/* 基础样式 */
:root {
    --primary: #0A2463;
    --primary-light: #1E3A8A;
    --secondary: #C0C0C0;
    --accent: #FF6B35;
    --light: #FFFFFF;
    --dark: #1A1A1A;
    --gray: #F5F5F7;
    --gray-dark: #6B7280;
    --success: #10B981;
    --font-main: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.section-padding {
    padding: 80px 0;
}

/* 排版 */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    color: var(--primary);
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

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

ul {
    list-style: none;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    font-family: var(--font-main);
}

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

.btn-primary:hover {
    background-color: #e55a2b;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 53, 0.3);
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--light);
    border-color: var(--light);
}

.btn-outline:hover {
    background-color: var(--light);
    color: var(--primary);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* 顶部通知栏 */
.top-bar {
    background-color: var(--primary);
    color: var(--light);
    padding: 8px 0;
    font-size: 0.9rem;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-right {
    display: flex;
    gap: 20px;
}

.top-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--light);
    transition: opacity 0.3s ease;
}

.top-contact:hover {
    opacity: 0.8;
}

.top-contact i {
    font-size: 0.8rem;
}

/* 导航栏 */
.main-header {
    background-color: var(--light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.logo-text h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    color: var(--primary);
}

.logo-text p {
    font-size: 0.8rem;
    margin-bottom: 0;
    color: var(--gray-dark);
    font-family: var(--font-mono);
}

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

.nav-link {
    font-weight: 500;
    color: var(--dark);
    transition: color 0.3s ease;
    position: relative;
    padding: 5px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
}

/* 语言切换 */
.language-floater {
    position: fixed;
    top: 120px;
    right: 20px;
    z-index: 999;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--primary);
    color: var(--light);
    border: none;
    border-radius: 50px;
    padding: 10px 20px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
}

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

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--light);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 150px;
    margin-top: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.language-floater:hover .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown a {
    display: block;
    padding: 12px 20px;
    color: var(--dark);
    transition: background-color 0.3s ease;
}

.lang-dropdown a:hover {
    background-color: var(--gray);
    color: var(--accent);
}

/* 主视觉区 */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1E3A8A 100%);
    color: var(--light);
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 1s ease;
    padding: 0 20px;
}

.slide.active {
    opacity: 1;
}

.slide-content {
    max-width: 800px;
    padding-left: 5%;
}

.slide-content h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--light);
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.slider-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 20px;
}

.slider-prev, .slider-next {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--light);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.slider-prev:hover, .slider-next:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.slider-dots {
    display: flex;
    gap: 10px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.dot.active {
    background-color: var(--light);
}

/* 区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    margin-bottom: 15px;
}

.section-header p {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* 服务卡片 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background-color: var(--light);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid var(--accent);
}

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

.service-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(10, 36, 99, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
    font-size: 1.5rem;
}

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

.service-list {
    margin-top: 20px;
}

.service-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    padding-left: 20px;
}

.service-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* 产品筛选 */
.product-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 20px;
    background-color: var(--gray);
    border: none;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--primary);
    color: var(--light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

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

.product-card:hover {
    transform: translateY(-5px);
}

.product-image {
    height: 200px;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 3rem;
}

.product-info {
    padding: 20px;
}

.product-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--gray);
    border-radius: 50px;
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.product-info h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.spec {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.product-price {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent);
    margin-bottom: 15px;
}

/* 关于我们 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-content h2 {
    color: var(--primary);
}

.about-subtitle {
    font-size: 1.2rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.about-features {
    margin: 25px 0;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.feature i {
    color: var(--success);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
    text-align: center;
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 5px;
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background-color: var(--primary);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--light);
    font-size: 5rem;
}

.image-placeholder p {
    margin-top: 20px;
    color: var(--light);
    font-size: 1.2rem;
}

/* 解决方案标签 */
.tab-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 24px;
    background-color: var(--gray);
    border: none;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover, .tab-btn.active {
    background-color: var(--primary);
    color: var(--light);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

.tab-content ul {
    margin-top: 20px;
}

.tab-content li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    padding-left: 20px;
}

.tab-content li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

/* 合作伙伴 */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.partner-logo {
    height: 100px;
    background-color: var(--gray);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--primary);
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

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

/* 联系表单 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 40px;
}

.contact-details {
    margin: 30px 0;
}

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

.contact-item i {
    color: var(--accent);
    font-size: 1.2rem;
    margin-top: 5px;
}

.contact-item h4 {
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.address-lines {
    white-space: pre-line;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: var(--light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-link:hover {
    background-color: var(--accent);
    transform: translateY(-3px);
}

.contact-form {
    background-color: var(--gray);
    padding: 30px;
    border-radius: 8px;
}

.contact-form h3 {
    margin-bottom: 20px;
    color: var(--primary);
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: var(--font-main);
    font-size: 1rem;
    background-color: var(--light);
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
}

.form-group label {
    position: absolute;
    top: 12px;
    left: 15px;
    color: var(--gray-dark);
    transition: all 0.3s ease;
    pointer-events: none;
    background-color: var(--light);
    padding: 0 5px;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group select:focus + label,
.form-group select:not([value=""]) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    font-size: 0.8rem;
    color: var(--primary);
}

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

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--light);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo h3 {
    font-size: 1.3rem;
    margin-bottom: 0;
    color: var(--light);
}

.footer-logo p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
}

.footer-about {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

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

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: var(--accent);
}

.newsletter-form {
    display: flex;
    margin-top: 15px;
}

.newsletter-form input {
    flex: 1;
    padding: 10px 15px;
    border: none;
    border-radius: 4px 0 0 4px;
    font-family: var(--font-main);
}

.newsletter-form button {
    padding: 10px 20px;
    background-color: var(--accent);
    color: var(--light);
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.newsletter-form button:hover {
    background-color: #e55a2b;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    margin-left: 20px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent);
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--light);
    width: 90%;
    max-width: 600px;
    border-radius: 8px;
    overflow: hidden;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 20px 30px;
    background-color: var(--primary);
    color: var(--light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close {
    background: none;
    border: none;
    color: var(--light);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.modal-body {
    padding: 30px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-grid,
    .tab-content-inner,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .slide-content h2 {
        font-size: 2.5rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--light);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease;
        z-index: 1000;
    }
    
    .nav-menu.active {
        transform: translateY(-100%);
    }
    
    .nav-actions {
        display: none;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .top-bar-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
    
    .language-floater {
        top: 160px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .footer-links a {
        margin: 0 10px;
    }
    
    .slide-content h2 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .product-filters,
    .tab-buttons {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 10px;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form input,
    .newsletter-form button {
        width: 100%;
        border-radius: 4px;
        margin-bottom: 10px;
    }
}