/* ==================== 全局样式 ==================== */

/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根元素样式 */
:root {
    /* 平衡少儿编程风格 - 多彩但不花哨 */
    --primary-blue: #4A90E2;         /* 科技蓝 */
    --primary-purple: #9B6DD6;       /* 梦幻紫 */
    --primary-pink: #FF6B9D;         /* 活力粉 */
    --primary-orange: #FF9F40;       /* 活力橙 */
    --primary-green: #5FD4A0;        /* 清新绿 */
    --primary-yellow: #FFC93C;       /* 阳光黄 */
    
    /* 浅色背景 */
    --light-blue: #E8F4FD;           
    --light-purple: #F2EDFF;         
    --light-pink: #FFE8F1;           
    --light-orange: #FFF3E0;         
    --light-green: #E8F9F2;          
    
    /* 中性色 */
    --bg-main: #F8FAFB;              
    --bg-white: #FFFFFF;             
    --text-dark: #2C3E50;            
    --text-gray: #5A6C7D;            
    --text-light: #7B8794;           
    --border-light: #E1E8ED;         
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.1);
    --shadow-color: 0 10px 25px rgba(74, 144, 226, 0.15);
    
    /* 圆角 */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    
    /* 过渡动画 */
    --transition: all 0.3s ease;
}

/* body基础样式 - 柔和渐变背景 */
body {
    font-family: 'Microsoft YaHei', 'SimHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #E8F4FD 0%, #F2EDFF 50%, #FFE8F1 100%);
    min-height: 100vh;
    padding: 30px 0;
    position: relative;
    overflow-x: hidden;
}

/* 添加柔和的装饰圆点 */
body::before {
    content: '';
    position: fixed;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(74, 144, 226, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    top: 10%;
    left: 5%;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(255, 107, 157, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    bottom: 15%;
    right: 8%;
    pointer-events: none;
    z-index: 0;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 链接默认样式 */
a {
    text-decoration: none;
    color: inherit;
}


/* ==================== 头部样式 - 简约风格 ==================== */

.header {
    margin-bottom: 30px;
}

.header .container {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-blue) 100%);
    padding: 45px 30px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-color);
    text-align: center;
    position: relative;
    border: 3px solid transparent;
    background-image: 
        linear-gradient(white, white),
        linear-gradient(90deg, var(--primary-blue), var(--primary-purple), var(--primary-pink));
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

/* 顶部彩色装饰条 */
.header .container::before {
    content: '✨';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    opacity: 0.6;
}

/* 底部装饰条 */
.header .container::after {
    content: '💡 编程改变世界 🚀';
    position: absolute;
    bottom: 12px;
    left: 0;
    right: 0;
    font-size: 0.85rem;
    color: var(--text-light);
    opacity: 0.7;
}

/* Logo区域 */
.logo-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 0;
    position: relative;
    z-index: 1;
}

/* 网站标题 - 彩虹渐变 */
.site-title {
    font-size: 2.2rem;
    font-weight: 800;
    position: relative;
    z-index: 1;
    background: linear-gradient(90deg, 
        var(--primary-blue) 0%, 
        var(--primary-purple) 33%, 
        var(--primary-pink) 66%, 
        var(--primary-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    letter-spacing: 1px;
}

/* 标语 - 带emoji */
.tagline {
    font-size: 1.15rem;
    color: var(--text-gray);
    margin-top: 12px;
    position: relative;
    z-index: 1;
    font-weight: 500;
}

.tagline::before {
    content: '🌟 ';
}

.tagline::after {
    content: ' 🎯';
}


/* ==================== 主内容区 - 模块化设计 ==================== */

.main-content {
    background: transparent;
    padding: 0;
    margin-bottom: 30px;
}

/* 区块容器 - 彩色模块 */
.my-platforms {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-blue) 100%);
    border-radius: var(--radius-xl);
    padding: 35px 30px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    position: relative;
    border-left: 5px solid var(--primary-blue);
}

.practice-platforms {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-purple) 100%);
    border-radius: var(--radius-xl);
    padding: 35px 30px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    position: relative;
    border-left: 5px solid var(--primary-purple);
}

.knowledge-learning {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-green) 100%);
    border-radius: var(--radius-xl);
    padding: 35px 30px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    position: relative;
    border-left: 5px solid var(--primary-green);
}

.programming-tools {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-orange) 100%);
    border-radius: var(--radius-xl);
    padding: 35px 30px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
    position: relative;
    border-left: 5px solid var(--primary-orange);
}

/* 区块标题 - 活泼风格 */
.section-title {
    font-size: 1.7rem;
    color: var(--text-dark);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    position: relative;
    padding-bottom: 18px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple), var(--primary-pink));
    border-radius: 10px;
}

.my-platforms .section-title {
    color: var(--primary-blue);
}

.my-platforms .section-title i {
    color: var(--primary-blue);
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

.practice-platforms .section-title {
    color: var(--primary-purple);
}

.practice-platforms .section-title i {
    color: var(--primary-purple);
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite 0.3s;
}

.knowledge-learning .section-title {
    color: var(--primary-green);
}

.knowledge-learning .section-title i {
    color: var(--primary-green);
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite 0.6s;
}

.programming-tools .section-title {
    color: var(--primary-orange);
}

.programming-tools .section-title i {
    color: var(--primary-orange);
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite 0.9s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}


/* ==================== 我的平台区域 ==================== */

/* 平台卡片容器 - 使用和资源卡片相同的布局 */
.platform-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 18px;
}

/* 平台卡片 - 统一样式 */
.platform-card {
    background: var(--bg-white);
    padding: 22px 18px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-light);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

/* 卡片图标 */
.card-icon {
    font-size: 2.8rem;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

/* 卡片标题 */
.card-title {
    font-size: 1.05rem;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
    position: relative;
    z-index: 1;
}

/* 卡片副标题（隐藏以保持简洁）*/
.card-subtitle {
    display: none;
}

/* 卡片描述（隐藏以保持简洁）*/
.card-description {
    display: none;
}

/* 卡片底部（隐藏以保持简洁）*/
.card-footer {
    display: none;
}

/* 添加简短说明文字 */
.platform-card::after {
    content: attr(data-desc);
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.5;
    position: relative;
    z-index: 1;
}

/* 卡片悬停效果 */
.platform-card:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: var(--shadow-lg);
}

.platform-card:hover .card-icon {
    transform: scale(1.15);
}

/* 不同卡片的彩色背景和图标 */
.card-main {
    border-color: var(--primary-blue);
}

.card-main .card-icon {
    color: var(--primary-blue);
}

.card-main:hover {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-blue) 100%);
}

.card-oj {
    border-color: var(--primary-orange);
}

.card-oj .card-icon {
    color: var(--primary-orange);
}

.card-oj:hover {
    border-color: var(--primary-orange);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-orange) 100%);
}

.card-blog {
    border-color: var(--primary-pink);
}

.card-blog .card-icon {
    color: var(--primary-pink);
}

.card-blog:hover {
    border-color: var(--primary-pink);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-pink) 100%);
}

.card-store {
    border-color: var(--primary-green);
}

.card-store .card-icon {
    color: var(--primary-green);
}

.card-store:hover {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-green) 100%);
}


/* ==================== 资源区域 ==================== */

/* 资源网格 */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 18px;
}

/* 资源卡片 - 轻盈设计 */
.resource-card {
    background: var(--bg-white);
    padding: 22px 18px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-light);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

/* 资源卡片悬停效果 */
.resource-card:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: var(--shadow-lg);
}

.practice-platforms .resource-card:hover {
    border-color: var(--primary-purple);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-purple) 100%);
}

.knowledge-learning .resource-card:hover {
    border-color: var(--primary-green);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-green) 100%);
}

.programming-tools .resource-card:hover {
    border-color: var(--primary-orange);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-orange) 100%);
}

/* 资源图标 - 动态效果 */
.resource-icon {
    font-size: 2.8rem;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.resource-card:hover .resource-icon {
    transform: scale(1.15);
}

/* 资源标题 */
.resource-card h4 {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* 资源描述 */
.resource-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.5;
    position: relative;
    z-index: 1;
}


/* ==================== 底部样式 - 彩色风格 ==================== */

.footer {
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--light-blue) 100%);
    padding: 35px 20px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    border: 3px solid transparent;
    background-image: 
        linear-gradient(white, #E8F4FD),
        linear-gradient(90deg, var(--primary-blue), var(--primary-purple), var(--primary-orange));
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

.footer::before {
    content: '⭐ 💻 🎨 🚀';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.2rem;
    opacity: 0.5;
}

/* 版权信息 */
.copyright {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 8px;
    font-weight: 500;
}

/* 底部标语 */
.slogan {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}


/* ==================== 响应式设计 ==================== */

/* 平板设备 */
@media (max-width: 768px) {
    /* 头部调整 */
    .header .container {
        padding: 35px 20px;
    }
    
    .logo-section {
        flex-direction: column;
        gap: 10px;
    }
    
    .site-title {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    /* 模块化区块调整 */
    .my-platforms,
    .practice-platforms,
    .knowledge-learning,
    .programming-tools {
        padding: 30px 20px;
    }
    
    /* 平台卡片调整 */
    .platform-cards {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 15px;
    }
    
    /* 区块标题调整 */
    .section-title {
        font-size: 1.6rem;
    }
    
    /* 资源网格调整 */
    .resource-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 15px;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    /* 容器内边距 */
    .container {
        padding: 0 15px;
    }
    
    body {
        padding: 15px 0;
    }
    
    /* 头部调整 */
    .header {
        margin-bottom: 25px;
    }
    
    .header .container {
        padding: 30px 20px;
    }
    
    .site-title {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 0.95rem;
    }
    
    /* 模块化区块调整 */
    .my-platforms,
    .practice-platforms,
    .knowledge-learning,
    .programming-tools {
        padding: 25px 20px;
        margin-bottom: 20px;
    }
    
    /* 平台卡片调整 */
    .platform-cards {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    /* 区块标题调整 */
    .section-title {
        font-size: 1.4rem;
    }
    
    /* 资源网格调整 */
    .resource-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    /* 底部调整 */
    .footer {
        padding: 25px 15px;
    }
}


/* ==================== 打印样式 ==================== */

@media print {
    body {
        background: white;
        padding: 0;
    }
    
    .platform-card,
    .resource-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
    
    .platform-card:hover,
    .resource-card:hover {
        transform: none;
    }
}