/* 济南兰台芳华档案科技有限公司 - 主样式 */
:root {
    --primary-color: #1a56db;    /* 主蓝色 - 专业、信任 */
    --secondary-color: #0e9f6e;  /* 辅助绿色 - 成长、环保 */
    --accent-color: #7e3af2;     /* 强调紫色 - 创新、数字 */
    --dark-color: #1f2937;       /* 深色 - 文字 */
    --light-color: #f9fafb;      /* 浅色 - 背景 */
    --gray-color: #6b7280;       /* 灰色 - 次要文字 */
    --border-color: #e5e7eb;     /* 边框色 */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', 'PingFang SC', sans-serif;
    color: var(--dark-color);
    line-height: 1.6;
    background-color: var(--light-color);
}

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

/* 头部样式 */
.header {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.logo-text p {
    font-size: 0.9rem;
    color: var(--gray-color);
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

/* Banner样式 */
.banner {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 80px 0;
    text-align: center;
}

.banner h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.banner p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
}

.cta-button {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 服务区域 */
.services {
    padding: 80px 0;
    background: white;
}

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

.section-title h2 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

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

.service-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--gray-color);
    margin-bottom: 20px;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    background: var(--light-color);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.about-features {
    margin-top: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.feature-icon {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

/* 案例展示 */
.cases {
    padding: 80px 0;
    background: white;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.case-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.case-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.case-info {
    padding: 20px;
}

.case-info h4 {
    margin-bottom: 10px;
    color: var(--dark-color);
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: var(--light-color);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-icon {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
}

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

.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #1546b8;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 50px 0 20px;
}

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

.footer-section h4 {
    margin-bottom: 20px;
    color: white;
}

.footer-links a {
    display: block;
    color: #d1d5db;
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .banner h2 {
        font-size: 2rem;
    }
    
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
}