*{box-sizing:border-box}
:root{--bg:#111722;--panel:#18202D;--panel2:#1E2736;--panel3:#253044;--gold:#F0D89A;--gold2:#E4C77D;--text:#E8EDF6;--muted:#BAC3D2;--soft:#8F9AAF;--footer:#0B1018;--line:rgba(240,216,154,.14);--shadow:0 16px 42px rgba(0,0,0,.26);--max:1280px}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:inherit;text-decoration:none}a:hover{color:var(--gold2)}
img{max-width:100%;height:auto}.site-main{min-height:60vh}.container{width:min(calc(100% - 44px),var(--max));margin:0 auto}.article{width:min(calc(100% - 44px),860px);margin:0 auto}.section{padding:88px 0}.section-tight{padding:58px 0}.section-alt{background:linear-gradient(180deg,rgba(30,39,54,.72),rgba(17,23,34,.5))}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;color:var(--gold);font-size:13px;letter-spacing:.08em;background:rgba(240,216,154,.04)}
h1,h2,h3{margin:0 0 18px;color:var(--gold);line-height:1.22}h1{font-size:clamp(44px,4.4vw,54px);letter-spacing:-.02em}h2{font-size:clamp(28px,3vw,38px)}h3{font-size:21px}.lead{font-size:18px;color:var(--muted);max-width:760px;margin:0}.copy{color:var(--muted)}.copy p{margin:0 0 18px}.small{font-size:14px;color:var(--soft)}
.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-logo{display:inline-flex;align-items:center;min-width:0}.brand-logo img{height:46px;width:auto;max-width:165px;object-fit:contain;display:block}.logo-fallback{font-size:24px;font-weight:700;color:var(--gold);white-space:nowrap}.primary-nav{display:flex;align-items:center;justify-content:center;gap:clamp(14px,2vw,30px);min-width:0}.primary-nav a{white-space:nowrap;color:var(--muted);font-size:15px}.primary-nav a:hover,.primary-nav a.is-current{color:var(--gold)}.account-actions{display:flex;gap:10px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 17px;border-radius:10px;border:1px solid var(--line);font-weight:700;white-space:nowrap}.btn-ghost{background:var(--panel2)}.btn-gold{background:var(--gold);color:#15181e;border-color:var(--gold)}.btn-gold:hover{color:#111;background:var(--gold2)}
.category-nav{border-top:1px solid rgba(255,255,255,.04);background:#151c28}.category-track{max-width:1280px;margin:0 auto;padding:0 22px;display:flex;gap:22px;overflow-x:auto;scrollbar-width:thin}.category-track a{padding:11px 0;white-space:nowrap;color:var(--soft);font-size:13px}.category-track a:hover{color:var(--gold)}
.mobile-header,.mobile-drawer,.drawer-overlay,.mobile-bottom-nav{display:none}
.page-hero{padding:74px 0 54px;background:radial-gradient(circle at 15% 0,rgba(240,216,154,.08),transparent 34%)}.page-hero .lead{margin-top:18px}.breadcrumb{display:flex;gap:8px;flex-wrap:wrap;color:var(--soft);font-size:14px;margin-bottom:20px}.breadcrumb a{color:var(--muted)}
.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,#18202D,#111722);border-radius:inherit}.media-main{aspect-ratio:4/3;min-height:220px;max-height:320px}.media-topic{aspect-ratio:16/10;min-height:150px;max-height:210px}.media-app{aspect-ratio:4/3;min-height:210px;max-height:300px}.media-hero{aspect-ratio:16/7;min-height:260px;max-height:380px}
.hero-wrap{padding:34px 0 70px}.hero-slider{position:relative}.hero-slide{position:relative;margin:0 auto 18px}.js .hero-slide{display:none}.js .hero-slide.is-active{display:block}.hero-copy{position:absolute;left:24px;bottom:24px;z-index:3;max-width:520px;padding:18px 20px;border-radius:14px;background:rgba(11,16,24,.84);backdrop-filter:blur(8px);border:1px solid var(--line)}.hero-copy h1{font-size:clamp(30px,3.2vw,46px);margin-bottom:8px}.hero-copy p{margin:0;color:var(--muted)}.hero-copy .btn{margin-top:14px}.slider-dots{display:flex;justify-content:center;gap:8px;margin-top:14px}.slider-dots button{width:34px;height:7px;border:0;border-radius:999px;background:#38445a;cursor:pointer}.slider-dots button.is-active{background:var(--gold)}
.guide-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:22px}.guide-main,.guide-small,.card,.panel{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px}.guide-main{padding:30px;min-height:310px;display:flex;flex-direction:column;justify-content:space-between}.guide-side{display:grid;gap:22px}.guide-small{padding:24px}.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--gold);font-weight:700}.text-link::after{content:'→'}
.timeline{display:grid;gap:0}.timeline-item{display:grid;grid-template-columns:120px 1fr;gap:28px;padding:24px 0;border-bottom:1px solid var(--line)}.timeline-item strong{color:var(--gold)}.timeline-item p{margin:0;color:var(--muted)}
.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:42px;align-items:center}.split.reverse{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr)}.split.reverse .split-media{order:2}.split.reverse .split-copy{order:1}
.channel-grid{display:grid;grid-template-columns:1.3fr .85fr .85fr;gap:20px;align-items:stretch}.channel-grid .card{padding:25px}.channel-grid .wide{grid-row:span 2;min-height:320px}.channel-grid .tall{min-height:200px}.card p,.panel p{color:var(--muted);margin:0 0 16px}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.topic-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px;min-width:0}.topic-card h3{font-size:18px;margin:13px 0 8px}.topic-card p{font-size:14px;color:var(--muted);margin:0 0 8px}.topic-card .text-link{font-size:14px}
.app-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}.app-images{display:grid;grid-template-columns:1fr .8fr;gap:14px;align-items:end}.service-pair{display:grid;grid-template-columns:1fr 1fr;gap:22px}.service-pair .panel{padding:26px}.security-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.security-item{padding:22px;border-left:3px solid var(--gold);background:var(--panel);border-radius:0 14px 14px 0}.security-item p{margin:0;color:var(--muted)}
.feedback-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.feedback{padding:22px;background:var(--panel2);border:1px solid var(--line);border-radius:14px;color:var(--muted)}
.faq-list{display:grid;gap:14px}.faq-item{padding:22px 24px;background:var(--panel);border:1px solid var(--line);border-radius:14px}.faq-item h3{font-size:18px;margin-bottom:8px}.faq-item p{margin:0;color:var(--muted)}
.notice{padding:24px 26px;border-radius:16px;background:#151d29;border:1px solid var(--line)}.notice strong{color:var(--gold)}.notice p{margin:8px 0 0;color:var(--muted)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px}.content-panel{padding:28px;background:var(--panel);border:1px solid var(--line);border-radius:18px}.content-panel ul{padding-left:20px;color:var(--muted)}.content-panel li+li{margin-top:9px}.link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.link-list a{padding:12px 14px;border-radius:10px;background:var(--panel2);border:1px solid var(--line);color:var(--muted)}.link-list a:hover{color:var(--gold);border-color:rgba(240,216,154,.28)}
.info-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}.info-strip div{padding:18px 20px;border-radius:14px;background:var(--panel2);border:1px solid var(--line)}.info-strip strong{display:block;color:var(--gold);margin-bottom:6px}.info-strip span{color:var(--muted);font-size:14px}
.feature-list{display:grid;gap:12px}.feature-row{display:grid;grid-template-columns:180px 1fr;gap:24px;padding:18px 0;border-bottom:1px solid var(--line)}.feature-row strong{color:var(--gold)}.feature-row p{margin:0;color:var(--muted)}
.asym-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}.asym-grid .content-panel:first-child{grid-row:span 2}.mini-nav{display:flex;flex-wrap:wrap;gap:10px}.mini-nav a{padding:8px 12px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);color:var(--muted);font-size:14px}
.site-footer{background:var(--footer);padding:64px 0 24px;border-top:1px solid rgba(240,216,154,.08)}.footer-inner{width:min(calc(100% - 44px),var(--max));margin:0 auto;display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:40px}.footer-inner h2{font-size:16px;margin-bottom:14px}.footer-inner>div:not(.footer-brand){display:flex;flex-direction:column;gap:8px}.footer-inner a{color:var(--muted);font-size:14px}.footer-brand p{color:var(--soft);font-size:14px;max-width:340px}.footer-bottom{width:min(calc(100% - 44px),var(--max));margin:36px auto 0;padding-top:22px;border-top:1px solid rgba(255,255,255,.06);display:flex;justify-content:space-between;gap:24px;color:var(--soft);font-size:13px}.footer-bottom p{margin:0}.footer-bottom p:first-child{max-width:800px}
.desktop-tools{position:fixed;right:20px;bottom:26px;z-index:1200;display:flex;flex-direction:column;gap:8px}.desktop-tools a,.desktop-tools button{min-width:96px;padding:9px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--muted);font:inherit;font-size:13px;cursor:pointer;text-align:center;box-shadow:0 8px 20px rgba(0,0,0,.22)}.desktop-tools .tool-primary{background:var(--gold);color:#15181e;font-weight:700}.desktop-tools button:hover,.desktop-tools a:hover{color:var(--gold)}
@media(max-width:1100px){.header-inner{gap:14px;padding:0 16px}.primary-nav{gap:13px}.primary-nav a{font-size:14px}.account-actions .btn{padding:0 13px}.topic-grid{grid-template-columns:repeat(3,1fr)}.channel-grid{grid-template-columns:1.15fr .85fr}.channel-grid .wide{grid-row:span 2}.security-list{grid-template-columns:1fr 1fr}.desktop-tools{display:none}}
@media(max-width:900px){h1{font-size:clamp(36px,6vw,44px)}.section{padding:68px 0}.guide-grid,.split,.split.reverse,.app-layout,.two-col,.asym-grid{grid-template-columns:1fr}.split.reverse .split-media,.split.reverse .split-copy{order:initial}.channel-grid{grid-template-columns:1fr 1fr}.channel-grid .wide{grid-column:span 2;grid-row:auto}.topic-grid{grid-template-columns:repeat(3,1fr)}.footer-inner{grid-template-columns:1.4fr 1fr 1fr}.footer-inner>div:last-child{grid-column:2/4}.media-hero{aspect-ratio:16/8;min-height:220px;max-height:320px}.hero-copy{max-width:440px}.desktop-header,.category-nav{display:none}.mobile-header{display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:66px;padding:0 16px}.mobile-logo{justify-content:center}.mobile-logo img{max-width:145px;height:44px}.menu-toggle{width:42px;height:42px;border:1px solid var(--line);background:var(--panel);border-radius:10px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px}.menu-toggle span{display:block;width:18px;height:2px;background:var(--gold)}.mobile-register{white-space:nowrap;padding:9px 11px;border-radius:9px;background:var(--gold);color:#111;font-size:13px;font-weight:700}.drawer-overlay{display:block;position:fixed;inset:0;z-index:10000;background:rgba(4,8,13,.64);opacity:0;visibility:hidden;transition:.2s}.drawer-overlay.is-open{opacity:1;visibility:visible}.mobile-drawer{display:flex;position:fixed;left:0;top:0;bottom:0;z-index:10001;width:min(86vw,330px);background:#18202D;transform:translateX(-101%);transition:transform .24s ease;flex-direction:column;box-shadow:18px 0 40px rgba(0,0,0,.36)}.mobile-drawer.is-open{transform:translateX(0)}.drawer-head{min-height:70px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--line)}.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:var(--panel2);color:var(--gold);font-size:25px;line-height:1}.drawer-scroll{overflow-y:auto;padding:15px 16px 28px}.drawer-group{padding:12px 0}.drawer-group h2{font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--soft);margin-bottom:8px}.drawer-group a{display:block;padding:8px 6px;color:var(--muted);border-bottom:1px solid rgba(255,255,255,.035)}.mobile-bottom-nav{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:8000;grid-template-columns:repeat(5,1fr);background:#0f1620;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom-nav a{padding:10px 4px;text-align:center;font-size:12px;color:var(--muted)}body{padding-bottom:58px}.site-footer{margin-bottom:0}.app-images{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.container,.article{width:min(calc(100% - 30px),var(--max))}.section{padding:54px 0}.section-tight{padding:44px 0}.page-hero{padding:48px 0 34px}h1{font-size:clamp(30px,9vw,36px)}h2{font-size:27px}.lead{font-size:16px}.media-hero{aspect-ratio:16/10;min-height:190px;max-height:280px}.hero-wrap{padding:18px 0 52px}.hero-copy{position:static;margin-top:12px;max-width:none;background:var(--panel);padding:18px}.hero-copy h1{font-size:30px}.slider-dots{margin-top:10px}.guide-grid,.channel-grid,.service-pair,.security-list,.feedback-grid,.info-strip{grid-template-columns:1fr}.channel-grid .wide{grid-column:auto}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-card{padding:10px}.timeline-item{grid-template-columns:1fr;gap:5px}.app-images{grid-template-columns:1fr}.footer-inner{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/3}.footer-inner>div:last-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom p+p{margin-top:10px}.feature-row{grid-template-columns:1fr;gap:6px}.link-list{grid-template-columns:1fr}.content-panel{padding:22px}.mobile-header{padding:0 10px;grid-template-columns:44px minmax(0,1fr) auto;gap:6px}.mobile-logo img{max-width:128px;height:42px}.mobile-register{padding:8px 9px;font-size:12px}.menu-toggle{width:40px;height:40px}.media-main{min-height:210px}}
@media(max-width:390px){.mobile-logo img{max-width:116px}.mobile-register{padding:7px 8px}.topic-grid{gap:9px}.topic-card h3{font-size:16px}.footer-inner{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-inner>div:last-child{grid-column:auto}}