/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2b78ff;
    --secondary-color: #3b9cff;
    --accent-color: #00c2ff;
    --dark-color: #1a1a2e;
    --light-color: #ffffff;
    --gray-color: #eaeaea;
    --text-color: #333333;
    --text-light: #777777;
    --gradient-bg: linear-gradient(135deg, #33007b 0%, #3b58d7 100%);
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f8f8f8;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.header {
    background-color: var(--light-color);
    padding: 20px 0;
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

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

.logo-img {
    height: 70px;
    width: auto;
}

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

.main-nav a {
    font-weight: 500;
    color: var(--text-color);
    padding: 10px 0;
    position: relative;
}

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

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

.main-nav a.active:after,
.main-nav a:hover:after {
    width: 100%;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

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

.contact-btn .btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* 英雄区域 */
.hero {
    background: var(--gradient-bg);
    color: white;
    padding: 160px 0 100px;
    text-align: center;
}

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

.hero-logo {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
}

.hero-logo-img {
    height: 140px;
    width: auto;
}

.hero h2 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

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

.btn-primary:hover {
    background-color: var(--gray-color);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* 公司优势 */
.company-strengths {
    padding: 100px 0;
    background-color: var(--dark-color);
    color: white;
}

.company-strengths .section-title,
.company-strengths .section-desc {
    color: white;
}

.strengths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.strength-card {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 30px;
    transition: var(--transition);
}

.strength-card:hover {
    transform: translateY(-10px);
    background-color: rgba(255, 255, 255, 0.2);
}

.strength-icon {
    font-size: 36px;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.strength-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: white;
}

.strength-card p {
    color: rgba(255, 255, 255, 0.8);
}

/* 服务 */
.services {
    padding: 100px 0;
    background-color: var(--light-color);
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-desc {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 60px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.service-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.service-icon {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

.service-card p {
    color: var(--text-light);
}

/* 技术栈展示 */
.tech-stack {
    padding: 100px 0;
    background: var(--gradient-bg);
    color: white;
}

.tech-categories {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.tech-stack .section-title,
.tech-stack .section-desc {
    color: white;
}

.tech-category h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: white;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tech-category h3 i {
    color: var(--primary-color);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.tech-tag {
    display: inline-block;
    padding: 8px 16px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    box-shadow: var(--shadow);
    font-weight: 500;
    color: white;
    transition: var(--transition);
}

.tech-tag:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 为什么选择我们 */
.why-us {
    padding: 100px 0;
    background-color: var(--light-color);
}

.why-us-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.why-us h2 {
    margin-bottom: 25px;
    text-align: center;
}

.why-us p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.why-us-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.feature-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-card p {
    color: var(--text-light);
    font-size: 16px;
    margin-bottom: 0;
    line-height: 1.6;
}

/* 开发流程 */
.dev-process {
    padding: 100px 0;
    background: var(--gradient-bg);
    color: white;
}

.dev-process .section-title,
.dev-process .section-desc {
    color: white;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 800px;
    margin: 50px auto 0;
}

.process-step {
    display: flex;
    gap: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 20px;
    transition: var(--transition);
    position: relative;
}

.process-step:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.step-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-color);
    min-width: 40px;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.step-content p {
    opacity: 0.9;
    font-size: 16px;
}

/* 我们的优势 */
.advantages {
    padding: 100px 0;
    background-color: var(--light-color);
}

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

.advantage-image {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.advantage-text h2 {
    margin-bottom: 25px;
    text-align: left;
}

.advantage-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-light);
}

/* 团队服务 */
.team-service {
    padding: 100px 0;
    background-color: var(--gray-color);
}

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

.team-service-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.team-service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.team-service-card .service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
}

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

.team-service-card p {
    color: var(--text-light);
}

/* 行业洞察 */
.industry-insights {
    padding: 100px 0;
    background-color: var(--gray-color);
    color: var(--text-color);
}

.industry-insights .section-title,
.industry-insights .section-desc {
    color: var(--dark-color);
}

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

.insight-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.insight-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.insight-icon {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

.insight-card p {
    color: var(--text-light);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--gradient-bg);
    color: white;
    text-align: center;
}

.contact .section-title,
.contact .section-desc {
    color: white;
}

.contact-form {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.contact-form input {
    width: 300px;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
}

.contact-form .btn {
    background-color: white;
    color: var(--primary-color);
}

.contact-form .btn:hover {
    background-color: var(--gray-color);
    transform: translateY(-2px);
}

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 70px 0 20px;
}

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

.footer-column h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.footer-column p {
    margin-bottom: 10px;
    opacity: 0.7;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    opacity: 0.7;
}

.footer-column a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    opacity: 0.7;
    font-size: 14px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: white;
    opacity: 1;
}

.footer-logo {
    height: 80px;
    width: auto;
    margin-bottom: 15px;
    display: block;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .why-us-content,
    .advantage-content {
        grid-template-columns: 1fr;
    }
    
    .hero h2 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 30px;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 20px;
    }
    
    .main-nav ul {
        gap: 15px;
    }
    
    .hero {
        padding: 180px 0 80px;
    }

    .hero-logo-img {
        height: 110px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .contact-form {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-form input {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 576px) {
    .logo-img {
        height: 55px;
    }

    .hero-logo-img {
        height: 90px;
    }

    .footer-logo {
        height: 65px;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .services-grid,
    .team-services-grid,
    .strengths-grid,
    .insights-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}