:root{--primary: #c41e3a;--primary-dark: #a01830;--primary-light: #fde8ec;--gold: #d4a017;--bg: #fafafa;--white: #ffffff;--text: #1a1a1a;--text-secondary: #666666;--text-muted: #999999;--border: #e5e5e5;--shadow: 0 2px 12px rgba(0,0,0,.08);--radius: 8px;--max-width: 1200px}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;min-height:100vh}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}.navbar{background:#fff;border-bottom:1px solid var(--border);padding:0 20px;position:sticky;top:0;z-index:100}.navbar-inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:64px}.navbar-brand{font-size:20px;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:8px}.navbar-brand:hover{text-decoration:none}.navbar-links{display:flex;align-items:center;gap:24px}.navbar-links a{color:var(--text);font-size:14px}.navbar-links a:hover{color:var(--primary)}.navbar-user{font-size:14px;color:var(--text-secondary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;transition:all .2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--primary-light);color:var(--primary);border:1px solid var(--primary)}.btn-secondary:hover{background:#f8cdd5}.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.btn-gold{background:linear-gradient(135deg,#d4a017,#e8b730);color:#fff;font-weight:600}.btn-gold:hover{background:linear-gradient(135deg,#c09014,#d4a017)}.btn-sm{padding:6px 14px;font-size:13px}.btn-lg{padding:14px 36px;font-size:16px}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:6px;font-size:14px;font-weight:500;color:var(--text)}.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:inherit;transition:border-color .2s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.form-group textarea{resize:vertical;min-height:120px}.form-error{color:var(--primary);font-size:13px;margin-top:4px}.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.alert{padding:12px 16px;border-radius:var(--radius);margin-bottom:16px;font-size:14px}.alert-error{background:#fde8ec;color:var(--primary);border:1px solid #f5c6cb}.alert-success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-info{background:#cce5ff;color:#004085;border:1px solid #b8daff}.badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:600}.badge-vip{background:linear-gradient(135deg,#d4a017,#e8b730);color:#fff}.badge-admin{background:var(--primary);color:#fff}.badge-free{background:var(--text-muted);color:#fff}.page{padding:40px 0;min-height:calc(100vh - 124px)}.page-hero{text-align:center;padding:80px 0 60px}.page-hero h1{font-size:40px;font-weight:800;color:var(--text);margin-bottom:16px}.page-hero p{font-size:18px;color:var(--text-secondary);max-width:600px;margin:0 auto 32px}.page-title{font-size:28px;font-weight:700;margin-bottom:24px;color:var(--text)}.auth-page{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 200px);padding:40px 20px}.auth-card{width:100%;max-width:420px}.auth-card h2{text-align:center;margin-bottom:8px;font-size:24px}.auth-card .subtitle{text-align:center;color:var(--text-secondary);margin-bottom:24px;font-size:14px}.auth-card .footer-text{text-align:center;margin-top:20px;font-size:14px;color:var(--text-secondary)}.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:20px}.tab{padding:10px 20px;font-size:14px;font-weight:500;color:var(--text-secondary);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;background:none;border-top:none;border-left:none;border-right:none}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}.spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.spinner-lg{width:40px;height:40px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay{display:flex;align-items:center;justify-content:center;padding:40px;gap:12px;color:var(--text-secondary)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-content{background:#fff;border-radius:12px;padding:32px;max-width:560px;width:100%;max-height:90vh;overflow-y:auto}.modal-content h3{font-size:20px;margin-bottom:8px}.modal-content p{color:var(--text-secondary);font-size:14px;margin-bottom:20px}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin:32px 0}.pricing-card{background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:32px 24px;text-align:center;border:2px solid transparent;transition:all .3s}.pricing-card.featured{border-color:var(--gold);box-shadow:0 4px 24px #d4a01733}.pricing-card .plan-name{font-size:18px;font-weight:600;margin-bottom:8px}.pricing-card .plan-price{font-size:36px;font-weight:800;color:var(--primary);margin-bottom:4px}.pricing-card .plan-price span{font-size:16px;font-weight:400;color:var(--text-secondary)}.pricing-card .plan-period{font-size:13px;color:var(--text-muted);margin-bottom:16px}.pricing-card .plan-features{list-style:none;text-align:left;margin:20px 0;font-size:14px}.pricing-card .plan-features li{padding:6px 0;color:var(--text-secondary)}.pricing-card .plan-features li:before{content:"✓ ";color:#28a745;font-weight:700}.pricing-card .plan-tag{display:inline-block;background:linear-gradient(135deg,#d4a017,#e8b730);color:#fff;padding:2px 12px;border-radius:12px;font-size:12px;margin-bottom:12px}.admin-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:32px}.admin-stat-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.admin-stat-card .stat-label{font-size:13px;color:var(--text-muted);margin-bottom:8px}.admin-stat-card .stat-value{font-size:32px;font-weight:700;color:var(--text)}.admin-panel{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}@media(max-width:768px){.admin-panel{grid-template-columns:1fr}}.footer{background:#fff;border-top:1px solid var(--border);padding:20px;text-align:center;font-size:13px;color:var(--text-muted)}.footer a{color:var(--text-secondary)}.result-tabs{margin-top:24px}.result-content{white-space:pre-wrap;font-size:14px;line-height:1.8;color:var(--text);background:#f9f9f9;padding:20px;border-radius:var(--radius);max-height:600px;overflow-y:auto}.text-center{text-align:center}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}