/* ========================================
   NexaTech 科技公司官网 - 全局样式
   ======================================== */

/* CSS变量定义 */
:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4aa;
    --dark-bg: #0a0a1a;
    --dark-secondary: #141428;
    --text-primary: #ffffff;
    --text-secondary: #b8b8d0;
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00d4aa 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a1a 0%, #141428 100%);
    --box-shadow: 0 10px 40px rgba(0, 102, 255, 0.2);
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.4);
}

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

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

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

/* 页面区块 */
.section {
    padding: 100px 0;
}

/* 区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 40px;
    margin-bottom: 15px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ========================================
   导航栏样式
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
}

.logo i {
    font-size: 28px;
    color: var(--primary-color);
}

.logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar .nav-list {
    display: flex;
    gap: 40px;
}

.navbar .nav-list a {
    font-size: 16px;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.navbar .nav-list a:hover,
.navbar .nav-list a.active {
    color: var(--primary-color);
}

.navbar .nav-list a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.navbar .nav-list a:hover::after,
.navbar .nav-list a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?w=1920') center/cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10, 10, 26, 0.9) 0%, rgba(20, 20, 40, 0.8) 100%);
}

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

.hero-content h1 {
    font-size: 60px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.hero-scroll i {
    font-size: 30px;
    color: var(--primary-color);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   服务区块
   ======================================== */
.services {
    background: var(--dark-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.service-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 32px;
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-link {
    color: var(--primary-color);
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.service-link:hover {
    gap: 10px;
}

/* ========================================
   关于我们预览
   ======================================== */
.about-preview {
    background: var(--dark-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image img {
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

.about-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.about-content > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 16px;
}

.about-list i {
    color: var(--secondary-color);
    font-size: 18px;
}

/* ========================================
   数据统计
   ======================================== */
.stats {
    background: var(--gradient-primary);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

/* ========================================
   产品展示
   ======================================== */
.products {
    background: var(--dark-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
}

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

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

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.product-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.product-tag {
    display: inline-block;
    padding: 5px 12px;
    background: var(--primary-color);
    border-radius: 20px;
    font-size: 12px;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners {
    background: var(--dark-bg);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
}

.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    transition: var(--transition);
}

.partner-logo:hover {
    background: rgba(0, 102, 255, 0.1);
}

.partner-logo i {
    font-size: 40px;
    color: var(--text-secondary);
}

.partner-logo span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   CTA 区域
   ======================================== */
.cta {
    background: var(--gradient-primary);
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta-content p {
    margin-bottom: 30px;
    opacity: 0.9;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--dark-secondary);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
}

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

.footer-col > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

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

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

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

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 25px;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--text-secondary);
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 4px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

/* ========================================
   关于我们页面样式
   ======================================== */

/* 公司简介 */
.company-intro {
    background: var(--dark-bg);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-image img {
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

.intro-content p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.intro-stat {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.intro-stat .number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    margin-bottom: 5px;
}

.intro-stat .label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 发展历程 */
.timeline-section {
    background: var(--dark-secondary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    z-index: 1;
}

.timeline-year {
    flex: 0 0 150px;
    text-align: right;
    padding-right: 30px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.timeline-content {
    flex: 1;
    padding-left: 30px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-content h3 {
    margin-bottom: 10px;
    font-size: 20px;
}

.timeline-content p {
    color: var(--text-secondary);
}

/* 核心价值观 */
.values-section {
    background: var(--dark-bg);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.value-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 32px;
}

.value-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.value-card p {
    color: var(--text-secondary);
}

/* 团队展示 */
.team-section {
    background: var(--dark-secondary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-member {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.member-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.member-info {
    padding: 25px;
    text-align: center;
}

.member-info h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.member-info .position {
    color: var(--primary-color);
    font-size: 14px;
    margin-bottom: 10px;
}

.member-info .bio {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.member-social {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.member-social a {
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
}

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

/* 技术实力 */
.tech-strength {
    background: var(--dark-bg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.tech-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.tech-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 32px;
}

.tech-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.tech-card p {
    color: var(--text-secondary);
}

/* CTA 按钮组 */
.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* 页面标题 */
.page-header {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://images.unsplash.com/photo-1517694712202-14dd9538aa97?w=1920') center/cover;
}

.page-header-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10, 10, 26, 0.9) 0%, rgba(20, 20, 40, 0.8) 100%);
}

.page-header-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.page-header-content h1 {
    font-size: 48px;
    margin-bottom: 15px;
}

.page-header-content p {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .services-grid,
    .values-grid,
    .team-grid,
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .intro-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 60px;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    .timeline-year {
        flex: none;
        text-align: left;
        padding-right: 0;
        margin-bottom: 10px;
    }
    
    .timeline-content {
        padding-left: 0;
    }
}

@media (max-width: 768px) {
    .navbar .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        flex-direction: column;
        padding: 20px;
        gap: 20px;
    }
    
    .navbar .nav-list.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 30px;
    }
    
    .services-grid,
    .products-grid,
    .values-grid,
    .team-grid,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .intro-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .page-header {
        height: 300px;
    }
    
    .page-header-content h1 {
        font-size: 36px;
    }
    
    .page-header-content p {
        font-size: 16px;
    }
}