/**
 * 凌云科技门户网站 - 全局CSS变量定义
 *
 * @description 定义网站使用的全局CSS变量，包括颜色、阴影、过渡效果等
 * @author 开发团队
 * @version 1.0.0
 * @since 2025年8月12日
 */

:root {
    /* 主色调 - 蓝色系 */
    --primary-blue: #1976d2;      /* 主要蓝色 */
    --dark-blue: #0d47a1;         /* 深蓝色 */
    --light-blue: #e3f2fd;        /* 浅蓝色 */
    --accent-blue: #2196f3;       /* 强调蓝色 */

    /* 辅助色彩 */
    --success-green: #4caf50;     /* 成功绿色 */
    --white: #ffffff;             /* 纯白色 */

    /* 灰度色彩 */
    --light-gray: #f8f9fa;        /* 浅灰色 */
    --medium-gray: #e8eaed;       /* 中灰色 */
    --text-dark: #1a1a1a;         /* 深色文字 */
    --text-medium: #424242;       /* 中等文字 */
    --text-light: #757575;        /* 浅色文字 */

    /* 阴影效果 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);      /* 小阴影 */
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);     /* 中阴影 */
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);    /* 大阴影 */

    /* 过渡效果 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);  /* 标准过渡 */
    --border-radius: 12px;        /* 标准圆角 */

    /* 渐变背景 */
    --gradient-primary: linear-gradient(135deg, #1976d2, #0d47a1);      /* 主渐变 */
    --gradient-secondary: linear-gradient(135deg, #2196f3, #1976d2);     /* 次渐变 */
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', 'Segoe UI', Roboto, sans-serif;
    background-color: var(--light-gray);
    color: var(--text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
}

body.loaded {
    opacity: 1;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 头部样式 */
header {
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
    overflow: visible; /* 允许绝对定位的logo溢出而不撑高header */
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    width: 200px;
    height: 200px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: bold;
    font-size: 24px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

/* 图片logo适配：完整显示，限制在容器内，不遮挡文字 */
.logo.has-image { background: transparent; border-radius: 0; box-shadow: none; overflow: hidden; }
.logo.has-image img { display: block; width: 100%; height: 100%; object-fit: contain; }

.logo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.2) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.logo:hover::before {
    transform: translateX(100%);
}

.logo-text h1 {
    font-size: 24px;
    color: var(--dark-blue);
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
}

.logo-text p {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 400;
    margin: 0;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

/* nav ul .nav-cta { margin-left: 40px; } */
nav ul .nav-cta a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px;
    /*border: 2px solid var(--primary-blue); color: var(--primary-blue);border-radius: 24px;*/
    font-weight: 700; }
/*nav ul .nav-cta a:hover { background: var(--primary-blue); color: #fff; }*/

nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 16px;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

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

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-blue);
    border-radius: 3px;
    transition: var(--transition);
}

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

nav a.active {
    color: var(--primary-blue);
    font-weight: 600;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-dark);
}

/* 英雄区域 */
.hero {
    position: relative;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 120px 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

/* 轮播图样式 */
.hero-carousel {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    display: flex;
    align-items: center;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
}

/* 为banner原图添加文字遮罩 */
.carousel-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
        rgba(0, 0, 0, 0.4) 0%,
        rgba(0, 0, 0, 0.2) 50%,
        rgba(0, 0, 0, 0.6) 100%);
    z-index: 1;
}

.carousel-content {
    position: relative;
    z-index: 2;
    width: 100%;
    color: var(--white);
}

.carousel-text {
    max-width: 600px;
    text-align: left;
}

.carousel-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8),
                 0 0 20px rgba(0, 0, 0, 0.6);
    color: #ffffff;
}

.carousel-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
    line-height: 1.6;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.8),
                 0 0 15px rgba(0, 0, 0, 0.6);
    color: #ffffff;
    font-weight: 500;
}

.carousel-cta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* 轮播控制按钮 */
.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.carousel-control:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.carousel-control.prev {
    left: 30px;
}

.carousel-control.next {
    right: 30px;
}

/* 轮播指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

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

/* 轮播图响应式设计 */
@media (max-width: 768px) {
    .hero-carousel {
        height: 80vh;
        min-height: 500px;
    }

    .carousel-title {
        font-size: 2.5rem;
        text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.9),
                     0 0 15px rgba(0, 0, 0, 0.7);
    }

    .carousel-subtitle {
        font-size: 1.1rem;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.9),
                     0 0 10px rgba(0, 0, 0, 0.7);
    }

    .carousel-cta {
        flex-direction: column;
        align-items: flex-start;
    }

    .carousel-cta .btn {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    .carousel-control {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .carousel-control.prev {
        left: 20px;
    }

    .carousel-control.next {
        right: 20px;
    }

    .carousel-indicators {
        bottom: 20px;
    }

    /* 移动端增强文字遮罩 */
    .carousel-background::before {
        background: linear-gradient(135deg,
            rgba(0, 0, 0, 0.5) 0%,
            rgba(0, 0, 0, 0.3) 50%,
            rgba(0, 0, 0, 0.7) 100%);
    }
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 1px, transparent 1px),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 1px, transparent 1px),
        radial-gradient(circle at 40% 40%, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 50px 50px, 30px 30px, 70px 70px;
    animation: float 20s ease-in-out infinite;
}

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

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-text {
    text-align: left;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-highlight {
    background: linear-gradient(45deg, #fff, #e3f2fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

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

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.hero-icon {
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: #fff;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

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

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

.hero-cta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-image-container {
    position: relative;
    width: 300px;
    height: 300px;
}

.hero-main-image {
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: #fff;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: pulse 2s ease-in-out infinite;
    margin: 0 auto;
}

.hero-floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.floating-element {
    position: absolute;
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #fff;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
}

.floating-element:nth-child(1) {
    top: 20px;
    right: 20px;
    animation-delay: 0s;
}

.floating-element:nth-child(2) {
    bottom: 20px;
    left: 20px;
    animation-delay: 2s;
}

.floating-element:nth-child(3) {
    top: 50%;
    right: 0;
    animation-delay: 4s;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
    white-space: nowrap;
}

.btn i {
    margin-right: 8px;
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-blue);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.7);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    border-color: var(--white);
}

.btn-glow {
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(255, 255, 255, 0.3); }
    to { box-shadow: 0 0 30px rgba(255, 255, 255, 0.5); }
}

.btn-outline {
    border: 2px solid rgba(255, 255, 255, 0.7);
    background: transparent;
    position: relative;
    overflow: hidden;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-outline:hover::before {
    left: 100%;
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
    border-radius: 50px;
}

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

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

/* 特色内容区域 */
.features {
    padding: 100px 0;
    background-color: var(--white);
}

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

.section-title h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    font-weight: 700;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background-color: var(--primary-blue);
    border-radius: 2px;
}

.section-title p {
    color: var(--text-medium);
    max-width: 700px;
    margin: 30px auto 0;
    font-size: 1.1rem;
}

/* 新的section-header样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    font-weight: 700;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background-color: var(--primary-blue);
    border-radius: 2px;
}

.section-header p {
    color: var(--text-medium);
    max-width: 700px;
    margin: 30px auto 0;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--medium-gray);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }

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

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--primary-blue);
    font-size: 32px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background-color: var(--primary-blue);
    color: var(--white);
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-medium);
    margin-bottom: 25px;
    font-size: 1.05rem;
    flex-grow: 1;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 15px 0 25px;
    justify-content: center;
}

.tag {
    background: var(--light-blue);
    color: var(--primary-blue);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.feature-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    position: relative;
    padding-bottom: 2px;
    margin-top: auto;
    justify-content: center;
}

.feature-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-blue);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.feature-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.feature-link i {
    margin-left: 8px;
    transition: transform 0.3s;
}

.feature-link:hover i {
    transform: translateX(5px);
}

/* 产品展示 */
.products {
    padding: 100px 0;
    background-color: var(--light-gray);
}

/* 特色产品展示 */
.featured-products {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.product-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.category-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--medium-gray);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.category-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--white);
    font-size: 2.5rem;
    transition: var(--transition);
}

.category-card:hover .category-icon {
    transform: scale(1.1);
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 600;
}

.category-card p {
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 1.6;
}

.category-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 25px;
    justify-content: center;
}

.feature-badge {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(25, 118, 210, 0.2);
}

.category-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.category-link:hover {
    color: var(--dark-blue);
}

.category-link i {
    margin-left: 8px;
    transition: var(--transition);
}

.category-link:hover i {
    transform: translateX(5px);
}

.product-highlights {
    margin-top: 60px;
}

.highlight-item {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 50px;
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: center;
    border: 1px solid var(--medium-gray);
}

.highlight-image {
    width: 150px;
    height: 150px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 4rem;
    margin: 0 auto;
}

.highlight-content h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-dark);
    font-weight: 600;
}

.highlight-content p {
    color: var(--text-medium);
    margin-bottom: 30px;
    line-height: 1.6;
    font-size: 1.1rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/**
 * 产品卡片样式
 *
 * @description 产品展示卡片的基础样式，包含悬停效果和动画
 * @features
 *   - 响应式布局
 *   - 悬停动画效果
 *   - 淡入动画
 *   - 阴影和过渡效果
 */
.product-card {
    background: var(--white);          /* 白色背景 */
    border-radius: var(--border-radius); /* 圆角边框 */
    padding: 24px;                     /* 内边距 */
    box-shadow: var(--shadow-sm);      /* 小阴影 */
    transition: var(--transition);      /* 过渡动画 */
    cursor: pointer;                    /* 手型光标 */
    position: relative;                 /* 相对定位 */
    overflow: hidden;                   /* 隐藏溢出内容 */
    display: flex;                      /* 弹性布局 */
    flex-direction: column;             /* 垂直排列 */
    align-items: center;                /* 水平居中 */
    text-align: center;                 /* 文字居中 */
    opacity: 0;                         /* 初始透明 */
    animation: fadeInUp 0.6s ease forwards; /* 淡入动画 */
}

.product-card:nth-child(1) { animation-delay: 0.1s; }
.product-card:nth-child(2) { animation-delay: 0.2s; }
.product-card:nth-child(3) { animation-delay: 0.3s; }
.product-card:nth-child(4) { animation-delay: 0.4s; }
.product-card:nth-child(5) { animation-delay: 0.5s; }
.product-card:nth-child(6) { animation-delay: 0.6s; }
.product-card:nth-child(7) { animation-delay: 0.7s; }
.product-card:nth-child(8) { animation-delay: 0.8s; }
.product-card:nth-child(9) { animation-delay: 0.9s; }
.product-card:nth-child(10) { animation-delay: 1.0s; }
.product-card:nth-child(11) { animation-delay: 1.1s; }
.product-card:nth-child(12) { animation-delay: 1.2s; }

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-card:active {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-blue));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

/**
 * 淡入上升动画
 *
 * @description 元素从下方淡入并向上移动的动画效果
 * @param {string} from - 动画起始状态：透明且向下偏移30px
 * @param {string} to - 动画结束状态：完全不透明且回到原位
 * @example
 *   .element {
 *     animation: fadeInUp 0.6s ease forwards;
 *   }
 */
@keyframes fadeInUp {
    from {
        opacity: 0;                    /* 完全透明 */
        transform: translateY(30px);   /* 向下偏移30px */
    }
    to {
        opacity: 1;                    /* 完全不透明 */
        transform: translateY(0);      /* 回到原位 */
    }
}

.product-image {
    width: 120px;
    height: 120px;
    background: linear-gradient(45deg, #1e3c72, #2a5298);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 3rem;
    position: relative;
    overflow: hidden;
    text-align: center;
    margin: 0 auto 20px auto;
    padding: 0;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0,0,0,0.1), transparent);
}

.product-content {
    padding: 0;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background: transparent;
    border-radius: 0;
    width: 100%;
    text-align: center;
}

.product-content h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 600;
    text-align: center;
}

.product-content p {
    color: var(--text-medium);
    margin-bottom: 20px;
    flex-grow: 1;
    text-align: center;
}

.product-content .btn {
    align-self: center;
    margin-top: auto;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    justify-content: center;
}

.feature-tag {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(25, 118, 210, 0.2);
}

/* 服务区域 */
.services {
    padding: 100px 0;
    background-color: var(--white);
}

/* 服务优势展示 */
.services-showcase {
    padding: 100px 0;
    background-color: var(--white);
}

.services-showcase .services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-item {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--medium-gray);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.service-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

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

.service-item:hover .service-icon {
    transform: scale(1.1);
}

.service-item h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 600;
}

.service-item p {
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-benefits {
    list-style: none;
    margin-bottom: 25px;
    text-align: left;
}

.service-benefits li {
    color: var(--text-medium);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.service-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-green);
    font-weight: bold;
}

.service-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.service-link:hover {
    color: var(--dark-blue);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 35px 30px;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }

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

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    color: var(--text-dark);
    font-weight: 600;
}

.service-card h3 i {
    margin-right: 15px;
    color: var(--primary-blue);
    font-size: 1.8rem;
    width: 40px;
}

.service-card p {
    color: var(--text-medium);
    margin-bottom: 25px;
    flex-grow: 1;
}

.service-card .btn {
    align-self: flex-start;
}

.service-features {
    margin-bottom: 25px;
}

.service-feature {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    color: var(--text-medium);
}

.service-feature i {
    color: var(--primary-blue);
    margin-right: 10px;
    font-size: 0.9rem;
}

.service-feature span {
    font-size: 0.95rem;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background-color: var(--light-gray);
}

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

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 25px;
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.3;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-medium);
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.stat-box {
    text-align: center;
    padding: 25px 20px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.stat-box h4 {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 5px;
    font-weight: 700;
}

.stat-box p {
    font-size: 1rem;
    color: var(--text-medium);
    margin: 0;
}

.organization-structure {
    margin-top: 50px;
}

.organization-structure h4 {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: var(--text-dark);
    font-weight: 600;
}

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

.org-item {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--medium-gray);
}

.org-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-blue);
}

.org-item i {
    color: var(--primary-blue);
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.org-item h5 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 600;
}

.org-item p {
    font-size: 0.9rem;
    color: var(--text-medium);
    margin: 0;
}

.about-image {
    height: 450px;
    background: linear-gradient(45deg, #1a73e8, #0d47a1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.about-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxwYXR0ZXJuIGlkPSJwYXR0ZXJuIiB3aWR0aD0iMTAwIiBoZWlnaHQ9IjEwMCIgcGF0dGVyblVuaXRzPSJ1c2VyU3BhY2VPblVzZSIgcGF0dGVyblRyYW5zZm9ybT0icm90YXRlKDQ1KSI+PHJlY3QgeD0iMCIgeT0iMCIgd2lkdGg9IjUiIGhlaWdodD0iNSIgZmlsbD0icmdiYSgyNTUsMjU1LDI1NSwwLjA4KSIvPjwvcGF0dGVybj48L2RlZnM+PHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0idXJsKCNwYXR0ZXJuKSIvPjwvc3ZnPg==');
    opacity: 0.2;
}

.about-image-content {
    text-align: center;
    padding: 30px;
    position: relative;
    z-index: 1;
}

.about-image h4 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.about-image p {
    max-width: 300px;
    margin: 0 auto 25px;
    opacity: 0.9;
}

.mission-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 30px;
}

.mission-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--white);
}

.mission-stat i {
    font-size: 1.5rem;
    margin-bottom: 8px;
    opacity: 0.9;
}

.mission-stat span {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 联系区域 */
.contact {
    padding: 100px 0;
    background-color: var(--white);
}

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

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--text-dark);
    font-weight: 700;
}

.contact-details {
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    margin-bottom: 25px;
    align-items: flex-start;
}

.contact-item i {
    color: var(--primary-blue);
    font-size: 1.4rem;
    margin-right: 15px;
    min-width: 25px;
    margin-top: 5px;
}

.contact-item-content h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.contact-item-content p {
    color: var(--text-medium);
    font-size: 1.05rem;
}

.map-container {
    height: 300px;
    background: linear-gradient(45deg, #1a73e8, #0d47a1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    position: relative;
}

.map-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
}

.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--text-dark);
    font-weight: 700;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--light-gray);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary-blue);
    outline: none;
    background-color: var(--white);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}

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

/* 登录提示弹窗 */
.login-notice {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.notice-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

.notice-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 2rem;
}

.notice-content h3 {
    color: var(--text-dark);
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.notice-content p {
    color: var(--text-medium);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 0;
}

.notice-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notice-close:hover {
    background-color: var(--light-gray);
    color: var(--text-dark);
}

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

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

/* 页脚 */
footer {
    background: linear-gradient(135deg, var(--dark-blue), #0a2c5d);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 50px;
    margin-bottom: 50px;
}

.footer-col {
    min-width: 0; /* 防止内容溢出 */
}

.footer-col-main {
    grid-column: 1; /* PC端保持第一列 */
}

.footer-col h4 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
    font-weight: 600;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--accent-blue);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
    line-height: 1.7;
}

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

.footer-col ul li {
    margin-bottom: 15px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.footer-col ul li a:hover {
    color: var(--white);
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-link:hover {
    background-color: var(--accent-blue);
    transform: translateY(-5px);
    border-color: var(--accent-blue);
}

.social-link i {
    font-size: 20px;
    transition: var(--transition);
}

.social-link:hover i {
    transform: scale(1.1);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.contact-info {
    margin-top: 10px;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content,
    .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        height: 400px;
        order: -1;
    }

    .hero h2 {
        font-size: 2.8rem;
    }
    nav ul{
        gap: 16px;
    }
    .fa-user{
        display: none;
    }

    /* 平板端footer - 保持4列布局，但调整间距 */
    .footer-container {
        gap: 35px;
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        z-index: 1000;
    }

    nav ul.show {
        display: flex;
    }

    nav ul li {
        margin: 10px 0;
    }

    .mobile-toggle {
        display: block;
        margin-right: 8px;
        cursor: pointer;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .product-categories {
        grid-template-columns: 1fr;
    }

    .highlight-item {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .stories-grid {
        grid-template-columns: 1fr;
    }

    .story-card {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .contact-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .contact-actions {
        align-items: center;
    }

    .hero-text {
        text-align: center;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-stats {
        justify-content: center;
        gap: 30px;
    }

    .hero-icon {
        width: 150px;
        height: 150px;
        font-size: 3rem;
    }

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

    .section-title h2 {
        font-size: 2rem;
    }

    .features,
    .products,
    .services,
    .about,
    .contact,
    .featured-products,
    .services-showcase,
    .customer-stories,
    .contact-section {
        padding: 80px 0;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .org-grid {
        grid-template-columns: 1fr;
    }

    .footer-container {
        display: none;
        gap: 40px;
    }
    .copyright{
        border-top: none;
        padding-top: 0;
    }
    .timeline{
        display: none;
    }
    .stats-section{
        display: none;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 20px;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .btn {
        /*width: 100%;*/
        padding: 14px 20px;
    }

    .features,
    .products,
    .services,
    .about,
    .contact {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

            .section-title h2::after {
            bottom: -12px;
            height: 3px;
        }
    }

    /* 查看更多按钮样式 */
    .section-more {
        text-align: center;
        margin-top: 50px;
    }

    .section-more .btn {
        padding: 16px 40px;
        font-size: 1.1rem;
        border-radius: 50px;
        transition: all 0.3s ease;
    }

    .section-more .btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

    .about-more {
        margin-top: 40px;
    }

    .about-more .btn {
        padding: 14px 32px;
        font-size: 1rem;
        border-radius: 50px;
        transition: all 0.3s ease;
    }

    .about-more .btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    .contact-more {
        margin-top: 30px;
    }

    .contact-more .btn {
        padding: 14px 32px;
        font-size: 1rem;
        border-radius: 50px;
        transition: all 0.3s ease;
    }

    .contact-more .btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

    /* 页面标题样式 */
    .page-header {
        background: var(--gradient-primary);
        color: var(--white);
        padding: 80px 0 60px;
        text-align: center;
    }

    .page-header h1 {
        font-size: 2.5rem;
        margin-bottom: 15px;
        font-weight: 700;
    }

    .page-header p {
        font-size: 1.2rem;
        opacity: 0.9;
        max-width: 600px;
        margin: 0 auto;
    }

    /* 时间线样式 */
    .timeline {
        padding: 100px 0;
        background-color: var(--white);
    }

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

    .timeline-container::before {
        content: '';
        position: absolute;
        left: 50%;
        top: 0;
        bottom: 0;
        width: 2px;
        background: var(--primary-blue);
        transform: translateX(-50%);
    }

    .timeline-item {
        position: relative;
        margin-bottom: 50px;
        display: flex;
        align-items: center;
    }

    .timeline-item:nth-child(odd) {
        flex-direction: row;
    }

    .timeline-item:nth-child(even) {
        flex-direction: row-reverse;
    }

    .timeline-year {
        background: var(--primary-blue);
        color: var(--white);
        padding: 12px 24px;
        border-radius: 25px;
        font-weight: 600;
        font-size: 1.1rem;
        position: relative;
        z-index: 2;
    }

    .timeline-content {
        background: var(--white);
        padding: 25px;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow-md);
        margin: 0 30px;
        flex: 1;
        max-width: 300px;
    }

    .timeline-content h3 {
        color: var(--primary-blue);
        margin-bottom: 10px;
        font-size: 1.2rem;
    }

    .timeline-content p {
        color: var(--text-medium);
        margin: 0;
    }

    /* 企业文化样式 */
    .culture {
        padding: 100px 0;
        background-color: var(--light-gray);
    }

    .culture-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 30px;
    }

    .culture-item {
        background: var(--white);
        padding: 40px 30px;
        border-radius: var(--border-radius);
        text-align: center;
        box-shadow: var(--shadow-md);
        transition: var(--transition);
    }

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

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

    .culture-item:hover .culture-icon {
        background: var(--primary-blue);
        color: var(--white);
        transform: scale(1.1);
    }

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

    .culture-item p {
        color: var(--text-medium);
        line-height: 1.6;
    }

    /* 服务流程样式 */
    .service-process {
        padding: 100px 0;
        background-color: var(--light-gray);
    }

    .process-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 30px;
        margin-top: 50px;
    }

    .process-step {
        text-align: center;
        background: var(--white);
        padding: 30px 20px;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow-md);
        transition: var(--transition);
    }

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

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

    .process-step:hover .process-icon {
        background: var(--primary-blue);
        color: var(--white);
        transform: scale(1.1);
    }

    .process-step h3 {
        font-size: 1.2rem;
        margin-bottom: 10px;
        color: var(--text-dark);
        font-weight: 600;
    }

    .process-step p {
        color: var(--text-medium);
        font-size: 0.95rem;
    }

    /* 分支机构样式 */
    .branches {
        padding: 100px 0;
        background-color: var(--white);
    }

    .branches-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
    }

    .branch-card {
        background: var(--white);
        padding: 30px;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow-md);
        text-align: center;
        transition: var(--transition);
        border: 1px solid var(--medium-gray);
    }

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

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

    .branch-card:hover .branch-icon {
        background: var(--primary-blue);
        color: var(--white);
        transform: scale(1.1);
    }

    .branch-card h3 {
        font-size: 1.3rem;
        margin-bottom: 10px;
        color: var(--text-dark);
        font-weight: 600;
    }

    .branch-card p {
        color: var(--text-medium);
        margin-bottom: 20px;
    }

    .branch-contact p {
        margin: 8px 0;
        font-size: 0.95rem;
        color: var(--text-medium);
    }

    .branch-contact i {
        color: var(--primary-blue);
        margin-right: 8px;
    }

/* 补充移动端适配增强 */
@media (max-width: 768px) {
  .header-container { padding: 12px 0; }
  .logo { width: 120px; height: 120px; font-size: 20px; border-radius: 12px; }
  .logo.has-image img { width: 100%; height: 100%; }
  .logo-container { min-height: 56px; }
  .brand-link { padding-left: 68px; }
  .logo-text h1 { font-size: 20px; }
  .logo-text p { display: none; }
  nav a { font-size: 15px; }
  .section-title p { font-size: 1rem; }

  /* 时间线在小屏改为单列 */
  .timeline-container::before { display: none; }
  .timeline-item { flex-direction: column !important; align-items: stretch; margin-bottom: 30px; }
  .timeline-year { align-self: center; margin-bottom: 12px; }
  .timeline-content { max-width: none; margin: 0; }

  /* 中等屏幕footer优化 - 改为2列布局，部分居中 */
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 35px;
  }

  .footer-col-main {
    grid-column: 1;
    text-align: center;
  }

  .footer-col:nth-child(3) {
    grid-column: 1;
    text-align: center;
  }

  .footer-col:nth-child(4) {
    grid-column: 2;
  }

  .footer-col:nth-child(5) {
    grid-column: 2;
  }

  /* 中等屏幕时，前两列标题居中 */
  .footer-col-main h4::after,
  .footer-col:nth-child(3) h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-col-main .social-links {
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .page-header { padding: 60px 0 48px; }
  .page-header h1 { font-size: 2rem; }
  .page-header p { font-size: 1rem; }

  /* 移动端footer优化 - 单列布局，居中显示 */
  footer {
    padding: 40px 0 20px;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 30px;
  }

  .footer-col-main {
    grid-column: 1;
    text-align: center;
  }

  .footer-col h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    text-align: center;
  }

  .footer-col h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-col ul {
    text-align: center;
  }

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

  .social-links {
    justify-content: center;
    gap: 12px;
  }

  .social-link {
    width: 40px;
    height: 40px;
  }

  .social-link i {
    font-size: 18px;
  }

  .copyright {
    padding-top: 20px;
    font-size: 0.9rem;
  }

  .contact-info {
    font-size: 0.85rem;
    line-height: 1.5;
  }

  /* 移动端登录提示弹窗优化 */
  .notice-content {
    padding: 30px 20px;
    margin: 20px;
    max-width: none;
    width: calc(100% - 40px);
  }

  .notice-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    margin-bottom: 15px;
  }

  .notice-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
  }

  .notice-content p {
    font-size: 1rem;
  }
}

/* 菜单靠右，logo保持最左 */
header .header-container { justify-content: flex-start; }
.logo-container { margin-right: 24px; }
header .header-container > nav { flex: 1; }
header .header-container > nav ul { width: 100%; justify-content: flex-end; }

/* 门户比例优化：菜单整体靠右但不贴边，登录与菜单保持合理间距 */
header .header-container > nav ul { padding-right: 12px; }
nav ul li:not(.nav-cta) { margin-right: 20px; }
@media (max-width: 768px) {
  nav ul li:not(.nav-cta) { margin-right: 0; }
}

/* 登录CTA 无底部下划线，并与菜单区分 */
nav ul .nav-cta a::after { content: none !important; display: none !important; }

/* 品牌区域优化 */
.logo-container { position: relative; display: flex; align-items: center; min-height: 72px; }
.brand-link { display: inline-flex; align-items: center; gap: 20px; text-decoration: none; padding-left: 88px; position: relative; }
.brand-link .logo { position: absolute; left: 0; top: 50%; transform: translateY(-50%);margin-left: 8px }
.brand-link .logo-text { display: flex; flex-direction: column; gap: 2px; }
.brand-link .logo-text h1 { color: var(--dark-blue); }
.brand-link .logo-text p { color: var(--text-light); }

@media (max-width: 768px) {
  .brand-link .logo-text p { display: none; }
}

/* 分页与工具栏 */
.products-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  padding: 12px 16px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.products-toolbar .page-size {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-medium);
}

.products-toolbar select {
  padding: 6px 10px;
  border: 1px solid var(--medium-gray);
  border-radius: 8px;
  background: var(--light-gray);
  color: var(--text-dark);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.pagination .page-btn,
.pagination .page-number {
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid var(--medium-gray);
  background: var(--white);
  color: var(--text-dark);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  user-select: none;
}

.pagination .page-btn:hover,
.pagination .page-number:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pagination .page-number.active {
  background: var(--primary-blue);
  color: var(--white);
  border-color: var(--primary-blue);
}

.pagination .page-btn[disabled],
.pagination .page-number[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* 产品卡片隐藏的过渡（分页切换时更顺滑） */
.products-grid .product-card[hidden] {
  display: none !important;
}

/* 小屏优化 */
@media (max-width: 600px) {
  .products-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .products-toolbar .page-size {
    justify-content: flex-end;
  }
}

/* 产品详情模态框 */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  overflow-y: auto;
}

.modal-content {
  background-color: var(--white);
  margin: 20px auto;
  max-width: 1200px;
  width: 95%;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--medium-gray);
  background: var(--light-gray);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.modal-header h2 {
  margin: 0;
  color: var(--dark-blue);
  font-size: 1.5rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-medium);
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--medium-gray);
  color: var(--text-dark);
}

.modal-body {
  padding: 24px;
}

/* 产品详情网格 */
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

/* 产品图片展示 */
.product-gallery {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.main-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.main-image img {
  width: 100%;
  height: auto;
  display: block;
}

.thumbnail-list {
  display: flex;
  gap: 12px;
}

.thumbnail {
  width: 80px;
  height: 60px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}

.thumbnail.active {
  border-color: var(--primary-blue);
}

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

.thumbnail:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* 产品信息 */
.product-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.product-header h3 {
  margin: 0 0 12px 0;
  color: var(--dark-blue);
  font-size: 1.8rem;
}

.category-tag {
  display: inline-block;
  background: var(--primary-blue);
  color: var(--white);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

.product-description p {
  color: var(--text-medium);
  line-height: 1.6;
  margin: 0;
}

.product-features h4 {
  margin: 0 0 16px 0;
  color: var(--dark-blue);
  font-size: 1.2rem;
}

.product-features ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.product-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-medium);
}

.product-features i {
  color: var(--success-green);
  margin-top: 2px;
  flex-shrink: 0;
}

.product-actions {
  display: flex;
  gap: 16px;
  margin-top: auto;
}

.product-actions .btn {
  flex: 1;
  justify-content: center;
}

/* 产品规格参数 */
.product-specs {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--medium-gray);
}

.product-specs .section-title {
  margin-bottom: 24px;
}

.product-specs .section-title h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.product-specs .section-title p {
  font-size: 1rem;
  margin: 0;
}

/* 标签页 */
.specs-tabs {
  background: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.tab-buttons {
  display: flex;
  background: var(--light-gray);
  border-bottom: 1px solid var(--medium-gray);
}

.tab-btn {
  flex: 1;
  padding: 16px 20px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-medium);
  font-weight: 500;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}

.tab-btn:hover {
  background: var(--white);
  color: var(--text-dark);
}

.tab-btn.active {
  background: var(--white);
  color: var(--primary-blue);
  border-bottom-color: var(--primary-blue);
}

.tab-content {
  padding: 24px;
}

.tab-panel {
  display: none;
}

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

/* 规格网格 */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.spec-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: var(--light-gray);
  border-radius: 8px;
}

.spec-label {
  font-weight: 600;
  color: var(--text-dark);
  font-size: 0.95rem;
}

.spec-value {
  color: var(--text-medium);
  line-height: 1.5;
}

/* 应用场景 */
.application-scenarios {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--medium-gray);
}

.application-scenarios .section-title {
  margin-bottom: 24px;
}

.application-scenarios .section-title h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.application-scenarios .section-title p {
  font-size: 1rem;
  margin: 0;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.scenario-card {
  background: var(--white);
  padding: 24px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
}

.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.scenario-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

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

.scenario-card h4 {
  margin: 0 0 12px 0;
  color: var(--dark-blue);
  font-size: 1.1rem;
}

.scenario-card p {
  margin: 0;
  color: var(--text-medium);
  line-height: 1.5;
  font-size: 0.95rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .modal-content {
    margin: 10px;
    width: calc(100% - 20px);
    max-height: 95vh;
  }

  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .product-actions {
    flex-direction: column;
  }

  .specs-grid {
    grid-template-columns: 1fr;
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
  }

  .tab-buttons {
    flex-wrap: wrap;
  }

  .tab-btn {
    min-width: 120px;
  }
}

@media (max-width: 480px) {
  .modal-header {
    padding: 16px 20px;
  }

  .modal-body {
    padding: 20px;
  }

  .product-header h3 {
    font-size: 1.25rem;
  }

  .thumbnail-list {
    gap: 8px;
  }
}

/* 新增板块样式 */

/* 快速导航 */
.quick-nav {
    padding: 60px 0;
    background: var(--white);
    border-bottom: 1px solid var(--medium-gray);
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 20px;
    text-decoration: none;
    color: var(--text-medium);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-item:hover {
    color: var(--primary-blue);
    background: var(--light-blue);
    border-color: var(--primary-blue);
    transform: translateY(-4px);
}

.nav-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    transition: var(--transition);
}

.nav-item:hover .nav-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(25, 118, 210, 0.3);
}

.nav-item span {
    font-weight: 500;
    text-align: center;
}

/* 客户案例展示 */
.customer-stories {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.story-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--medium-gray);
    transition: var(--transition);
    display: flex;
    gap: 25px;
    align-items: center;
}

.story-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.story-image {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2.5rem;
    flex-shrink: 0;
}

.story-content {
    flex: 1;
}

.story-content h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 600;
}

.story-content p {
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 1.6;
}

.story-metrics {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.metric {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(25, 118, 210, 0.2);
}

/* 统计数据展示 */
.stats-section {
    background: var(--gradient-primary);
    padding: 80px 0;
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.stat-item:nth-child(1) { animation-delay: 0.1s; }
.stat-item:nth-child(2) { animation-delay: 0.2s; }
.stat-item:nth-child(3) { animation-delay: 0.3s; }
.stat-item:nth-child(4) { animation-delay: 0.4s; }

.stat-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 500;
}

/* 联系我们区域 */
.contact-section {
    padding: 100px 0;
    background: var(--gradient-primary);
    color: var(--white);
}

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

.contact-text h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.contact-text p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
}

.contact-method i {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    backdrop-filter: blur(10px);
}

.contact-actions {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
}

.contact-actions .btn {
    padding: 16px 32px;
    font-size: 1.1rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

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

.contact-actions .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-3px);
}

.contact-actions .btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.7);
}

.contact-actions .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
    transform: translateY(-3px);
}

/* 为什么选择我们 */
.why-choose-us {
    padding: 100px 0;
    background: var(--white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.advantage-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--medium-gray);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.advantage-card:nth-child(1) { animation-delay: 0.1s; }
.advantage-card:nth-child(2) { animation-delay: 0.2s; }
.advantage-card:nth-child(3) { animation-delay: 0.3s; }
.advantage-card:nth-child(4) { animation-delay: 0.4s; }

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.advantage-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 40px;
    color: var(--white);
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(25, 118, 210, 0.3);
}

.advantage-card h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    font-weight: 600;
}

.advantage-card p {
    color: var(--text-medium);
    line-height: 1.6;
}

/* 客户案例 */
.case-studies {
    padding: 100px 0;
    background: var(--light-gray);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.case-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.case-card:nth-child(1) { animation-delay: 0.1s; }
.case-card:nth-child(2) { animation-delay: 0.2s; }
.case-card:nth-child(3) { animation-delay: 0.3s; }

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    height: 200px;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: var(--white);
    flex-shrink: 0;
}

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

.case-content h3 {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.3;
    min-height: 2.6rem;
    display: flex;
    align-items: center;
}

.case-description {
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 4.8rem;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}

.case-tag {
    background: var(--light-blue);
    color: var(--primary-blue);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* 新闻动态 */
.news-section {
    padding: 100px 0;
    background: var(--white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.news-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--medium-gray);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.news-date {
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
    padding: 20px;
    position: relative;
}

.news-date .day {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.news-date .month {
    font-size: 1rem;
    opacity: 0.9;
}

.news-content {
    padding: 30px;
}

.news-content h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.4;
}

.news-content p {
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 20px;
}

.news-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.news-link:hover {
    color: var(--dark-blue);
    gap: 12px;
}

.news-link i {
    font-size: 0.9rem;
    transition: var(--transition);
}

/* 联系我们 */
.contact-section {
    padding: 100px 0;
    background: var(--light-gray);
}

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

.contact-text h2 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 700;
}

.contact-text p {
    font-size: 1.1rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 30px;
}

.contact-info {
    margin-bottom: 30px;
}

.contact-info .contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    padding: 16px 20px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.contact-info .contact-item i {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
}

.contact-info .contact-item span {
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}

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

.contact-icon {
    width: 200px;
    height: 200px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

/* 响应式设计补充 */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .cases-grid,
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .case-card {
        height: auto;
    }

    .case-content h3 {
        min-height: auto;
    }

    .case-description {
        min-height: auto;
        -webkit-line-clamp: 3;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .contact-text h2 {
        font-size: 2rem;
    }

    .contact-icon {
        width: 150px;
        height: 150px;
        font-size: 60px;
    }

    .nav-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }

    .nav-item {
        padding: 15px 10px;
    }

    .nav-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

@media (max-width: 576px) {
    .stats-section {
        padding: 60px 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .why-choose-us,
    .case-studies,
    .news-section,
    .contact-section {
        padding: 60px 0;
    }

    .advantage-card {
        padding: 30px 20px;
    }

    .case-content,
    .news-content {
        padding: 20px;
    }

    .contact-text h2 {
        font-size: 1.75rem;
    }

    .quick-nav {
        padding: 40px 0;
    }

    .nav-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .nav-item {
        padding: 15px 8px;
    }

    .nav-icon {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }

    .nav-item span {
        font-size: 0.9rem;
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
}

.back-to-top.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--gradient-secondary);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.4);
}

.back-to-top:active {
    transform: translateY(-1px);
}

/* 产品卡片优化 */
.product-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.product-card:active {
    transform: translateY(-2px);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.product-image {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 32px;
    color: var(--white);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.product-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.2) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.product-image i {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3.5rem;
    z-index: 2;
    pointer-events: none;
    transition: transform 0.3s ease, font-size 0.3s ease;
}

.product-card:hover .product-image::after {
    transform: translateX(100%);
}

.product-card:hover .product-image i {
    transform: translate(-50%, -50%) scale(1.1);
    font-size: 3.8rem;
}

.product-card:hover .product-image {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.product-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-content h3 {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    font-weight: 600;
}

.product-content p {
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-content .btn {
    align-self: center;
    margin-top: auto;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    justify-content: center;
}

.feature-tag {
    background: var(--light-blue);
    color: var(--primary-blue);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.feature-tag:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

/* 响应式优化 */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 16px;
    }

    .product-card {
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .product-image {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        position: relative;
        border-radius: 50%;
        margin: 0 auto 15px auto;
    }

    .product-image i {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        font-size: 2.5rem;
    }

    .product-content {
        padding: 0;
        width: 100%;
    }
}

@media (max-width: 576px) {
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 14px;
    }

    .product-card {
        padding: 15px;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .product-image {
        width: 80px;
        height: 80px;
        font-size: 2rem;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        position: relative;
        border-radius: 50%;
        margin: 0 auto 15px auto;
    }

    .product-image i {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        font-size: 2rem;
    }

    .product-content {
        padding: 0;
        width: 100%;
    }
}

/* 页面加载状态 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--light-gray);
    color: var(--text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
}

body.loaded {
    opacity: 1;
}

/* 页面加载动画 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--light-gray);
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 内容淡入动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 优化移动端滚动 */
@media (max-width: 768px) {
    html {
        -webkit-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
    }

    body {
        -webkit-overflow-scrolling: touch;
    }

    /* 防止移动端点击延迟 */
    a, button, input, textarea {
        -webkit-tap-highlight-color: transparent;
    }
}

.carousel-cta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* 轮播图按钮特殊样式 */
.carousel-cta .btn {
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
    font-weight: 600;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.carousel-cta .btn-primary {
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
    color: #1976d2;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.carousel-cta .btn-primary:hover {
    background: linear-gradient(135deg, #ffffff, #e9ecef);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.carousel-cta .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.carousel-cta .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: #ffffff;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* 特色产品展示 */
.featured-products {
    padding: 100px 0;
    background-color: var(--light-gray);
}

/* 宽容器样式 - 90%屏幕宽度 */
.container-wide {
    width: 90%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 产品图片展示 - 2排布局 */
.products-showcase {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 60px;
}

.product-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    width: 100%;
}

.product-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
    width: 100%;
}

.product-item.large {
    /* 大尺寸产品项 */
}

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

.product-image {
    position: relative;
    width: 100%;
    height: 280px;
    background: none; /* 覆盖上方通用样式的背景色 */
    border-radius: var(--border-radius);
    overflow: hidden;
}

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

.product-item:hover .product-image img {
    transform: scale(1.1);
}

.product-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--white);
    padding: 30px 20px 20px;
    text-align: center;
}

.product-overlay h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

/* 响应式设计 */
@media (max-width: 1400px) {
    .product-row {
        gap: 25px;
    }

    .product-image {
        height: 250px;
    }
}

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

    .product-row {
        gap: 20px;
    }

    .product-image {
        height: 220px;
    }

    .product-overlay h3 {
        font-size: 1.2rem;
    }
}

@media (max-width: 1024px) {
    .container-wide {
        width: 95%;
    }

    .product-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .product-image {
        height: 200px;
    }

    .product-overlay {
        padding: 25px 15px 15px;
    }

    .product-overlay h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 768px) {
    .container-wide {
        width: 100%;
        padding: 0 15px;
    }

    .products-showcase {
        gap: 20px;
    }

    .product-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .product-image {
        height: 180px;
    }

    .product-overlay {
        padding: 20px 10px 10px;
    }

    .product-overlay h3 {
        font-size: 1rem;
    }
}

/* 凌云支持区域 - 优化设计 */
.lingyun-support-section {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 50%, rgba(255, 255, 255, 0.95) 100%);
    color: var(--dark);
    padding: 80px 0;
    position: relative;
    background-image: url('assets/images/banner1.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.lingyun-support-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 50%, rgba(255, 255, 255, 0.95) 100%);
    z-index: 1;
}

.lingyun-support-section .container {
    position: relative;
    z-index: 2;
}



/* 支持服务卡片 */
.support-services-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-bottom: 60px;
}

.support-service-card {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(100, 181, 246, 0.15);
    border-radius: 16px;
    padding: 25px 18px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    cursor: pointer;
}

.support-service-card:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-4px);
    border-color: rgba(100, 181, 246, 0.3);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
}

.service-icon-wrapper {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #64b5f6, #42a5f5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 24px;
    position: relative;
}

.service-icon-wrapper::after {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: radial-gradient(circle, rgba(100, 181, 246, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: iconGlow 3s ease-in-out infinite;
}

@keyframes iconGlow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

.support-service-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--dark);
    line-height: 1.4;
}





/* 响应式设计 */
@media (max-width: 1200px) {
    .support-services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .support-background-image {
        width: 40%;
    }
}

@media (max-width: 768px) {
    .lingyun-support-section {
        padding: 80px 0;
    }





    .support-services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
        margin-bottom: 60px;
    }

    .support-background-image {
        width: 100%;
        opacity: 0.3;
    }


}

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

    .support-service-card {
        padding: 25px 18px;
    }

    .service-icon-wrapper {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    .support-service-card h4 {
        font-size: 1rem;
    }


}

/* 客户案例视频展示样式 */
.customer-stories-video {
    position: relative;
    padding: 120px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    color: var(--dark);
    overflow: hidden;
}

.customer-stories-video::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('assets/images/banner1.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.05;
    z-index: 1;
}

.customer-stories-video .container {
    position: relative;
    z-index: 3;
}

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

/* 案例标题区域 */
.case-study-header {
    margin-bottom: 60px;
}

.case-study-label {
    display: inline-block;
    background: rgba(0, 123, 255, 0.1);
    color: #007bff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 20px;
    border: 1px solid rgba(0, 123, 255, 0.2);
}

.case-study-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin: 0 0 25px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    color: var(--dark); /* Fallback for browsers that don't support background-clip */
}

.case-study-description {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--text-medium);
    max-width: 600px;
    margin: 0 auto;
}

/* 视频播放区域 */
.video-player-section {
    position: relative;
}

.video-placeholder {
    position: relative;
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.05), rgba(255, 255, 255, 0.9));
    border: 2px solid rgba(0, 123, 255, 0.2);
    border-radius: 20px;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 123, 255, 0.1);
}

.play-button {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 123, 255, 0.3);
}

.play-button:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 35px rgba(0, 123, 255, 0.5);
}

.video-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 123, 255, 0.8);
    padding: 8px 15px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.control-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    font-family: monospace;
}

/* 主要行动按钮 */
.btn-video {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    border: none;
    padding: 18px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 123, 255, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
}

.btn-video:hover {
    background: linear-gradient(135deg, #0056b3, #004085);
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 123, 255, 0.5);
}

.btn-video i {
    font-size: 1.1rem;
}

/* 额外链接 */
.video-links {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.video-link {
    color: var(--text-medium);
    text-decoration: none;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    padding: 10px 0;
}

.video-link:hover {
    color: #007bff;
    transform: translateX(5px);
}

.video-link i {
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

.video-link:hover i {
    transform: translateX(3px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .customer-stories-video {
        padding: 80px 0;
    }

    .case-study-title {
        font-size: 2.2rem;
    }

    .case-study-description {
        font-size: 1.1rem;
        padding: 0 20px;
    }

    .video-placeholder {
        height: 300px;
    }

    .play-button {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .video-links {
        flex-direction: column;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .case-study-title {
        font-size: 1.8rem;
    }

    .case-study-description {
        font-size: 1rem;
    }

    .video-placeholder {
        height: 250px;
    }

    .btn-video {
        padding: 15px 30px;
        font-size: 1.1rem;
    }
}

/* 账户覆盖层样式 */
.account-overlay-section {
    position: relative;
    margin-top: 60px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 40px;
}

.account-overlay-card {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(100, 181, 246, 0.2);
    border-radius: 20px;
    padding: 40px;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 10;
    flex-shrink: 0;
}

.account-overlay-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(100, 181, 246, 0.05) 0%, rgba(255, 255, 255, 0.1) 100%);
    border-radius: 20px;
    z-index: -1;
}

.account-overlay-header h3 {
    color: var(--dark);
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0 0 15px;
    background: linear-gradient(135deg, #007bff, #64b5f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.account-overlay-header p {
    color: var(--secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 30px;
}

.account-overlay-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.account-overlay-buttons .btn {
    flex: 1;
    padding: 12px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-login {
    background: linear-gradient(135deg, #007bff, #64b5f6);
    color: white;
    border: 2px solid #007bff;
}

.btn-login:hover {
    background: linear-gradient(135deg, #0056b3, #42a5f5);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 123, 255, 0.3);
}

.btn-create {
    background: transparent;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-create:hover {
    background: rgba(0, 123, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 123, 255, 0.2);
}

.account-overlay-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.feature-item-overlay {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--dark);
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 123, 255, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-item-overlay:last-child {
    border-bottom: none;
}

.feature-item-overlay:hover {
    color: #007bff;
    transform: translateX(5px);
}

.feature-item-overlay i {
    width: 20px;
    color: #64b5f6;
    font-size: 16px;
    transition: all 0.3s ease;
}

.feature-item-overlay:hover i {
    transform: scale(1.1);
}

.feature-item-overlay span {
    font-size: 0.95rem;
    font-weight: 500;
}

/* 右侧背景图片 */
.account-background-image {
    flex: 1;
    max-width: 600px;
    height: 450px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    position: relative;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1), rgba(100, 181, 246, 0.05));
}

.account-background-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    border-radius: 20px;
}

.account-background-image:hover img {
    transform: scale(1.03);
}

/* 图片上的装饰元素 */
.account-background-image::before {
    content: '';
    position: absolute;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    z-index: 2;
    opacity: 0.8;
    backdrop-filter: blur(10px);
}

.account-background-image::after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 40px;
    height: 40px;
    background: rgba(100, 181, 246, 0.8);
    border-radius: 50%;
    z-index: 2;
    opacity: 0.6;
}

/* 响应式设计 */
@media (max-width: 1400px) {
    .account-overlay-section {
        gap: 35px;
    }

    .account-background-image {
        max-width: 550px;
        height: 420px;
    }
}

@media (max-width: 1200px) {
    .account-overlay-section {
        gap: 30px;
    }

    .account-background-image {
        max-width: 500px;
        height: 380px;
    }
}

@media (max-width: 992px) {
    .account-overlay-section {
        gap: 25px;
    }

    .account-background-image {
        max-width: 450px;
        height: 350px;
    }
}

@media (max-width: 768px) {
    .account-overlay-section {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        margin-top: 40px;
        gap: 30px;
    }

    .account-overlay-card {
        max-width: 100%;
        margin: 0 20px;
        padding: 30px 25px;
    }

    .account-background-image {
        max-width: 100%;
        height: 320px;
        margin: 0 20px;
    }

    .account-overlay-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .account-overlay-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .account-overlay-card {
        padding: 25px 20px;
    }

    .account-overlay-header h3 {
        font-size: 1.6rem;
    }

    .account-overlay-header p {
        font-size: 0.95rem;
    }

    .account-background-image {
        height: 280px;
        margin: 0 15px;
    }

    .account-overlay-section {
        gap: 25px;
    }
}