*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#EAF2FB;color:#24364F;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.82;overflow-x:hidden}a{color:#137CD8;text-decoration:none}a:hover{opacity:.9}img{max-width:100%}.site-header{position:sticky;top:0;z-index:9000;width:100%;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);box-shadow:0 6px 18px rgba(19,124,216,.08)}.header-inner{max-width:1140px;min-height:66px;margin:0 auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.site-logo{display:flex;align-items:center;flex:0 0 auto}.site-logo img,.drawer-logo img,.footer-logo img{display:block;height:38px;width:auto;max-width:156px;object-fit:contain}.logo-text{font-size:21px;font-weight:800;color:#137CD8}.nav-core{display:flex;align-items:center;gap:2px}.nav-core a{color:#24364F;padding:8px 11px;font-weight:700;white-space:nowrap}.nav-core a.is-current,.nav-core a:hover{color:#137CD8;box-shadow:inset 0 -2px 0 #2FA8F7}.auth-actions{display:flex;align-items:center;gap:8px;white-space:nowrap}.auth-link,.main-btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border-radius:999px;font-weight:800;touch-action:manipulation}.auth-link{background:#fff;border:1px solid rgba(47,168,247,.28);color:#137CD8}.main-btn{border:0;background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);color:#fff;box-shadow:0 10px 22px rgba(19,124,216,.18)}.menu-btn{display:none;border:0;background:transparent;color:#137CD8;font-weight:800;min-height:40px;padding:0 6px;touch-action:manipulation}.channel-bar{background:#F4F8FF;border-bottom:1px solid rgba(47,168,247,.14)}.channel-inner{max-width:1140px;margin:auto;padding:9px 16px;display:flex;gap:17px;overflow-x:auto;scrollbar-width:none}.channel-inner::-webkit-scrollbar{display:none}.channel-inner a{color:#5D718A;font-size:14px;white-space:nowrap}.channel-inner a.is-current,.channel-inner a:hover{color:#137CD8;font-weight:700}.site-main{max-width:1140px;margin:0 auto;padding:30px 16px 78px}.page-hero{padding:36px 4px 24px}.page-hero h1{margin:0 0 10px;color:#137CD8;font-size:clamp(30px,4vw,42px);line-height:1.2}.page-hero p{margin:0;max-width:820px;color:#5D718A;font-size:17px}.content-panel,.article-card,.note-strip,.app-strip,.index-item,.stat{background:#fff;border:1px solid rgba(47,168,247,.14);box-shadow:0 12px 26px rgba(19,124,216,.10);border-radius:16px}.content-panel{padding:28px;margin:0 0 24px}.content-panel h2,.article-card h2,.app-strip h2{color:#137CD8;line-height:1.35}.article-width{max-width:820px;margin-left:auto;margin-right:auto}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:28px;align-items:center}.cards-2,.cards-3,.index-grid{display:grid;gap:18px;margin:0 0 24px}.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}.article-card{padding:23px}.article-card p:last-child{margin-bottom:0}.note-strip{padding:21px 24px;background:#F4F8FF;margin:0 0 24px}.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:15px}.related-links a{padding:8px 13px;background:#EDF5FF;border-radius:999px;font-weight:800}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:14px;background:#EDF5FF;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;background:linear-gradient(135deg,#EDF5FF,#DCEBFA)}.media.compact{min-height:190px}.carousel{position:relative;z-index:1;background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 12px 26px rgba(19,124,216,.12);margin-bottom:30px;height:clamp(240px,27vw,312px)}.carousel-track,.carousel-slide{position:absolute;inset:0}.carousel-slide{opacity:0;transition:opacity .35s ease;pointer-events:none}.carousel-slide.is-active{opacity:1;pointer-events:auto}.carousel-slide .media{height:100%;aspect-ratio:auto;border-radius:0}.carousel-prev,.carousel-next{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:42px;height:42px;border:0;border-radius:50%;background:rgba(255,255,255,.92);color:#137CD8;font-size:28px;cursor:pointer;touch-action:manipulation}.carousel-prev{left:14px}.carousel-next{right:14px}.carousel-dots{position:absolute;left:0;right:0;bottom:13px;z-index:2;display:flex;justify-content:center;gap:8px}.carousel-dot{width:9px;height:9px;border:0;border-radius:50%;background:rgba(19,124,216,.28);padding:0;cursor:pointer}.carousel-dot.is-active{background:#137CD8}.index-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.index-item{display:block;padding:21px;color:#24364F}.index-item strong{display:block;color:#137CD8;font-size:18px;margin-bottom:5px}.index-item span{color:#5D718A;font-size:14px}.app-strip{display:grid;grid-template-columns:210px minmax(0,1fr) auto;gap:20px;align-items:center;padding:20px;margin:0 0 24px}.app-strip p{margin:0}.stat-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:0 0 24px}.stat{padding:19px}.stat strong{display:block;color:#137CD8;font-size:20px}.timeline{display:grid;gap:14px;margin-bottom:24px}.timeline article{position:relative;padding:21px 22px 21px 56px;background:#fff;border-radius:16px;border:1px solid rgba(47,168,247,.14);box-shadow:0 9px 22px rgba(19,124,216,.07)}.timeline article:before{content:attr(data-step);position:absolute;left:18px;top:21px;width:25px;height:25px;border-radius:50%;display:grid;place-items:center;background:#137CD8;color:#fff;font-weight:800;font-size:12px}.feature-band{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-bottom:24px}.feature-band>div{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:24px;box-shadow:0 10px 24px rgba(19,124,216,.08)}.feature-band h2{margin-top:0;color:#137CD8}.side-float{position:fixed;right:12px;top:31%;z-index:8000;display:flex;flex-direction:column;gap:8px;width:105px}.side-float>a,.side-float>button{min-height:40px;padding:8px 10px;border-radius:12px;background:#fff;border:1px solid rgba(47,168,247,.18);color:#137CD8;font-weight:800;text-align:center;box-shadow:0 8px 20px rgba(19,124,216,.08)}.side-float .main-btn{color:#fff;border:0}.side-float button{cursor:pointer}.site-footer{background:#102B46;color:#EAF6FF}.footer-grid{max-width:1140px;margin:auto;padding:40px 16px 30px;display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:28px}.site-footer h2{font-size:16px;margin-top:0}.site-footer a{display:block;color:#EAF6FF;margin:7px 0}.footer-brand p{color:#bdd1e1;max-width:350px}.footer-bottom{max-width:1140px;margin:auto;padding:18px 16px 26px;border-top:1px solid rgba(255,255,255,.12);color:#bdd1e1;font-size:14px}.footer-bottom span{float:right}.mobile-drawer,.drawer-mask,.mobile-bottom{display:none}.drawer-actions{display:flex;gap:10px;padding:0 18px 10px}.drawer-open{overflow:hidden}.faq-list details{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:16px 18px;margin:0 0 12px}.faq-list summary{cursor:pointer;color:#137CD8;font-weight:800}.faq-list p{margin-bottom:0}.simple-table{width:100%;border-collapse:collapse;background:#fff}.simple-table th,.simple-table td{padding:13px 14px;border-bottom:1px solid #E4EDF6;text-align:left}.simple-table th{color:#137CD8;background:#F4F8FF}
@media(max-width:1180px){.side-float{display:none}}
@media(max-width:980px){.channel-bar{display:none}.nav-core{display:none}.menu-btn{display:inline-flex;align-items:center}.header-inner{min-height:62px}.site-logo{position:absolute;left:50%;transform:translateX(-50%)}.site-logo img{height:34px;max-width:132px}.auth-actions{gap:5px}.auth-actions .auth-link,.auth-actions .main-btn{min-width:auto;padding:0 11px;font-size:13px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);background:#fff;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;box-shadow:18px 0 40px rgba(16,43,70,.16);overflow-y:auto}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(16,43,70,.38);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:16px 18px}.drawer-close{min-height:40px;border:0;background:#EDF5FF;color:#137CD8;border-radius:10px;padding:0 12px;font-weight:800;touch-action:manipulation}.drawer-groups{padding:0 18px 28px}.drawer-groups section{padding:14px 0;border-top:1px solid #E7EEF6}.drawer-groups h2{font-size:13px;color:#5D718A;margin:0 0 6px}.drawer-groups a{display:block;padding:8px 0;color:#24364F}.mobile-bottom{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:8500;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid rgba(47,168,247,.2)}.mobile-bottom a{min-height:52px;display:grid;place-items:center;font-weight:800}.site-main{padding-bottom:86px}.split,.feature-band{grid-template-columns:1fr}.cards-3{grid-template-columns:repeat(2,minmax(0,1fr))}.stat-row{grid-template-columns:repeat(2,minmax(0,1fr))}.app-strip{grid-template-columns:140px minmax(0,1fr)}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.carousel{height:clamp(190px,45vw,250px)}}
@media(max-width:620px){.site-main{padding:18px 12px 82px}.header-inner{padding:0 10px}.site-logo img{height:31px;max-width:116px}.auth-actions .auth-link,.auth-actions .main-btn{height:38px;padding:0 9px;font-size:12px}.page-hero{padding:24px 2px 18px}.page-hero h1{font-size:28px}.page-hero p{font-size:15px}.carousel{height:clamp(145px,42vw,180px);margin-bottom:20px}.cards-2,.cards-3,.index-grid{grid-template-columns:1fr 1fr;gap:10px}.article-card,.content-panel{padding:18px}.index-item{padding:16px}.app-strip{grid-template-columns:1fr;padding:16px}.stat-row{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom span{float:none;display:block;margin-top:8px}.related-links{gap:7px}.related-links a{font-size:13px}.carousel-prev,.carousel-next{width:36px;height:36px;font-size:24px}}
@media(max-width:390px){.auth-actions{gap:3px}.auth-actions .auth-link,.auth-actions .main-btn{padding:0 7px;font-size:11px}.site-logo img{max-width:104px}.cards-2,.cards-3,.index-grid{grid-template-columns:1fr}}

/* v6: refined section rhythm */
.page-hero{border-bottom:1px solid rgba(47,168,247,.14)}
.index-grid{margin-top:18px}
.content-panel,.feature-band,.cards-2,.cards-3{scroll-margin-top:110px}