/* roulang page: index */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF2FA;
  --c-primary:#2456D6;
  --c-primary-deep:#17389B;
  --c-primary-soft:#E4EBFF;
  --c-accent:#FF7A3C;
  --c-accent-soft:#FFEDE3;
  --c-ink:#101B33;
  --c-text:#33415C;
  --c-muted:#6B7A94;
  --c-line:#E3E9F4;
  --c-success:#12A594;
  --c-warn:#E8A317;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-xl:26px;
  --sh-1:0 1px 2px rgba(16,27,51,.05);
  --sh-2:0 8px 24px -12px rgba(16,27,51,.18);
  --sh-3:0 24px 48px -24px rgba(23,56,155,.28);
  --maxw:1200px;
  --gutter:24px;
  --font-base:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-base);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color .16s ease-out}
a:hover{color:var(--c-primary-deep)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;letter-spacing:-0.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
figure{margin:0}
:focus-visible{outline:3px solid rgba(36,86,214,.28);outline-offset:2px;border-radius:4px}
.container-x{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1200;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .16s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.nav-wrap{display:flex;align-items:center;gap:22px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:24px;height:24px;border-radius:7px;
  background:var(--c-primary);
  position:relative;flex:0 0 24px;
}
.logo-mark::before{
  content:"";position:absolute;left:6px;top:6px;width:8px;height:8px;
  border-radius:2px;background:#fff;
}
.logo-mark::after{
  content:"";position:absolute;right:5px;bottom:5px;width:6px;height:6px;
  border-radius:50%;background:var(--c-accent);
}
.logo-text{display:flex;align-items:baseline;gap:6px;white-space:nowrap}
.logo-main{font-size:18px;font-weight:700;color:var(--c-ink);letter-spacing:-0.01em}
.logo-sub{font-size:13px;color:var(--c-muted)}
.logo:hover .logo-main{color:var(--c-primary)}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-main a{
  position:relative;display:inline-flex;align-items:center;height:68px;
  padding:0 12px;font-size:15px;color:var(--c-text);white-space:nowrap;
}
.nav-main a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:16px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;transition:transform .16s ease-out;
}
.nav-main a:hover{color:var(--c-primary)}
.nav-main a:hover::after{transform:scaleX(1)}
.nav-main a.is-active{color:var(--c-primary);font-weight:600}
.nav-main a.is-active::after{transform:scaleX(1)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-search{
  position:relative;width:220px;height:38px;flex:0 0 auto;
  display:flex;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-sm);
  padding:0 8px 0 32px;
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.nav-search:hover{border-color:#CFDCF5}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(36,86,214,.15)}
.nav-search svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:15px;height:15px;stroke:var(--c-muted);fill:none;stroke-width:1.6}
.nav-search input{
  border:0;outline:0;background:transparent;width:100%;height:100%;
  font-size:14px;color:var(--c-ink);padding:0;
}
.nav-search input::placeholder{color:var(--c-muted)}
.nav-kbd{
  flex:0 0 auto;height:20px;min-width:20px;padding:0 5px;border-radius:var(--r-sm);
  background:var(--c-surface-2);color:var(--c-muted);
  font-family:var(--font-mono);font-size:11px;line-height:20px;text-align:center;
}
.nav-sub{font-size:14px;color:var(--c-muted);white-space:nowrap}
.nav-sub:hover{color:var(--c-primary)}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  background:var(--c-surface);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);position:relative;border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- buttons ---------- */
.ui-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .16s ease-out,box-shadow .16s ease-out;
  white-space:nowrap;
}
.ui-btn--primary{background:var(--c-primary);color:#fff}
.ui-btn--primary:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.ui-btn--primary:active{transform:translateY(0);box-shadow:inset 0 1px 2px rgba(0,0,0,.12)}
.ui-btn--accent{background:var(--c-accent);color:#fff}
.ui-btn--accent:hover{background:#EF6A2A;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.ui-btn--line{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line)}
.ui-btn--line:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px)}
.ui-btn--ghost{background:transparent;color:var(--c-primary)}
.ui-btn--ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-deep)}
.ui-btn--sm{height:38px;padding:0 16px;font-size:14px}
.ui-btn[disabled],.ui-btn.is-disabled{cursor:not-allowed;opacity:.55;transform:none;box-shadow:none}

/* ---------- badges ---------- */
.badge-x{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-sm);
  font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
}
.badge-cat{background:var(--c-surface-2);color:var(--c-text)}
.badge-ver{background:var(--c-primary-soft);color:var(--c-primary-deep)}
.badge-ok{background:rgba(18,165,148,.1);color:var(--c-success)}
.badge-accent{background:var(--c-accent-soft);color:#C4521C}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:88px 0 72px;
  background:
    radial-gradient(circle at 1px 1px, rgba(36,86,214,.10) 1px, transparent 0) 0 0/22px 22px,
    var(--c-bg);
}
.hero::before{
  content:"";position:absolute;right:-6%;top:-12%;width:46%;height:130%;
  background:var(--c-primary-soft);opacity:.55;border-radius:var(--r-xl);z-index:0;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr 1fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700;letter-spacing:-0.01em}
.hero h1 em{font-style:normal;color:var(--c-primary)}
.hero-lead{margin-top:20px;font-size:17px;line-height:1.85;color:var(--c-text);max-width:560px}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:12px}
.hero-trust{
  margin-top:22px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  font-size:13px;color:var(--c-muted);
}
.hero-trust span{display:inline-flex;align-items:center;gap:14px}
.hero-trust span+span::before{content:"";width:1px;height:12px;background:var(--c-line);display:inline-block}
.hero-visual{position:relative}
.hero-visual::before{
  content:"";position:absolute;left:-12px;top:12px;width:100%;height:100%;
  background:var(--c-primary-soft);border-radius:var(--r-xl);z-index:0;
}
.hero-frame{
  position:relative;z-index:1;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-xl);padding:10px;
  box-shadow:var(--sh-3);
}
.hero-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:calc(var(--r-xl) - 10px);background:var(--c-surface-2)}

/* ---------- section basics ---------- */
.section{padding:88px 0}
.section--tight{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.3;font-weight:700}
.section-head .sub{margin-top:10px;font-size:15px;color:var(--c-muted);max-width:640px;line-height:1.75}
.section-head .more{font-size:14px;color:var(--c-primary);font-weight:600;white-space:nowrap}
.section-head .more:hover{color:var(--c-primary-deep)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary);
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--c-primary);border-radius:2px}

/* ---------- value band ---------- */
.value-band{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.value-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.value-media{
  border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;
  background:var(--c-surface-2);box-shadow:var(--sh-1);
}
.value-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.value-list{display:flex;flex-direction:column}
.value-item{
  position:relative;display:grid;grid-template-columns:24px 1fr;gap:16px;
  padding:22px 0 22px 18px;
  transition:background-color .16s ease-out;
}
.value-item+.value-item{border-top:1px dashed var(--c-line)}
.value-item::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleY(0);transform-origin:top center;transition:transform .16s ease-out;
}
.value-item:hover::before{transform:scaleY(1)}
.value-ico{width:22px;height:22px;stroke:var(--c-primary);fill:none;stroke-width:1.5;margin-top:2px}
.value-item h3{font-size:17px;font-weight:600;line-height:1.5;transition:color .16s ease-out}
.value-item:hover h3{color:var(--c-primary)}
.value-item p{margin-top:6px;font-size:15px;line-height:1.75;color:var(--c-text)}
.value-item .param{margin-top:6px;font-size:13px;color:var(--c-muted);font-family:var(--font-mono)}

/* ---------- shot rail ---------- */
.rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.rail-nav{display:flex;gap:10px;flex:0 0 auto}
.rail-btn{
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--c-line);background:var(--c-surface);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .16s ease-out,background-color .16s ease-out,transform .16s ease-out;
}
.rail-btn svg{width:16px;height:16px;stroke:var(--c-ink);fill:none;stroke-width:1.8}
.rail-btn:hover{border-color:var(--c-primary);background:var(--c-primary-soft)}
.rail-btn:hover svg{stroke:var(--c-primary-deep)}
.shot-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:6px;scrollbar-width:none;-ms-overflow-style:none;
}
.shot-track::-webkit-scrollbar{display:none}
.shot-card{
  scroll-snap-align:start;flex:0 0 clamp(240px,86%,360px);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.shot-card:hover{border-color:#CFDCF5;box-shadow:var(--sh-2);transform:translateY(-2px)}
.shot-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-surface-2)}
.shot-body{padding:16px 18px 20px}
.shot-body h3{font-size:15px;font-weight:600}
.shot-body p{margin-top:6px;font-size:14px;line-height:1.7;color:var(--c-muted)}
.rail-progress{margin-top:20px;height:2px;background:var(--c-line);border-radius:2px;overflow:hidden}
.rail-progress i{display:block;height:100%;width:22%;background:var(--c-primary);border-radius:2px;transition:width .18s ease-out}

/* ---------- specs ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.spec-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px 26px 20px;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.spec-card:hover{border-color:#CFDCF5;box-shadow:var(--sh-2)}
.spec-head{display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.spec-head svg{width:22px;height:22px;stroke:var(--c-primary);fill:none;stroke-width:1.5;flex:0 0 22px}
.spec-head h3{font-size:18px;font-weight:600}
.spec-head .badge-x{margin-left:auto}
.spec-rows{margin-top:6px}
.spec-row{
  display:flex;align-items:center;gap:16px;
  padding:12px 0;border-bottom:1px dashed var(--c-line);font-size:14px;
}
.spec-row:last-child{border-bottom:0}
.spec-row dt{color:var(--c-muted);flex:0 0 auto;min-width:74px}
.spec-row dd{margin-left:auto;text-align:right;color:var(--c-ink);font-family:var(--font-mono);font-size:13px}
.spec-row .tick{width:16px;height:16px;stroke:var(--c-success);fill:none;stroke-width:2;flex:0 0 16px}
.spec-foot{margin-top:22px;font-size:14px;color:var(--c-muted)}
.spec-foot a{font-weight:600}

/* ---------- reviews ---------- */
.review-wrap{background:var(--c-surface-2)}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.review-card{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.review-card:hover{border-color:#CFDCF5;box-shadow:var(--sh-2)}
.review-card:nth-child(2){margin-top:26px}
.review-card:nth-child(5){margin-top:20px}
.review-card::after{
  content:"”";position:absolute;right:18px;top:6px;
  font-size:64px;line-height:1;color:var(--c-primary);opacity:.08;font-family:Georgia,serif;
}
.stars{display:flex;gap:3px;margin-bottom:12px}
.stars svg{width:15px;height:15px;fill:var(--c-accent)}
.review-card p{font-size:15px;line-height:1.75;color:var(--c-text)}
.review-user{display:flex;align-items:center;gap:10px;margin-top:16px;padding-top:14px;border-top:1px solid var(--c-line)}
.avatar{
  width:32px;height:32px;border-radius:50%;flex:0 0 32px;
  background:var(--c-primary-soft);color:var(--c-primary-deep);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;
}
.review-user b{display:block;font-size:14px;font-weight:600;color:var(--c-ink);line-height:1.4}
.review-user small{font-size:12px;color:var(--c-muted);font-family:var(--font-mono)}

/* ---------- download block ---------- */
.download-block{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:36px 40px;box-shadow:var(--sh-1);
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.download-block h2{font-size:clamp(22px,2.4vw,30px);line-height:1.35}
.download-block .desc{margin-top:10px;font-size:15px;color:var(--c-muted);line-height:1.75;max-width:560px}
.download-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.download-note{grid-column:1/-1;font-size:13px;color:var(--c-muted);border-top:1px solid var(--c-line);padding-top:16px}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:24px}
.news-feature-card{
  display:block;height:100%;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);color:inherit;
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.news-feature-card:hover{border-color:#CFDCF5;box-shadow:var(--sh-2);transform:translateY(-2px);color:inherit}
.news-feature-media{background:var(--c-surface-2)}
.news-feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.news-feature-body{padding:22px 24px 24px}
.news-feature-body h3{margin-top:12px;font-size:18px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-feature-body p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;justify-content:space-between;margin-top:16px;font-size:13px;color:var(--c-muted)}
.news-meta .link-more{color:var(--c-primary);font-weight:600}
.news-list{display:flex;flex-direction:column;gap:14px}
.news-row{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:16px 18px;color:inherit;
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.news-row:hover{border-color:#CFDCF5;box-shadow:var(--sh-1);transform:translateX(2px);color:inherit}
.news-row h3{
  font-size:15px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
}
.news-row-time{font-size:12px;color:var(--c-muted);white-space:nowrap}
.news-empty{
  grid-column:1/-1;min-height:180px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-lg);
  padding:36px 24px;text-align:center;
}
.news-empty svg{width:28px;height:28px;stroke:var(--c-muted);fill:none;stroke-width:1.5}
.news-empty strong{font-size:15px;font-weight:600;color:var(--c-ink)}
.news-empty span{font-size:13px;color:var(--c-muted)}

/* ---------- faq ---------- */
.faq-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px 32px;align-items:start}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  margin-bottom:14px;overflow:hidden;
  transition:border-color .16s ease-out,background-color .16s ease-out,box-shadow .16s ease-out;
}
.faq-item[open]{border-color:#CFDCF5;background:#FBFCFE;box-shadow:inset 3px 0 0 var(--c-primary)}
.faq-q{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 52px 18px 22px;font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.55;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"";position:absolute;right:24px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--c-muted);border-bottom:2px solid var(--c-muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .18s ease-out,border-color .18s ease-out;
}
.faq-item[open] .faq-q::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--c-primary)}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--c-text)}

/* ---------- cta strip ---------- */
.cta-strip{background:var(--c-surface-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:44px 0;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35}
.cta-inner p{margin-top:8px;font-size:15px;color:var(--c-muted)}

/* ---------- footer ---------- */
.site-footer{background:var(--c-surface-2);border-top:1px solid var(--c-line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-muted);max-width:300px}
.footer-col h4{
  display:flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:16px;
}
.footer-col h4::before{content:"";width:16px;height:2px;background:var(--c-primary);border-radius:2px}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:14px;color:var(--c-text);display:inline-block;transition:color .16s ease-out,transform .16s ease-out}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px)}
.footer-qr{
  width:88px;height:88px;border-radius:var(--r-md);
  background:var(--c-surface);border:1px dashed var(--c-line);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--c-muted);text-align:center;line-height:1.5;margin-top:14px;
}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;
  font-size:13px;color:var(--c-muted);
}
.footer-bottom .sep{color:var(--c-line)}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:1500;background:rgba(16,27,51,.35);
  opacity:0;visibility:hidden;transition:opacity .18s ease-out,visibility .18s ease-out;
}
.mobile-drawer.is-open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;inset:0;background:var(--c-surface);
  display:flex;flex-direction:column;padding:16px 18px 0;
  transform:translateY(-8px);transition:transform .18s ease-out;
  overflow-y:auto;
}
.mobile-drawer.is-open .drawer-panel{transform:translateY(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:56px;flex:0 0 56px}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  background:var(--c-surface);cursor:pointer;font-size:18px;line-height:1;color:var(--c-ink);
}
.drawer-search{position:relative;margin:12px 0 8px;height:42px;display:flex;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);padding:0 12px 0 34px}
.drawer-search svg{position:absolute;left:12px;width:15px;height:15px;stroke:var(--c-muted);fill:none;stroke-width:1.6}
.drawer-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--c-ink)}
.drawer-nav{display:flex;flex-direction:column;margin-top:8px}
.drawer-nav a{
  display:flex;align-items:center;height:52px;font-size:16px;color:var(--c-text);
  border-bottom:1px solid var(--c-line);
}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600}
.drawer-cta{padding:16px 0 24px;margin-top:auto}
.drawer-cta .ui-btn{width:100%;height:48px}

/* ---------- sticky mobile download ---------- */
.sticky-dl{display:none}

/* ---------- breakpoints ---------- */
@media (min-width:576px){
  .shot-card{flex-basis:46%}
}
@media (max-width:1199px){
  .nav-search{display:none}
  .hero-grid{gap:36px}
}
@media (max-width:991px){
  .nav-main,.nav-sub,.nav-right .ui-btn{display:none}
  .nav-toggle{display:flex}
  .nav-wrap{height:56px;gap:12px}
  .site-header{position:sticky}
  .hero{padding:48px 0 40px}
  .hero::before{display:none}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-lead{font-size:16px}
  .hero-visual{order:2}
  .hero-frame img{max-height:260px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .value-grid{grid-template-columns:1fr;gap:32px}
  .spec-grid{grid-template-columns:1fr;gap:16px}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .review-card:nth-child(2),.review-card:nth-child(5){margin-top:0}
  .download-block{grid-template-columns:1fr;padding:26px 22px;gap:20px}
  .download-actions{justify-content:flex-start}
  .news-grid{grid-template-columns:1fr}
  .faq-cols{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .sticky-dl{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1300;
    height:64px;padding:0 18px;align-items:center;justify-content:space-between;gap:12px;
    background:rgba(255,255,255,.98);border-top:1px solid var(--c-line);box-shadow:var(--sh-2);
  }
  .sticky-dl .ver{font-size:12px;color:var(--c-muted);font-family:var(--font-mono);line-height:1.4}
  .sticky-dl .ver b{display:block;font-size:14px;color:var(--c-ink);font-family:var(--font-base)}
  body{padding-bottom:64px}
}
@media (max-width:575px){
  :root{--gutter:18px}
  .hero-actions .ui-btn{width:100%}
  .hero-trust{gap:10px;font-size:12px}
  .review-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .download-actions{flex-direction:column;align-items:stretch}
  .download-actions .ui-btn{width:100%}
  .news-row{grid-template-columns:1fr;gap:8px}
  .news-row-time{justify-self:start}
  .cta-inner{padding:36px 0}
  .cta-inner .ui-btn{width:100%}
}

/* roulang page: article */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF2FA;
  --c-primary:#2456D6;
  --c-primary-deep:#17389B;
  --c-primary-soft:#E4EBFF;
  --c-accent:#FF7A3C;
  --c-accent-soft:#FFEDE3;
  --c-ink:#101B33;
  --c-text:#33415C;
  --c-muted:#6B7A94;
  --c-line:#E3E9F4;
  --c-line-strong:#CFDCF5;
  --c-success:#12A594;
  --c-warn:#E8A317;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-xl:26px;
  --sh-1:0 1px 2px rgba(16,27,51,.05);
  --sh-2:0 8px 24px -12px rgba(16,27,51,.18);
  --sh-3:0 24px 48px -24px rgba(23,56,155,.28);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --bs-primary:#2456D6;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:#33415C;
  --bs-border-color:#E3E9F4;
  --bs-border-radius:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{color:var(--c-ink);margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 20px;}
a{color:var(--c-primary);text-decoration:none;transition:color .16s ease;}
a:hover{color:var(--c-primary-deep);}
img{max-width:100%;display:block;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(36,86,214,.18);outline-offset:2px;}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:all .16s ease;white-space:nowrap;
}
.btn-x.btn-primary-x{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn-x.btn-primary-x:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-x.btn-primary-x:active{transform:translateY(0);box-shadow:inset 0 1px 2px rgba(16,27,51,.2);}
.btn-x.btn-outline-x{background:#fff;border-color:var(--c-line);color:var(--c-ink);}
.btn-x.btn-outline-x:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-x.btn-ghost-x{background:transparent;color:var(--c-primary);}
.btn-x.btn-ghost-x:hover{background:var(--c-primary-soft);}
.btn-x.btn-sm-x{height:38px;padding:0 16px;font-size:14px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:900;
  background:#fff;border-bottom:1px solid var(--c-line);
  transition:box-shadow .16s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:24px;height:24px;border-radius:7px;flex:0 0 24px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;left:7px;top:7px;width:10px;height:10px;
  border-radius:3px;background:#fff;opacity:.92;
}
.logo-text{display:inline-flex;align-items:baseline;gap:4px;white-space:nowrap;}
.logo-main{font-size:16px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em;}
.logo-sub{font-size:13px;font-weight:500;color:var(--c-muted);}
.nav-main{display:flex;align-items:center;gap:26px;margin:0;}
.nav-main a{
  position:relative;font-size:15px;color:var(--c-ink);padding:6px 0;line-height:1.4;
}
.nav-main a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;transition:transform .16s ease;
}
.nav-main a:hover{color:var(--c-primary);}
.nav-main a:hover::after{transform:scaleX(1);}
.nav-main a.is-active{color:var(--c-primary);font-weight:600;}
.nav-main a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search-box{position:relative;display:flex;align-items:center;}
.search-box input{
  width:220px;height:38px;border-radius:var(--r-md);
  border:1px solid var(--c-line);background:#fff;
  padding:0 46px 0 34px;font-size:14px;color:var(--c-ink);
  transition:border-color .16s ease,box-shadow .16s ease;
}
.search-box input::placeholder{color:var(--c-muted);}
.search-box input:focus{
  outline:none;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(36,86,214,.15);
}
.search-box .s-icon{
  position:absolute;left:11px;width:16px;height:16px;color:var(--c-muted);pointer-events:none;
}
.search-box kbd{
  position:absolute;right:9px;height:20px;min-width:20px;padding:0 5px;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:11px;color:var(--c-muted);
  background:var(--c-surface-2);border-radius:var(--r-sm);border:1px solid var(--c-line);
}
.link-quiet{font-size:14px;color:var(--c-muted);}
.link-quiet:hover{color:var(--c-primary);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.mobile-drawer{
  position:fixed;inset:0;z-index:950;background:#fff;
  padding:18px 20px 96px;
  transform:translateY(-104%);transition:transform .22s ease;
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:#fff;font-size:20px;line-height:1;color:var(--c-ink);cursor:pointer;
}
.drawer-search{margin-bottom:14px;}
.drawer-search input{
  width:100%;height:44px;border-radius:var(--r-md);border:1px solid var(--c-line);
  padding:0 14px;font-size:15px;color:var(--c-ink);
}
.drawer-search input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(36,86,214,.15);}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  display:flex;align-items:center;height:52px;font-size:16px;color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600;}
.drawer-cta{
  position:fixed;left:0;right:0;bottom:0;padding:12px 20px 20px;
  background:#fff;border-top:1px solid var(--c-line);
}
.drawer-cta .btn-x{width:100%;height:48px;}

/* ---------- 页头区 ---------- */
.page-head{
  background:var(--c-surface-2);
  border-bottom:1px solid var(--c-line);
  padding:26px 0 40px;
}
.breadcrumb-x{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--c-muted);margin-bottom:18px;
}
.breadcrumb-x a{color:var(--c-muted);}
.breadcrumb-x a:hover{color:var(--c-primary);}
.breadcrumb-x .sep{color:#A9B6CB;}
.breadcrumb-x .current{
  color:var(--c-text);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.page-head h1{
  font-size:clamp(26px,3.4vw,40px);line-height:1.28;
  max-width:900px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  margin-top:18px;font-size:13px;color:var(--c-muted);
}
.article-meta .dot{color:#B9C4D6;}
.badge-x{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-sm);font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--c-surface-2);color:var(--c-text);border:1px solid var(--c-line);
}
.badge-x.badge-soft{background:var(--c-primary-soft);color:var(--c-primary);border-color:transparent;}
.badge-x.badge-accent{background:var(--c-accent-soft);color:#C4501A;border-color:transparent;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------- 文章主体 ---------- */
.article-section{padding:56px 0 72px;}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:32px;
  justify-content:center;
}
.article-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:28px 24px;
  max-width:820px;
  width:100%;
  margin:0 auto;
}
.article-body{font-size:16px;line-height:1.9;color:var(--c-text);}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 20px;}
.article-body h2{
  font-size:clamp(20px,2.2vw,26px);line-height:1.42;
  margin:40px 0 16px;padding-left:14px;position:relative;scroll-margin-top:90px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;
  background:var(--c-primary);border-radius:2px;
}
.article-body h3{
  font-size:20px;font-weight:600;line-height:1.45;margin:30px 0 12px;scroll-margin-top:90px;
}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;}
.article-body li{margin-bottom:8px;}
.article-body ul li::marker{color:var(--c-primary);}
.article-body ol li::marker{color:var(--c-primary);font-weight:600;}
.article-body blockquote{
  margin:24px 0;padding:18px 20px;
  background:var(--c-surface-2);border-left:3px solid var(--c-primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--c-text);font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:var(--r-md);margin:24px auto;border:1px solid var(--c-line);
  max-width:100%;height:auto;
}
.article-body figure{margin:24px 0;}
.article-body figcaption{
  text-align:center;font-size:13px;color:var(--c-muted);margin-top:10px;
}
.article-body a{
  color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;
  text-decoration-color:rgba(36,86,214,.35);
}
.article-body a:hover{color:var(--c-primary-deep);text-decoration-color:var(--c-primary-deep);}
.article-body code{
  font-family:var(--font-mono);font-size:.9em;
  background:var(--c-surface-2);border-radius:var(--r-sm);
  padding:2px 6px;color:var(--c-ink);
}
.article-body pre{
  background:var(--c-surface-2);border:1px solid var(--c-line);
  border-radius:var(--r-md);padding:16px 18px;overflow-x:auto;margin:0 0 20px;
}
.article-body pre code{background:none;padding:0;font-size:13px;line-height:1.7;}
.article-body table{
  width:100%;border-collapse:collapse;margin:0 0 24px;
  border:1px solid var(--c-line);border-radius:var(--r-lg);overflow:hidden;
  font-size:15px;
}
.article-body table caption{
  caption-side:top;text-align:left;font-size:13px;color:var(--c-muted);padding-bottom:8px;
}
.article-body table th,.article-body table td{
  padding:12px 14px;border-bottom:1px solid var(--c-line);text-align:left;vertical-align:top;
}
.article-body table th{background:var(--c-surface-2);font-weight:600;color:var(--c-ink);}
.article-body table tr:last-child td{border-bottom:none;}
.article-body table tbody tr:hover{background:#F8FAFF;}
.article-body hr{border:none;border-top:1px solid var(--c-line);margin:32px 0;}

.toc-wrap{display:none;}
.toc-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh-1);position:sticky;top:92px;
}
.toc-card h2{
  font-size:14px;font-weight:600;letter-spacing:.02em;color:var(--c-ink);
  padding-left:12px;position:relative;margin-bottom:14px;
}
.toc-card h2::before{
  content:"";position:absolute;left:0;top:.35em;bottom:.35em;width:3px;
  background:var(--c-primary);border-radius:2px;
}
.toc-card ol{list-style:none;margin:0;padding:0;font-size:14px;}
.toc-card li{margin-bottom:8px;line-height:1.55;}
.toc-card li.toc-l3{padding-left:14px;font-size:13px;}
.toc-card a{color:var(--c-text);display:block;}
.toc-card a:hover{color:var(--c-primary);}

/* ---------- 文末 ---------- */
.article-foot{
  max-width:820px;margin:24px auto 0;width:100%;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:24px;}
.tag-row .tag-label{font-size:13px;color:var(--c-muted);margin-right:2px;}
.pill{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border-radius:999px;background:#fff;border:1px solid var(--c-line);
  font-size:13px;color:var(--c-text);transition:all .16s ease;
}
.pill:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.foot-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 相关推荐 ---------- */
.related-section{padding:0 0 72px;}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;
}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;}
.sec-head .link-all{font-size:14px;font-weight:600;color:var(--c-primary);}
.sec-head .link-all:hover{color:var(--c-primary-deep);}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.post-card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
  height:100%;
}
.post-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.post-card .thumb{
  aspect-ratio:16/10;background:var(--c-surface-2);overflow:hidden;
}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;}
.post-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-card h3{font-size:17px;line-height:1.5;font-weight:600;}
.post-card p{font-size:14px;line-height:1.7;color:var(--c-muted);margin:0;}
.post-card .meta{
  margin-top:auto;display:flex;align-items:center;gap:10px;
  font-size:12px;color:var(--c-muted);
}

/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;padding:56px 20px;background:#fff;
  border:1px dashed var(--c-line);border-radius:var(--r-lg);
}
.empty-state .icon{
  width:48px;height:48px;margin:0 auto 16px;border-radius:var(--r-md);
  background:var(--c-surface-2);display:flex;align-items:center;justify-content:center;
  color:var(--c-muted);font-size:22px;font-weight:600;
}
.empty-state h2{font-size:20px;margin-bottom:8px;}
.empty-state p{font-size:14px;color:var(--c-muted);margin-bottom:20px;}

/* ---------- 结尾 CTA ---------- */
.cta-band{background:var(--c-surface-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);padding:56px 0;}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:32px;box-shadow:var(--sh-1);flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:8px;}
.cta-inner p{font-size:15px;color:var(--c-muted);margin:0;max-width:640px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-surface-2);padding:64px 0 28px;border-top:1px solid var(--c-line);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-muted);margin:16px 0 20px;max-width:340px;}
.footer-qr{
  width:88px;height:88px;border-radius:var(--r-md);border:1px dashed #C6D2E6;
  background:#fff;display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:11px;line-height:1.5;color:var(--c-muted);
}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--c-ink);
  padding-left:14px;position:relative;margin-bottom:16px;
}
.footer-col h4::before{
  content:"";position:absolute;left:0;top:.4em;bottom:.4em;width:3px;
  background:var(--c-primary);border-radius:2px;
}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--c-text);display:inline-block;transition:color .16s ease,transform .16s ease;}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--c-muted);
}
.footer-bottom .sep{color:#C0CBDD;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .search-box{display:none;}
  .toc-wrap{display:none !important;}
  .article-layout{grid-template-columns:minmax(0,1fr);}
}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,820px) 240px;}
  .article-card{margin:0;}
  .article-foot{margin-left:0;}
  .toc-wrap{display:block;}
}
@media (max-width:991.98px){
  .nav-main{display:none;}
  .link-quiet{display:none;}
  .header-actions .btn-x{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:60px;gap:16px;}
  .article-section{padding:40px 0 56px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{padding:26px;}
}
@media (max-width:767.98px){
  .container-x{padding:0 18px;}
  .page-head{padding:20px 0 30px;}
  .article-card{padding:20px 16px;border-radius:var(--r-md);}
  .article-body{font-size:15.5px;line-height:1.85;}
  .card-grid{grid-template-columns:1fr;}
  .site-footer{padding:48px 0 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-brand p{max-width:none;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn-x{width:100%;}
  .foot-actions .btn-x{flex:1 1 auto;}
}
@media (max-width:575.98px){
  .logo-main{font-size:15px;}
  .logo-sub{font-size:12px;}
  .breadcrumb-x{font-size:12px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:18px;}
}

/* roulang page: category1 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF2FA;
  --c-primary:#2456D6;
  --c-primary-deep:#17389B;
  --c-primary-soft:#E4EBFF;
  --c-accent:#FF7A3C;
  --c-accent-soft:#FFEDE3;
  --c-ink:#101B33;
  --c-text:#33415C;
  --c-muted:#6B7A94;
  --c-line:#E3E9F4;
  --c-line-strong:#CFDCF5;
  --c-success:#12A594;
  --c-warn:#E8A317;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-xl:26px;
  --sh-1:0 1px 2px rgba(16,27,51,.05);
  --sh-2:0 8px 24px -12px rgba(16,27,51,.18);
  --sh-3:0 24px 48px -24px rgba(23,56,155,.28);
  --bs-primary:#2456D6;
  --bs-body-color:#33415C;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-border-color:#E3E9F4;
  --bs-border-radius:12px;
  --bs-link-color:#2456D6;
  --bs-link-hover-color:#17389B;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--c-ink);font-weight:700;letter-spacing:-.01em;line-height:1.3;}
p{margin:0 0 14px;}
p:last-child{margin-bottom:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .16s ease-out;}
a:hover{color:var(--c-primary-deep);}
img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container-x{max-width:1200px;margin:0 auto;padding:0 24px;}
.mono{font-family:ui-monospace,"SFMono-Regular",Consolas,Menlo,monospace;font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .16s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{display:flex;align-items:center;gap:20px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  position:relative;flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;inset:7px;border-radius:2px;background:#fff;opacity:.92;
}
.logo-text{display:inline-flex;align-items:baseline;gap:4px;white-space:nowrap;}
.logo-main{font-size:17px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em;}
.logo-sub{font-size:13px;font-weight:500;color:var(--c-muted);}
.nav-main{display:flex;align-items:center;gap:2px;margin-right:auto;}
.nav-main a{
  position:relative;display:block;
  padding:0 13px;height:68px;line-height:68px;
  font-size:15px;color:var(--c-text);white-space:nowrap;
}
.nav-main a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:16px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .16s ease-out;
}
.nav-main a:hover{color:var(--c-primary);}
.nav-main a:hover::after{transform:scaleX(1);}
.nav-main a.is-active{color:var(--c-primary);font-weight:600;}
.nav-main a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:220px;height:38px;padding:0 8px 0 11px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(36,86,214,.15);}
.search-box svg{flex:0 0 auto;color:var(--c-muted);}
.search-box input{
  flex:1 1 auto;min-width:0;border:0;outline:0;background:transparent;
  font-size:14px;color:var(--c-ink);
}
.search-box input::placeholder{color:var(--c-muted);}
.search-box kbd{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  min-width:20px;height:20px;padding:0 4px;
  background:var(--c-surface-2);border-radius:var(--r-sm);
  font-family:ui-monospace,Consolas,monospace;font-size:11px;color:var(--c-muted);
}
.icon-btn{
  display:none;align-items:center;justify-content:center;
  width:38px;height:38px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:#fff;color:var(--c-text);cursor:pointer;
  transition:border-color .16s ease-out,color .16s ease-out;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);}
.link-sub{font-size:14px;color:var(--c-muted);white-space:nowrap;}
.link-sub:hover{color:var(--c-primary);}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:40px;height:40px;padding:0 9px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);cursor:pointer;
}
.nav-toggle span{display:block;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .16s ease-out,opacity .16s ease-out;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .16s ease-out,box-shadow .16s ease-out;
}
.btn-primary{
  background:var(--c-primary);border-color:var(--c-primary);color:#fff;
}
.btn-primary:hover{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:none;box-shadow:inset 0 1px 2px rgba(0,0,0,.14);}
.btn-outline{
  background:#fff;border-color:var(--c-line);color:var(--c-ink);
}
.btn-outline:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:transparent;color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-accent{background:var(--c-accent);border-color:var(--c-accent);color:#fff;}
.btn-accent:hover{background:#ef6a2b;border-color:#ef6a2b;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}

/* ---------- badges / tags ---------- */
.badge-x{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-sm);font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--c-surface-2);color:var(--c-text);
}
.badge-ver{background:var(--c-primary-soft);color:var(--c-primary);}
.badge-ok{background:rgba(18,165,148,.12);color:#0c7a6d;}
.badge-warn{background:rgba(232,163,23,.14);color:#9a6b06;}

/* ---------- page head ---------- */
.page-head{
  position:relative;
  padding:40px 0 52px;
  background-color:var(--c-surface-2);
  background-image:
    repeating-linear-gradient(90deg,rgba(36,86,214,.055) 0 1px,transparent 1px 22px);
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb .slash{color:#B8C4DA;}
.crumb .cur{color:var(--c-text);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.page-head-grid{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.page-head h1{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.2;
  max-width:760px;
  margin-bottom:16px;
}
.page-head .lead{
  font-size:16px;line-height:1.85;color:var(--c-text);
  max-width:720px;margin:0;
}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
.head-cta{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- sections ---------- */
.section{padding:80px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:36px;}
.section-head h2{font-size:clamp(23px,2.6vw,32px);margin-bottom:12px;}
.section-head p{font-size:15.5px;color:var(--c-muted);line-height:1.8;margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);margin-bottom:14px;
}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--c-primary);border-radius:2px;}

/* ---------- steps ---------- */
.steps{max-width:920px;}
.step{
  position:relative;
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:22px;
  padding-bottom:28px;
}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:27px;top:60px;bottom:2px;width:1px;
  background:var(--c-line);
}
.step:last-child::before{display:none;}
.step-num{
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line-strong);background:var(--c-surface);
  font-family:ui-monospace,Consolas,monospace;font-size:17px;font-weight:700;color:var(--c-primary);
  position:relative;z-index:1;
}
.step-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:24px 26px;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.step-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.step-card h3{font-size:19px;margin-bottom:10px;}
.step-card p{font-size:15px;line-height:1.85;color:var(--c-text);margin:0 0 12px;}
.step-card p:last-child{margin-bottom:0;}
.step-meta{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;
}
.step-note{
  margin-top:14px;padding:12px 14px;
  background:var(--c-surface-2);border-radius:var(--r-md);
  font-size:14px;line-height:1.75;color:var(--c-text);
}
.step-note .mono{font-size:13.5px;color:var(--c-ink);}

/* ---------- platform compare ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch;}
.figure-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
}
.figure-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-surface-2);}
.figure-card figcaption{padding:16px 20px;font-size:13px;color:var(--c-muted);border-top:1px solid var(--c-line);}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.card-head h3{font-size:18px;}
.dl-rows{margin:0;}
.dl-rows .row-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px dashed var(--c-line);font-size:14.5px;
}
.dl-rows .row-item:last-child{border-bottom:0;padding-bottom:0;}
.dl-rows .k{color:var(--c-muted);}
.dl-rows .v{color:var(--c-ink);font-weight:600;text-align:right;}
.dl-rows .v.mono{font-size:13.5px;}

/* ---------- check list ---------- */
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.check-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.check-item:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);}
.check-item .ic{
  width:34px;height:34px;border-radius:10px;background:var(--c-primary-soft);
  display:flex;align-items:center;justify-content:center;color:var(--c-primary);
  margin-bottom:14px;
}
.check-item h3{font-size:16px;margin-bottom:8px;}
.check-item p{font-size:14.5px;line-height:1.8;color:var(--c-text);margin:0;}
.check-item p code{font-family:ui-monospace,Consolas,monospace;font-size:13px;background:var(--c-surface-2);border-radius:var(--r-sm);padding:1px 5px;color:var(--c-ink);}

/* ---------- download band ---------- */
.dl-band{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:34px 36px;box-shadow:var(--sh-2);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.dl-band h2{font-size:clamp(21px,2.2vw,27px);margin-bottom:8px;}
.dl-band p{font-size:14.5px;color:var(--c-muted);margin:0;max-width:560px;}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;}
.dl-foot{
  margin-top:18px;font-size:13px;color:var(--c-muted);
  display:flex;gap:14px;flex-wrap:wrap;align-items:center;
}
.dl-foot .dot{color:#C3CEE2;}

/* ---------- faq ---------- */
.faq-list{max-width:900px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.faq-item[open]{border-color:var(--c-line-strong);box-shadow:var(--sh-1);background:linear-gradient(0deg,rgba(228,235,255,.35),rgba(228,235,255,.35)),#fff;}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:17px 22px;font-size:16px;font-weight:600;color:var(--c-ink);
  border-left:3px solid transparent;
  transition:border-color .16s ease-out,color .16s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";flex:0 0 auto;
  width:22px;height:22px;border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:500;color:var(--c-muted);background:var(--c-surface-2);
}
.faq-item[open] summary{border-left-color:var(--c-primary);color:var(--c-primary);}
.faq-item[open] summary::after{content:"–";color:var(--c-primary);background:var(--c-primary-soft);}
.faq-body{padding:0 22px 20px 22px;font-size:15px;line-height:1.85;color:var(--c-text);}
.faq-body p{margin:0;}

/* ---------- cta strip ---------- */
.cta-strip{
  background:var(--c-surface-2);
  border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
  padding:56px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(21px,2.4vw,29px);margin-bottom:8px;}
.cta-inner p{font-size:15px;color:var(--c-muted);margin:0;max-width:600px;}

/* ---------- footer ---------- */
.site-footer{background:var(--c-surface-2);padding:64px 0 28px;border-top:1px solid var(--c-line);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:40px;border-bottom:1px solid var(--c-line);
}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--c-text);margin:16px 0 20px;max-width:340px;}
.footer-qr{
  width:88px;height:88px;border-radius:var(--r-md);
  border:1px dashed #C3CEE2;background:var(--c-surface);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;line-height:1.6;color:var(--c-muted);
}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--c-ink);
  display:flex;align-items:center;gap:8px;margin-bottom:16px;
}
.footer-col h4::before{content:"";width:16px;height:2px;background:var(--c-primary);border-radius:2px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{font-size:14px;color:var(--c-text);display:inline-block;transition:color .16s ease-out,transform .16s ease-out;}
.footer-col ul li a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding-top:24px;font-size:13px;color:var(--c-muted);
}
.footer-bottom .sep{color:#C3CEE2;}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:68px 0 0 0;z-index:190;
  background:#fff;padding:20px 24px 0;
  display:none;flex-direction:column;
  overflow-y:auto;
  border-top:1px solid var(--c-line);
}
.mobile-drawer.is-open{display:flex;}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
  border:1px solid var(--c-line);border-radius:var(--r-md);background:#fff;margin-bottom:18px;
}
.drawer-search input{flex:1 1 auto;min-width:0;border:0;outline:0;font-size:15px;background:transparent;color:var(--c-ink);}
.drawer-nav a{
  display:block;height:52px;line-height:52px;
  font-size:16px;color:var(--c-text);border-bottom:1px solid var(--c-line);
}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600;}
.drawer-cta{margin:22px 0 24px;width:100%;height:48px;}
body.no-scroll{overflow:hidden;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .search-box{display:none;}
  .icon-btn{display:inline-flex;}
}
@media (max-width:991px){
  .nav-main,.link-sub{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:60px;}
  .mobile-drawer{inset:60px 0 0 0;}
  .header-actions .btn-x.btn-primary{display:none;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .page-head{padding:28px 0 40px;}
  .split{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .dl-band{padding:26px 22px;}
  .btn-x{height:48px;}
  .step{grid-template-columns:44px minmax(0,1fr);gap:16px;}
  .step-num{width:44px;height:44px;font-size:15px;}
  .step::before{left:21px;top:50px;}
}
@media (max-width:575px){
  .container-x{padding:0 18px;}
  .logo-main{font-size:16px;}
  .logo-sub{font-size:12px;}
  .page-head h1{font-size:clamp(24px,6.4vw,30px);}
  .page-head .lead{font-size:15px;}
  .head-cta{width:100%;}
  .head-cta .btn-x{flex:1 1 auto;}
  .check-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .dl-actions{width:100%;}
  .dl-actions .btn-x{flex:1 1 100%;}
  .cta-inner .btn-x{width:100%;}
  .step-card{padding:20px 18px;}
  .faq-item summary{padding:15px 16px;font-size:15px;}
  .faq-body{padding:0 16px 18px 16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category2 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF2FA;
  --c-primary:#2456D6;
  --c-primary-deep:#17389B;
  --c-primary-soft:#E4EBFF;
  --c-accent:#FF7A3C;
  --c-accent-soft:#FFEDE3;
  --c-ink:#101B33;
  --c-text:#33415C;
  --c-muted:#6B7A94;
  --c-line:#E3E9F4;
  --c-line-strong:#CFDCF5;
  --c-success:#12A594;
  --c-warn:#E8A317;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-xl:26px;
  --sh-1:0 1px 2px rgba(16,27,51,.05);
  --sh-2:0 8px 24px -12px rgba(16,27,51,.18);
  --sh-3:0 24px 48px -24px rgba(23,56,155,.28);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"Inter",SFMono-Regular,Menlo,Consolas,monospace;

  --bs-primary:#2456D6;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:#33415C;
  --bs-border-radius:12px;
  --bs-border-color:#E3E9F4;
  --bs-link-color:#2456D6;
  --bs-link-hover-color:#17389B;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:var(--c-primary);text-decoration:none;transition:color .16s ease-out;}
a:hover{color:var(--c-primary-deep);}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(36,86,214,.28);outline-offset:2px;}
.container-x{max-width:1200px;margin:0 auto;padding:0 24px;}

/* ======= header ======= */
.site-header{
  position:sticky;top:0;z-index:900;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .16s ease-out,background .16s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(255,255,255,.96);}
.header-inner{display:flex;align-items:center;gap:26px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-ink);}
.logo:hover{color:var(--c-ink);}
.logo-mark{
  width:24px;height:24px;border-radius:7px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-primary-deep) 100%);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:6px;border:2px solid #fff;border-radius:3px;
  border-right-color:transparent;border-bottom-color:transparent;
}
.logo-text{display:flex;align-items:baseline;gap:6px;white-space:nowrap;}
.logo-main{font-size:18px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em;}
.logo-sub{font-size:13px;font-weight:500;color:var(--c-muted);}
.nav-main{display:flex;align-items:center;gap:4px;}
.nav-main a{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;
  font-size:15px;color:var(--c-text);border-radius:var(--r-sm);transition:color .16s ease-out;
}
.nav-main a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .16s ease-out;border-radius:2px;
}
.nav-main a:hover{color:var(--c-primary);}
.nav-main a:hover::after,.nav-main a.is-active::after{transform:scaleX(1);}
.nav-main a.is-active{color:var(--c-primary);font-weight:600;}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:14px;}
.search-box{
  position:relative;display:flex;align-items:center;width:220px;height:38px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:0 8px 0 32px;transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(36,86,214,.15);}
.search-box svg{position:absolute;left:10px;width:16px;height:16px;stroke:var(--c-muted);fill:none;stroke-width:1.8;}
.search-box input{
  border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--c-text);
}
.search-box input::placeholder{color:var(--c-muted);}
.kbd{
  flex:0 0 auto;height:20px;min-width:20px;padding:0 5px;display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--c-muted);background:var(--c-surface-2);border-radius:var(--r-sm);
  font-family:var(--font-mono);
}
.link-quiet{font-size:14px;color:var(--c-muted);}
.link-quiet:hover{color:var(--c-primary);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);background:var(--c-surface);
  border-radius:var(--r-md);cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);position:relative;border-radius:2px;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-drawer{
  display:none;position:fixed;inset:0;z-index:950;background:var(--c-surface);
  padding:18px;overflow-y:auto;
}
.mobile-drawer.is-open{display:block;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);background:var(--c-surface);
  border-radius:var(--r-md);font-size:20px;line-height:1;color:var(--c-ink);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin:8px 0 16px;}
.drawer-nav a{
  display:flex;align-items:center;height:52px;font-size:16px;color:var(--c-text);
  border-bottom:1px solid var(--c-line);
}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600;}
.drawer-search{
  display:flex;align-items:center;height:44px;border:1px solid var(--c-line);
  border-radius:var(--r-md);padding:0 12px;background:var(--c-surface-2);margin-bottom:16px;
}
.drawer-search input{border:0;background:transparent;outline:0;width:100%;font-size:15px;color:var(--c-text);}

/* ======= buttons ======= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-md);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .16s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.btn-primary:hover{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:none;box-shadow:inset 0 1px 3px rgba(0,0,0,.16);}
.btn-outline{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line);}
.btn-outline:hover{color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:transparent;}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.btn-accent{background:var(--c-accent);color:#fff;border-color:var(--c-accent);}
.btn-accent:hover{background:#ef6a2b;border-color:#ef6a2b;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-block{width:100%;}

/* ======= badges ======= */
.badge-soft,.badge-ver,.badge-state{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-sm);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge-soft{background:var(--c-surface-2);color:var(--c-text);}
.badge-ver{background:var(--c-primary-soft);color:var(--c-primary-deep);font-family:var(--font-mono);}
.badge-state{background:rgba(18,165,148,.12);color:var(--c-success);}

/* ======= page head ======= */
.page-head{
  position:relative;overflow:hidden;
  background:var(--c-surface-2);
  border-bottom:1px solid var(--c-line);
  padding:44px 0 52px;
}
.page-head__pattern{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center right;
  opacity:.16;pointer-events:none;
}
.page-head__pattern::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(238,242,250,.96) 0%,rgba(238,242,250,.82) 48%,rgba(238,242,250,.42) 100%);
}
.page-head .container-x{position:relative;z-index:2;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb .slash{color:#A9B6CC;}
.page-head__grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:44px;align-items:center;}
.page-head h1{font-size:clamp(28px,3.6vw,42px);line-height:1.2;margin-bottom:16px;}
.page-head__lead{font-size:16px;line-height:1.85;color:var(--c-text);max-width:560px;}
.page-head__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.page-head__media{
  border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-3);background:var(--c-surface-2);aspect-ratio:16/10;
}
.page-head__media img{width:100%;height:100%;object-fit:cover;border-radius:0;}

/* ======= section base ======= */
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section-head{margin-bottom:34px;max-width:760px;}
.section-head h2{font-size:clamp(23px,2.6vw,32px);margin-bottom:12px;}
.section-head p{font-size:15px;line-height:1.8;color:var(--c-muted);}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}

/* ======= timeline ======= */
.timeline{
  list-style:none;position:relative;padding:0 0 0 30px;margin:0;
}
.timeline::before{
  content:"";position:absolute;left:7px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,var(--c-primary) 0%,var(--c-line) 100%);border-radius:2px;
}
.tl-item{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:22px 24px;margin-bottom:18px;
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.tl-item:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateX(2px);}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:26px;width:14px;height:14px;border-radius:50%;
  background:var(--c-surface);border:3px solid var(--c-primary);
  box-shadow:0 0 0 4px rgba(228,235,255,.9);
}
.tl-item:first-child::before{border-color:var(--c-accent);box-shadow:0 0 0 4px rgba(255,237,227,.95);}
.tl-head{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:10px;}
.ver{
  font-family:var(--font-mono);font-size:14px;font-weight:600;color:var(--c-primary-deep);
  background:var(--c-primary-soft);border-radius:var(--r-sm);padding:2px 9px;
}
.tl-date{font-family:var(--font-mono);font-size:13px;color:var(--c-muted);}
.tl-item h3{font-size:18px;margin-bottom:8px;font-weight:600;}
.tl-item p{font-size:15px;line-height:1.8;color:var(--c-text);}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

/* ======= side card ======= */
.side-card{
  position:sticky;top:88px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:24px;
}
.side-card h3{font-size:17px;margin-bottom:6px;}
.side-card .side-sub{font-size:13px;color:var(--c-muted);margin-bottom:16px;}
.spec-list{margin:0 0 20px;}
.spec-list > div{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px dashed var(--c-line);
}
.spec-list > div:last-child{border-bottom:0;}
.spec-list dt{font-size:14px;color:var(--c-muted);font-weight:400;margin:0;}
.spec-list dd{margin:0;font-size:14px;color:var(--c-ink);font-weight:600;text-align:right;}
.mono{font-family:var(--font-mono);}
.side-note{font-size:13px;line-height:1.7;color:var(--c-muted);margin-top:12px;}

/* ======= feature offset grid ======= */
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;}
.f-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:26px;
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.f-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.f-card:nth-child(1){grid-column:span 7;}
.f-card:nth-child(2){grid-column:span 5;}
.f-card:nth-child(3){grid-column:span 5;}
.f-card:nth-child(4){grid-column:span 7;}
.f-icon{
  width:40px;height:40px;border-radius:var(--r-md);background:var(--c-primary-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.f-icon svg{width:20px;height:20px;stroke:var(--c-primary-deep);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
.f-card h3{font-size:18px;margin-bottom:8px;font-weight:600;}
.f-card p{font-size:15px;line-height:1.8;color:var(--c-text);}
.f-meta{margin-top:14px;font-size:13px;color:var(--c-muted);font-family:var(--font-mono);}

/* ======= scenario ======= */
.scene-wrap{
  display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:36px;align-items:center;
}
.scene-media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-2);aspect-ratio:4/3;background:var(--c-surface-2);
}
.scene-media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.scene-list{list-style:none;}
.scene-list li{
  display:flex;gap:16px;padding:18px 16px;border-bottom:1px dashed var(--c-line);
  border-radius:var(--r-md);transition:background .16s ease-out;
}
.scene-list li:last-child{border-bottom:0;}
.scene-list li:hover{background:var(--c-surface);box-shadow:var(--sh-1);}
.scene-num{
  flex:0 0 auto;width:32px;height:32px;border-radius:50%;border:1px solid var(--c-primary);
  color:var(--c-primary);font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);background:var(--c-surface);
}
.scene-list h3{font-size:17px;margin-bottom:6px;font-weight:600;}
.scene-list p{font-size:15px;line-height:1.78;color:var(--c-text);}

/* ======= platform cards ======= */
.plat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.plat-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:24px;transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.plat-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);}
.plat-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.plat-head h3{font-size:17px;font-weight:600;}
.plat-row{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 0;border-bottom:1px dashed var(--c-line);font-size:14px;
}
.plat-row:last-of-type{border-bottom:0;}
.plat-row span:first-child{color:var(--c-muted);}
.plat-row span:last-child{color:var(--c-ink);font-weight:600;text-align:right;}
.tick{color:var(--c-success);font-weight:700;margin-left:6px;}

/* ======= steps ======= */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;counter-reset:step;}
.step-card{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:26px 24px 24px;
}
.step-card::before{
  counter-increment:step;content:"0" counter(step);
  position:absolute;top:-14px;left:24px;height:28px;padding:0 10px;border-radius:var(--r-sm);
  background:var(--c-primary);color:#fff;font-family:var(--font-mono);font-size:13px;font-weight:600;
  display:flex;align-items:center;
}
.step-card h3{font-size:17px;margin:10px 0 8px;font-weight:600;}
.step-card p{font-size:15px;line-height:1.78;color:var(--c-text);}

/* ======= faq ======= */
.faq-list{max-width:880px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:16px 20px;font-size:16px;font-weight:600;color:var(--c-ink);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";width:9px;height:9px;flex:0 0 auto;
  border-right:2px solid var(--c-muted);border-bottom:2px solid var(--c-muted);
  transform:rotate(45deg);transition:transform .18s ease-out;margin-right:4px;
}
.faq-item[open]{border-color:var(--c-line-strong);box-shadow:var(--sh-2),inset 3px 0 0 var(--c-primary);}
.faq-item[open] summary{color:var(--c-primary-deep);}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--c-primary);}
.faq-item p{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--c-text);}

/* ======= cta ======= */
.cta-band{
  background:var(--c-surface-2);border:1px solid var(--c-line);border-radius:var(--r-xl);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:10px;}
.cta-band p{font-size:15px;color:var(--c-muted);line-height:1.8;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ======= footer ======= */
.site-footer{background:var(--c-surface-2);border-top:1px solid var(--c-line);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-muted);margin:14px 0 18px;max-width:300px;}
.footer-qr{
  width:88px;height:88px;border-radius:var(--r-md);border:1px dashed #C3D0E6;
  background:var(--c-surface);display:flex;align-items:center;justify-content:center;
  font-size:12px;line-height:1.5;color:var(--c-muted);text-align:center;
}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:16px;
  padding-left:16px;position:relative;
}
.footer-col h4::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:10px;height:2px;border-radius:2px;background:var(--c-primary);
}
.footer-col ul{list-style:none;}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  font-size:14px;color:var(--c-text);display:inline-block;
  transition:color .16s ease-out,transform .16s ease-out;
}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--c-muted);
}
.footer-bottom .sep{color:#C3D0E6;}

/* ======= responsive ======= */
@media (max-width:1199.98px){
  .search-box{display:none;}
  .nav-main a{padding:0 9px;font-size:14px;}
  .page-head__grid{grid-template-columns:1fr;gap:30px;}
  .page-head__media{max-width:520px;aspect-ratio:16/9;}
}
@media (max-width:991.98px){
  .nav-main{display:none;}
  .link-quiet{display:none;}
  .nav-toggle{display:flex;}
  .header-inner{height:56px;gap:14px;}
  .section{padding:56px 0;}
  .page-head{padding:32px 0 40px;}
  .feature-grid{grid-template-columns:1fr;}
  .f-card:nth-child(n){grid-column:span 12;}
  .scene-wrap{grid-template-columns:1fr;gap:26px;}
  .plat-grid{grid-template-columns:1fr;gap:16px;}
  .steps{grid-template-columns:1fr;gap:26px;}
  .side-card{position:static;top:auto;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 26px;}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (max-width:575.98px){
  .container-x{padding:0 18px;}
  body{font-size:15px;}
  .logo-sub{font-size:12px;}
  .logo-main{font-size:16px;}
  .btn{height:48px;width:100%;}
  .page-head__actions{flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;}
  .tl-item{padding:18px;}
  .timeline{padding-left:24px;}
  .tl-item::before{left:-25px;width:12px;height:12px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category3 */
/* ============ 1. 变量与 reset ============ */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF2FA;
  --c-primary:#2456D6;
  --c-primary-deep:#17389B;
  --c-primary-soft:#E4EBFF;
  --c-accent:#FF7A3C;
  --c-accent-soft:#FFEDE3;
  --c-ink:#101B33;
  --c-text:#33415C;
  --c-muted:#6B7A94;
  --c-line:#E3E9F4;
  --c-success:#12A594;
  --c-warn:#E8A317;

  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-xl:26px;

  --sh-1:0 1px 2px rgba(16,27,51,.05);
  --sh-2:0 8px 24px -12px rgba(16,27,51,.18);
  --sh-3:0 24px 48px -24px rgba(23,56,155,.28);

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --bs-primary:#2456D6;
  --bs-primary-rgb:36,86,214;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --bs-body-color:#33415C;
  --bs-body-bg:#F5F7FB;
  --bs-border-color:#E3E9F4;
  --bs-border-radius:12px;
  --bs-link-color:#2456D6;
  --bs-link-hover-color:#17389B;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color .16s ease,background-color .16s ease,border-color .16s ease;}
button{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,h5{margin:0;color:var(--c-ink);letter-spacing:-.01em;font-weight:700;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(36,86,214,.2);outline-offset:2px;border-radius:var(--r-sm);}

/* ============ 2. 基础排版与容器 ============ */
.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
.section-head{margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,3vw,34px);}
.section-head p{margin-top:12px;font-size:15px;color:var(--c-muted);max-width:720px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--c-primary);border-radius:2px;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ============ 3. 组件 ============ */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease,transform .16s ease,box-shadow .16s ease;
  white-space:nowrap;
}
.btn-x:hover{transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-x:active{transform:none;box-shadow:inset 0 1px 2px rgba(16,27,51,.14);}
.btn-primary-x{background:var(--c-primary);color:#fff;}
.btn-primary-x:hover{background:var(--c-primary-deep);color:#fff;}
.btn-outline-x{background:var(--c-surface);border-color:var(--c-line);color:var(--c-ink);}
.btn-outline-x:hover{border-color:var(--c-primary);color:var(--c-primary);}
.btn-ghost-x{background:transparent;color:var(--c-primary);}
.btn-ghost-x:hover{background:var(--c-primary-soft);color:var(--c-primary);box-shadow:none;}
.btn-accent-x{background:var(--c-accent);color:#fff;}
.btn-accent-x:hover{background:#EF6A2C;color:#fff;}

.badge-x{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-sm);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--c-surface-2);color:var(--c-text);
}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.badge-accent{background:var(--c-accent-soft);color:#C2491A;}
.badge-ok{background:rgba(18,165,148,.12);color:#0C7A6D;}

.card-x{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease;
}
.card-x:hover{border-color:#CFDCF5;box-shadow:var(--sh-2);transform:translateY(-2px);}

/* ============ 4. 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .16s ease,background-color .16s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(255,255,255,.96);}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:68px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  white-space:nowrap;flex:0 0 auto;
}
.logo-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  position:relative;flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;
  border:2px solid rgba(255,255,255,.92);
  border-right-color:transparent;border-bottom-color:transparent;
  transform:rotate(45deg);
}
.logo-text{display:inline-flex;align-items:baseline;gap:5px;}
.logo-main{font-size:17px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em;}
.logo-sub{font-size:13px;color:var(--c-muted);font-weight:500;}

.nav-main{display:flex;align-items:center;gap:22px;flex:1 1 auto;}
.nav-main a{
  position:relative;
  font-size:15px;color:var(--c-text);
  padding:6px 0;
  white-space:nowrap;
}
.nav-main a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:center;
  transition:transform .16s ease;
}
.nav-main a:hover{color:var(--c-primary);}
.nav-main a:hover::after{transform:scaleX(1);}
.nav-main a.is-active{color:var(--c-primary);font-weight:600;}
.nav-main a.is-active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:220px;height:38px;padding:0 10px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  transition:border-color .16s ease,box-shadow .16s ease;
}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(36,86,214,.15);}
.search-box svg{flex:0 0 auto;color:var(--c-muted);}
.search-box input{
  flex:1 1 auto;min-width:0;
  border:0;background:transparent;outline:none;
  font-size:14px;color:var(--c-text);
}
.search-box input::placeholder{color:var(--c-muted);}
.search-box kbd{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:12px;color:var(--c-muted);
  background:var(--c-surface-2);
  border-radius:var(--r-sm);padding:1px 6px;line-height:18px;
}
.link-sub{font-size:14px;color:var(--c-muted);white-space:nowrap;}
.link-sub:hover{color:var(--c-primary);}
.nav-toggle{
  display:none;
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:var(--c-surface);color:var(--c-ink);
  align-items:center;justify-content:center;cursor:pointer;
}
.search-icon-btn{
  display:none;
  width:38px;height:38px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:var(--c-surface);color:var(--c-muted);
  align-items:center;justify-content:center;cursor:pointer;
}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:1300;
  display:flex;flex-direction:column;
  background:var(--c-surface);
  padding:16px 18px 18px;
  overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s ease;
}
body.drawer-open{overflow:hidden;}
body.drawer-open .drawer{opacity:1;visibility:visible;transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:44px;margin-bottom:14px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-md);
  background:var(--c-surface);color:var(--c-ink);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.drawer .search-box{width:100%;height:42px;}
.drawer-nav{display:flex;flex-direction:column;margin-top:12px;}
.drawer-nav a{
  display:flex;align-items:center;
  height:52px;font-size:16px;color:var(--c-text);
  border-bottom:1px solid var(--c-line);
}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600;}
.drawer-cta{margin-top:auto;width:100%;height:48px;}

/* ============ 5. 页头区 ============ */
.faq-hero{
  position:relative;
  background:var(--c-surface-2);
  border-bottom:1px solid var(--c-line);
  padding:60px 0 64px;
  overflow:hidden;
}
.faq-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.10;
}
.faq-hero::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(36,86,214,.16) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.5;
  mask-image:linear-gradient(115deg,transparent 42%,#000 100%);
  -webkit-mask-image:linear-gradient(115deg,transparent 42%,#000 100%);
}
.faq-hero .container-x{position:relative;z-index:1;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px;flex-wrap:wrap;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);}
.crumb .slash{opacity:.6;}
.crumb .current{color:var(--c-text);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.faq-hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.2;
  font-weight:700;
  max-width:760px;
}
.faq-hero h1 .h1-sub{display:block;font-size:clamp(18px,2.2vw,24px);color:var(--c-primary-deep);font-weight:600;margin-top:14px;letter-spacing:0;}
.lede{margin-top:20px;font-size:16px;line-height:1.85;color:var(--c-text);max-width:660px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:22px;font-size:13px;color:var(--c-muted);
}
.hero-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--c-line);}

.hero-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
  overflow:hidden;
}
.hero-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  background:var(--c-surface-2);
}
.hero-card-body{padding:20px 22px 22px;}
.hero-card-body h2{font-size:16px;font-weight:600;margin-top:12px;}
.hero-card-body p{margin-top:8px;font-size:14px;color:var(--c-muted);line-height:1.75;}
.mini-list{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.mini-list li{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--c-text);
}
.mini-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--c-primary);flex:0 0 auto;
}

/* ============ 6. 锚点胶囊导航 ============ */
.anchor-bar{
  position:sticky;top:68px;z-index:900;
  background:rgba(245,247,251,.96);
  border-bottom:1px solid var(--c-line);
  padding:14px 0;
}
.anchor-list{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;}
.anchor-list::-webkit-scrollbar{display:none;}
.anchor-pill{
  flex:0 0 auto;
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 16px;
  border-radius:var(--r-xl);
  border:1px solid var(--c-line);
  background:var(--c-surface);
  color:var(--c-text);
  font-size:14px;font-weight:500;
  cursor:pointer;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.anchor-pill:hover{border-color:var(--c-primary);color:var(--c-primary);}
.anchor-pill.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.anchor-pill .count{
  font-family:var(--font-mono);font-size:12px;
  opacity:.75;
}

/* ============ 7. 自查板块 ============ */
.precheck{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.precheck-figure{
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--c-surface-2);
  box-shadow:var(--sh-1);
}
.precheck-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.precheck-list{display:flex;flex-direction:column;}
.precheck-item{
  display:grid;grid-template-columns:32px 1fr;gap:16px;
  padding:20px 0;
  border-bottom:1px dashed var(--c-line);
}
.precheck-item:first-child{padding-top:0;}
.precheck-item:last-child{border-bottom:0;padding-bottom:0;}
.precheck-num{
  width:32px;height:32px;border-radius:50%;
  border:1px solid var(--c-primary);
  color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  background:var(--c-surface);
}
.precheck-item h3{font-size:17px;font-weight:600;}
.precheck-item p{margin-top:6px;font-size:15px;color:var(--c-text);line-height:1.8;}
.precheck-item .param{
  margin-top:8px;font-size:13px;color:var(--c-muted);font-family:var(--font-mono);
}

/* ============ 8. FAQ 手风琴 ============ */
.faq-block{padding:64px 0 0;}
.faq-group{margin-bottom:32px;}
.faq-group-head{
  display:flex;align-items:center;gap:14px;
  margin-bottom:18px;
}
.faq-group-head .group-num{
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--c-line);
  background:var(--c-surface);
  color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:14px;font-weight:600;
  flex:0 0 auto;
}
.faq-group-head h2{font-size:clamp(20px,2.4vw,26px);}
.faq-group-head .group-note{margin-left:auto;font-size:13px;color:var(--c-muted);white-space:nowrap;}

.faq-panel{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:6px 24px;
  scroll-margin-top:150px;
}
.faq-item{
  border-bottom:1px solid var(--c-line);
  border-radius:var(--r-md);
  padding:0 12px;
  transition:background-color .16s ease,box-shadow .16s ease;
}
.faq-item:last-child{border-bottom:0;}
.faq-item.is-open{background:rgba(228,235,255,.45);box-shadow:inset 3px 0 0 var(--c-primary);}
.faq-q{
  width:100%;
  display:flex;align-items:flex-start;gap:14px;
  padding:18px 0;
  background:none;border:0;
  text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.65;
  cursor:pointer;
}
.faq-q:hover{color:var(--c-primary);}
.faq-item.is-open .faq-q{color:var(--c-primary-deep);}
.faq-q .q-index{
  font-family:var(--font-mono);font-size:13px;font-weight:500;
  color:var(--c-muted);flex:0 0 auto;padding-top:2px;
}
.faq-q .q-text{flex:1 1 auto;min-width:0;}
.faq-q .q-icon{
  position:relative;width:20px;height:20px;flex:0 0 auto;margin-top:2px;
  border-radius:50%;
  background:var(--c-surface-2);
  transition:background-color .16s ease,transform .18s ease;
}
.faq-q .q-icon::before,
.faq-q .q-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--c-text);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform .18s ease,background-color .16s ease;
}
.faq-q .q-icon::before{width:10px;height:1.5px;}
.faq-q .q-icon::after{width:1.5px;height:10px;}
.faq-item.is-open .q-icon{background:var(--c-primary);transform:rotate(180deg);}
.faq-item.is-open .q-icon::before{background:#fff;}
.faq-item.is-open .q-icon::after{transform:translate(-50%,-50%) scaleY(0);background:#fff;}

.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .18s ease;
}
.faq-a-inner{padding:0 0 20px 34px;}
.faq-a-inner p{font-size:15px;line-height:1.85;color:var(--c-text);}
.faq-a-inner p + p{margin-top:10px;}
.faq-a-inner .tip{
  margin-top:12px;
  display:flex;gap:10px;align-items:flex-start;
  background:var(--c-surface-2);
  border-left:3px solid var(--c-primary);
  border-radius:var(--r-sm);
  padding:12px 14px;
  font-size:14px;color:var(--c-text);line-height:1.75;
}
.faq-a-inner .tip .tip-label{color:var(--c-primary-deep);font-weight:600;flex:0 0 auto;}

/* ============ 9. 反馈 CTA ============ */
.feedback-cta{
  background:var(--c-surface-2);
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  padding:56px 0;
}
.feedback-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  flex-wrap:wrap;
}
.feedback-inner h2{font-size:clamp(22px,2.6vw,28px);}
.feedback-inner p{margin-top:10px;font-size:15px;color:var(--c-text);max-width:640px;line-height:1.8;}
.feedback-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 10. 相关入口 ============ */
.entry-card{
  display:flex;flex-direction:column;
  height:100%;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:26px 24px;
  transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease;
}
.entry-card:hover{border-color:#CFDCF5;box-shadow:var(--sh-2);transform:translateY(-2px);}
.entry-tag{
  display:inline-flex;align-items:center;align-self:flex-start;
  height:24px;padding:0 10px;
  border-radius:var(--r-sm);
  background:var(--c-primary-soft);
  color:var(--c-primary-deep);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  margin-bottom:14px;
}
.entry-card h3{font-size:18px;font-weight:600;}
.entry-card p{margin-top:10px;font-size:14px;color:var(--c-muted);line-height:1.8;flex:1 1 auto;}
.entry-link{
  margin-top:18px;
  font-size:14px;font-weight:600;color:var(--c-primary);
  display:inline-flex;align-items:center;gap:6px;
}
.entry-card:hover .entry-link{color:var(--c-primary-deep);}

/* ============ 11. 页脚 ============ */
.site-footer{
  background:var(--c-surface-2);
  border-top:1px solid var(--c-line);
  padding:64px 0 28px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--c-muted);line-height:1.85;max-width:320px;}
.footer-qr{
  width:88px;height:88px;margin-top:18px;
  border:1px solid var(--c-line);border-radius:var(--r-md);
  background:var(--c-surface);
  display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:12px;color:var(--c-muted);line-height:1.5;
}
.footer-col h4{
  position:relative;
  font-size:14px;font-weight:600;color:var(--c-ink);
  padding-left:16px;margin-bottom:16px;
}
.footer-col h4::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:10px;height:2px;background:var(--c-primary);border-radius:2px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--c-text);display:inline-block;transition:color .16s ease,transform .16s ease;}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--c-line);
  display:flex;align-items:center;flex-wrap:wrap;gap:8px 12px;
  font-size:13px;color:var(--c-muted);
}
.footer-bottom .sep{opacity:.5;}

/* ============ 12. 响应式 ============ */
@media (max-width:1199.98px){
  .search-box{width:180px;}
  .nav-main{gap:16px;}
}
@media (max-width:991.98px){
  .nav-main{display:none;}
  .search-box{display:none;}
  .link-sub{display:none;}
  .search-icon-btn{display:flex;}
  .nav-toggle{display:flex;}
  .header-inner{height:56px;gap:12px;}
  .logo-main{font-size:16px;}
  .site-header .btn-primary-x{height:40px;padding:0 16px;font-size:14px;}
  .anchor-bar{top:56px;}
  .section{padding:56px 0;}
  .faq-hero{padding:44px 0 48px;}
  .faq-hero h1{max-width:none;}
  .precheck{grid-template-columns:1fr;gap:28px;}
  .precheck-figure{order:-1;}
  .faq-block{padding:48px 0 0;}
  .faq-panel{padding:4px 16px;}
  .faq-group-head .group-note{display:none;}
  .faq-a-inner{padding-left:0;padding-right:4px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:575.98px){
  .container-x{padding:0 18px;}
  .faq-hero h1{font-size:28px;}
  .faq-hero h1 .h1-sub{font-size:17px;margin-top:10px;}
  .lede{font-size:15px;}
  .btn-x{height:48px;width:100%;}
  .hero-actions{gap:10px;}
  .hero-actions .btn-x{width:100%;}
  .feedback-actions{width:100%;}
  .feedback-actions .btn-x{width:100%;}
  .faq-q{font-size:15px;gap:10px;padding:16px 0;}
  .faq-q .q-index{font-size:12px;}
  .faq-group-head .group-num{width:32px;height:32px;font-size:13px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{font-size:12px;}
  .anchor-pill{height:36px;padding:0 14px;font-size:13px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category4 */
:root{
  --c-bg:#F5F7FB;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF2FA;
  --c-primary:#2456D6;
  --c-primary-deep:#17389B;
  --c-primary-soft:#E4EBFF;
  --c-accent:#FF7A3C;
  --c-accent-soft:#FFEDE3;
  --c-ink:#101B33;
  --c-text:#33415C;
  --c-muted:#6B7A94;
  --c-line:#E3E9F4;
  --c-line-strong:#CFDCF5;
  --c-success:#12A594;
  --c-warn:#E8A317;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-xl:26px;
  --sh-1:0 1px 2px rgba(16,27,51,.05);
  --sh-2:0 8px 24px -12px rgba(16,27,51,.18);
  --sh-3:0 24px 48px -24px rgba(23,56,155,.28);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .16s ease-out,background-color .16s ease-out,border-color .16s ease-out;}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:3px solid rgba(36,86,214,.18);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .16s ease-out,background-color .16s ease-out;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);background:rgba(255,255,255,.94);}
.header-inner{display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:24px;height:24px;border-radius:7px;
  background:
    linear-gradient(135deg,var(--c-primary) 0 52%,transparent 52%),
    linear-gradient(315deg,var(--c-primary-deep) 0 52%,transparent 52%),
    var(--c-primary-soft);
  box-shadow:inset 0 0 0 1px rgba(36,86,214,.22);
  flex:0 0 auto;
}
.logo-text{display:inline-flex;align-items:baseline;gap:5px;white-space:nowrap;}
.logo-main{font-size:19px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em;}
.logo-sub{font-size:13px;color:var(--c-muted);font-weight:500;}
.nav-main{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-main a{
  position:relative;
  display:inline-flex;align-items:center;
  height:40px;padding:0 12px;
  font-size:15px;color:var(--c-text);font-weight:500;
  white-space:nowrap;
}
.nav-main a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .16s ease-out;
}
.nav-main a:hover{color:var(--c-primary);}
.nav-main a:hover::after,.nav-main a.is-active::after{transform:scaleX(1);}
.nav-main a.is-active{color:var(--c-primary);font-weight:600;}
.header-tools{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search-box{
  position:relative;display:flex;align-items:center;
  width:220px;height:38px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  padding:0 8px 0 10px;
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(36,86,214,.15);}
.search-box svg{flex:0 0 auto;color:var(--c-muted);}
.search-box input{
  flex:1 1 auto;min-width:0;height:100%;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--c-ink);padding:0 6px;
}
.search-box input::placeholder{color:var(--c-muted);}
.search-box kbd{
  flex:0 0 auto;font-family:var(--font-mono);font-size:12px;color:var(--c-muted);
  background:var(--c-surface-2);border-radius:var(--r-sm);padding:1px 6px;line-height:1.5;
}
.link-sub{font-size:14px;color:var(--c-muted);white-space:nowrap;}
.link-sub:hover{color:var(--c-primary);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;
  font-size:15px;font-weight:600;line-height:1;
  border-radius:var(--r-md);border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .16s ease-out,box-shadow .16s ease-out;
}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.btn-primary:hover{background:var(--c-primary-deep);border-color:var(--c-primary-deep);transform:translateY(-1px);box-shadow:var(--sh-2);color:#fff;}
.btn-primary:active{transform:none;box-shadow:inset 0 1px 2px rgba(16,27,51,.18);}
.btn-outline{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line);}
.btn-outline:hover{color:var(--c-primary);border-color:var(--c-primary);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:transparent;}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-md);}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink);
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}
.mobile-drawer{display:none;}

/* ---------- Page head ---------- */
.page-head{
  position:relative;
  background:
    repeating-linear-gradient(135deg,rgba(36,86,214,.055) 0 1px,transparent 1px 13px),
    var(--c-surface-2);
  border-bottom:1px solid var(--c-line);
  padding:44px 0 40px;
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;right:-90px;top:-70px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(36,86,214,.12),rgba(36,86,214,0) 68%);
  pointer-events:none;
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:16px;flex-wrap:wrap;}
.crumb .slash{color:#C6D2E6;}
.crumb a:hover{color:var(--c-primary);}
.crumb .now{color:var(--c-text);max-width:60%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.page-head h1{
  font-size:clamp(26px,3.6vw,40px);line-height:1.24;font-weight:700;
  max-width:900px;position:relative;z-index:1;
}
.page-head .lead{
  margin-top:14px;max-width:760px;font-size:15px;line-height:1.8;color:var(--c-text);
  position:relative;z-index:1;
}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;position:relative;z-index:1;}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;position:relative;z-index:1;}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  border-radius:var(--r-sm);background:var(--c-surface);color:var(--c-text);
  border:1px solid var(--c-line);
}
.tag-primary{background:var(--c-primary-soft);color:var(--c-primary-deep);border-color:transparent;}
.tag-success{background:rgba(18,165,148,.1);color:#0E7F72;border-color:transparent;}

/* ---------- Sections ---------- */
.section{padding:72px 0;}
.section-tight{padding:56px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3;}
.section-head .sub{margin-top:8px;font-size:14px;color:var(--c-muted);max-width:640px;}
.section-head .more{font-size:14px;font-weight:600;color:var(--c-primary);white-space:nowrap;}
.section-head .more:hover{color:var(--c-primary-deep);}

/* ---------- Filter chips ---------- */
.filter-bar{
  display:flex;align-items:center;gap:16px;
  padding:18px 0 0;
}
.chips{
  display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;
  scrollbar-width:thin;
}
.chips::-webkit-scrollbar{height:6px;}
.chips::-webkit-scrollbar-thumb{background:#D6E0F2;border-radius:99px;}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 15px;
  font-size:14px;font-weight:500;color:var(--c-text);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:99px;
  white-space:nowrap;cursor:pointer;
  transition:all .16s ease-out;
}
.chip:hover{border-color:var(--c-line-strong);color:var(--c-primary);}
.chip.is-on{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}

/* ---------- Stats ---------- */
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px;}
.stat{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:18px 20px;box-shadow:var(--sh-1);
}
.stat .num{font-family:var(--font-mono);font-size:24px;font-weight:700;color:var(--c-primary-deep);line-height:1.2;}
.stat .lbl{font-size:13px;color:var(--c-muted);margin-top:4px;}

/* ---------- Post grid ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.post-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.post-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.post-media{position:relative;aspect-ratio:16/10;background:var(--c-surface-2);overflow:hidden;}
.post-media img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease-out;}
.post-card:hover .post-media img{transform:scale(1.02);}
.post-media .ver{
  position:absolute;left:12px;top:12px;
  display:inline-flex;align-items:center;height:24px;padding:0 9px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  background:rgba(255,255,255,.94);color:var(--c-primary-deep);
  border-radius:var(--r-sm);border:1px solid var(--c-line);
}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto;}
.post-cat{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  background:var(--c-surface-2);color:var(--c-text);border-radius:var(--r-sm);
  align-self:flex-start;
}
.post-title{
  margin-top:12px;font-size:17px;line-height:1.5;font-weight:600;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover .post-title{color:var(--c-primary);}
.post-excerpt{
  margin-top:10px;font-size:14px;line-height:1.75;color:var(--c-muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:16px;padding-top:14px;border-top:1px dashed var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-muted);margin-top:auto;
}
.post-meta .date{font-family:var(--font-mono);}
.post-meta .read{color:var(--c-primary);font-weight:600;}
.post-card:hover .post-meta .read{color:var(--c-primary-deep);}

/* ---------- Update note / empty state ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;min-height:180px;padding:32px 24px;
  background:var(--c-surface);border:1px dashed var(--c-line-strong);border-radius:var(--r-lg);
}
.empty-state .ico{
  width:44px;height:44px;border-radius:var(--r-md);
  background:var(--c-primary-soft);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.empty-state .fact{font-size:15px;font-weight:600;color:var(--c-ink);}
.empty-state .next{margin-top:6px;font-size:13px;color:var(--c-muted);}
.load-more{display:flex;justify-content:center;margin-top:30px;}

/* ---------- Feature band ---------- */
.feature-band{display:grid;grid-template-columns:1.6fr 1fr;gap:22px;}
.feature-main{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.feature-main:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);}
.feature-main .post-media{aspect-ratio:16/9;}
.feature-main .post-body{padding:24px 26px 26px;}
.feature-main .post-title{font-size:21px;-webkit-line-clamp:3;}
.feature-main .post-excerpt{-webkit-line-clamp:3;font-size:15px;}
.feature-side{display:flex;flex-direction:column;gap:16px;}
.mini-post{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:16px;box-shadow:var(--sh-1);flex:1 1 auto;
  transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.mini-post:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.mini-post .thumb{
  flex:0 0 92px;width:92px;aspect-ratio:4/3;border-radius:var(--r-md);overflow:hidden;background:var(--c-surface-2);
}
.mini-post .thumb img{width:100%;height:100%;object-fit:cover;}
.mini-post .ct{font-size:12px;font-weight:600;color:var(--c-primary-deep);}
.mini-post h3{margin-top:6px;font-size:15px;line-height:1.55;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.mini-post:hover h3{color:var(--c-primary);}
.mini-post .dt{margin-top:8px;font-size:12px;color:var(--c-muted);font-family:var(--font-mono);}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;
}
.faq-item[open]{border-color:var(--c-line-strong);box-shadow:var(--sh-2);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 48px 18px 20px;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.55;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:20px;top:50%;width:10px;height:10px;
  border-right:2px solid var(--c-muted);border-bottom:2px solid var(--c-muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .18s ease-out,border-color .18s ease-out;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--c-primary);}
.faq-item[open] summary{color:var(--c-primary-deep);}
.faq-item .ans{
  padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--c-text);
  border-left:3px solid var(--c-primary);margin-left:20px;padding-left:16px;margin-right:20px;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--c-surface-2);
  border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
  padding:48px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(20px,2.4vw,28px);line-height:1.35;}
.cta-inner p{margin-top:8px;font-size:14px;color:var(--c-muted);max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-surface-2);border-top:1px solid var(--c-line);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .logo{margin-bottom:14px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-muted);max-width:320px;}
.footer-qr{
  margin-top:18px;width:88px;height:88px;border-radius:var(--r-md);
  background:var(--c-surface);border:1px dashed var(--c-line-strong);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;line-height:1.5;color:var(--c-muted);
}
.footer-col h4{
  position:relative;font-size:14px;font-weight:600;color:var(--c-ink);
  padding-left:16px;margin-bottom:16px;
}
.footer-col h4::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:10px;height:2px;background:var(--c-primary);border-radius:2px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--c-text);display:inline-block;transition:color .16s ease-out,transform .16s ease-out;}
.footer-col ul a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--c-muted);
}
.footer-bottom .sep{color:#C6D2E6;}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .search-box{width:180px;}
  .link-sub{display:none;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .feature-band{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-col:last-child{grid-column:auto;}
}
@media (max-width:991.98px){
  .nav-main{display:none;}
  .search-box{display:none;}
  .header-inner{height:56px;gap:14px;}
  .nav-toggle{display:inline-flex;}
  .logo-main{font-size:17px;}
  .logo-sub{font-size:12px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .page-head{padding:32px 0 30px;}
  .stat-row{grid-template-columns:repeat(3,1fr);gap:12px;}
  .faq-wrap{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  body.drawer-open{overflow:hidden;}
  body.drawer-open .mobile-drawer{
    display:block;position:fixed;left:0;right:0;top:56px;bottom:0;z-index:70;
    background:var(--c-surface);padding:18px 18px 96px;overflow-y:auto;
    border-top:1px solid var(--c-line);
  }
  .mobile-drawer .search-box{display:flex;width:100%;margin-bottom:14px;}
  .mobile-drawer nav a{
    display:flex;align-items:center;height:52px;padding:0 8px;
    font-size:16px;font-weight:500;color:var(--c-text);
    border-bottom:1px solid var(--c-line);
  }
  .mobile-drawer nav a.is-active{color:var(--c-primary);font-weight:600;}
  .mobile-drawer .drawer-cta{
    position:fixed;left:0;right:0;bottom:0;padding:14px 18px;
    background:var(--c-surface);border-top:1px solid var(--c-line);
  }
  .mobile-drawer .drawer-cta .btn{width:100%;height:48px;}
}
@media (max-width:767.98px){
  .container-x{padding:0 18px;}
  .card-grid{grid-template-columns:1fr;gap:18px;}
  .stat-row{grid-template-columns:1fr;gap:10px;}
  .stat{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;}
  .stat .num{font-size:20px;}
  .stat .lbl{margin-top:0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{gap:6px;}
  .mini-post .thumb{flex-basis:80px;width:80px;}
  .post-title{font-size:16px;}
  .btn{height:44px;}
}
@media (max-width:519.98px){
  .page-head h1{font-size:24px;}
  .head-actions .btn{width:100%;}
  .crumb .now{max-width:52%;}
  .feature-main .post-title{font-size:18px;}
}
@media (hover:none){
  .post-card:hover,.mini-post:hover{transform:none;}
}