:root{--ink:#173b37;--green:#12695b;--mint:#eaf5f0;--muted:#647c76;--line:#dfebe6;--paper:#f8fbf9;--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:white;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #38a891;outline-offset:4px}h1,h2,h3,p{margin:0}p{line-height:1.9}ul,ol{margin:0;padding:0}.container{width:min(1180px,calc(100% - 64px));margin:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:8px;transform:translateY(-150%);padding:12px;background:var(--green);color:white;z-index:10}.skip-link:focus{transform:translateY(0)}.site-header{position:sticky;top:0;z-index:5;background:#ffffffed;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-inner{min-height:88px;display:flex;align-items:center;gap:28px}.brand{display:flex;gap:11px;align-items:center;font-weight:700;font-size:21px;flex-shrink:0;line-height:1.3}.brand-mark{width:40px;height:40px;background:var(--green);border-radius:11px;display:grid;place-items:center;color:white;font-size:29px;font-weight:400}.brand small{display:block;font-size:9px;letter-spacing:2.5px;color:var(--muted);margin-top:5px;font-weight:500}.main-nav{display:flex;gap:29px;margin-left:auto;font-size:14px}.main-nav a{padding:12px 0;color:#4c6860}.main-nav a:hover,.main-nav a[aria-current]{color:var(--green)}.main-nav a[aria-current]{box-shadow:inset 0 -2px var(--green)}.button{display:inline-flex;align-items:center;justify-content:center;gap:14px;font-size:14px;font-weight:600;border:1px solid var(--green);color:var(--green);padding:15px 23px;border-radius:9px;white-space:nowrap;cursor:pointer;transition:background .15s,transform .15s}.button:hover{background:var(--mint)}.button.primary{background:var(--green);color:white}.button.primary:hover{background:#095347}.button.compact{padding:11px 17px;font-size:13px;margin-left:14px}.button.light{background:white;color:var(--green);border-color:white}.text-link{display:inline-block;font-size:14px;color:var(--green);font-weight:600;line-height:1.8}.text-link:hover{text-decoration:underline;text-underline-offset:5px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:1.6px;color:var(--green);line-height:1.8}.dot{display:inline-block;background:#259778;border-radius:50%;width:7px;height:7px;margin-right:9px;vertical-align:middle}.hero{background:radial-gradient(ellipse at 84% 40%,#e6f4eb 0%,transparent 60%),linear-gradient(130deg,#f8fcf9,#f1f7f4)}.hero-grid{display:grid;grid-template-columns:1.16fr 1fr;gap:70px;align-items:center;padding-top:82px;padding-bottom:83px}.hero h1{font-size:52px;line-height:1.35;letter-spacing:-1.6px;font-weight:700;margin:18px 0 21px}.hero h1 span{color:var(--green)}.hero-lead{font-size:15px;color:#5b746b;max-width:525px;line-height:2}.start-form{display:flex;gap:10px;margin-top:30px}.input-wrap{display:flex;align-items:center;gap:10px;border:1px solid #c8ddd2;border-radius:9px;background:white;flex:1;min-width:0;padding:0 13px}.input-wrap>span{font-size:21px;color:var(--green)}.input-wrap input{width:100%;min-width:0;border:0;background:transparent;padding:17px 0;font-size:13px;color:var(--ink)}.input-wrap input::placeholder{color:#7d9288}.start-form .button{padding:15px 18px;font-size:13px}.hero-note{font-size:11px;color:var(--muted);margin:12px 0 17px}.hero-note span{padding:0 7px;color:#a8bcb2}.hero-copy>.text-link{font-size:12px}.hero-visual{background:#ffffffd9;border:1px solid #cdded3;box-shadow:0 25px 70px #29664c12;border-radius:20px;padding:25px;transform:rotate(-1deg)}.visual-heading{display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:600;margin-bottom:22px;gap:12px}.illustration-label{font-size:10px;color:var(--muted);background:var(--paper);border:1px solid var(--line);padding:4px 8px;border-radius:6px;white-space:nowrap;font-weight:400}.browser-bar{display:flex;justify-content:space-between;gap:15px;background:#f1f6f3;border:1px solid var(--line);border-radius:9px;padding:11px 13px;font-size:11px;color:var(--muted)}.browser-bar span:first-child{color:#c1d5c8;font-size:8px;white-space:nowrap;line-height:1.8}.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin:16px 0 22px}.check-grid>div{padding:18px 16px;border:1px solid var(--line);border-radius:10px;background:#fcfefd}.check-icon{display:inline-grid;place-items:center;color:var(--green);background:var(--mint);width:30px;height:30px;border-radius:8px;font-size:22px;margin-bottom:11px}.check-grid h2{font-size:14px;line-height:1.6;margin-bottom:7px}.check-grid p{font-size:11px;color:var(--muted)}.visual-flow{display:flex;align-items:center;justify-content:space-between;gap:7px;font-size:10px;white-space:nowrap;color:var(--green);font-weight:600}.visual-flow span{padding:7px 10px;background:var(--mint);border-radius:6px}.visual-flow b{font-weight:400;color:#7aa491}.visual-note{text-align:center;font-size:10px;color:var(--muted);margin-top:17px}.service-strip{border-bottom:1px solid var(--line)}.strip-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:27px 0}.strip-grid p{display:flex;align-items:center;justify-content:center;gap:16px;border-right:1px solid var(--line)}.strip-grid p:first-child{justify-content:flex-start}.strip-grid p:last-child{border:0}.strip-grid strong{font-size:24px;letter-spacing:-.5px}.strip-grid span{font-size:11px;color:var(--muted)}.section{padding-top:76px;padding-bottom:76px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:25px;margin-bottom:32px}.section-heading h2{font-size:30px;line-height:1.5;letter-spacing:-.5px;margin-top:9px}.section-heading p{font-size:14px;color:var(--muted);margin-top:11px}.section-heading>.text-link{font-size:13px;white-space:nowrap;margin-bottom:7px}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.feature-card{position:relative;border:1px solid var(--line);border-radius:var(--radius);padding:29px 24px;transition:border-color .2s,transform .2s;background:white}.feature-card:hover{border-color:#84b8a5;transform:translateY(-3px)}.card-number{display:inline-block;font-size:26px;color:#adc7b9;font-weight:400;margin-bottom:22px}.card-tag{font-size:10px;color:var(--muted);margin-bottom:9px}.feature-card h3{font-size:19px;margin-bottom:12px;display:flex;align-items:center;justify-content:space-between;gap:10px}.feature-card h3 span{font-weight:400;font-size:20px;color:var(--green)}.feature-card p{font-size:13px;color:var(--muted);line-height:1.9}.card-link{display:block;font-size:11px;color:var(--green);margin-top:25px;font-weight:600}.tinted-section{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:65px;list-style:none;margin:40px 0 35px}.steps li{position:relative}.steps li>span{display:inline-grid;place-items:center;width:38px;height:38px;border:1px solid #b7d6c6;background:#eaf5ee;color:var(--green);font-size:12px;font-weight:600;border-radius:50%;margin-bottom:20px}.steps li:not(:last-child):after{content:"";position:absolute;top:19px;left:56px;width:calc(100% - 16px);height:1px;background:#d1e2d7}.steps h3{font-size:18px;margin-bottom:12px}.steps p{font-size:13px;color:var(--muted);max-width:300px}.editorial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:45px}.editorial-grid h3{font-size:18px;margin-bottom:16px;line-height:1.65}.editorial-grid p{font-size:14px;color:var(--muted);line-height:2}.reading-section{padding-bottom:25px}.rules-table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}.rules-table{width:100%;border-collapse:collapse;font-size:13px;line-height:1.85;text-align:left;min-width:660px}.rules-table thead{background:var(--paper)}.rules-table th,.rules-table td{padding:20px 24px;border-bottom:1px solid var(--line)}.rules-table tbody th{width:18%;font-weight:600;white-space:nowrap}.rules-table tbody td{color:var(--muted)}.rules-table tr:last-child>*{border-bottom:0}.small-note{font-size:12px;color:var(--muted);margin-top:14px}.rules-section{padding-bottom:25px}.faq-preview details{border-bottom:1px solid var(--line);padding:20px 0}.faq-preview summary{font-weight:600;font-size:15px;cursor:pointer;padding:5px 0;line-height:1.7}.faq-preview details p{font-size:14px;color:var(--muted);padding:14px 20px 0 0;max-width:900px}.cta{display:flex;gap:30px;align-items:center;justify-content:space-between;background:var(--green);color:white;border-radius:19px;padding:39px 45px;margin-top:10px;margin-bottom:75px}.cta .eyebrow{color:#b7dfce}.cta h2{font-size:27px;margin:8px 0 10px;line-height:1.5}.cta p{color:#d1e8df;font-size:13px}.site-footer{background:var(--paper);border-top:1px solid var(--line);padding-top:53px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:45px}.site-footer .brand{font-size:20px}.site-footer .brand-mark{width:36px;height:36px}.footer-grid>div>p{font-size:12px;color:var(--muted);margin-top:18px;line-height:2}.footer-grid nav h2{font-size:13px;margin-bottom:18px}.footer-grid nav a{display:block;color:var(--muted);font-size:12px;margin-bottom:13px;line-height:1.8}.footer-grid nav a:hover{color:var(--green);text-decoration:underline}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:22px 0 25px;margin-top:35px;font-size:10px;color:var(--muted);line-height:1.8}.page-hero{padding-top:32px;padding-bottom:44px}.breadcrumbs{display:flex;gap:13px;flex-wrap:wrap;font-size:12px;color:var(--muted);line-height:1.8;margin-bottom:44px}.breadcrumbs a:hover{text-decoration:underline}.page-hero h1{font-size:37px;line-height:1.5;letter-spacing:-1px;margin:12px 0 18px;max-width:930px}.page-lead{font-size:16px;color:var(--muted);line-height:2;max-width:860px}.article-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:70px;padding-top:20px;padding-bottom:35px}.page-outline{align-self:start;position:sticky;top:120px;max-height:calc(100vh - 145px);overflow-y:auto;padding-right:12px}.page-outline h2{font-size:13px;margin-bottom:19px}.page-outline ol{list-style:none;border-left:1px solid var(--line);padding-left:17px}.page-outline li{margin-bottom:14px}.page-outline a{font-size:12px;color:var(--muted);line-height:1.9}.page-outline a:hover{color:var(--green)}.outline-tip{margin-top:30px;border:1px solid var(--line);background:var(--paper);padding:21px;border-radius:12px}.outline-tip strong{font-size:13px}.outline-tip p{font-size:12px;color:var(--muted);margin:11px 0 15px}.outline-tip .text-link{font-size:12px;color:var(--green)}.article-section{position:relative;padding:0 0 30px;margin-bottom:30px;border-bottom:1px solid var(--line);scroll-margin-top:25px}.section-index{font-size:11px;letter-spacing:1px;color:var(--green);margin-bottom:9px}.article-section h2{font-size:23px;line-height:1.6;margin-bottom:15px}.article-section p{font-size:15px;line-height:2.15;color:#526f64}.article-section .text-link{margin-top:16px;font-size:13px}.article-list{padding-left:20px;margin-top:16px;color:#526f64;font-size:14px;line-height:2}.article-list li{padding-left:4px;margin-bottom:6px}.related-section{border-top:1px solid var(--line);padding-top:45px}.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.related-card{border:1px solid var(--line);border-radius:13px;padding:22px}.related-card:hover{background:var(--paper);border-color:#a2caba}.related-card>span{font-size:10px;color:var(--muted)}.related-card h3{display:flex;justify-content:space-between;gap:10px;font-size:16px;line-height:1.8;margin:11px 0}.related-card h3 b{font-weight:400;color:var(--green)}.related-card p{font-size:12px;color:var(--muted)}.error-actions{display:flex;gap:15px;padding-bottom:100px}
@media(min-width:1500px){.hero-grid{padding-top:100px;padding-bottom:100px}.hero h1{font-size:58px}}@media(max-width:1100px){.main-nav{gap:20px}.header-inner{gap:18px}.hero-grid{gap:35px}.hero h1{font-size:44px}.hero-visual{padding:20px}.feature-card{padding:23px 19px}.feature-card h3{font-size:17px}.strip-grid p{gap:10px}.strip-grid span{font-size:10px}.article-layout{gap:40px;grid-template-columns:220px minmax(0,1fr)}.related-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:850px){.container{width:calc(100% - 40px)}.header-inner{flex-wrap:wrap;gap:10px;min-height:78px;padding:15px 0}.brand{font-size:19px}.main-nav{order:3;flex-basis:100%;justify-content:center;gap:35px;border-top:1px solid var(--line);padding-top:6px;margin-top:4px}.main-nav a{padding:7px 0;font-size:12px}.header-inner>.button{margin-left:auto}.hero-grid{grid-template-columns:1fr;gap:40px;padding-top:48px;padding-bottom:45px}.hero h1{font-size:44px;margin-top:15px}.hero-copy{max-width:620px}.hero-lead{max-width:600px}.start-form{max-width:600px}.hero-visual{max-width:540px;width:100%;justify-self:center;transform:none;padding:24px}.check-grid>div{padding:16px 20px}.visual-flow{justify-content:center;gap:18px;font-size:11px}.strip-grid strong{font-size:22px}.strip-grid p{flex-direction:column;gap:3px;text-align:center}.strip-grid p:first-child{justify-content:center}.strip-grid span{font-size:11px}.section{padding-top:48px;padding-bottom:48px}.section-heading h2{font-size:25px}.section-heading{align-items:flex-start}.feature-grid{grid-template-columns:repeat(2,1fr)}.feature-card{padding:24px}.feature-card h3{font-size:20px}.card-number{margin-bottom:16px}.steps{gap:30px}.steps h3{font-size:16px}.editorial-grid{grid-template-columns:1fr;gap:29px}.editorial-grid h3{margin-bottom:10px}.cta{padding:30px;margin-bottom:48px}.cta h2{font-size:23px}.footer-grid{gap:25px;grid-template-columns:1.3fr 1fr 1fr}.footer-grid>div{grid-column:1/-1;display:flex;justify-content:space-between;gap:20px;align-items:center}.footer-grid>div>p{margin:0}.page-hero h1{font-size:30px}.page-hero{padding-bottom:28px}.breadcrumbs{margin-bottom:27px}.article-layout{grid-template-columns:1fr;gap:30px}.page-outline{position:static;max-height:none;padding:22px;background:var(--paper);border:1px solid var(--line);border-radius:14px}.page-outline ol{columns:2;column-gap:25px}.page-outline li{break-inside:avoid}.outline-tip{display:none}.article-section h2{font-size:22px}.article-section p{font-size:14px}.reading-section,.rules-section{padding-bottom:20px}html{scroll-padding-top:165px}}@media(max-width:480px){.container{width:calc(100% - 32px)}.header-inner{padding:13px 0}.brand{font-size:18px}.brand-mark{width:34px;height:34px;font-size:25px}.brand small{font-size:8px;letter-spacing:2px}.button.compact{font-size:11px;padding:10px 12px;gap:8px}.main-nav{gap:0;justify-content:space-between;padding-top:7px}.hero-grid{padding-top:35px;gap:28px}.hero h1{font-size:37px;letter-spacing:-1px;line-height:1.45;margin-bottom:17px}.hero-lead{font-size:13px;line-height:2}.eyebrow{font-size:10px}.start-form{flex-direction:column;gap:9px;margin-top:23px}.input-wrap input{font-size:12px;padding:15px 0}.start-form .button{padding:14px 18px}.hero-note{font-size:10px;line-height:1.9}.hero-note span{padding:0 3px}.hero-visual{padding:18px;border-radius:15px}.visual-heading{font-size:11px;margin-bottom:17px}.check-grid{gap:9px;margin-bottom:17px}.check-grid>div{padding:15px 12px}.check-grid h2{font-size:13px}.check-grid p{font-size:10px}.visual-flow{gap:5px;font-size:9px;justify-content:space-between}.visual-flow span{padding:7px 8px}.strip-grid{grid-template-columns:repeat(2,1fr);gap:20px 0;padding:24px 0}.strip-grid p:nth-child(2){border:0}.strip-grid strong{font-size:24px}.section{padding-top:38px;padding-bottom:38px}.section-heading{flex-direction:column;gap:12px;margin-bottom:24px}.section-heading h2{font-size:22px;line-height:1.6}.section-heading p{font-size:12px;line-height:1.9}.section-heading>.text-link{margin:0;font-size:12px}.feature-grid{grid-template-columns:1fr;gap:13px}.feature-card{padding:21px 23px}.card-number{font-size:21px;position:absolute;right:23px;top:18px;margin:0}.card-tag{font-size:10px;margin-top:2px;margin-bottom:14px}.feature-card h3{font-size:19px}.feature-card h3 span{display:none}.feature-card p{font-size:13px}.card-link{margin-top:16px}.steps{grid-template-columns:1fr;gap:24px;margin-top:27px;margin-bottom:28px}.steps li{padding-left:55px;min-height:80px}.steps li>span{position:absolute;left:0;top:0;width:34px;height:34px;margin:0}.steps li:not(:last-child):after{left:17px;top:46px;width:1px;height:calc(100% - 32px)}.steps h3{font-size:17px;margin-bottom:8px}.steps p{max-width:none;font-size:13px}.editorial-grid h3{font-size:17px}.editorial-grid p{font-size:13px;line-height:2.1}.rules-table th,.rules-table td{padding:17px}.rules-table{font-size:12px}.small-note{font-size:11px}.faq-preview summary{font-size:14px}.faq-preview details{padding:15px 0}.faq-preview details p{font-size:13px;padding-right:0}.cta{flex-direction:column;align-items:flex-start;gap:22px;border-radius:13px;padding:27px 24px;margin-top:4px;margin-bottom:38px}.cta h2{font-size:22px}.cta p{font-size:12px}.cta .button{width:100%}.footer-grid{grid-template-columns:repeat(2,1fr);gap:25px 20px}.footer-grid>div{display:block}.footer-grid>div>p{margin-top:14px}.footer-grid nav h2{font-size:12px;margin-bottom:14px}.footer-grid nav a{font-size:11px;margin-bottom:11px}.footer-bottom{flex-direction:column;gap:6px;margin-top:24px;font-size:9px}.site-footer{padding-top:32px}.page-hero{padding-top:22px;padding-bottom:24px}.breadcrumbs{font-size:10px;gap:9px;margin-bottom:23px}.page-hero h1{font-size:26px;letter-spacing:-.5px;line-height:1.6;margin:10px 0 13px}.page-lead{font-size:13px;line-height:2}.article-layout{gap:28px;padding-top:5px;padding-bottom:0}.page-outline{padding:20px}.page-outline ol{columns:1}.page-outline li{margin-bottom:10px}.page-outline h2{font-size:12px;margin-bottom:14px}.page-outline a{font-size:12px}.article-section{padding-bottom:25px;margin-bottom:25px}.article-section h2{font-size:20px;line-height:1.65}.article-section p{font-size:13px;line-height:2.1}.article-list{font-size:12px}.related-grid{grid-template-columns:1fr;gap:12px}.related-card{padding:20px}.related-card h3{font-size:16px}.related-card p{font-size:12px}.error-actions{flex-direction:column;padding-bottom:50px}.reading-section,.rules-section{padding-bottom:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}