:root{--bg:#F5F9FE;--surface:#FFFFFF;--soft:#E8F2FC;--soft2:#F3F8FF;--blue:#2F7BFF;--blue2:#1E5FD6;--title:#16324F;--text:#243447;--muted:#5B6B7C;--hint:#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","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75}body.drawer-open{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;object-fit:contain}button,input,textarea{font:inherit}.container{width:min(1220px,calc(100% - 36px));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)}.topbar{height:72px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px}.brand-logo{display:flex;align-items:center}.brand-logo img{height:40px;width:auto;max-width:170px}.core-nav{justify-self:center;display:flex;gap:5px;padding:5px;border:1px solid var(--line);background:#fff;border-radius:999px;box-shadow:0 8px 24px rgba(22,50,79,.05)}.nav-pill{padding:8px 14px;border-radius:999px;font-size:14px;color:var(--title);white-space:nowrap}.nav-pill:hover,.nav-pill.active{background:var(--soft);color:var(--blue2)}.header-actions{display:flex;gap:9px;align-items:center}.overview-btn,.login-btn,.register-btn,.main-btn{border-radius:999px;padding:10px 18px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;cursor:pointer}.overview-btn{border:0;background:transparent;color:var(--title)}.login-btn,.main-btn{background:var(--blue);color:#fff;border:1px solid var(--blue)}.register-btn{background:#fff;color:var(--title);border:1px solid #C5D7F0}.login-btn:hover,.main-btn:hover{background:var(--blue2)}.register-btn:hover{border-color:var(--blue);color:var(--blue2)}.menu-btn,.close-btn{border:0;background:transparent;color:var(--title);cursor:pointer}.menu-btn{font-size:25px;padding:6px}.mobile-only{display:none}.drawer-overlay{position:fixed;inset:0;background:rgba(16,36,58,.35);z-index:10000}.drawer{position:fixed;top:0;bottom:0;width:min(430px,90vw);background:#fff;z-index:10001;box-shadow:0 0 50px rgba(16,36,58,.18);transition:transform .25s ease;overflow:auto}.drawer-right{right:0;transform:translateX(102%)}.drawer-left{left:0;transform:translateX(-102%)}.drawer.open{transform:translateX(0)}.drawer-head{height:72px;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:2}.drawer-brand img{height:38px}.close-btn{font-size:30px;line-height:1}.drawer-body{padding:18px}.drawer-group{padding:14px 0;border-bottom:1px solid #e9f0f8}.drawer-group h2{font-size:15px;margin:0 0 10px;color:var(--title)}.drawer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.drawer-links a,.mobile-home{padding:9px 11px;border-radius:10px;background:var(--soft2);color:var(--text);font-size:14px}.drawer-links a:hover,.mobile-home:hover{background:var(--soft);color:var(--blue2)}main{min-height:60vh}section{scroll-margin-top:90px}.hero{padding:58px 0 42px;position:relative;overflow:hidden}.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}.hero:before{width:260px;height:260px;right:4%;top:20px;background:rgba(47,123,255,.08)}.hero:after{width:180px;height:180px;left:-70px;bottom:0;background:rgba(110,184,255,.08)}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:46px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 11px;border-radius:999px;background:var(--soft);color:var(--blue2);font-size:13px;font-weight:700}.hero h1,.inner-hero h1{margin:14px 0 16px;color:var(--title);font-size:clamp(34px,4.5vw,58px);line-height:1.16;letter-spacing:-1.2px}.hero p,.inner-hero p{font-size:17px;color:var(--muted);margin:0 0 22px}.hero-actions{display:flex;gap:10px;flex-wrap:wrap}.hero-media,.image-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;padding:18px}.hero-media img,.image-card img{width:100%;height:auto;object-fit:contain}.summary-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:28px}.summary-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}.summary-item strong{display:block;color:var(--title);margin-bottom:4px}.summary-item span{color:var(--muted);font-size:13px}.section{padding:58px 0}.section.soft{background:var(--soft2)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}.section-head h2{margin:0;color:var(--title);font-size:clamp(25px,3vw,36px);line-height:1.25}.section-head p{margin:0;color:var(--muted);max-width:650px}.text-link{color:var(--blue2);font-weight:700}.scroller{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(210px,1fr);gap:12px;overflow:auto;padding:3px 1px 12px;scrollbar-width:thin}.quick-card,.card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:16px}.quick-card{padding:16px;min-height:145px}.quick-card .num{font-size:12px;color:var(--blue2);font-weight:800}.quick-card h3{margin:7px 0 5px;color:var(--title);font-size:17px}.quick-card p{margin:0;color:var(--muted);font-size:14px}.intro-strip{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;padding:24px 28px;border-radius:18px;background:linear-gradient(135deg,#eaf4ff,#fff);border:1px solid var(--line)}.intro-strip h2{margin:0 0 6px;color:var(--title)}.intro-strip p{margin:0;color:var(--muted)}.dual-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.feature-card{overflow:hidden}.feature-card img{width:100%;max-height:280px;object-fit:contain;background:#fff}.feature-body{padding:20px}.feature-body h3{margin:0 0 8px;color:var(--title);font-size:22px}.feature-body p{margin:0 0 12px;color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.topic-card{overflow:hidden}.topic-card img{width:100%;height:165px;object-fit:contain;background:#fff;padding:10px}.topic-card .body{padding:16px}.topic-card h3{margin:0 0 5px;color:var(--title);font-size:18px}.topic-card p{margin:0 0 10px;color:var(--muted);font-size:14px}.app-banner{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:center}.app-banner .image-card{padding:12px}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.info-card{padding:20px}.info-card h3{margin:0 0 8px;color:var(--title)}.info-card p{margin:0;color:var(--muted)}.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.review-card{padding:20px}.review-card .review-tag{font-size:12px;font-weight:800;color:var(--blue2)}.review-card p{margin:8px 0 0;color:var(--text)}.faq-list{display:grid;gap:12px}.faq-item{padding:18px 20px}.faq-item h3{margin:0 0 8px;color:var(--title);font-size:18px}.faq-item p{margin:0;color:var(--muted)}.notice{padding:20px 22px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:14px}.notice strong{color:var(--title)}.inner-hero{padding:48px 0 26px}.inner-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center}.inner-hero h1{font-size:clamp(32px,4vw,50px)}.inner-content{padding:16px 0 58px}.prose-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.prose-card{padding:24px}.prose-card h2,.prose-card h3{color:var(--title);margin-top:0}.prose-card p{margin:0 0 14px;color:var(--text)}.prose-card p:last-child{margin-bottom:0}.side-stack{display:grid;gap:16px}.mini-list{display:grid;gap:10px}.mini-list a{padding:11px 13px;background:var(--soft2);border-radius:10px;color:var(--title)}.mini-list a:hover{background:var(--soft);color:var(--blue2)}.feedback-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.feedback{padding:18px}.feedback strong{display:block;color:var(--title);margin-bottom:6px}.feedback p{margin:0;color:var(--muted)}.qa-block{margin-top:18px}.qa-block .faq-item{box-shadow:none}.usage-steps{counter-reset:step;display:grid;gap:10px}.usage-steps li{list-style:none;padding:14px 14px 14px 52px;background:var(--soft2);border-radius:12px;position:relative}.usage-steps li:before{counter-increment:step;content:counter(step);position:absolute;left:14px;top:14px;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-size:13px;font-weight:800}.site-footer{background:var(--footer);color:var(--footerText);padding:50px 0 26px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:28px}.footer-brand img{height:42px;width:auto;margin-bottom:12px;filter:brightness(0) invert(1)}.site-footer h2{font-size:15px;margin:0 0 10px;color:#fff}.site-footer p{margin:0;color:#c4d7ea;font-size:14px}.site-footer a{display:block;color:#dbe8f5;margin:7px 0;font-size:14px}.site-footer a:hover{color:#fff}.footer-bottom{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:12px;color:#a9bfd4;font-size:13px}.mobile-bottom-nav{display:none}
@media(max-width:1020px){.core-nav{gap:2px}.nav-pill{padding:8px 10px}.overview-btn{padding:9px 8px}.topic-grid{grid-template-columns:repeat(3,1fr)}.hero-grid,.inner-grid,.app-banner,.prose-grid{grid-template-columns:1fr}.hero-media{max-width:720px}.summary-row{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){body{padding-bottom:67px}.container{width:min(100% - 24px,1220px)}.desktop-only{display:none!important}.mobile-only{display:flex}.topbar{height:64px;grid-template-columns:42px 1fr auto;gap:10px}.brand-logo{justify-self:center}.brand-logo img{height:36px;max-width:150px}.header-actions{justify-self:end}.login-btn{padding:8px 14px;font-size:14px}.hero{padding:32px 0 28px}.hero-grid{gap:22px}.hero h1,.inner-hero h1{font-size:34px}.hero p,.inner-hero p{font-size:15px}.hero-media,.image-card{padding:10px;border-radius:16px}.summary-row{grid-template-columns:repeat(2,1fr);gap:9px}.summary-item{padding:13px}.section{padding:40px 0}.section-head{align-items:start;flex-direction:column;margin-bottom:18px}.section-head h2{font-size:27px}.intro-strip{grid-template-columns:1fr;padding:20px}.dual-grid,.info-grid,.review-grid,.feedback-list{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,1fr);gap:10px}.topic-card img{height:130px}.topic-card .body{padding:13px}.topic-card h3{font-size:16px}.topic-card p{font-size:13px}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;height:60px;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-top:1px solid var(--line);z-index:9998;display:grid;grid-template-columns:repeat(4,1fr);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom-nav a{display:grid;place-items:center;color:var(--title);font-size:13px}.mobile-bottom-nav a:hover{color:var(--blue2);background:var(--soft2)}.inner-hero{padding-top:30px}.prose-card{padding:19px}.drawer{width:min(88vw,390px)}}