/* ===== 基础样式和CSS变量 ===== */
:root {
    /* 明亮主题颜色 */
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --primary-light: #56aeff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --frosted-glass: rgba(255, 255, 255, 0.7);
    --frosted-glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] {
    /* 暗黑主题颜色 */
    --primary-color: #56aeff;
    --primary-dark: #007bff;
    --primary-light: #8bc8ff;
    --secondary-color: #adb5bd;
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --border-color: #495057;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
    --frosted-glass: rgba(30, 30, 30, 0.7);
    --frosted-glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    transition: var(--transition);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 50px;
    font-size: 1.2rem;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.highlight {
    color: var(--primary-color);
}

/* ===== 固定背景图片 ===== */
.background-fixed {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url(assets/images/background.jpg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
    opacity: 1;
}

/* ===== 导航栏样式 ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--frosted-glass-border);
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo span {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 5px;
    border-radius: 50%;
}

.theme-toggle:hover {
    background-color: rgba(0, 123, 255, 0.1);
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

.mobile-nav {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--surface-color);
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    padding: 20px;
    z-index: 999;
}

.mobile-nav.active {
    display: flex;
}

.mobile-nav-link {
    padding: 15px 0;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.mobile-nav-link:hover, .mobile-nav-link.active {
    color: var(--primary-color);
}

/* ===== 个人区域样式 ===== */
.hero {
    padding-top: 150px;
    padding-bottom: 100px;
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr; /* 修改这里：文字占2份，图片占1份 */
    gap: 50px;
    align-items: center;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar {
    width: 100%;
    max-width: 320px;
    height: 320px;
    border-radius: 50%; /* 保持圆形 */
    border: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
    object-fit: cover; /* 确保图片填充圆形 */
    transition: var(--transition);
}

.avatar:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-hover);
}

.hero-text {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 400;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* ===== 关于我区域样式 ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.about-text {
    grid-column: 1 / -1;
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.about-text p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.timeline {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.timeline h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.timeline-item {
    margin-bottom: 25px;
    padding-left: 20px;
    border-left: 3px solid var(--primary-color);
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-date {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.timeline-content p {
    color: var(--text-secondary);
}

.interests {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.interests h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    background-color: var(--primary-light);
    color: white;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

/* ===== 项目展示区域样式 ===== */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.project-image {
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tags span {
    background-color: var(--primary-light);
    color: white;
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ===== 社交媒体卡片样式 ===== */
.social-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.social-card {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.social-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    background-color: var(--primary-light);
    color: white;
}

.social-card:hover .social-icon {
    background-color: white;
    color: var(--primary-color);
}

.social-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 20px;
    transition: var(--transition);
}

.social-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.social-card p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    flex-grow: 1;
}

.social-card:hover p {
    color: rgba(255, 255, 255, 0.9);
}

.social-link {
    font-weight: 600;
    color: var(--primary-color);
    transition: var(--transition);
}

.social-card:hover .social-link {
    color: white;
}

/* ===== 技能展示区域样式 ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.skill-item {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.skill-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.skill-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.skill-item h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.skill-item p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.skill-level {
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 5px;
    transition: width 1.5s ease;
}

/* ===== 联系我区域样式 ===== */
.contact-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-option {
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    border: none;
    font-family: inherit;
}

.contact-option:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    background-color: var(--primary-light);
    color: white;
}

.contact-option:hover .contact-icon {
    background-color: white;
    color: var(--primary-color);
}

.contact-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 20px;
    transition: var(--transition);
}

.contact-option h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.contact-option p {
    color: var(--text-secondary);
}

.contact-option:hover p {
    color: rgba(255, 255, 255, 0.9);
}

/* ===== 模态框样式 ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    padding: 20px; /* 添加内边距避免挤压 */
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 40px 30px; /* 调整内边距 */
    max-width: 400px;
    width: 90%; /* 改为百分比宽度，更灵活 */
    max-height: 90vh; /* 限制最大高度 */
    overflow-y: auto; /* 允许滚动 */
    text-align: center;
    position: relative;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transform: translateY(-50px);
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    z-index: 1; /* 确保在二维码上方 */
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal-content h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    width: 100%;
}

.qr-code {
    margin: 20px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.qr-code img {
    width: 200px;
    height: 200px;
    max-width: 100%; /* 确保不超过容器 */
    border-radius: 10px;
    object-fit: contain; /* 保持图片比例 */
}

.modal-content p {
    color: var(--text-secondary);
    width: 100%;
    margin-top: 10px;
}

/* ===== 页脚样式 ===== */
.footer {
    background-color: var(--surface-color);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-logo span {
    color: var(--primary-color);
}

.footer-description {
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.footer-social a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--frosted-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--frosted-glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: var(--transition);
    text-decoration: none;
}

.footer-social a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.footer-legal-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-legal-link:hover {
    color: var(--primary-color);
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-image {
        order: -1;
        justify-self: center;
    }
    
    .avatar {
        max-width: 280px;
        height: 280px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links, .theme-toggle {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .project-filters {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    .footer-links, .footer-legal {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .footer-legal span {
        display: none;
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .footer-filing {
        gap: 10px;
    }
    
    .filing-item {
        flex-direction: column;
        text-align: center;
        gap: 5px;
    }
    
    /* 模态框移动端响应式 */
    .modal {
        padding: 10px;
    }
    
    .modal-content {
        padding: 30px 20px;
        width: 95%; /* 在小屏幕上更宽一些 */
        max-width: 350px; /* 适当调整最大宽度 */
    }
    
    .modal-close {
        top: 10px;
        right: 15px;
        font-size: 1.8rem;
    }
    
    .modal-content h3 {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    
    .qr-code img {
        width: 180px;
        height: 180px;
    }
}

@media (max-width: 576px) {
    .avatar {
        max-width: 240px;
        height: 240px;
    }
    
    /* 更小的模态框 */
    .modal-content {
        padding: 25px 15px;
        max-width: 300px;
    }
    
    .modal-content h3 {
        font-size: 1.4rem;
    }
    
    .qr-code img {
        width: 160px;
        height: 160px;
    }
}

@media (max-width: 400px) {
    .avatar {
        max-width: 200px;
        height: 200px;
    }
    
    .modal-content {
        padding: 20px 15px;
        max-width: 280px;
    }
    
    .qr-code img {
        width: 140px;
        height: 140px;
    }
    
    .modal-content h3 {
        font-size: 1.3rem;
    }
}

    /* ===== 页脚备案信息样式 ===== */
.footer-filing {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.filing-item {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.filing-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.filing-item a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* 防止模态框内容过长 */
.modal-content {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* 确保关闭按钮在非常小的屏幕上也能点击 */
@media (max-width: 320px) {
    .modal-close {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        top: 5px;
        right: 5px;
    }
}