/* ============================================
   江苏元启网络信息技术有限公司官网样式文件
   版本: 1.0
   ============================================ */

/* --------------------------
   动画关键帧
   -------------------------- */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* --------------------------
   图片加载优化样式
   -------------------------- */

/* 图片容器 */
.img-container {
    position: relative;
    overflow: hidden;
    background: transparent;
    width: 100%;
}

/* 懒加载图片占位符 */
.img-placeholder {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    transition: background 0.3s ease-out;
    width: 100%;
}

/* 保持宽高比的容器 */
.img-aspect-ratio {
    position: relative;
    width: 100%;
    background: transparent;
}

.img-aspect-ratio::before {
    content: '';
    display: block;
    padding-bottom: 100%; /* 默认正方形 */
}

.img-aspect-ratio img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    animation: shimmer 2s infinite;
    transition: opacity 0.3s ease-out;
}

.img-placeholder.loaded {
    background: transparent;
}

.img-placeholder.loaded::before {
    opacity: 0;
    animation: none;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 懒加载图片样式 */
.lazy-image {
    opacity: 0.3;
    transition: all 0.6s ease-out;
}

.lazy-image.loaded {
    opacity: 1;
}

/* 加载图标 */
.loading-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid #4299e1;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* --------------------------
   1. 全局样式
   -------------------------- */

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

/* --------------------------
   滚动动画
   -------------------------- */

.section-title,
.service-card,
.value-item,
.stat-item,
.intro-text,
.intro-image,
.timeline-item,
.timeline-content,
.business-card,
.case-card,
.honor-card,
.client-category,
.contact-services,
.contact-details,
.about-text {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.section-title.animate-in,
.service-card.animate-in,
.value-item.animate-in,
.stat-item.animate-in,
.intro-text.animate-in,
.intro-image.animate-in,
.timeline-item.animate-in,
.timeline-content.animate-in,
.business-card.animate-in,
.case-card.animate-in,
.honor-card.animate-in,
.client-category.animate-in,
.contact-services.animate-in,
.contact-details.animate-in,
.about-text.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.service-card:nth-child(2).animate-in {
    transition-delay: 0.1s;
}

.service-card:nth-child(3).animate-in {
    transition-delay: 0.2s;
}

.service-card:nth-child(4).animate-in {
    transition-delay: 0.3s;
}

.value-item:nth-child(2).animate-in {
    transition-delay: 0.1s;
}

.value-item:nth-child(3).animate-in {
    transition-delay: 0.2s;
}

.value-item:nth-child(4).animate-in {
    transition-delay: 0.3s;
}

.stat-item:nth-child(2).animate-in {
    transition-delay: 0.15s;
}

.stat-item:nth-child(3).animate-in {
    transition-delay: 0.3s;
}

.stat-item:nth-child(4).animate-in {
    transition-delay: 0.45s;
}

.intro-image.animate-in {
    transition-delay: 0.2s;
}

.business-card:nth-child(2).animate-in {
    transition-delay: 0.15s;
}

.business-card:nth-child(3).animate-in {
    transition-delay: 0.3s;
}

.business-card:nth-child(4).animate-in {
    transition-delay: 0.45s;
}

.case-card:nth-child(2).animate-in {
    transition-delay: 0.1s;
}

.case-card:nth-child(3).animate-in {
    transition-delay: 0.2s;
}

.case-card:nth-child(4).animate-in {
    transition-delay: 0.3s;
}

.case-card:nth-child(5).animate-in {
    transition-delay: 0.4s;
}

.case-card:nth-child(6).animate-in {
    transition-delay: 0.5s;
}

.case-card:nth-child(7).animate-in {
    transition-delay: 0.6s;
}

.case-card:nth-child(8).animate-in {
    transition-delay: 0.7s;
}

.case-card:nth-child(9).animate-in {
    transition-delay: 0.8s;
}

.honor-card:nth-child(2).animate-in {
    transition-delay: 0.1s;
}

.honor-card:nth-child(3).animate-in {
    transition-delay: 0.2s;
}

.honor-card:nth-child(4).animate-in {
    transition-delay: 0.3s;
}

.honor-card:nth-child(5).animate-in {
    transition-delay: 0.4s;
}

.honor-card:nth-child(6).animate-in {
    transition-delay: 0.5s;
}

.honor-card:nth-child(7).animate-in {
    transition-delay: 0.6s;
}

.honor-card:nth-child(8).animate-in {
    transition-delay: 0.7s;
}

.honor-card:nth-child(9).animate-in {
    transition-delay: 0.8s;
}

.client-category:nth-child(2).animate-in {
    transition-delay: 0.15s;
}

.client-category:nth-child(3).animate-in {
    transition-delay: 0.3s;
}

/* --------------------------
   2. 布局基础
   -------------------------- */

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

.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 32px;
    color: #1a365d;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #2196f3, #64b5f6);
}

.section-title p {
    color: #666;
    font-size: 14px;
}

/* --------------------------
   3. Header 导航组件
   -------------------------- */

header {
    background: linear-gradient(135deg, #2c5282 0%, #4299e1 50%, #63b3ed 100%);
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    color: #fff;
    text-decoration: none;
}

.logo-text {
    font-size: 16px;
    font-weight: bold;
    letter-spacing: 2px;
}

.menu-toggle {
    display: none;
    font-size: 24px;
    color: #fff;
    cursor: pointer;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
    position: relative;
}

.nav-links a:hover {
    color: #fff;
    font-weight: 600;
}

.nav-links a.active {
    color: #e7eef5;
    font-weight: 600;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #64b5f6;
    transition: width 0.3s;
}

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

/* --------------------------
   4. 首页组件
   -------------------------- */

/* Banner */
.banner {
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 30%, #4299e1 60%, #63b3ed 100%);
    color: #fff;
    padding: 180px 0 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

#bannerCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.banner-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(66, 153, 225, 0.15) 0%, transparent 50%);
    animation: glowPulse 8s ease-in-out infinite;
    z-index: 2;
}

@keyframes glowPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.banner-orbs {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 2;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.4;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    top: 10%;
    left: -10%;
    animation: orbFloat1 12s ease-in-out infinite;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    bottom: 10%;
    right: -5%;
    animation: orbFloat2 10s ease-in-out infinite;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: orbFloat3 8s ease-in-out infinite;
}

@keyframes orbFloat1 {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(80px, 40px);
    }
}

@keyframes orbFloat2 {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-60px, -30px);
    }
}

@keyframes orbFloat3 {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
    }
}

.banner-content {
    position: relative;
    z-index: 10;
}

.banner h1 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: 300;
    letter-spacing: 6px;
    animation: fadeInUp 1s ease-out;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.banner p {
    font-size: 24px;
    color: #90caf9;
    letter-spacing: 8px;
    animation: fadeInUp 1s ease-out 0.3s both;
    margin-bottom: 40px;
}

.banner-buttons {
    animation: fadeInUp 1s ease-out 0.6s both;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    margin: 0 10px;
}

.btn-primary {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: #fff;
    box-shadow: 0 4px 20px rgba(79, 172, 254, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(79, 172, 254, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
}

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

/* 公司简介 */
.intro {
    background: #fff;
}

.intro-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.intro-text {
    flex: 1;
}

.intro-text h3 {
    font-size: 24px;
    color: #1a365d;
    margin-bottom: 20px;
}

.intro-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.intro-image {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    max-height: 350px;
}

.intro-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 核心业务 */
.services {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(33, 150, 243, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(66, 153, 225, 0.05) 0%, transparent 50%);
}

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

.service-card {
    background: #fff;
    padding: 45px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid #e2e8f0;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2196f3, #64b5f6);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.service-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 0 25px 50px rgba(33, 150, 243, 0.15);
    border-color: #2196f3;
}

.service-card .icon-wrapper {
    width: 100px;
    height: 100px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, rgba(100, 181, 246, 0.1) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.4s ease;
}

.service-card:hover .icon-wrapper {
    background: linear-gradient(135deg, #2196f3 0%, #64b5f6 100%);
    transform: scale(1.1);
}

.service-card i {
    font-size: 48px;
    color: #2196f3;
    transition: all 0.4s ease;
}

.service-card:hover i {
    color: #fff;
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 20px;
    color: #1a365d;
    margin-bottom: 18px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.service-card:hover h3 {
    color: #2196f3;
}

.service-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
    transition: color 0.3s ease;
}

/* 数据统计 */
.stats {
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #4299e1 100%);
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 60px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: 30px 0;
}

.stat-number {
    font-size: 56px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.stat-number::after {
    content: '+';
    font-size: 32px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.5);
    margin-left: 5px;
}

.stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 2px;
}

/* 核心价值观 */
.values {
    background: #fff;
    position: relative;
    overflow: hidden;
}

.values::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(33, 150, 243, 0.03) 0%, transparent 70%);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.value-item {
    padding: 40px 30px;
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    transition: all 0.4s ease;
    position: relative;
}

.value-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(33, 150, 243, 0.1);
    border-color: #2196f3;
}

.value-item .icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, #2196f3, #64b5f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: #fff;
    transition: all 0.4s ease;
    position: relative;
}

.value-item .icon::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: linear-gradient(135deg, #2196f3, #64b5f6);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.4s ease;
    filter: blur(20px);
}

.value-item:hover .icon {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(33, 150, 243, 0.5);
}

.value-item:hover .icon::before {
    opacity: 0.5;
}

.value-item h3 {
    font-size: 20px;
    color: #1a365d;
    margin-bottom: 15px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.value-item:hover h3 {
    color: #2196f3;
}

.value-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
}

/* --------------------------
   5. 通用页面组件
   -------------------------- */

/* 页面Hero区域 */
.about-hero {
    background: linear-gradient(135deg, #1a365d 0%, #2c5282 30%, #4299e1 60%, #63b3ed 100%);
    color: #fff;
    padding: 180px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 50vh;
    display: flex;
    align-items: center;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.about-hero-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(66, 153, 225, 0.2) 0%, transparent 50%);
    animation: glowPulse 8s ease-in-out infinite;
    z-index: 1;
}

.about-hero .container {
    position: relative;
    z-index: 2;
}

.about-hero h1 {
    font-size: 44px;
    margin-bottom: 20px;
    font-weight: 300;
    letter-spacing: 4px;
    animation: fadeInUp 0.8s ease-out;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.about-hero p {
    color: #90caf9;
    font-size: 18px;
    letter-spacing: 2px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* 关于我们页面 */
.about-content {
    background: #fff;
}

.about-text {
    max-width: 900px;
    margin: 0 auto;
    color: #555;
    line-height: 1.9;
    font-size: 15px;
}

.about-text p {
    margin-bottom: 20px;
}

/* 时间线 */
.timeline {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 50%, rgba(33, 150, 243, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 90% 50%, rgba(100, 181, 246, 0.03) 0%, transparent 50%);
}

.timeline-list {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, #2196f3, #64b5f6);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.timeline-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 18px;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #2196f3, #64b5f6);
    border-radius: 50%;
    transform: translateX(-50%);
    border: 4px solid #fff;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.2);
    transition: all 0.3s ease;
    z-index: 2;
}

.timeline-item:hover::after {
    transform: translateX(-50%) scale(1.2);
    box-shadow: 0 0 0 8px rgba(33, 150, 243, 0.2);
}

.timeline-item.left {
    padding-right: calc(50% + 50px);
    text-align: right;
}

.timeline-item.right {
    padding-left: calc(50% + 50px);
}

.timeline-content {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    padding: 28px 35px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2196f3, #64b5f6);
    border-radius: 3px 3px 0 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(33, 150, 243, 0.12);
}

.timeline-content:hover::before {
    opacity: 1;
}

.timeline-content h4 {
    font-size: 19px;
    color: #1a365d;
    margin-bottom: 12px;
    font-weight: 600;
}

.timeline-content p {
    color: #666;
    font-size: 15px;
}

/* 合作伙伴 */
.partners {
    background: #fff;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 40px;
}

.partner-item {
    background: #f8fafc;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.partner-item:hover {
    transform: scale(1.05);
}

.partner-item img {
    max-height: 60px;
    filter: grayscale(1);
    opacity: 0.7;
    transition: all 0.3s;
}

.partner-item:hover img {
    filter: grayscale(0);
    opacity: 1;
}

/* 业务范围 */
.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.business-card {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    padding: 45px;
    border-radius: 16px;
    border-left: 5px solid #2196f3;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.03) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.business-card:hover {
    transform: translateY(-8px) translateX(5px);
    box-shadow: 0 20px 40px rgba(33, 150, 243, 0.15);
    border-left-color: #64b5f6;
}

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

.business-card h3 {
    font-size: 20px;
    color: #1a365d;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.business-card h3 i {
    margin-right: 15px;
    color: #2196f3;
    font-size: 28px;
    transition: all 0.4s ease;
}

.business-card:hover h3 i {
    transform: scale(1.2);
    color: #64b5f6;
}

.business-card ul {
    list-style: none;
    position: relative;
    z-index: 1;
}

.business-card ul li {
    padding: 12px 0;
    color: #555;
    font-size: 15px;
    border-bottom: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.business-card ul li:last-child {
    border-bottom: none;
}

.business-card ul li::before {
    content: '✓';
    color: #4caf50;
    margin-right: 12px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.business-card ul li:hover {
    color: #2196f3;
    padding-left: 10px;
}

/* 资质荣誉 */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    align-items: center;
    justify-items: center;
}

.honor-card {
    width: 100%;
    max-width: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.honor-card .icon {
    width: 100%;
    max-width: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}



.honor-card {
    background: transparent;
    padding: 0;
    border-radius: 8px;
    text-align: center;
    transition: all 0.4s ease;
}

.honor-card:hover {
    transform: translateY(-5px);
}

.honor-card .icon {
    display: inline-block;
    margin: 0;
    padding: 0;
    background: transparent;
    border-radius: 8px;
    transition: all 0.4s ease;
}

.honor-card .icon img {
    width: 100%;
    max-width: 280px;
    height: auto;
    cursor: zoom-in;
    border-radius: 8px;
    transition: all 0.4s ease;
}

.honor-card:hover .icon img {
    box-shadow: 0 0 20px rgba(33, 150, 243, 0.3);
}

.honor-card h3 {
    display: none;
}

.honor-card p {
    display: none;
}

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

.case-card {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 1;
    pointer-events: none;
}

.case-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 25px 50px rgba(33, 150, 243, 0.15);
}

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

.case-card .img-container {
    width: 100%;
    height: 200px;
}

.case-card .img-placeholder {
    width: 100%;
    height: 200px;
    background: #f5f7fa;
}

.case-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.case-card .lazy-image {
    opacity: 0;
    transition: opacity 0.6s ease-out;
}

.case-card .lazy-image.loaded {
    opacity: 1;
}

.img-container.img-error .lazy-image {
    display: none;
}

.img-title-placeholder {
    display: none;
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    justify-content: center;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
    word-break: break-word;
    line-height: 1.4;
}

.img-container.img-error .img-title-placeholder {
    display: flex;
}

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

.case-card .case-content {
    padding: 28px;
    position: relative;
    z-index: 2;
}

.case-card h3 {
    font-size: 17px;
    color: #1a365d;
    margin-bottom: 12px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.case-card:hover h3 {
    color: #2196f3;
}

.case-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 典型客户 */
.clients-section {
    background: #fff;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.client-category {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    padding: 35px;
    border-radius: 16px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.client-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2196f3, #64b5f6);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.client-category:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(33, 150, 243, 0.12);
}

.client-category:hover::before {
    transform: scaleX(1);
}

.client-category h3 {
    font-size: 19px;
    color: #1a365d;
    margin-bottom: 25px;
    padding-bottom: 18px;
    border-bottom: 2px solid #2196f3;
    font-weight: 600;
    transition: color 0.3s ease;
}

.client-category:hover h3 {
    color: #2196f3;
}

.client-category ul {
    list-style: none;
}

.client-category ul li {
    padding: 12px 0;
    color: #555;
    font-size: 15px;
    border-bottom: 1px dashed #e0e0e0;
    transition: all 0.3s ease;
}

.client-category ul li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.client-category ul li:hover {
    color: #2196f3;
    padding-left: 8px;
}

.client-category ul li.more {
    color: #999;
    font-size: 16px;
    font-weight: bold;
}

/* 联系我们 */
.contact-content {
    background: #fff;
}

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

.contact-services {
    padding: 45px;
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.contact-services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4caf50, #81c784);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.contact-services:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(76, 175, 80, 0.1);
}

.contact-services:hover::before {
    transform: scaleX(1);
}

.contact-services h3 {
    font-size: 22px;
    color: #1a365d;
    margin-bottom: 35px;
    font-weight: 600;
}

.service-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 28px;
    transition: all 0.3s ease;
}

.service-item:hover {
    transform: translateX(5px);
}

.service-item:last-child {
    margin-bottom: 0;
}

.service-item i {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #4caf50, #81c784);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    margin-right: 18px;
    flex-shrink: 0;
    font-size: 20px;
    transition: all 0.3s ease;
}

.service-item:hover i {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(76, 175, 80, 0.4);
}

.service-item .text h4 {
    font-size: 16px;
    color: #1a365d;
    margin-bottom: 6px;
    font-weight: 600;
}

.service-item .text p {
    color: #666;
    font-size: 14px;
}

.contact-details {
    padding: 45px;
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.contact-details::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2196f3, #64b5f6);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.contact-details:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(33, 150, 243, 0.1);
}

.contact-details:hover::before {
    transform: scaleX(1);
}

.contact-details h3 {
    font-size: 22px;
    color: #1a365d;
    margin-bottom: 35px;
    font-weight: 600;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 28px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(5px);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item i {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #2196f3, #64b5f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    margin-right: 18px;
    flex-shrink: 0;
    font-size: 20px;
    transition: all 0.3s ease;
}

.contact-item:hover i {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(33, 150, 243, 0.4);
}

.contact-item .text h4 {
    font-size: 16px;
    color: #1a365d;
    margin-bottom: 6px;
    font-weight: 600;
}

.contact-item .text p {
    color: #666;
    font-size: 14px;
}

/* --------------------------
   6. Footer 组件
   -------------------------- */

footer {
    background: #2c5282;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-section h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #90caf9;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #e2e8f0;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #64b5f6;
}

.footer-section p {
    color: #e2e8f0;
    font-size: 14px;
    line-height: 1.8;
}

.footer-bottom {
    border-top: 1px solid #4a6fa5;
    padding-top: 30px;
    text-align: center;
    color: #e2e8f0;
    font-size: 14px;
}

/* --------------------------
   7. 响应式设计
   -------------------------- */

@media (max-width: 1200px) {
    .container {
        width: 95%;
    }
}

@media (max-width: 768px) {
    /* Header */
    header {
        padding: 10px 0;
    }

    .menu-toggle {
        display: block;
        margin-left: auto;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, #2c5282 0%, #4299e1 100%);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 10px 0;
        text-align: center;
    }

    .nav-links li:first-child {
        margin-top: 0;
    }

    .nav-links a {
        font-size: 16px;
        padding: 10px 20px;
        display: inline-block;
        position: relative;
    }
    
    .nav-links a::after {
        left: 50%;
        transform: translateX(-50%);
        max-width: 60px;
    }

    /* Banner */
    .banner h1 {
        font-size: 28px;
        margin-bottom: 15px;
    }

    .banner p {
        font-size: 16px;
    }

    .logo-text {
        font-size: 14px;
        letter-spacing: 1px;
    }

    /* 网格布局 */
    .services-grid,
    .values-grid,
    .business-grid,
    .honor-grid,
    .cases-grid,
    .clients-grid {
        grid-template-columns: 1fr;
    }

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

    /* 公司简介 */
    .intro-content {
        flex-direction: column;
        gap: 30px;
    }

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

    .intro-text p {
        font-size: 14px;
    }

    /* 服务卡片 */
    .service-card {
        padding: 30px 20px;
    }

    .service-card i {
        font-size: 36px;
    }

    .service-card h3 {
        font-size: 16px;
    }

    .service-card p {
        font-size: 13px;
    }

    /* 价值观 */
    .value-item .icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }

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

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

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-section h4 {
        margin-bottom: 15px;
    }

    .footer-section p {
        font-size: 13px;
    }

    .footer-section ul li a {
        font-size: 13px;
    }

    /* 联系我们 */
    .contact-info {
        grid-template-columns: 1fr;
    }

    .contact-details,
    .contact-services {
        padding: 25px;
    }

    .contact-details h3,
    .contact-services h3 {
        font-size: 18px;
    }

    .contact-item,
    .service-item {
        margin-bottom: 20px;
    }

    /* 时间线 */
    .timeline-list::before {
        left: 20px;
    }

    .timeline-item::after {
        left: 20px;
        transform: none;
    }

    .timeline-item.left,
    .timeline-item.right {
        padding-left: 60px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-content h4 {
        font-size: 16px;
    }

    .timeline-content p {
        font-size: 13px;
    }

    /* 业务卡片 */
    .business-card {
        padding: 25px;
    }

    .business-card h3 {
        font-size: 18px;
    }

    .business-card ul li {
        font-size: 13px;
        padding: 8px 0;
    }

    /* 荣誉卡片 */
    .honor-card {
        padding: 15px;
        max-width: 100%;
    }

    .honor-card .icon {
        width: 100%;
        max-width: 300px;
        height: auto;
        margin: 0 auto;
    }

    .honor-card .icon img {
        width: 100%;
        height: auto;
        max-width: 100%;
        object-fit: contain;
    }

    /* 项目卡片 */
    .case-card .case-content {
        padding: 20px;
    }

    .case-card h3 {
        font-size: 15px;
    }

    .case-card p {
        font-size: 12px;
    }

    /* 客户分类 */
    .client-category {
        padding: 25px;
    }

    .client-category h3 {
        font-size: 16px;
    }

    .client-category ul li {
        font-size: 13px;
        padding: 8px 0;
    }

    /* 标题 */
    .section-title h2 {
        font-size: 24px;
    }

    .section-title p {
        font-size: 13px;
    }

    .about-hero h1 {
        font-size: 28px;
    }

    .about-hero p {
        font-size: 14px;
    }

    .about-text p {
        font-size: 14px;
    }
}