:root{--bg:#F5F9FE;--surface:#FFFFFF;--soft:#E8F2FC;--soft2:#F3F8FF;--blue:#2F7BFF;--blue2:#1E5FD6;--title:#16324F;--text:#243447;--muted:#5B6B7C;--note:#7A8896;--line:rgba(47,123,255,.16);--shadow:0 12px 32px rgba(22,50,79,.08);--footer:#10243A;--footerText:#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","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75}body.drawer-open{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;object-fit:contain;display:block}button,input{font:inherit}.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{width:min(1240px,calc(100% - 32px));height:72px;margin:auto;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px}.brand-logo img{width:auto;height:42px;max-width:180px}.core-nav{justify-self:center;display:flex;gap:6px;padding:5px;background:#fff;border:1px solid var(--line);border-radius:999px;box-shadow:0 8px 20px rgba(22,50,79,.05);white-space:nowrap}.core-nav a{padding:8px 14px;border-radius:999px;color:var(--title);font-size:14px}.core-nav a:hover,.core-nav a.active{background:var(--soft);color:var(--blue2)}.header-actions{display:flex;align-items:center;gap:8px;white-space:nowrap}.overview-btn,.login-btn,.register-btn,.main-btn{border-radius:999px;padding:9px 16px;font-weight:700;transition:.2s ease;cursor:pointer}.overview-btn{background:transparent;color:var(--title);border:1px solid transparent}.overview-btn:hover{background:var(--soft2)}.login-btn,.main-btn{background:var(--blue);color:#fff;border:1px solid var(--blue)}.login-btn:hover,.main-btn:hover{background:var(--blue2);border-color:var(--blue2)}.register-btn{background:#fff;color:var(--title);border:1px solid #C5D7F0}.register-btn:hover{border-color:var(--blue);color:var(--blue)}.mobile-menu-btn,.mobile-login{display:none}.drawer-overlay{position:fixed;inset:0;z-index:10000;background:rgba(16,36,58,.35);opacity:0;transition:.18s}.drawer-overlay.show{opacity:1}.overview-drawer,.mobile-drawer{position:fixed;top:0;bottom:0;z-index:10001;width:min(420px,92vw);background:#fff;box-shadow:-18px 0 50px rgba(16,36,58,.18);transition:transform .22s ease;overflow:auto}.overview-drawer{right:0;transform:translateX(102%)}.overview-drawer.open{transform:translateX(0)}.mobile-drawer{left:0;transform:translateX(-102%);box-shadow:18px 0 50px rgba(16,36,58,.18)}.mobile-drawer.open{transform:translateX(0)}.drawer-head{position:sticky;top:0;background:#fff;z-index:2;display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:12px;color:var(--title)}.drawer-brand img{height:38px;width:auto;max-width:150px}.drawer-close{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--soft2);color:var(--title);font-size:26px;line-height:1}.drawer-body{padding:12px 20px 30px}.drawer-group{padding:12px 0;border-bottom:1px solid #edf3fa}.drawer-group h2{font-size:15px;margin:0 0 8px;color:var(--title)}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.drawer-links a{padding:8px 10px;border-radius:10px;color:var(--muted);font-size:14px}.drawer-links a:hover{background:var(--soft2);color:var(--blue2)}main{min-height:60vh}.container{width:min(1200px,calc(100% - 32px));margin:0 auto}.section{padding:56px 0}.section.tight{padding:36px 0}.card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius)}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--blue2);font-size:13px;font-weight:700}.eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--blue)}h1,h2,h3{color:var(--title);line-height:1.3;margin-top:0}h1{font-size:clamp(32px,5vw,54px);letter-spacing:-.02em;margin-bottom:20px}h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}h3{font-size:20px;margin-bottom:10px}p{margin:0 0 16px}.hero{position:relative;overflow:hidden;padding:56px 0 42px}.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}.hero:before{width:330px;height:330px;background:rgba(47,123,255,.08);left:-130px;top:-160px}.hero:after{width:260px;height:260px;background:rgba(232,242,252,.9);right:-90px;bottom:-150px}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}.hero-copy .lead{font-size:17px;color:var(--muted);max-width:680px}.hero-actions{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap}.hero-visual{padding:18px}.hero-visual img{width:100%;height:auto}.hero-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}.summary-item{padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:14px}.summary-item strong{display:block;color:var(--title);font-size:14px}.summary-item span{display:block;color:var(--note);font-size:12px;margin-top:3px}.quick-scroll{display:flex;gap:12px;overflow-x:auto;padding:4px 2px 12px;scroll-snap-type:x proximity}.quick-card{flex:0 0 220px;scroll-snap-align:start;padding:18px}.quick-card .num{font-size:12px;color:var(--blue);font-weight:800}.quick-card strong{display:block;color:var(--title);margin-top:4px}.quick-card p{font-size:13px;color:var(--muted);margin:6px 0 0}.intro-strip{padding:22px 24px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;background:linear-gradient(135deg,#fff,var(--soft2))}.text-link{color:var(--blue2);font-weight:700}.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.feature-card{padding:24px}.feature-card ul{margin:14px 0 0;padding-left:20px;color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.topic-card{overflow:hidden;padding:0}.topic-card .img-wrap{background:var(--soft2);padding:14px;border-bottom:1px solid var(--line)}.topic-card .img-wrap img{width:100%;max-height:180px;object-fit:contain}.topic-card .body{padding:18px}.topic-card p{color:var(--muted);font-size:14px;min-height:48px}.app-banner{display:grid;grid-template-columns:.88fr 1.12fr;align-items:center;gap:28px;padding:28px}.app-banner .media{padding:10px;border-radius:14px;background:var(--soft2)}.media-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.media-card{overflow:hidden}.media-card .image{padding:14px;background:var(--soft2)}.media-card .content{padding:20px}.security-grid,.feedback-grid,.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.feedback{padding:20px}.feedback p{margin:0;color:var(--muted)}.faq-item{padding:20px}.faq-item p{color:var(--muted);margin:0}.compliance{padding:24px;border-left:4px solid var(--blue);background:#fff}.page-hero{padding:48px 0 24px}.page-hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:32px;align-items:center}.page-hero .lead{font-size:17px;color:var(--muted)}.page-image{padding:18px}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}.article-main{display:grid;gap:18px}.article-section{padding:24px}.article-section p{color:var(--muted)}.side-card{padding:22px;position:sticky;top:92px}.side-card ul{margin:12px 0 0;padding:0;list-style:none}.side-card li+li{margin-top:8px}.side-card a{display:block;padding:10px 12px;border-radius:10px;background:var(--soft2);color:var(--title)}.notice-list{display:grid;gap:10px;margin-top:14px}.notice-item{padding:12px 14px;border-radius:12px;background:var(--soft2);color:var(--muted);font-size:14px}.faq-long{display:grid;gap:14px}.faq-long .faq-item h3{font-size:18px}.site-footer{background:var(--footer);color:var(--footerText);margin-top:56px}.footer-inner{width:min(1200px,calc(100% - 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@media(max-width:1060px){.header-inner{gap:12px}.core-nav a{padding:8px 10px}.overview-btn{padding-left:10px;padding-right:10px}.topic-grid{grid-template-columns:repeat(3,1fr)}.hero-grid,.page-hero-grid{gap:28px}.article-grid{grid-template-columns:1fr 280px}}
@media(max-width:860px){.header-inner{width:min(100% - 22px,1200px);height:66px;grid-template-columns:44px 1fr 66px}.core-nav,.header-actions{display:none}.mobile-menu-btn{display:flex;width:42px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:4px;border:1px solid var(--line);background:#fff;border-radius:12px}.mobile-menu-btn span{width:18px;height:2px;background:var(--title);border-radius:3px}.brand-logo{justify-self:center}.brand-logo img{height:38px;max-width:150px}.mobile-login{display:inline-flex;justify-self:end;padding:8px 13px}.hero{padding-top:36px}.hero-grid,.page-hero-grid,.app-banner{grid-template-columns:1fr}.hero-visual{order:-1}.hero-summary{grid-template-columns:repeat(2,1fr)}.topic-grid{grid-template-columns:repeat(2,1fr)}.split-grid,.media-grid,.security-grid,.feedback-grid,.faq-grid{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr}.side-card{position:static}.footer-inner{grid-template-columns:1fr 1fr}.footer-note{grid-column:1/-1}.section{padding:44px 0}.page-hero{padding-top:36px}.mobile-bottom-nav{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);left:10px;right:10px;bottom:10px;z-index:9998;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 30px rgba(22,50,79,.14);overflow:hidden}.mobile-bottom-nav a{padding:9px 4px 8px;display:flex;flex-direction:column;align-items:center;font-size:12px;color:var(--muted)}.mobile-bottom-nav span{font-size:18px;color:var(--blue2);line-height:1.1}.site-footer{padding-bottom:74px}}
@media(max-width:560px){.container{width:min(100% - 24px,1200px)}h1{font-size:34px}.hero-summary{grid-template-columns:1fr 1fr}.quick-card{flex-basis:190px}.topic-grid{gap:12px}.topic-card .img-wrap{padding:10px}.topic-card .body{padding:14px}.topic-card p{min-height:0}.intro-strip{grid-template-columns:1fr}.footer-inner{width:min(100% - 24px,1200px);grid-template-columns:1fr;padding:34px 0}.footer-note{grid-column:auto}.app-banner,.article-section,.feature-card,.feedback,.faq-item,.compliance{padding:18px}.page-image{padding:12px}.drawer-links{grid-template-columns:1fr}.overview-drawer,.mobile-drawer{width:min(360px,92vw)}}