/* 全局样式 */
:root {
    --primary-color: #0a6ebd;
    --secondary-color: #ff6b6b;
    --dark-color: #2c3e50;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --success-color: #28a745;
    --border-color: #dee2e6;
    --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: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

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;
    background: var(--primary-color);
    color: #fff;
    padding: 12px 25px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn:hover {
    background: #085a9d;
    transform: translateY(-3px);
}

.section-padding {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 3px;
    background: var(--primary-color);
}

.section-header p {
    color: var(--gray-color);
    font-size: 1.1rem;
}

/* 导航栏 */
header {
    background: #fff;
    box-shadow: var(--box-shadow);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 15px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

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

nav ul {
    display: flex;
}

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

nav ul li a {
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: 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: 1.5rem;
    cursor: pointer;
}

/* 轮播图 */
.hero {
    background:  url('../images/hero.jpg');
    height: 100vh;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    text-align: center;
    color: #fff;
    margin-top: 80px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    animation: fadeInUp 1s ease;
}

.hero-content .btn {
    animation: fadeInUp 1.5s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 关于我们 */
.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-img {
    flex: 1;
    box-shadow: var(--box-shadow);
    border-radius: 5px;
    overflow: hidden;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 15px;
}

.stats {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

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

.stat-item h4 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

/* 业务服务 */
.services-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

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

.service-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

/* 成功案例 */
.case-filter {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.filter-btn {
    background: none;
    border: none;
    padding: 8px 15px;
    margin: 0 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
    color: var(--primary-color);
    font-weight: 500;
}

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

.case-item {
    position: relative;
    border-radius: 5px;
    overflow: hidden;
    height: 250px;
    cursor: pointer;
}

.case-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 110, 189, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
    padding: 20px;
    opacity: 0;
    transition: var(--transition);
}

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

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

.case-overlay h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

/* 联系我们 */
.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
}

.contact-item .icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 1.5rem;
    margin-right: 15px;
}

.contact-item .text h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.contact-form form {
    display: grid;
    gap: 15px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

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

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

/* 页脚 */
footer {
    background: var(--dark-color);
    color: #fff;
    padding: 70px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.footer-logo h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

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

.social-links {
    display: flex;
    margin-top: 15px;
}

.social-links a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    margin-right: 10px;
    color: #fff;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links h3,
.footer-services h3,
.footer-newsletter h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3::after,
.footer-services h3::after,
.footer-newsletter h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--primary-color);
}

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

.footer-links ul li a,
.footer-services ul li a {
    color: #aaa;
    transition: var(--transition);
}

.footer-links ul li a:hover,
.footer-services ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-newsletter p {
    color: #aaa;
    margin-bottom: 15px;
}

.footer-newsletter form {
    display: flex;
}

.footer-newsletter input {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: 4px 0 0 4px;
    font-size: 1rem;
    font-family: inherit;
}

.footer-newsletter button {
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 0 15px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: var(--transition);
}

.footer-newsletter button:hover {
    background: #085a9d;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        flex-direction: column;
    }
    
    .menu-toggle {
        display: block;
    }
    
    nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;
        padding: 20px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: var(--transition);
    }
    
    nav.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav ul li {
        margin: 10px 0;
        margin-left: 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .stats {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .case-filter {
        flex-wrap: wrap;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}