*{box-sizing:border-box}html,body{margin:0;overflow-x:hidden}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:#3E4859;background:#fff;line-height:1.75}body.locked{overflow:hidden}a{text-decoration:none;color:inherit}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}.shell{width:min(1280px,calc(100% - 40px));margin:auto}.narrow{width:min(920px,calc(100% - 40px));margin:auto}.skip{position:fixed;top:-70px;left:15px;z-index:3000;background:#1478F2;color:#fff;padding:10px 15px;border-radius:10px}.skip:focus{top:10px}.site-header{position:sticky;top:0;z-index:1200;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(30,50,70,.08);backdrop-filter:blur(12px)}.desktop-nav{height:74px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:9px;min-width:235px}.brand img{max-width:132px;max-height:38px}.brand strong{font-size:24px;color:#1478F2}.brand span,.tag{font-size:12px;color:#075DC9;background:#EDF5FF;border-radius:999px;padding:4px 9px;white-space:nowrap}.main-nav{display:flex;gap:3px;justify-content:center;flex:1;white-space:nowrap}.main-nav a,.nav-actions a,.nav-actions button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 10px;border:0;border-radius:11px;background:transparent;font-weight:700}.main-nav a:hover,.main-nav a.is-current,.nav-actions a:hover,.nav-actions button:hover{color:#1478F2;background:#EDF5FF}.nav-actions{display:flex;gap:3px}.mobile-nav{display:none}.page-head{padding:52px 0 30px;background:linear-gradient(180deg,#F7FAFF,#fff)}.kicker{display:inline-flex;align-items:center;gap:7px;color:#1478F2;font-weight:800;font-size:13px}.kicker:before{content:"";width:24px;height:3px;border-radius:9px;background:#1478F2}.page-head h1{font-size:clamp(36px,5vw,60px);line-height:1.1;color:#172033;margin:10px 0}.page-head p{max-width:900px;font-size:17px;color:#667284}.section{padding:56px 0}.soft{background:#F7FAFF}.blue{background:#EDF5FF}.section-title{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section-title h2{font-size:clamp(28px,3vw,40px);line-height:1.2;color:#172033;margin:4px 0}.section-title p{max-width:600px;color:#6F7A89}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card,.tile,.risk,.story-lead{background:#fff;border:1px solid rgba(30,50,70,.08);border-radius:18px;padding:24px;box-shadow:0 14px 38px rgba(21,67,118,.08)}.card h3,.tile h3,.risk h2{color:#172033;margin:0 0 8px}.text-link{color:#1478F2;font-weight:800}.text-link:after{content:" →"}.btn{display:inline-flex;align-items:center;min-height:48px;padding:0 18px;border-radius:14px;background:linear-gradient(135deg,#3A96FF,#1478F2 55%,#0863D3);color:#fff;font-weight:800}.rows .row{display:grid;grid-template-columns:150px 1fr auto;gap:22px;padding:24px 0;border-top:1px solid rgba(30,50,70,.08)}.rows h2,.prose h2,.story-list h3{margin:0 0 8px;color:#172033}.eyebrow{color:#1478F2;font-weight:800;font-size:13px}.magazine{columns:3 280px;column-gap:16px}.magazine .tile{break-inside:avoid;margin-bottom:16px}.tag-wall{display:flex;flex-wrap:wrap;gap:15px}.tag-wall .tile{flex:1 1 230px;min-height:190px}.tag-wall .tile:nth-child(4n+1){flex-basis:320px;background:#EDF5FF}.qa details{padding:18px 0;border-top:1px solid rgba(30,50,70,.08)}.qa summary{cursor:pointer;color:#172033;font-size:19px;font-weight:800}.qa p{color:#667284}.story-list article{padding:22px 0;border-top:1px solid rgba(30,50,70,.08)}.wall{columns:3 280px;column-gap:16px}.wall .tile{break-inside:avoid;margin-bottom:16px}.topic-index article{display:grid;grid-template-columns:.75fr 1.25fr;gap:24px;padding:26px 0;border-top:1px solid rgba(30,50,70,.08)}.topic-index h2{margin:0;color:#172033}.guide article{display:grid;grid-template-columns:60px 1fr;gap:18px;padding:24px 0;border-top:1px solid rgba(30,50,70,.08)}.guide article>span{font-size:24px;color:#D9EAFE;font-weight:900}.guide h2{margin:0;color:#172033}.principles,.risk-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.principle{padding:24px;border-radius:16px;background:#F7FAFF;border-left:4px solid #1478F2}.principle h2{color:#172033;margin:0}.notice article,.prose{padding:24px 0;border-bottom:1px solid rgba(30,50,70,.08)}.notice h2{color:#172033;margin:0}.content-grid{display:grid;grid-template-columns:1.4fr .6fr;gap:28px}.aside{position:sticky;top:95px;align-self:start;background:#F7FAFF;border-radius:18px;padding:20px}.aside a{display:block;padding:10px 0;border-top:1px solid rgba(30,50,70,.08);font-weight:700}.taxonomy{display:grid;grid-template-columns:210px 1fr;gap:26px}.taxonomy nav{position:sticky;top:95px;align-self:start}.taxonomy nav a{display:block;padding:9px 12px;border-left:2px solid #D9EAFE}.help-links{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.help-links a{padding:20px;border-radius:16px;background:#F7FAFF;font-weight:800}.hero{padding:36px 0;background:linear-gradient(180deg,#F7FAFF,#fff)}.hero-grid{display:grid;grid-template-columns:.8fr 1.35fr .8fr;gap:16px}.hero .panel{border:1px solid rgba(30,50,70,.08);border-radius:20px;padding:24px;background:#fff}.hero h1{color:#172033;font-size:clamp(34px,4vw,52px);line-height:1.08;margin:10px 0}.hero-banner{display:flex;align-items:center;justify-content:center;min-height:460px;background:#EDF5FF!important;overflow:hidden}.hero-banner img{max-height:440px;object-fit:contain}.fallback{font-size:40px;color:#1478F2;font-weight:900;text-align:center}.hero-side{display:grid;gap:10px}.hero-side a{padding:16px;background:#F7FAFF;border-radius:14px}.hero-side strong{display:block;color:#172033}.channel-strip{border-bottom:1px solid rgba(30,50,70,.08)}.channel-scroll{display:flex;gap:26px;overflow-x:auto;padding:13px 0;white-space:nowrap}.overview{display:grid;grid-template-columns:1.2fr .8fr 1fr 1.1fr;gap:14px}.overview .tile:nth-child(even){background:#EDF5FF}.topic-feature{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.topic-main{background:#075DC9;color:#EAF3FF;padding:30px;border-radius:20px}.topic-main h3{color:#fff;font-size:30px;margin:0 0 10px}.topic-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}.topic-list a{padding:16px;border:1px solid rgba(30,50,70,.08);border-radius:14px}.topic-list strong{display:block;color:#172033}.product{display:grid;grid-template-columns:1fr .8fr;gap:24px;align-items:center}.product-copy{background:#EDF5FF;padding:30px;border-radius:22px}.product-visual{min-height:420px;border-radius:26px;background:linear-gradient(160deg,#1478F2,#075DC9);display:flex;align-items:center;justify-content:center;padding:20px}.phone{width:220px;height:410px;background:#fff;border:9px solid #0B1F38;border-radius:34px;text-align:center;padding-top:80px;color:#1478F2;font-weight:900}.brand-banner{padding:50px;border-radius:25px;background:linear-gradient(135deg,#075DC9,#1478F2);color:#EAF3FF}.brand-banner h2{color:#fff;font-size:40px}.site-footer{background:#0B1F38;color:#EAF3FF;padding:52px 0 100px}.footer-brand{display:grid;grid-template-columns:auto auto 1fr;gap:18px;align-items:center;padding-bottom:25px;border-bottom:1px solid rgba(255,255,255,.12)}.footer-brand img{max-width:110px;max-height:40px}.footer-brand strong,.footer-brand small{display:block}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding:28px 0}.footer-grid h2{font-size:14px}.footer-grid a{display:block;padding:5px 0;color:#B8C9DE}.footer-note{max-width:900px;color:#AFC2D8}.mobile-bottom{display:none}.overlay{position:fixed;inset:0;z-index:1300;background:rgba(11,31,56,.42);opacity:0;visibility:hidden;pointer-events:none}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.mega,.search-panel{position:fixed;z-index:1400;left:0;right:0;top:74px;background:#fff;max-height:calc(100vh - 74px);overflow:auto;box-shadow:0 24px 60px rgba(21,67,118,.16);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-12px)}.mega.open,.search-panel.open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.panel-head{max-width:1280px;margin:auto;padding:18px 20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(30,50,70,.08)}.panel-head strong{color:#172033;font-size:22px}.panel-head button{width:44px;height:44px;border:0;border-radius:12px;background:#F5F6F8;font-size:24px}.mega-grid{max-width:1280px;margin:auto;padding:24px 20px 32px;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.mega-grid h2{font-size:14px;color:#1478F2}.mega-grid a{display:block;padding:11px 0;border-top:1px solid rgba(30,50,70,.08)}.mega-grid b,.mega-grid span{display:block}.mega-grid span{font-size:12px;color:#7A8595}.search-inner{max-width:900px;margin:auto;padding:24px 20px}.search-inner label{font-weight:800;color:#172033}.search-inner input{width:100%;height:52px;padding:0 15px;border:1px solid rgba(20,120,242,.2);border-radius:12px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0}.chips button{border:0;border-radius:999px;padding:8px 10px;background:#EDF5FF;color:#075DC9}.search-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.search-links a{padding:13px;border:1px solid rgba(30,50,70,.08);border-radius:12px;font-weight:700}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(20,120,242,.3);outline-offset:3px}
@media(max-width:1100px){.brand span{display:none}.brand{min-width:145px}.main-nav a{padding:0 7px;font-size:14px}.hero-grid{grid-template-columns:1fr 1.4fr}.hero-side{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}}
@media(max-width:820px){body{padding-bottom:62px}.desktop-nav{display:none}.mobile-nav{height:62px;display:grid;grid-template-columns:56px 1fr 56px;align-items:center;padding:0 15px}.mobile-nav button,.mobile-nav>a:last-child{height:44px;border:0;background:transparent;display:flex;align-items:center;justify-content:center;color:#1478F2}.mobile-brand{display:flex;align-items:center;justify-content:center}.mobile-brand img{max-height:34px;max-width:150px}.shell,.narrow{width:calc(100% - 30px)}.page-head{padding:34px 0 20px}.section{padding:42px 0}.section-title{display:block}.cards,.principles,.risk-grid{grid-template-columns:1fr}.rows .row{grid-template-columns:1fr;gap:6px}.magazine,.wall{columns:1}.topic-index article,.content-grid,.taxonomy,.product,.topic-feature{grid-template-columns:1fr}.taxonomy nav,.aside{position:static}.help-links{grid-template-columns:1fr 1fr}.hero-grid{grid-template-columns:1fr}.hero-banner{min-height:280px;order:2}.hero-side{grid-column:auto;grid-template-columns:1fr 1fr;order:3}.overview{grid-template-columns:1fr}.topic-list{grid-template-columns:1fr}.footer-brand{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:1100;height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid rgba(30,50,70,.08)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:12px}.mobile-bottom a.is-current{color:#1478F2;font-weight:800}.mega{top:0;bottom:0;left:auto;width:min(88vw,420px);max-height:none;transform:translateX(105%)}.mega.open{transform:none}.mega-grid{grid-template-columns:1fr}.search-panel{top:0;bottom:0;max-height:none}.search-links{grid-template-columns:1fr}.panel-head{position:sticky;top:0;background:#fff;z-index:2}}
@media(max-width:520px){.hero-side,.help-links{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.brand-banner{padding:30px}.brand-banner h2{font-size:32px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}