:root{--navy:#06152f;--blue:#0d3268;--gold:#d7ae58;--paper:#f5f7fb;--ink:#11213b;--muted:#6d7c93}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 system-ui,"Microsoft YaHei",sans-serif}header{height:78px;padding:0 max(20px,5vw);background:linear-gradient(110deg,var(--navy),var(--blue));display:flex;align-items:center;justify-content:space-between;color:#fff}header a{color:inherit;text-decoration:none;display:flex;align-items:center;gap:12px}header img{width:50px;height:50px;object-fit:contain;background:#fff;border-radius:12px;padding:4px}header b,header small{display:block}header small{font-size:11px;color:#cbd6e6}header nav{display:flex;gap:28px}header nav a{color:#d7e0ee}header nav .active{color:var(--gold)}main{max-width:1240px;margin:auto;padding:44px 24px 90px}.hero{min-height:360px;border-radius:28px;padding:58px;background:radial-gradient(circle at 85% 20%,#8d4fc155,transparent 30%),linear-gradient(125deg,#071731,#0c3570);color:#fff;display:flex;flex-direction:column;justify-content:end;box-shadow:0 25px 70px #07173133}.hero small,.archive-head small{color:var(--gold);letter-spacing:.16em}.hero h1{font:700 clamp(34px,5vw,64px)/1.15 Georgia,"Microsoft YaHei";max-width:850px;margin:12px 0}.hero p{max-width:850px;color:#d7e0ed;font-size:18px;white-space:pre-line}.archive-head{display:flex;justify-content:space-between;align-items:end;margin:54px 0 18px}.archive-head h2{font-size:34px;margin:4px 0}.archive-head label{font-size:13px;color:var(--muted)}select{display:block;margin-top:5px;padding:10px 38px 10px 12px;border:1px solid #d8dfeb;border-radius:9px;background:white}.activity-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.activity{background:#fff;border:1px solid #e0e6ef;border-radius:18px;overflow:hidden;box-shadow:0 12px 35px #1c34500d}.cover{height:220px;background:linear-gradient(135deg,#102b59,#7252a1);display:grid;place-items:center;color:#fff;font:700 26px Georgia;overflow:hidden}.cover img{width:100%;height:100%;object-fit:cover}.activity-body{padding:20px}.activity-body small{color:#98711f;letter-spacing:.08em}.activity-body h3{font-size:23px;margin:6px 0}.activity-body p{color:var(--muted);margin:0}.media-strip{display:flex;gap:8px;padding:0 20px 20px;overflow:auto}.media-strip button{border:0;background:#e8edf5;border-radius:9px;width:70px;height:55px;flex:0 0 auto;overflow:hidden;padding:0}.media-strip img{width:100%;height:100%;object-fit:cover}.media-strip .video{display:grid;place-items:center;color:#fff;background:#152f5d}.loading,.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:50px}dialog{border:0;border-radius:16px;padding:0;background:#050b16;max-width:92vw;max-height:90vh}dialog::backdrop{background:#020713dd}#viewerBody img,#viewerBody video{display:block;max-width:88vw;max-height:84vh}#viewerBody iframe{width:min(900px,88vw);height:min(560px,70vh);border:0}#viewerClose{position:absolute;right:10px;top:8px;z-index:2;border:0;border-radius:50%;width:36px;height:36px;background:#fff;color:#111;font-size:24px}footer{text-align:center;background:var(--navy);color:#cbd5e3;padding:28px}@media(max-width:800px){header{height:auto;padding:12px 16px;align-items:flex-start}header nav{gap:12px;font-size:13px;flex-wrap:wrap;justify-content:flex-end}header span{display:none}main{padding:20px 12px 60px}.hero{min-height:330px;padding:28px 22px;border-radius:20px}.hero p{font-size:16px}.archive-head{align-items:flex-start;margin-top:36px}.archive-head h2{font-size:28px}.activity-grid{grid-template-columns:1fr}.cover{height:230px}}