/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 首页英雄区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    text-align: center;
    position: relative;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.highlight {
    color: #ffd700;
    position: relative;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-down span {
    font-size: 2rem;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-20px) translateX(-50%);
    }
    60% {
        transform: translateY(-10px) translateX(-50%);
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 1s ease-in;
}

.fade-in-delay {
    animation: fadeIn 1s ease-in 0.3s backwards;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-in 0.6s backwards;
}

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

/* 通用部分样式 */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* 关于我部分 */
.about {
    background: var(--light-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.image-placeholder svg {
    width: 150px;
    height: 150px;
    color: var(--white);
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.info-grid {
    margin-top: 2rem;
    display: grid;
    gap: 1rem;
}

.info-item {
    display: flex;
    gap: 0.5rem;
}

.info-item strong {
    color: var(--primary-color);
}

/* 技能部分 */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.skill-card p {
    color: #666;
}

/* 联系我部分 */
.contact {
    background: var(--light-bg);
}

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

.contact-content > p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 2rem;
    background: var(--white);
    border-radius: 15px;
    text-decoration: none;
    color: var(--text-color);
    min-width: 150px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.contact-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.contact-btn span:first-child {
    font-size: 2.5rem;
}

.contact-btn span:last-child {
    font-weight: 600;
}

/* 页脚 */
.footer {
    background: #2d3748;
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    margin: 0.5rem 0;
}

.footer-note {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .image-placeholder {
        width: 200px;
        height: 200px;
    }
    
    .image-placeholder svg {
        width: 120px;
        height: 120px;
    }
}