/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-color: #00d4aa;
    --accent-color: #ff6b6b;
    --dark-bg: #0a0e1a;
    --dark-secondary: #1a1f3a;
    --text-light: #ffffff;
    --text-gray: #a0a9c0;
    --card-bg: rgba(255, 255, 255, 0.05);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
}

.nav-logo i {
    color: var(--primary-color);
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

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

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

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-secondary) 100%);
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 50px rgba(102, 126, 234, 0.4);
}

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

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

.btn-full {
    width: 100%;
    justify-content: center;
}

/* 技术网格 */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.tech-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(20px);
    transition: var(--transition);
    cursor: pointer;
}

.tech-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
}

.tech-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

.tech-card span {
    font-weight: 600;
    font-size: 1.1rem;
}

/* 背景动画 */
.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.floating-element {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.floating-element:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-element:nth-child(2) {
    top: 60%;
    right: 10%;
    animation-delay: 7s;
}

.floating-element:nth-child(3) {
    bottom: 20%;
    left: 50%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(90deg); }
    50% { transform: translateY(0px) rotate(180deg); }
    75% { transform: translateY(20px) rotate(270deg); }
}

/* 通用区域样式 */
section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    text-align: center;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 解决方案 - 金字塔架构 */
.solutions {
    background: var(--dark-secondary);
    padding: 5rem 0;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-gray);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 金字塔解决方案容器 */
.pyramid-solution-container {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
    margin: 3rem 0;
}

/* 左侧金字塔 */
.pyramid-left {
    flex: 1;
    max-width: 500px;
}

/* 右侧内容展示 */
.pyramid-right {
    flex: 1;
    min-height: 500px;
}

.pyramid-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.pyramid-layer {
    background: var(--card-bg);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 1.5rem 2rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pyramid-layer:nth-child(1) { width: 50%; }
.pyramid-layer:nth-child(2) { width: 60%; }
.pyramid-layer:nth-child(3) { width: 70%; }
.pyramid-layer:nth-child(4) { width: 80%; }
.pyramid-layer:nth-child(5) { width: 90%; }

.pyramid-layer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.pyramid-layer:hover::before {
    opacity: 0.1;
}

.pyramid-layer:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.pyramid-layer.active {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.layer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
    z-index: 1;
}

.layer-content i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.layer-content span {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-light);
}

/* 右侧内容展示区域 */
.pyramid-content-display {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    min-height: 400px;
    position: relative;
}

.layer-detail {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    transition: all 0.3s ease;
}

.layer-detail.active {
    opacity: 1;
    visibility: visible;
    position: relative;
    padding: 0;
}

.layer-detail h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.layer-detail h3 i {
    color: var(--primary-color);
}

.layer-detail p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.detail-description {
    color: var(--text-gray);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

.layer-detail ul {
    list-style: none;
}

.layer-detail li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-gray);
}

.layer-detail li i {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 产品中心 - 统一字体系统 */
.products {
    background: var(--dark-bg);
    padding: 5rem 0;
}

/* 产品中心统一字体变量 */
.products {
    --product-title-size: 2rem;
    --product-subtitle-size: 1.1rem;
    --product-card-title-size: 1.3rem;
    --product-card-text-size: 1rem;
    --product-detail-title-size: 1.2rem;
    --product-detail-text-size: 0.95rem;
    --product-small-text-size: 0.9rem;
    
    --product-title-color: var(--text-light);
    --product-subtitle-color: var(--text-gray);
    --product-card-title-color: var(--text-light);
    --product-card-text-color: var(--text-gray);
    --product-highlight-color: var(--primary-color);
}

/* 响应式字体大小调整 */
@media (max-width: 768px) {
    .products {
        --product-title-size: 1.7rem;
        --product-subtitle-size: 1rem;
        --product-card-title-size: 1.2rem;
        --product-card-text-size: 0.95rem;
        --product-detail-title-size: 1.1rem;
        --product-detail-text-size: 0.9rem;
        --product-small-text-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .products {
        --product-title-size: 1.5rem;
        --product-subtitle-size: 0.95rem;
        --product-card-title-size: 1.1rem;
        --product-card-text-size: 0.9rem;
        --product-detail-title-size: 1rem;
        --product-detail-text-size: 0.85rem;
        --product-small-text-size: 0.8rem;
    }
}

.products-tabs {
    margin-top: 3rem;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 1rem 2rem;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--product-subtitle-color);
    font-size: var(--product-small-text-size);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--product-title-color);
}

.tab-btn.active {
    background: var(--primary-gradient);
    border-color: transparent;
    color: var(--product-title-color);
}

.tab-content {
    min-height: 600px;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

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

/* 设备BI分析产品卡片 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.product-card:hover::before {
    opacity: 0.05;
}

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

.product-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.product-icon i {
    font-size: 2rem;
    color: var(--text-light);
}

.product-card h3 {
    font-size: var(--product-card-title-size);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--product-card-title-color);
    position: relative;
    z-index: 1;
}

.product-card p {
    color: var(--product-card-text-color);
    font-size: var(--product-card-text-size);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.product-benefits {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.benefit-tag {
    background: rgba(102, 126, 234, 0.2);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* AI大模型应用展示 */
.ai-model-showcase {
    text-align: center;
}

.ai-model-intro {
    margin-bottom: 3rem;
}

.ai-model-intro h3 {
    font-size: var(--product-title-size);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--product-title-color);
}

.ai-model-intro p {
    font-size: var(--product-subtitle-size);
    color: var(--product-subtitle-color);
    max-width: 800px;
    margin: 0 auto;
}

.ai-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.ai-feature-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-feature-card.hover-effect:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.ai-feature-card .feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.ai-feature-card .feature-icon i {
    font-size: 1.5rem;
    color: var(--text-light);
}

.ai-feature-card h4 {
    font-size: var(--product-detail-title-size);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--product-card-title-color);
}

.ai-feature-card p {
    color: var(--product-card-text-color);
    font-size: var(--product-detail-text-size);
    line-height: 1.6;
}

/* 设备全周期管理展示 */
.lifecycle-showcase {
    text-align: center;
}

.lifecycle-intro {
    margin-bottom: 3rem;
}

.lifecycle-intro h3 {
    font-size: var(--product-title-size);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--product-title-color);
}

.lifecycle-intro p {
    font-size: var(--product-subtitle-size);
    color: var(--product-subtitle-color);
    max-width: 800px;
    margin: 0 auto;
}

.lifecycle-modules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.module-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.module-card.hover-expand:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.module-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.module-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.module-header h4 {
    font-size: var(--product-detail-title-size);
    font-weight: 600;
    color: var(--product-card-title-color);
}

.module-content p {
    color: var(--product-card-text-color);
    font-size: var(--product-detail-text-size);
    margin-bottom: 1rem;
}

.module-content ul {
    list-style: none;
    text-align: left;
}

.module-content li {
    color: var(--product-card-text-color);
    font-size: var(--product-small-text-size);
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
}

.module-content li::before {
    content: '•';
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* 物联网平台展示 */
.iot-showcase {
    text-align: center;
}

.iot-intro {
    margin-bottom: 3rem;
}

.iot-intro h3 {
    font-size: var(--product-title-size);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--product-title-color);
}

.iot-intro p {
    font-size: var(--product-subtitle-size);
    color: var(--product-subtitle-color);
    max-width: 800px;
    margin: 0 auto;
}

.iot-features {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.iot-feature {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
}

.iot-feature:nth-child(even) {
    grid-template-columns: 2fr 1fr;
}

.iot-feature:nth-child(even) .feature-visual {
    order: 2;
}

.iot-feature:nth-child(even) .feature-content {
    order: 1;
    text-align: right;
}

.feature-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-visual i {
    font-size: 4rem;
    color: var(--primary-color);
}

.feature-content h4 {
    font-size: var(--product-card-title-size);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--product-card-title-color);
}

.feature-content p {
    color: var(--product-card-text-color);
    font-size: var(--product-card-text-size);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.feature-content ul {
    list-style: none;
    text-align: left;
}

.feature-content li {
    color: var(--product-card-text-color);
    font-size: var(--product-small-text-size);
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    position: relative;
}

.feature-content li::before {
    content: '•';
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* 物联网平台详细内容样式 */
.iot-detail-content {
    margin-top: 1rem;
}

.iot-detail-content h5 {
    font-size: var(--product-detail-title-size);
    font-weight: 600;
    color: var(--product-highlight-color);
    margin: 1.5rem 0 0.8rem 0;
    border-left: 3px solid var(--product-highlight-color);
    padding-left: 0.8rem;
}

.iot-detail-content h5:first-child {
    margin-top: 0;
}

.iot-detail-content ul {
    margin-bottom: 1rem;
}

.iot-detail-content li {
    margin-bottom: 0.8rem;
    font-size: var(--product-small-text-size);
    color: var(--product-card-text-color);
    line-height: 1.5;
}

.iot-detail-content strong {
    color: var(--secondary-color);
}

/* 案例中心 */
.cases {
    background: var(--dark-secondary);
}

/* 客户LOGO展示 */
.client-logos {
    text-align: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.client-logos h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.logo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: #ffffff;
    border: 1px solid #d0d0d0;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.logo-placeholder:hover {
    background: #f8f8f8;
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.logo-placeholder i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.logo-placeholder span {
    color: #666666;
    font-weight: 500;
    font-size: 0.85rem;
}

/* 客户LOGO项目样式 */
.client-logo-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: #ffffff;
    border: 1px solid #ffffff;
    border-radius: var(--border-radius);
    transition: var(--transition);
    min-height: 90px;
}

.client-logo-item:hover {
    background: #f8f8f8;
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.client-logo-item img {
    max-width: 100%;
    max-height: 60px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: brightness(0.9) contrast(1.1);
    transition: var(--transition);
}

.client-logo-item:hover img {
    filter: brightness(1) contrast(1.2);
}

/* 客户LOGO响应式设计 */
@media (max-width: 1200px) {
    .logo-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 1.2rem;
    }
}

@media (max-width: 768px) {
    .logo-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 1rem;
    }
    
    .client-logo-item {
        min-height: 80px;
        padding: 0.8rem;
    }
    
    .client-logo-item img {
        max-height: 50px;
    }
}

@media (max-width: 480px) {
    .logo-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 0.8rem;
    }
    
    .client-logo-item {
        min-height: 70px;
        padding: 0.6rem;
    }
    
    .client-logo-item img {
        max-height: 40px;
    }
    
    .logo-placeholder i {
        font-size: 1.5rem;
    }
    
    .logo-placeholder span {
        font-size: 0.75rem;
    }
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.case-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    text-align: center;
    backdrop-filter: blur(20px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s;
}

.case-card:hover::before {
    left: 100%;
}

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

.case-image {
    width: 100px;
    height: 100px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.case-image i {
    font-size: 3rem;
    color: var(--text-light);
}

.case-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.case-card p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.case-benefits {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.benefit-tag {
    background: rgba(0, 212, 170, 0.2);
    color: var(--secondary-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--secondary-color);
}

/* 关于我们 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.highlight-item i {
    color: var(--primary-color);
    font-size: 2rem;
    min-width: 50px;
}

.highlight-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.highlight-item p {
    color: var(--text-gray);
    margin: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(20px);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-gray);
    font-weight: 500;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-info p {
    color: var(--text-gray);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.5rem;
    min-width: 40px;
}

.contact-item h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-gray);
    margin: 0;
}

.contact-form {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    backdrop-filter: blur(20px);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--text-light);
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-gray);
}

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

/* 页脚 */
.footer {
    background: var(--dark-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.footer-logo i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.footer p {
    color: var(--text-gray);
    margin: 0;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 50%;
    color: var(--text-light);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 14, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .tech-card {
        padding: 1.5rem;
    }
    
    /* 金字塔响应式 */
    /* 金字塔响应式布局 */
    .pyramid-solution-container {
        flex-direction: column;
        gap: 2rem;
    }
    
    .pyramid-left {
        max-width: 100%;
    }
    
    .pyramid-right {
        min-height: 300px;
    }
    
    .pyramid-content-display {
        padding: 1.5rem;
        min-height: 300px;
    }

    .pyramid-layer:nth-child(1) { width: 75%; }
    .pyramid-layer:nth-child(2) { width: 80%; }
    .pyramid-layer:nth-child(3) { width: 85%; }
    .pyramid-layer:nth-child(4) { width: 90%; }
    .pyramid-layer:nth-child(5) { width: 95%; }
    
    .pyramid-layer {
        padding: 1rem 1.5rem;
    }
    
    .layer-content span {
        font-size: 1rem;
    }
    
    .layer-detail {
        padding: 1.5rem;
    }
    
    /* 产品标签页响应式 */
    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-btn {
        width: 80%;
        text-align: center;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .ai-features-grid {
        grid-template-columns: 1fr;
    }
    
    .lifecycle-modules {
        grid-template-columns: 1fr;
    }
    
    .iot-feature {
        grid-template-columns: 1fr !important;
        text-align: center;
    }
    
    .iot-feature:nth-child(even) .feature-visual {
        order: 0;
    }
    
    .iot-feature:nth-child(even) .feature-content {
        order: 0;
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    /* 移动端金字塔优化 */
    /* 移动端金字塔布局 */
    .pyramid-solution-container {
        gap: 1.5rem;
    }
    
    .pyramid-content-display {
        padding: 1rem;
        min-height: 250px;
    }
    
    .detail-description {
        font-size: 1rem;
        padding: 0.8rem;
    }

    .pyramid-layer:nth-child(1) { width: 80%; }
    .pyramid-layer:nth-child(2) { width: 85%; }
    .pyramid-layer:nth-child(3) { width: 90%; }
    .pyramid-layer:nth-child(4) { width: 95%; }
    .pyramid-layer:nth-child(5) { width: 100%; }
    
    .pyramid-layer {
        padding: 0.8rem 1rem;
    }
    
    .layer-content i {
        font-size: 1.2rem;
    }
    
    .layer-content span {
        font-size: 0.9rem;
    }
    
    .layer-detail {
        padding: 1rem;
    }
    
    .layer-detail h3 {
        font-size: 1.2rem;
    }
    
    /* 移动端标签页优化 */
    .tab-btn {
        width: 90%;
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }
    
    .product-card,
    .ai-feature-card,
    .module-card {
        padding: 1.5rem;
    }
    
    .ai-model-intro h3,
    .lifecycle-intro h3,
    .iot-intro h3 {
        font-size: 1.5rem;
    }
    
    .feature-visual i {
        font-size: 3rem;
    }
    
    .case-card {
        padding: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* AOS动画增强 */
[data-aos] {
    pointer-events: none;
}

[data-aos].aos-animate {
    pointer-events: auto;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6b4d8a 100%);
}

/* 选择文本样式 */
::selection {
    background: rgba(102, 126, 234, 0.3);
    color: var(--text-light);
}

/* 链接焦点样式 */
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 按钮焦点样式 */
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 产品展示样式增强 */
.product-showcase {
    margin: 2rem 0;
}

.product-detail-cards {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.detail-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.detail-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.detail-card.featured {
    border: 2px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.detail-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.card-title h4 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin: 0;
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
    display: block;
}

.card-content {
    margin-bottom: 1.5rem;
}

.content-section {
    margin-bottom: 1.5rem;
}

.content-section h5 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.benefit-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefit-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.benefit-list li strong {
    color: var(--primary-color);
    font-weight: 600;
}

.card-image {
    margin-top: 1.5rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.card-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

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

/* 为AI模型和其他模块添加图片展示 */
.ai-feature-card, .module-card {
    position: relative;
}

.feature-image, .module-image {
    margin-top: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feature-image img, .module-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.feature-image:hover img, .module-image:hover img {
    transform: scale(1.02);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .card-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .card-title h4 {
        font-size: 1.2rem;
    }
    
    .detail-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .detail-card {
        padding: 1rem;
    }
    
    .card-icon {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
}

/* 物联网平台图片样式 */
.iot-feature-image {
    margin-top: 1.5rem;
    text-align: center;
}

.iot-feature-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
}

.iot-feature-image img:hover {
    transform: scale(1.05);
}

.iot-feature-images {
    margin-top: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.iot-feature-images img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
}

.iot-feature-images img:hover {
    transform: scale(1.05);
}

/* 设备大模型应用总体介绍样式 */
.ai-model-overview {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.overview-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.overview-header h3 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-light);
    font-weight: 600;
}

.overview-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--text-gray);
    max-width: 900px;
    margin: 0 auto 2rem auto;
}

.overview-main-image {
    margin: 2rem 0;
    text-align: center;
    width: 100%;
    overflow: hidden;
}

/* 设备全周期管理样式 */
.lifecycle-overview {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.lifecycle-concept {
    margin-top: 3rem;
}

.lifecycle-concept h4 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
    text-align: center;
}

.lifecycle-concept p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.lifecycle-benefits h5 {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    text-align: center;
}

.benefits-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    background: rgba(255, 255, 255, 0.03);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.benefit-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
    flex-shrink: 0;
}

.benefit-item strong {
    display: block;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.section-divider {
    position: relative;
    text-align: center;
    margin: 4rem 0;
}

.section-divider:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.section-divider span {
    position: relative;
    background: var(--bg-color);
    padding: 0 1.5rem;
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
}

.function-animation {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.animation-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.animation-header h4 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-light);
    font-weight: 600;
}

.animation-header p {
    font-size: 1.1rem;
    color: var(--text-gray);
}

.animation-container {
    text-align: center;
}

.overview-main-image img {
    max-width: 100%;
    width: auto;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    object-fit: contain;
}

.overview-main-image img:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.overview-benefits {
    margin: 2.5rem 0;
}

.overview-benefits h4 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-weight: 600;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.benefit-item {
    background: rgba(255,255,255,0.03);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.benefit-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.08);
    border-color: var(--primary-color);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.benefit-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.benefit-content h5 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
    font-weight: 600;
}

.benefit-content p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-gray);
    margin: 0;
}

.overview-conclusion {
    text-align: center;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.overview-conclusion p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: var(--text-gray);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    margin-top: 1.5rem;
}

.cta-button .btn {
    padding: 12px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 25px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.cta-button .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .ai-model-overview {
        padding: 2rem 1.5rem;
        margin-bottom: 2rem;
    }
    
    .overview-header h3 {
        font-size: 2rem;
    }
    
    .overview-subtitle {
        font-size: 1.1rem;
    }
    
    .overview-main-image img {
        max-width: 95%;
        width: auto;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .benefit-item {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }
    
         .benefit-icon {
         margin: 0 auto 1rem auto;
     }
}

/* 核心功能模块预览样式 */
.overview-modules {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.overview-modules h4 {
    text-align: center;
    font-size: var(--product-title-size);
    margin-bottom: 1rem;
    color: var(--product-highlight-color);
    font-weight: 600;
}

.modules-subtitle {
    text-align: center;
    font-size: var(--product-subtitle-size);
    color: var(--product-subtitle-color);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.module-preview {
    background: rgba(255,255,255,0.03);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255,255,255,0.1);
    text-align: left;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.module-preview:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.08);
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.module-preview-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    margin: 0 0 1rem 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.module-preview:hover .module-preview-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.module-preview h5 {
    font-size: var(--product-detail-title-size);
    color: var(--product-card-title-color);
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.module-preview p {
    font-size: var(--product-detail-text-size);
    color: var(--product-card-text-color);
    line-height: 1.5;
    margin: 0 0 1rem 0;
    flex-grow: 1;
}

.module-preview-image {
    margin-top: auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.module-preview-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.module-preview:hover .module-preview-image img {
    transform: scale(1.05);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .modules-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .module-preview {
        padding: 1.5rem;
    }
    
    .module-preview-icon {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
    
    .module-preview-image img {
        height: 150px;
    }
    
    .overview-modules h4 {
        font-size: 1.5rem;
    }
}

/* 功能简要展示区域样式 */
.function-summary-area {
    margin-top: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.function-item {
    padding: 1.5rem;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.function-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.function-item h5 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    border-bottom: 2px solid rgba(102, 126, 234, 0.3);
    padding-bottom: 0.8rem;
}

.function-item h5 i {
    font-size: 1.3rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.function-item ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.function-item li {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 0.8rem;
    padding-left: 1.2rem;
    position: relative;
}

.function-item li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .function-summary-area {
        margin-top: 1.5rem;
        padding: 1.5rem;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .function-item {
        padding: 1rem;
    }
    
    .function-item h5 {
        font-size: 1.1rem;
        gap: 0.6rem;
    }
    
    .function-item h5 i {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .function-summary-area {
        padding: 1rem;
        gap: 1rem;
    }
    
    .function-item h5 {
        font-size: 1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .function-item li {
        font-size: 0.9rem;
        margin-bottom: 0.6rem;
    }
}