:root {
    --primary: #3a86ff;
    --primary-dark: #2a65cc;
    --secondary: #ff006e;
    --dark: #272343;
    --light: #ffffff;
    --gray: #8d99ae;
    --light-bg: #f8f9fa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: var(--dark);
    line-height: 1.6;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 导航栏 */
header {
    background: var(--light);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn {
    background: var(--primary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-block;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(58, 134, 255, 0.3);
}

/* Hero 区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(58, 134, 255, 0.1) 0%, rgba(255, 0, 110, 0.1) 100%);
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--gray);
}

/* 服务区域 */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--light);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.service-icon {
    font-size: 3rem;
    color: var(--primary);
    text-align: center;
    padding: 2rem 0 1rem;
}

.service-content {
    padding: 1.5rem 2rem 2rem;
}

.service-content h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* 特点区域 */
.features {
    background: var(--light-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.feature-icon {
    background: var(--primary);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.feature-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

/* 案例展示 */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    height: 250px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(58, 134, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    opacity: 0;
    transition: opacity 0.3s;
    padding: 1rem;
    text-align: center;
}

.portfolio-item:hover .portfolio-img {
    transform: scale(1.1);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

/* 联系区域 */
.contact {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.contact .section-header h2,
.contact .section-header p {
    color: white;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #e1e1e1;
    border-radius: 5px;
    font-size: 1rem;
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.btn-submit {
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    transition: background 0.3s;
}

.btn-submit:hover {
    background: var(--primary-dark);
}

/* 页脚 */
footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-brand p {
    margin: 1rem 0;
}

.footer-links h3,
.footer-contact h3 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    transition: color 0.3s;
}

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

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.footer-contact i {
    color: var(--primary);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 2rem;
    }
}