/* global_enhance.css - 修复版 */

/* 全局背景和字体增强 */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

/* 主容器增强 */
.container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin: 20px auto;
    padding: 30px;
    backdrop-filter: blur(10px);
}

/* 导航栏美化 */
header {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

nav {
    background: transparent;
}

.logo {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    font-size: 1.8rem;
}

/* 按钮美化 */
.btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 25px;
    padding: 10px 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    color: white;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

/* 卡片美化 */
.blog-card, .form-container, .message-board {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* 页头美化 - 修复对比度问题 */
.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: linear-gradient(135deg, #4a5568, #2d3748); /* 更深的背景色 */
    border-radius: 15px;
    color: white;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: cover;
}

.page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    font-weight: 700;
    position: relative;
    color: #ffffff; /* 确保白色文字 */
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3); /* 添加文字阴影增强可读性 */
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.95; /* 提高不透明度 */
    position: relative;
    color: #e2e8f0; /* 更亮的灰色 */
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3); /* 添加文字阴影 */
    font-weight: 500;
}

/* 输入框美化 */
.form-control {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 12px 15px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
}

/* 页脚美化 */
footer {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 50px;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

main .container {
    animation: fadeIn 0.6s ease-out;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        padding: 20px;
        border-radius: 10px;
    }

    .page-header {
        padding: 20px;
        margin-bottom: 30px;
    }

    .page-header h1 {
        font-size: 2.2rem;
    }
}