*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:#f5f7fa;color:#333;font-size:14px}
a{color:inherit;text-decoration:none}
ul,li{list-style:none}
:root{--primary:#5b3cc4;--primary-dark:#4a2fa8;--secondary:#ff6c00;--gray:#f5f7fa;--border:#e6e8eb}

.header{background:#1a1a1a;color:#fff;padding:14px 0;box-shadow:0 2px 6px rgba(0,0,0,.1)}
.header .wrap{display:flex;align-items:center;max-width:1200px;margin:0 auto;padding:0 20px}
.header .logo img{height:36px}
.header .nav{margin-left:auto;display:flex;align-items:center;gap:6px;flex-wrap:nowrap}
.header .nav a{color:#ccc;padding:8px 14px;border-radius:4px;font-size:14px;white-space:nowrap;transition:all .2s}
.header .nav a:hover,.header .nav a.active{background:var(--primary);color:#fff}
.header .nav .caret{font-size:10px;opacity:.7;margin-left:2px}
.header .nav .nav-group{position:relative}
.header .nav .nav-group:hover .sub{display:block}
.header .nav .sub{display:none;position:absolute;top:100%;left:0;min-width:200px;background:#2a2a2a;border-radius:0 0 6px 6px;box-shadow:0 6px 16px rgba(0,0,0,.3);padding:6px 0;z-index:99}
.header .nav .sub a{display:block;padding:9px 18px;border-radius:0;font-size:13px;color:#ccc;background:transparent}
.header .nav .sub a:hover{background:var(--primary);color:#fff}
.header .nav .ai-link{background:linear-gradient(135deg,#ff6c00 0%,#ff9966 100%);color:#fff!important;font-weight:bold;padding:8px 14px;border-radius:4px}
.header .nav .ai-link:hover,.header .nav .ai-link.active{background:linear-gradient(135deg,#e55e00 0%,#ff6633 100%)!important}
.header .user{margin-left:16px;font-size:14px;color:#aaa;display:flex;align-items:center;flex-shrink:0}
.header .user a{color:#fff;margin-left:12px}
.header .user .btn{background:var(--secondary);padding:6px 14px;border-radius:4px;color:#fff}
.header .user .btn-wechat{background:#07c160;padding:6px 14px;border-radius:4px;color:#fff;font-weight:bold}
.header .user .btn-wechat:hover{background:#06ad56}

.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

.container{padding:30px 0}
.row{display:grid;gap:20px}
.row.cols-2{grid-template-columns:1fr 1fr}
.row.cols-3{grid-template-columns:repeat(3,1fr)}
.row.cols-4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border-radius:8px;padding:24px;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.card h3{font-size:18px;margin-bottom:14px;color:#333}
.card p{color:#666;line-height:1.7}
.card a{color:var(--primary)}
.card a:hover{text-decoration:underline}

.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}
.text-muted{color:#999}
.text-center{text-align:center}
.text-primary{color:var(--primary)}
.text-warn{color:var(--secondary)}

.empty-state{padding:40px 20px;text-align:center;color:#999}
details summary{outline:0}
details summary::-webkit-details-marker{display:none}

.alert{padding:14px 20px;border-radius:6px;margin-bottom:16px;font-size:14px}
.alert-ok{background:#d4edda;color:#155724;border:1px solid #c3e6cb}
.alert-err{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}
.alert-info{background:#d1ecf1;color:#0c5460;border:1px solid #bee5eb}

.form-row{margin-bottom:18px}
.form-row label{display:block;font-weight:bold;color:#333;margin-bottom:6px;font-size:14px}
.form-row input,.form-row select,.form-row textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:4px;font-size:14px;font-family:inherit}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 3px rgba(91,60,196,.1)}
.form-row .hint{font-size:12px;color:#999;margin-top:4px}
.form-row .err{font-size:12px;color:#c00;margin-top:4px}

.btn{display:inline-block;padding:10px 24px;background:var(--primary);color:#fff;border-radius:4px;font-size:14px;border:0;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--primary-dark)}
.btn-secondary{background:#fff;color:var(--primary);border:1px solid var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff}
.btn-warn{background:var(--secondary)}
.btn-warn:hover{background:#e55e00}
.btn-lg{padding:14px 36px;font-size:16px}
.btn-sm{padding:6px 14px;font-size:13px}

.hero-old{background:linear-gradient(135deg,#1e3c72 0%,#2a5298 100%);color:#fff;padding:80px 0;text-align:center}
.hero-old h1{font-size:42px;margin-bottom:14px}
.hero-old p{font-size:16px;opacity:.9;max-width:700px;margin:0 auto 24px}
.hero-old .btn{display:inline-block;padding:14px 36px;background:var(--secondary);color:#fff;border-radius:4px;font-size:16px}
.hero-old .btn:hover{background:#e55e00}

.section{padding:60px 0}
.section.gray{background:var(--gray)}
.section h2{text-align:center;font-size:30px;margin-bottom:14px}
.section h2::after{content:"";display:block;width:40px;height:3px;background:var(--primary);margin:14px auto 0}
.section .sub-desc{text-align:center;color:#888;margin:14px 0 40px}

.table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.table th{background:#f5f3ff;color:var(--primary);padding:14px;font-size:14px;text-align:left;font-weight:bold}
.table td{padding:14px;border-bottom:1px solid var(--border);font-size:14px}
.table tr:hover td{background:#fafafa}
.table tr:last-child td{border-bottom:0}

.badge{display:inline-block;padding:2px 8px;border-radius:3px;font-size:12px;font-weight:bold}
.badge-ok{background:#28a745;color:#fff}
.badge-warn{background:#ffc107;color:#333}
.badge-err{background:#dc3545;color:#fff}
.badge-info{background:#17a2b8;color:#fff}
.badge-rec{background:var(--secondary);color:#fff}

.plan-card{background:#fff;border:2px solid var(--border);border-radius:8px;padding:24px;text-align:center;transition:all .3s;position:relative}
.plan-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:0 12px 30px rgba(91,60,196,.15)}
.plan-card .ribbon{position:absolute;top:-1px;right:-1px;background:var(--secondary);color:#fff;padding:4px 12px;border-radius:0 8px 0 8px;font-size:12px}
.plan-card h3{font-size:18px;margin-bottom:10px}
.plan-card .spec{color:#888;font-size:13px;margin-bottom:14px;min-height:36px}
.plan-card .price{color:var(--secondary);font-size:14px;margin-bottom:18px}
.plan-card .price b{font-size:32px}
.plan-card form{display:inline}

.user-side{background:#fff;border-radius:8px;padding:0;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.user-side .user-info{padding:24px;background:linear-gradient(135deg,#5b3cc4 0%,#8a5cf0 100%);color:#fff;text-align:center}
.user-side .user-info .avatar{width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.3);margin:0 auto 10px;line-height:64px;font-size:28px;font-weight:bold}
.user-side .user-info .name{font-size:16px;font-weight:bold}
.user-side .user-info .balance{margin-top:8px;font-size:13px;opacity:.9}
.user-side .user-info .balance b{color:#ffe600;font-size:18px}
.user-side .menu li a{display:block;padding:14px 20px;border-bottom:1px solid var(--border);color:#333}
.user-side .menu li a:hover,.user-side .menu li.active a{background:#f5f3ff;color:var(--primary);padding-left:26px}
.user-side .menu li a i{font-style:normal;margin-right:8px}

.col-main{margin-left:0}
.layout-side{flex:0 0 220px}

.layout{display:flex;gap:20px;align-items:flex-start}
.layout .side{flex:0 0 220px}
.layout .main{flex:1;min-width:0}

.footer{background:#1a1a1a;color:#ccc;padding:30px 0;text-align:center;margin-top:40px}
.footer p{font-size:13px;line-height:24px}
.footer a{color:#aaa;margin:0 8px}

.empty-state{padding:40px 20px;text-align:center;color:#999}