:root{--bg: #f5f0e8;--bg2: #fff;--bg3: #faf6ef;--bg4: #f0ebe0;--card: #fff;--card-hover: #faf6ef;--text: #2d2d2d;--text2: #5a5a5a;--text3: #999;--accent: #e74c3c;--accent2: #c0392b;--accent-glow: rgba(231, 76, 60, .08);--gold: #e67e22;--green: #27ae60;--red: #e74c3c;--blue: #3498db;--border: #e8e0d0;--radius: 10px;--shadow: 0 2px 12px rgba(0,0,0,.06);--gradient: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent2)}.app{min-height:100vh;display:flex;flex-direction:column}.nav{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 1px 4px #0000000a}.nav-logo{font-size:18px;font-weight:800;color:var(--accent)}.nav-links{display:flex;gap:4px;align-items:center}.nav-links a,.nav-links button{color:var(--text2);font-size:14px;background:none;border:none;cursor:pointer;padding:6px 12px;border-radius:6px;transition:all .2s}.nav-links a:hover,.nav-links button:hover{color:var(--accent);background:var(--accent-glow)}.main{flex:1;max-width:1200px;margin:0 auto;padding:24px 20px;width:100%}.hero{text-align:center;padding:40px 20px 32px;background:#fff;border-radius:12px;border:1px solid var(--border);margin-bottom:28px}.hero h1{font-size:28px;font-weight:800;color:var(--text);margin-bottom:6px}.hero p{color:var(--text3);font-size:14px}.hero-stats{display:flex;justify-content:center;gap:40px;margin-top:20px}.hero-stat-num{font-size:24px;font-weight:800;color:var(--accent)}.hero-stat-label{font-size:12px;color:var(--text3)}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.section-title{font-size:20px;font-weight:700;display:flex;align-items:center;gap:6px}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.book-card{background:#fff;border:1px solid var(--border);border-radius:10px;overflow:hidden;transition:all 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a{display:block;text-align:center;margin-top:14px;color:var(--text3);font-size:13px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;border-radius:14px;padding:32px;max-width:400px;width:90%;text-align:center;box-shadow:0 8px 32px #00000026}.modal-icon{font-size:48px;margin-bottom:12px}.loading{text-align:center;padding:60px;color:var(--text3)}.error-msg{color:var(--red);background:#e74c3c0f;padding:8px 14px;border-radius:8px;margin-bottom:12px;font-size:14px}.success-msg{color:var(--green);background:#27ae600f;padding:8px 14px;border-radius:8px;margin-bottom:12px;font-size:14px}.card{background:#fff;border:1px solid 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