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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --background: #ffffff;
    --surface: #f9fafb;
    --border: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

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

.nav-logo h2 {
    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-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* 主页部分 */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* 打字机效果 */
.cursor {
    animation: blink 1s infinite;
    color: var(--primary-color);
    font-weight: 700;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

#typewriter {
    min-height: 1.5em;
    display: inline-block;
}

/* 个人资料卡片 */
.profile-card {
    position: relative;
    text-align: center;
}

.profile-avatar {
    font-size: 8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    width: 150px;
    height: 150px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.floating-element {
    position: absolute;
    font-size: 2rem;
    color: var(--accent-color);
    animation: float 4s ease-in-out infinite;
    animation-delay: var(--delay);
}

.floating-element:nth-child(1) { top: 10%; left: 10%; }
.floating-element:nth-child(2) { top: 20%; right: 10%; }
.floating-element:nth-child(3) { bottom: 20%; left: 15%; }
.floating-element:nth-child(4) { bottom: 10%; right: 15%; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* 主页背景装饰 */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    animation: floatShape 20s infinite linear;
}

.shape-1 {
    width: 100px;
    height: 100px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 20%;
    animation-delay: 5s;
}

.shape-3 {
    width: 80px;
    height: 80px;
    bottom: 20%;
    left: 20%;
    animation-delay: 10s;
}

.shape-4 {
    width: 120px;
    height: 120px;
    top: 30%;
    right: 10%;
    animation-delay: 15s;
}

@keyframes floatShape {
    0% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
    25% { transform: translateY(-20px) rotate(90deg); opacity: 0.6; }
    50% { transform: translateY(-40px) rotate(180deg); opacity: 0.3; }
    75% { transform: translateY(-20px) rotate(270deg); opacity: 0.6; }
    100% { transform: translateY(0) rotate(360deg); opacity: 0.3; }
}

/* 统计项图标 */
.stat-item {
    text-align: center;
    position: relative;
}

.stat-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-icon i {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 技能部分 */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
}

.skill-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

.skill-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 技能背景装饰 */
.skills {
    position: relative;
}

.skills-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.tech-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.05;
}

.tech-pattern i {
    position: absolute;
    font-size: 3rem;
    color: var(--primary-color);
    animation: techFloat 15s infinite ease-in-out;
}

.tech-pattern i:nth-child(1) { top: 10%; left: 5%; animation-delay: 0s; }
.tech-pattern i:nth-child(2) { top: 20%; right: 10%; animation-delay: 2s; }
.tech-pattern i:nth-child(3) { top: 40%; left: 15%; animation-delay: 4s; }
.tech-pattern i:nth-child(4) { top: 60%; right: 20%; animation-delay: 6s; }
.tech-pattern i:nth-child(5) { bottom: 30%; left: 10%; animation-delay: 8s; }
.tech-pattern i:nth-child(6) { bottom: 20%; right: 15%; animation-delay: 10s; }
.tech-pattern i:nth-child(7) { top: 80%; left: 25%; animation-delay: 12s; }
.tech-pattern i:nth-child(8) { top: 70%; right: 5%; animation-delay: 14s; }

@keyframes techFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(5deg); }
    50% { transform: translateY(-5px) rotate(-5deg); }
    75% { transform: translateY(-15px) rotate(3deg); }
}

.skills .container {
    position: relative;
    z-index: 1;
}

/* 通用部分样式 */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 关于部分 */
.about {
    background: var(--surface);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    position: relative;
}

.stat-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-icon i {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 联系部分 */
.contact {
    background: var(--surface);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
    text-align: left;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 2rem;
    min-width: 2rem;
    text-align: center;
    flex-shrink: 0;
}

.contact-item div {
    flex: 1;
}

.contact-item h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .contact-item i {
        width: auto;
        min-width: auto;
    }
    
    .profile-avatar {
        width: 120px;
        height: 120px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 6rem 0 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .profile-avatar {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 768px) {
    .code-decoration {
        display: none;
    }
    
    .floating-shape {
        display: none;
    }
    
    .tech-pattern {
        display: none;
    }

    .tech-pattern {
        display: none;
    }
}