:root{--text-primary: #1A1A1A;--text-secondary: #6B6B6B;--text-tertiary: #9B9B9B;--bg-page: #E8E6E1;--bg-primary: #FAFAFA;--bg-secondary: #F2F2F4;--bg-tertiary: #FFFFFF;--sidebar-bg: #191D2B;--sidebar-border: #272C3E;--sidebar-text: #D1D5E4;--sidebar-text-secondary: #6C7293;--sidebar-hover: #21263A;--sidebar-active-bg: rgba(86, 141, 229, .14);--sidebar-active: #568DE5;--accent: #3B7DD8;--accent-hover: #2B62AD;--accent-light: rgba(59, 125, 216, .07);--gold: #C5961B;--gold-hover: #8B6914;--gold-light: rgba(197, 150, 27, .08);--color-concept: #3B7DD8;--color-company: #47956A;--color-person: #C5961B;--color-interview: #7E5FAD;--color-letter: #C2604A;--border: #DCDCDC;--border-light: #EAEAEA;--shadow-sm: 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 2px 8px rgba(0,0,0,.06);--shadow-lg: 0 8px 24px rgba(0,0,0,.08);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-pill: 20px;--sidebar-width: 250px}*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,PingFang SC,Hiragino Sans GB,Helvetica Neue,Arial,sans-serif;background:var(--bg-page);color:var(--text-primary);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none}h1,h2,h3,h4{font-weight:700;letter-spacing:-.02em;color:var(--text-primary);margin:0}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#c9c9ce;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a9a9ae}.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);position:fixed;top:0;left:0;bottom:0;background:var(--sidebar-bg);border-right:1px solid var(--sidebar-border);color:var(--sidebar-text);font-size:15px;display:flex;flex-direction:column;overflow-y:auto}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:#3a4058}.sidebar .logo{padding:20px 20px 16px;color:#fff;font-size:16px;font-weight:700;letter-spacing:-.02em;border-bottom:1px solid var(--sidebar-border)}.nav-section{padding:14px 10px 6px}.nav-label{padding:8px 12px 6px;font-size:11px;font-weight:700;text-transform:uppercase;color:var(--sidebar-text-secondary);letter-spacing:.08em}.nav-item{display:flex;align-items:center;justify-content:space-between;padding:9px 12px;border-radius:8px;color:var(--sidebar-text);cursor:pointer;transition:all .2s ease;margin-bottom:1px}.nav-item:hover{background:var(--sidebar-hover)}.nav-item.active{background:var(--sidebar-active-bg);color:#fff}.nav-item .icon{margin-right:10px}.nav-item .count{background:#ffffff14;color:var(--sidebar-text-secondary);font-size:11px;padding:2px 8px;border-radius:10px}.sidebar-footer{margin-top:auto;padding:14px;border-top:1px solid var(--sidebar-border)}.ai-buffett-btn{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px 14px;border-radius:12px;background:linear-gradient(135deg,#c5961b,#9e7410);color:#1a1a1a;font-weight:700;font-size:14px;transition:all .2s ease}.ai-buffett-btn:hover{transform:translateY(-1px);box-shadow:0 4px 14px #c5961b59}.new-badge{background:#3b7dd8;color:#fff;font-size:10px;font-weight:700;padding:2px 6px;border-radius:6px;letter-spacing:.05em}.main{flex:1;margin-left:var(--sidebar-width);background:var(--bg-primary);min-height:100vh;padding:28px 32px 80px}.hero{background:linear-gradient(135deg,#191d2b,#1e2438 55%,#252d45);color:#fff;border-radius:var(--radius-lg);padding:28px 32px;box-shadow:var(--shadow-md)}.card{background:var(--bg-tertiary);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);margin-top:20px}.card h2{font-size:18px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--border-light)}.badge{display:inline-block;padding:3px 10px;border-radius:var(--radius-pill);font-size:12px;font-weight:600;color:#fff}.badge-concept{background:var(--color-concept)}.badge-company{background:var(--color-company)}.badge-person{background:var(--color-person)}.badge-interview{background:var(--color-interview)}.badge-letter{background:var(--color-letter)}.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border-radius:var(--radius-pill);font-weight:600;font-size:14px;transition:all .2s ease}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-gold{background:var(--gold);color:#1a1a1a}.btn-gold:hover{background:var(--gold-hover);color:#fff;transform:translateY(-1px)}.btn-ghost{background:#ffffff1f;color:#fff;border:1px solid rgba(255,255,255,.35)}.btn-ghost:hover{background:#ffffff38}.search-wrap{position:relative;margin-top:20px}.search-input{width:100%;background:var(--bg-secondary);border:1px solid transparent;border-radius:var(--radius-pill);padding:12px 16px 12px 42px;font-size:14px;outline:none;transition:all .2s ease;font-family:inherit}.search-input:focus{border-color:var(--accent);background:#fff}.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-tertiary);pointer-events:none}.crumbs{color:var(--text-secondary);font-size:13px;margin-bottom:16px}.crumbs a{color:var(--accent)}.crumbs a:hover{text-decoration:underline}.small-muted{color:var(--text-tertiary);font-size:12px}