/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #ffffff;
    --text-color: #333333;
    --card-bg: #f8f9fa;
    --border-color: #e9ecef;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: var(--transition);
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--background-color);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo span {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    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);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.tutorial-link {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.2rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tutorial-link:hover {
    background-color: var(--card-bg);
    color: var(--primary-color);
    transform: scale(1.1);
}

.theme-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-btn:hover {
    background-color: var(--card-bg);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* 主要内容 */
main {
    margin-top: 80px;
}

.section {
    padding: 4rem 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

/* 首页英雄区域 */
.hero {
    text-align: center;
    padding: 2rem 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.avatar {
    margin-bottom: 2rem;
}

.avatar img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow);
}

#hero-name {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

#hero-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

#hero-description {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* 关于部分 */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: center;
}

.skills h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.skill-tag {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.skill-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* 项目网格 */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.project-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.project-links a:hover {
    text-decoration: underline;
}

/* 网站网格 */
.websites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.website-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-color);
}

.website-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    color: var(--primary-color);
}

.website-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.website-card h3 {
    margin-bottom: 0.5rem;
}

.website-card p {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* 联系部分 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--card-bg);
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    width: 20px;
}

.social-links h3 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background-color: var(--card-bg);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    color: var(--primary-color);
}

.social-link i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* 页脚 */
.footer {
    background-color: var(--card-bg);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

/* 主题选择器 */
.theme-selector {
    position: fixed;
    top: 50%;
    right: -300px;
    transform: translateY(-50%);
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 1001;
}

.theme-selector.show {
    right: 20px;
}

.theme-selector h3 {
    margin-bottom: 1rem;
    text-align: center;
}

.theme-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.theme-option {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
}

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

.theme-option.active {
    background-color: var(--primary-color);
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--background-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .projects-grid,
    .websites-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    #hero-name {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .nav-container {
        padding: 1rem;
    }

    .section {
        padding: 2rem 0;
    }

    .theme-selector {
        right: -280px;
    }

    .theme-selector.show {
        right: 10px;
    }
}