/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量定义 */
:root {
    --primary-color: #1a237e;
    --secondary-color: #3f51b5;
    --accent-color: #ff6f00;
    --text-color: #333;
    --text-light: #666;
    --text-white: #fff;
    --bg-dark: #0d1421;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #1a237e 0%, #3f51b5 100%);
    --gradient-accent: linear-gradient(135deg, #ff6f00 0%, #ff8f00 100%);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo .logo-img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 16px;
    padding: 10px 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* 英雄区域样式 */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-dark);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../2.jpg') center/cover no-repeat;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 35, 126, 0.9) 0%, rgba(63, 81, 181, 0.8) 100%);
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    color: var(--text-white);
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.title-main {
    display: block;
    background: linear-gradient(135deg, #fff 0%, #ff6f00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-sub {
    display: block;
    font-size: 0.7em;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--text-white);
    box-shadow: 0 10px 30px rgba(255, 111, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255, 111, 0, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-left: 60px;
}

.stat-item {
    text-align: center;
    color: var(--text-white);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-top: 5px;
}

/* 通用区域样式 */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们区域 */
.about {
    padding: 120px 0;
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-intro h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-intro p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 40px;
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 8px;
}

.feature-content p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.about-image {
    position: relative;
}

.about-img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

/* 产品展示区域 */
.products {
    padding: 120px 0;
}

.products-showcase {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

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

.product-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.main-product-img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: var(--transition);
}

.product-image:hover .main-product-img {
    transform: scale(1.05);
}

.product-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.product-description p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 30px;
}

.product-specs h4 {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 20px;
}

.specs-list {
    list-style: none;
}

.specs-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 1rem;
    color: var(--text-light);
}

.specs-list i {
    color: var(--accent-color);
    font-size: 0.9rem;
}

.product-gallery {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 40px;
}

.gallery-item {
    width: 120px;
    height: 80px;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition);
    border: 3px solid transparent;
}

.gallery-item.active,
.gallery-item:hover {
    opacity: 1;
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

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

/* 技术实力区域 */
.technology {
    padding: 120px 0;
    background: var(--bg-dark);
    color: var(--text-white);
}

.technology .section-title {
    color: var(--text-white);
}

.tech-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 80px;
}

.tech-stat-item {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.tech-stat-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
}

.stat-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-desc {
    font-size: 1rem;
    opacity: 0.8;
}

/* 服务流程区域 */
.process {
    padding: 120px 0;
    background: var(--bg-light);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.step-item {
    position: relative;
    text-align: center;
    padding: 40px 20px;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.step-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: 700;
    font-size: 1.1rem;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px auto 20px;
    color: var(--text-white);
    font-size: 2rem;
}

.step-content h3 {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 15px;
}

.step-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 联系我们区域 */
.contact {
    padding: 120px 0;
}

.contact-content {
    display: flex;
    justify-content: center;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 800px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 10px;
}

.contact-details p {
    color: var(--text-light);
    line-height: 1.6;
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.8rem;
    color: var(--text-color);
    margin-bottom: 30px;
    text-align: center;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
}

.btn-full {
    width: 100%;
    justify-content: center;
    padding: 18px 30px;
    font-size: 1.1rem;
}

/* 页脚样式 */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo-img {
    height: 50px;
    width: auto;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.footer-logo p {
    opacity: 0.8;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

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

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-section ul li i {
    margin-right: 10px;
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-copyright p {
    opacity: 0.7;
}

.footer-copyright a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-copyright a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-accent);
    border: none;
    border-radius: 50%;
    color: var(--text-white);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 111, 0, 0.3);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-stats {
        flex-direction: row;
        margin-left: 0;
        margin-top: 40px;
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .product-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .tech-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 10px 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-stats {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .product-title {
        font-size: 2rem;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
}