/* ========================================
   武汉高思光电科技有限公司 - 样式表
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #0066cc;
    --primary-dark: #004d99;
    --secondary-color: #00a8e8;
    --accent-color: #ff6b35;
    --text-color: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-light: #f8f9fa;
    --bg-dark: #1a1a2e;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

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

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

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

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

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

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

.btn-lg {
    padding: 16px 40px;
    font-size: 17px;
}

/* ========================================
   Header
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 50px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

/* Primary Navigation */
.primary-nav ul {
    display: flex;
    gap: 40px;
}

.primary-nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-color);
    padding: 10px 0;
    position: relative;
}

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

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

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

/* Submenu */
.has-submenu {
    position: relative;
}

.has-submenu > a i {
    margin-left: 5px;
    font-size: 12px;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 4px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
}

.submenu li a:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.submenu li a::after {
    display: none;
}

/* Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 15px 0;
}

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

.hamburger {
    width: 30px;
    height: 24px;
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    position: absolute;
    left: 0;
    transition: var(--transition);
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }

.hamburger.active span:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 999;
    padding: 20px;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
}

.mobile-nav.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mobile-nav a {
    display: block;
    padding: 10px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--border-color);
}


/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 600px;
    background: linear-gradient(135deg, #0066cc 0%, #00a8e8 100%);
    display: flex;
    align-items: center;
    margin-top: 80px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-bg.jpg') center/cover no-repeat;
    opacity: 0.2;
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--white);
    max-width: 700px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

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

/* ========================================
   Intro Section
   ======================================== */
.intro {
    padding: 80px 0;
    background-color: var(--white);
}

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

.intro-text h2 {
    font-size: 32px;
    color: var(--text-color);
    margin-bottom: 20px;
}

.intro-text p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.intro-text .btn {
    margin-top: 15px;
}

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

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

/* ========================================
   Section Header
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--text-color);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-light);
}

/* ========================================
   Products Section
   ======================================== */
.products-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.product-card {
    display: block;
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 102, 204, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-overlay span {
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 20px;
    border: 2px solid var(--white);
    border-radius: 4px;
}

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

.product-title h3 {
    font-size: 18px;
    color: var(--text-color);
}

.product-title i {
    color: var(--primary-color);
}

/* ========================================
   Featured Products
   ======================================== */
.featured-products {
    padding: 80px 0;
    background-color: var(--white);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.featured-card {
    display: flex;
    background-color: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
}

.featured-image {
    flex: 0 0 40%;
    min-height: 280px;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-info {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.featured-info h3 {
    font-size: 20px;
    color: var(--text-color);
    margin-bottom: 15px;
}

.featured-desc {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 15px;
}

.featured-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.featured-tags span {
    font-size: 12px;
    padding: 4px 12px;
    background-color: var(--white);
    color: var(--primary-color);
    border-radius: 20px;
}

.featured-info .btn {
    margin-top: auto;
    align-self: flex-start;
}

/* ========================================
   Applications Section
   ======================================== */
.applications {
    padding: 80px 0;
    background-color: var(--bg-dark);
    color: var(--white);
}

.applications .section-header h2,
.applications .section-header p {
    color: var(--white);
}

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

.app-item {
    text-align: center;
    padding: 30px 15px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: var(--transition);
}

.app-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.app-item i {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.app-item h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.app-item p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.cta-content {
    text-align: center;
    color: var(--white);
}

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

.cta-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}


/* ========================================
   Footer
   ======================================== */
.site-footer {
    background-color: #1a1a2e;
    color: var(--white);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo .logo-text {
    font-size: 28px;
    color: var(--white);
}

.footer-desc {
    margin-top: 15px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.7;
}

.footer-contact-info {
    margin-top: 20px;
}

.footer-contact-info p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 10px;
}

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

.footer-links h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

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

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

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-nav a {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-nav a:hover {
    color: var(--white);
}

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 100px 0 60px;
    margin-top: 80px;
    text-align: center;
    color: var(--white);
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

/* ========================================
   Products Page
   ======================================== */
.products-page {
    padding: 60px 0;
}

.product-category {
    margin-bottom: 60px;
}

.product-category h2 {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

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

.product-item {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-item-image {
    height: 180px;
    overflow: hidden;
}

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

.product-item-info {
    padding: 20px;
}

.product-item-info h3 {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 10px;
}

.product-item-info p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========================================
   About Page
   ======================================== */
.about-section {
    padding: 60px 0;
}

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

.about-text h2 {
    font-size: 32px;
    color: var(--text-color);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 15px;
}

.about-image img {
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

.business-scope {
    padding: 60px 0;
    background-color: var(--bg-light);
}

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

.scope-item {
    background-color: var(--white);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow);
}

.scope-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.scope-item h4 {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 10px;
}

.scope-item p {
    font-size: 13px;
    color: var(--text-light);
}

/* ========================================
   Contact Page
   ======================================== */
.contact-section {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item-content h4 {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 5px;
}

.contact-item-content p {
    font-size: 14px;
    color: var(--text-light);
}

.contact-form h2 {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--text-color);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

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

.form-group textarea {
    height: 150px;
    resize: vertical;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .products-grid,
    .product-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .app-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scope-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .site-header {
        display: none;
    }
    
    .mobile-header,
    .mobile-nav {
        display: block;
    }
    
    .hero {
        height: 500px;
        margin-top: 60px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .intro-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .products-grid,
    .product-list,
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-card {
        flex-direction: column;
    }
    
    .featured-image {
        min-height: 200px;
    }
    
    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
    }
    
    .page-header {
        margin-top: 60px;
        padding: 80px 0 40px;
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .scope-list {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .intro-stats {
        grid-template-columns: 1fr;
    }
    
    .app-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 32px;
    }
}