/* ===== 基础变量 ===== */
:root {
    --primary-color: #003c8f;
    --primary-light: #00a8e8;
    --secondary-color: #11998e;
    --accent-color: #ff6b6b;
    --dark-color: #2c3e50;
    --gray-color: #6c757d;
    --light-gray: #f8f9fa;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #003c8f 0%, #00a8e8 100%);
    --gradient-secondary: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 5px 15px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
}

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

ul {
    list-style: none;
}

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

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

/* ===== 按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 168, 232, 0.4);
}

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

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

.btn-block {
    display: block;
    width: 100%;
}

/* ===== 头部样式 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 50px;
    height: 50px;
}

.logo-icon img,
.logo-icon svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 2px;
}

.logo-en {
    font-size: 10px;
    color: var(--gray-color);
    letter-spacing: 1px;
}

/* ===== 导航菜单 ===== */
.nav {
    display: flex;
}

.nav-list {
    display: flex;
    gap: 5px;
}

.nav-list > li {
    position: relative;
}

.nav-list > li > a {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 28px 20px;
    font-size: 16px;
    color: var(--dark-color);
}

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

.nav-list > li:hover > a {
    color: var(--primary-color);
}

.nav-list .fa-chevron-down {
    font-size: 10px;
}

/* 子菜单 */
.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--white);
    box-shadow: var(--shadow);
    border-radius: 4px;
    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: 12px 20px;
    font-size: 14px;
    color: var(--dark-color);
    border-bottom: 1px solid #eee;
}

.submenu li:last-child a {
    border-bottom: none;
}

.submenu li a:hover {
    background: var(--light-gray);
    color: var(--primary-color);
    padding-left: 25px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Banner 轮播 ===== */
.banner {
    position: relative;
    height: 100vh;
    min-height: 600px;
    margin-top: 80px;
    overflow: hidden;
}

.banner-slider {
    position: relative;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.banner-slide.active {
    opacity: 1;
}

.banner-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.banner-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.banner-icon {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 300px;
    opacity: 0.1;
    color: var(--white);
}

/* 轮播控制 */
.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--white);
    transform: scale(1.2);
}

.banner-arrows {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
}

.arrow {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.arrow:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* ===== 通用区块样式 ===== */
.section {
    padding: 80px 0;
}

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

.section-header.light .section-tag,
.section-header.light .section-title,
.section-header.light .section-subtitle {
    color: var(--white);
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    color: var(--primary-light);
    letter-spacing: 3px;
    margin-bottom: 10px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--gray-color);
}

/* ===== 关于我们 ===== */
.about-section {
    background: var(--white);
}

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

.about-content h3 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-content p {
    margin-bottom: 20px;
    color: var(--gray-color);
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

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

.stat-num {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

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

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--light-gray);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 24px;
    color: var(--white);
}

.feature-card h4 {
    font-size: 16px;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.feature-card p {
    font-size: 14px;
    color: var(--gray-color);
}

/* ===== 愿景使命 ===== */
.vision-section {
    background: var(--gradient-primary);
}

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

.vision-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.vision-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 25px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vision-icon i {
    font-size: 30px;
    color: var(--white);
}

.vision-card h3 {
    font-size: 24px;
    color: var(--white);
    margin-bottom: 15px;
}

.vision-card p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

/* ===== 产品服务 ===== */
.products-section {
    background: var(--light-gray);
}

.products-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 40px;
    background: var(--white);
    border: 2px solid transparent;
    border-radius: 30px;
    font-size: 16px;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

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

.products-content {
    background: var(--white);
    border-radius: 10px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.product-tab {
    display: none;
}

.product-tab.active {
    display: block;
}

.product-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-item {
    padding: 25px 20px;
    background: var(--light-gray);
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.product-item:hover {
    background: var(--gradient-primary);
    transform: translateY(-5px);
}

.product-item:hover i,
.product-item:hover h4 {
    color: var(--white);
}

.product-item i {
    font-size: 30px;
    color: var(--primary-light);
    margin-bottom: 15px;
    display: block;
}

.product-item h4 {
    font-size: 14px;
    color: var(--dark-color);
    transition: var(--transition);
}

/* ===== 解决方案 ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.solution-img {
    height: 180px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.solution-img i {
    font-size: 60px;
    color: var(--white);
    opacity: 0.8;
}

.solution-content {
    padding: 30px;
}

.solution-content h3 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.solution-content p {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.7;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.solution-tags span {
    padding: 5px 12px;
    background: var(--light-gray);
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary-color);
}

/* ===== 企业优势 ===== */
.advantage-section {
    background: var(--gradient-primary);
}

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

.advantage-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 35px 25px;
    border-radius: 10px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.advantage-card:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.advantage-card h3 {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 15px;
}

.advantage-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
}

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

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

.partner-item {
    padding: 30px 20px;
    background: var(--light-gray);
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
}

.partner-item:hover {
    background: var(--gradient-primary);
    transform: translateY(-5px);
}

.partner-item:hover i,
.partner-item:hover span {
    color: var(--white);
}

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

.partner-item span {
    font-size: 14px;
    color: var(--dark-color);
    transition: var(--transition);
}

/* ===== 联系方式 ===== */
.contact-section {
    background: var(--light-gray);
}

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

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

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

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 22px;
    color: var(--white);
}

.contact-text h4 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.contact-text p {
    color: var(--gray-color);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
}

.contact-form h3 {
    font-size: 24px;
    color: var(--dark-color);
    margin-bottom: 30px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
}

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

.form-group textarea {
    height: 120px;
    resize: vertical;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--dark-color);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h4 {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 25px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-logo .logo-name {
    color: var(--white);
    font-size: 20px;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    font-size: 14px;
}

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

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

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-contact i {
    color: var(--primary-light);
    width: 20px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .product-list {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 20px;
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
    }
    
    .nav-list > li > a {
        padding: 15px 0;
        border-bottom: 1px solid #eee;
    }
    
    .submenu {
        position: static;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding-left: 20px;
    }
    
    .submenu li a {
        padding: 10px 0;
    }
    
    .has-submenu:hover .submenu,
    .has-submenu.active .submenu {
        transform: none;
    }
    
    .banner-content h2 {
        font-size: 36px;
    }
    
    .banner-content p {
        font-size: 16px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .vision-grid {
        grid-template-columns: 1fr;
    }
    
    .product-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-stats {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .products-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .product-list {
        grid-template-columns: 1fr;
    }
    
    .advantage-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .banner-icon {
        display: none;
    }
}

@media (max-width: 480px) {
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .logo-name {
        font-size: 18px;
    }
    
    .banner-content h2 {
        font-size: 28px;
    }
    
    .stat-num {
        font-size: 28px;
    }
}

/* ===== 轮播图图片背景 ===== */
.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0, 60, 143, 0.6) 0%, rgba(0, 60, 143, 0.3) 100%);
}

/* ===== 核心业务板块 ===== */
.core-business-section {
    background: var(--white);
}

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

.core-business-card {
    background: var(--light-gray);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

.core-business-icon i {
    font-size: 32px;
    color: var(--white);
}

.core-business-card h3 {
    font-size: 22px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.core-business-card > p {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 25px;
    line-height: 1.7;
}

.core-business-card ul {
    text-align: left;
    padding-left: 20px;
}

.core-business-card ul li {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 10px;
    position: relative;
    padding-left: 15px;
}

.core-business-card ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-light);
}

/* ===== 案例展示板块 ===== */
.case-studies {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-study-item {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.case-study-img {
    height: 220px;
    overflow: hidden;
}

.case-study-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-study-item:hover .case-study-img img {
    transform: scale(1.1);
}

.case-study-content {
    padding: 30px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-study-content h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.case-study-content p {
    font-size: 14px;
    color: var(--gray-color);
    line-height: 1.8;
    margin-bottom: 20px;
    flex: 1;
}

.case-study-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.case-study-tags span {
    padding: 6px 15px;
    background: var(--light-gray);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 500;
}

/* ===== 产品案例展示 ===== */
.gallery-section {
    background: var(--light-gray);
}

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

.gallery-showcase-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.gallery-showcase-img {
    height: 200px;
    overflow: hidden;
}

.gallery-showcase-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-showcase-item:hover .gallery-showcase-img img {
    transform: scale(1.1);
}

.gallery-showcase-info {
    padding: 25px;
}

.gallery-showcase-info h3 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.gallery-showcase-info p {
    font-size: 14px;
    color: var(--gray-color);
    line-height: 1.6;
}

/* ===== 响应式 - 核心业务和案例 ===== */
@media (max-width: 992px) {
    .core-business-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .case-studies {
        grid-template-columns: 1fr;
    }

    .gallery-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .core-business-card {
        padding: 30px 20px;
    }

    .gallery-showcase {
        grid-template-columns: 1fr;
    }
}

/* ===== 二维码样式 ===== */
.qrcode-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.2);
}

.qrcode-section h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 15px;
}

.qrcode-img {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* ===== 关于简介 ===== */
.about-intro {
    max-width: 900px;
    margin: 0 auto 50px;
    text-align: center;
}

.about-intro p {
    font-size: 16px;
    color: var(--gray-color);
    line-height: 2;
    margin-bottom: 15px;
}

/* ===== 解决方案卡片 ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.solution-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.solution-img {
    height: 160px;
    overflow: hidden;
}

.solution-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.solution-content {
    padding: 25px;
}

.solution-content h3 {
    font-size: 16px;
    color: var(--dark-color);
    margin-bottom: 10px;
    line-height: 1.4;
}

.solution-content p {
    font-size: 13px;
    color: var(--gray-color);
    line-height: 1.7;
    margin-bottom: 15px;
}

@media (max-width: 1200px) {
    .solutions-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 页面标题 ===== */
.page-header {
    position: relative;
    height: 300px;
    display: flex;
    align-items: center;
    margin-top: 80px;
    overflow: hidden;
}

.page-header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.9;
}

.page-header-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-header-content {
    position: relative;
    z-index: 1;
    color: var(--white);
    text-align: center;
}

.page-header-content h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

.breadcrumb {
    font-size: 14px;
    opacity: 0.9;
}

.breadcrumb a {
    color: var(--white);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    margin: 0 10px;
}

/* ===== 方案概述 ===== */
.solution-overview {
    background: var(--light-gray);
}

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

.solution-overview-text {
    flex: 1;
}

.solution-overview-text h2 {
    font-size: 28px;
    color: var(--dark-color);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.solution-overview-text h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
}

.solution-overview-text p {
    color: var(--gray-color);
    line-height: 1.8;
    margin-bottom: 15px;
}

.solution-overview-img {
    flex: 1;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.solution-overview-img img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

@media (max-width: 768px) {
    .solution-overview-content {
        flex-direction: column;
    }
    
    .solution-overview-img {
        order: -1;
    }
}

/* ===== 功能卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 35px 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 28px;
    color: var(--white);
}

.feature-card h3 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--gray-color);
    line-height: 1.7;
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 技术架构 ===== */
.architecture-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.architecture-item {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    width: 200px;
}

.arch-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.3;
    margin-bottom: 10px;
}

.architecture-item h3 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 10px;
}

.architecture-item p {
    font-size: 13px;
    color: var(--gray-color);
}

.architecture-arrow {
    color: var(--primary-color);
    font-size: 24px;
}

@media (max-width: 992px) {
    .architecture-arrow {
        display: none;
    }
    
    .architecture-item {
        width: 45%;
    }
}

@media (max-width: 576px) {
    .architecture-item {
        width: 100%;
    }
}

/* ===== 应用场景 ===== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.scenario-card {
    background: var(--white);
    padding: 40px 25px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
}

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

.scenario-card i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.scenario-card h3 {
    font-size: 18px;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.scenario-card p {
    font-size: 14px;
    color: var(--gray-color);
    line-height: 1.6;
}

@media (max-width: 992px) {
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 客户价值 ===== */
.solution-value {
    background: var(--dark-color);
}

.solution-value .section-header.light .section-tag,
.solution-value .section-header.light .section-title,
.solution-value .section-header.light .section-subtitle {
    color: var(--white);
}

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

.value-item {
    display: flex;
    gap: 15px;
    background: rgba(255, 255, 255, 0.1);
    padding: 25px;
    border-radius: 15px;
}

.value-icon {
    flex-shrink: 0;
}

.value-icon i {
    font-size: 24px;
    color: #38ef7d;
}

.value-text h4 {
    font-size: 16px;
    color: var(--white);
    margin-bottom: 8px;
}

.value-text p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

@media (max-width: 992px) {
    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .value-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 相关解决方案 ===== */
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.related-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.related-img {
    height: 180px;
    overflow: hidden;
}

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

.related-content {
    padding: 25px;
}

.related-content h4 {
    font-size: 16px;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.related-content p {
    font-size: 13px;
    color: var(--gray-color);
}

@media (max-width: 992px) {
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .related-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== CTA区域 ===== */
.cta-section {
    background: var(--gradient-primary);
    padding: 80px 0;
}

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

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

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

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

.cta-content .btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

/* 联系我们标题蓝色 */
.contact-us-text {
    color: var(--primary-color) !important;
}

/* 解决方案卡片整块可点击 - a标签样式 */
.solutions-grid a.solution-card {
    display: block;
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.solutions-grid a.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

.solutions-grid a.solution-card:hover .solution-img img {
    transform: scale(1.1);
}

/* 手机端关于亿捷能简介间距调整 */
@media (max-width: 768px) {
    .about-intro {
        padding: 0 10px;
    }
    
    .about-intro p {
        margin-bottom: 15px;
        line-height: 1.6;
    }
}