/* 全局样式 */
:root {
    --primary-color: #2a52be;
    --secondary-color: #34495e;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-text: #fff;
    --light-bg: #f8f9fa;
    --dark-bg: #2c3e50;
    --border-color: #ddd;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --border-radius: 4px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: #fff;
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    color: var(--secondary-color);
    font-weight: 700;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 15px auto 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    font-size: 1rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background-color: #1e3d8f;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.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(--light-text);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

/* 头部样式 */
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);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 15px 20px;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

nav ul {
    display: flex;
}

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

nav ul li a {
    color: var(--secondary-color);
    font-weight: 600;
    position: relative;
    padding: 5px 0;
    font-size: 1.05rem;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-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;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: 3px 0;
    border-radius: 3px;
    transition: var(--transition);
}

/* 英雄区域样式 */
.hero {
    padding: 150px 0 100px;
    background-color: var(--light-bg);
    position: relative;
}

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

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-content h2 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #666;
}

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

.hero-image {
    flex: 1;
    text-align: right;
}

.hero-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.5s ease;
}

/* 特点区域样式 */
.features {
    padding: 100px 0;
    background-color: #fff;
}

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

.feature-card {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature-card p {
    color: #666;
}

/* 产品区域样式 */
.products {
    padding: 100px 0;
    background-color: var(--light-bg);
}

.product-tabs {
    max-width: 1000px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    background: none;
    border: none;
    padding: 10px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    margin: 0 10px;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: transparent;
    transition: var(--transition);
    border-radius: 2px;
}

.tab-btn:hover,
.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    background-color: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-info {
    display: flex;
    align-items: center;
    gap: 40px;
}

.product-image {
    flex: 1;
}

.product-image img {
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.product-details {
    flex: 1;
}

.product-details h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.product-details p {
    margin-bottom: 20px;
}

.product-details ul {
    margin-bottom: 30px;
}

.product-details ul li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
}

.product-details ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* 关于我们区域样式 */
.about {
    padding: 100px 0;
    background-color: #fff;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-image {
    flex: 1;
}

.about-image img {
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 15px;
    line-height: 1.6;
}

/* 技术原理部分样式 */
.tech-principle {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.principle-content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 40px;
}

.principle-image {
    flex: 1;
    min-width: 300px;
}

.principle-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.principle-image img:hover {
    transform: scale(1.02);
}

.principle-text {
    flex: 1;
    min-width: 300px;
}

.principle-text h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.principle-text p {
    margin-bottom: 20px;
    line-height: 1.6;
}

.principle-list {
    list-style: none;
    padding: 0;
}

.principle-list li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

.principle-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 案例展示部分样式 */
.case-studies {
    padding: 80px 0;
}

.case-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 40px;
}

.case-card {
    flex: 1;
    min-width: 300px;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.case-image {
    width: 100%;
}

.case-image img {
    width: 100%;
    height: auto;
    display: block;
}

.case-details {
    padding: 20px;
}

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

.case-details p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.case-results {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

.case-results li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    line-height: 1.4;
}

.case-results li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* FAQ部分样式 */
.faq {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.faq-content {
    margin-top: 40px;
}

.faq-item {
    background-color: #fff;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    margin: 0;
    font-size: 1.2rem;
    color: var(--primary-color);
    background-color: rgba(0, 0, 0, 0.02);
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s ease;
}

.faq-question::after {
    content: "+";
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 1000px;
}

.faq-answer p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.faq-answer ul {
    padding-left: 20px;
    margin-bottom: 15px;
}

.faq-answer ul li {
    margin-bottom: 8px;
    line-height: 1.5;
}

/* 联系我们区域样式 */
.contact {
    padding: 100px 0;
    background-color: var(--light-bg);
}

.contact-content {
    display: flex;
    gap: 50px;
}

.contact-form {
    flex: 2;
    background-color: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary-color);
}

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

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(42, 82, 190, 0.2);
}

.contact-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.info-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.info-item h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.info-item p {
    color: #666;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-bg);
    color: var(--light-text);
    padding: 80px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 50px;
}

.footer-logo h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.footer-logo p {
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 50px;
}

.link-group h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.link-group h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

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

.link-group ul li a {
    color: #ccc;
}

.link-group ul li a:hover {
    color: var(--light-text);
}

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

.social-link {
    color: #ccc;
    font-size: 1rem;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--light-text);
}

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

.footer-bottom p {
    text-align: center;
    font-size: 0.9rem;
    color: #aaa;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container,
    .about-content,
    .product-info {
        flex-direction: column;
        gap: 40px;
    }
    
    .hero-content,
    .about-text,
    .product-details {
        max-width: 100%;
    }
    
    .hero-image,
    .about-image,
    .product-image {
        text-align: center;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: #fff;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 10px 0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .tab-buttons {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        margin-bottom: 10px;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* 添加动画效果 */
.animated {
    animation-duration: 0.6s;
    animation-fill-mode: both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 添加图片悬停效果 */
.hero-image img:hover,
.product-image img:hover,
.about-image img:hover {
    transform: scale(1.03);
}

/* 添加按钮点击效果 */
.btn:active {
    transform: scale(0.98);
}

/* 添加移动菜单按钮动画 */
.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 添加表单焦点效果 */
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(42, 82, 190, 0.2);
}

/* 添加无障碍焦点样式 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 添加打印样式 */
@media print {
    header, 
    footer,
    .hero-buttons,
    .contact-form button {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
    
    .container {
        width: 100%;
        max-width: 100%;
        padding: 0;
    }
    
    .hero,
    .features,
    .products,
    .about,
    .contact {
        padding: 20pt 0;
        background: none;
    }
    
    .hero-content h2 {
        font-size: 24pt;
    }
    
    .section-title {
        font-size: 20pt;
    }
    
    .feature-card,
    .product-info,
    .about-content,
    .contact-content {
        box-shadow: none;
        border: 1pt solid #ddd;
    }
}

/* 添加暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #f0f0f0;
        --light-text: #f0f0f0;
        --light-bg: #2c3e50;
        --dark-bg: #1a2530;
        --border-color: #4a5568;
    }
    
    body {
        background-color: #1e293b;
        color: var(--text-color);
    }
    
    header {
        background-color: rgba(30, 41, 59, 0.95);
    }
    
    header.scrolled {
        background-color: rgba(30, 41, 59, 0.98);
    }
    
    .logo h1 {
        color: var(--light-text);
    }
    
    nav ul li a {
        color: var(--light-text);
    }
    
    .mobile-menu-btn span {
        background-color: var(--light-text);
    }
    
    .feature-card,
    .contact-form,
    .info-item {
        background-color: #2c3e50;
        border-color: var(--border-color);
    }
    
    .feature-card p,
    .product-details p,
    .about-text p,
    .info-item p {
        color: #ccc;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        background-color: #1e293b;
        color: var(--light-text);
        border-color: var(--border-color);
    }
    
    .form-group label {
        color: var(--light-text);
    }
}