:root{--bg:#F5F9FE;--surface:#FFFFFF;--soft:#E8F2FC;--soft2:#F3F8FF;--blue:#2F7BFF;--blue2:#1E5FD6;--title:#16324F;--text:#243447;--muted:#5B6B7C;--muted2:#7A8896;--line:rgba(47,123,255,.16);--shadow:0 12px 32px rgba(22,50,79,.08);--footer:#10243A;--footerText:#D7E6F5}*{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:1.72;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;object-fit:contain;display:block}button,a{font:inherit}.container{width:min(1220px,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 var(--line)}.header-inner{height:72px;width:min(1240px,calc(100% - 28px));margin:0 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var(--line);background:var(--soft2);color:var(--title);font-size:24px;line-height:1;cursor:pointer}.drawer-groups{padding:18px 20px 34px}.drawer-groups section{padding:14px 0;border-bottom:1px solid #edf3f9}.drawer-groups h2{font-size:15px;margin:0 0 8px;color:var(--title)}.drawer-groups a,.mobile-all-nav a{display:block;padding:9px 10px;border-radius:10px;color:var(--text)}.drawer-groups a:hover,.mobile-all-nav a:hover{background:var(--soft2);color:var(--blue2)}.mobile-all-nav{padding:14px 18px 36px}.hero{padding:64px 0 54px;position:relative;overflow:hidden}.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(6px);background:rgba(47,123,255,.08);pointer-events:none}.hero:before{width:360px;height:360px;right:-110px;top:-140px}.hero:after{width:240px;height:240px;left:-90px;bottom:-120px}.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:42px;align-items:center;position:relative}.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--soft);color:var(--blue2);padding:7px 12px;border-radius:999px;font-size:13px;font-weight:700}.hero h1,.page-hero h1{font-size:clamp(34px,5vw,54px);line-height:1.14;letter-spacing:-.03em;color:var(--title);margin:18px 0}.hero p,.page-hero p{font-size:17px;color:var(--muted);margin:0 0 22px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap}.hero-card,.card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px}.hero-card{padding:18px}.hero-card img{width:100%;height:auto}.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:24px}.stat{background:var(--soft2);border:1px solid var(--line);border-radius:14px;padding:14px}.stat strong{display:block;color:var(--title);font-size:15px}.stat span{display:block;color:var(--muted);font-size:12px;margin-top:3px}.section{padding:58px 0}.section.tight{padding-top:24px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:24px}.section-head h2{margin:0;color:var(--title);font-size:30px}.section-head p{margin:6px 0 0;color:var(--muted);max-width:760px}.text-link{color:var(--blue2);font-weight:700}.quick-strip{display:flex;gap:12px;overflow-x:auto;padding:4px 2px 14px;scrollbar-width:thin}.quick-card{flex:0 0 220px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px}.quick-card b{display:block;color:var(--blue2);font-size:12px;margin-bottom:7px}.quick-card strong{display:block;color:var(--title);font-size:17px}.quick-card span{display:block;color:var(--muted);font-size:13px;margin-top:6px}.intro-bar{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;background:linear-gradient(135deg,var(--soft),#fff);border:1px solid var(--line);border-radius:20px;padding:24px}.intro-bar h2{margin:0 0 10px;color:var(--title)}.intro-bar 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h2{color:var(--title);font-size:25px;margin:30px 0 10px}.article-card h2:first-child{margin-top:0}.article-card p{margin:0 0 14px;color:var(--text)}.article-card ul{margin:8px 0 18px;padding-left:20px}.article-card li{margin:7px 0;color:var(--muted)}.side-stack{display:grid;gap:16px}.side-card{padding:20px}.side-card h2{font-size:18px;margin:0 0 10px;color:var(--title)}.side-card a{display:block;padding:8px 0;color:var(--blue2);border-bottom:1px dashed #d9e6f5}.side-card a:last-child{border-bottom:0}.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.site-footer{background:var(--footer);color:var(--footerText);margin-top:64px;padding:48px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:28px}.footer-brand img{height:42px;width:auto;max-width:155px;margin-bottom:14px}.site-footer h2{font-size:15px;color:#fff;margin:0 0 10px}.site-footer a{display:block;color:var(--footerText);font-size:14px;padding:5px 0}.site-footer p{color:#afc5da;max-width:420px}.footer-note{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:20px;font-size:13px;color:#afc5da}.mobile-bottom-nav{display:none}.spacer-sm{height:8px}
@media(max-width:1020px){.core-nav a{padding:8px 10px}.overview-btn{display:none}.topic-grid{grid-template-columns:repeat(3,1fr)}.hero-grid,.page-hero-grid{gap:28px}.content-grid{grid-template-columns:1fr 280px}}
@media(max-width:820px){.header-inner{height:66px;justify-content:space-between}.brand-logo{position:absolute;left:50%;transform:translateX(-50%)}.brand-logo img{height:38px;max-width:135px}.core-nav,.header-actions{display:none}.mobile-menu-btn{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--title);font-size:21px}.mobile-login{display:inline-flex;min-width:66px;padding:0 14px}.hero{padding-top:38px}.hero-grid,.page-hero-grid,.intro-bar,.app-banner,.content-grid{grid-template-columns:1fr}.hero h1,.page-hero h1{font-size:38px}.hero-stats{grid-template-columns:repeat(2,1fr)}.topic-grid{grid-template-columns:repeat(2,1fr)}.review-grid,.two-col,.faq-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:9998;height:60px;background:rgba(255,255,255,.97);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);box-shadow:0 -10px 24px rgba(22,50,79,.06)}.mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;color:var(--title);font-size:13px}body{padding-bottom:60px}.section{padding:46px 0}.site-footer{margin-top:48px}.page-hero{padding-top:34px}}
@media(max-width:560px){.container{width:min(100% - 28px,1220px)}.hero h1,.page-hero h1{font-size:32px}.hero p,.page-hero p{font-size:15px}.hero-card,.page-image{padding:12px}.section-head{align-items:flex-start;flex-direction:column}.section-head h2,.app-banner h2{font-size:26px}.topic-grid{gap:12px}.topic-card{padding:12px}.topic-card h3{font-size:16px}.topic-card p{font-size:13px}.intro-points{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.review-grid{grid-template-columns:1fr}.article-card{padding:20px}.site-footer{padding-bottom:34px}}