* {margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft YaHei",sans-serif;}
body {background:#f7f7f7;color:#333;}
.container {display:flex;width:1100px;margin:30px auto;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,0.08);}

/* 侧边栏 */
.sidebar {width:200px;background:#2c3e50;color:#fff;min-height:600px;}
.sidebar .menu-title {padding:18px;background:#1a252f;font-size:16px;font-weight:bold;text-align:center;}
.sidebar .menu-item {padding:14px 20px;cursor:pointer;border-left:3px solid transparent;transition:0.2s;}
.sidebar .menu-item.active {background:#34495e;border-left:3px solid #e74c3c;}
.sidebar .menu-item:hover {background:#34495e;}

/* 内容区 */
.content {flex:1;padding:30px;}
.content h1 {font-size:24px;margin-bottom:25px;padding-bottom:12px;border-bottom:2px solid #e74c3c;color:#2c3e50;}
.content h2 {font-size:18px;margin:20px 0 15px;color:#e74c3c;}

/* 友联展示 */
.logo-links {display:flex;flex-wrap:wrap;gap:20px;margin:15px 0;}
.logo-item {width:120px;text-align:center;}
.logo-item img {width:120px;height:60px;object-fit:contain;background:#f1f1f1;margin-bottom:6px;border-radius:4px;}
.logo-item a {text-decoration:none;color:#333;font-size:14px;}

.text-links {display:flex;flex-wrap:wrap;gap:12px;margin:15px 0;}
.text-item {padding:8px 14px;background:#f1f1f1;border-radius:4px;}
.text-item a {text-decoration:none;color:#2980b9;}
.text-item a:hover {text-decoration:underline;}

/* 表单 */
.form-group {margin-bottom:18px;}
.form-group label {display:block;margin-bottom:6px;font-weight:bold;}
.form-control {width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;}
.btn {padding:10px 22px;border:none;border-radius:4px;cursor:pointer;background:#e74c3c;color:#fff;font-size:14px;}
.btn:hover {background:#c0392b;}

/* 说明与提示 */
.intro-text {line-height:1.9;margin:10px 0;color:#555;}
.intro-text li {margin-left:22px;margin-bottom:6px;}
.alert {padding:12px 15px;border-radius:4px;margin-bottom:15px;}
.alert-success {background:#d4edda;color:#155724;}
.alert-danger {background:#f8d7da;color:#721c24;}

/* 上传目录 */
.upload {margin:10px 0;}