/* 基础样式 */
:root {
    --primary: #3498db;
    --secondary: #2c3e50;
    --light: #f8f9fa;
    --dark: #343a40;
    --success: #28a745;
}

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

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

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

.btn-secondary {
    border: 1px solid var(--primary);
    color: var(--primary);
}

/* 导航栏 */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    z-index: 1000;
}

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

.logo a {
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    color: var(--secondary);
}

.logo span {
    color: var(--primary);
}

.navbar ul {
    display: flex;
    list-style: none;
}

.navbar li {
    margin-left: 30px;
}

.navbar a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
}

.navbar a.active {
    color: var(--primary);
}

.btn-login {
    background: var(--primary);
    color: white !important;
    padding: 8px 20px;
    border-radius: 4px;
}

/* Banner区域 */
.banner {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.banner .container {
    display: flex;
    align-items: center;
}

.banner-content {
    flex: 1;
}

.banner h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.banner p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-group {
    display: flex;
    gap: 15px;
}

.banner-visual {
    flex: 1;
    position: relative;
    height: 300px;
}

.dashboard-preview {
    position: absolute;
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    padding: 20px;
    display: flex;
    align-items: flex-end;
    gap: 15px;
}

.chart-bar {
    flex: 1;
    background: var(--primary);
    border-radius: 4px 4px 0 0;
    position: relative;
}

.chart-bar::after {
    content: '';
    position: absolute;
    top: -20px;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(0,0,0,0.1);
}

.chart-line {
    position: absolute;
    top: 50%;
    left: 0;
    width: 80%;
    height: 2px;
    background: var(--success);
    transform: translateY(-50%);
}

.metric-box {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--light);
    padding: 15px;
    border-radius: 4px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.metric-box i {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 5px;
}

.metric-box strong {
    display: block;
    font-size: 1.5rem;
    color: var(--primary);
}

/* 功能区域 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2rem;
    color: var(--secondary);
}

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

.feature-card {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

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

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--secondary);
}

.feature-card ul {
    list-style: none;
}

.feature-card li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.feature-card li i {
    margin-right: 10px;
    color: var(--success);
}

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

.case-card {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.client-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
}

.logo-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.logo-circle i {
    font-size: 2rem;
    color: var(--primary);
}

.case-stats {
    display: flex;
    gap: 30px;
    margin: 20px 0;
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 1.8rem;
    color: var(--primary);
}

/* 演示区域 */
.demo {
    padding: 100px 0;
    background: var(--light);
}

.demo .container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.demo-content {
    flex: 1;
}

.demo h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--secondary);
}

.demo-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary);
}

.form-group input {
    width: 100%;
    padding: 12px 15px 12px 40px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.demo-visual {
    flex: 1;
    height: 300px;
    position: relative;
}

.screen-mockup {
    position: absolute;
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
}

.screen-header {
    height: 40px;
    background: var(--secondary);
}

.screen-content {
    padding: 20px;
}

.data-row {
    height: 15px;
    background: var(--light);
    margin-bottom: 15px;
    border-radius: 4px;
}

.data-row:nth-child(1) {
    width: 80%;
}

.data-row:nth-child(2) {
    width: 60%;
}

.data-row:nth-child(3) {
    width: 70%;
}

/* 联系区域 */
.contact {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary);
}

.info-item h4 {
    margin-bottom: 5px;
    color: var(--secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

/* 页脚 */
.footer {
    background: var(--secondary);
    color: white;
    padding: 60px 0 20px;
}

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

.footer-about .logo a {
    color: white;
}

.footer-about p {
    margin-top: 15px;
    opacity: 0.8;
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: white;
    opacity: 0.8;
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    color: white;
    font-size: 1.2rem;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.social-links a:hover {
    opacity: 1;
}

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

/* 在线咨询按钮 */
.chat-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    cursor: pointer;
    z-index: 999;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .banner .container,
    .demo .container {
        flex-direction: column;
    }
    
    .banner-visual,
    .demo-visual {
        margin-top: 50px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
}


/* 产品介绍页样式 */
.page-banner {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 150px 0 80px;
    text-align: center;
}

.product-features {
    padding: 80px 0;
}

.feature-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    border-bottom: 1px solid #eee;
}

.feature-tabs .tab {
    padding: 12px 30px;
    cursor: pointer;
    position: relative;
}

.feature-tabs .tab.active {
    color: var(--primary);
}

.feature-tabs .tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
}

.feature-content {
    display: none;
    align-items: center;
    gap: 50px;
}

.feature-content.active {
    display: flex;
}

.feature-visual {
    flex: 1;
    min-height: 400px;
    position: relative;
}

.warehouse-mockup {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--light);
    border-radius: 8px;
    padding: 30px;
    display: flex;
    gap: 20px;
}

.rack {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
    justify-content: space-around;
}

.bin {
    height: 80px;
    background: white;
    border: 2px dashed #ddd;
    border-radius: 4px;
    position: relative;
}

.bin.occupied {
    background: var(--primary);
    opacity: 0.7;
    border-color: var(--primary);
}

.bin.occupied::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border: 1px solid rgba(255,255,255,0.3);
}

.picker {
    position: absolute;
    width: 60px;
    height: 60px;
    background: var(--secondary);
    border-radius: 50%;
    bottom: 30px;
    right: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.picker::before {
    content: 'PDA';
    font-size: 12px;
}

.feature-detail {
    flex: 1;
}

.feature-detail h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--secondary);
}

.feature-detail h2 i {
    margin-right: 15px;
    color: var(--primary);
}

.feature-detail ul {
    list-style: none;
    margin-bottom: 30px;
}

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

.feature-detail li i {
    margin-right: 10px;
    color: var(--success);
}

/* 技术优势 */
.tech-advantages {
    padding: 60px 0;
    background: var(--light);
}

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

.advantage-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

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

/* 解决方案页样式 */
.industry-solutions {
    padding: 80px 0;
}

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

.solution-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.solution-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.solution-stats {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.solution-stats .stat {
    flex: 1;
    text-align: center;
    padding: 15px;
    background: var(--light);
    border-radius: 4px;
}

.solution-stats strong {
    display: block;
    font-size: 1.5rem;
    color: var(--primary);
}

/* 案例页样式 */
.case-filter {
    padding: 30px 0;
    background: var(--light);
}

.filter-options {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-btn {
    padding: 8px 20px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 20px;
    cursor: pointer;
}

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

.case-showcase {
    padding: 60px 0;
}

.case-detail {
    background: white;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    overflow: hidden;
}

.case-header {
    display: flex;
    align-items: center;
    padding: 30px;
    background: var(--light);
    gap: 30px;
}

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

.logo-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.case-content {
    padding: 30px;
}

.solution-steps {
    display: flex;
    gap: 20px;
    margin: 20px 0;
}

.step {
    flex: 1;
    text-align: center;
}

.step-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 10px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* 关于我们页样式 */
.company-profile {
    padding: 80px 0;
    display: flex;
    align-items: center;
}

.profile-content {
    flex: 1;
}

.profile-visual {
    flex: 1;
    min-height: 400px;
    position: relative;
}

.office-mockup {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-end;
}

.building {
    width: 200px;
    height: 300px;
    background: var(--light);
    position: relative;
    margin: 0 auto;
}

.window {
    width: 40px;
    height: 40px;
    background: white;
    position: absolute;
}

.window:nth-child(1) {
    top: 50px;
    left: 30px;
}

.window:nth-child(2) {
    top: 50px;
    right: 30px;
}

.sign {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    text-align: center;
    font-weight: bold;
}

.milestones {
    margin-top: 40px;
}

.milestone {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px dashed #eee;
}

.year {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    min-width: 80px;
}

/* 团队样式 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    text-align: center;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.member-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    background: var(--light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .feature-content.active {
        flex-direction: column;
    }
    
    .feature-visual {
        min-height: 300px;
    }
    
    .company-profile {
        flex-direction: column;
    }
}