/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* 头部导航 */
.site-header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    backdrop-filter: blur(10px);
}

.main-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-links a:hover {
    color: #3498db;
}

/* CTA按钮 */
.cta-button {
    padding: 10px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background: #2c3e50;
    border-radius: 3px;
    transition: all 0.3s;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: white;
    padding: 100px 20px 40px;
    z-index: 9999;
}

.mobile-menu.active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
    color: #2c3e50;
    transition: transform 0.3s ease;
    z-index: 10000;
}

.mobile-menu-close:hover {
    transform: rotate(90deg);
}

.mobile-menu-close svg {
    width: 100%;
    height: 100%;
}

.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 25px;
    text-align: center;
    margin-bottom: 30px;
}

.mobile-nav-links a {
    text-decoration: none;
    color: #333;
    font-size: 20px;
    font-weight: 500;
}

.mobile-cta-button {
    padding: 12px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 18px;
}

/* 主要内容区域 */
.site-main {
    min-height: calc(100vh - 200px);
}

/* 通用区块样式 */
section {
    padding: 80px 20px;
}

section h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 36px;
    color: #2c3e50;
}

/* Hero区域 - 全屏视口 */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
    padding: 0 20px;
    overflow: hidden;
    background: linear-gradient(135deg, #0c0c1e 0%, #1a1a3e 50%, #0f0f2a 100%);
}

/* 科技感渐变背景 */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(102, 126, 234, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(118, 75, 162, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(52, 152, 219, 0.2) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
}

/* 网格线背景 */
.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(102, 126, 234, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 1;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

/* 几何图形装饰 */
.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.shape {
    position: absolute;
    opacity: 0.1;
    border: 2px solid rgba(102, 126, 234, 0.5);
}

/* 圆形 */
.shape-1 {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    top: 10%;
    left: 5%;
    animation: float1 15s ease-in-out infinite;
}

/* 六边形 */
.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 10%;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    animation: float2 12s ease-in-out infinite;
}

/* 三角形 */
.shape-3 {
    width: 0;
    height: 0;
    border-left: 100px solid transparent;
    border-right: 100px solid transparent;
    border-bottom: 173px solid rgba(102, 126, 234, 0.3);
    top: 20%;
    right: 20%;
    animation: rotate 20s linear infinite;
}

/* 菱形 */
.shape-4 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 15%;
    transform: rotate(45deg);
    animation: float3 10s ease-in-out infinite;
}

/* 小圆形 */
.shape-5 {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    bottom: 30%;
    right: 30%;
    animation: pulse 3s ease-in-out infinite;
}

/* 动画关键帧 */
@keyframes float1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-20px, -20px) rotate(10deg); }
}

@keyframes float3 {
    0%, 100% { transform: rotate(45deg) translate(0, 0); }
    50% { transform: rotate(50deg) translate(10px, -10px); }
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.1; }
    50% { transform: scale(1.2); opacity: 0.2; }
}

/* Hero内容区域 */
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 100%;
    animation: fadeInUp 1s ease-out;
}

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

.hero-section h1 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 2px 20px rgba(102, 126, 234, 0.5);
    background: linear-gradient(90deg, #667eea, #764ba2, #3498db, #667eea);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textGradient 5s linear infinite;
}

@keyframes textGradient {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.hero-subtitle {
    font-size: 22px;
    opacity: 0.9;
    margin-bottom: 60px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 核心价值主张 */
.hero-values {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.value-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 16px;
    padding: 30px 25px;
    width: 240px;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease-out;
}

.value-item:nth-child(1) { animation-delay: 0.2s; }
.value-item:nth-child(2) { animation-delay: 0.4s; }
.value-item:nth-child(3) { animation-delay: 0.6s; }

.value-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
}

.value-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.value-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #667eea;
}

.value-item p {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.6;
}

/* CTA按钮 */
.hero-cta {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.btn {
    display: inline-block;
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(102, 126, 234, 0.5);
}

.btn-secondary:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

/* 滚动提示 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: 10px;
}

.scroll-arrow {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(102, 126, 234, 0.5);
    border-radius: 15px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: #667eea;
    border-radius: 50%;
    animation: scrollDown 1.5s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

@keyframes scrollDown {
    0% { top: 10px; opacity: 1; }
    100% { top: 30px; opacity: 0; }
}

/* 服务区块 */
.services-section {
    background: #f8f9fa;
}

.section-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 50px;
    font-size: 18px;
}

/* 服务网格 */
.services-grid,
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.service-item,
.case-item {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.15);
}

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
}

.service-item h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 22px;
}

.service-item p {
    color: #666;
    line-height: 1.7;
}

/* 关于我们区域 */
.about-section {
    background: #fff;
    position: relative;
    overflow: hidden;
}

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

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

.about-header h2 {
    margin-bottom: 15px;
}

.about-subtitle {
    font-size: 18px;
    color: #667eea;
    font-weight: 500;
}

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

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
}

.image-decoration {
    position: absolute;
    border-radius: 12px;
    z-index: -1;
}

.decoration-1 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #3498db, #667eea);
    top: -20px;
    right: -20px;
    opacity: 0.3;
}

.decoration-2 {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, #764ba2, #667eea);
    bottom: -30px;
    left: -30px;
    opacity: 0.2;
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.about-text h3 {
    font-size: 32px;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.3;
}

.about-text p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.about-features {
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(5px);
    background: #f0f2f5;
}

.feature-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
}

.feature-content h4 {
    font-size: 18px;
    color: #2c3e50;
    margin-bottom: 5px;
}

.feature-content p {
    font-size: 14px;
    color: #666;
    margin-bottom: 0;
}

.about-stats {
    display: flex;
    gap: 40px;
    padding-top: 20px;
    border-top: 2px solid #f0f2f5;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: #666;
    margin-top: 5px;
}

/* 联系表单 */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-form button {
    padding: 15px 30px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.3s;
}

.contact-form button:hover {
    background: #2980b9;
}

/* 页脚 */
.site-footer {
    background: linear-gradient(135deg, #0c0c1e 0%, #1a1a3e 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(102, 126, 234, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px 30px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-section {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 25px;
}

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

.social-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 25px;
    color: white;
    position: relative;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-nav a:hover {
    color: #667eea;
    transform: translateX(5px);
}

.contact-info {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.contact-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
}

.contact-icon svg {
    width: 18px;
    height: 18px;
}

.contact-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    padding-top: 8px;
}

.footer-bottom {
    position: relative;
}

.footer-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.3), transparent);
    margin-bottom: 30px;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    gap: 25px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
    color: #667eea;
}

/* 主要内容区域调整，避免被固定导航遮挡 */
.site-main {
    padding-top: 70px;
}

/* 触摸友好优化 */
a, button {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

/* 可点击元素的触摸区域优化 */
.nav-links a,
.footer-nav a,
.social-link,
.hamburger,
.btn,
.contact-form button {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* 响应式适配 - 1440px及以上大屏优化 */
@media (min-width: 1440px) {
    .container,
    .about-container,
    .services-grid,
    .cases-grid,
    .news-grid {
        max-width: 1400px;
    }

    .hero-content {
        max-width: 1300px;
    }

    .footer-container {
        max-width: 1400px;
    }

    section {
        padding: 100px 20px;
    }

    section h2 {
        font-size: 42px;
    }
}

/* 响应式适配 - 1024px平板优化 */
@media (max-width: 1024px) and (min-width: 769px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-image {
        max-width: 600px;
        margin: 0 auto;
    }

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

    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

/* 响应式适配 - 768px平板/小屏优化 */
@media (max-width: 768px) {
    .nav-links,
    .cta-button {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-section h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-values {
        gap: 20px;
    }

    .value-item {
        width: 100%;
        max-width: 280px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .shape-1 {
        width: 150px;
        height: 150px;
    }

    .shape-2 {
        width: 80px;
        height: 80px;
    }

    .shape-3 {
        border-left: 50px solid transparent;
        border-right: 50px solid transparent;
        border-bottom: 86px solid rgba(102, 126, 234, 0.3);
    }

    section {
        padding: 40px 20px;
    }
    
    .about-header {
        margin-bottom: 40px;
    }
    
    .about-text h3 {
        font-size: 24px;
    }
    
    .about-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .decoration-1,
    .decoration-2 {
        display: none;
    }
    
    .image-placeholder {
        font-size: 60px;
    }

    .cases-section .cases-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .footer-container {
        padding: 60px 20px 25px;
    }

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

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

/* 案例展示区 */
.cases-section {
    background: linear-gradient(135deg, #0c0c1e 0%, #1a1a3e 100%);
    position: relative;
    overflow: hidden;
}

.cases-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(102, 126, 234, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.cases-section .section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.cases-section h2 {
    color: white;
    margin-bottom: 15px;
}

.cases-section .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
    font-size: 18px;
}

.cases-section .cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.case-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.case-card:hover {
    transform: translateY(-10px);
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 
        0 20px 60px rgba(102, 126, 234, 0.3),
        0 0 0 1px rgba(102, 126, 234, 0.1) inset;
}

.case-card:hover::before {
    opacity: 1;
}

.case-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.case-img-placeholder {
    width: 100%;
    height: 100%;
}

.case-img-placeholder svg {
    width: 100%;
    height: 100%;
    display: block;
}

.case-real-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

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

.case-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(12, 12, 30, 0.9) 0%, rgba(12, 12, 30, 0.2) 50%, transparent 100%);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.case-card:hover .case-overlay {
    opacity: 1;
}

.case-view-btn {
    padding: 10px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 25px;
    font-weight: 600;
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

.case-card:hover .case-view-btn {
    transform: translateY(0);
}

.case-content {
    padding: 25px;
}

.case-category {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    color: #667eea;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.case-title {
    color: white;
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    line-height: 1.4;
}

/* 响应式适配 - 480px小屏手机优化 */
@media (max-width: 480px) {
    .hero-section h1 {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .value-item {
        padding: 20px 15px;
    }

    .value-icon {
        font-size: 32px;
    }

    .value-item h3 {
        font-size: 18px;
    }

    .case-content {
        padding: 20px;
    }

    .case-title {
        font-size: 16px;
    }

    .news-content {
        padding: 18px;
    }
    
    .news-title {
        font-size: 15px;
    }
    
    .news-summary {
        font-size: 13px;
    }
}

/* 客户痛点说明模块样式 */
.pain-points-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

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

.pain-points-section h2 {
    font-size: 36px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.pain-points-section .section-subtitle {
    color: #666;
    font-size: 18px;
}

.pain-points-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.pain-point-card {
    background: white;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.pain-point-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #3498db);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.pain-point-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.2);
}

.pain-point-card:hover::before {
    transform: scaleX(1);
}

.pain-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.pain-point-card:hover .pain-icon {
    transform: scale(1.1) rotate(5deg);
}

.pain-title {
    font-size: 22px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 12px;
}

.pain-description {
    color: #666;
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 25px;
}

.solution-box {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    padding: 20px;
    border-radius: 12px;
    border-left: 3px solid #667eea;
}

.solution-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: #667eea;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.solution-text {
    font-size: 14px;
    color: #444;
    line-height: 1.5;
    margin: 0;
}

/* 客户痛点模块响应式适配 */
@media (max-width: 1024px) {
    .pain-points-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pain-points-section {
        padding: 50px 20px;
    }
    
    .pain-points-section h2 {
        font-size: 28px;
    }
    
    .pain-points-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .pain-point-card {
        padding: 30px 25px;
    }
}

@media (max-width: 480px) {
    .pain-points-section {
        padding: 40px 15px;
    }
    
    .pain-points-section h2 {
        font-size: 24px;
    }
    
    .pain-title {
        font-size: 19px;
    }
}

/* 案例统计数据样式 */
.case-stats {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

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

.case-stat-value {
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
}

.case-stat-label {
    font-size: 12px;
    color: #888;
}

/* 客户背书模块样式 */
.testimonials-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #1a1a3e 0%, #0f0f2a 100%);
    color: white;
}

.testimonials-section .section-header h2 {
    color: white;
}

.testimonials-section .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.clients-logos {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.client-logo {
    font-size: 16px;
    opacity: 0.7;
    padding: 10px 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    transition: all 0.3s;
}

.client-logo:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 35px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.testimonial-quote {
    font-size: 60px;
    color: #667eea;
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 15px;
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 25px;
    color: rgba(255, 255, 255, 0.9);
}

.testimonial-author {
    display: flex;
    gap: 15px;
    align-items: center;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
}

.author-info h4 {
    margin: 0;
    font-size: 16px;
}

.author-info p {
    margin: 5px 0 0;
    font-size: 13px;
    opacity: 0.7;
}

/* 团队介绍模块样式 */
.team-section {
    padding: 80px 20px;
    background: white;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.team-card {
    text-align: center;
    padding: 40px 30px;
    background: #f8f9fa;
    border-radius: 16px;
    transition: all 0.3s;
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.15);
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: white;
    font-weight: 600;
}

.team-name {
    font-size: 22px;
    margin: 0 0 8px;
    color: #2c3e50;
}

.team-role {
    font-size: 14px;
    color: #667eea;
    margin: 0 0 15px;
    font-weight: 600;
}

.team-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.team-social {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 16px;
}

.social-link:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scale(1.1);
}

/* FAQ模块样式 */
.faq-section {
    padding: 80px 20px;
    background: #f8f9fa;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    margin-bottom: 15px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.faq-question {
    width: 100%;
    padding: 25px 30px;
    background: white;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 17px;
    font-weight: 600;
    color: #2c3e50;
    transition: all 0.3s;
}

.faq-question:hover {
    background: rgba(102, 126, 234, 0.05);
}

.faq-icon {
    font-size: 24px;
    color: #667eea;
    font-weight: 300;
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 30px 25px 30px;
    max-height: 500px;
}

.faq-answer p {
    margin: 0;
    line-height: 1.8;
    color: #666;
    font-size: 15px;
}

/* 客户背书模块响应式适配 */
@media (max-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .clients-logos {
        gap: 20px;
    }
    .client-logo {
        font-size: 14px;
    }
    .faq-question {
        font-size: 15px;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .team-grid {
        grid-template-columns: 1fr;
    }
}

/* 3D BIM模型查看器样式 */
.viewer-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #0f0f2a 0%, #1a1a3e 100%);
    color: white;
}

.viewer-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

.viewer-main {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.viewer-canvas {
    background: #1a1a3e;
    border-radius: 16px;
    height: 500px;
    border: 2px solid rgba(102, 126, 234, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: grab;
    position: relative;
}

.viewer-placeholder {
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.building-icon {
    font-size: 80px;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.viewer-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(102, 126, 234, 0.2);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.model-grid {
    display: grid;
    grid-template-rows: repeat(3, 1fr);
    gap: 10px;
    width: 80%;
    height: 80%;
}

.model-floor {
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: floorAppear 0.5s ease-out;
}

@keyframes floorAppear {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.viewer-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.control-btn {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    border: 2px solid rgba(102, 126, 234, 0.3);
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    font-size: 24px;
    transition: all 0.3s;
}

.control-btn:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: #667eea;
    transform: scale(1.1);
}

.control-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: transparent;
}

.viewer-info {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.viewer-info h3 {
    margin-bottom: 25px;
    font-size: 20px;
    color: white;
}

.info-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.info-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.info-value {
    font-size: 16px;
    font-weight: 600;
}

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

.model-stats h4 {
    margin-bottom: 15px;
    font-size: 16px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
}

.stat-good {
    color: #4ecdc4;
}

.load-model-btn {
    width: 100%;
    margin-top: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.load-model-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

/* AI造价系统样式 */
.cost-section {
    padding: 80px 20px;
    background: white;
}

.cost-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.cost-input-panel,
.cost-result-panel {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 30px;
    border: 1px solid #e8e8e8;
}

.cost-input-panel h3,
.cost-result-panel h3 {
    margin-bottom: 25px;
    color: #2c3e50;
    font-size: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #444;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-input,
.form-select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e8e8e8;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.calculate-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 10px;
    transition: all 0.3s;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.total-cost {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: white;
    margin-bottom: 25px;
}

.total-label {
    display: block;
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.total-value {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 5px;
}

.total-value .amount {
    font-size: 48px;
    font-weight: bold;
}

.total-value .unit {
    font-size: 24px;
}

.cost-breakdown {
    margin-bottom: 25px;
}

.cost-breakdown h4 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.breakdown-item {
    margin-bottom: 15px;
}

.breakdown-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-weight: 500;
}

.breakdown-bar {
    height: 12px;
    background: #e8e8e8;
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 5px;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 6px;
    transition: width 0.5s ease;
}

.breakdown-value {
    font-size: 13px;
    color: #666;
}

.action-btn {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.action-btn.secondary {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border: 2px solid rgba(102, 126, 234, 0.3);
}

.action-btn.secondary:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
}

/* 报表生成模块样式 */
.reports-section {
    padding: 80px 20px;
    background: #f8f9fa;
}

.reports-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.report-templates,
.report-preview {
    background: white;
    border-radius: 16px;
    padding: 30px;
    border: 1px solid #e8e8e8;
}

.report-templates h3,
.report-preview h3 {
    margin-bottom: 25px;
    color: #2c3e50;
    font-size: 20px;
}

.templates-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.template-card {
    padding: 20px;
    border: 2px solid #e8e8e8;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
}

.template-card:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.template-card.active {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.template-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.template-card h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.template-card p {
    font-size: 13px;
    color: #666;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 2px solid #e8e8e8;
    padding-bottom: 20px;
    margin-bottom: 25px;
}

.report-title h4 {
    margin-bottom: 5px;
    color: #2c3e50;
}

.report-title p {
    font-size: 13px;
    color: #666;
}

.preview-actions {
    display: flex;
    gap: 10px;
}

.preview-btn {
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid #e8e8e8;
    background: white;
}

.preview-btn:hover {
    border-color: #667eea;
    color: #667eea;
}

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

.preview-chart,
.preview-table {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.preview-chart h5,
.preview-table h5 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.chart-placeholder {
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.pie-segment {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    transform-origin: center;
    clip-path: polygon(50% 50%, 50% 0%, 100% 0%);
}

.report-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.report-table th,
.report-table td {
    padding: 12px 8px;
    text-align: left;
    border-bottom: 1px solid #e8e8e8;
}

.report-table th {
    background: rgba(102, 126, 234, 0.1);
    font-weight: 600;
    color: #2c3e50;
}

.report-table tr:hover td {
    background: rgba(102, 126, 234, 0.05);
}

/* 新增模块响应式适配 */
@media (max-width: 1024px) {
    .viewer-container,
    .cost-container,
    .reports-container {
        grid-template-columns: 1fr;
    }
    
    .preview-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .viewer-canvas {
        height: 350px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .total-value .amount {
        font-size: 36px;
    }
    
    .preview-header {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .viewer-section,
    .cost-section,
    .reports-section {
        padding: 50px 15px;
    }
    
    .building-icon {
        font-size: 60px;
    }
}

/* 响应式适配 - 480px小屏手机优化 */
@media (max-width: 480px) {
    .footer-bottom-links {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .stat-number {
        font-size: 24px;
    }
    
    .date-day {
        font-size: 24px;
    }
}

/* 响应式适配 - 320px超小屏手机优化 */
@media (max-width: 320px) {
    .main-nav {
        padding: 12px 15px;
    }

    .logo {
        font-size: 20px;
    }

    .hero-section {
        padding: 0 15px;
    }

    .hero-section h1 {
        font-size: 24px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .value-item {
        padding: 15px 12px;
        width: 100%;
        max-width: 100%;
    }

    .value-icon {
        font-size: 28px;
    }

    .value-item h3 {
        font-size: 16px;
    }

    .value-item p {
        font-size: 13px;
    }

    .btn {
        padding: 12px 30px;
        font-size: 16px;
    }

    section {
        padding: 30px 15px;
    }

    section h2 {
        font-size: 24px;
    }

    .section-subtitle {
        font-size: 14px;
    }

    .about-text h3 {
        font-size: 20px;
    }

    .about-stats {
        gap: 15px;
    }

    .service-item,
    .case-card,
    .news-card {
        border-radius: 12px;
    }

    .contact-form input,
    .contact-form textarea {
        padding: 12px;
        font-size: 14px;
    }

    .contact-form button {
        padding: 12px 25px;
        font-size: 16px;
    }
}

/* 新闻动态区域 */
.news-section {
    background: #fff;
    position: relative;
    overflow: hidden;
}

.news-section .section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.news-section h2 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.news-section .section-subtitle {
    color: #667eea;
    font-size: 18px;
    font-weight: 500;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.news-card {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
}

.news-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    border-radius: 16px;
}

.news-card:hover {
    transform: translateY(-10px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.15);
}

.news-card:hover::before {
    opacity: 1;
}

.news-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
}

.news-img-placeholder {
    width: 100%;
    height: 100%;
}

.news-img-placeholder svg {
    width: 100%;
    height: 100%;
    display: block;
}

.news-real-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

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

.news-content {
    padding: 25px;
    position: relative;
}

.news-date {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    margin-bottom: 15px;
}

.date-day {
    font-size: 28px;
    font-weight: bold;
    color: white;
    line-height: 1;
}

.date-month {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 4px;
}

.news-title {
    color: #2c3e50;
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 12px 0;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.news-card:hover .news-title {
    color: #667eea;
}

.news-summary {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
    margin: 0 0 20px 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    display: inline-flex;
    align-items: center;
    color: #667eea;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.news-link:hover {
    color: #764ba2;
    transform: translateX(5px);
}

/* 新闻区域响应式适配 */
@media (max-width: 1200px) {
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

@media (max-width: 768px) {
    .news-section .section-header {
        margin-bottom: 40px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .news-content {
        padding: 20px;
    }
    
    .news-title {
        font-size: 16px;
    }
    
    .date-day {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .news-content {
        padding: 18px;
    }
    
    .news-title {
        font-size: 15px;
    }
    
    .news-summary {
        font-size: 13px;
    }
}

/* AI智能客服组件样式 */
.ai-chatbot-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
}

.ai-chatbot-toggle {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    position: relative;
}

.ai-chatbot-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(102, 126, 234, 0.6);
}

.chatbot-icon {
    width: 32px;
    height: 32px;
    color: white;
}

.chatbot-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ff6b6b;
    color: white;
    font-size: 10px;
    font-weight: bold;
    padding: 4px 8px;
    border-radius: 10px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.ai-chatbot-window {
    width: 400px;
    height: 550px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 60px rgba(102, 126, 234, 0.2);
    position: absolute;
    bottom: 80px;
    right: 0;
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

.ai-chatbot-window.active {
    display: flex;
}

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

.ai-chatbot-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    color: white;
}

.ai-avatar {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-avatar svg {
    width: 30px;
    height: 30px;
}

.ai-info h4 {
    margin: 0;
    font-size: 16px;
}

.ai-status {
    font-size: 12px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 5px;
}

.ai-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #51cf66;
    border-radius: 50%;
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.ai-close-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: background 0.3s;
}

.ai-close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.ai-close-btn svg {
    width: 18px;
    height: 18px;
}

.ai-chatbot-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: #f8f9fa;
}

.ai-message {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.user-message {
    display: flex;
    flex-direction: row-reverse;
    gap: 10px;
    margin-bottom: 15px;
}

.ai-avatar-small {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.ai-avatar-small svg {
    width: 20px;
    height: 20px;
}

/* 案例详情弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    max-width: 1000px;
    max-height: 90vh;
    margin: 5vh auto;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.3s ease-out;
}

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

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    color: #333;
    font-size: 28px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.modal-close:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    transform: rotate(90deg);
}

.modal-header {
    padding: 30px 30px 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 1px solid #eee;
}

.modal-category {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 15px;
}

.modal-header h2 {
    margin: 0;
    font-size: 28px;
    color: #2c3e50;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
}

.modal-image {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: white;
}

.modal-info {
    line-height: 1.8;
}

.modal-section {
    margin-bottom: 30px;
}

.modal-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-section h3::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.modal-description {
    color: #555;
    font-size: 15px;
}

.modal-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.modal-stat-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    padding: 25px 20px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.modal-stat-value {
    display: block;
    font-size: 24px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.modal-stat-label {
    color: #777;
    font-size: 14px;
}

.modal-highlights,
.modal-services {
    list-style: none;
    padding: 0;
    margin: 0;
}

.modal-highlights li,
.modal-services li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: #555;
    border-bottom: 1px solid #f0f0f0;
}

.modal-highlights li:last-child,
.modal-services li:last-child {
    border-bottom: none;
}

.modal-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.modal-services li::before {
    content: '•';
    position: absolute;
    left: 0;
    width: 22px;
    height: 22px;
    color: #667eea;
    font-weight: bold;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 案例卡片增强样式 */
.case-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-10px);
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 
        0 20px 60px rgba(102, 126, 234, 0.3),
        0 0 0 1px rgba(102, 126, 234, 0.1) inset;
}

.case-content {
    padding: 25px;
}

.case-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.6;
    margin-top: 10px;
}

.case-stats {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.case-stat {
    text-align: center;
    flex: 1;
}

.case-stat .stat-value {
    display: block;
    font-size: 16px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.case-stat .stat-label {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .modal-content {
        max-width: 90%;
        max-height: 95vh;
        margin: 2.5vh auto;
        border-radius: 16px;
    }
    
    .modal-image {
        height: 200px;
    }
    
    .modal-stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .modal-header h2 {
        font-size: 22px;
    }
    
    .modal-body {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .modal-content {
        max-width: 95%;
        border-radius: 12px;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-close {
        top: 15px;
        right: 15px;
        width: 36px;
        height: 36px;
        font-size: 24px;
    }
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: #3498db;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    font-size: 14px;
}

.message-content {
    background: white;
    padding: 12px 16px;
    border-radius: 12px 12px 12px 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    max-width: 75%;
}

.user-message .message-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px 12px 4px 12px;
}

.message-content p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
}

.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 12px 16px;
    background: white;
    border-radius: 12px 12px 12px 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    width: fit-content;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #667eea;
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-10px); opacity: 1; }
}

.ai-quick-questions {
    padding: 15px 20px;
    background: white;
    border-top: 1px solid #e8e8e8;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.quick-question-btn {
    padding: 8px 16px;
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-question-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
}

.ai-chatbot-input {
    padding: 20px;
    background: white;
    border-top: 1px solid #e8e8e8;
    display: flex;
    gap: 10px;
}

.ai-chatbot-input input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #e8e8e8;
    border-radius: 25px;
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
}

.ai-chatbot-input input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.ai-send-btn {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
}

.ai-send-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.ai-send-btn svg {
    width: 18px;
    height: 18px;
    transform: translateX(1px);
}

/* AI客服响应式适配 */
@media (max-width: 768px) {
    .ai-chatbot-container {
        bottom: 20px;
        right: 20px;
    }
    
    .ai-chatbot-window {
        width: 90vw;
        max-width: 400px;
        height: 70vh;
        max-height: 600px;
        bottom: 70px;
        right: 0;
        border-radius: 16px;
    }
    
    .ai-chatbot-toggle {
        width: 56px;
        height: 56px;
    }
    
    .chatbot-icon {
        width: 28px;
        height: 28px;
    }
    
    .ai-quick-questions {
        padding: 12px 15px;
    }
    
    .quick-question-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
}

/* 新增模态框样式 */
.modal-body {
    padding: 40px;
    overflow-y: auto;
}

.modal-description {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
}

.modal-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.modal-stat {
    flex: 1;
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-radius: 12px;
}

.modal-stat .stat-value {
    display: block;
    font-size: 20px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-stat .stat-label {
    display: block;
    font-size: 13px;
    color: #888;
    margin-top: 5px;
}

.modal-section {
    margin-bottom: 30px;
}

.modal-section-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
    padding-left: 15px;
    border-left: 3px solid #667eea;
}

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

.modal-list li {
    padding: 10px 0;
    color: #555;
    font-size: 15px;
    border-bottom: 1px solid #eee;
    padding-left: 25px;
    position: relative;
}

.modal-list li:last-child {
    border-bottom: none;
}

.modal-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

@media (max-width: 480px) {
    .ai-chatbot-container {
        bottom: 15px;
        right: 15px;
        left: 15px;
    }
    
    .ai-chatbot-window {
        width: 100%;
        right: 0;
        left: 0;
        max-width: 100%;
        border-radius: 20px 20px 0 0;
        bottom: 0;
        height: 80vh;
    }
    
    .ai-chatbot-toggle {
        position: fixed;
        bottom: 15px;
        right: 15px;
    }
}