/* 基础样式与CSS变量 */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #1a1a1a;
    --text-primary: #1d1d1f;
    --text-secondary: #6c757d;
    --accent-color: #4361ee;
    --accent-light: #e7ecff;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 20px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #3651d4;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.2);
}

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

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

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 60px;
}

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

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

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

/* 作品集部分 */
.portfolio {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 4rem;
}

.work-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    background-color: transparent;
    border: 1px solid #ddd;
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 40px;
}

.work-item {
    background: var(--bg-primary);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
    cursor: pointer;
}

.work-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.work-image {
    width: 100%;
    height: 240px;
    background: linear-gradient(120deg, #4361ee 0%, #3a0ca3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.9);
    font-size: 1.5rem;
    font-weight: 600;
}

.work-content {
    padding: 25px;
}

.work-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--accent-light);
    color: var(--accent-color);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.work-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.work-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.work-link {
    color: var(--accent-color);
    font-weight: 500;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.work-link:hover {
    gap: 10px;
}

/* 关于部分 */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    height: 400px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
}

.about-text h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.skills {
    margin-top: 2rem;
}

.skill-item {
    margin-bottom: 1.5rem;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.skill-name {
    font-weight: 500;
}

.skill-percent {
    color: var(--accent-color);
    font-weight: 600;
}

.skill-bar {
    height: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 4px;
}

/* 其他部分 */
.other {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

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

.other-card {
    background: var(--bg-primary);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.other-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.other-icon {
    width: 60px;
    height: 60px;
    background-color: var(--accent-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.other-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.other-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 返回按钮 */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-color);
    font-weight: 500;
    margin-top: 2rem;
}

/* 页脚 */
footer {
    padding: 60px 0 30px;
    background-color: var(--bg-dark);
    color: rgba(255,255,255,0.8);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-top: 1px solid rgba(0,0,0,0.05);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 120px 0 60px;
        text-align: center;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .work-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .work-filter {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .btn {
        padding: 12px 24px;
        width: 100%;
        justify-content: center;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}