:root{
  --bg:#F5F9FE;--surface:#FFFFFF;--soft:#E8F2FC;--soft2:#F3F8FF;--blue:#2F7BFF;--blue-deep:#1E5FD6;
  --title:#16324F;--text:#243447;--muted:#5B6B7C;--note:#7A8896;--border:rgba(47,123,255,.16);
  --shadow:0 12px 32px rgba(22,50,79,.08);--footer:#10243A;--footer-text:#D7E6F5;--radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75}
body.drawer-open{overflow:hidden}
a{color:var(--blue-deep);text-decoration:none}
a:hover{color:var(--blue)}
img{max-width:100%;height:auto;object-fit:contain;display:block}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
h1,h2,h3{color:var(--title);line-height:1.28;margin-top:0}
p{margin:0 0 1em}
.container{width:min(1200px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:9999;background:rgba(245,249,254,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(47,123,255,.08)}
.header-inner{width:min(1240px,calc(100% - 32px));height:72px;margin:auto;display:flex;align-items:center;gap:20px;white-space:nowrap}
.brand-logo{display:flex;align-items:center;flex:0 0 auto}
.brand-logo img{height:42px;width:auto}
.core-nav{display:flex;gap:6px;align-items:center;background:#fff;padding:5px;border:1px solid var(--border);border-radius:999px;box-shadow:0 6px 20px rgba(22,50,79,.05);margin-left:8px}
.core-nav a{padding:8px 13px;border-radius:999px;color:var(--title);font-size:14px}
.core-nav a.active,.core-nav a:hover{background:var(--soft);color:var(--blue-deep)}
.header-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.overview-btn,.icon-btn,.drawer-close{border:0;background:transparent;color:var(--title)}
.overview-btn{padding:8px 10px}
.login-btn,.register-btn,.main-btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 18px;border-radius:999px;font-weight:700}
.login-btn,.main-btn{background:var(--blue);color:#fff;border:1px solid var(--blue)}
.login-btn:hover,.main-btn:hover{background:var(--blue-deep);color:#fff}
.register-btn{background:#fff;color:var(--title);border:1px solid #C5D7F0}
.mobile-menu-btn,.mobile-login{display:none}
.drawer-mask{position:fixed;inset:0;background:rgba(16,36,58,.35);opacity:0;visibility:hidden;transition:.25s;z-index:10000}
.drawer-mask.show{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;bottom:0;width:min(410px,88vw);background:#fff;z-index:10001;transition:transform .28s ease;box-shadow:0 24px 60px rgba(16,36,58,.18);overflow-y:auto}
.drawer-left{left:0;transform:translateX(-105%)}
.drawer-right{right:0;transform:translateX(105%)}
.drawer.open{transform:translateX(0)}
.drawer-head{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;background:#fff;border-bottom:1px solid var(--border);z-index:2}
.drawer-head img{height:38px;width:auto}
.drawer-close{font-size:30px;line-height:1;padding:4px 8px}
.drawer-body{padding:18px 20px 28px}
.drawer-group{margin-bottom:22px}
.drawer-group h3{font-size:15px;margin-bottom:8px}
.drawer-group a{display:block;padding:9px 0;color:var(--text);border-bottom:1px solid rgba(47,123,255,.08)}
.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}
main{min-height:60vh}
.hero{padding:58px 0 44px;position:relative;overflow:hidden}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}
.hero:before{width:320px;height:320px;background:rgba(47,123,255,.08);right:-80px;top:-120px}
.hero:after{width:220px;height:220px;background:rgba(47,123,255,.05);left:-80px;bottom:-80px}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;gap:38px;align-items:center}
.eyebrow{display:inline-flex;padding:6px 11px;border-radius:999px;background:var(--soft);color:var(--blue-deep);font-size:13px;font-weight:700;margin-bottom:16px}
.hero h1{font-size:clamp(34px,4vw,54px);margin-bottom:18px}
.hero-copy{font-size:17px;color:var(--muted);max-width:720px}
.hero-actions{display:flex;gap:10px;margin-top:24px}
.hero-card,.card{background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);border-radius:var(--radius)}
.hero-card{padding:18px}
.hero-card img{width:100%;height:auto}
.summary-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}
.summary-chip{padding:14px 16px;background:rgba(255,255,255,.86);border:1px solid var(--border);border-radius:14px}
.summary-chip strong{display:block;color:var(--title);font-size:15px}
.summary-chip span{font-size:12px;color:var(--note)}
.section{padding:56px 0}
.section.alt{background:var(--soft2)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
.section-head h2{font-size:30px;margin-bottom:8px}
.section-head p{color:var(--muted);max-width:760px;margin:0}
.text-link{font-weight:700;white-space:nowrap}
.quick-scroll{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(210px,1fr);gap:14px;overflow-x:auto;padding:3px 2px 14px;scroll-snap-type:x proximity}
.quick-card{scroll-snap-align:start;padding:18px}
.quick-no{font-size:12px;color:var(--blue);font-weight:800}
.quick-card h3{font-size:18px;margin:5px 0 7px}
.quick-card p{font-size:14px;color:var(--muted);margin-bottom:9px}
.intro-strip{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;padding:24px 26px;align-items:center}
.intro-strip ul{margin:0;padding-left:20px;color:var(--muted)}
.dual-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.feature-card{padding:24px}
.feature-card img{width:100%;max-height:260px;margin-bottom:18px}
.feature-card h3{font-size:24px;margin-bottom:10px}
.feature-card p{color:var(--muted)}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.topic-card{overflow:hidden}
.topic-media{padding:16px 16px 0}
.topic-media img{width:100%;max-height:180px}
.topic-content{padding:16px 18px 18px}
.topic-content h3{font-size:18px;margin-bottom:6px}
.topic-content p{font-size:14px;color:var(--muted);min-height:48px}
.app-banner{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center;padding:28px}
.app-banner img{max-height:280px;width:100%}
.news-grid,.service-grid,.review-grid,.faq-grid{display:grid;gap:18px}
.news-grid{grid-template-columns:1fr 1fr}
.news-card{padding:18px}
.news-card img{width:100%;max-height:260px;margin-bottom:16px}
.service-grid{grid-template-columns:repeat(3,1fr)}
.service-card{padding:22px}
.service-card h3{font-size:20px;margin-bottom:8px}
.service-card p{color:var(--muted);font-size:14px}
.review-grid{grid-template-columns:repeat(3,1fr)}
.review-card{padding:20px}
.review-card .quote{font-size:15px;color:var(--text)}
.review-card .meta{margin-top:12px;color:var(--note);font-size:13px}
.faq-grid{grid-template-columns:1fr 1fr}
.faq-item{padding:20px}
.faq-item h3{font-size:18px;margin-bottom:9px}
.faq-item p{color:var(--muted);margin:0}
.notice{padding:22px 24px;background:#fff;border-left:4px solid var(--blue);border-radius:14px;box-shadow:var(--shadow)}
.notice strong{color:var(--title)}
.page-hero{padding:52px 0 28px}
.page-hero-grid{display:grid;grid-template-columns:1fr .78fr;gap:34px;align-items:center}
.page-hero h1{font-size:clamp(32px,4vw,48px);margin-bottom:16px}
.page-hero p{font-size:16px;color:var(--muted)}
.page-hero .hero-card img{max-height:300px}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.article-card{padding:28px}
.article-card + .article-card{margin-top:20px}
.article-card h2{font-size:26px;margin-bottom:14px}
.article-card h3{font-size:19px;margin-top:22px;margin-bottom:8px}
.article-card p{color:var(--text)}
.article-card ul{padding-left:22px;color:var(--muted)}
.side-stack{position:sticky;top:96px;display:grid;gap:16px}
.side-card{padding:20px}
.side-card h3{font-size:18px;margin-bottom:10px}
.side-card a{display:block;padding:7px 0;border-bottom:1px solid rgba(47,123,255,.08)}
.feedback-list{display:grid;gap:12px}
.feedback-item{padding:16px 18px;background:var(--soft2);border-radius:12px}
.qa-list{display:grid;gap:14px}
.qa-item{padding:18px;border:1px solid var(--border);border-radius:14px}
.qa-item h3{font-size:18px;margin-bottom:8px}
.qa-item p{margin:0;color:var(--muted)}
.site-footer{background:var(--footer);color:var(--footer-text);margin-top:58px}
.footer-grid{display:grid;grid-template-columns:1.7fr repeat(3,1fr);gap:32px;padding:46px 0 36px}
.footer-brand img{height:42px;width:auto;margin-bottom:14px;filter:brightness(1.3)}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:12px}
.site-footer a{display:block;color:var(--footer-text);padding:4px 0;font-size:14px}
.footer-brand p{color:#b8cce0;max-width:500px}
.footer-bottom{border-top:1px solid rgba(215,230,245,.12);padding:16px 0 20px;font-size:13px;color:#b8cce0}
.mobile-bottom-nav{display:none}
@media (max-width:1100px){
  .header-inner{gap:12px}
  .core-nav a{padding:8px 10px}
  .topic-grid{grid-template-columns:repeat(3,1fr)}
  .content-layout{grid-template-columns:1fr}
  .side-stack{position:static;grid-template-columns:repeat(3,1fr)}
}
@media (max-width:900px){
  .header-inner{height:68px}
  .core-nav,.header-actions{display:none}
  .mobile-menu-btn,.mobile-login{display:inline-flex}
  .mobile-menu-btn{width:40px;height:40px;align-items:center;justify-content:center;flex-direction:column;gap:4px;padding:8px}
  .mobile-menu-btn span{width:20px;height:2px;background:var(--title);border-radius:2px}
  .brand-logo{position:absolute;left:50%;transform:translateX(-50%)}
  .brand-logo img{height:38px}
  .mobile-login{margin-left:auto;min-height:38px;padding:0 16px}
  .hero{padding:36px 0 28px}
  .hero-grid,.page-hero-grid,.app-banner,.intro-strip{grid-template-columns:1fr}
  .summary-row{grid-template-columns:1fr 1fr}
  .dual-grid,.news-grid,.faq-grid{grid-template-columns:1fr}
  .service-grid,.review-grid{grid-template-columns:1fr 1fr}
  .topic-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-grid>div:last-child{grid-column:2 / 4}
  .mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:9998;display:grid;grid-template-columns:repeat(4,1fr);background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-top:1px solid var(--border);padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));box-shadow:0 -8px 24px rgba(22,50,79,.08)}
  .mobile-bottom-nav a{text-align:center;color:var(--title);font-size:13px;padding:5px}
  body{padding-bottom:66px}
}
@media (max-width:680px){
  .container{width:min(100% - 28px,1200px)}
  .header-inner{width:calc(100% - 20px)}
  .hero h1,.page-hero h1{font-size:32px}
  .hero-copy{font-size:15px}
  .section{padding:42px 0}
  .section-head{align-items:start;flex-direction:column}
  .section-head h2{font-size:26px}
  .topic-grid{grid-template-columns:1fr 1fr;gap:12px}
  .topic-media{padding:12px 12px 0}
  .topic-content{padding:12px 14px 14px}
  .topic-content p{min-height:0}
  .service-grid,.review-grid,.side-stack{grid-template-columns:1fr}
  .app-banner,.article-card{padding:20px}
  .page-hero{padding-top:34px}
  .overview-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer-brand{grid-column:1 / 3}
  .footer-grid>div:last-child{grid-column:auto}
}
@media (max-width:430px){
  .summary-row{grid-template-columns:1fr 1fr}
  .topic-card h3{font-size:16px}
  .topic-content p{font-size:13px}
}