*{box-sizing:border-box}
:root{
  --bg:#111722;
  --panel:#18202D;
  --panel-2:#1E2736;
  --panel-3:#253044;
  --gold:#F0D89A;
  --gold-hover:#E4C77D;
  --text:#E8EDF6;
  --muted:#BAC3D2;
  --soft:#8F9AAF;
  --footer:#0B1018;
  --line:rgba(240,216,154,.14);
  --shadow:0 16px 42px rgba(0,0,0,.26);
}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;min-width:0;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
body.drawer-open{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.site-header{position:sticky;top:0;z-index:9999;width:100%;background:#111722;box-shadow:0 10px 30px rgba(0,0,0,.24)}
.header-inner{max-width:1280px;min-height:72px;margin:0 auto;padding:0 22px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:24px}
.brand-link,.mobile-brand,.drawer-brand{display:inline-flex;align-items:center;min-width:0}
.brand-logo{height:46px;width:auto;max-width:165px;object-fit:contain}
.brand-word{display:inline-flex;align-items:center;color:var(--gold);font-size:24px;font-weight:800;letter-spacing:.08em;white-space:nowrap}
.main-nav{min-width:0;display:flex;align-items:center;justify-content:center;gap:24px;white-space:nowrap}
.main-nav a{padding:8px 0;color:var(--muted);font-weight:700;font-size:15px;transition:.2s ease}
.main-nav a:hover,.main-nav a.is-current,.category-inner a:hover,.category-inner a.is-current{color:var(--gold)}
.header-actions{display:flex;gap:10px;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 17px;border-radius:999px;border:1px solid var(--line);font-weight:800;white-space:nowrap}
.btn-primary{background:var(--gold);border-color:var(--gold);color:#17120a}
.btn-primary:hover{background:var(--gold-hover);border-color:var(--gold-hover)}
.btn-quiet{background:var(--panel-2);color:var(--text)}
.btn-quiet:hover{border-color:rgba(240,216,154,.34);color:var(--gold)}
.category-strip{border-top:1px solid rgba(255,255,255,.035);background:var(--panel);overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:thin}
.category-inner{width:max-content;min-width:100%;max-width:none;margin:0 auto;padding:0 22px;display:flex;align-items:center;justify-content:flex-start;gap:22px}
.category-inner a{display:inline-flex;min-height:44px;align-items:center;color:var(--soft);font-size:13px;white-space:nowrap}
.mobile-header{display:none}
.drawer-overlay,.mobile-drawer{display:none}
.site-main{min-height:60vh}
.container{width:min(1280px,calc(100% - 44px));margin:0 auto}
.reading{width:min(860px,calc(100% - 44px));margin:0 auto}
.section{padding:88px 0}
.section.compact{padding:58px 0}
.section.alt{background:var(--panel)}
.section-header{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}
.section-header h2,.section-title{margin:0;color:var(--gold);font-size:clamp(28px,3vw,38px);line-height:1.25;letter-spacing:.02em}
.section-header p{max-width:660px;margin:0;color:var(--muted)}
.page-hero{padding:78px 0 54px;background:linear-gradient(180deg,#151c29 0%,#111722 100%)}
.page-hero .eyebrow{display:inline-flex;margin-bottom:14px;padding:5px 11px;border:1px solid var(--line);border-radius:999px;color:var(--gold);font-size:13px;letter-spacing:.06em}
.page-hero h1{margin:0 0 18px;color:var(--gold);font-size:clamp(32px,5vw,52px);line-height:1.15;letter-spacing:.01em}
.page-hero p{max-width:800px;margin:0;color:var(--muted);font-size:18px;line-height:1.85}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#111722;border:1px solid rgba(240,216,154,.10)}
.media img{position:absolute;inset:0;width:100%;height:100%;display:block;object-fit:contain;object-position:center center}
.media-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#111722,#1E2736)}
.media.hero-media{aspect-ratio:16/7;min-height:260px;max-height:380px}
.media.topic-media{aspect-ratio:16/10;min-height:150px;max-height:210px}
.media.feature-media{aspect-ratio:4/3;min-height:220px;max-height:320px}
.media.app-media{aspect-ratio:4/3;min-height:210px;max-height:300px}
.hero-slider{border-bottom:1px solid rgba(255,255,255,.03)}
.hero-track{position:relative}
.hero-slide{display:none;padding:28px 0 34px}
.hero-slide.is-active{display:block}
.hero-caption{display:flex;align-items:center;justify-content:space-between;gap:30px;margin-top:20px;padding:0 4px}
.hero-copy h1{margin:0;color:var(--gold);font-size:clamp(32px,4.5vw,52px);line-height:1.15}
.hero-copy p{margin:9px 0 0;color:var(--muted);font-size:17px}
.hero-controls{display:flex;gap:9px;justify-content:center;padding:0 0 30px}
.hero-dot{width:34px;height:6px;border:0;border-radius:999px;background:#364256}
.hero-dot.is-active{background:var(--gold)}
.guide-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:22px}
.guide-main,.guide-stack article,.surface,.article-panel,.notice-panel,.faq-item,.feedback-item{border:1px solid var(--line);background:var(--panel-2);border-radius:18px;box-shadow:var(--shadow)}
.guide-main{padding:34px;min-height:300px;display:flex;flex-direction:column;justify-content:flex-end}
.guide-stack{display:grid;gap:22px}
.guide-stack article{padding:28px}
.guide-main h3,.guide-stack h3,.surface h3,.article-panel h3,.notice-panel h3{margin:0 0 10px;color:var(--gold)}
.guide-main p,.guide-stack p,.surface p,.article-panel p,.notice-panel p{margin:0;color:var(--muted)}
.text-link{display:inline-flex;margin-top:16px;color:var(--gold);font-weight:800}
.reading-timeline{display:grid;gap:0;border-left:1px solid var(--line);margin-left:8px}
.timeline-row{position:relative;padding:16px 0 16px 26px;border-bottom:1px solid rgba(255,255,255,.05)}
.timeline-row:before{content:"";position:absolute;left:-5px;top:25px;width:9px;height:9px;border-radius:50%;background:var(--gold)}
.timeline-row strong{display:block;color:var(--text);font-size:18px}
.timeline-row span{display:block;margin-top:3px;color:var(--muted)}
.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:34px;align-items:center}
.split.reverse{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr)}
.split.reverse .split-media{order:2}
.split-copy h2{margin:0 0 16px;color:var(--gold);font-size:clamp(28px,3vw,38px)}
.split-copy p{margin:0 0 14px;color:var(--muted)}
.channel-mosaic{display:grid;grid-template-columns:1.35fr .85fr .85fr;grid-template-rows:auto auto;gap:20px}
.channel-mosaic .surface{padding:26px}
.channel-mosaic .wide{grid-row:span 2;min-height:320px;display:flex;flex-direction:column;justify-content:flex-end;background:var(--panel-3)}
.channel-mosaic .surface:nth-child(2){min-height:170px}
.channel-mosaic .surface:nth-child(3){min-height:205px}
.channel-mosaic .surface:nth-child(4){grid-column:2 / 4;min-height:150px}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.topic-card{min-width:0;border:1px solid var(--line);border-radius:16px;background:var(--panel-2);overflow:hidden}
.topic-copy{padding:18px}
.topic-copy h3{margin:0 0 6px;color:var(--gold);font-size:18px}
.topic-copy p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
.topic-copy .text-link{margin-top:10px;font-size:14px}
.service-duo{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.service-duo .surface{padding:28px}
.clean-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.clean-list .surface{padding:24px;box-shadow:none}
.feedback-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.feedback-item{padding:24px}
.feedback-item p{margin:0;color:var(--muted)}
.faq-list{display:grid;gap:14px}
.faq-item{padding:24px;box-shadow:none}
.faq-item h3{margin:0 0 9px;color:var(--gold);font-size:18px}
.faq-item p{margin:0;color:var(--muted)}
.article-shell{display:grid;gap:26px}
.article-panel{padding:30px;box-shadow:none}
.article-panel h2{margin:0 0 14px;color:var(--gold);font-size:26px}
.article-panel p+p{margin-top:12px}
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.info-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.info-grid .article-panel{height:100%}
.key-points{display:grid;gap:14px;margin:18px 0 0;padding:0;list-style:none}
.key-points li{padding:14px 16px;border-left:3px solid var(--gold);background:rgba(255,255,255,.025);color:var(--muted)}
.link-cloud{display:flex;flex-wrap:wrap;gap:10px}
.link-cloud a{display:inline-flex;padding:9px 13px;border:1px solid var(--line);border-radius:999px;color:var(--muted);background:var(--panel)}
.link-cloud a:hover{color:var(--gold);border-color:rgba(240,216,154,.36)}
.notice-panel{padding:26px;background:var(--panel-3);box-shadow:none}
.notice-panel strong{color:var(--gold)}
.narrow-copy{max-width:860px;margin:0 auto}
.inline-links{display:flex;flex-wrap:wrap;gap:18px;margin-top:20px}
.inline-links a{color:var(--gold);font-weight:700}
.app-gallery{display:grid;grid-template-columns:1.15fr .85fr;gap:20px}
.app-gallery .media:first-child{min-height:260px}
.site-footer{background:var(--footer);border-top:1px solid rgba(255,255,255,.04)}
.footer-inner{width:min(1280px,calc(100% - 44px));margin:0 auto;padding:54px 0 34px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.footer-brand p{max-width:340px;color:var(--soft);font-size:14px}
.footer-column{display:grid;align-content:start;gap:8px}
.footer-column h2{margin:0 0 6px;color:var(--gold);font-size:16px}
.footer-column a{color:var(--muted);font-size:14px}
.footer-column a:hover{color:var(--gold)}
.footer-notice{width:min(1280px,calc(100% - 44px));margin:0 auto;padding:20px 0 30px;border-top:1px solid rgba(255,255,255,.05);display:flex;justify-content:space-between;gap:28px;color:var(--soft);font-size:13px}
.footer-notice p{margin:0}
.footer-notice p:first-child{max-width:920px}
.desktop-tools{position:fixed;right:20px;bottom:24px;z-index:900;display:grid;gap:8px;padding:10px;border:1px solid var(--line);border-radius:14px;background:rgba(24,32,45,.96);box-shadow:var(--shadow)}
.desktop-tools a,.desktop-tools button{display:flex;align-items:center;justify-content:center;min-width:104px;min-height:36px;padding:0 12px;border:1px solid rgba(255,255,255,.06);border-radius:10px;background:var(--panel-3);color:var(--muted);font-size:13px}
.desktop-tools .tool-primary{background:var(--gold);color:#17120a;font-weight:800}
.desktop-tools button{width:100%}
.mobile-bottom{display:none}
@media (max-width:1100px) and (min-width:821px){
  .header-inner{padding:0 16px;gap:13px}
  .brand-logo{height:42px;max-width:130px}
  .main-nav{gap:13px}
  .main-nav a{font-size:13px}
  .header-actions{gap:7px}
  .btn{padding:0 12px}
  .category-inner{gap:17px;padding:0 16px}
  .container,.footer-inner,.footer-notice{width:min(1280px,calc(100% - 32px))}
  .topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .channel-mosaic{grid-template-columns:1.2fr .9fr}
  .channel-mosaic .wide{grid-row:span 2}
  .channel-mosaic .surface:nth-child(4){grid-column:1 / 3}
}
@media (max-width:1023px){
  .desktop-tools{display:none}
}
@media (max-width:820px){
  .desktop-header{display:none}
  .mobile-header{display:grid;grid-template-columns:92px minmax(0,1fr) 108px;align-items:center;gap:8px;min-height:64px;padding:0 14px;background:var(--panel)}
  .mobile-brand{justify-content:center}
  .mobile-header .brand-logo{height:42px;max-width:145px}
  .menu-button{justify-self:start;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--panel-2);color:var(--text);font-size:22px}
  .mobile-register{justify-self:end;min-height:38px;padding:0 12px;font-size:13px}
  .drawer-overlay{display:block;position:fixed;inset:0;z-index:10000;background:rgba(0,0,0,.56);opacity:0;pointer-events:none;transition:opacity .25s ease}
  .drawer-overlay.is-open{opacity:1;pointer-events:auto}
  .mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;z-index:10001;width:min(86vw,330px);background:#18202D;transform:translateX(-102%);transition:transform .25s ease;box-shadow:20px 0 45px rgba(0,0,0,.35)}
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-head{min-height:68px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.06)}
  .drawer-head .brand-logo{height:42px;max-width:145px}
  .drawer-close{width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:var(--panel-2);color:var(--text);font-size:27px;line-height:1}
  .drawer-scroll{height:calc(100vh - 68px);overflow-y:auto;padding:14px 14px 92px}
  .drawer-group{padding:8px 0 12px}
  .drawer-group h2{margin:0 0 7px;color:var(--gold);font-size:13px;letter-spacing:.08em}
  .drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:7px}
  .drawer-links a{padding:9px 10px;border-radius:9px;background:var(--panel-2);color:var(--muted);font-size:13px}
  .container,.reading,.footer-inner,.footer-notice{width:min(100% - 28px,1280px)}
  .section{padding:58px 0}
  .section.compact{padding:44px 0}
  .page-hero{padding:48px 0 36px}
  .page-hero p{font-size:16px}
  .section-header{display:block}
  .section-header p{margin-top:10px}
  .media.hero-media{aspect-ratio:16/8;min-height:220px;max-height:320px}
  .guide-grid,.split,.split.reverse,.service-duo,.info-grid,.info-grid.three,.app-gallery{grid-template-columns:1fr}
  .split.reverse .split-media{order:0}
  .channel-mosaic{grid-template-columns:1fr 1fr;grid-template-rows:auto}
  .channel-mosaic .wide{grid-column:1 / 3;grid-row:auto;min-height:220px}
  .channel-mosaic .surface:nth-child(4){grid-column:1 / 3}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .clean-list{grid-template-columns:1fr}
  .feedback-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / 3}
  .footer-notice{display:block;padding-bottom:98px}
  .footer-notice p+p{margin-top:10px}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9500;display:grid;grid-template-columns:repeat(5,1fr);padding:8px max(8px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:rgba(11,16,24,.98);border-top:1px solid var(--line)}
  .mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:42px;color:var(--muted);font-size:13px}
  .site-main{padding-bottom:64px}
}
@media (max-width:520px){
  .mobile-header{grid-template-columns:68px minmax(0,1fr) 102px;padding:0 10px}
  .mobile-header .brand-logo{height:40px;max-width:128px}
  .mobile-register{padding:0 10px;font-size:12px}
  .container,.reading,.footer-inner,.footer-notice{width:min(100% - 24px,1280px)}
  .hero-slide{padding-top:18px}
  .hero-caption{display:block}
  .hero-caption .btn{margin-top:18px}
  .media.hero-media{aspect-ratio:16/10;min-height:190px;max-height:280px}
  .media.topic-media{min-height:150px;max-height:195px}
  .media.feature-media{min-height:220px;max-height:300px}
  .media.app-media{min-height:210px;max-height:280px}
  .guide-main{min-height:240px;padding:26px}
  .guide-stack article,.surface,.article-panel,.notice-panel,.faq-item,.feedback-item{border-radius:14px}
  .topic-grid{gap:12px}
  .topic-copy{padding:14px}
  .topic-copy p{font-size:13px}
  .channel-mosaic{grid-template-columns:1fr}
  .channel-mosaic .wide,.channel-mosaic .surface:nth-child(4){grid-column:auto}
  .footer-inner{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
}