/* roulang page: index */
:root{
  --brand:#3B1E5A;
  --brand-deep:#241035;
  --brand-soft:#7B4FA8;
  --accent:#FF6B5A;
  --accent-hover:#F04E3C;
  --mint:#2FD1B0;
  --bg:#F6F3EF;
  --surface:#FFFFFF;
  --surface-alt:#F1EAF8;
  --line:#E9E2F0;
  --text:#1A1420;
  --text-sub:#6B6172;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow-s:0 4px 14px rgba(59,30,90,.06);
  --shadow-m:0 10px 28px rgba(59,30,90,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-soft);text-decoration:none;text-underline-offset:2px;transition:color .25s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4{margin:0;line-height:1.3}
h1{font-size:40px;font-weight:700}
h2{font-size:30px;font-weight:700}
h3{font-size:20px;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(255,107,90,.55);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-s);border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .25s ease,color .25s ease,box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,107,90,.28)}
.btn--primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(240,78,60,.34)}
.btn--primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(240,78,60,.24)}
.btn--ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn--ghost:hover{background:var(--surface-alt);color:var(--brand);transform:translateY(-1px)}
.btn--ghost-light{background:transparent;border-color:rgba(255,255,255,.7);color:#fff}
.btn--ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px)}
.btn--sm{padding:9px 18px;font-size:14px}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;background:var(--surface-alt);
  color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.2px;
}
.tag{
  display:inline-block;padding:4px 10px;border-radius:999px;
  background:var(--surface-alt);color:var(--brand);font-size:12px;font-weight:600;
}
.tag--mint{background:rgba(47,209,176,.14);color:#177a66}
.tag--accent{background:rgba(255,107,90,.14);color:#b93a2a}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.25);
  box-shadow:0 8px 26px rgba(36,16,53,.18);
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:76px;
  display:flex;align-items:center;gap:24px;transition:height .3s ease;
}
.logo{display:flex;align-items:center;gap:10px;color:#fff;flex:none}
.logo:hover{color:#fff}
.logo-main{font-size:17px;font-weight:700;letter-spacing:.3px}
.logo-line{width:1px;height:16px;background:rgba(255,255,255,.5)}
.logo-sub{font-size:12px;font-weight:500;opacity:.86}
.nav-menu{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-menu a{
  position:relative;color:rgba(255,255,255,.92);font-size:15px;font-weight:500;
  padding:6px 0;white-space:nowrap;transition:color .25s ease;
}
.nav-menu a:hover{color:#fff}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-menu a:hover::after,.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;flex:none}
.nav-search{
  width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.4);
  background:transparent;color:#fff;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:.25s ease;
}
.nav-search:hover{background:rgba(255,255,255,.16)}
.nav-burger{
  display:none;width:42px;height:42px;border:0;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;gap:5px;padding:0 8px;
}
.nav-burger span{display:block;height:2px;border-radius:2px;background:#fff;transition:.3s ease}
body.drawer-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.drawer-open .nav-burger span:nth-child(2){opacity:0}
body.drawer-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.site-header.scrolled{
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-s);
}
.site-header.scrolled .nav-inner{height:64px}
.site-header.scrolled .logo,.site-header.scrolled .logo:hover{color:var(--brand)}
.site-header.scrolled .logo-line{background:var(--line)}
.site-header.scrolled .nav-menu a{color:var(--text)}
.site-header.scrolled .nav-menu a:hover{color:var(--brand-soft)}
.site-header.scrolled .nav-search{border-color:var(--line);color:var(--brand)}
.site-header.scrolled .nav-search:hover{background:var(--surface-alt)}
.site-header.scrolled .nav-burger span{background:var(--brand)}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(26,20,32,.55);opacity:0;visibility:hidden;
  transition:.3s ease;z-index:95;
}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:100;
  background:var(--brand-deep);padding:88px 26px 32px;
  transform:translateX(102%);transition:transform .32s ease;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.nav-drawer a{
  display:block;color:#fff;font-size:17px;font-weight:600;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.nav-drawer a:hover{color:var(--accent)}
.nav-drawer .btn{margin-top:22px;border-bottom:0;justify-content:center}
body.drawer-open .nav-drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:radial-gradient(circle at 24% 16%, #5a3585 0%, #3B1E5A 44%, #241035 100%);
  padding:150px 0 100px;
}
.hero__bg{
  position:absolute;inset:0;pointer-events:none;
  background:url('/assets/images/eee9df88dffc5f9d.webp') center/cover no-repeat;
  opacity:.2;mix-blend-mode:luminosity;
}
.hero__bg::after{
  content:"";position:absolute;inset:0;opacity:.4;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px, transparent 1px);
  background-size:3px 3px;
}
.hero__inner{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  font-size:13px;font-weight:600;letter-spacing:.4px;
}
.hero h1{
  margin:22px 0 0;font-size:42px;line-height:1.28;letter-spacing:.4px;
  text-shadow:0 8px 30px rgba(0,0,0,.28);
}
.hero__lead{
  margin-top:18px;font-size:18px;font-weight:600;color:#FFD9D2;
}
.hero__text{margin-top:14px;color:rgba(255,255,255,.82);font-size:15.5px;line-height:1.85;max-width:580px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero__trust{display:flex;flex-wrap:wrap;gap:22px;margin-top:30px;font-size:14px;color:rgba(255,255,255,.78)}
.hero__trust li{display:flex;align-items:center;gap:8px}
.hero__trust li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(47,209,176,.18)}
.hero__device{position:relative;min-height:440px}
.device{
  position:absolute;border-radius:26px;overflow:hidden;background:#1a1226;
  border:1px solid rgba(255,255,255,.2);
  box-shadow:0 28px 60px rgba(0,0,0,.45);
}
.device img{width:100%;height:100%;object-fit:cover}
.device--back{width:56%;top:0;right:2%;transform:rotate(6deg);aspect-ratio:3/5}
.device--front{width:62%;bottom:0;left:0;transform:rotate(-4deg);aspect-ratio:3/5}
.device--back img{opacity:.85}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section--white{background:var(--surface)}
.section--cream{background:var(--bg)}
.section--tint{background:var(--surface-alt)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{margin-top:14px;font-size:30px;color:var(--brand)}
.section-head p{margin-top:12px;color:var(--text-sub);font-size:15.5px;line-height:1.85}
.section-head--center p{margin-left:auto;margin-right:auto}

/* ---------- download matrix ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-main{
  grid-column:span 2;grid-row:span 2;position:relative;overflow:hidden;
  border-radius:var(--radius-l);padding:38px;color:#fff;
  background:linear-gradient(140deg,#3B1E5A 0%,#57307f 58%,#7B4FA8 100%);
  box-shadow:var(--shadow-m);
}
.dl-main__glow{position:absolute;right:-80px;bottom:-90px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(255,107,90,.42),transparent 68%)}
.dl-main h3{position:relative;font-size:24px;margin-bottom:10px}
.dl-main p{position:relative;color:rgba(255,255,255,.82);font-size:14.5px}
.dl-meta{position:relative;display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 26px}
.dl-meta span{
  padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.24);font-size:13.5px;font-weight:600;
}
.dl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:24px;box-shadow:var(--shadow-s);transition:.25s ease;display:flex;flex-direction:column;gap:8px;
}
.dl-card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.dl-card__ico{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--surface-alt);color:var(--brand);font-weight:700;font-size:14px;
}
.dl-card h4{font-size:16px;color:var(--text)}
.dl-card p{font-size:13.5px;color:var(--text-sub);line-height:1.7}
.dl-card__link{font-size:13.5px;font-weight:600;color:var(--brand-soft)}

/* ---------- features ---------- */
.feature-wrap{display:grid;grid-template-columns:220px 1fr;gap:34px;align-items:start}
.feature-tabs{display:flex;flex-direction:column;gap:10px}
.feature-tabs li{
  padding:14px 18px;border-radius:var(--radius-s);border:1px solid var(--line);
  background:var(--surface);font-size:15px;font-weight:600;color:var(--text-sub);
  transition:.25s ease;cursor:default;
}
.feature-tabs li.is-on{
  background:var(--brand);color:#fff;border-color:var(--brand);
  box-shadow:0 10px 22px rgba(59,30,90,.22);
}
.feature-tabs li.is-on span{color:#FFD9D2}
.feature-tabs li span{display:block;font-size:12.5px;font-weight:500;color:var(--text-sub);margin-top:4px}
.feature-panel{
  display:grid;grid-template-columns:1.35fr 1fr;gap:26px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:26px;box-shadow:var(--shadow-s);
}
.feature-panel__img{border-radius:var(--radius-m);overflow:hidden;aspect-ratio:16/10}
.feature-panel__img img{width:100%;height:100%;object-fit:cover}
.feature-panel h3{font-size:21px;color:var(--brand);margin-bottom:10px}
.feature-panel p{font-size:14.5px;color:var(--text-sub);line-height:1.85}
.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.feature-item{
  display:flex;gap:14px;padding:20px;border-radius:var(--radius-m);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-s);
  transition:.25s ease;
}
.feature-item:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.feature-item__ico{
  flex:none;width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(47,209,176,.16);color:#177a66;font-weight:700;
}
.feature-item h4{font-size:15.5px;margin-bottom:4px}
.feature-item p{font-size:13.5px;color:var(--text-sub);line-height:1.7}

/* ---------- forum ---------- */
.forum-wrap{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start}
.forum-copy h2{margin-top:14px;font-size:30px;color:var(--brand)}
.forum-copy p{margin-top:14px;color:var(--text-sub);font-size:15.5px;line-height:1.9}
.forum-points{margin:22px 0 28px;display:grid;gap:10px}
.forum-points li{display:flex;gap:10px;font-size:14.5px;color:var(--text)}
.forum-points li::before{content:"";flex:none;width:8px;height:8px;margin-top:9px;border-radius:2px;background:var(--accent)}
.forum-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.forum-card{
  display:block;padding:20px;border-radius:var(--radius-m);background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--shadow-s);transition:.25s ease;color:var(--text);
}
.forum-card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px);color:var(--brand)}
.forum-card h4{font-size:15.5px;margin-bottom:6px}
.forum-card small{font-size:12.5px;color:var(--text-sub)}
.forum-card__arrow{display:block;margin-top:12px;font-size:14px;font-weight:700;color:var(--accent)}

/* ---------- platform pills ---------- */
.pill-row{display:flex;gap:16px;overflow-x:auto;padding:6px 0 14px;scrollbar-width:thin}
.pill-row::-webkit-scrollbar{height:6px}
.pill-row::-webkit-scrollbar-thumb{background:var(--line);border-radius:6px}
.pill{
  flex:none;display:flex;align-items:center;gap:14px;padding:16px 24px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-s);
  transition:.25s ease;min-width:220px;
}
.pill:hover{transform:translateY(-3px);box-shadow:var(--shadow-m)}
.pill__ico{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--surface-alt);color:var(--brand);font-weight:700;font-size:13px;flex:none;
}
.pill strong{display:block;font-size:15px}
.pill small{font-size:12.5px;color:var(--text-sub)}

/* ---------- stats ---------- */
.stats{
  background:
    linear-gradient(rgba(255,255,255,.6),rgba(255,255,255,.6)),
    repeating-linear-gradient(0deg,transparent,transparent 39px,rgba(59,30,90,.06) 39px,rgba(59,30,90,.06) 40px),
    repeating-linear-gradient(90deg,transparent,transparent 39px,rgba(59,30,90,.06) 39px,rgba(59,30,90,.06) 40px),
    var(--surface-alt);
  border-radius:var(--radius-l);padding:40px;
}
.stats-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:20px}
.stat{
  background:var(--surface);border-radius:var(--radius-m);border:1px solid var(--line);
  padding:26px 22px;box-shadow:var(--shadow-s);
}
.stat--big{background:var(--brand);border-color:var(--brand);color:#fff;display:flex;flex-direction:column;justify-content:center}
.stat__num{font-size:38px;font-weight:700;color:var(--brand);line-height:1.1}
.stat--big .stat__num{color:#fff;font-size:46px}
.stat__label{margin-top:8px;font-size:14px;color:var(--text-sub)}
.stat--big .stat__label{color:rgba(255,255,255,.78)}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:20px}
.timeline::before{
  content:"";position:absolute;left:6%;right:6%;top:38px;height:0;
  border-top:2px dashed rgba(123,79,168,.32);
}
.step{position:relative;padding-top:56px}
.step__dot{
  position:absolute;top:16px;left:0;width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:2px solid var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
  box-shadow:var(--shadow-s);
}
.step h4{font-size:16px;margin-bottom:8px}
.step p{font-size:14px;color:var(--text-sub);line-height:1.8}

/* ---------- scenarios ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;box-shadow:var(--shadow-s);transition:.25s ease;
}
.scene-card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.scene-card__img{overflow:hidden}
.scene-card__img img{width:100%;height:100%;object-fit:cover}
.scene-card--tall .scene-card__img{aspect-ratio:4/5}
.scene-card--mid .scene-card__img{aspect-ratio:16/10}
.scene-card--short .scene-card__img{aspect-ratio:16/9}
.scene-card__body{padding:22px}
.scene-card h3{font-size:17px;margin-bottom:8px;color:var(--brand)}
.scene-card p{font-size:14px;color:var(--text-sub);line-height:1.8}
.scene-card__link{display:inline-block;margin-top:14px;font-size:13.5px;font-weight:600;color:var(--accent)}
.scene-card__link:hover{color:var(--accent-hover)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;box-shadow:var(--shadow-s);transition:.25s ease;
}
.news-card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.news-card__link{display:block;color:inherit}
.news-card__link:hover{color:inherit}
.news-card__thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-alt)}
.news-card__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-card__thumb img{transform:scale(1.04)}
.news-card__body{padding:20px}
.news-card__meta{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.news-card__meta time{font-size:12.5px;color:var(--text-sub)}
.news-card h3{font-size:16.5px;line-height:1.55;color:var(--text)}
.news-card:hover h3{color:var(--brand)}
.news-card p{margin-top:10px;font-size:13.5px;color:var(--text-sub);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  text-align:center;padding:56px 24px;border:1px dashed var(--line);border-radius:var(--radius-l);
  background:var(--surface);box-shadow:var(--shadow-s);
}
.empty-state p{color:var(--text-sub);font-size:15px;margin-bottom:18px}

/* ---------- topics ---------- */
.topic-list{display:grid;gap:14px}
.topic{
  display:grid;grid-template-columns:96px 1fr auto;gap:22px;align-items:center;
  padding:24px 26px;border-radius:var(--radius-m);background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--shadow-s);transition:.25s ease;color:var(--text);
}
.topic:hover{box-shadow:var(--shadow-m);transform:translateY(-3px);color:var(--brand)}
.topic__num{font-size:30px;font-weight:700;color:rgba(123,79,168,.38);line-height:1}
.topic h3{font-size:17px;margin-bottom:6px}
.topic p{font-size:14px;color:var(--text-sub);line-height:1.75}
.topic__go{font-size:14px;font-weight:700;color:var(--accent);white-space:nowrap}

/* ---------- safety ---------- */
.safety-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center}
.safety-img{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-m);aspect-ratio:4/3}
.safety-img img{width:100%;height:100%;object-fit:cover}
.safety-list{display:grid;gap:14px;margin-top:24px}
.safety-list li{
  display:flex;gap:12px;padding:16px 18px;border-radius:var(--radius-s);
  background:var(--surface);border:1px solid var(--line);font-size:14.5px;line-height:1.7;
}
.safety-list li::before{
  content:"✓";flex:none;width:22px;height:22px;border-radius:50%;
  background:rgba(47,209,176,.18);color:#177a66;font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-top:2px;
}

/* ---------- mobile download ---------- */
.mobile-block{max-width:820px;margin:0 auto;text-align:center}
.mobile-showcase{
  display:grid;grid-template-columns:1fr 220px 1fr;gap:28px;align-items:center;margin-top:40px;
}
.mobile-showcase .side{font-size:14.5px;color:var(--text-sub);line-height:1.85;text-align:left}
.mobile-showcase .side strong{display:block;color:var(--text);font-size:15.5px;margin-bottom:6px}
.phone-card{
  border-radius:28px;overflow:hidden;box-shadow:var(--shadow-m);border:1px solid var(--line);
  aspect-ratio:9/16;background:var(--surface-alt);
}
.phone-card img{width:100%;height:100%;object-fit:cover}
.qr-box{
  margin-top:26px;display:inline-flex;align-items:center;gap:16px;padding:16px 22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  box-shadow:var(--shadow-s);
}
.qr-frame{
  width:76px;height:76px;border-radius:10px;border:1px dashed var(--brand-soft);
  display:flex;align-items:center;justify-content:center;color:var(--brand-soft);
  font-size:12px;text-align:center;line-height:1.3;background:var(--surface-alt);
}
.qr-box span{font-size:13.5px;color:var(--text-sub);text-align:left;max-width:220px}

/* ---------- partners ---------- */
.partner-row{
  display:grid;grid-template-columns:repeat(6,1fr);gap:18px;align-items:center;margin-top:30px;
}
.partner{
  height:64px;border-radius:var(--radius-s);background:var(--surface);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;color:#a79db2;filter:grayscale(1);transition:.25s ease;
}
.partner:hover{filter:grayscale(0);color:var(--brand);box-shadow:var(--shadow-s);transform:translateY(-2px)}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  box-shadow:var(--shadow-s);overflow:hidden;transition:box-shadow .25s ease;
}
.faq-item[open]{box-shadow:var(--shadow-m)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 52px 18px 24px;position:relative;
  font-size:15.5px;font-weight:600;color:var(--text);
  border-left:3px solid transparent;transition:.25s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open] summary{border-left-color:var(--accent);color:var(--brand)}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--brand-soft);transition:transform .25s ease;
}
.faq-item[open] summary::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.faq-item .faq-body{padding:0 24px 18px 24px;font-size:14.5px;color:var(--text-sub);line-height:1.85}

/* ---------- guarantee bar ---------- */
.guarantee{background:var(--brand-deep);color:#fff;padding:34px 0}
.guarantee-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.guarantee-item{display:flex;align-items:center;gap:12px;justify-content:center;font-size:15px;font-weight:600}
.guarantee-item i{
  width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:center;color:var(--mint);font-style:normal;font-size:14px;
}

/* ---------- cta ---------- */
.cta-card{
  position:relative;overflow:hidden;border-radius:28px;padding:56px;
  background:linear-gradient(135deg,#3B1E5A 0%,#4a2570 55%,#241035 100%);
  color:#fff;display:grid;grid-template-columns:1.4fr auto;gap:34px;align-items:center;
  box-shadow:0 24px 60px rgba(36,16,53,.28);
}
.cta-card::after{
  content:"";position:absolute;right:-70px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,90,.4),transparent 70%);
}
.cta-card::before{
  content:"";position:absolute;left:-60px;bottom:-120px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,209,176,.24),transparent 70%);
}
.cta-card h2{position:relative;font-size:28px;color:#fff}
.cta-card p{position:relative;margin-top:12px;font-size:15px;color:rgba(255,255,255,.82);line-height:1.85;max-width:640px}
.cta-actions{position:relative;display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-logo{
  font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;
  display:inline-flex;align-items:center;gap:8px;
}
.footer-logo span{width:1px;height:15px;background:rgba(255,255,255,.35)}
.site-footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.site-footer p{font-size:14px;line-height:1.85}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:13px;color:rgba(255,255,255,.55)}
.footer-bottom .container{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero h1{font-size:36px}
  .nav-menu{gap:16px}
  .nav-menu a{font-size:14.5px}
}
@media (max-width:1023px){
  .container{padding:0 22px}
  .section{padding:64px 0}
  .nav-menu,.nav-search{display:none}
  .nav-burger{display:flex}
  .nav-inner{height:68px}
  .hero{padding:130px 0 80px}
  .hero__inner{grid-template-columns:1fr;gap:44px}
  .hero__device{min-height:380px;max-width:440px;margin:0 auto}
  .hero h1{font-size:33px}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .dl-main{grid-column:span 2;grid-row:auto;padding:30px}
  .feature-wrap{grid-template-columns:1fr}
  .feature-tabs{flex-direction:row;overflow-x:auto;padding-bottom:8px}
  .feature-tabs li{flex:none;min-width:150px}
  .feature-panel{grid-template-columns:1fr}
  .feature-list{grid-template-columns:1fr 1fr}
  .forum-wrap{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:1fr 1fr;gap:22px}
  .timeline::before{display:none}
  .scene-grid{grid-template-columns:1fr 1fr}
  .news-grid{grid-template-columns:1fr 1fr}
  .safety-wrap{grid-template-columns:1fr}
  .mobile-showcase{grid-template-columns:1fr;gap:24px}
  .mobile-showcase .phone-card{max-width:240px;margin:0 auto}
  .mobile-showcase .side{text-align:center}
  .partner-row{grid-template-columns:repeat(3,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .guarantee-row{grid-template-columns:1fr 1fr;gap:16px}
  .cta-card{grid-template-columns:1fr;padding:40px 30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .hero{padding:118px 0 64px}
  .hero h1{font-size:27px;line-height:1.34}
  .hero__lead{font-size:16px}
  .hero__text{font-size:14.5px}
  .hero__actions{gap:12px}
  .hero__actions .btn{flex:1 1 150px}
  .hero__trust{gap:14px;font-size:13.5px}
  .hero__device{min-height:320px}
  .device--front{width:66%}
  h2,.section-head h2,.forum-copy h2,.cta-card h2{font-size:23px}
  .section-head{margin-bottom:30px}
  .dl-grid{grid-template-columns:1fr}
  .dl-main{grid-column:span 1;padding:26px}
  .feature-list{grid-template-columns:1fr}
  .forum-cards{grid-template-columns:1fr}
  .pill{min-width:190px;padding:14px 18px}
  .stats{padding:22px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:14px}
  .stat__num{font-size:28px}
  .stat--big .stat__num{font-size:34px}
  .stat{padding:20px 16px}
  .timeline{grid-template-columns:1fr;gap:18px}
  .step{padding-top:0;padding-left:60px;min-height:52px}
  .step__dot{top:0;left:0;width:40px;height:40px}
  .scene-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .topic{grid-template-columns:56px 1fr;gap:16px;padding:20px}
  .topic__go{grid-column:2;padding-top:4px}
  .topic__num{font-size:24px}
  .partner-row{grid-template-columns:1fr 1fr}
  .guarantee-row{grid-template-columns:1fr}
  .guarantee-item{justify-content:flex-start}
  .cta-actions .btn{flex:1 1 140px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom .container{flex-direction:column;gap:6px}
  .qr-box{flex-direction:column;text-align:center}
  .qr-box span{text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --brand:#3B1E5A;
  --brand-deep:#241035;
  --brand-soft:#7B4FA8;
  --accent:#FF6B5A;
  --accent-hover:#F04E3C;
  --mint:#2FD1B0;
  --bg:#F6F3EF;
  --surface:#FFFFFF;
  --surface-alt:#F1EAF8;
  --line:#E9E2F0;
  --text:#1A1420;
  --text-sub:#6B6172;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow-s:0 4px 14px rgba(59,30,90,.06);
  --shadow-m:0 10px 28px rgba(59,30,90,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);
}
img{max-width:100%;display:block;border:0}
h1,h2,h3,h4{margin:0;line-height:1.32;color:var(--brand)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand-soft);text-decoration:none;text-underline-offset:2px;transition:color .25s ease}
a:hover{color:var(--accent)}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(123,79,168,.35);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0;background:var(--surface)}
.section--alt{background:var(--bg)}
.section--lilac{background:var(--surface-alt)}
.section-head{max-width:720px;margin-bottom:34px}
.section-head h2{font-size:30px;font-weight:700;margin:12px 0 12px}
.section-head p{color:var(--text-sub);font-size:15.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;
  background:var(--surface-alt);color:var(--brand);font-size:12.5px;font-weight:600;letter-spacing:.3px;
}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-s);border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .25s ease,color .25s ease,box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,107,90,.28)}
.btn--primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(240,78,60,.34)}
.btn--primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(240,78,60,.24)}
.btn--ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn--ghost:hover{background:var(--surface-alt);color:var(--brand);transform:translateY(-1px)}
.btn--ghost-light{background:transparent;border-color:rgba(255,255,255,.7);color:#fff}
.btn--ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px)}
.btn--sm{padding:9px 18px;font-size:14px}
/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  background:var(--surface-alt);color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.2px;
}
.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;background:var(--surface);
  border:1px solid var(--line);color:var(--brand);font-size:13px;font-weight:600;
  transition:background .25s ease,color .25s ease,border-color .25s ease,transform .25s ease;
}
.tag:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-1px)}
/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.25);
  box-shadow:0 8px 26px rgba(36,16,53,.18);
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:76px;
  display:flex;align-items:center;gap:24px;transition:height .3s ease;
}
.logo{display:flex;align-items:center;gap:10px;color:#fff;flex:none}
.logo:hover{color:#fff}
.logo-main{font-size:17px;font-weight:700;letter-spacing:.3px;white-space:nowrap}
.logo-line{width:1px;height:16px;background:rgba(255,255,255,.5)}
.logo-sub{font-size:12px;font-weight:500;opacity:.86;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-menu a{
  position:relative;color:rgba(255,255,255,.92);font-size:15px;font-weight:500;
  padding:6px 0;white-space:nowrap;transition:color .25s ease;
}
.nav-menu a:hover{color:#fff}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-menu a:hover::after,.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;flex:none}
.nav-search{
  width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.4);
  background:transparent;color:#fff;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:.25s ease;
}
.nav-search:hover{background:rgba(255,255,255,.16)}
.nav-burger{
  display:none;width:42px;height:42px;border:0;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;gap:5px;padding:0 8px;
}
.nav-burger span{display:block;height:2px;border-radius:2px;background:#fff;transition:.3s ease}
body.drawer-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.drawer-open .nav-burger span:nth-child(2){opacity:0}
body.drawer-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.site-header.scrolled{
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-s);
}
.site-header.scrolled .nav-inner{height:64px}
.site-header.scrolled .logo,.site-header.scrolled .logo:hover{color:var(--brand)}
.site-header.scrolled .logo-line{background:var(--line)}
.site-header.scrolled .nav-menu a{color:var(--text)}
.site-header.scrolled .nav-menu a:hover{color:var(--brand-soft)}
.site-header.scrolled .nav-search{border-color:var(--line);color:var(--brand)}
.site-header.scrolled .nav-search:hover{background:var(--surface-alt)}
.site-header.scrolled .nav-burger span{background:var(--brand)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(26,20,32,.55);opacity:0;visibility:hidden;
  transition:.3s ease;z-index:95;
}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:100;
  background:var(--brand-deep);padding:88px 26px 32px;
  transform:translateX(102%);transition:transform .32s ease;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.nav-drawer a{
  display:block;color:#fff;font-size:17px;font-weight:600;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.nav-drawer a:hover{color:var(--accent)}
.nav-drawer .btn{margin-top:22px;border-bottom:0;justify-content:center}
body.drawer-open .nav-drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;color:#fff;padding:132px 0 60px;
  background:linear-gradient(142deg,#4C2B76 0%,#3B1E5A 46%,#241035 100%);
}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:url('/assets/images/8712c8c30adc41df.jpg') center/cover no-repeat;
  opacity:.15;
}
.article-hero::after{
  content:"";position:absolute;width:560px;height:560px;right:-160px;top:-200px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,90,.30),rgba(255,107,90,0) 68%);pointer-events:none;
}
.article-hero .container{position:relative;z-index:2;max-width:1080px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.66)}
.crumbs a{color:rgba(255,255,255,.86)}
.crumbs a:hover{color:var(--accent)}
.crumbs em{font-style:normal;color:rgba(255,255,255,.62)}
.article-hero .badge{
  background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.22);
  margin-top:18px;
}
.article-hero h1{
  color:#fff;font-size:40px;line-height:1.26;font-weight:700;
  margin:16px 0 18px;max-width:920px;letter-spacing:.2px;
}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:rgba(255,255,255,.74)}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--mint);opacity:.9}
.lead-box{
  margin-top:26px;max-width:860px;padding:18px 22px;
  border-left:4px solid var(--accent);border-radius:0 var(--radius-m) var(--radius-m) 0;
  background:rgba(255,255,255,.10);color:rgba(255,255,255,.9);font-size:15px;line-height:1.85;
}
/* ---------- article layout ---------- */
.article-main{padding:64px 0 72px;background:var(--surface)}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 236px;gap:56px;
  max-width:1080px;margin:0 auto;
}
.article-body{max-width:760px;font-size:16px;line-height:1.9;color:#241d2b}
.article-body h1{font-size:27px;margin:34px 0 14px;color:var(--brand)}
.article-body h2{
  font-size:24px;line-height:1.42;font-weight:700;margin:38px 0 14px;
  padding-left:14px;border-left:4px solid var(--accent);scroll-margin-top:96px;
}
.article-body h3{font-size:19px;font-weight:700;color:var(--brand);margin:26px 0 10px}
.article-body h4{font-size:17px;font-weight:700;color:var(--brand);margin:20px 0 8px}
.article-body p{margin:0 0 18px}
.article-body ul{margin:0 0 20px;padding:0;list-style:none}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--brand-soft);
}
.article-body ol{margin:0 0 20px;padding-left:22px;list-style:decimal}
.article-body ol li{margin-bottom:10px}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--surface-alt);
  border-left:4px solid var(--brand-soft);border-radius:0 var(--radius-s) var(--radius-s) 0;color:#4A3C56;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:10px;margin:22px auto;height:auto}
.article-body figure{margin:22px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-sub);margin-top:8px}
.article-body code{background:#F1EEF4;padding:2px 6px;border-radius:6px;font-size:14px}
.article-body pre{background:#F1EEF4;padding:16px;border-radius:var(--radius-s);overflow-x:auto;margin:0 0 20px}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--surface-alt);color:var(--brand);font-weight:600}
.article-body a{color:var(--brand-soft);text-decoration:underline;text-underline-offset:2px}
.article-body a:hover{color:var(--accent)}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:28px 0}
.empty-state{padding:40px 26px;border:1px dashed var(--line);border-radius:var(--radius-m);background:var(--bg);text-align:center}
.empty-state h2{border:0;padding:0;margin:0 0 10px;font-size:22px}
.empty-state p{color:var(--text-sub);margin-bottom:20px}
/* toc */
.toc{
  position:sticky;top:96px;align-self:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:18px 18px 20px;box-shadow:var(--shadow-s);
}
.toc h3{font-size:13px;color:var(--text-sub);font-weight:600;letter-spacing:.6px;margin:0 0 12px;text-transform:none}
.toc ol{list-style:none;counter-reset:toc}
.toc li{counter-increment:toc;margin-bottom:2px}
.toc a{
  display:block;padding:7px 0 7px 22px;position:relative;
  font-size:13.5px;line-height:1.5;color:var(--text-sub);border-radius:6px;transition:color .2s ease;
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);position:absolute;left:0;top:8px;
  font-size:11.5px;font-weight:700;color:var(--brand-soft);letter-spacing:.4px;
}
.toc a:hover{color:var(--accent)}
/* key points */
.keypoints-wrap{max-width:760px;margin:0 auto}
.keypoints{
  background:var(--surface);border:1px solid #E2D6F0;border-radius:var(--radius-m);
  padding:24px 26px;box-shadow:var(--shadow-s);
}
.keypoints .kp-title{
  display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--brand);
  margin:0 0 14px;padding:0;border:0;
}
.keypoints .kp-title i{
  width:26px;height:26px;border-radius:8px;background:rgba(255,107,90,.14);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-style:normal;font-size:13px;font-weight:700;
}
.keypoints ul li{position:relative;padding-left:26px;margin-bottom:12px;font-size:15px;line-height:1.8;color:#332944}
.keypoints ul li:last-child{margin-bottom:0}
.keypoints ul li::before{
  content:"";position:absolute;left:4px;top:9px;width:11px;height:6px;
  border-left:2px solid var(--mint);border-bottom:2px solid var(--mint);transform:rotate(-45deg);
}
/* tag row */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:760px;margin:0 auto}
.tag-row-head{
  display:flex;align-items:center;gap:10px;max-width:760px;margin:0 auto 16px;
  font-size:14px;font-weight:600;color:var(--text-sub);
}
.tag-row-head::after{content:"";flex:1;height:1px;background:var(--line)}
/* related */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rec-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);overflow:hidden;box-shadow:var(--shadow-s);
  transition:transform .25s ease,box-shadow .25s ease;
}
.rec-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-m)}
.rec-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-alt)}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.rec-card:hover .rec-thumb img{transform:scale(1.04)}
.rec-body{padding:18px 20px 22px;display:flex;flex-direction:column;flex:1}
.rec-body .tag{align-self:flex-start;font-size:12px;padding:3px 10px;margin-bottom:10px}
.rec-body h3{font-size:16.5px;font-weight:700;line-height:1.5;margin:0 0 8px}
.rec-body h3 a{color:var(--brand)}
.rec-body h3 a:hover{color:var(--accent)}
.rec-body p{font-size:14px;color:var(--text-sub);line-height:1.7;margin:0 0 14px}
.rec-time{margin-top:auto;font-size:12.5px;color:#948BA0}
.rec-empty{
  grid-column:1/-1;padding:34px 24px;text-align:center;border:1px dashed var(--line);
  border-radius:var(--radius-m);background:var(--surface);color:var(--text-sub);
}
.rec-empty strong{display:block;color:var(--brand);font-size:16px;margin-bottom:8px}
.rec-empty a{font-weight:600}
/* continue nav */
.continue-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:22px 26px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);box-shadow:var(--shadow-s);
}
.continue-bar .cont-text{font-size:15px;color:var(--text-sub)}
.continue-bar .cont-text strong{color:var(--brand);font-size:16px;margin-right:8px}
.continue-actions{display:flex;gap:12px;flex-wrap:wrap}
/* cta */
.cta-card{
  position:relative;overflow:hidden;border-radius:var(--radius-l);
  background:radial-gradient(circle at 86% 14%, #5B3585 0%, #3B1E5A 52%, #241035 100%);
  color:#fff;padding:48px 52px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:0 18px 44px rgba(36,16,53,.22);
}
.cta-card::after{
  content:"";position:absolute;width:340px;height:340px;right:-90px;bottom:-160px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,90,.34),rgba(255,107,90,0) 70%);pointer-events:none;
}
.cta-card h2{color:#fff;font-size:28px;line-height:1.36;margin-bottom:12px;position:relative;z-index:2}
.cta-card p{color:rgba(255,255,255,.78);font-size:15px;max-width:520px;position:relative;z-index:2}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:none;position:relative;z-index:2}
/* footer */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.72);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.site-footer h4{color:#fff;font-size:14px;font-weight:600;margin:0 0 16px}
.footer-logo{
  display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16.5px;margin-bottom:14px;
}
.footer-logo span{width:1px;height:14px;background:rgba(255,255,255,.4)}
.site-footer p{margin:0;line-height:1.85;color:rgba(255,255,255,.66);max-width:420px}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(255,255,255,.72)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;font-size:13px;color:rgba(255,255,255,.56)}
.footer-bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:var(--accent)}
/* ---------- responsive ---------- */
@media (max-width:1279px){
  .nav-menu{gap:14px}
  .nav-menu a{font-size:14px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .nav-burger{display:flex}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .article-hero h1{font-size:32px}
  .article-hero{padding:118px 0 48px}
  .section{padding:64px 0}
  .rec-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-card{flex-direction:column;align-items:flex-start;padding:38px 32px;gap:24px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-inner{padding:0 18px;height:64px;gap:12px}
  .logo-main{font-size:15px}
  .logo-sub{font-size:11px}
  .logo-line{height:14px}
  .nav-right{gap:8px}
  .nav-right .btn--sm{display:none}
  .article-hero{padding:104px 0 40px}
  .article-hero h1{font-size:26px;line-height:1.34;margin:14px 0 14px}
  .lead-box{font-size:14px;padding:14px 16px}
  .article-main{padding:44px 0 52px}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body h2{font-size:20px}
  .article-body h3{font-size:17.5px}
  .section{padding:52px 0}
  .section-head h2{font-size:23px}
  .rec-grid{grid-template-columns:1fr}
  .keypoints{padding:20px}
  .continue-bar{flex-direction:column;align-items:flex-start;padding:20px}
  .continue-actions{width:100%}
  .continue-actions .btn{flex:1}
  .cta-card{padding:28px 22px;border-radius:var(--radius-m)}
  .cta-card h2{font-size:21px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:34px}
}
@media (max-width:520px){
  .logo-sub{display:none}
  .logo-line{display:none}
  .article-hero h1{font-size:23px}
  .article-meta{font-size:13px;gap:8px 16px}
  .crumbs{font-size:12px}
}

/* roulang page: category1 */
:root{
  --brand:#3B1E5A;
  --brand-deep:#241035;
  --brand-soft:#7B4FA8;
  --accent:#FF6B5A;
  --accent-hover:#F04E3C;
  --mint:#2FD1B0;
  --bg:#F6F3EF;
  --surface:#FFFFFF;
  --surface-alt:#F1EAF8;
  --line:#E9E2F0;
  --text:#1A1420;
  --text-sub:#6B6172;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:22px;
  --shadow-s:0 4px 14px rgba(59,30,90,.06);
  --shadow-m:0 10px 28px rgba(59,30,90,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-soft);text-decoration:none;text-underline-offset:2px;transition:color .25s ease}
a:hover{color:var(--accent)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.35;color:var(--brand)}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-s);border:1.5px solid transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background .25s ease,color .25s ease,box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,107,90,.28)}
.btn--primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(240,78,60,.34)}
.btn--primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(240,78,60,.24)}
.btn--ghost{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn--ghost:hover{background:var(--surface-alt);color:var(--brand);transform:translateY(-1px)}
.btn--ghost-light{background:transparent;border-color:rgba(255,255,255,.7);color:#fff}
.btn--ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;transform:translateY(-1px)}
.btn--sm{padding:9px 18px;font-size:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;background:var(--surface-alt);
  color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.2px;
}
.tag{
  display:inline-block;padding:4px 10px;border-radius:999px;
  background:var(--surface-alt);color:var(--brand);font-size:12px;font-weight:600;
}
.tag--mint{background:rgba(47,209,176,.14);color:#177a66}
.tag--accent{background:rgba(255,107,90,.14);color:#b93a2a}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid rgba(255,255,255,.25);
  box-shadow:0 8px 26px rgba(36,16,53,.18);
  transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:76px;
  display:flex;align-items:center;gap:24px;transition:height .3s ease;
}
.logo{display:flex;align-items:center;gap:10px;color:#fff;flex:none}
.logo:hover{color:#fff}
.logo-main{font-size:17px;font-weight:700;letter-spacing:.3px}
.logo-line{width:1px;height:16px;background:rgba(255,255,255,.5)}
.logo-sub{font-size:12px;font-weight:500;opacity:.86}
.nav-menu{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-menu a{
  position:relative;color:rgba(255,255,255,.92);font-size:15px;font-weight:500;
  padding:6px 0;white-space:nowrap;transition:color .25s ease;
}
.nav-menu a:hover{color:#fff}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-menu a:hover::after,.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;flex:none}
.nav-search{
  width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.4);
  background:transparent;color:#fff;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:.25s ease;
}
.nav-search:hover{background:rgba(255,255,255,.16)}
.nav-burger{
  display:none;width:42px;height:42px;border:0;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;gap:5px;padding:0 8px;
}
.nav-burger span{display:block;height:2px;border-radius:2px;background:#fff;transition:.3s ease}
body.drawer-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.drawer-open .nav-burger span:nth-child(2){opacity:0}
body.drawer-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.site-header.is-solid,.site-header.scrolled{
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-s);
}
.site-header.is-solid .nav-inner,.site-header.scrolled .nav-inner{height:64px}
.site-header.is-solid .logo,.site-header.is-solid .logo:hover,
.site-header.scrolled .logo,.site-header.scrolled .logo:hover{color:var(--brand)}
.site-header.is-solid .logo-line,.site-header.scrolled .logo-line{background:var(--line)}
.site-header.is-solid .nav-menu a,.site-header.scrolled .nav-menu a{color:var(--text)}
.site-header.is-solid .nav-menu a:hover,.site-header.scrolled .nav-menu a:hover{color:var(--brand-soft)}
.site-header.is-solid .nav-search,.site-header.scrolled .nav-search{border-color:var(--line);color:var(--brand)}
.site-header.is-solid .nav-search:hover,.site-header.scrolled .nav-search:hover{background:var(--surface-alt)}
.site-header.is-solid .nav-burger span,.site-header.scrolled .nav-burger span{background:var(--brand)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(26,20,32,.55);opacity:0;visibility:hidden;
  transition:.3s ease;z-index:95;
}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:100;
  background:var(--brand-deep);padding:88px 26px 32px;
  transform:translateX(102%);transition:transform .32s ease;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.nav-drawer a{
  display:block;color:#fff;font-size:17px;font-weight:600;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.nav-drawer a:hover{color:var(--accent)}
.nav-drawer .btn{margin-top:22px;border-bottom:0;justify-content:center}
body.drawer-open .nav-drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}

/* ============ 分类标题带 ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:128px 0 56px;
  background-image:linear-gradient(135deg,rgba(241,234,248,.97),rgba(252,240,236,.95)),url('/assets/images/8712c8c30adc41df.jpg');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.cat-hero::after{
  content:"";position:absolute;right:-130px;top:-90px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(123,79,168,.18),transparent 70%);pointer-events:none;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-sub);margin-bottom:18px}
.breadcrumb a{color:var(--text-sub)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span.sep{opacity:.55}
.cat-hero__row{display:flex;align-items:flex-start;justify-content:space-between;gap:36px;position:relative;z-index:1}
.cat-hero__text{max-width:760px}
.cat-hero h1{
  margin:14px 0 16px;
  font-size:clamp(26px,3.4vw,38px);
  font-weight:700;color:var(--brand);letter-spacing:0;
}
.cat-hero p{color:var(--text-sub);font-size:15.5px;line-height:1.85;margin-bottom:10px}
.back-home{
  flex:none;margin-top:6px;font-size:14px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:999px;
  background:rgba(255,255,255,.7);border:1px solid var(--line);transition:.25s ease;white-space:nowrap;
}
.back-home:hover{background:var(--surface);color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-s)}

/* ============ 数据概览 ============ */
.cat-stats{background:var(--surface);padding:44px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.stat-pill{
  display:flex;align-items:baseline;gap:10px;padding:14px 22px;border-radius:999px;
  background:var(--surface-alt);border:1px solid var(--line);
}
.stat-pill strong{font-size:22px;font-weight:700;color:var(--brand);line-height:1.2}
.stat-pill span{font-size:13px;color:var(--text-sub)}

/* ============ 场景说明 ============ */
.scene-section{padding:88px 0;background:var(--bg)}
.scene-grid{display:grid;grid-template-columns:0.88fr 1.12fr;gap:44px;align-items:start}
.scene-intro h2{font-size:clamp(23px,2.5vw,30px);font-weight:700;margin-bottom:16px}
.scene-intro p{color:var(--text-sub);margin-bottom:14px}
.scene-intro .btn{margin-top:10px}
.scene-cards{display:grid;gap:16px}
.scene-card{
  display:grid;grid-template-columns:150px minmax(0,1fr);gap:18px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:14px;box-shadow:var(--shadow-s);transition:box-shadow .25s ease,transform .25s ease;
}
.scene-card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.scene-card img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-s)}
.scene-card h3{font-size:16px;font-weight:600;margin-bottom:6px}
.scene-card p{font-size:14px;line-height:1.7;color:var(--text-sub)}

/* ============ 列表 + 侧栏 ============ */
.list-section{background:var(--surface);padding:88px 0}
.list-grid{display:grid;grid-template-columns:2.05fr 1fr;gap:36px;align-items:start}
.section-head{margin-bottom:26px}
.section-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;margin-bottom:10px}
.section-head p{color:var(--text-sub);font-size:15px}
.post-card{
  display:grid;grid-template-columns:196px minmax(0,1fr);gap:20px;
  padding:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);box-shadow:var(--shadow-s);
  margin-bottom:18px;transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.post-card:hover{box-shadow:var(--shadow-m);transform:translateY(-3px);border-color:#dcd1ec}
.post-card__thumb{display:block;border-radius:var(--radius-s);overflow:hidden}
.post-card__thumb img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-card__thumb img{transform:scale(1.04)}
.post-card__meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px;font-size:12.5px;color:var(--text-sub)}
.post-card h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:8px}
.post-card h3 a{color:var(--text)}
.post-card h3 a:hover{color:var(--accent)}
.post-card p{font-size:14px;line-height:1.72;color:var(--text-sub);margin-bottom:10px}
.post-card__link{font-size:13.5px;font-weight:600;color:var(--brand-soft)}
.post-card__link:hover{color:var(--accent)}
.empty-box{
  border:1px dashed var(--line);border-radius:var(--radius-m);background:var(--surface-alt);
  padding:44px 24px;text-align:center;
}
.empty-box strong{display:block;color:var(--brand);font-size:16px;margin-bottom:6px}
.empty-box em{display:block;font-style:normal;font-size:13px;color:var(--text-sub)}
.list-more{margin-top:26px}
.list-more a{
  display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:var(--radius-s);
  border:1.5px solid var(--brand);color:var(--brand);font-size:14px;font-weight:600;
  transition:.25s ease;
}
.list-more a:hover{background:var(--surface-alt);color:var(--brand);transform:translateY(-1px)}
.side-panel{position:sticky;top:88px;display:grid;gap:20px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:22px;box-shadow:var(--shadow-s);
}
.side-card h3{font-size:16px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--accent)}
.filter-tags{display:flex;flex-wrap:wrap;gap:8px}
.filter-tags span{
  display:inline-block;padding:5px 12px;border-radius:999px;background:var(--surface-alt);
  color:var(--brand);font-size:12.5px;font-weight:600;cursor:default;transition:.25s ease;
}
.filter-tags span:hover{background:rgba(255,107,90,.14);color:#b93a2a}
.side-list li{padding:11px 0;border-bottom:1px dashed var(--line);display:flex;gap:10px;align-items:flex-start}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list .num{
  flex:none;width:22px;height:22px;border-radius:6px;background:var(--surface-alt);color:var(--brand-soft);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.side-list a{font-size:14px;line-height:1.6;color:var(--text)}
.side-list a:hover{color:var(--accent)}
.side-entry{
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  border-radius:var(--radius-m);padding:24px;color:#fff;
}
.side-entry h3{color:#fff;font-size:16px;font-weight:600;margin-bottom:8px}
.side-entry p{font-size:13.5px;line-height:1.7;color:rgba(255,255,255,.76);margin-bottom:16px}
.side-entry a{
  display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:#fff;
  padding:10px 18px;border-radius:var(--radius-s);font-size:14px;font-weight:600;transition:.25s ease;
}
.side-entry a:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px)}

/* ============ 热门专题 ============ */
.topic-section{background:var(--surface-alt);padding:88px 0}
.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:8px}
.topic-item{
  display:flex;gap:18px;align-items:flex-start;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-m);padding:22px 24px;
  box-shadow:var(--shadow-s);transition:box-shadow .25s ease,transform .25s ease;
}
.topic-item:hover{box-shadow:var(--shadow-m);transform:translateY(-3px)}
.topic-num{
  flex:none;font-size:30px;font-weight:700;line-height:1;color:rgba(123,79,168,.42);
  font-variant-numeric:tabular-nums;
}
.topic-item h3{font-size:16px;font-weight:600;line-height:1.55;margin-bottom:6px}
.topic-item h3 a{color:var(--text)}
.topic-item h3 a:hover{color:var(--accent)}
.topic-item p{font-size:13.5px;line-height:1.7;color:var(--text-sub)}

/* ============ 使用步骤 ============ */
.step-section{background:var(--surface);padding:88px 0}
.step-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:32px;position:relative}
.step-card{
  position:relative;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:26px 22px;transition:box-shadow .25s ease,transform .25s ease,background .25s ease;
}
.step-card:hover{background:var(--surface);box-shadow:var(--shadow-m);transform:translateY(-3px)}
.step-card .dot{
  width:34px;height:34px;border-radius:50%;background:var(--accent);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
  margin-bottom:14px;box-shadow:0 6px 16px rgba(255,107,90,.3);
}
.step-card h3{font-size:16px;font-weight:600;margin-bottom:8px}
.step-card p{font-size:13.5px;line-height:1.72;color:var(--text-sub)}

/* ============ FAQ ============ */
.faq-section{background:var(--bg);padding:88px 0}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px;align-items:start}
.faq-item{
  position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-m);box-shadow:var(--shadow-s);transition:.25s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);
  opacity:0;transition:opacity .25s ease;
}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:18px 22px;font-size:15px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-q:hover{color:var(--brand-soft)}
.faq-icon{position:relative;flex:none;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand-soft);border-radius:2px;transition:transform .25s ease;
}
.faq-icon::before{left:0;right:0;top:7px;height:2px}
.faq-icon::after{top:0;bottom:0;left:7px;width:2px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-item.is-open .faq-a{max-height:340px}
.faq-a p{padding:0 22px 20px;font-size:14px;line-height:1.8;color:var(--text-sub)}

/* ============ 推荐与收口 ============ */
.reco-section{background:var(--surface);padding:80px 0 88px}
.reco-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:24px}
.reco-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700}
.reco-head p{font-size:14px;color:var(--text-sub)}
.reco-list{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.reco-list a{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;
  background:var(--surface-alt);color:var(--brand);font-size:14px;font-weight:500;transition:.25s ease;
}
.reco-list a:hover{background:rgba(255,107,90,.14);color:#b93a2a;transform:translateY(-1px)}
.cta-card{
  position:relative;overflow:hidden;background:linear-gradient(130deg,var(--brand) 0%,var(--brand-deep) 100%);
  border-radius:var(--radius-l);padding:48px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-card::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,90,.34),transparent 68%);pointer-events:none;
}
.cta-card__text{max-width:600px;position:relative;z-index:1}
.cta-card h2{color:#fff;font-size:clamp(22px,2.4vw,28px);font-weight:700;margin-bottom:12px}
.cta-card p{color:rgba(255,255,255,.78);font-size:15px;line-height:1.8}
.cta-card__actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;flex:none}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.72);padding:66px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:48px}
.footer-logo{
  display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700;margin-bottom:14px;
}
.footer-logo span{display:inline-block;width:1px;height:14px;background:rgba(255,255,255,.4)}
.site-footer h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66)}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(255,255,255,.72);font-size:14px}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom span,.footer-bottom a{font-size:13px;color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--accent)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .nav-menu{gap:16px}
  .nav-menu a{font-size:14px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .nav-search{display:none}
  .nav-burger{display:flex}
  .cat-hero{padding:112px 0 46px}
  .cat-hero__row{flex-direction:column;gap:18px}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:1fr;gap:28px}
  .list-grid{grid-template-columns:1fr;gap:30px}
  .side-panel{position:static}
  .topic-grid{grid-template-columns:1fr}
  .step-track{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-card{flex-direction:column;align-items:flex-start;padding:38px}
  .scene-section,.list-section,.topic-section,.step-section,.faq-section{padting:64px 0}
  .scene-section,.list-section,.topic-section,.step-section,.faq-section{padding:64px 0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-inner{padding:0 18px}
  .logo-main{font-size:15px}
  .logo-sub{display:none}
  .logo-line{display:none}
  .cat-hero{padding:100px 0 40px}
  .cat-hero p{font-size:14.5px}
  .stat-grid{grid-template-columns:1fr;gap:12px}
  .stat-pill{border-radius:var(--radius-m);padding:12px 18px}
  .scene-card{grid-template-columns:1fr}
  .scene-card img{aspect-ratio:16/9}
  .post-card{grid-template-columns:1fr;padding:14px}
  .post-card__thumb img{aspect-ratio:16/9}
  .step-track{grid-template-columns:1fr}
  .reco-section{padding:56px 0 64px}
  .cta-card{padding:30px 24px;border-radius:var(--radius-m)}
  .cta-card__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:34px}
  .scene-section,.list-section,.topic-section,.step-section,.faq-section{padding:52px 0}
  .site-footer{padding-top:48px}
  .topic-item{padding:18px}
  .topic-num{font-size:24px}
}
@media (max-width:520px){
  .reco-list a{width:100%;justify-content:flex-start}
  .back-home{font-size:13px}
}