/* 全局样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #004d99;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --dark-gray: #666;
    --white: #fff;
}

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

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

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

/* 导航栏样式 */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 24px;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li a {
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 15px;
    transition: color 0.3s;
}

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

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

/* 首页横幅样式 */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white);
    padding-top: 80px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    padding: 15px 30px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.cta-button:hover {
    background: var(--secondary-color);
}

/* 服务卡片样式 */
.services {
    padding: 80px 0;
    background: var(--light-gray);
}

.services h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
}

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

.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

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

.service-card i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    font-size: 24px;
}

.service-button {
    display: inline-block;
    padding: 10px 20px;
    margin-top: 20px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.service-button:hover {
    background: var(--secondary-color);
}

/* 联系方式样式 */
.contact {
    padding: 80px 0;
    background: var(--light-gray);
}

.contact h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
}

.contact-info {
    max-width: 800px;
    margin: 0 auto;
}

.contact-details {
    display: grid;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item i {
    font-size: 30px;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-text h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.contact-text p {
    font-size: 18px;
    margin-bottom: 5px;
}

.contact-desc {
    color: var(--dark-gray);
    font-size: 14px !important;
}

/* 响应式设计补充 */
@media (max-width: 768px) {
    .contact-info {
        padding: 0 20px;
    }

    .contact-item {
        padding: 20px;
    }

    .contact-text h3 {
        font-size: 18px;
    }

    .contact-text p {
        font-size: 16px;
    }
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-info h3 {
    margin-bottom: 15px;
}

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

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

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

.about h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

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

.about-text p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature i {
    color: var(--primary-color);
    font-size: 24px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: center;
}

.stat-item h4 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 16px;
    color: var(--dark-gray);
}

/* 客户案例样式 */
.cases {
    padding: 80px 0;
    background: var(--light-gray);
}

.cases h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
}

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

.case-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.case-content {
    padding: 30px;
}

.case-content h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.case-type {
    color: var(--dark-gray);
    font-size: 16px;
    margin-bottom: 15px;
}

.case-desc {
    margin-bottom: 20px;
    line-height: 1.6;
}

.case-result {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.case-result i {
    color: #28a745;
}

/* FAQ样式 */
.faq {
    padding: 80px 0;
    background: var(--white);
}

.faq h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
}

.faq-grid {
    display: grid;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--light-gray);
    border-radius: 10px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background 0.3s;
}

.faq-question:hover {
    background: #e8e8e8;
}

.faq-question h3 {
    font-size: 18px;
    margin: 0;
}

.faq-question i {
    font-size: 20px;
    color: var(--primary-color);
    transition: transform 0.3s;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease-out;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 1000px;
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu {
        display: block;
    }

    .hero h1 {
        font-size: 36px;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-grid {
        grid-template-columns: 1fr;
    }

    .faq-question h3 {
        font-size: 16px;
    }
}