/* 全局样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #00a0e9;
    --accent-color: #38bdf8;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

section {
    padding: 100px 0;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(0, 102, 204, 0.4);
    color: white;
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

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

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

.logo a {
    display: flex;
    align-items: center;
    color: var(--dark-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo span {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav ul {
    display: flex;
}

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.nav ul li a:hover::after,
.nav ul li a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--dark-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* 主横幅 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.9), rgba(0, 102, 204, 0.8)), url('../images/hero-bg.jpg') no-repeat center center/cover;
    color: white;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/pattern.png') repeat;
    opacity: 0.1;
    animation: backgroundMove 20s linear infinite;
}

@keyframes backgroundMove {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 100px 100px;
    }
}

.hero-content {
    flex: 1;
    padding: 0 20px;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 600px;
    opacity: 0.9;
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.hero-image img {
    max-width: 90%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0);
    }
}

.hero-stats {
    position: absolute;
    bottom: 100px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 60px;
    z-index: 1;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--accent-color);
}

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

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-down a {
    display: block;
    color: white;
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

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

/* 产品特点 */
.features {
    background-color: var(--light-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 1.8rem;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-light);
}

/* 产品系列 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

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

.product-image {
    position: relative;
    height: 250px;
    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-tags {
    position: absolute;
    top: 15px;
    left: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.product-tags span {
    background-color: rgba(0, 102, 204, 0.8);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.product-info p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.product-specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

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

.spec-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.spec-value {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.product-features span {
    background-color: #f0f7ff;
    color: var(--primary-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* 行业解决方案 */
.solutions {
    background-color: var(--light-color);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.solution-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.solution-image {
    height: 200px;
    overflow: hidden;
}

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

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

.solution-content {
    padding: 25px;
}

.solution-content h3 {
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.solution-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.solution-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.solution-features span {
    background-color: #f0f7ff;
    color: var(--primary-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.solution-data {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 15px 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

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

.data-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.data-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
}

/* 成功案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.case-image {
    height: 200px;
    overflow: hidden;
}

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

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

.case-content {
    padding: 25px;
}

.case-content h3 {
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.case-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.case-data {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 15px 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.case-results {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.case-results h4 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.case-results ul {
    padding-left: 20px;
}

.case-results ul li {
    position: relative;
    margin-bottom: 5px;
    padding-left: 20px;
}

.case-results ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

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

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

.about-text h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-light);
}

.company-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.team-section {
    margin-top: 80px;
}

.team-section h3 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 1.8rem;
    color: var(--primary-color);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.team-member {
    text-align: center;
}

.member-image {
    width: 150px;
    height: 150px;
    margin: 0 auto 15px;
    border-radius: 50%;
    overflow: hidden;
    border: 5px solid #f0f7ff;
}

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

.team-member h4 {
    margin-bottom: 5px;
    font-size: 1.2rem;
}

.team-member p {
    color: var(--text-light);
}

/* 联系我们 */
.contact {
    background-color: var(--light-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

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

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    background-color: #f0f7ff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.info-item p {
    color: var(--text-light);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: #f0f7ff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

.contact-form {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

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

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

.footer-logo img {
    height: 50px;
    margin-bottom: 15px;
}

.footer-logo p {
    opacity: 0.8;
}

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

.link-group h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
    position: relative;
    padding-bottom: 10px;
}

.link-group h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.link-group ul li {
    margin-bottom: 10px;
}

.link-group ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.link-group ul li a:hover {
    color: white;
    padding-left: 5px;
}

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

.footer-bottom p {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: 2;
    }
    
    .about-text {
        order: 1;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background-color: white;
        padding: 80px 20px;
        transition: var(--transition);
        z-index: 1001;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav ul {
        flex-direction: column;
    }
    
    .nav ul li {
        margin: 15px 0;
    }
    
    .mobile-menu-btn {
        display: flex;
        z-index: 1002;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 100px;
    }
    
    .hero-content {
        margin-bottom: 50px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        position: relative;
        bottom: 0;
        margin-top: 50px;
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .solution-data,
    .case-data {
        flex-direction: column;
        gap: 15px;
    }
    
    .data-item {
        width: 100%;
    }
}

/* Popup Message Styles */
.popup-message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 4px;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.popup-message.show {
    transform: translateX(0);
    opacity: 1;
}

.popup-message .popup-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.popup-message.success {
    border-left: 4px solid #4CAF50;
}

.popup-message.error {
    border-left: 4px solid #f44336;
}

.popup-message i {
    font-size: 20px;
}

.popup-message.success i {
    color: #4CAF50;
}

.popup-message.error i {
    color: #f44336;
}

.popup-message p {
    margin: 0;
    color: #333;
    font-size: 14px;
}