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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

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

.btn-secondary:hover {
    background: white;
    color: #333;
}

.btn-download {
    background: #4CAF50;
    color: white;
    margin: 0 10px 10px 0;
}

.btn-download:hover {
    background: #45a049;
    transform: translateY(-2px);
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo h2 {
    color: #667eea;
    margin-bottom: 5px;
}

.logo span {
    font-size: 12px;
    color: #666;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #667eea;
}

/* 主页横幅 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.hero-buttons {
    margin-top: 2rem;
    gap: 1rem;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: #f8f9fa;
}

.about h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #666;
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.feature-item h4 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

/* 解决方案 */
.solutions {
    padding: 100px 0;
    background: white;
}

.solutions h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.solution-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-align: center;
}

.solution-card h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    text-align: center;
}

.solution-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.solution-card ul {
    list-style: none;
    padding-left: 0;
}

.solution-card li {
    color: #555;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.solution-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4CAF50;
    font-weight: bold;
}

/* 技术优势 */
.advantages {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.advantages h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.advantages-content {
    max-width: 900px;
    margin: 0 auto;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 3rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.advantage-number {
    font-size: 2rem;
    font-weight: bold;
    color: #667eea;
    margin-right: 2rem;
    min-width: 60px;
    text-align: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.advantage-text h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.advantage-text p {
    color: #666;
    line-height: 1.7;
}

/* APP介绍 */
.app-section {
    padding: 100px 0;
    background: white;
}

.app-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.app-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.app-left {
    order: 1;
}

.app-right {
    order: 2;
}

.app-info h3 {
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 1rem;
    text-align: left;
}

.app-description {
    font-size: 1.1rem;
    color: #666;
    text-align: left;
    margin-bottom: 3rem;
    line-height: 1.8;
}

/* APP截图展示 */
.app-screenshots {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.app-screenshots h4 {
    color: #333;
    margin-bottom: 2rem;
    text-align: center;
    font-size: 1.3rem;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.screenshot-item {
    text-align: center;
    background: white;
    border-radius: 15px;
    padding: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.screenshot-item img {
    width: 100%;
    height: auto;
    max-width: 200px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.screenshot-item p {
    margin-top: 1rem;
    color: #555;
    font-size: 0.9rem;
    font-weight: 500;
}

.app-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-group {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    border-left: 4px solid #667eea;
}

.feature-group h4 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.feature-group ul {
    list-style: none;
    padding-left: 0;
}

.feature-group li {
    color: #555;
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
}

.feature-group li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 1.2rem;
}

.app-download {
    text-align: center;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    margin-top: 2rem;
}

.app-download h4 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.app-download p {
    color: #666;
    margin-bottom: 1.5rem;
    font-family: 'Courier New', monospace;
    background: #e9ecef;
    padding: 10px;
    border-radius: 5px;
    display: inline-block;
}

.download-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: #f8f9fa;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-info h3 {
    color: #667eea;
    margin-bottom: 2rem;
    text-align: center;
}

.contact-item {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.contact-item strong {
    color: #333;
    display: inline-block;
    width: 110px;
}

.contact-item a {
    color: #667eea;
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.phone-link {
    color: #667eea !important;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.phone-link:hover {
    color: #764ba2 !important;
    text-decoration: none !important;
    transform: scale(1.05);
}

.address-text {
    color: #555;
    font-weight: 500;
    line-height: 1.4;
}

.business-cooperation {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.business-cooperation h4 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.business-cooperation p {
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: #667eea;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
    padding-left: 0;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 200px;
        margin: 0.5rem 0;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .app-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .app-left {
        order: 2;
    }
    
    .app-right {
        order: 1;
    }
    
    .app-info h3 {
        text-align: center;
    }
    
    .app-description {
        text-align: center;
    }
    
    .app-features {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .advantage-item {
        flex-direction: column;
        text-align: center;
    }
    
    .advantage-number {
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 0 15px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .feature-item,
    .solution-card,
    .contact-info,
    .business-cooperation {
        padding: 1.5rem;
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .screenshot-item img {
        max-width: 250px;
    }
    
    .app-screenshots {
        padding: 1.5rem;
    }
}