/* ========== Hero区域 ========== */
.hero {
    padding: 2rem 0;
    text-align: center;
    /* 新增居中 */
    position: relative;
    overflow: hidden;
    margin: 2rem 0;
    background:
        linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%),
        repeating-linear-gradient(45deg,
            rgba(255, 255, 255, 0.1) 0px,
            rgba(255, 255, 255, 0.1) 2px,
            transparent 2px,
            transparent 4px);
    /* 网格背景 */
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(33, 150, 243, 0.15);
}

.hero::after {
    content: "";
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent 25%,
            rgba(255, 255, 255, 0.2) 50%,
            transparent 75%);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% {
        transform: translateX(-50%);
    }

    100% {
        transform: translateX(50%);
    }
}

.hero h1 {
    position: relative;
    z-index: 1;
    font-size: 3.5rem;
    color: #0d47a1;
    /* 深蓝色 */
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.subtitle {
    font-size: 1.5rem;
    color: #1976d2;
    /* 中蓝色 */
    letter-spacing: 0.5px;
    opacity: 0.9;
}

/* ========== 头部 响应式设计 begin========== */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .contact-card h3 {
        font-size: 1.1rem;
    }

    .link-item {
        padding: 0.8rem;
    }
}
/* ========== 头部 响应式设计 end========== */



/* ========== 更新后的联系方式区域 ========== */
:root {
    --primary-blue: #2196F3;
    --hover-blue: #1976D2;
    --light-blue: #E3F2FD;
}

.contact-container {
    margin: 3rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.contact-card {
    background: #ffffff;
    border: 1px solid #e0e0e0;
    /* 新增边框 */
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(33, 150, 243, 0.2);
}

.contact-card h3 {
    margin: 0 0 1rem 0;
    color: var(--primary-blue);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
}

.link-grid {
    display: grid;
    gap: 1rem;
}

.link-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--light-blue);
    border-radius: 8px;
    color: #1E88E5;
    /* 链接默认颜色 */
    text-decoration: none;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.link-item:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--hover-blue);
}

.link-item i {
    font-size: 1.5rem;
    margin-right: 1rem;
    width: 30px;
    text-align: center;
    transition: color 0.2s;
}


/* ========== 原有保留样式 ========== */
.introduction {
    background: var(--md-code-bg-color);
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}


/* ========== 开源项目样式  begin ========== */
.open-source-container {
    margin: 3rem 0;
}

.open-source-container h2 {
    color: #0d47a1;
    border-bottom: 2px solid #e3f2fd;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

/* ========== 卡片视觉优化 ========== */
.project-card {
    background: rgba(227, 242, 253, 0.3); /* 半透明浅蓝背景 */
    border: 1px solid rgba(33, 150, 243, 0.15);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.25s ease;
    backdrop-filter: blur(2px); /* 毛玻璃效果 */
}

.project-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.icon {
    color: #2196F3; /* 主色图标 */
    font-size: 1.4rem;
    min-width: 28px; /* 固定图标宽度 */
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #0d47a1;
    text-decoration: none;
    line-height: 1.3;
    transition: color 0.2s;
}

.project-title:hover {
    color: #1565c0;
    text-decoration: underline;
    text-underline-offset: 0.2em; /* 下划线间距 */
}

.project-description {
    color: #455a64; /* 深灰蓝色 */
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
    padding-left: 2.2rem; /* 与图标对齐 */
}

/* ========== 悬停动效增强 ========== */
.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(33, 150, 243, 0.12);
    background: rgba(227, 242, 253, 0.4);
}

/* ========== 响应式优化 ========== */
@media (max-width: 768px) {
    .project-card {
        padding: 1.2rem;
    }
    
    .project-title {
        font-size: 1.1rem;
    }
    
    .project-description {
        padding-left: 0;
        margin-top: 0.8rem;
    }
    
    .icon {
        min-width: 24px;
        font-size: 1.2rem;
    }
}
/* ========== 开源项目样式  end ========== */

/* ========== 开源项目卡片 响应式优化方案  begin========== */
.project-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

@media (min-width: 1200px) {
    .project-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr)); /* 严格3列 */
    }
}

@media (max-width: 1199px) and (min-width: 768px) {
    .project-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr)); /* 中等屏幕2列 */
    }
    
    /* 奇数项目最后一项居中 */
    .project-card:nth-child(2n+1):last-child {
        grid-column: 1 / -1;
        max-width: 400px;
        margin: 0 auto;
    }
}

/* 移动端保持单列 */
@media (max-width: 767px) {
    .project-grid {
        grid-template-columns: 1fr;
    }
}
/* ========== 开源项目卡片 响应式优化方案  end========== */