:root {
    /* 品牌主色 - 来自 logo 的蓝色 */
    --primary-color: #00a0e9;
    --primary-dark: #0077b3;
    --primary-light: #33b3ff;
    
    /* 品牌辅助色 - 来自 logo 的绿色 */
    --secondary-color: #76c043;
    --secondary-dark: #5a9933;
    --secondary-light: #8cd65c;
    
    /* 强调色 */
    --accent-color: #00d4aa;
    
    /* 文字颜色 */
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a68;
    --text-light: #6b7280;
    
    /* 背景颜色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    
    /* 边框和阴影 */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* 渐变效果 */
    --gradient-primary: linear-gradient(135deg, #00a0e9 0%, #76c043 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1a3a52 50%, #0f172a 100%);
    
    /* 动画和字体 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --container-max: 1200px;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

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

ul {
    list-style: none;
}

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-image {
    height: 180px;
    width: auto;
    object-fit: contain;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    position: relative;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: var(--header-height);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.hero-particles::before,
.hero-particles::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.3) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite;
}

.hero-particles::before {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.hero-particles::after {
    bottom: 20%;
    right: 10%;
    background: radial-gradient(circle, rgba(0, 168, 107, 0.3) 0%, transparent 70%);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-30px) scale(1.1);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 40px 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.title-line {
    display: block;
    background: linear-gradient(90deg, #ffffff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 15px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-desc {
    font-size: 1.1rem;
    opacity: 0.8;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s both;
}

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

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

.scroll-down {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    color: white;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 102, 204, 0.3);
}

.btn-outline {
    background: transparent;
    color: white;
    border-color: white;
}

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

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

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

.btn-outline-white {
    background: transparent;
    color: white;
    border-color: white;
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

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

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--gradient-primary);
    border-radius: 20px;
    font-size: 2rem;
    color: white;
    transition: transform var(--transition-normal);
}

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

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.about-preview {
    padding: 100px 0;
    background: white;
}

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

.about-content .section-title {
    text-align: left;
}

.about-content .section-title::after {
    left: 0;
    transform: none;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin: 40px 0;
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    padding: 40px;
}

.company-logo {
    max-width: 100%;
    max-height: 400px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.2rem;
}

.image-placeholder i {
    font-size: 4rem;
    margin-bottom: 15px;
    opacity: 0.8;
}

.services {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.1) 0%, rgba(0, 168, 107, 0.1) 100%);
    border-radius: 16px;
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.service-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-color);
    transition: gap var(--transition-normal);
}

.service-link:hover {
    gap: 12px;
}

.philosophy {
    padding: 100px 0;
    background: var(--gradient-hero);
    color: white;
    text-align: center;
}

.philosophy-content {
    max-width: 800px;
    margin: 0 auto;
}

.philosophy-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 30px;
    opacity: 0.9;
}

.philosophy-quote {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    display: inline-block;
}

.philosophy-quote::before,
.philosophy-quote::after {
    content: '"';
    position: absolute;
    font-size: 4rem;
    opacity: 0.3;
    font-family: Georgia, serif;
}

.philosophy-quote::before {
    top: -20px;
    left: -40px;
}

.philosophy-quote::after {
    bottom: -40px;
    right: -40px;
}

.philosophy-text {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.85;
}

.cta {
    padding: 80px 0;
    background: white;
}

.cta-content {
    text-align: center;
    padding: 60px;
    background: var(--gradient-primary);
    border-radius: 20px;
    color: white;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-text {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo-image {
    height: 180px;
    width: auto;
    object-fit: contain;
}

.footer-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

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

.footer-links ul li a {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-links ul li a:hover {
    color: var(--accent-color);
}

.footer-contact ul li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact ul li i {
    width: 20px;
    color: var(--accent-color);
}

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

.footer-bottom p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 5px;
}

.page-header {
    padding: 140px 0 80px;
    background: var(--gradient-hero);
    color: white;
    text-align: center;
}

.page-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.8;
}

.page-content {
    padding: 80px 0;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        order: -1;
    }
    
    .about-stats {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .philosophy-quote {
        font-size: 1.8rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-contact ul li {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .about-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .cta-content {
        padding: 40px 20px;
    }
    
    .cta-title {
        font-size: 1.6rem;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

.about-intro-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 25px;
}

.about-intro-content p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-intro-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-display-wrapper {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 500px;
}

.about-logo-image {
    max-width: 100%;
    height: auto;
    max-height: 300px;
    object-fit: contain;
}

.mission-vision {
    padding: 80px 0;
    background: var(--bg-secondary);
}

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

.mv-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.mv-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    margin: 0 auto 25px;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 1.8rem;
    color: white;
}

.mv-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.mv-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.qualifications {
    padding: 80px 0;
    background: white;
}

.qualifications-content {
    max-width: 1200px;
    margin: 0 auto;
}

.qualifications-intro {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.qualification-item {
    background: var(--bg-secondary);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.qualification-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 2rem;
    color: white;
}

.qualification-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.qualification-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.copyright-display {
    text-align: center;
    background: var(--bg-secondary);
    padding: 50px 40px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.copyright-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.copyright-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.copyright-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.copyright-item {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.copyright-image {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
}

.advantages {
    padding: 100px 0;
    background: white;
}

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

.advantage-item {
    display: flex;
    gap: 25px;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.advantage-item:hover {
    background: white;
    box-shadow: var(--shadow-lg);
}

.advantage-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.advantage-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.advantage-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.team {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.team-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.team-intro p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.team-feature {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 16px;
    transition: all var(--transition-normal);
}

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

.team-feature i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.team-feature h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.team-feature p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.partners {
    padding: 100px 0;
    background: white;
}

.partners-content {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.partners-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.partner-type {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    background: var(--bg-secondary);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.partner-type:hover {
    background: white;
    box-shadow: var(--shadow-lg);
}

.partner-type i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.partner-type span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.product-category {
    padding: 80px 0;
}

.product-category-alt {
    background: var(--bg-secondary);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 50px;
}

.category-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 20px;
    font-size: 2.5rem;
    color: white;
    flex-shrink: 0;
}

.category-info h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.category-info p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.product-image .image-placeholder {
    height: 200px;
    background: var(--gradient-primary);
}

.product-content {
    padding: 30px;
}

.product-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.product-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.product-features li i {
    color: var(--secondary-color);
}

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

.custom-service-item {
    text-align: center;
    padding: 40px 25px;
    background: var(--bg-secondary);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.custom-service-item:hover {
    background: white;
    box-shadow: var(--shadow-lg);
}

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

.custom-service-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.custom-service-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.tech-stack {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 15px;
    background: white;
    border-radius: 12px;
    transition: all var(--transition-normal);
}

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

.tech-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.tech-item span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
}

.cases-filter {
    padding: 40px 0;
    background: var(--bg-secondary);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 500;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.cases-list {
    padding: 60px 0;
}

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

.case-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.case-card.hidden {
    display: none;
}

.case-image {
    position: relative;
}

.case-image .image-placeholder {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-logo-image {
    max-width: 40%;
    max-height: 40%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(255, 255, 255, 0.3));
}

.case-logo-small {
    max-width: 35%;
    max-height: 35%;
}
.case-logo-middle {
    max-width: 50%;
    max-height: 50%;
}
.case-logo-large {
    max-width: 65%;
    max-height: 65%;
}

.case-logo-images {
    display: flex;
    gap: 15px;
    align-items: center;
    justify-content: center;
}

.case-overlay {
    position: absolute;
    top: 15px;
    left: 15px;
}

.case-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-color);
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.case-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.more-cases-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-color);
    font-style: italic;
    margin-top: 15px;
    margin-bottom: 0;
}

.case-results {
    display: flex;
    gap: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

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

.result-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-light);
}

.testimonials {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.testimonial-card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.testimonial-content {
    margin-bottom: 25px;
}

.testimonial-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-style: italic;
}

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

.author-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
}

.author-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.author-info span {
    font-size: 0.85rem;
    color: var(--text-light);
}

.contact-section {
    padding: 80px 0;
}

.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    width: 100%;
}

.contact-info h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.contact-info > p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.info-items {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 40px;
}

.info-item {
    display: flex;
    gap: 20px;
}

.info-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.info-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.info-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.social-links h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

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

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: var(--bg-secondary);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: all var(--transition-normal);
}

.social-icon:hover {
    background: var(--gradient-primary);
    color: white;
}

.faq-section {
    padding: 100px 0;
}

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

.faq-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-question i {
    color: var(--primary-color);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 25px 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 客户 Logo 展示 */
.clients {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.client-card {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 25px 20px;
    background: white;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.client-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 220px;
    height: 220px;
    background: transparent;
    border-radius: 16px;
    padding: 10px;
}

.client-logo img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.client-logo img.client-logo-small {
    max-width: 50%;
    max-height: 50%;
}

.client-logo img.client-logo-large {
    max-width: 120%;
    max-height: 120%;
}

/* 国家电网 Logo 特殊调整 */
.client-logo-state-grid {
    transform: translateY(-30px);
}

@media (max-width: 1024px) {
    .mv-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .clients-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
    
    .team-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-types {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .custom-services {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .about-intro {
        grid-template-columns: 1fr;
    }
    
    .category-header {
        flex-direction: column;
        text-align: center;
    }
    
    .custom-services {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .team-features {
        grid-template-columns: 1fr;
    }
    
    .partners-types {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .case-results {
        flex-direction: column;
        gap: 15px;
    }
}