:root{color-scheme:light;--blue:#2463eb;--ink:#162c50;--muted:#71809a;--line:#e1e9f5}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 85% 0,#dbeaff 0,transparent 45%),#f3f7fc;color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.6}a{color:var(--blue);text-decoration:none}button,input,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible{outline:3px solid #61a2ff;outline-offset:4px}.topbar{height:86px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #ffffffcc;background:#ffffffaa;backdrop-filter:blur(20px);padding:0 5vw}.brand{font-size:24px;display:flex;gap:10px;align-items:center;color:var(--blue)}.brand b{color:var(--ink)}.brand span{font-size:14px;letter-spacing:2px}.shell{max-width:1440px;margin:auto;display:flex;gap:44px;padding:44px 5vw}aside{width:205px;flex-shrink:0}aside 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0}label{font-size:14px;color:var(--ink);display:block;margin-bottom:8px}input:not([type=checkbox]):not([type=hidden]),textarea{width:100%;border:1px solid #d7e2f1;background:#f9fbff;border-radius:10px;padding:12px 14px;color:var(--ink);outline:none}input:focus,textarea:focus{border-color:#6497f3;box-shadow:0 0 0 3px #2161d815}input[type=checkbox]{width:17px;height:17px;accent-color:var(--blue)}textarea{resize:vertical}.helptext{display:block;font-size:12px;color:var(--muted);margin-top:8px}.helptext ul{padding-left:18px}.errorlist{padding:12px 20px;background:#fff0ef;color:#a33c36;border-radius:10px;font-size:13px;list-style:none}.form-links{display:flex;justify-content:space-between;gap:18px;margin-top:22px;font-size:14px}dl{display:grid;grid-template-columns:120px 1fr;gap:14px;font-size:14px;margin:28px 0}dt{color:var(--muted)}dd{margin:0;overflow-wrap:anywhere}.inline-form{display:inline-block;margin-left:24px}.ticket,.announcement{border-top:1px solid var(--line);padding:20px 0;overflow-wrap:anywhere}.ticket p{white-space:normal}.ticket small{color:var(--muted)}.reply{padding:18px;background:#f0f6ff;border-radius:12px;margin-top:18px}.platform-symbol{font-size:38px;color:var(--blue)}@media(min-width:1400px){.pricing-grid{grid-template-columns:repeat(4,1fr)}.price-card{padding:24px 20px}}@media(max-width:850px){.shell{gap:25px;padding:25px 4vw}aside{width:165px}.stats{grid-template-columns:1fr}.stats .card{margin:0}.stats{margin-bottom:24px}.auth-intro{display:none}.membership-art{display:none}h1{font-size:29px}}@media(max-width:600px){.topbar{height:70px}.shell{display:block;padding:20px 5vw}aside{width:100%;margin-bottom:25px}aside>.eyebrow,.identity{display:none}aside nav{display:flex;overflow-x:auto;gap:6px;padding-bottom:10px}aside nav a{white-space:nowrap;padding:9px 12px;font-size:13px}h1{font-size:28px}.membership-card{padding:26px}.membership-card h2{font-size:23px}.pricing-grid{grid-template-columns:1fr}.stats{grid-template-columns:1fr}.stats 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