/* 全局重置与基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #121212;
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 动态背景 */
#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: url('../assets/bg.jpg') no-repeat center center;
    background-size: cover;
    z-index: -1;
    filter: brightness(0.7); /* 稍微压暗一点，确保白色字体能看清 */
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 主容器，靠左显示给背景留出空间 */
.main-container {
    max-width: 700px;
    margin: 0 0 0 5vw; /* 靠左并留出 5% 的边距 */
    padding: 40px 20px;
}

/* 头部区 */
.profile-section {
    background: rgba(0, 0, 0, 0.5);
    padding: 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.05);
    text-align: left;
    margin-bottom: 50px;
    animation: fadeInDown 1s ease;
}

.welcome-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    font-weight: 300;
}

.welcome-title span {
    color: #4facfe;
    font-weight: bold;
}

.avatar-container {
    margin-bottom: 25px;
    text-align: left;
}

.avatar {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    border: 4px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(79, 172, 254, 0.4);
    transition: transform 0.5s ease, box-shadow 0.5s ease;
    cursor: pointer;
}

.avatar:hover {
    transform: rotate(360deg) scale(1.1);
    box-shadow: 0 0 30px rgba(79, 172, 254, 0.8);
}

.tags-container {
    background: rgba(0, 0, 0, 0.6);
    padding: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: inline-block;
    text-align: left;
}

.tag-line {
    margin: 8px 0;
    font-size: 1.1rem;
    color: #ccc;
}

.highlight {
    color: #4facfe;
    background: rgba(79, 172, 254, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.95em;
}

/* 标题样式通用 */
.section-title {
    font-size: 1.8rem;
    margin-bottom: 30px;
    border-left: 5px solid #4facfe;
    padding-left: 15px;
}

.section-title span {
    color: #4facfe;
}

.section {
    margin-bottom: 60px;
    animation: fadeInUp 1s ease;
}

/* 社交媒体卡片 */
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.social-card {
    flex: 1 1 calc(25% - 15px);
    min-width: 140px;
    position: relative;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 12px;
    text-decoration: none;
    color: #fff;
    overflow: hidden;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.social-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--hover-color);
    transition: width 0.4s ease;
    z-index: 1;
    opacity: 0.8;
}

.social-card:hover .social-bg {
    width: 100%;
}

.social-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 500;
}

.social-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

/* 网站合集区 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.project-card {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    padding: 25px 20px;
    border-radius: 15px;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.project-card:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: translateY(-5px);
}

.star-icon {
    position: absolute;
    top: 20px;
    right: 20px;
    color: #ffd700;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.project-card:hover .star-icon {
    opacity: 1;
}

.project-card a {
    color: #fff;
    text-decoration: none;
}

.project-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.project-card p {
    font-size: 0.9rem;
    color: #aaa;
    margin-bottom: 15px;
}

.project-tag span {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    color: #fff;
    font-weight: bold;
}

/* 热榜快讯区 */
.hot-news-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.hot-card {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    border-radius: 15px;
    padding: 20px;
    border: 1px solid rgba(255,255,255,0.05);
}

.hot-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 1.2rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 10px;
}

.hot-list {
    list-style: none;
}

.hot-list li {
    font-size: 0.95rem;
    color: #ddd;
    margin-bottom: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    transition: color 0.2s ease;
}

.hot-list li:hover {
    color: #4facfe;
}

/* 页脚 */
.footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #777;
    font-size: 0.9rem;
}

/* 动画定义 */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.blog-list {
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.blog-link {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.blog-link:hover {
    background: rgba(79, 172, 254, 0.2);
    color: #4facfe;
    border-color: #4facfe;
    transform: translateY(-2px);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .main-container {
        margin: 0 auto; /* 手机端恢复居中 */
        padding: 20px 15px; /* 减少手机端左右边距 */
    }

    .profile-section {
    background: rgba(0, 0, 0, 0.5);
    padding: 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.05);
        text-align: center; /* 手机端头部内容居中 */
    }
    
    .avatar-container, .tags-container {
        text-align: center;
    }

    .welcome-title {
        font-size: 1.8rem; /* 缩小标题字体 */
    }

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

    .social-card {
        flex: 1 1 calc(50% - 15px);
        font-size: 0.95rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); /* 一排展示两个项目卡片 */
        gap: 15px;
    }
    
    .project-card {
        padding: 15px;
    }

    .hot-news-container {
        grid-template-columns: 1fr; /* 手机端新闻卡片单列展示 */
    }
}