:root{--navy:#102a43;--ink:#17232d;--red:#c53b35;--gold:#d59a35;--muted:#6d7881;--line:#dfe5e8;--soft:#f5f7f8;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--soft);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}button,input{font:inherit}.wrap{width:min(1120px,calc(100% - 36px));margin:auto}
.topbar{background:var(--navy);color:#dbe5ec;font-size:12px}.topbar .wrap{height:34px;display:flex;align-items:center;justify-content:space-between}.topbar b{color:#fff}.site-header{height:74px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{height:100%;display:flex;align-items:center}.brand{display:flex;align-items:center;gap:10px;color:var(--navy)}.brand-logo{width:44px;height:44px;display:block;object-fit:contain;flex:none}.brand span:last-child{display:grid;line-height:1.15}.brand b{font-size:18px}.brand small{font-size:9px;letter-spacing:.17em;color:#7c8992}.nav nav{margin-left:auto;display:flex;gap:28px;font-size:14px}.nav nav a:hover,.nav nav a.active{color:var(--red)}
.knowledge-hero{background:#fff;padding:68px 0 42px;border-bottom:1px solid var(--line)}.eyebrow{font-size:11px;letter-spacing:.18em;color:var(--red);font-weight:800}.knowledge-hero h1{font-size:clamp(34px,6vw,62px);line-height:1.08;color:var(--navy);margin:14px 0}.knowledge-hero p{margin:0;color:var(--muted);font-size:17px}.searchbar{display:flex;margin-top:28px;width:min(720px,100%);border:1px solid #cfd8dd;background:#fff}.searchbar input{flex:1;min-width:0;border:0;outline:0;padding:13px 16px}.searchbar button{border:0;background:var(--red);color:#fff;padding:0 22px;font-weight:700}
.knowledge-main{padding:34px 0 70px}.filterbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}.filterbar button{border:1px solid var(--line);background:#fff;color:#55636d;padding:7px 13px;cursor:pointer}.filterbar button.active{background:var(--navy);border-color:var(--navy);color:#fff}.featured-card{display:grid;grid-template-columns:1.12fr .88fr;background:#fff;border:1px solid var(--line);margin-bottom:20px;overflow:hidden}.featured-card img{width:100%;height:100%;min-height:360px;object-fit:cover}.featured-copy{padding:46px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.tagline{display:flex;gap:8px;flex-wrap:wrap}.tag{font-size:11px;color:var(--red);border:1px solid #ead0ce;padding:4px 8px}.tag.member{background:#fff4df;border-color:#edd49a;color:#8b6417}.featured-copy h2{font-size:clamp(26px,3vw,38px);line-height:1.3;color:var(--navy);margin:18px 0 12px}.featured-copy p{color:var(--muted);margin:0 0 24px}.read-link{color:var(--red);font-weight:700}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.knowledge-card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;transition:.2s}.knowledge-card:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(16,42,67,.09)}.knowledge-card img{width:100%;height:180px;object-fit:cover}.knowledge-card-body{padding:20px;display:flex;flex-direction:column;flex:1}.knowledge-card h3{font-size:18px;line-height:1.45;color:var(--navy);margin:14px 0 9px}.knowledge-card p{font-size:13px;color:var(--muted);margin:0 0 18px}.knowledge-card .read-link{margin-top:auto;font-size:13px}.empty{grid-column:1/-1;text-align:center;background:#fff;border:1px solid var(--line);padding:48px;color:var(--muted)}
.breadcrumb{padding:22px 0;font-size:12px;color:#74808a;display:flex;gap:9px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:28px;align-items:start;padding-bottom:70px}.article-main{background:#fff;border:1px solid var(--line)}.article-cover{width:100%;max-height:480px;object-fit:cover;display:block}.article-head{padding:42px 48px 28px;border-bottom:1px solid var(--line)}.article-head h1{font-size:clamp(28px,4vw,46px);line-height:1.25;color:var(--navy);margin:17px 0 14px}.article-head p{font-size:16px;color:var(--muted);margin:0}.article-meta{margin-top:20px;font-size:12px;color:#83909a}.article-body{padding:34px 48px 50px}.article-body p{font-size:16px;line-height:2;margin:0 0 24px}.article-body p:first-child{font-weight:700;color:var(--navy)}.article-media{display:grid;gap:18px;margin-top:30px}.article-media img,.article-media video{width:100%;display:block;background:#111}.article-side{position:sticky;top:98px;display:grid;gap:14px}.side-card{background:#fff;border:1px solid var(--line);padding:20px}.side-card small{color:var(--red);letter-spacing:.1em}.side-card b{display:block;color:var(--navy);margin:8px 0}.side-card p{font-size:12px;color:var(--muted);margin:0}.side-card a{display:inline-block;color:var(--red);font-size:13px;font-weight:700;margin-top:12px}
.member-gate{background:#fff;border:1px solid var(--line);padding:44px;max-width:720px;margin:0 auto 70px;text-align:center}.lock{width:54px;height:54px;border-radius:50%;background:#fff3df;color:#916612;display:grid;place-items:center;margin:auto;font-size:22px}.member-gate h2{color:var(--navy);margin:16px 0 6px}.member-gate>p{color:var(--muted);margin:0 0 22px}.auth-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:16px}.auth-tabs button{border:1px solid var(--line);background:#fff;padding:8px 18px;cursor:pointer}.auth-tabs button.active{background:var(--navy);color:#fff}.auth-form{display:grid;gap:11px;max-width:420px;margin:auto}.auth-form.hidden{display:none}.auth-form input{border:1px solid var(--line);padding:11px 12px;outline:0}.auth-form button{border:0;background:var(--red);color:#fff;padding:11px;font-weight:700;cursor:pointer}.auth-message{font-size:12px;color:var(--red);min-height:20px;margin-top:10px}.loading{padding:80px 20px;text-align:center;color:var(--muted)}
.site-footer{background:var(--navy);color:#aebdca;padding:26px 0;font-size:12px}.site-footer .wrap{display:flex;justify-content:space-between;gap:18px}.site-footer b{color:#fff}
@media(max-width:850px){.article-grid{grid-template-columns:repeat(2,1fr)}.featured-card{grid-template-columns:1fr}.featured-card img{min-height:260px}.article-layout{grid-template-columns:1fr}.article-side{position:static}.nav nav{gap:16px}}
@media(max-width:600px){.topbar .wrap span:last-child{display:none}.site-header{height:66px}.brand-logo{width:38px;height:38px}.nav nav a:nth-child(3),.nav nav a:nth-child(4){display:none}.knowledge-hero{padding:44px 0 30px}.knowledge-hero p{font-size:14px}.searchbar button{padding:0 14px}.featured-copy{padding:26px 22px}.featured-card img{min-height:210px}.article-grid{grid-template-columns:1fr}.knowledge-card img{height:200px}.article-head,.article-body{padding-left:22px;padding-right:22px}.article-head{padding-top:27px}.article-body p{font-size:15px}.member-gate{padding:28px 20px}.site-footer .wrap{display:block}.site-footer span{display:block;margin-top:6px}}