/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

/* 布局容器 */
.container {
    width: 100%;
    max-width: 750px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    margin-bottom: 15px;
    overflow: hidden;
}

.card-header {
    padding: 15px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.card-body {
    padding: 15px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 8px 20px;
    border: none;
    border-radius: 20px;
    font-size: 14px;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #ff4d6b, #ff8fa3);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #f0f0f0;
    color: #666;
}

/* 用户头像 */
.avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.avatar-sm {
    width: 50px;
    height: 50px;
}

.avatar-lg {
    width: 100px;
    height: 100px;
}

/* 标签样式 */
.tag {
    display: inline-block;
    padding: 3px 8px;
    background: #f0f0f0;
    color: #666;
    border-radius: 10px;
    font-size: 12px;
    margin-right: 5px;
    margin-bottom: 5px;
}

.tag-primary {
    background: rgba(255, 77, 107, 0.1);
    color: #ff4d6b;
}

.tag-success {
    background: rgba(82, 196, 26, 0.1);
    color: #52c41a;
}

.tag-warning {
    background: rgba(250, 173, 20, 0.1);
    color: #faad14;
}

/* 实用类 */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-10 { margin-top: 10px; }
.mb-10 { margin-bottom: 10px; }
.ml-10 { margin-left: 10px; }
.mr-10 { margin-right: 10px; }

.pt-10 { padding-top: 10px; }
.pb-10 { padding-bottom: 10px; }
.pl-10 { padding-left: 10px; }
.pr-10 { padding-right: 10px; }

.flex { display: flex; }
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}
.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.flex-column {
    display: flex;
    flex-direction: column;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .card {
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .card-header {
        padding: 12px;
    }
    
    .card-body {
        padding: 12px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}