/* 基础样式 */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #94a3b8;
    --dark-gray: #334155;
    --light-gray: #e2e8f0;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--dark-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

section {
    padding: 80px 0;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
}

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

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

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

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

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

.section-subtitle {
    text-align: center;
    color: var(--gray-color);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

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

/* 导航栏 */
.navbar {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--dark-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

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

.nav-menu li {
    margin-left: 30px;
    position: relative;
}

.nav-menu a {
    color: var(--dark-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    padding: 10px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li {
    margin: 0;
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 8px 20px;
    color: var(--dark-color);
}

.dropdown-menu a:hover {
    background-color: var(--light-gray);
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--dark-color);
    transition: all 0.3s ease;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 150px 0 80px;
    margin-top: 70px;
}

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

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero h1 {
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero p {
    font-size: 1.1rem;
    color: var(--dark-gray);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

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

.hero-image img {
    max-width: 100%;
    height: auto;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

/* 产品与服务 */
.products-section {
    background-color: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

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

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.product-icon {
    width: 60px;
    height: 60px;
    background-color: #e0f2fe;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary-color);
    font-size: 1.5rem;
}

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

.product-card p {
    color: var(--gray-color);
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.read-more i {
    font-size: 0.8rem;
    transition: transform 0.3s;
}

.read-more:hover i {
    transform: translateX(3px);
}

/* 技术优势 */
.technology-section {
    background-color: #f8fafc;
}

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

.technology-content {
    flex: 1;
}

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

.technology-image img {
    max-width: 100%;
    height: auto;
}

.technology-list {
    margin-top: 30px;
}

.tech-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.tech-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.tech-item h3 {
    margin-bottom: 5px;
    color: var(--dark-color);
}

.tech-item p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* 客户案例 */
.cases-section {
    background-color: white;
}

.cases-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.case-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.case-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.case-info {
    padding: 25px;
}

.case-info h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.case-info p {
    color: var(--gray-color);
    margin-bottom: 20px;
}

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

.case-stats div {
    text-align: center;
}

.case-stats span {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.case-stats small {
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* CTA区域 */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
    padding: 60px 0;
}

.cta-section h2 {
    margin-bottom: 20px;
}

.cta-section p {
    max-width: 700px;
    margin: 0 auto 30px;
    color: rgba(255, 255, 255, 0.9);
}

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

/* 页脚 */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    margin-bottom: 20px;
    height: 40px;
}

.footer-slogan {
    color: var(--gray-color);
    margin-bottom: 20px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: background-color 0.3s;
}

.social-links a:hover {
    background-color: var(--primary-color);
}

.footer-col h3 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

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

.footer-col a {
    color: var(--gray-color);
    transition: color 0.3s;
}

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

.contact-info li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--gray-color);
}

.contact-info i {
    width: 20px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--gray-color);
    transition: color 0.3s;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
        margin-bottom: 50px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .technology-section .container {
        flex-direction: column;
    }
    
    .technology-content {
        order: 2;
    }
    
    .technology-image {
        order: 1;
        margin-bottom: 50px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transition: left 0.3s;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        display: none;
    }
    
    .dropdown-menu.active {
        display: block;
    }
    
    .dropdown a {
        display: flex;
        align-items: center;
        gap: 5px;
    }
    
    .dropdown i {
        transition: transform 0.3s;
    }
    
    .dropdown.active i {
        transform: rotate(180deg);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.7rem;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .case-stats {
        flex-direction: column;
        gap: 15px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}