:root{--primary:#4f46e5;--primary-light:#eef2ff;--primary-dark:#4338ca;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#0ea5e9;--text:#1e293b;--text-muted:#64748b;--text-light:#94a3b8;--bg:#f8fafc;--bg-white:#fff;--border:#e2e8f0;--border-light:#f1f5f9;--radius-sm:6px;--radius:10px;--radius-lg:16px;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -2px rgba(0,0,0,.05);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.08),0 4px 6px -4px rgba(0,0,0,.05);--header-h:64px}*{margin:0;padding:0;box-sizing:border-box}body,html{overflow-x:hidden;max-width:100vw}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft 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a{color:var(--primary,#4f46e5)}.link-code{font-size:18px;color:var(--danger,#e74c3c);letter-spacing:2px}.link-close{width:100%;margin-top:16px;padding:10px}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;border:1px solid var(--border,#ddd);border-radius:6px;background:#fff;color:var(--text,#333);font-size:13px;cursor:pointer;transition:all .2s}.btn-secondary:hover{border-color:var(--primary,#4f46e5);color:var(--primary,#4f46e5)}.player-wrapper{margin:24px 0;border-radius:8px;overflow:hidden;background:#000}.player-box{width:100%;min-height:400px;display:flex;align-items:center;justify-content:center}.no-source{color:#666;text-align:center;padding:80px 0}.source-switcher{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:12px 16px;background:#f5f5f5}.source-btn{padding:6px 16px;border:1px solid #ddd;border-radius:4px;background:#fff;cursor:pointer;font-size:13px;transition:all .2s}.source-btn.active,.source-btn:hover{border-color:var(--primary)}.source-btn.active{background:var(--primary);color:#fff}.lock-video{text-align:center;padding:60px 20px;color:#fff;min-height:400px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#111;border-radius:8px}.lock-icon{font-size:48px;margin-bottom:16px}.lock-video h3{font-size:22px;margin-bottom:8px}.lock-video p{color:#ccc;margin-bottom:20px}.lock-actions{display:flex;gap:12px;margin-bottom:24px;flex-wrap:wrap;justify-content:center}.access-rules{background:hsla(0,0%,100%,.1);padding:16px 24px;border-radius:8px;max-width:500px}.rule-line{font-size:13px;color:#ddd;margin:6px 0;text-align:left}.video-desc{margin-top:24px;padding:20px;background:#f8f9fa;border-radius:8px}.video-desc h3{margin:0 0 12px;font-size:16px}.chapter-list{display:flex;flex-direction:column;gap:8px}.chapter-item{display:flex;align-items:center;justify-content:space-between;padding:12px 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