*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#08080d;
  --bg-card:#111118;
  --bg-elevated:#18181f;
  --orange:#ff8c00;
  --orange-light:#ffb347;
  --orange-dim:rgba(255,140,0,.12);
  --gold:#c9a227;
  --text:#ececf0;
  --text-muted:#8a8a96;
  --border:rgba(255,255,255,.06);
  --radius:14px;
  --header-h:64px;
  --sticky-ads-h:0px;
  --font-display:"Songti SC","STSong","SimSun","FangSong",serif;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Segoe UI",sans-serif;
  --font-mono:"Cascadia Code","Consolas","Microsoft YaHei",monospace;
}
html{scroll-behavior:smooth;font-size:16px;-webkit-font-smoothing:antialiased}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  overflow-x:hidden;
  font-weight:400;
  letter-spacing:.02em;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--orange-light);text-decoration:none;transition:color .2s}
a:hover{color:var(--orange)}
.container{width:min(1140px,92vw);margin:0 auto}

/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--header-h);
  background:rgba(8,8,13,.88);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .3s;
}
.site-header.scrolled{box-shadow:0 4px 24px rgba(0,0,0,.4)}
.header-inner{
  height:100%;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 4vw;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);font-weight:700;font-size:1.05rem}
.brand img{width:38px;height:38px;border-radius:10px}
.brand span em{font-style:normal;color:var(--orange)}
.main-nav{display:flex;gap:28px;align-items:center}
.main-nav a{color:var(--text-muted);font-size:.92rem;font-weight:500}
.main-nav a:hover,.main-nav a.active{color:var(--orange)}
.nav-toggle{
  display:none;background:none;border:none;cursor:pointer;
  width:36px;height:36px;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:22px;height:2px;background:var(--text);
  position:absolute;left:7px;transition:.3s;
}
.nav-toggle span{top:17px}
.nav-toggle span::before{content:"";top:-7px}
.nav-toggle span::after{content:"";top:7px}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span::before{transform:rotate(45deg);top:0}
.nav-toggle.open span::after{transform:rotate(-45deg);top:0}

/* Sticky ads bar */
.ads-sticky-bar{
  position:fixed;left:0;right:0;z-index:999;
  background:rgba(8,8,13,.96);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  padding:8px 12px;
  transform:translateY(-110%);
  opacity:0;pointer-events:none;
  transition:transform .35s,opacity .35s;
}
.ads-sticky-bar.visible{transform:translateY(0);opacity:1;pointer-events:auto}
@media(min-width:768px){
  .ads-sticky-bar{top:var(--header-h)}
  body.has-sticky-ads-pc{padding-top:calc(var(--header-h) + var(--sticky-ads-h))}
}
@media(max-width:767px){
  .ads-sticky-bar{
    top:auto;bottom:0;
    border-bottom:none;border-top:1px solid var(--border);
    transform:translateY(110%);
  }
  .ads-sticky-bar.visible{transform:translateY(0)}
  body.has-sticky-ads{padding-bottom:var(--sticky-ads-h)}
}
#ads-sticky-inner{
  display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;gap:6px;
  max-width:1140px;margin:0 auto;
}
#ads-sticky-inner>div{
  display:flex;flex-direction:column;align-items:center;
  width:calc(12.5% - 6px);
}
@media(max-width:767px){
  #ads-sticky-inner>div{width:calc(25% - 6px)}
}
#ads-sticky-inner img{
  width:52px;height:52px;object-fit:cover;border-radius:14px;
  box-shadow:0 4px 14px rgba(0,0,0,.3);
}
#ads-sticky-inner .caption{
  font-size:10px;color:var(--text-muted);margin-top:3px;
  max-width:70px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* Ads zone */
#download-zone{padding:calc(var(--header-h) + 24px) 0 32px;background:var(--bg-card)}
#ads{
  display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;gap:8px;
  background:transparent;margin:0 auto 8px;max-width:640px;
}
#ads>div{display:flex;flex-direction:column;align-items:center;width:70px}
#ads img{
  width:65px;height:65px;object-fit:cover;border-radius:18px;
  box-shadow:0 6px 18px rgba(0,0,0,.25);transition:transform .18s;
}
#ads a{display:inline-block;border-radius:15px}
#ads img:hover{transform:translateY(-3px) scale(1.03)}
#ads .caption{
  height:15px;font-size:11px;color:var(--text-muted);text-align:center;
  max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:4px;
}
.ads-hint{text-align:center;font-size:.85rem;color:var(--text-muted)}

/* Hero */
.hero{
  padding:48px 0 72px;
  background:linear-gradient(165deg,var(--bg) 0%,#0e0e16 50%,var(--bg) 100%);
  position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;top:-20%;right:-10%;width:60%;height:80%;
  background:radial-gradient(ellipse,rgba(255,140,0,.08) 0%,transparent 70%);
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:7fr 3fr;gap:40px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;border-radius:999px;
  background:var(--orange-dim);border:1px solid rgba(255,140,0,.25);
  font-size:.82rem;color:var(--orange-light);margin-bottom:20px;
}
.hero-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange)}
.hero h1{
  font-family:var(--font-display);
  font-size:clamp(1.8rem,4.5vw,2.8rem);
  line-height:1.3;font-weight:700;margin-bottom:20px;
  letter-spacing:.04em;
}
.hero h1 strong{color:var(--orange)}
.hero-lead{font-size:1.05rem;color:var(--text-muted);margin-bottom:28px;max-width:540px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.hero-tags span{
  padding:6px 14px;border-radius:8px;font-size:.82rem;
  background:var(--bg-elevated);border:1px solid var(--border);color:var(--text-muted);
}
.hero-stats{display:flex;gap:32px;flex-wrap:wrap}
.hero-stat strong{display:block;font-size:1.5rem;color:var(--orange);font-family:var(--font-display)}
.hero-stat span{font-size:.82rem;color:var(--text-muted)}

/* Hero phones overlap */
.hero-phones{position:relative;height:420px;display:flex;justify-content:center;align-items:center}
.hero-phones .phone{
  position:absolute;width:155px;border-radius:22px;
  box-shadow:0 20px 50px rgba(0,0,0,.5);
  border:2px solid rgba(255,255,255,.08);
  transition:transform .4s;
}
.hero-phones .phone:nth-child(1){transform:rotate(-8deg) translateX(-60px);z-index:1}
.hero-phones .phone:nth-child(2){transform:rotate(2deg) translateY(-10px);z-index:3;width:170px}
.hero-phones .phone:nth-child(3){transform:rotate(10deg) translateX(60px);z-index:2}
.hero-phones:hover .phone:nth-child(1){transform:rotate(-10deg) translateX(-70px) translateY(-5px)}
.hero-phones:hover .phone:nth-child(2){transform:rotate(0deg) translateY(-15px)}
.hero-phones:hover .phone:nth-child(3){transform:rotate(12deg) translateX(70px) translateY(-5px)}

/* Sections */
section{padding:72px 0}
.section-label{
  font-size:.78rem;text-transform:uppercase;letter-spacing:.15em;
  color:var(--orange);margin-bottom:12px;font-weight:600;
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.5rem,3vw,2rem);
  margin-bottom:16px;line-height:1.35;
  letter-spacing:.03em;font-weight:700;
}
.section-desc{color:var(--text-muted);margin-bottom:40px;max-width:640px}

/* Ribbon stats */
.stat-ribbon{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--border);border-radius:var(--radius);overflow:hidden;
  margin-bottom:64px;
}
.stat-ribbon div{
  background:var(--bg-card);padding:28px 20px;text-align:center;
}
.stat-ribbon strong{display:block;font-size:1.6rem;color:var(--orange);font-family:var(--font-display)}
.stat-ribbon span{font-size:.85rem;color:var(--text-muted)}

/* Split content 3:7 */
.split-block{display:grid;grid-template-columns:3fr 7fr;gap:40px;align-items:start;margin-bottom:56px}
.split-block.reverse{grid-template-columns:7fr 3fr}
.split-block.reverse .split-media{order:2}
.split-block.reverse .split-text{order:1}
.split-media img{border-radius:var(--radius);box-shadow:0 12px 40px rgba(0,0,0,.35)}
.split-text h3{font-family:var(--font-display);font-size:1.25rem;margin-bottom:14px;color:var(--text);letter-spacing:.02em}
.split-text p{color:var(--text-muted);margin-bottom:12px;font-size:.95rem}
.split-text ul{margin:12px 0 0 18px;color:var(--text-muted);font-size:.93rem}
.split-text li{margin-bottom:6px}

/* Feature cards */
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 24px;
  position:relative;overflow:hidden;
}
.feature-card::after{
  content:"";position:absolute;top:0;left:0;width:3px;height:100%;
  background:linear-gradient(180deg,var(--orange),var(--gold));
}
.feature-num{font-size:.75rem;color:var(--orange);font-weight:700;margin-bottom:10px}
.feature-card h4{font-size:1.05rem;margin-bottom:10px}
.feature-card p{font-size:.88rem;color:var(--text-muted);line-height:1.65}

/* Channel grid */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.channel-item{
  background:var(--bg-elevated);border:1px solid var(--border);
  border-radius:12px;padding:22px 18px;text-align:center;
}
.channel-item .ch-icon{
  width:44px;height:44px;margin:0 auto 12px;border-radius:12px;
  background:var(--orange-dim);display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;color:var(--orange);
}
.channel-item h4{font-size:.95rem;margin-bottom:6px}
.channel-item p{font-size:.82rem;color:var(--text-muted)}

/* Timeline steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step-item{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px 20px;position:relative;
}
.step-item::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--font-display);font-size:1.8rem;color:rgba(255,140,0,.25);
  display:block;margin-bottom:10px;
}
.step-item h4{font-size:.95rem;margin-bottom:8px}
.step-item p{font-size:.85rem;color:var(--text-muted)}

/* FAQ */
.faq-list{max-width:760px}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{
  width:100%;background:none;border:none;color:var(--text);
  text-align:left;padding:20px 36px 20px 0;font-size:1rem;cursor:pointer;
  position:relative;font-family:var(--font-sans);
}
.faq-q::after{
  content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);
  font-size:1.3rem;color:var(--orange);transition:transform .25s;
}
.faq-item.open .faq-q::after{transform:translateY(-50%) rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 0 20px;color:var(--text-muted);font-size:.93rem}
.faq-item.open .faq-a{max-height:400px}

/* CTA band */
.cta-band{
  background:linear-gradient(135deg,rgba(255,140,0,.15),rgba(201,162,39,.08));
  border:1px solid rgba(255,140,0,.2);border-radius:var(--radius);
  padding:48px 40px;text-align:center;margin-top:48px;
}
.cta-band h3{font-family:var(--font-display);font-size:1.5rem;margin-bottom:12px}
.cta-band p{color:var(--text-muted);margin-bottom:24px;max-width:520px;margin-left:auto;margin-right:auto}
.btn-primary{
  display:inline-block;padding:14px 36px;border-radius:999px;
  background:linear-gradient(135deg,var(--orange),#e67e00);
  color:#fff;font-weight:600;font-size:.95rem;
  box-shadow:0 6px 24px rgba(255,140,0,.3);transition:transform .2s,box-shadow .2s;
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 10px 32px rgba(255,140,0,.4)}

/* Text-only SEO blocks */
.prose-block{margin-bottom:40px}
.prose-block h3{font-family:var(--font-display);font-size:1.15rem;margin-bottom:12px;color:var(--text);letter-spacing:.02em}
.prose-block p{color:var(--text-muted);font-size:.93rem;margin-bottom:10px}

/* Image gallery grid */
.gallery-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:48px;
}
.gallery-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:12px;overflow:hidden;transition:border-color .25s,transform .25s;
}
.gallery-card:hover{border-color:rgba(255,140,0,.3);transform:translateY(-3px)}
.gallery-card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.gallery-card figcaption{
  padding:12px 10px;font-size:.78rem;color:var(--text-muted);line-height:1.5;
  border-top:1px solid var(--border);
}
.gallery-card figcaption strong{display:block;color:var(--text);font-size:.82rem;margin-bottom:4px;font-weight:600}

/* SEO columns - pure text */
.seo-columns{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:40px}
.seo-col{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 24px;
}
.seo-col h3{font-family:var(--font-display);font-size:1.1rem;margin-bottom:14px;color:var(--orange-light);letter-spacing:.02em}
.seo-col p{color:var(--text-muted);font-size:.9rem;margin-bottom:10px;line-height:1.85}

/* Article panels - long-form text */
.article-panel{
  background:var(--bg-elevated);border-left:3px solid var(--orange);
  border-radius:0 var(--radius) var(--radius) 0;
  padding:28px 32px;margin-bottom:28px;
}
.article-panel h3{font-family:var(--font-display);font-size:1.12rem;margin-bottom:14px;letter-spacing:.02em}
.article-panel p{color:var(--text-muted);font-size:.92rem;margin-bottom:10px;line-height:1.85}
.article-panel p:last-child{margin-bottom:0}

/* Mosaic - image + text rows */
.mosaic-row{
  display:grid;grid-template-columns:3fr 7fr;gap:36px;align-items:center;
  margin-bottom:48px;padding-bottom:48px;border-bottom:1px solid var(--border);
}
.mosaic-row:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.mosaic-row:nth-child(even){grid-template-columns:7fr 3fr}
.mosaic-row:nth-child(even) .mosaic-img{order:2}
.mosaic-row:nth-child(even) .mosaic-text{order:1}
.mosaic-img img{border-radius:var(--radius);box-shadow:0 10px 36px rgba(0,0,0,.35);max-width:280px;margin:0 auto}
.mosaic-text h3{font-family:var(--font-display);font-size:1.18rem;margin-bottom:12px}
.mosaic-text p{color:var(--text-muted);font-size:.92rem;margin-bottom:10px}

/* Keyword highlight strip */
.keyword-strip{
  display:flex;flex-wrap:wrap;gap:10px;margin:32px 0 48px;
}
.keyword-strip span{
  padding:8px 18px;border-radius:8px;font-size:.84rem;
  background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted);
}

/* Breadcrumb */
.breadcrumb{padding:calc(var(--header-h) + 20px) 0 16px;font-size:.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--orange)}
.breadcrumb span{margin:0 8px;opacity:.5}

/* Subpage */
.page-hero{padding:32px 0 40px;border-bottom:1px solid var(--border);margin-bottom:40px}
.page-hero h1{font-family:var(--font-display);font-size:1.8rem;margin-bottom:10px}
.page-hero p{color:var(--text-muted);font-size:.95rem}
.page-content{max-width:800px;padding-bottom:64px}
.page-content h2{font-family:var(--font-display);font-size:1.2rem;margin:32px 0 12px;color:var(--text)}
.page-content p,.page-content li{color:var(--text-muted);font-size:.93rem;margin-bottom:10px}
.page-content ul,.page-content ol{margin:0 0 16px 24px}

/* Error pages */
.error-page{
  min-height:70vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:120px 20px 60px;
}
.error-code{font-family:var(--font-display);font-size:5rem;color:var(--orange);line-height:1}
.error-page h1{font-size:1.4rem;margin:16px 0 10px}
.error-page p{color:var(--text-muted);margin-bottom:28px;max-width:420px}

/* Footer */
.site-footer{
  background:var(--bg-card);border-top:1px solid var(--border);
  padding:48px 0 32px;margin-top:32px;
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-brand img{width:42px;height:42px;border-radius:10px;margin-bottom:14px}
.footer-brand p{font-size:.85rem;color:var(--text-muted);line-height:1.65}
.footer-col h5{font-size:.85rem;color:var(--text);margin-bottom:14px;font-weight:600}
.footer-col a{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:8px}
.footer-col a:hover{color:var(--orange)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:24px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:.8rem;color:var(--text-muted);
}

/* Responsive */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-phones{height:340px;margin-top:20px}
  .hero-phones .phone{width:130px}
  .hero-phones .phone:nth-child(2){width:145px}
  .split-block,.split-block.reverse{grid-template-columns:1fr;gap:24px}
  .split-block.reverse .split-media,.split-block.reverse .split-text{order:unset}
  .feature-row{grid-template-columns:1fr 1fr}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .stat-ribbon{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .gallery-grid{grid-template-columns:repeat(3,1fr)}
  .seo-columns{grid-template-columns:1fr}
  .mosaic-row,.mosaic-row:nth-child(even){grid-template-columns:1fr}
  .mosaic-row:nth-child(even) .mosaic-img,.mosaic-row:nth-child(even) .mosaic-text{order:unset}
}
@media(max-width:640px){
  .main-nav{
    position:fixed;top:var(--header-h);left:0;right:0;
    background:rgba(8,8,13,.98);flex-direction:column;
    padding:20px;gap:16px;border-bottom:1px solid var(--border);
    transform:translateY(-120%);opacity:0;pointer-events:none;transition:.3s;
  }
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-toggle{display:block}
  .hero-phones .phone{width:110px}
  .hero-phones .phone:nth-child(2){width:125px}
  .hero-phones .phone:nth-child(1){transform:rotate(-6deg) translateX(-45px)}
  .hero-phones .phone:nth-child(3){transform:rotate(8deg) translateX(45px)}
  .feature-row,.channel-grid,.steps{grid-template-columns:1fr}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  section{padding:52px 0}
}