/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 容器样式 */
.container {
    width: 80%;
    margin: 0 auto;
    padding: 20px 0;
}

/* 头部导航样式 */
header {
    background-color: #2c3e50;
    color: #fff;
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 80%;
    margin: 0 auto;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

nav ul {
    display: flex;
    list-style: none;
}

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

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #3498db;
}

/* 主要内容区域样式 */
main {
    margin-top: 80px;
    padding: 20px 0;
}

/* 通用标题样式 */
h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
    font-size: 32px;
}

h3 {
    margin: 20px 0 15px;
    color: #34495e;
    font-size: 24px;
}

h4 {
    margin: 15px 0 10px;
    color: #34495e;
    font-size: 18px;
}

/* 公司介绍样式 */
.company-intro {
    background-color: #fff;
    padding: 40px 0;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.intro-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.intro-text {
    flex: 1;
    font-size: 16px;
    line-height: 1.8;
}

.intro-image {
    flex: 1;
    text-align: center;
}

.intro-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 公司服务样式 */
.company-services {
    background-color: #fff;
    padding: 40px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.service-item {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.service-item h3 {
    color: #3498db;
    margin-bottom: 15px;
    font-size: 20px;
}

.service-item ul {
    margin-left: 20px;
    margin-top: 15px;
}

.service-item li {
    margin-bottom: 8px;
    line-height: 1.6;
    font-size: 14px;
}

.company-mission {
    margin-top: 20px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.company-mission ul {
    margin-left: 20px;
}

.company-mission li {
    margin-bottom: 10px;
    line-height: 1.6;
}

/* 关于我们样式 */
.about {
    background-color: #fff;
    padding: 40px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.about-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 1;
    text-align: center;
}

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.values-list {
    margin-left: 20px;
    margin-bottom: 20px;
}

.values-list li {
    margin-bottom: 10px;
    line-height: 1.6;
}

/* 关于我们页面样式 */
.about-section {
    margin: 40px 0;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

/* 时间线样式 */
.timeline {
    position: relative;
    margin: 20px 0;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #3498db;
}

.timeline-item {
    position: relative;
    margin-bottom: 20px;
    padding-left: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #3498db;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px #3498db;
}

.timeline-year {
    display: inline-block;
    background-color: #3498db;
    color: #fff;
    padding: 5px 10px;
    border-radius: 15px;
    font-weight: bold;
    margin-right: 10px;
    font-size: 14px;
}

.timeline-event {
    font-size: 16px;
    color: #34495e;
}

/* 导师展示样式 */
.mentors-section {
    margin: 30px 0;
}

.mentors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.mentor-item {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mentor-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.mentor-item h5 {
    margin: 0 0 10px;
    color: #3498db;
    font-size: 18px;
}

.mentor-item p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    color: #666;
}

/* 未来展望样式 */
.future-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.future-content p {
    margin: 15px 0;
    line-height: 1.8;
    font-size: 16px;
    color: #34495e;
}

/* 招贤纳士样式 */
.careers {
    background-color: #fff;
    padding: 40px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.careers-intro {
    text-align: center;
    font-size: 18px;
    margin-bottom: 40px;
    color: #555;
}

.job-listings {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.job-item {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.job-info {
    margin: 10px 0 20px;
    color: #666;
    font-size: 14px;
}

.job-location, .job-type {
    margin-right: 20px;
    padding: 5px 10px;
    background-color: #e9ecef;
    border-radius: 15px;
}

.job-item ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.job-item li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.application-info {
    margin-top: 40px;
    padding: 20px;
    background-color: #e3f2fd;
    border-radius: 8px;
    border-left: 5px solid #2196f3;
}

/* 下载页面样式 */
.download {
    background-color: #fff;
    padding: 60px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.download-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
}

.download-info {
    flex: 1;
}

.download-info h2 {
    font-size: 48px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.app-version {
    font-size: 16px;
    color: #666;
    margin-bottom: 10px;
    font-weight: 500;
}

.download-slogan {
    font-size: 24px;
    color: #3498db;
    margin-bottom: 20px;
    font-weight: bold;
}

.development-notice {
    display: flex;
    align-items: center;
    background-color: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 20px;
    font-weight: 500;
}

.notice-icon {
    font-size: 24px;
    margin-right: 10px;
}

.notice-text {
    color: #856404;
    font-size: 16px;
}

.download-description {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
}

.download-btn {
    display: flex;
    align-items: center;
    padding: 15px 30px;
    border-radius: 12px;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    min-width: 200px;
}

.download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.download-btn.disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.download-btn.disabled:hover {
    transform: none;
    box-shadow: none;
}

.ios-btn {
    background-color: #000;
    color: #fff;
}

.android-btn {
    background-color: #4285f4;
    color: #fff;
}

.btn-icon {
    font-size: 36px;
    margin-right: 15px;
}

.btn-text {
    display: flex;
    flex-direction: column;
}

.btn-title {
    font-size: 18px;
    font-weight: bold;
}

.btn-subtitle {
    font-size: 12px;
    opacity: 0.8;
}

.download-features h3 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-item {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 36px;
    display: block;
    margin-bottom: 10px;
}

.feature-item h4 {
    margin: 10px 0;
    color: #3498db;
}

.feature-item p {
    font-size: 14px;
    color: #666;
    margin: 0;
}

.download-qr {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.qr-container {
    text-align: center;
}

.qr-image {
    background-color: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 15px;
}

.qr-image img {
    display: block;
    max-width: 200px;
    height: auto;
}

.qr-text {
    font-size: 16px;
    color: #555;
    margin: 0;
}

.app-preview {
    width: 100%;
    max-width: 300px;
}

.phone-mockup {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 30px;
    padding: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.phone-screen {
    background-color: #fff;
    border-radius: 20px;
    padding: 30px 20px;
    text-align: center;
}

.app-logo {
    font-size: 24px;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 10px;
}

.app-slogan {
    font-size: 14px;
    color: #666;
    margin-bottom: 30px;
}

.app-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.app-feature {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    font-size: 14px;
    color: #34495e;
    font-weight: 500;
}

/* 下载步骤样式 */
.download-steps {
    background-color: #f8f9fa;
    padding: 60px 0;
}

.download-steps h2 {
    text-align: center;
    margin-bottom: 50px;
    color: #2c3e50;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.step-item {
    text-align: center;
    background-color: #fff;
    padding: 30px 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.step-item:hover {
    transform: translateY(-10px);
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: #3498db;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step-item h3 {
    margin: 15px 0 10px;
    color: #2c3e50;
}

.step-item p {
    font-size: 14px;
    color: #666;
    margin: 0;
    line-height: 1.6;
}

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

footer a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        align-items: flex-start;
    }
    
    nav ul {
        margin-top: 15px;
        flex-direction: column;
    }
    
    nav ul li {
        margin: 10px 0;
    }
    
    .intro-content,
    .about-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    main {
        margin-top: 120px;
    }
    
    /* 下载页面响应式 */
    .download-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .download-info h2 {
        font-size: 32px;
    }
    
    .download-slogan {
        font-size: 20px;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .download-btn {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timeline::before {
        left: 5px;
    }
    
    .timeline-item::before {
        left: -20px;
    }
    
    .mentors-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        width: 90%;
    }
    
    h2 {
        font-size: 24px;
    }
    
    h3 {
        font-size: 20px;
    }
    
    .company-intro,
    .company-services,
    .about,
    .careers {
        padding: 20px 0;
    }
    
    .service-item,
    .job-item {
        padding: 20px;
    }
}