*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;overflow-wrap:anywhere}
img{max-width:100%;height:auto}
a{color:inherit}
.nt{position:absolute;opacity:0;pointer-events:none}
.burger{display:none;cursor:pointer;width:44px;height:44px;align-items:center;justify-content:center}
.burger span,.burger span::before,.burger span::after{display:block;width:22px;height:2px;background:currentColor;content:"";position:relative}
.burger span::before{position:absolute;top:-7px}.burger span::after{position:absolute;top:7px}
.tbl{overflow-x:auto}table{border-collapse:collapse;width:100%}
details>summary{cursor:pointer;list-style:none}details>summary::-webkit-details-marker{display:none}
@media (max-width:820px){.burger{display:flex}.nav{display:none}.nt:checked~.nav{display:flex}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
body{background:var(--bg);color:var(--ink);font:16px/1.85 var(--ft)}
.wrap{max-width:var(--ww,1080px);margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{width:38px;height:38px;flex:none}
.brand b{display:block;font-size:18px;letter-spacing:2px;line-height:1.2}
.brand i{display:block;font-style:normal;font-size:11px;color:var(--mut);line-height:1.2}
.nav a{text-decoration:none;color:var(--mut)}
.nav a:hover,.nav a[aria-current]{color:var(--ink)}
.btn{display:inline-block;padding:12px 26px;border-radius:999px;background:var(--acc);color:var(--onacc,#fff);font-weight:700;text-decoration:none;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.article{max-width:var(--aw,780px);margin:0 auto;padding:36px 20px 72px}
.crumbs{font-size:13px;color:var(--mut);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.crumbs a{text-decoration:none}
.article h1{font-size:clamp(26px,4vw,36px);line-height:1.35;margin:0 0 10px}
.meta{color:var(--mut);font-size:13px;margin:0 0 24px}
.prose h2{font-size:23px;line-height:1.4;margin:2em 0 .6em}
.prose h3{font-size:18px;margin:1.6em 0 .4em}
.prose p{margin:.9em 0}
.prose ul,.prose ol{padding-left:1.3em}.prose li{margin:.35em 0}
.prose a{color:var(--acc2);text-underline-offset:3px}
.lede{font-size:18px}
.steps{counter-reset:s;list-style:none;padding:0!important}
.steps li{counter-increment:s;position:relative;padding:16px 16px 16px 66px;margin:12px 0;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.steps li::before{content:counter(s);position:absolute;left:16px;top:16px;width:34px;height:34px;border-radius:50%;background:var(--acc);color:var(--onacc,#fff);display:grid;place-items:center;font-weight:700}
.steps b{display:block}.steps span{color:var(--mut)}
.tbl{border:1px solid var(--line);border-radius:var(--r);margin:1.2em 0}
th,td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:15px;vertical-align:top}
tbody tr:last-child>*{border-bottom:0}
thead th{background:var(--card);white-space:nowrap}
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--acc);border-radius:var(--r);padding:14px 18px;margin:1.4em 0}
.cta-row{margin:24px 0}.cta-row small{display:block;margin-top:8px;color:var(--mut)}
.faq details{border:1px solid var(--line);border-radius:var(--r);margin:10px 0;background:var(--card)}
.faq summary{padding:14px 18px;font-weight:600}
.faq summary::after{content:"+";float:right;color:var(--acc2)}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:0;padding:0 18px 16px;color:var(--mut)}
.kv div{display:grid;grid-template-columns:150px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.kv dt{font-weight:700;color:var(--acc2)}.kv dd{margin:0}
.endcta{margin-top:44px;padding:24px;border-radius:var(--r);background:var(--card);border:1px solid var(--line);text-align:center}
.endcta p{margin:.3em 0}
.related{margin-top:40px}.related h2{font-size:20px}
.related ul{list-style:none;padding:0}.related li{padding:12px 0;border-bottom:1px solid var(--line)}
.related a{font-weight:700;display:block;text-decoration:none}.related a:hover{color:var(--acc2)}
.related span{color:var(--mut);font-size:14px}
.site-footer{border-top:1px solid var(--line);padding:34px 0;color:var(--mut);font-size:14px}
.site-footer p{margin:.5em 0}.site-footer a{color:var(--ink)}
.fnav{display:flex;gap:18px;flex-wrap:wrap;margin:10px 0}
.toc{display:none}
@media (max-width:820px){.kv div{grid-template-columns:1fr;gap:2px}.steps li{padding-left:58px}}
:root{--bg:#f3faf9;--card:#fff;--ink:#0f2a2e;--mut:#4f6b6e;--line:#cfe5e2;--acc:#0f766e;--acc2:#115e59;--onacc:#fff;--r:12px;--aw:760px;--ww:1120px;--ft:"Microsoft YaHei","PingFang SC","Noto Sans SC",system-ui,sans-serif}
.site-header{background:#0b3b3a;color:#e6fffb;position:sticky;top:0;z-index:20}
.site-header .wrap{display:flex;align-items:center;gap:16px;min-height:60px}
.site-header .brand b,.site-header .brand i{color:#e6fffb}
.shell-top .nav{display:flex;gap:18px;margin-left:auto;font-size:14px}
.shell-top .nav a{color:#9fe0d6}.shell-top .nav a:hover,.shell-top .nav a[aria-current]{color:#fff}
.shell-top .nav a[aria-current]{border-bottom:2px solid #5eead4}
.hd-cta .btn{background:#5eead4;color:#0b3b3a;padding:7px 16px;font-size:14px}
.split{display:grid;grid-template-columns:1fr 1fr;min-height:420px}
.split .l{background:linear-gradient(140deg,#0b3b3a,#0f766e);color:#e6fffb;padding:60px 44px 60px max(20px,calc((100vw - 1120px)/2 + 20px))}
.split .r{background:#ece9ff;padding:60px max(20px,calc((100vw - 1120px)/2 + 20px)) 60px 44px;display:grid;align-content:center;gap:12px}
.split h1{font-size:clamp(30px,4.6vw,46px);line-height:1.2;margin:0 0 14px}
.split .l p{color:#b8efe7;font-size:17px;margin:0 0 24px}
.split .l .btn{background:#5eead4;color:#0b3b3a}
.gauge{background:#fff;border:1px solid #d8d3ff;border-radius:var(--r);padding:12px 16px}
.gauge b{display:flex;justify-content:space-between;font-size:14px;color:#3a2f8f}
.gauge i{display:block;height:8px;border-radius:99px;background:#e6e2ff;margin-top:8px;overflow:hidden}
.gauge i::after{content:"";display:block;height:100%;width:var(--w);background:linear-gradient(90deg,#6d5df0,#0f766e);border-radius:inherit;animation:grow 1.6s ease-out both}
@keyframes grow{from{width:0}}
.r small{color:#6c63b8;font-size:12px}
.sec{padding:44px 0}.sec h2{font-size:26px;margin:0 0 6px}.sec .lead{color:var(--mut);margin:0 0 20px}
.cmp{width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.cmp th{background:#e0f4f1;font-size:14px}.cmp td,.cmp th{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;font-size:15px}
.cmp tr:last-child td,.cmp tr:last-child th{border-bottom:0}.cmp .you{color:var(--acc2);font-weight:700}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;list-style:none;padding:0;margin:0}
.cards a{display:block;height:100%;background:#fff;border:1px solid var(--line);border-top:4px solid var(--acc);border-radius:var(--r);padding:16px;text-decoration:none}
.cards a:hover{border-top-color:#6d5df0}
.cards b{display:block;margin-bottom:4px}.cards span{font-size:13px;color:var(--mut)}
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:30;display:none;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:#0b3b3a;color:#e6fffb;box-shadow:0 -6px 20px rgba(0,0,0,.2)}
.sticky-cta .btn{background:#5eead4;color:#0b3b3a;padding:9px 20px}
.article{padding-bottom:96px}.th-note{font-size:13px;color:var(--mut)}
@media (max-width:820px){.split{grid-template-columns:1fr}.split .l,.split .r{padding:36px 16px}.cards{grid-template-columns:1fr 1fr}.sticky-cta{display:flex}.hd-cta{display:none}.site-header .wrap{flex-wrap:wrap;padding-top:6px}.burger{margin-left:auto}.shell-top .nav{display:none;width:100%;flex-direction:column;gap:2px;margin:0;padding-bottom:8px}.shell-top .nav a{padding:9px 2px}}