/* 全局样式 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    color: #333;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
}

.section-heading {
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

.section-heading:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

.text-center .section-heading:after {
    left: 50%;
    margin-left: -25px;
}

/* 导航栏样式 */
.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
}

.navbar-light .navbar-nav .nav-link {
    color: var(--dark-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.navbar-light .navbar-nav .nav-link:hover,
.navbar-light .navbar-nav .nav-link.active {
    color: var(--primary-color);
}

/* 首页横幅 */
.hero-section {
    position: relative;
    background: url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80') no-repeat center center;
    background-size: cover;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    color: white;
    padding-top: 80px;
}

.hero-section .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    animation: fadeInDown 1s ease-out;
}

.hero-section .lead {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
}

.hero-section .btn {
    animation: fadeIn 1.5s ease-out;
}

@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);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 服务卡片 */
.card {
    border: none;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card-body {
    padding: 2rem 1.5rem;
}

/* 项目卡片 */
.project-card {
    height: 100%;
}

.project-card img {
    height: 200px;
    object-fit: cover;
}

.badge {
    padding: 0.5em 0.8em;
    font-weight: 500;
}

/* 联系表单 */
.contact-form .form-control {
    padding: 0.8rem 1rem;
    border-radius: 4px;
    border: 1px solid #ddd;
}

.contact-form .form-control:focus {
    box-shadow: none;
    border-color: var(--primary-color);
}

.contact-form button {
    padding: 0.8rem 2rem;
}

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

/* 按钮样式 */
.btn {
    border-radius: 4px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
}

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

.btn-primary:hover, .btn-primary:focus {
    background-color: #2980b9;
    border-color: #2980b9;
}

/* 页脚样式 */
footer {
    background-color: var(--secondary-color);
}

footer a {
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.social-icons a {
    display: inline-block;
    margin-right: 10px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-section {
        height: auto;
        min-height: 500px;
        padding: 100px 0;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section .lead {
        font-size: 1.2rem;
    }
    
    .section-heading {
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .contact-form {
        margin-top: 2rem;
    }
}