block{width:100%}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,4,6,.6);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);z-index:80;
  background:var(--bg-elevated);border-left:1px solid var(--line);
  padding:22px 20px 28px;display:flex;flex-direction:column;gap:6px;
  transform:translateX(102%);transition:transform .22s ease-out;overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-link{
  display:flex;align-items:center;height:44px;padding:0 12px;border-radius:8px;
  font-size:16px;color:var(--text-2);border:1px solid transparent;
}
.drawer-link:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
.drawer-link.is-active{color:var(--text-1);border-color:var(--line);background:rgba(255,107,53,.08)}
.drawer-foot{margin-top:auto;padding-top:20px;display:flex;flex-direction:column;gap:14px}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:22px 0 0}
.breadcrumb{font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--text-3);opacity:.6}
.breadcrumb .current{color:var(--text-2)}

/* ---------- Hero ---------- */
.cat-hero-wrap{padding:22px 0 0}
.cat-hero{
  position:relative;border-radius:16px;overflow:hidden;
  border:1px solid var(--line);
  background:#0E1216 url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  box-shadow:var(--shadow-card);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,9,11,.94) 0%,rgba(7,9,11,.82) 46%,rgba(7,9,11,.52) 100%);
}
.cat-hero__inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;padding:52px 48px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;color:var(--accent);
  background:rgba(0,194,168,.12);border:1px solid rgba(0,194,168,.28);
}
.cat-hero h1{font-size:clamp(32px,4.4vw,52px);line-height:1.15;letter-spacing:-.02em;margin:18px 0 14px}
.cat-hero h1 em{font-style:normal;color:var(--brand)}
.cat-hero__lead{color:var(--text-2);font-size:17px;max-width:34em}
.hero-meta{display:flex;flex-wrap:wrap;gap:26px;margin:26px 0 30px}
.hero-meta span{font-size:13px;color:var(--text-3);letter-spacing:.04em}
.hero-meta b{font-family:var(--mono);font-size:20px;font-weight:600;color:var(--text-1);margin-right:6px;letter-spacing:.04em}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.cat-hero__media{position:relative}
.cat-hero__media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius-poster);
  border:1px solid var(--line-strong);background:var(--bg-elevated);
}
.cat-hero__media figcaption{
  margin-top:12px;font-size:13px;color:var(--text-3);font-family:var(--mono);letter-spacing:.04em;
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:38px}
.section-title{position:relative;padding-left:16px;font-size:clamp(24px,2.6vw,34px)}
.section-title::before{
  content:"";position:absolute;left:0;top:.22em;width:3px;height:18px;border-radius:2px;background:var(--brand);
}
.section-sub{margin-top:12px;color:var(--text-2);max-width:52em;padding-left:16px}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);white-space:nowrap}
.link-more i{font-size:12px;transition:transform .18s ease-out}
.link-more:hover{color:var(--brand)}
.link-more:hover i{transform:translateX(4px)}

/* ---------- 图片比例 ---------- */
.ratio{position:relative;overflow:hidden;background:var(--bg-elevated);border-radius:var(--radius-poster)}
.ratio-16x9{aspect-ratio:16/9}
.ratio-4x3{aspect-ratio:4/3}
.ratio-3x4{aspect-ratio:3/4}
.ratio-16x11{aspect-ratio:16/11}
.ratio img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}

/* ---------- 标签 ---------- */
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;color:var(--accent);background:rgba(0,194,168,.12);
  border:1px solid rgba(0,194,168,.22);
}
.tag--mono{font-family:var(--mono);letter-spacing:.06em;color:var(--text-2);background:rgba(255,255,255,.05);border-color:var(--line)}
.tag--brand{color:var(--brand);background:rgba(255,107,53,.12);border-color:rgba(255,107,53,.28)}

/* ---------- 首条大卡 ---------- */
.feature-card{
  display:grid;grid-template-columns:8fr 4fr;gap:0;
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:var(--bg-elevated);box-shadow:var(--shadow-card);
  transition:border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
  margin-bottom:44px;
}
.feature-card:hover{border-color:rgba(255,107,53,.4);transform:translateY(-4px);box-shadow:var(--shadow-card),var(--glow)}
.feature-card:hover img{transform:scale(1.04)}
.feature-card__body{padding:34px;display:flex;flex-direction:column;gap:14px;justify-content:center}
.feature-card__body h3{font-size:22px;line-height:1.4}
.feature-card__body p{color:var(--text-2);font-size:15px}
.card-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--brand);margin-top:4px}
.card-link i{font-size:12px;transition:transform .18s ease-out}
.story-card:hover .card-link i{transform:translateX(4px)}

/* ---------- 错落瀑布 ---------- */
.fall-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;align-items:start}
.fall-col{display:flex;flex-direction:column;gap:28px}
.fall-col--offset{margin-top:64px}
.story-card{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:var(--bg-elevated);box-shadow:var(--shadow-card);
  transition:border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.story-card:hover{border-color:rgba(255,107,53,.4);transform:translateY(-6px);box-shadow:var(--shadow-card),var(--glow)}
.story-card:hover img{transform:scale(1.05)}
.story-card__body{padding:24px;display:flex;flex-direction:column;gap:12px}
.story-card__body h3{font-size:19px;line-height:1.45}
.story-card:hover h3{color:var(--brand)}
.story-card__body p{color:var(--text-2);font-size:14.5px}

/* ---------- 数据条 ---------- */
.stat-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
}
.stat{background:var(--bg-elevated);padding:30px 26px}
.stat__num{display:block;font-family:var(--mono);font-size:34px;font-weight:600;letter-spacing:.04em;color:var(--text-1)}
.stat__num em{font-style:normal;font-size:16px;color:var(--text-3);margin-left:4px}
.stat__label{display:block;margin-top:8px;font-size:13px;color:var(--text-3);letter-spacing:.04em}

/* ---------- 记录维度 ---------- */
.pillar-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.pillar{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--bg-elevated);
  padding:28px 24px;display:flex;flex-direction:column;gap:12px;
  transition:border-color .18s ease-out,transform .18s ease-out;
}
.pillar:hover{border-color:rgba(0,194,168,.4);transform:translateY(-4px)}
.pillar__idx{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--brand)}
.pillar h3{font-size:18px}
.pillar p{color:var(--text-2);font-size:14px}
.pillar__dots{display:flex;gap:4px;margin-top:auto;padding-top:8px}
.pillar__dots i{width:4px;height:4px;border-radius:50%;background:var(--line-strong);display:block}
.pillar__dots i:first-child{background:var(--brand)}

/* ---------- 引用块 ---------- */
.quote-block{
  border-left:3px solid var(--brand);background:var(--bg-elevated);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:32px 34px;
}
.quote-block p{font-size:18px;line-height:1.9;color:var(--text-1)}
.quote-block cite{display:block;margin-top:16px;font-style:normal;font-size:13px;color:var(--text-3);font-family:var(--mono);letter-spacing:.06em}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line);background:transparent;transition:background .18s ease-out}
.faq-item:first-of-type{border-top:1px solid var(--line)}
.faq-item[open]{background:var(--bg-elevated)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 18px;font-size:16.5px;font-weight:600;color:var(--text-2);transition:color .18s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-family:var(--mono);font-size:20px;line-height:1;color:var(--text-3);flex:0 0 auto;
}
.faq-item[open] summary{color:var(--text-1)}
.faq-item[open] summary::after{content:"−";color:var(--brand)}
.faq-item summary:hover{color:var(--text-1)}
.faq-body{padding:0 18px 22px;color:var(--text-2);font-size:15px}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--line);
  background:#0E1216 url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  box-shadow:var(--shadow-card);
}
.cta-panel::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(95deg,rgba(7,9,11,.95) 0%,rgba(7,9,11,.86) 52%,rgba(7,9,11,.5) 100%);
}
.cta-inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;padding:52px 48px}
.cta-inner h2{font-size:clamp(24px,2.8vw,34px);margin-bottom:14px}
.cta-inner p{color:var(--text-2);max-width:36em}
.cta-form{display:flex;gap:12px;margin-top:26px;max-width:460px}
.cta-form input{
  flex:1;min-width:0;height:44px;padding:0 14px;border-radius:var(--radius-btn);
  background:rgba(11,13,16,.75);border:1px solid var(--line-strong);color:var(--text-1);outline:none;
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.cta-form input::placeholder{color:var(--text-3)}
.cta-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.16)}
.form-hint{margin-top:12px;font-size:13px;color:var(--text-3)}
.cta-deco{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;align-content:center}
.cta-deco i{display:block;height:4px;border-radius:999px;background:rgba(255,255,255,.08)}
.cta-deco i:nth-child(3n){background:rgba(255,107,53,.55)}
.cta-deco i:nth-child(4n){background:rgba(0,194,168,.45)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-sunken);border-top:1px solid var(--line);padding-top:64px;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--text-2);font-size:14px;max-width:30em}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:var(--radius-btn);border:1px solid var(--line);color:var(--text-2);
}
.footer-social a:hover{color:var(--brand);border-color:rgba(255,107,53,.45)}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--text-1);margin-bottom:16px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.footer-contact i{color:var(--text-3);margin-top:5px;font-size:13px}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--line);padding:22px 0 26px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);letter-spacing:.02em;
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1279px){
  .grid-container.site-container{padding-left:28px;padding-right:28px}
  .command-search{width:210px}
}
@media screen and (max-width:1023px){
  .main-nav{display:none}
  .command-search{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:64px 0}
  .section--tight{padding:48px 0}
  .cat-hero__inner{grid-template-columns:1fr;gap:30px;padding:40px 32px}
  .cat-hero__media img{aspect-ratio:16/9}
  .feature-card{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .pillar-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:1fr;gap:28px;padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media screen and (max-width:767px){
  .fall-grid{grid-template-columns:1fr}
  .fall-col--offset{margin-top:0}
  .feature-card__body{padding:26px 22px}
}
@media screen and (max-width:639px){
  .grid-container.site-container{padding-left:20px;padding-right:20px}
  .section{padding:48px 0}
  .section--tight{padding:40px 0}
  .header-inner{height:62px;gap:12px}
  .brand{font-size:16px}
  .cat-hero-wrap{padding-top:16px}
  .cat-hero__inner{padding:28px 22px;gap:24px}
  .cat-hero h1{font-size:clamp(28px,8vw,36px)}
  .hero-meta{gap:16px;margin:20px 0 24px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px}
  .stat-grid{grid-template-columns:1fr}
  .pillar-grid{grid-template-columns:1fr}
  .quote-block{padding:24px 20px}
  .faq-item summary{padding:18px 14px;font-size:15.5px}
  .faq-body{padding:0 14px 20px}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .cta-deco{grid-template-columns:repeat(4,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .site-footer{padding-top:48px;margin-top:64px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .story-card:hover,.feature-card:hover,.pillar:hover{transform:none}
  .story-card:hover img,.feature-card:hover img{transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --bg-base:#0B0D10;
  --bg-elevated:#14181D;
  --bg-sunken:#07090B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#FF6B35;
  --brand-strong:#E8551F;
  --accent:#00C2A8;
  --text-1:#F3F6F8;
  --text-2:#A6B0B8;
  --text-3:#6E7880;
  --radius-card:14px;
  --radius-poster:12px;
  --radius-btn:10px;
  --shadow-card:0 10px 30px rgba(0,0,0,.45);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --container:1280px;
  --gutter:32px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--accent);text-decoration:none;transition:color 180ms ease-out,border-color 180ms ease-out,background-color 180ms ease-out}
a:hover{color:var(--brand)}
h1,h2,h3,h4,h5,h6{
  font-family:var(--sans);
  color:var(--text-1);
  margin:0;
  font-weight:700;
  line-height:1.25;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(34px,5vw,56px);line-height:1.15;letter-spacing:-0.02em;font-weight:700}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700}
h3{font-size:20px;font-weight:600}
p{margin:0 0 16px;color:var(--text-2)}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:var(--sans)}
input,textarea,select{font-family:var(--sans)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:4px;
}
::selection{background:rgba(255,107,53,.35);color:#fff}

/* ============ 布局容器 ============ */
.grid-container{
  max-width:var(--container);
  padding-left:var(--gutter);
  padding-right:var(--gutter);
  margin-left:auto;
  margin-right:auto;
  width:100%;
}
.grid-x{margin-left:-16px;margin-right:-16px}
.grid-x>.cell{padding-left:16px;padding-right:16px}
.grid-x.gap-y-24{row-gap:24px}
.grid-x.gap-y-32{row-gap:32px}
.grid-x.gap-y-40{row-gap:40px}

.section{padding:88px 0;position:relative}
.section-tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{position:relative;padding-left:16px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:2px;background:var(--brand);
}
.section-head .section-desc{max-width:520px;font-size:15px;color:var(--text-2);margin:8px 0 0}
.section-head .head-link{
  font-size:14px;font-weight:600;color:var(--accent);white-space:nowrap;
  display:inline-flex;align-items:center;gap:8px;min-height:44px;
}
.section-head .head-link:hover{color:var(--brand)}

/* ============ 顶栏导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(20,24,29,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text-1);font-weight:700;font-size:18px;
  letter-spacing:-0.01em;flex:0 0 auto;
}
.brand:hover{color:var(--text-1)}
.brand-mark{display:inline-flex;gap:4px;align-items:center}
.brand-mark i{display:block;width:7px;height:18px;border-radius:2px;background:var(--brand)}
.brand-mark i:last-child{background:var(--accent)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:68px;
  padding:0 14px;font-size:15px;font-weight:500;color:var(--text-2);
}
.nav-link:hover{color:var(--text-1)}
.nav-link.is-active{color:var(--text-1)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  border-radius:2px;background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;min-width:250px;
  padding:0 10px 0 12px;border:1px solid var(--line-strong);border-radius:var(--radius-btn);
  background:rgba(255,255,255,.03);transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.command-search i{color:var(--text-3);font-size:13px}
.command-search input{
  flex:1;height:100%;border:0;background:transparent;outline:0;
  color:var(--text-1);font-size:14px;
}
.command-search input::placeholder{color:var(--text-3)}
.command-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,194,168,.14)}
.kbd{
  font-family:var(--mono);font-size:11px;color:var(--text-3);
  border:1px solid var(--line-strong);border-radius:6px;padding:2px 6px;letter-spacing:.04em;
}
.quick-icons{display:flex;align-items:center;gap:4px}
.quick-icons a{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-btn);color:var(--text-2);font-size:15px;
}
.quick-icons a:hover{color:var(--brand);background:rgba(255,255,255,.05)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line-strong);background:transparent;color:var(--text-1);
  font-size:16px;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background-color 180ms ease-out,border-color 180ms ease-out,color 180ms ease-out,transform 180ms ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#1A0F09;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-strong);border-color:var(--brand-strong);color:#fff}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.62);z-index:80;
  opacity:0;visibility:hidden;transition:opacity 200ms ease-out,visibility 200ms ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:90;
  background:var(--bg-elevated);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 240ms ease-out;
  padding:22px 20px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.nav-drawer.is-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:var(--radius-btn);border:1px solid var(--line-strong);
  background:transparent;color:var(--text-1);cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-link{
  display:flex;align-items:center;min-height:44px;padding:0 12px;border-radius:var(--radius-btn);
  color:var(--text-2);font-size:15px;font-weight:500;
}
.drawer-link:hover{background:rgba(255,255,255,.05);color:var(--text-1)}
.drawer-link.is-active{color:var(--text-1);background:rgba(255,107,53,.12)}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;margin-top:auto;
  padding:0 12px;border:1px solid var(--line-strong);border-radius:var(--radius-btn);
  background:rgba(255,255,255,.03);
}
.drawer-search input{flex:1;height:100%;border:0;background:transparent;outline:0;color:var(--text-1);font-size:14px}
.drawer-search i{color:var(--text-3);font-size:13px}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);
  padding:20px 0 0;flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--text-2)}

/* ============ Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:40px 0 72px;border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.30;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,13,16,.72) 0%,rgba(11,13,16,.88) 45%,var(--bg-base) 96%);
}
.page-hero .grid-container{position:relative;z-index:2}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;
  border-radius:999px;background:rgba(0,194,168,.12);color:var(--accent);
  font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:20px;
}
.hero-copy h1{margin:0 0 18px}
.hero-copy h1 em{font-style:normal;color:var(--brand)}
.hero-lead{
  font-size:16px;line-height:1.85;color:var(--text-2);max-width:560px;margin:0 0 28px;
}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center}
.hero-stat{display:flex;align-items:baseline;gap:8px}
.hero-stat .num{
  font-family:var(--mono);font-size:20px;font-weight:700;color:var(--text-1);letter-spacing:.04em;
}
.hero-stat .label{font-size:13px;color:var(--text-3)}
.hero-stat + .hero-stat{padding-left:28px;border-left:1px solid var(--line)}
.hero-visual{
  position:relative;border-radius:var(--radius-poster);overflow:hidden;
  border:1px solid var(--line-strong);background:var(--bg-elevated);
  box-shadow:var(--shadow-card);aspect-ratio:16/10;
}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual .tag-float{
  position:absolute;left:14px;bottom:14px;
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;
  background:rgba(7,9,11,.82);border:1px solid var(--line-strong);
  font-family:var(--mono);font-size:12px;color:var(--text-1);letter-spacing:.04em;
}

/* ============ 时间轴 ============ */
.timeline-wrap{position:relative}
.timeline{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 56px;
}
.tl-col{position:relative;padding-left:34px}
.tl-col::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,rgba(255,107,53,.55) 0%,rgba(255,255,255,.08) 22%,rgba(255,255,255,.08) 100%);
}
.tl-item{position:relative;padding-bottom:38px}
.tl-item:last-child{padding-bottom:8px}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:5px;width:11px;height:11px;border-radius:50%;
  background:var(--bg-base);border:2px solid var(--brand);
  transition:box-shadow 180ms ease-out;
}
.tl-item:hover::before{box-shadow:0 0 0 5px rgba(255,107,53,.16)}
.tl-meta{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.tl-code{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.08em;
}
.tl-time{
  font-family:var(--mono);font-size:12px;color:var(--text-3);letter-spacing:.04em;
  display:inline-flex;align-items:center;gap:6px;
}
.tl-time::before{content:"";width:1px;height:11px;background:var(--line-strong)}
.tl-item h3{margin:0 0 8px;transition:color 180ms ease-out}
.tl-item:hover h3{color:var(--brand)}
.tl-item p{font-size:15px;line-height:1.85;color:var(--text-2);margin:0 0 12px}
.tl-link{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--accent);
  min-height:32px;
}
.tl-link i{font-size:11px;transition:transform 180ms ease-out}
.tl-link:hover{color:var(--brand)}
.tl-link:hover i{transform:translateX(4px)}

/* ============ 快速索引卡片 ============ */
.index-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:transform 180ms ease-out,border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.index-card:hover{
  transform:translateY(-6px);border-color:rgba(255,107,53,.4);
  box-shadow:0 0 0 4px rgba(255,107,53,.12),var(--shadow-card);
}
.index-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-sunken)}
.index-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease-out}
.index-card:hover .thumb img{transform:scale(1.05)}
.index-card .thumb .badge{
  position:absolute;top:12px;left:12px;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(0,194,168,.12);color:var(--accent);font-size:12px;font-weight:600;
  letter-spacing:.02em;
}
.badge-brand{background:rgba(255,107,53,.14);color:var(--brand)}
.index-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.index-card .body h3{font-size:17px}
.index-card .body p{font-size:14px;line-height:1.8;color:var(--text-2);margin:0}
.index-card .body .more{
  margin-top:auto;font-size:13px;font-weight:600;color:var(--accent);
  display:inline-flex;align-items:center;gap:8px;
}
.index-card:hover .body .more{color:var(--brand)}

/* ============ 提示条 ============ */
.tip-strip{
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 28px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
}
.tip-item{display:flex;gap:14px;align-items:flex-start}
.tip-item .ico{
  flex:0 0 auto;width:38px;height:38px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,107,53,.12);color:var(--brand);font-size:15px;
}
.tip-item h4{font-size:15px;margin:0 0 4px}
.tip-item p{font-size:13.5px;line-height:1.75;color:var(--text-2);margin:0}

/* ============ FAQ ============ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 44px 20px 0;position:relative;
  font-size:17px;font-weight:600;color:var(--text-2);
  transition:color 180ms ease-out,background-color 180ms ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:20px;font-weight:400;color:var(--text-3);line-height:1;
}
.faq-item[open] summary{color:var(--text-1);background:var(--bg-elevated)}
.faq-item[open] summary::after{content:"−";color:var(--brand)}
.faq-item summary:hover{color:var(--text-1)}
.faq-item .faq-body{padding:0 44px 22px 0;background:var(--bg-elevated)}
.faq-item .faq-body p{font-size:15px;line-height:1.85;color:var(--text-2);padding-top:2px;margin:0}

/* ============ CTA ============ */
.cta-card{
  position:relative;overflow:hidden;
  background:var(--bg-elevated);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:48px;
}
.cta-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:center;position:relative;z-index:2}
.cta-card h2{margin:0 0 14px}
.cta-card p{font-size:15px;color:var(--text-2);max-width:520px;margin:0 0 26px}
.subscribe-row{display:flex;gap:12px;align-items:stretch;max-width:520px}
.subscribe-row input{
  flex:1;height:48px;padding:0 16px;border-radius:var(--radius-btn);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  color:var(--text-1);font-size:15px;outline:0;
  transition:border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.subscribe-row input::placeholder{color:var(--text-3)}
.subscribe-row input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(0,194,168,.14)}
.form-note{font-size:13px;color:var(--text-3);margin:12px 0 0}
.form-note.is-error{color:var(--brand)}
.cta-deco{
  position:relative;height:180px;border-radius:var(--radius-poster);
  border:1px solid var(--line);background:var(--bg-sunken);overflow:hidden;
}
.cta-deco .grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:28px 28px;
}
.cta-deco .dot-row{
  position:absolute;left:22px;right:22px;bottom:22px;
  display:flex;justify-content:space-between;
}
.cta-deco .dot-row span{
  width:4px;height:4px;border-radius:50%;background:var(--brand);opacity:.85;
}
.cta-deco .deco-caption{
  position:absolute;top:20px;left:22px;
  font-family:var(--mono);font-size:12px;color:var(--text-3);letter-spacing:.08em;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-sunken);border-top:1px solid var(--line);
  padding:64px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--text-2);max-width:320px;margin:0 0 20px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:40px;height:40px;border-radius:var(--radius-btn);border:1px solid var(--line-strong);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);font-size:15px;
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand)}
.footer-col h4{font-size:15px;margin:0 0 18px;color:var(--text-1)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--brand);text-decoration:underline}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.75}
.footer-contact i{color:var(--text-3);margin-top:6px;font-size:13px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1120px){
  .main-nav{display:none}
  .command-search{min-width:200px}
  .nav-toggle{display:inline-flex}
}
@media (max-width:1023px){
  :root{--gutter:24px}
  .section{padding:64px 0}
  .timeline{grid-template-columns:1fr;gap:0}
  .tl-col + .tl-col{margin-top:28px}
  .timeline{gap:0}
  .tl-col{padding-left:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-card{padding:36px}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .tip-strip{grid-template-columns:1fr;gap:20px}
}
@media (max-width:900px){
  .command-search{display:none}
  .quick-icons{display:none}
}
@media (max-width:640px){
  :root{--gutter:20px}
  .grid-x{margin-left:-10px;margin-right:-10px}
  .grid-x>.cell{padding-left:10px;padding-right:10px}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .page-hero{padding:28px 0 48px}
  .hero-stat + .hero-stat{padding-left:20px;border-left:1px solid var(--line)}
  .hero-visual{aspect-ratio:4/3;margin-top:8px}
  .timeline{grid-template-columns:1fr}
  .tl-item{padding-bottom:30px}
  .subscribe-row{flex-direction:column}
  .subscribe-row .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-card{padding:28px 22px}
  .tip-strip{padding:22px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-deco{height:130px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .index-card:hover{transform:none}
  .index-card:hover .thumb img{transform:none}
  .tl-link:hover i{transform:none}
}