*{box-sizing:border-box}
:root{
  --bg:#071017;--panel:#0D1820;--panel2:#10222A;--line:rgba(67,206,183,.2);
  --accent:#43CEB7;--accent2:#E9C86A;--text:#EEF7F5;--muted:#A5B9B5;--deep:#041014;
}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(circle at 82% 0,#102D31 0,transparent 28%),#071017;color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:var(--accent)}
img{max-width:100%}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:9999;background:rgba(4,16,20,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.header-inner{max-width:1180px;min-height:68px;margin:auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.site-logo{display:inline-flex;align-items:center;text-decoration:none;flex:0 0 auto}
.site-logo img{display:block;height:38px;width:auto;max-width:156px;object-fit:contain}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;min-width:112px;height:38px;border:1px solid var(--line);border-radius:9px;color:var(--accent2);font-weight:900;letter-spacing:.12em;background:#08151B}
.nav-core{display:flex;align-items:center;gap:3px}
.nav-core a{color:#DCE8E5;text-decoration:none;padding:8px 10px;border-radius:9px;font-size:15px;font-weight:700;white-space:nowrap}
.nav-core a:hover,.nav-core a.is-current{background:#153138;color:#7BE3D2}
.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:86px;height:40px;padding:0 18px;border:1px solid rgba(233,200,106,.55);border-radius:10px;background:linear-gradient(135deg,#E9C86A,#B99237);color:#08100F;text-decoration:none;font-weight:900;box-shadow:0 8px 24px rgba(185,146,55,.18)}
.header-action{flex:0 0 auto}
.menu-toggle{display:none;border:0;background:transparent;color:var(--accent2);font-weight:800;padding:8px 0}
.channel-bar{background:#09151B;border-bottom:1px solid rgba(255,255,255,.04)}
.channel-inner{max-width:1180px;margin:auto;padding:0 18px;display:flex;gap:4px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{white-space:nowrap;text-decoration:none;color:#9FB5B1;padding:10px 8px;font-size:13px}
.channel-inner a:hover{color:#7BE3D2}
#mainContent{min-height:60vh}
.shell{width:min(1180px,calc(100% - 36px));margin:auto}
.reading{width:min(820px,calc(100% - 30px));margin:auto}
.section{padding:44px 0}
.section.compact{padding:26px 0}
.page-hero{padding:52px 0 30px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:13px;letter-spacing:.18em;color:#75D9C9;text-transform:uppercase;margin-bottom:9px}
.breadcrumb{font-size:13px;color:#79918D;margin-bottom:12px}
.breadcrumb a{color:#AFC3BF;text-decoration:none}
h1,h2,h3{line-height:1.3;margin-top:0}
h1{font-size:clamp(30px,4vw,44px);margin-bottom:16px;color:#F3F7F3}
h2{font-size:26px;color:#DFF8F2;margin-bottom:14px}
h3{font-size:19px;color:#F0D890;margin-bottom:8px}
p{margin:0 0 16px}
.lead{max-width:850px;font-size:18px;color:#C8D8D5}
.muted{color:var(--muted)}
.hero-panel{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:center;padding:28px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(145deg,#0B1A21,#0A141A);box-shadow:0 18px 50px rgba(0,0,0,.24)}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.ghost-link{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border:1px solid var(--line);border-radius:10px;color:#B9D6D1;text-decoration:none;background:#0C1B22}
.media{position:relative;width:100%;overflow:hidden;border-radius:14px;background:#0C171D;border:1px solid var(--line);aspect-ratio:16/9}
.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center;display:block}
.media-placeholder{position:absolute;inset:0;display:grid;place-items:center;background:linear-gradient(135deg,#0C171D,#13252B);color:#758A86;font-size:13px}
.poster-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:14px}
.poster-grid .media{height:190px;aspect-ratio:auto}
.poster-grid .media:first-child{grid-row:span 2;height:394px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
.section-head p{max-width:640px;margin:0;color:var(--muted)}
.grid-2,.grid-3,.grid-4,.topic-grid{display:grid;gap:15px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.topic-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
.card,.text-card,.note-card,.qa-item{background:linear-gradient(180deg,#0D1A21,#0A151B);border:1px solid var(--line);border-radius:14px;padding:19px;box-shadow:0 14px 36px rgba(0,0,0,.17)}
.text-card{min-height:142px}
.text-card p{font-size:14px;color:#A9BEBA;margin:7px 0 0}
.text-card a{text-decoration:none}
.topic-grid a{display:flex;flex-direction:column;justify-content:space-between;min-height:108px;padding:16px;border:1px solid rgba(233,200,106,.2);border-radius:14px;background:#0E1B21;text-decoration:none;color:#F3E2A8}
.topic-grid a span{display:block;color:#8FA7A2;font-size:12px;margin-top:8px}
.callout{padding:20px 22px;border-left:3px solid var(--accent);border-radius:12px;background:#0B1A20;color:#BBD2CD}
.feature-row{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;align-items:center}
.feature-row.reverse{grid-template-columns:1.1fr .9fr}
.feature-media{height:235px;aspect-ratio:auto}
.card-media{height:166px;aspect-ratio:auto;margin-bottom:14px}
.badge{display:inline-flex;padding:4px 9px;border-radius:999px;background:#17343A;color:#86E4D5;font-size:12px;font-weight:800;margin-bottom:10px}
.link-list{display:flex;flex-wrap:wrap;gap:9px}
.link-list a{display:inline-flex;align-items:center;min-height:38px;padding:6px 12px;border:1px solid var(--line);border-radius:9px;background:#0A171C;color:#C7DDD8;text-decoration:none}
.link-list a:hover{border-color:#43CEB7;color:#7BE3D2}
.steps{display:grid;gap:12px;counter-reset:step}
.step{position:relative;padding:18px 18px 18px 62px;border:1px solid var(--line);border-radius:14px;background:#0C191F}
.step:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:#17343A;color:#7BE3D2;font-weight:900}
.simple-list{padding-left:1.2em;margin:0}
.simple-list li{margin:.5em 0}
.qa-list{display:grid;gap:13px}
.age-box{padding:20px;border:1px solid rgba(233,200,106,.28);border-radius:14px;background:#101916;color:#D7D3BC}
.side-float{position:fixed;right:12px;top:35%;z-index:9000;width:90px;display:grid;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#07151A;box-shadow:0 16px 36px rgba(0,0,0,.24)}
.side-float a{padding:11px 7px;text-align:center;text-decoration:none;color:#9FD8CF;font-size:13px;border-bottom:1px solid var(--line)}
.side-float a:last-child{border-bottom:0}.side-float .side-primary{background:#E9C86A;color:#0B1210;font-weight:900}
.mobile-bottom{display:none}
.mobile-drawer,.drawer-mask{display:none}
.noscript-nav{display:none}
.site-footer{margin-top:46px;background:#030A0D;border-top:1px solid rgba(67,206,183,.34)}
.footer-grid{max-width:1180px;margin:auto;padding:38px 18px;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:25px}
.footer-grid h3{font-size:16px}.footer-grid a{display:block;text-decoration:none;color:#A9BEBA;margin:5px 0}.footer-brand p{color:#78918C}
.footer-bottom{max-width:1180px;margin:auto;border-top:1px solid rgba(255,255,255,.05);padding:17px 18px 25px;color:#718581;font-size:13px}
.footer-bottom p{margin:4px 0}
@media(max-width:1320px){.side-float{display:none}}
@media(max-width:980px){
  .header-inner{min-height:62px}.menu-toggle{display:inline-block;width:68px;text-align:left;flex:0 0 68px}.nav-core,.channel-bar{display:none}.header-action{width:68px;min-width:68px;padding:0 10px}.header-inner>.site-logo{position:absolute;left:50%;transform:translateX(-50%)}.header-inner>.site-logo img{max-width:128px;height:34px}
  .hero-panel,.feature-row,.feature-row.reverse{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .poster-grid{grid-template-columns:1fr 1fr}.poster-grid .media:first-child{grid-column:1/-1;grid-row:auto;height:230px}.poster-grid .media{height:160px}
  .mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);background:#08151B;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;box-shadow:18px 0 40px rgba(0,0,0,.45)}
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.62);z-index:11000;opacity:0;pointer-events:none;transition:opacity .18s ease}
  .drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}
  .drawer-close{background:transparent;border:1px solid var(--line);color:#85DCCF;border-radius:9px;padding:6px 10px}
  .drawer-scroll{height:calc(100vh - 67px);overflow:auto;padding:10px 16px 24px}.drawer-scroll section{padding:10px 0 12px;border-bottom:1px solid var(--line)}.drawer-scroll h3{font-size:14px;color:#F0D890}.drawer-scroll a:not(.main-btn){display:block;padding:7px 0;color:#C4D8D4;text-decoration:none}.drawer-register{width:100%;margin-top:18px}
  .noscript-nav{display:flex;flex-wrap:wrap;gap:7px;padding:10px 12px;background:#0A171C;border-bottom:1px solid var(--line)}.noscript-nav a{color:#C3D9D4;text-decoration:none;padding:5px 8px;border:1px solid var(--line);border-radius:8px;font-size:13px}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9500;height:58px;background:#030B0E;border-top:1px solid #43CEB7;display:grid;grid-template-columns:repeat(4,1fr)}.mobile-bottom a{display:grid;place-items:center;text-decoration:none;color:#CBE0DC;font-size:13px}
  body{padding-bottom:58px}
}
@media(max-width:720px){
  .shell,.reading{width:min(100% - 24px,1180px)}.page-hero{padding:34px 0 22px}.section{padding:32px 0}h1{font-size:clamp(27px,8vw,34px)}h2{font-size:22px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.poster-grid{grid-template-columns:1fr}.poster-grid .media:first-child,.poster-grid .media{height:145px}.feature-media{height:205px}.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:430px){
  .header-inner{padding:0 12px}.menu-toggle{width:62px;flex-basis:62px}.header-action{width:62px;min-width:62px;padding:0 8px;height:38px}.header-inner>.site-logo img{max-width:118px}.logo-placeholder{min-width:90px}.topic-grid{gap:10px}.card,.text-card,.note-card,.qa-item{padding:16px}
}