:root{--ink:#162c26;--ink2:#60716a;--brand:#0c8f5a;--brand-ink:#086d44;--paper:#f7f9f6;--line:#e0e8e2;--text:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;color:var(--ink);background:#fff;font:16px/1.75 var(--text);-webkit-font-smoothing:antialiased}a{color:var(--brand-ink);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}img{max-width:100%;height:auto}html[data-lang="zh"] [lang="en"]:not(html),html[data-lang="en"] [lang="zh-Hans"]:not(html){display:none!important}
.w{width:100%;max-width:1160px;margin:auto;padding:0 32px}.gnav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(18px);font-size:14px;letter-spacing:normal}.gnav .w{height:auto;min-height:80px;display:flex;align-items:center;gap:32px}.glogo{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:18px;font-weight:700;white-space:nowrap}.glogo img{width:32px;height:32px;border-radius:9px}.glogo small{display:block;color:var(--ink2);font-size:10px;font-weight:400;letter-spacing:3px;line-height:1.2;margin:0}.glogo:hover{text-decoration:none}.glinks{display:flex;flex:1;justify-content:flex-end;gap:30px}.glinks a{color:var(--ink2);padding:8px 0}.glinks a[aria-current="page"]{color:var(--brand-ink);font-weight:600}.switch{display:inline-flex;background:var(--paper);padding:3px;border:1px solid var(--line);border-radius:9px}.switch button{border:0;background:transparent;color:var(--ink2);border-radius:6px;padding:5px 9px;cursor:pointer;font-size:12px}.switch button[aria-pressed="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 4px #163d2010}.skip-link{position:fixed;left:16px;top:-90px;z-index:100;background:var(--ink);color:#fff;padding:8px 20px;border-radius:8px}.skip-link:focus{top:8px}:focus-visible{outline:3px solid #258358;outline-offset:5px}main{min-height:40vh}.site-footer{background:var(--paper);padding:44px 0 24px;border-top:1px solid var(--line);color:var(--ink2);font-size:12px}.footer-top,.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px}.footer-top{padding-bottom:30px}.footer-top p{margin:0;font-size:14px}.footer-bottom{padding-top:22px;border-top:1px solid var(--line)}.footer-links{display:flex;gap:24px}.footer-links a,.icp a{color:var(--ink2)}.icp{margin-top:18px;font-size:12px}.hero:not(.landing-hero){padding:64px 0 48px;background:var(--paper)}.hero:not(.landing-hero) img{width:64px;height:64px;border-radius:16px;box-shadow:none}.hero:not(.landing-hero) h1{font-size:clamp(32px,5vw,48px);font-weight:650}.narrow{max-width:860px}.hero .search{background:#fff}.topics{scroll-margin-top:90px}section[id]{scroll-margin-top:100px}.toc,.keypoints{background:var(--paper)}
.landing-hero{padding:82px 0 74px;background:var(--paper);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:64px}.eyebrow{font-size:11px;font-weight:600;letter-spacing:2.2px;color:var(--brand-ink);margin:0 0 24px}.landing-hero h1{font-size:clamp(38px,4.6vw,62px);line-height:1.2;letter-spacing:-2px;margin:0 0 26px;font-weight:650}.landing-hero h1 em{font-style:normal;color:var(--brand)}.intro-text{max-width:440px;color:var(--ink2);font-size:16px;line-height:1.9;margin:0 0 32px}.actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap}.primary{display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:12px;padding:13px 22px;background:var(--brand-ink);color:#fff;font-size:14px;font-weight:600}.primary:hover{background:#095737;text-decoration:none}.secondary{font-size:14px}.fine-print{font-size:12px;color:var(--ink2);margin-top:24px}.hero-visual{position:relative;display:flex;justify-content:center;padding:20px 0}.phone{width:218px;border:6px solid #20372e;background:#fff;border-radius:33px;overflow:hidden;box-shadow:0 30px 55px -30px #173e3a70;transform:rotate(-5deg)}.phone img{display:block;width:100%}.phone.back{position:absolute;left:54%;top:58px;width:192px;transform:rotate(10deg);border-color:#668777}.phone.front{position:relative;margin-right:100px}.visual-tag{position:absolute;bottom:8px;left:14px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:14px 18px;box-shadow:0 12px 28px #173e3a0a;font-size:12px}.visual-tag b{color:var(--brand);font-size:18px}.visual-tag small{display:block;color:var(--ink2);font-size:10px}.benefits{display:flex;justify-content:center;gap:60px;padding:23px 0;border-bottom:1px solid var(--line);font-size:12px;color:var(--ink2)}.benefits span:before{content:"✓";color:var(--brand);margin-right:9px}.section{padding:88px 0}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:36px}.section h2{font-size:clamp(28px,3.2vw,38px);line-height:1.35;letter-spacing:-1px;font-weight:600;margin:0}.section-heading p{color:var(--ink2);max-width:345px;font-size:14px;margin:0}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.feature{padding:30px;border-radius:18px;border:1px solid var(--line);background:#fff}.feature .number{font-size:12px;color:var(--brand);letter-spacing:1px}.feature h3{font-size:19px;margin:28px 0 12px;font-weight:600}.feature p{font-size:14px;color:var(--ink2);line-height:1.9;margin:0}.soft{background:var(--paper)}.privacy-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}.privacy-copy p{font-size:14px;color:var(--ink2);margin:22px 0}.privacy-list{border-top:1px solid var(--line)}.privacy-list div{padding:19px 0;border-bottom:1px solid var(--line);display:flex;gap:18px}.privacy-list strong{color:var(--brand);font-weight:400}.privacy-list h3{font-size:15px;margin:0;font-weight:600}.privacy-list p{font-size:12px;margin:4px 0 0;color:var(--ink2)}.help-strip{display:flex;align-items:center;justify-content:space-between;gap:30px}.help-strip p{font-size:14px;color:var(--ink2);margin:16px 0 0}.help-strip h2{font-size:30px}.search{max-width:100%}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}