:root{--paper:#F3F8FD;--deep:#DCEAF6;--white:#FFFFFF;--navy:#0E3A5C;--text:#24384C;--muted:#5A7388;--aux:#7A93A8;--sky:#5BA3D0;--tide:#3D7EA6;--mist:#C5E4F5;--sand:#E8C9A0;--border:rgba(14,58,92,.12);--shadow:0 14px 34px rgba(14,58,92,.10);--max:1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.8 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-header{position:fixed;z-index:50;left:0;right:0;top:0}.tide-line{height:28px;background:var(--tide);color:#fff;font-size:12px}.top-inner{max-width:var(--max);height:100%;margin:auto;padding:0 18px;display:flex;align-items:center;justify-content:space-between;gap:16px}.text-control{border:0;background:transparent;color:#fff;min-height:28px;cursor:pointer}.tide-stage{height:50px;background:#fff;border-bottom:1px solid var(--mist)}.stage-inner{height:50px}.brand-link{display:flex;align-items:center;min-height:44px}.brand-logo{display:block;max-height:26px;max-width:190px;object-fit:contain}.brand-text{font-size:20px;font-weight:800;color:var(--navy)}.stage-actions{display:flex;gap:8px}.stage-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border:1px solid var(--sky);border-radius:10px;background:#fff;color:var(--navy);cursor:pointer}.stage-btn.primary{background:var(--tide);color:#fff;border-color:var(--tide)}.tide-bridge{height:64px;background:var(--mist);display:grid;grid-template-columns:repeat(5,1fr);border-bottom:1px solid var(--border)}.tide-bridge a{display:flex;align-items:center;justify-content:center;color:var(--navy);font-weight:700;border-right:1px solid rgba(255,255,255,.8)}.tide-bridge a:last-child{border-right:0}.tide-bridge a.is-active{background:#fff}.site-main{max-width:var(--max);margin:0 auto;padding:174px 18px 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h3{color:var(--navy);font-size:18px;margin:18px 0 6px}.content-card ul,.content-card ol{padding-left:1.25em}.content-card li{margin:.45em 0}.side-note{background:var(--navy);color:var(--mist);border-radius:12px;padding:20px;align-self:start;position:sticky;top:164px}.side-note h2{margin-top:0;color:#fff}.side-note a{display:block;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.14)}.qa-list{display:grid;gap:14px}.qa-item{background:#fff;border:1px solid var(--border);border-radius:12px;padding:20px}.qa-item h2{font-size:19px;color:var(--navy);margin:0 0 8px}.site-footer{background:var(--navy);color:var(--mist);padding:42px 18px 84px}.footer-inner{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.25fr 2fr;gap:38px}.footer-logo-wrap{display:flex;align-items:center;gap:12px;color:#fff}.footer-logo{max-height:26px;max-width:170px;object-fit:contain}.footer-logo-wrap span{display:grid}.footer-logo-wrap 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