*{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:1.8}a{color:#137cd8;text-decoration:none}img{max-width:100%}button,a{touch-action:manipulation}.site-header{position:sticky;top:0;z-index:9000;background:rgba(255,255,255,.96);box-shadow:0 6px 18px rgba(19,124,216,.08);backdrop-filter:blur(10px)}.header-inner{max-width:1140px;min-height:68px;margin:auto;padding:0 16px;display:flex;align-items:center;gap:18px;justify-content:space-between}.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-fallback{font-weight:800;color:#137cd8;font-size:21px}.nav-core{display:flex;align-items:center;justify-content:center;gap:2px;flex:1}.nav-core a{color:#24364f;padding:9px 10px;font-weight:700;white-space:nowrap}.nav-core a:hover,.nav-core a.is-current{color:#137cd8;box-shadow:inset 0 -2px 0 #2fa8f7}.auth-actions{display:flex;gap:8px}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;min-width:76px;padding:0 16px;border-radius:999px;background:linear-gradient(135deg,#45c7ff,#2fa8f7 48%,#137cd8);color:#fff;font-weight:800;box-shadow:0 8px 18px rgba(19,124,216,.16)}.ghost-btn{background:#fff;color:#137cd8;border:1px solid rgba(19,124,216,.24);box-shadow:none}.mobile-menu-btn{display:none;border:0;background:transparent;color:#137cd8;font-weight:800;font-size:15px;min-height:40px}.channel-strip{background:#f4f8ff;border-top:1px solid rgba(47,168,247,.1);border-bottom:1px solid rgba(47,168,247,.14)}.channel-inner{max-width:1140px;margin:auto;padding:8px 16px;display:flex;overflow-x:auto;gap:18px;scrollbar-width:none}.channel-inner::-webkit-scrollbar{display:none}.channel-inner a{color:#5d718a;white-space:nowrap;font-size:14px;font-weight:700}.channel-inner a:hover{color:#137cd8}.site-main{max-width:1140px;margin:0 auto;padding:28px 72px 70px 16px}.section{margin:0 0 34px}.hero-slider{position:relative;height:292px;background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 12px 26px rgba(19,124,216,.12);z-index:1}.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .35s ease;display:flex;align-items:center;justify-content:center}.hero-slide.is-active{opacity:1}.hero-slide img{width:100%;height:100%;object-fit:contain}.hero-placeholder,.media-placeholder{height:100%;display:flex;align-items:center;justify-content:center;background:#edf5ff;color:#7890aa;font-weight:700}.slider-prev,.slider-next{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:42px;height:42px;border:0;border-radius:50%;background:rgba(16,43,70,.7);color:#fff;font-size:27px}.slider-prev{left:14px}.slider-next{right:14px}.slider-dots{position:absolute;bottom:13px;left:0;right:0;display:flex;justify-content:center;gap:8px;z-index:2}.slider-dot{width:9px;height:9px;border-radius:50%;border:0;padding:0;background:#a8b9ca}.slider-dot.is-active{background:#137cd8;transform:scale(1.2)}.page-title{font-size:38px;line-height:1.25;margin:4px 0 16px;color:#102b46}.lead{max-width:820px;font-size:18px;color:#5d718a;margin:0}.home-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.home-card{background:#fff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:20px;box-shadow:0 10px 22px rgba(19,124,216,.08);color:#24364f}.home-card strong{display:block;color:#137cd8;font-size:19px;margin-bottom:5px}.home-card span{display:block;color:#5d718a;font-size:14px}.note-band{background:#f4f8ff;border:1px solid rgba(47,168,247,.14);border-radius:16px;padding:20px 22px}.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:center}.paper,.article-shell{background:#fff;border-radius:18px;padding:26px;box-shadow:0 12px 26px rgba(19,124,216,.09)}.paper h2,.article-shell h2{color:#137cd8;font-size:25px;margin:0 0 10px}.paper p,.article-shell p{margin:0 0 15px}.article-shell{max-width:840px}.article-head{margin-bottom:24px}.breadcrumb{font-size:14px;color:#71879c;margin-bottom:12px}.article-head h1{font-size:36px;line-height:1.28;color:#102b46;margin:0 0 12px}.article-head .summary{font-size:17px;color:#5d718a;margin:0}.article-section{padding:22px 0;border-top:1px solid #edf2f8}.article-section:first-of-type{border-top:0}.media{position:relative;width:100%;overflow:hidden;border-radius:15px;background:#edf5ff;aspect-ratio:16/9;margin:10px 0 24px}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center}.media.compact{max-height:210px}.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.related a{background:#f4f8ff;border:1px solid rgba(47,168,247,.16);border-radius:999px;padding:7px 13px;font-weight:700}.app-strip{display:grid;grid-template-columns:280px 1fr;gap:22px;background:#fff;border-radius:16px;padding:22px;align-items:center}.faq-grid{display:grid;gap:12px}.faq-item{background:#fff;border-radius:14px;padding:20px;border:1px solid rgba(47,168,247,.14)}.faq-item h2{font-size:19px;margin:0 0 7px;color:#137cd8}.site-footer{background:#102b46;color:#eaf6ff;padding:42px 16px 18px}.footer-grid{max-width:1140px;margin:auto;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px}.site-footer h2{font-size:16px;margin:0 0 10px;color:#fff}.site-footer a{display:block;color:#eaf6ff;margin:6px 0}.footer-logo{display:inline-block;margin-bottom:8px}.footer-bottom{max-width:1140px;margin:25px auto 0;padding-top:16px;border-top:1px solid rgba(234,246,255,.18);font-size:13px;color:#bed1df}.float-tools{position:fixed;right:12px;top:35%;z-index:8000;width:58px;background:#fff;border-radius:16px;padding:8px;box-shadow:0 12px 30px rgba(16,43,70,.15);display:grid;gap:8px;text-align:center}.float-tools a,.float-tools button{font-size:12px;border:0;background:#fff;color:#137cd8;padding:8px 2px}.float-tools .main-btn{color:#fff;background:linear-gradient(135deg,#45c7ff,#2fa8f7,#137cd8);min-width:0}.mobile-bottom{display:none}.mobile-drawer,.drawer-mask{display:none}
@media(max-width:980px){.header-inner{gap:8px}.mobile-menu-btn{display:inline-flex;align-items:center}.nav-core{display:none}.site-logo{position:absolute;left:50%;transform:translateX(-50%)}.site-logo img{max-width:120px;height:32px}.auth-actions{margin-left:auto;gap:5px}.auth-actions .main-btn{min-width:56px;padding:0 10px;font-size:13px}.channel-strip{display:none}.site-main{padding:22px 14px 84px}.float-tools{display:none}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:8500;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid rgba(47,168,247,.2);padding:7px 6px calc(7px + env(safe-area-inset-bottom));text-align:center}.mobile-bottom a{padding:7px 2px;font-size:13px;font-weight:700}.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)}.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{height:64px;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #edf2f7}.drawer-close{border:0;background:#f4f8ff;color:#137cd8;border-radius:9px;min-height:40px;padding:0 12px;font-weight:700}.drawer-scroll{height:calc(100vh - 64px);overflow:auto;padding:12px 16px 32px}.drawer-scroll section{margin-bottom:17px}.drawer-scroll h2{font-size:13px;color:#7890aa;margin:0 0 5px}.drawer-scroll a{display:block;padding:8px 0;color:#24364f;font-weight:700}.drawer-auth{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.drawer-auth .main-btn{text-align:center}.drawer-open{overflow:hidden}.hero-slider{height:190px}.home-grid{grid-template-columns:repeat(2,1fr)}.two-col,.app-strip{grid-template-columns:1fr}.article-shell{max-width:none}.page-title,.article-head h1{font-size:29px}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.hero-slider{height:160px;border-radius:14px}.home-card{padding:15px}.home-card strong{font-size:16px}.home-card span{font-size:13px}.paper,.article-shell{padding:20px 17px}.site-logo img{max-width:105px}.auth-actions .main-btn{min-width:50px;padding:0 8px}.footer-grid{grid-template-columns:1fr}.page-title,.article-head h1{font-size:27px}}

/* v6 refresh */
.page-title{max-width:900px}
.home-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.home-card{min-height:132px;display:flex;flex-direction:column;justify-content:space-between}
.home-card strong{font-size:20px}
.note-band{border-left:4px solid #2FA8F7}
.paper.two-col{align-items:center}
.article-head{padding-bottom:18px;border-bottom:1px solid rgba(47,168,247,.14)}
.article-section{padding:22px 0;border-bottom:1px solid rgba(47,168,247,.10)}
.article-section:last-of-type{border-bottom:0}
@media(max-width:760px){
  .home-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .home-card{min-height:118px}
}