* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

/* 二维码区域 */
.qrcode-section {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.qrcode-item {
    text-align: center;
    flex: 1;
    min-width: 300px;
}

.qrcode-item h3 {
    margin-bottom: 15px;
    color: #333;
}

.qrcode-img {
    max-width: 250px;
    max-height: 250px;
    border: 2px solid #f0f0f0;
    border-radius: 10px;
    padding: 10px;
    background: white;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* 赞赏列表 */
.donation-list h2 {
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

th {
    background-color: #f8f9fa;
    color: #333;
    font-weight: 600;
}

tr:hover {
    background-color: #f8f9fa;
}

.no-data {
    text-align: center;
    color: #999;
    padding: 30px;
}

/* 表单样式 */
.form {
    max-width: 500px;
    margin: 20px auto;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: opacity 0.3s;
}

button:hover {
    opacity: 0.9;
}

/* 后台管理样式 */
.admin-nav {
    text-align: right;
    margin-bottom: 20px;
}

.admin-nav a {
    color: #667eea;
    text-decoration: none;
    margin-left: 20px;
}

.admin-nav a:hover {
    text-decoration: underline;
}

.admin-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
}

.admin-section h2 {
    margin-bottom: 20px;
    color: #333;
    font-size: 1.2em;
}

.qrcode-manage {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.error {
    background: #fee;
    color: #c33;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.success {
    background: #efe;
    color: #3c3;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.delete-btn {
    color: #c33;
    text-decoration: none;
    padding: 5px 10px;
    border: 1px solid #c33;
    border-radius: 3px;
    font-size: 12px;
}

.delete-btn:hover {
    background: #c33;
    color: white;
}

.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.footer a {
    color: #667eea;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}