:root {
    --primary-color: #00D1FF;
    --text-color: #FFFFFF;
    --bg-color: #000000;
    --secondary-bg: #111111;
    --accent-color: #00D1FF;
    --gradient-start: #F5F9FF;
    --gradient-end: #E8F1FF;
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

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

.logo-image {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.language-switch {
    display: flex;
    gap: 2px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 2px;
    margin-left: 2rem;
}

.lang-btn {
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.3s;
    font-size: 14px;
}

.lang-btn.active {
    background: var(--primary-color);
    color: var(--bg-color);
}

.lang-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
}

/* Hero部分样式更新 */
.hero {
    position: relative;
    padding: 10rem 0 6rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.background-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.background-video video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.background-video .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2;
}

.hero .container {
    position: relative;
    z-index: 3;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: white;
    font-weight: 600;
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    position: relative;
    z-index: 10;
}

.primary-btn {
    background: #00D1FF;
    color: #001B44;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.secondary-btn {
    background: transparent;
    border: 2px solid #00D1FF;
    color: #00D1FF;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.primary-btn:hover {
    background: #00b8e6;
    transform: translateY(-2px);
}

.secondary-btn:hover {
    background: rgba(0, 209, 255, 0.1);
    transform: translateY(-2px);
}

/* 章节标题样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 2.5rem; /* 放大标题 */
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #00D1FF, #00FF9E);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-header p {
    font-size: 1.25rem; /* 放大副标题 */
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* 特性部分样式 */
.features {
    padding: 6rem 0;
    background: var(--bg-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem; /* 增加间距 */
    margin-top: 4rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.feature-card {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(0, 209, 255, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    color: #00FF9E;
}

.feature-card:hover h3 {
    color: var(--primary-color);
}

.feature-card p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    transition: all 0.3s ease;
}

/* 产品部分样式 */
.products {
    background: var(--bg-color);
    padding: 6rem 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem; /* 增加间距 */
    margin-top: 4rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.product-card {
    background: var(--secondary-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(0, 209, 255, 0.15);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.1);
    color: #00FF9E;
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.product-card:hover h3 {
    color: var(--primary-color);
}

.product-card p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    transition: all 0.3s ease;
}

/* 了解更多链接动效 */
.learn-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    margin-top: 1.5rem;
    opacity: 0.9;
    transition: all 0.3s ease;
}

.learn-more:after {
    content: '→';
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.product-card:hover .learn-more {
    opacity: 1;
}

.product-card:hover .learn-more:after {
    transform: translateX(5px);
}

/* 添加背景光效 */
.feature-card::before,
.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.05),
        transparent
    );
    transition: 0.5s;
}

.feature-card:hover::before,
.product-card:hover::before {
    left: 100%;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero {
        padding: 8rem 0 4rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons button {
        width: 100%;
    }

    .nav-links {
        display: none;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }

    .logo-image {
        height: 32px;
    }
}

/* 页脚样式 */
.footer {
    background: var(--secondary-bg);
    color: #fff;
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.brand-col .logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #fff;
}

.company-desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s;
}

.social-links a:hover {
    color: #00D1FF;
}

.footer-col h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #fff;
}

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

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col ul a:hover {
    color: #00D1FF;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1rem;
}

.contact-info svg {
    flex-shrink: 0;
}

.footer-bottom {
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.legal-links {
    display: flex;
    gap: 2rem;
}

.legal-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.legal-links a:hover {
    color: #00D1FF;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .brand-col {
        grid-column: 1 / -1;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .legal-links {
        justify-content: center;
    }
}

/* 页脚 logo 样式 */
.footer .logo-image {
    height: 32px;
    opacity: 0.9;
}

/* 确保section有足够的上边距，避免被固定导航栏遮挡 */
section {
    padding-top: 80px; /* 根据实际导航栏高度调整 */
    margin-top: -80px; /* 抵消padding-top */
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1.1rem;
    }
    
    .features-grid,
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 576px) {
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .features-grid,
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card,
    .product-card {
        padding: 2rem;
    }
}

/* 模态框样式 */
.demo-modal {
    display: none;
    position: fixed;
    bottom: -100%;
    right: 2rem;
    width: 400px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: bottom 0.5s ease;
}

.demo-modal.active {
    bottom: 2rem;
    display: block;
}

.modal-content {
    padding: 2rem;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.modal-header h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--primary-color);
}

/* 表单样式 */
.demo-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-color);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--secondary-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 209, 255, 0.1);
}

.submit-btn {
    background: var(--primary-color);
    color: var(--bg-color);
    border: none;
    padding: 1rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background: #00FF9E;
    transform: translateY(-2px);
}

/* 响应式调整 */
@media (max-width: 576px) {
    .demo-modal {
        width: calc(100% - 2rem);
        right: 1rem;
    }
    
    .demo-modal.active {
        bottom: 1rem;
    }
}

/* 主按钮样式 */
.primary-btn.demo-btn {
    cursor: pointer;
}