*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#141B22;color:#EEF2F7;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}
img,svg,video{max-width:100%}
a{color:#F4B000}
a:hover{color:#FFC533}
button,input,textarea{font:inherit}
.site-header{position:sticky;top:0;z-index:9999;width:100%;background:rgba(20,27,34,.92);backdrop-filter:blur(10px);box-shadow:0 8px 24px rgba(0,0,0,.22)}
.header-inner{max-width:1180px;min-height:70px;margin:0 auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.site-logo{display:flex;align-items:center;min-width:150px;text-decoration:none}
.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.logo-fallback{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:138px;padding:0 14px;border:1px solid rgba(244,176,0,.32);border-radius:10px;color:#F4B000;font-weight:800;letter-spacing:.06em}
.nav-core{display:flex;align-items:center;justify-content:center;gap:2px;white-space:nowrap}
.nav-core a{color:#F4B000;padding:8px 11px;font-weight:700;text-decoration:none;white-space:nowrap}
.nav-core a.is-current,.nav-core a:hover{color:#FFC533;box-shadow:inset 0 -2px 0 #F4B000}
.main-btn{display:inline-flex;align-items:center;justify-content:center;height:42px;min-width:96px;padding:0 20px;background:#F4B000;color:#141B22;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 24px rgba(244,176,0,.18)}
.main-btn:hover{background:#FFC533;color:#141B22}
.header-main-btn{flex:0 0 auto}
.menu-button{display:none;width:42px;height:42px;padding:9px;border:0;background:#1A232D;border-radius:10px}
.menu-button span{display:block;height:2px;margin:5px 0;background:#F4B000}
.channel-strip{background:#1A232D;border-top:1px solid rgba(244,176,0,.08);border-bottom:1px solid rgba(244,176,0,.10)}
.channel-inner{max-width:1180px;margin:0 auto;padding:0 18px;display:flex;gap:4px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{flex:0 0 auto;padding:11px 10px;color:#B9C2CF;text-decoration:none;font-size:14px;white-space:nowrap}
.channel-inner a:hover,.channel-inner a.is-current{color:#F4B000}
.site-main{min-height:64vh}
.container{width:min(1180px,calc(100% - 36px));margin:0 auto}
.reading{width:min(820px,calc(100% - 36px));margin:0 auto}
.section{padding:56px 0}
.section-sm{padding:34px 0}
.section-dark{background:#10161C}
.section-card{background:#1A232D;border:1px solid rgba(244,176,0,.14);box-shadow:0 14px 36px rgba(0,0,0,.28);border-radius:16px}
h1,h2,h3{line-height:1.32;margin-top:0}
h1{font-size:clamp(28px,4vw,44px);color:#F4B000;margin-bottom:18px}
h2{font-size:clamp(22px,2.6vw,30px);color:#F4B000;margin-bottom:14px}
h3{font-size:18px;color:#EEF2F7;margin-bottom:8px}
p{margin:0 0 16px;color:#EEF2F7}
.muted{color:#B9C2CF}
.crumb{width:min(1180px,calc(100% - 36px));margin:0 auto;padding:22px 0 0;color:#8D98A7;font-size:14px}
.crumb a{color:#B9C2CF;text-decoration:none}
.intro{font-size:18px;color:#D8DEE8}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:14px;background:#1A232D;aspect-ratio:16/9}
.media > img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1A232D,#10161C);color:#8D98A7;border:1px dashed rgba(244,176,0,.18)}
.media-placeholder span{font-weight:700;letter-spacing:.08em}
.media-placeholder-silent span{display:none}
.text-link{display:inline-flex;align-items:center;gap:7px;text-decoration:none;font-weight:700}
.text-link::after{content:"→"}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.guide-card{padding:24px}
.guide-card p{color:#B9C2CF}
.mid-poster{width:min(1100px,calc(100% - 36px));margin:0 auto}
.mid-poster .media{aspect-ratio:16/3.25;min-height:180px;max-height:240px}
.split{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:28px;align-items:start}
.split.reverse>div:first-child{order:2}
.split.reverse>div:last-child{order:1}
.panel{padding:28px}
.topic-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.topic-links a,.link-grid a{display:block;padding:14px 15px;background:#222C36;border:1px solid rgba(244,176,0,.10);border-radius:12px;text-decoration:none;color:#EEF2F7}
.topic-links a:hover,.link-grid a:hover{border-color:rgba(244,176,0,.35);color:#F4B000}
.link-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.app-strip{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.9fr);gap:24px;align-items:center;padding:30px}
.app-strip .media{aspect-ratio:16/6}
.hero-slider{position:relative;width:min(1180px,calc(100% - 36px));margin:24px auto 0;border-radius:16px;background:#1A232D;overflow:hidden;box-shadow:0 14px 36px rgba(0,0,0,.28);height:360px}
.hero-track,.hero-slide{position:absolute;inset:0}
.hero-slide{opacity:0;pointer-events:none;transition:opacity .35s ease}
.hero-slide.is-active{opacity:1;pointer-events:auto}
.hero-slide .media{height:100%;aspect-ratio:auto;border-radius:0}
.hero-prev,.hero-next{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:44px;height:44px;border:1px solid rgba(244,176,0,.28);border-radius:50%;background:rgba(16,22,28,.82);color:#F4B000;font-size:28px;cursor:pointer}
.hero-prev{left:16px}.hero-next{right:16px}
.hero-dots{position:absolute;z-index:6;left:0;right:0;bottom:14px;display:flex;justify-content:center;gap:7px}
.hero-dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;background:#8D98A7;cursor:pointer}
.hero-dot.is-active{background:#F4B000;transform:scale(1.2)}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px}
.article-body{min-width:0}
.article-body ul,.article-body ol{padding-left:1.35em}
.article-body li{margin-bottom:8px}
.aside-box{position:sticky;top:112px;padding:22px}
.aside-box a{display:block;padding:8px 0;text-decoration:none;border-bottom:1px solid rgba(244,176,0,.08)}
.kicker{display:inline-block;margin-bottom:12px;color:#F4B000;font-size:14px;font-weight:700;letter-spacing:.1em}
.steps{counter-reset:step;display:grid;gap:13px}
.steps li{list-style:none;position:relative;padding:18px 18px 18px 56px;background:#1A232D;border:1px solid rgba(244,176,0,.12);border-radius:14px}
.steps li::before{counter-increment:step;content:counter(step);position:absolute;left:16px;top:16px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:#F4B000;color:#141B22;font-weight:800}
.notice-box{padding:20px 22px;background:#222C36;border-left:3px solid #F4B000;border-radius:0 12px 12px 0}
.two-questions{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:24px 0}
.two-questions article{padding:22px;background:#1A232D;border:1px solid rgba(244,176,0,.12);border-radius:14px}
.mini-toc{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0 28px}
.mini-toc a{padding:7px 12px;background:#222C36;border-radius:999px;text-decoration:none;color:#D8DEE8}
.related{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.related a{padding:14px;background:#1A232D;border-radius:12px;text-decoration:none}
.faq-list{display:grid;gap:14px}
.faq-item{padding:22px;background:#1A232D;border:1px solid rgba(244,176,0,.12);border-radius:14px}
.faq-item h2{font-size:20px}
.side-float{position:fixed;right:14px;top:34%;z-index:8000;width:92px;display:grid;background:#10161C;border:1px solid rgba(244,176,0,.18);border-radius:14px;overflow:hidden;box-shadow:0 14px 36px rgba(0,0,0,.28)}
.side-float a,.side-float button{min-height:44px;padding:10px 6px;border:0;border-bottom:1px solid rgba(244,176,0,.10);background:#10161C;color:#F4B000;text-decoration:none;text-align:center;font-size:13px;cursor:pointer}
.side-float .float-register{background:#F4B000;color:#141B22;font-weight:800}
.side-float button:last-child{border-bottom:0}
.site-footer{background:#0B1015;color:#D8DEE8;padding:48px 0 90px}
.footer-grid{width:min(1180px,calc(100% - 36px));margin:0 auto;display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:28px}
.footer-grid h2{font-size:17px;color:#F4B000}
.footer-grid a{display:block;padding:4px 0;color:#D8DEE8;text-decoration:none}
.footer-grid p{color:#B9C2CF}
.footer-logo{display:inline-flex;margin-bottom:14px;text-decoration:none}
.footer-logo img{height:38px;width:auto;object-fit:contain}
.footer-bottom{width:min(1180px,calc(100% - 36px));margin:30px auto 0;padding-top:20px;border-top:1px solid rgba(244,176,0,.10);display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.footer-bottom p{font-size:13px;color:#8D98A7;margin:0}
.mobile-bottom{display:none}

.mobile-drawer,
.drawer-mask{display:none}

.drawer-open{overflow:hidden}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:15px;border-bottom:1px solid rgba(244,176,0,.12)}
.drawer-logo{display:flex;align-items:center;text-decoration:none}
.drawer-logo img{height:36px;width:auto;object-fit:contain}
.drawer-close{width:40px;height:40px;border:0;border-radius:10px;background:#222C36;color:#F4B000;font-size:27px}
.drawer-scroll{height:calc(100vh - 72px);overflow:auto;padding:14px}
.drawer-scroll section{margin-bottom:18px}
.drawer-scroll h2{font-size:14px;color:#8D98A7;margin-bottom:7px}
.drawer-scroll a{display:block;padding:10px 8px;color:#EEF2F7;text-decoration:none;border-radius:8px}
.drawer-scroll a:hover{background:#222C36;color:#F4B000}

@media(max-width:1100px){
  .nav-core a{padding-left:7px;padding-right:7px}
  .side-float{display:none}
}
@media(max-width:980px){
  .header-inner{min-height:64px;display:grid;grid-template-columns:48px 1fr auto;gap:10px}
  .menu-button{display:block}
  .nav-core,.channel-strip{display:none}
  .site-logo{min-width:0;justify-content:center}
  .site-logo img{max-width:148px;height:36px}
  .header-main-btn{min-width:84px;height:40px;padding:0 15px}
  .guide-grid{grid-template-columns:1fr}
  .split,.article-shell,.app-strip{grid-template-columns:1fr}
  .split.reverse>div:first-child,.split.reverse>div:last-child{order:initial}
  .aside-box{position:static}
  .link-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .related{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .footer-bottom{display:block}
  .footer-bottom p+p{margin-top:8px}
  .hero-slider{height:270px}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9000;display:grid;grid-template-columns:repeat(4,1fr);background:#141B22;border-top:1px solid rgba(244,176,0,.14);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bottom a{text-align:center;text-decoration:none;color:#D8DEE8;padding:12px 4px 11px;font-size:14px}
  .site-footer{padding-bottom:110px}

  .mobile-drawer{
    display:block;
    position:fixed;
    inset:0 auto 0 0;
    width:min(84vw,320px);
    background:#1A232D;
    z-index:12000;
    transform:translateX(-105%);
    transition:transform .2s ease;
    box-shadow:18px 0 40px rgba(0,0,0,.36);
  }
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-mask{
    display:none;
    position:fixed;
    inset:0;
    background:rgba(11,16,21,.52);
    z-index:11000;
    opacity:0;
    pointer-events:none;
    transition:opacity .18s ease;
  }
  .drawer-mask.is-visible{
    display:block;
    opacity:1;
    pointer-events:auto;
  }
}
@media(max-width:720px){
  body{font-size:16px}
  .container,.reading,.crumb,.hero-slider,.mid-poster,.footer-grid,.footer-bottom{width:min(100% - 28px,1180px)}
  .section{padding:38px 0}
  .section-sm{padding:26px 0}
  .panel{padding:22px}
  .hero-slider{height:190px;margin-top:16px}
  .hero-prev,.hero-next{width:38px;height:38px;font-size:24px}
  .mid-poster .media{min-height:120px;max-height:160px}
  .topic-links{grid-template-columns:1fr}
  .link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .two-questions{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .app-strip{padding:22px}
}
@media(max-width:430px){
  .header-inner{padding:0 12px;grid-template-columns:44px minmax(0,1fr) auto}
  .menu-button{width:40px;height:40px}
  .site-logo .logo-fallback{min-width:0;padding:0 10px;font-size:15px}
  .header-main-btn{min-width:78px;padding:0 12px;font-size:14px}
  .hero-slider{height:170px}
}