*{box-sizing:border-box}
html{scroll-behavior:smooth;background:#EAF2FB}
body{margin:0;background:#EAF2FB;color:#24364F;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}
a{color:#137CD8;text-decoration:none}a:hover{text-decoration:none}
button,a{touch-action:manipulation}
img{max-width:100%}
.site-header{position:sticky;top:0;z-index:9000;width:100%;background:#FFFFFF;border-bottom:1px solid rgba(47,168,247,.18)}
.header-inner{max-width:1160px;min-height:68px;margin:0 auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.site-logo,.drawer-logo,.footer-logo{display:flex;align-items:center;flex:0 0 auto}
.site-logo img{display:block;height:36px;width:auto;max-width:150px;object-fit:contain}
.drawer-logo img,.footer-logo img{display:block;height:34px;width:auto;max-width:150px;object-fit:contain}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;min-width:136px;height:36px;padding:0 14px;background:#EDF5FF;color:#137CD8;border-radius:10px;font-weight:800;letter-spacing:.04em}
.nav-core{display:flex;align-items:center;justify-content:center;gap:2px;min-width:0;white-space:nowrap}
.nav-core a{color:#24364F;padding:8px 12px;font-weight:700;text-decoration:none;white-space:nowrap}
.nav-core a.is-current,.nav-core a:hover{color:#137CD8;background:#F4F8FF;border-radius:999px}
.main-btn{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:92px;padding:0 18px;background:linear-gradient(135deg,#45C7FF 0%,#2FA8F7 48%,#137CD8 100%);color:#FFFFFF;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 22px rgba(19,124,216,.18);touch-action:manipulation}
.header-btn{flex:0 0 auto}
.menu-btn{display:none;border:0;background:transparent;color:#137CD8;font-weight:800;min-height:40px;padding:0 8px;font-size:15px}
.channel-bar{background:#FFFFFF;border-top:1px solid rgba(47,168,247,.08)}
.channel-inner{max-width:1160px;margin:0 auto;padding:0 18px;display:flex;gap:20px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}
.channel-inner a{display:inline-flex;align-items:center;min-height:44px;color:#5D718A;font-size:14px;border-bottom:2px solid transparent}
.channel-inner a:hover,.channel-inner a.is-current{color:#137CD8;border-bottom-color:#137CD8}
.site-main{min-height:60vh;padding:28px 18px 64px}
.container{max-width:1160px;margin:0 auto}
.article{max-width:800px;margin:0 auto}
.breadcrumb{font-size:14px;color:#5D718A;margin:0 0 14px}.breadcrumb a{color:#5D718A}
.hero-grid,.split{display:grid;grid-template-columns:40% 60%;gap:28px;align-items:center}
.split.reverse{grid-template-columns:52% 48%}
.hero-copy,.panel,.article-shell,.topic-card,.index-row,.notice-strip{background:#FFFFFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;box-shadow:0 10px 24px rgba(19,124,216,.10)}
.hero-copy{padding:28px}.hero-copy p{margin:0 0 18px}
h1{font-size:clamp(32px,4vw,40px);line-height:1.25;color:#137CD8;margin:0 0 18px;letter-spacing:-.02em}
h2{font-size:24px;line-height:1.35;color:#137CD8;margin:0 0 14px}h3{color:#24364F;margin:0 0 10px}
p{margin:0 0 14px;font-size:17px}ul,ol{margin:10px 0 18px;padding-left:1.25em}.lead{font-size:18px;color:#405873}
.section{margin:38px auto}.section.tight{margin-top:24px;margin-bottom:24px}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:12px;background:#EDF5FF;aspect-ratio:16/9;z-index:1}
.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#EDF5FF,#F7FBFF);border:1px dashed rgba(19,124,216,.18)}
.hero-media{height:270px;aspect-ratio:auto}.story-media{height:220px;aspect-ratio:auto}
.static-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.static-gallery .media{height:138px;aspect-ratio:auto}
.directory{background:#FFFFFF;border-radius:12px;overflow:hidden;border:1px solid rgba(47,168,247,.14);box-shadow:0 10px 24px rgba(19,124,216,.08)}
.index-row{border:0;border-bottom:1px solid rgba(47,168,247,.12);border-radius:0;box-shadow:none;display:grid;grid-template-columns:180px 1fr;gap:20px;padding:18px 20px;align-items:center}
.index-row:last-child{border-bottom:0}.index-row strong a{font-size:18px}.index-row p{font-size:15px;margin:0;color:#5D718A}
.notice-strip{padding:18px 22px;background:#F4F8FF;color:#405873;box-shadow:none;font-size:15px}
.article-shell{padding:30px}.article-shell section+section{margin-top:30px}.article-shell p,.article-shell li{font-size:17px}.article-shell a.text-link{font-weight:700}
.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.related a{background:#F4F8FF;border:1px solid rgba(47,168,247,.14);border-radius:999px;padding:8px 12px}
.topic-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.topic-card{padding:20px}.topic-card p{font-size:15px;color:#5D718A}.topic-card a{font-weight:800}
.steps{counter-reset:item;display:grid;gap:14px}.step{background:#F7FBFF;border-left:4px solid #2FA8F7;border-radius:10px;padding:16px 18px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}.compare>div{background:#F7FBFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;padding:18px}
.faq-item{background:#F7FBFF;border:1px solid rgba(47,168,247,.14);border-radius:12px;padding:18px 20px;margin:12px 0}.faq-item h2{font-size:20px;color:#24364F;margin-bottom:8px}
.floating-tools{position:fixed;right:12px;top:38%;z-index:8000;display:flex;flex-direction:column;gap:8px;width:108px}.floating-tools a,.floating-tools button{min-height:40px;border:1px solid rgba(47,168,247,.18);background:#FFFFFF;color:#137CD8;border-radius:10px;padding:8px 10px;font:inherit;font-weight:700;text-align:center}.floating-tools .main-btn{color:#fff;border:0}.floating-tools button{cursor:pointer}
.mobile-bottom{display:none}
.site-footer{background:#102B46;color:#EAF6FF;padding:42px 18px 24px}.footer-grid{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px}.footer-grid h2{font-size:18px;color:#FFFFFF}.footer-grid a{display:block;color:#EAF6FF;margin:5px 0}.footer-grid p{font-size:15px;color:#D9ECFA}.footer-placeholder{background:rgba(255,255,255,.08);color:#fff}.footer-bottom{max-width:1160px;margin:28px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:#CBE5F8}
.mobile-drawer,.drawer-mask{display:none}
.drawer-open{overflow:hidden}
@media(max-width:1180px){.floating-tools{display:none}.site-main{padding-right:18px}}
@media(max-width:980px){
  .nav-core,.channel-bar{display:none}.menu-btn{display:inline-flex;align-items:center;justify-content:flex-start}.header-inner{display:grid;grid-template-columns:1fr auto 1fr;min-height:62px;padding:0 12px;gap:6px}.site-logo{justify-self:center}.header-btn{justify-self:end;min-width:78px;padding:0 13px}.site-logo img{height:32px;max-width:134px}.logo-placeholder{min-width:118px;height:32px;padding:0 10px;font-size:14px}
  .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-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;border-bottom:1px solid rgba(47,168,247,.14)}
  .drawer-close{min-height:40px;border:0;background:#F4F8FF;color:#137CD8;border-radius:10px;padding:0 12px;font-weight:800}
  .drawer-groups{padding:10px 16px 28px}.drawer-groups section{padding:10px 0 14px;border-bottom:1px solid rgba(47,168,247,.12)}.drawer-groups h2{font-size:14px;color:#5D718A;margin:0 0 6px}.drawer-groups a{display:block;color:#24364F;padding:8px 2px;font-weight:700}
  .site-main{padding:22px 14px 84px}.hero-grid,.split,.split.reverse{grid-template-columns:1fr;gap:18px}.hero-copy{padding:22px}.split.reverse .media{order:2}
  .static-gallery{grid-template-columns:repeat(2,1fr);gap:10px}.static-gallery .media{height:118px}.hero-media{height:176px}.story-media{height:190px}.index-row{grid-template-columns:1fr;gap:4px}.topic-list{grid-template-columns:1fr}.compare{grid-template-columns:1fr}.article-shell{padding:22px}
  h1{font-size:clamp(26px,7vw,32px)}h2{font-size:22px}p,.article-shell p,.article-shell li{font-size:16px;line-height:1.8}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:8500;display:grid;grid-template-columns:repeat(4,1fr);background:#FFFFFF;border-top:1px solid rgba(47,168,247,.2);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:54px;color:#24364F;font-size:14px;font-weight:700}
  .footer-grid{grid-template-columns:1fr;gap:18px}.site-footer{padding-bottom:90px}
}
@media(max-width:430px){.header-inner{grid-template-columns:74px 1fr 86px}.menu-btn{padding-left:0}.header-btn{min-width:82px;padding:0 10px}.site-logo img{height:30px;max-width:126px}.logo-placeholder{min-width:104px;font-size:13px}.static-gallery .media{height:108px}}
@media(max-width:390px){.header-inner{grid-template-columns:64px 1fr 84px;padding:0 10px}.menu-btn{font-size:14px}.header-btn{font-size:14px;min-width:80px}.site-logo img{height:29px;max-width:120px}}
@media(max-width:375px){.header-inner{grid-template-columns:60px 1fr 80px;padding:0 9px}.header-btn{min-width:76px;padding:0 8px}.site-logo img{height:28px;max-width:114px}.logo-placeholder{min-width:96px;padding:0 6px}}