/* AI知识库 */
:root{--bg:#0d1117;--card:#161b22;--bd:#30363d;--t:#c9d1d9;--m:#8b949e;--a:#58a6ff;--g:#3fb950;--o:#d2991d;--r:#f85149}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--t);line-height:1.6}
a{color:var(--a);text-decoration:none}a:hover{text-decoration:underline}
header{text-align:center;padding:40px 20px 20px}
header h1{font-size:2rem}header h1 a{color:var(--t)}header h1 a:hover{text-decoration:none}
.subtitle{color:var(--m);font-size:.9rem;margin-top:8px}
nav{border-bottom:1px solid var(--bd);margin-bottom:24px;overflow-x:auto}
.nav-bar{display:flex;align-items:center;justify-content:center;gap:8px;max-width:1200px;margin:0 auto;padding:12px 20px;flex-wrap:wrap}
.nav-bar a{color:var(--m);font-size:.85rem;padding:4px 8px;border-radius:4px}
.nav-bar a:hover{color:var(--t);background:var(--card);text-decoration:none}
.nav-current{color:var(--a);font-weight:600;font-size:.85rem}
main{max-width:1200px;margin:0 auto;padding:0 20px 40px}
/* Landing */
.landing{display:flex;gap:40px;justify-content:center;flex-wrap:wrap;padding:80px 20px 60px}
.landing-card{display:block;background:var(--card);border:1px solid var(--bd);border-radius:20px;padding:60px 50px;width:400px;max-width:100%;text-align:center;transition:all .3s;position:relative;overflow:hidden}
.landing-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--card-border,var(--a));transition:height .3s}
.landing-card:hover::before{height:100%;opacity:.05}
.landing-card:hover{transform:translateY(-6px);box-shadow:0 16px 48px rgba(0,0,0,.5);text-decoration:none;border-color:var(--card-border,var(--a))}
.landing-icon{font-size:5rem;margin-bottom:24px;display:block}
.landing-card h2{color:var(--t);font-size:2rem;font-weight:700;margin-bottom:16px;letter-spacing:2px}
.landing-card p{color:var(--m);font-size:1rem;margin-bottom:32px;line-height:1.6}
.landing-enter{display:inline-block;padding:14px 40px;border:2px solid var(--a);border-radius:10px;color:var(--a);font-size:1rem;font-weight:600;letter-spacing:1px;transition:all .2s}
.landing-card:hover .landing-enter{background:var(--a);color:#fff;box-shadow:0 0 30px rgba(88,166,255,.3)}
/* Chain */
.chain-flow{text-align:center;padding:16px;margin-bottom:24px;background:var(--card);border-radius:8px;border:1px solid var(--bd);font-size:.9rem;color:var(--g);letter-spacing:1px}
.section-title{text-align:center;font-size:1.5rem;margin:0 0 20px;padding-bottom:12px;border-bottom:2px solid var(--bd)}
.segments-grid{display:flex;flex-direction:column;gap:24px}
.segment-card{background:var(--card);border-radius:8px;padding:20px 24px;border:1px solid var(--bd)}
.segment-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.3)}
.segment-card h2{font-size:1.3rem;margin-bottom:8px}
.segment-card h2 small{color:var(--m);font-size:.8rem;font-weight:400}
.seg-summary{color:var(--m);font-size:.85rem;margin-bottom:12px}
.seg-stats{font-size:.8rem;color:var(--m);margin-bottom:14px;padding:6px 10px;background:rgba(255,255,255,.03);border-radius:4px}
.sub-segment{margin-top:12px}
.sub-segment h4{font-size:.8rem;color:var(--o);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}
.sub-players{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.region-label{font-size:.7rem;color:var(--m);margin-right:4px;opacity:.7}
.player-tag{display:inline-block;padding:3px 10px;background:rgba(88,166,255,.1);border:1px solid rgba(88,166,255,.2);border-radius:12px;font-size:.8rem;color:var(--a);transition:all .15s}
.player-tag:hover{background:rgba(88,166,255,.2);border-color:var(--a);text-decoration:none}
.segment-header{padding:24px;border-radius:8px;margin-bottom:20px}
.segment-header h2{font-size:1.8rem}
.eng-name{color:var(--m);font-size:.9rem}
.segment-intro{background:var(--card);padding:20px;border-radius:8px;border:1px solid var(--bd);margin-bottom:28px}
.segment-intro p{line-height:1.8}
.sub-segment-section{margin-bottom:24px}
.sub-segment-section h3{font-size:1.1rem;margin-bottom:12px;color:var(--o);padding-bottom:6px;border-bottom:1px solid var(--bd)}
.region-group{margin-bottom:16px}
.region-group h4{font-size:.85rem;color:var(--m);margin-bottom:8px}
.player-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.player-card{display:block;background:var(--card);border:1px solid var(--bd);border-radius:8px;padding:14px 16px;transition:all .15s}
.player-card:hover{border-color:var(--a);text-decoration:none;box-shadow:0 2px 12px rgba(0,0,0,.2)}
.player-card-name{font-weight:600;color:var(--t);margin-bottom:4px}
.player-card-summary{font-size:.8rem;color:var(--m);line-height:1.4}
.player-header{display:flex;gap:20px;align-items:center;padding:24px;background:var(--card);border-radius:8px;margin-bottom:24px}
.player-logo-placeholder{width:72px;height:72px;border-radius:16px;background:linear-gradient(135deg,#58a6ff33,#bc8cff33);display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:700;color:var(--a);border:2px solid var(--bd)}
.player-info h2{font-size:1.5rem}
.player-info h3{font-size:1rem;color:var(--m);font-weight:400;margin:4px 0 10px}
.player-meta{display:flex;gap:6px;flex-wrap:wrap}
.tag{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.75rem;background:rgba(255,255,255,.06);border:1px solid var(--bd)}
.region-tag{background:rgba(63,185,80,.1);border-color:rgba(63,185,80,.2);color:var(--g)}
.seg-tag{background:rgba(188,140,255,.1);border-color:rgba(188,140,255,.2);color:#bc8cff}
.player-body{background:var(--card);padding:24px;border-radius:8px;border:1px solid var(--bd)}
.player-summary{margin-bottom:20px}
.player-summary h4{color:var(--m);font-size:.8rem;text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}
.player-summary p{line-height:1.7}
.player-details{width:100%;border-collapse:collapse;font-size:.9rem}
.player-details td{padding:8px 12px;border-bottom:1px solid var(--bd)}
.player-details td:first-child{color:var(--m);width:100px}
footer{text-align:center;padding:30px;color:var(--m);font-size:.8rem;border-top:1px solid var(--bd);margin-top:40px}
@media(max-width:768px){.player-header{flex-direction:column;text-align:center}.player-meta{justify-content:center}.player-grid{grid-template-columns:1fr}.landing-card{width:100%}.chain-flow{font-size:.7rem}}

/* KB News Section */
.kb-news{max-width:900px;margin:40px auto 0;padding:0 20px}
.kb-news-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.kb-news-header h2{font-size:1.3rem;color:var(--t)}
.kb-news-more{color:var(--a);font-size:.85rem;text-decoration:none}
.kb-news-more:hover{text-decoration:underline}
.kb-news-updated{color:var(--m);font-size:.78rem;margin-bottom:16px}
.kb-news-list{display:flex;flex-direction:column;gap:8px}
.news-item{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--card);border:1px solid var(--bd);border-radius:8px;text-decoration:none;transition:border-color .15s}
.news-item:hover{border-color:var(--a);text-decoration:none}
.news-source{flex-shrink:0;padding:2px 8px;border-radius:8px;font-size:.7rem;white-space:nowrap}
.news-source.source-zh{background:rgba(63,185,80,.12);color:var(--g)}
.news-source.source-en{background:rgba(210,153,29,.12);color:var(--o)}
.news-title{flex:1;color:var(--t);font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.news-item:hover .news-title{color:var(--a)}
.news-date{flex-shrink:0;color:var(--m);font-size:.75rem}
@media(max-width:768px){.news-item{gap:8px;padding:10px 12px}.news-title{font-size:.82rem}}