/* 全局样式 */
:root {
    --primary-color: #1e50a2;
    --secondary-color: #ff6b6b;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: var(--dark-color);
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #1a4590;
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
}

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

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.underline {
    height: 4px;
    width: 70px;
    background-color: var(--primary-color);
    margin: 0 auto;
}

section {
    padding: 80px 0;
}

/* 导航栏样式 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--box-shadow);
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

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

.logo h1 {
    font-size: 28px;
    color: var(--primary-color);
    font-weight: 700;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary-color);
}

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

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* 主页横幅样式 */
.hero {
    height: 100vh;
    width: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)), url('../images/hero-bg.webp') no-repeat center center/cover;
    background-attachment: fixed;
    color: #fff;
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

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

.hero-content h1 {
    font-size: 56px;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease;
}

.hero-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
    animation: fadeInDown 1.2s ease;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
    animation: fadeInUp 1.4s ease;
}

.cta-buttons {
    animation: fadeInUp 1.6s ease;
}

.cta-buttons .btn {
    margin: 0 10px;
}

/* 关于我们样式 */
.about {
    background-color: var(--light-color);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 20px;
    font-size: 16px;
}

.company-values {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
}

.value-item {
    text-align: center;
    flex: 1;
    padding: 0 15px;
}

.value-item i {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.value-item h4 {
    font-size: 20px;
    margin-bottom: 10px;
}

.about-image {
    flex: 1;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

/* 服务内容样式 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
}

.service-icon {
    width: 80px;
    height: 80px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
}

.service-icon i {
    font-size: 36px;
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.service-card p {
    font-size: 15px;
}

/* 成功案例样式 */
.cases {
    background-color: var(--light-color);
}

.cases-slider {
    position: relative;
    overflow: hidden;
}

.case-item {
    display: flex;
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.case-image {
    flex: 1;
    min-height: 400px;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-content {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-content h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.case-content p {
    font-size: 16px;
}

.cases-nav {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

.cases-nav span {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 10px;
    cursor: pointer;
    transition: var(--transition);
}

.cases-nav span:hover {
    background-color: #1a4590;
}

/* 联系我们样式 */
.contact-content {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.info-item {
    margin-bottom: 30px;
}

.info-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.info-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.social-media {
    margin-top: 40px;
}

.social-media a {
    display: inline-block;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    transition: var(--transition);
}

.social-media a:hover {
    background-color: #1a4590;
    transform: translateY(-5px);
}

.contact-form {
    flex: 1;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 16px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #fff;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: #ddd;
}

.footer-links ul li a:hover {
    color: #fff;
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 10px;
    color: #ddd;
}

.footer-contact p i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 动画效果 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content,
    .contact-content {
        flex-direction: column;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-item {
        flex-direction: column;
    }
    
    .case-image {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 80%;
        height: calc(100vh - 70px);
        background-color: #fff;
        flex-direction: column;
        padding: 40px;
        transition: var(--transition);
        box-shadow: var(--box-shadow);
    }
    
    nav.active {
        left: 0;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav ul li {
        margin: 15px 0;
    }
    
    .hero-content h1 {
        font-size: 40px;
    }
    
    .hero-content h2 {
        font-size: 28px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .company-values {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 576px) {
    .section-header h2 {
        font-size: 28px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content h2 {
        font-size: 24px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .cta-buttons .btn {
        display: block;
        width: 100%;
        margin: 10px 0;
    }
}