/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #f0f2f5;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #1a73e8;
    margin-bottom: 30px;
    border-bottom: 2px solid #eee;
    padding-bottom: 15px;
}

/* 表单样式 */
.ad-form {
    display: grid;
    gap: 15px;
    margin-bottom: 40px;
    background: #f8f9fa;
    padding: 20px;
    border-radius: 6px;
}

.ad-form input,
.ad-form textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.ad-form button {
    background: #1a73e8;
    color: white;
    padding: 14px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

.ad-form button:hover {
    background: #1557b0;
}

/* 广告列表 */
.ad-list {
    display: grid;
    gap: 25px;
}

.ad-item {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 6px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.ad-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    color: #666;
    font-size: 0.9em;
}

.ad-content p {
    margin-bottom: 10px;
    color: #333;
}

.ad-content a {
    color: #1a73e8;
    text-decoration: none;
}

.ad-content a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .ad-header {
        flex-direction: column;
        gap: 5px;
    }
}

/* 错误提示 */
.error {
    color: #dc3545;
    background: #f8d7da;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
    border: 1px solid #f5c2c7;
}