.whitepaper-page{--bg:#080f16;--panel:#0d1a25;--border:#253744;--muted:#a0b5c4;--mint:#70e7cc;background:var(--bg);font-family:"Avenir Next","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
.whitepaper-page .skip-link{position:absolute;top:-100px;left:16px;z-index:10;padding:12px 18px;background:var(--mint);color:#082b25;border-radius:8px}.whitepaper-page .skip-link:focus{top:12px}
.whitepaper-page .portal-header{max-width:1280px}.whitepaper-page .portal-header nav a[aria-current=page]{color:var(--mint)}
.whitepaper-page .portal-main{max-width:1180px}.whitepaper-page .paper-hero{grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr);gap:72px;padding:24px 0 28px}
.whitepaper-page .paper-hero>div{min-width:0}.whitepaper-page .paper-hero h1{font-size:clamp(36px,4.2vw,52px);font-weight:550;line-height:1.28;margin:22px 0}
.paper-hero .lead{font-size:16px;line-height:1.9;max-width:550px}.paper-meta{display:flex;flex-wrap:wrap;gap:10px 20px;font-size:12px;color:#bfd0db;margin-top:25px}.paper-meta>span,.paper-meta>time{white-space:nowrap}.paper-version{font-size:12px;color:var(--muted);margin:10px 0 24px}
.paper-cover{margin:0;padding:20px;border:1px solid var(--border);border-radius:14px;background:linear-gradient(145deg,#153137,#0d1a25);transform:rotate(2deg)}.paper-cover img{display:block;width:100%;height:auto;border-radius:3px;box-shadow:0 12px 24px #0005}.paper-cover figcaption{font-size:10px;color:#b4cbd4;text-align:center;margin-top:16px;line-height:1.7}
.whitepaper-page .button{border-radius:9px;font-weight:550;line-height:1.6}.whitepaper-page .caption{line-height:1.8;max-width:660px}
.whitepaper-page .paper-update{border-radius:14px;background:#0d1c25;border-color:#335059;padding:26px 30px}.update-heading{display:flex;align-items:center;gap:24px;flex-wrap:wrap}.update-heading h2{font-size:20px;font-weight:550;margin:0}.paper-update>p{font-size:13px;color:#c1d0d8;margin:14px 0}.paper-update code{display:block;font-size:13px;background:#08131b;border:1px solid #243d47;border-radius:8px;padding:13px 16px;overflow-wrap:anywhere;word-break:break-all}.update-links{display:flex;align-items:center;gap:24px;margin-top:16px}.update-links .button{flex-shrink:0;font-size:12px}.update-links p{color:var(--muted);font-size:12px;margin:0}
.paper-chapters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.paper-chapters>a{display:flex;flex-direction:column;padding:26px;border-radius:14px;background:#0d1a25;transition:border-color .18s}.paper-chapters>a:hover{border-color:#70b6a3;color:var(--text)}.chapter-page{font-size:12px;color:#9bb8c4}.paper-chapters h3{font-size:21px;font-weight:550;margin:16px 0 10px}.paper-chapters p{font-size:13px;color:var(--muted);margin:0 0 22px}.chapter-action{font-size:12px;color:var(--mint);margin-top:auto}
.paper-next{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:30px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.paper-next h2{font-size:24px;font-weight:550;line-height:1.5;margin:12px 0}.paper-next p:not(.eyebrow){font-size:14px;color:var(--muted);margin:0}.paper-next .button{flex-shrink:0}.paper-archive{color:var(--muted);font-size:12px;margin-top:26px}.paper-archive summary{cursor:pointer;padding:10px 0}.paper-archive summary:focus-visible{outline:2px solid var(--mint);outline-offset:4px}.paper-archive a{color:var(--mint);display:inline-flex;padding:10px 0}
@media(max-width:900px){.whitepaper-page .paper-hero{gap:32px}.whitepaper-page .portal-header{flex-wrap:wrap;gap:18px}.whitepaper-page .portal-header nav{order:3;width:100%;flex-wrap:wrap;justify-content:flex-start;gap:12px 22px}.whitepaper-page .portal-header select{max-width:140px}}
@media(max-width:650px){.whitepaper-page .paper-hero{grid-template-columns:1fr;gap:28px}.whitepaper-page .paper-hero h1{font-size:36px}.paper-cover{display:none}.paper-chapters{grid-template-columns:1fr}.whitepaper-page .paper-update{padding:22px 18px}.update-heading{gap:8px}.update-heading .eyebrow{width:100%}.update-links{align-items:flex-start;flex-direction:column;gap:14px}.paper-next{align-items:flex-start;flex-direction:column}.paper-hero .actions{align-items:stretch}.paper-hero .actions .button{flex:1;min-width:130px}.paper-hero .lead{font-size:15px}.whitepaper-page .portal-header nav{font-size:12px;gap:12px 18px}}
@media(prefers-reduced-motion:reduce){.paper-chapters>a{transition:none}}
@media(max-width:480px){.paper-hero .actions{display:grid;grid-template-columns:1fr}.paper-hero .actions .button{white-space:nowrap;font-size:13px}}