/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 固定联系按钮 */
.fixed-contact-buttons {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    text-decoration: none;
    color: #333;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.contact-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: left 0.3s ease;
    z-index: -1;
}

.contact-btn:hover::before {
    left: 0;
}

.contact-btn:hover {
    transform: translateX(10px) scale(1.05);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.3);
    color: white;
}

.contact-btn i {
    font-size: 1.5rem;
    margin-bottom: 5px;
    transition: all 0.3s ease;
}

.contact-btn span {
    font-size: 0.7rem;
    font-weight: 600;
    text-align: center;
    line-height: 1.2;
    transition: all 0.3s ease;
}

.contact-btn:hover i,
.contact-btn:hover span {
    color: white;
}

/* 不同按钮的特殊样式 */
.hospital-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hospital-btn:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

.doctor-btn {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
}

.doctor-btn:hover {
    background: linear-gradient(135deg, #218838 0%, #1ea085 100%);
}

.sales-btn {
    background: linear-gradient(135deg, #fd7e14 0%, #e83e8c 100%);
    color: white;
}

.sales-btn:hover {
    background: linear-gradient(135deg, #e8690b 0%, #d63384 100%);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .fixed-contact-buttons {
        left: 10px;
        gap: 10px;
    }
    
    .contact-btn {
        width: 60px;
        height: 60px;
    }
    
    .contact-btn i {
        font-size: 1.2rem;
        margin-bottom: 3px;
    }
    
    .contact-btn span {
        font-size: 0.6rem;
    }
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 0.75rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    min-height: 90px;
}

.navbar.scrolled {
    background: rgba(102, 126, 234, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.5rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    position: relative;
    width: 100%;
    box-sizing: border-box;
}

.logo-container {
    display: flex;
    align-items: center;
    height: 70px;
    flex-shrink: 0;
    margin-right: 2rem;
}

.logo {
    height: 70px;
    width: auto;
    max-width: 320px;
    object-fit: contain;
    display: block;
}

.logo-text {
    color: white;
    font-size: 1.4rem;
    font-weight: bold;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.2;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    justify-content: flex-end;
}

.nav-item {
    position: relative;
    margin: 0 1rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    font-weight: 500;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    border-radius: 25px;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.nav-link::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.nav-link:hover {
    transform: translateY(-3px);
    color: #fff;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.nav-link:hover::before {
    opacity: 1;
    transform: scale(1);
}

.nav-link:hover::after {
    width: 100px;
    height: 100px;
}

.nav-link:active {
    transform: translateY(-1px);
    transition: all 0.1s ease;
}

/* 下拉箭头动画 */
.nav-link i {
    transition: transform 0.3s ease;
}

.dropdown:hover .nav-link i,
.dropdown.active .nav-link i {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-20px) scale(0.95);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    min-width: 240px;
    border-radius: 16px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 8px 16px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    overflow: hidden;
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid rgba(255, 255, 255, 0.98);
    filter: drop-shadow(0 -2px 4px rgba(0, 0, 0, 0.1));
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: #333;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    font-weight: 500;
    letter-spacing: 0.3px;
    overflow: hidden;
}

.dropdown-menu a::before {
    content: '';
    position: absolute;
    left: -100%;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    transition: left 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: -2;
}

.dropdown-menu a::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: -1;
}

.dropdown-menu a:last-child {
    border-bottom: none;
    border-radius: 0 0 16px 16px;
}

.dropdown-menu a:first-child {
    border-radius: 16px 16px 0 0;
}

/* 菜单项悬停状态 - 合并所有效果 */
.dropdown-menu a:hover {
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transform: scale(1.02);
    box-shadow: 
        0 4px 12px rgba(102, 126, 234, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border-left: 3px solid rgba(255, 255, 255, 0.8);
    animation: menuItemPulse 0.6s ease-out;
}

.dropdown-menu a:hover::before {
    left: 100%;
}

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

/* 菜单项激活状态 */
.dropdown-menu a:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
}

/* 脉冲动画 */
@keyframes menuItemPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
    }
    100% {
        transform: scale(1.02);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    }
}

/* 菜单图标样式 */
.menu-icon {
    margin-right: 0.75rem;
    font-size: 0.9rem;
    opacity: 0.7;
    transition: all 0.3s ease;
    width: 16px;
    text-align: center;
}

.dropdown-menu a:hover .menu-icon {
    opacity: 1;
    transform: rotate(360deg) scale(1.2);
    color: rgba(255, 255, 255, 0.9);
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.5));
}

/* 不同类型图标的特殊动画 */
.dropdown-menu a:hover .fa-star {
    animation: sparkle 0.8s ease-in-out;
}

.dropdown-menu a:hover .fa-cogs {
    animation: rotate 1s ease-in-out;
}

.dropdown-menu a:hover .fa-dollar-sign {
    animation: bounce 0.6s ease-in-out;
}

.dropdown-menu a:hover .fa-hospital,
.dropdown-menu a:hover .fa-user-md,
.dropdown-menu a:hover .fa-handshake {
    animation: pulse 0.6s ease-in-out;
}

@keyframes sparkle {
    0%, 100% { transform: rotate(0deg) scale(1); filter: brightness(1); }
    50% { transform: rotate(180deg) scale(1.3); filter: brightness(1.5); }
}

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

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

/* 单个子菜单项的延迟动画 */
.dropdown-menu a:nth-child(1) { 
    transition-delay: 0.05s; 
}
.dropdown-menu a:nth-child(2) { 
    transition-delay: 0.1s; 
}
.dropdown-menu a:nth-child(3) { 
    transition-delay: 0.15s; 
}
.dropdown-menu a:nth-child(4) { 
    transition-delay: 0.2s; 
}
.dropdown-menu a:nth-child(5) { 
    transition-delay: 0.25s; 
}

/* 活跃页面样式 */
.nav-link.active {
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.1) 100%);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transform: translateY(-2px);
}

.nav-link.active::before {
    opacity: 1;
    transform: scale(1);
}

/* 导航栏磨砂玻璃效果增强 */
.navbar {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* 导航栏滚动时的样式 */
.navbar.scrolled {
    background: rgba(102, 126, 234, 0.9);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

/* Logo悬浮效果 */
.logo-container:hover .logo {
    transform: scale(1.08);
    filter: brightness(1.15) drop-shadow(0 4px 8px rgba(0,0,0,0.2));
    transition: all 0.3s ease;
}

.logo {
    transition: all 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.logo-container:hover .logo-text {
    transform: scale(1.05);
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

/* 导航项整体悬浮效果 */
.nav-item:hover {
    z-index: 10;
}

/* 活跃下拉菜单父项样式 */
.dropdown.active-parent > .nav-link {
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.08) 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

/* 悬浮时的特殊动画效果 */
@keyframes navPulse {
    0% { box-shadow: 0 8px 25px rgba(0,0,0,0.2); }
    50% { box-shadow: 0 12px 35px rgba(0,0,0,0.3); }
    100% { box-shadow: 0 8px 25px rgba(0,0,0,0.2); }
}

.nav-link:hover {
    animation: navPulse 2s ease-in-out infinite;
}

/* 优化下拉菜单的打开动画 */
@keyframes dropdownSlideIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    animation: dropdownSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 主要内容区域 */
.main-content {
    margin-top: 90px;
    min-height: calc(100vh - 160px);
    padding-top: 0;
}

/* Hero 区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom center/cover;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s both;
}

.btn-hero {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.4s both;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    background: #f8f9fa;
}

/* 内容区域 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px rgba(102, 126, 234, 0.2);
}

/* 卡片渐变光影叠加层 */
.card-gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
    border-radius: 15px;
}

/* 卡片内容层级调整 */
.card > *:not(.card-gradient-overlay) {
    position: relative;
    z-index: 2;
}

/* 卡片呼吸效果（可选） */
@keyframes cardBreath {
    0%, 100% { 
        box-shadow: 0 5px 25px rgba(0,0,0,0.1);
    }
    50% { 
        box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
    }
}

.card.breathing {
    animation: cardBreath 3s ease-in-out infinite;
}

/* 特殊卡片类型 */
.card.highlight {
    border: 2px solid rgba(102, 126, 234, 0.3);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

.card.highlight:hover {
    border-color: rgba(102, 126, 234, 0.6);
    box-shadow: 
        0 25px 50px rgba(102, 126, 234, 0.3),
        0 0 0 1px rgba(102, 126, 234, 0.1);
}

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

/* 特色区域 */
.features {
    background: white;
    padding: 4rem 0;
}

/* 证书展示画廊 */
.certificates-gallery {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.certificates-gallery::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') bottom center/cover;
}

.certificate-title-icon {
    font-size: 2rem;
    margin-right: 1rem;
    color: #667eea;
    animation: certificatePulse 2s ease-in-out infinite;
}

@keyframes certificatePulse {
    0%, 100% { 
        transform: scale(1);
        color: #667eea;
    }
    50% { 
        transform: scale(1.1);
        color: #764ba2;
    }
}

.section-description {
    text-align: center;
    color: #666;
    font-size: 1.2rem;
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 2;
}

/* 核心证书展示行 */
.featured-certificates-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-bottom: 5rem;
}

/* 核心证书展示网格 - 两行四列 */
.featured-certificates-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 5rem;
}

.featured-certificates-grid .certificate-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
}

.featured-certificates-grid .certificate-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

.featured-certificates-grid .certificate-image-container {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.featured-certificates-grid .certificate-preview-image {
    width: 100%;
    height: 100%;
    position: relative;
    background: #f8f9fa;
}

.featured-certificates-grid .certificate-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
    filter: brightness(1.05) contrast(1.05);
    transition: all 0.3s ease;
    display: block;
    background: #f8f9fa;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
}

.featured-certificates-grid .certificate-card:hover .certificate-image {
    transform: scale(1.05);
    filter: brightness(1.1) contrast(1.1);
}

.featured-certificates-grid .certificate-overlay-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    padding: 1.5rem;
    transform: translateY(30px);
    transition: all 0.4s ease;
}

.featured-certificates-grid .certificate-card:hover .certificate-overlay-info {
    transform: translateY(0);
}

.featured-certificates-grid .certificate-badge-premium {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.7rem;
    font-weight: bold;
    display: inline-block;
    margin-bottom: 0.8rem;
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.3);
}

.featured-certificates-grid .certificate-overlay-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.featured-certificates-grid .certificate-overlay-info p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin: 0;
}

.featured-certificates-grid .certificate-actions {
    padding: 1rem 1.5rem;
    text-align: center;
    background: white;
}

.featured-certificates-grid .btn-view-full {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 20px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    font-size: 0.9rem;
}

.featured-certificates-grid .btn-view-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    color: white;
}

.certificate-card-large {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
}

.certificate-card-large:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 25px 60px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

.certificate-image-container {
    position: relative;
    height: 350px;
    overflow: hidden;
}

.certificate-preview-image {
    width: 100%;
    height: 100%;
    position: relative;
    background: #f8f9fa;
}

.certificate-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
    filter: brightness(1.05) contrast(1.05);
    transition: all 0.3s ease;
    display: block;
    background: #f8f9fa;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.05);
}

.certificate-card-large:hover .certificate-image {
    transform: scale(1.05);
    filter: brightness(1.1) contrast(1.1);
}

.certificate-overlay-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    padding: 2rem;
    transform: translateY(50px);
    transition: all 0.4s ease;
}

.certificate-card-large:hover .certificate-overlay-info {
    transform: translateY(0);
}

.certificate-badge-premium {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    display: inline-block;
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.certificate-badge-premium.business {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.certificate-overlay-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.certificate-overlay-info p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
}

.certificate-actions {
    padding: 1.5rem 2rem;
    text-align: center;
    background: white;
}

.btn-view-full {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-view-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
}

/* 技术证书网格标题 */
.certificates-grid-title {
    text-align: center;
    font-size: 2rem;
    margin: 4rem 0 3rem;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.certificates-grid-title i {
    color: #667eea;
    font-size: 1.8rem;
}

/* 证书网格 */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.certificate-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
}

.certificate-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

.certificate-thumbnail {
    height: 200px;
    position: relative;
    overflow: hidden;
    background: #f8f9fa;
}

.certificate-thumbnail-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
    filter: brightness(1.05);
    transition: all 0.3s ease;
    display: block;
    background: #f8f9fa;
    box-shadow: inset 0 0 15px rgba(0,0,0,0.05);
}

.certificate-card:hover .certificate-thumbnail-image {
    transform: scale(1.1);
    filter: brightness(1.1) contrast(1.1);
}

.certificate-hover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(102, 126, 234, 0.9);
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

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

.certificate-hover-overlay i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    animation: zoomPulse 1.5s ease-in-out infinite;
}

@keyframes zoomPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.certificate-hover-overlay span {
    font-weight: 600;
    font-size: 1.1rem;
}

.certificate-info {
    padding: 1.5rem;
}

.certificate-info h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 700;
    line-height: 1.4;
}

.certificate-type {
    color: #667eea;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.certificate-type i {
    font-size: 1rem;
}

.btn-certificate {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn-certificate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
}

.featured-certificate-item {
    position: relative;
    z-index: 2;
}

.certificate-preview {
    background: white;
    border-radius: 20px;
    padding: 0;
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    height: 350px;
}

.certificate-preview:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 25px 60px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

.certificate-image-placeholder {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
    position: relative;
    overflow: hidden;
}

.certificate-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/><circle cx="20" cy="20" r="1" fill="white" opacity="0.1"/><circle cx="80" cy="30" r="1.5" fill="white" opacity="0.1"/><circle cx="30" cy="80" r="1" fill="white" opacity="0.1"/></svg>') repeat;
    animation: certificateFloat 10s ease-in-out infinite;
}

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

.business-license {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
}

.certificate-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255,255,255,0.9);
    color: #667eea;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.certificate-overlay {
    padding: 2rem;
    height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.certificate-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 700;
}

.certificate-info p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.certificate-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.certificate-date,
.certificate-status {
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.certificate-date {
    color: #666;
}

.certificate-status {
    color: #28a745;
    font-weight: bold;
}

.certificate-view-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    align-self: flex-start;
    width: fit-content;
}

.certificate-view-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
}

/* 技术认证证书 */
.certificates-subtitle {
    text-align: center;
    font-size: 2rem;
    margin: 4rem 0 3rem;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.certificates-subtitle i {
    color: #667eea;
    font-size: 1.8rem;
}

.certificate-grid-enhanced {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.certificate-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    position: relative;
}

.certificate-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

.certificate-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.certificate-header::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    right: 0;
    height: 20px;
    background: white;
    border-radius: 20px 20px 0 0;
}

.certificate-icon.ai-cert {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    backdrop-filter: blur(10px);
}

.certificate-icon.processing-cert {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    backdrop-filter: blur(10px);
}

.certificate-icon.cloud-cert {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    backdrop-filter: blur(10px);
}

.certificate-icon.security-cert {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    backdrop-filter: blur(10px);
}

.certificate-icon.ai-mark-cert {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    backdrop-filter: blur(10px);
}

.certificate-icon.ct-cert {
    background: rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    backdrop-filter: blur(10px);
}

.certificate-badge-mini {
    background: rgba(255,255,255,0.9);
    color: #667eea;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.certificate-content {
    padding: 2rem;
    position: relative;
    z-index: 2;
}

.certificate-content h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 700;
    line-height: 1.4;
}

.certificate-content p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.certificate-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.certificate-features span {
    background: #f8f9fa;
    color: #28a745;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.certificate-features i {
    font-size: 0.7rem;
}

.certificate-action {
    padding: 0 2rem 2rem;
}

.view-cert-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    width: 100%;
}

.view-cert-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
}

/* 认证声明 */
.certification-statement {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    border: 2px solid rgba(102, 126, 234, 0.1);
    position: relative;
    overflow: hidden;
}

.certification-statement::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.02) 0%, rgba(118, 75, 162, 0.02) 100%);
}

.statement-content {
    position: relative;
    z-index: 2;
}

.statement-icon {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1.5rem;
    animation: statementPulse 3s ease-in-out infinite;
}

@keyframes statementPulse {
    0%, 100% { 
        transform: scale(1);
        color: #667eea;
    }
    50% { 
        transform: scale(1.05);
        color: #764ba2;
    }
}

.statement-content h4 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 700;
}

.statement-content p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}



.feature-item {
    text-align: center;
    padding: 2rem;
    transition: all 0.3s ease;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 2rem;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.feature-desc {
    color: #666;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.footer-section p,
.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    line-height: 1.6;
}

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

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #95a5a6;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* 下载按钮样式 */
.download-btn {
    display: flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transform: translateY(-3px);
}

.download-btn i {
    font-size: 1.5rem;
    margin-right: 0.8rem;
}

.download-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    color: white;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 0.5rem 0;
        min-height: 70px;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .logo-container {
        height: 55px;
    }
    
    .logo {
        height: 50px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .menu-toggle {
        display: flex !important;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(102, 126, 234, 0.95);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        transition: left 0.3s ease;
        padding-top: 2rem;
        backdrop-filter: blur(10px);
        overflow-y: auto;
        z-index: 1000;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 1rem 0;
        width: 90%;
    }
    
    .nav-link {
        display: block;
        text-align: center;
        padding: 1rem;
        width: 100%;
        border-radius: 12px;
        font-size: 1.1rem;
        font-weight: 600;
        margin: 0.25rem 0;
    }
    
    .nav-link:active {
        background: rgba(255,255,255,0.2);
        transform: scale(0.98);
        transition: all 0.1s ease;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: inset 0 2px 10px rgba(0,0,0,0.1);
        border-radius: 12px;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        margin-top: 0.5rem;
        border: 1px solid rgba(255,255,255,0.3);
    }
    
    .dropdown-menu::before {
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        max-height: 300px;
    }
    
    .dropdown-menu a {
        padding: 0.75rem 1.5rem;
        color: #333;
        border-bottom: 1px solid #ddd;
    }
    
    .dropdown-menu a {
        padding: 0.75rem 1.25rem;
        border-radius: 8px;
        margin: 0.25rem;
        background: rgba(255,255,255,0.1);
        border-bottom: none;
    }
    
    .dropdown-menu a:hover,
    .dropdown-menu a:active {
        background: rgba(255,255,255,0.3);
        transform: none;
        padding-left: 1.25rem;
    }
    
    .dropdown-menu a:last-child {
        border-bottom: none;
    }
    
    /* 移动端二级菜单优化 */
    .dropdown-menu a {
        padding: 0.75rem 1.25rem;
        border-radius: 8px;
        margin: 0.25rem;
        background: rgba(255,255,255,0.1);
        border-bottom: none;
        transition: all 0.2s ease;
    }
    
    .dropdown-menu a:hover,
    .dropdown-menu a:active {
        background: rgba(255,255,255,0.3);
        transform: none;
        animation: none;
        box-shadow: none;
        border-left: none;
    }
    
    .dropdown-menu a::before,
    .dropdown-menu a::after {
        display: none;
    }
    
    .menu-icon {
        margin-right: 0.5rem;
        font-size: 0.85rem;
    }
    
    .dropdown-menu a:hover .menu-icon,
    .dropdown-menu a:active .menu-icon {
        transform: none;
        animation: none;
        filter: none;
    }
    
    /* 移动端禁用复杂动画 */
    .nav-link:hover {
        animation: none;
    }
    
    .nav-link::after {
        display: none;
    }
    
    /* 移动端卡片效果优化 */
    .card {
        transition: all 0.2s ease;
    }
    
    .card:hover,
    .card:active {
        transform: translateY(-3px) scale(1.01);
        box-shadow: 0 15px 30px rgba(102, 126, 234, 0.15);
    }
    
    .card-gradient-overlay {
        display: none; /* 移动端禁用光影效果以提升性能 */
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    /* 证书展示画廊移动端优化 */
    .certificates-gallery {
        padding: 3rem 0;
    }
    
    .certificate-title-icon {
        font-size: 1.5rem;
        margin-right: 0.5rem;
    }
    
    .section-description {
        font-size: 1rem;
        margin-bottom: 2rem;
        padding: 0 1rem;
    }
    
    /* 核心证书移动端 */
    .featured-certificates-row {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 3rem;
    }
    
    .featured-certificates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        margin-bottom: 3rem;
        padding: 0 1rem;
    }
    
    .featured-certificates-grid .certificate-image-container {
        height: 150px;
    }
    
    .featured-certificates-grid .certificate-overlay-info {
        padding: 1rem;
        transform: translateY(0);
        background: linear-gradient(transparent, rgba(0,0,0,0.9));
    }
    
    .featured-certificates-grid .certificate-overlay-info h3 {
        font-size: 1rem;
    }
    
    .featured-certificates-grid .certificate-actions {
        padding: 0.8rem 1rem;
    }
    
    .featured-certificates-grid .btn-view-full {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }
    
    .certificate-card-large {
        margin: 0 1rem;
    }
    
    .certificate-image-container {
        height: 280px;
    }
    
    .certificate-overlay-info {
        padding: 1.5rem;
        transform: translateY(0);
        background: linear-gradient(transparent, rgba(0,0,0,0.9));
    }
    
    .certificate-overlay-info h3 {
        font-size: 1.2rem;
    }
    
    .certificate-actions {
        padding: 1rem 1.5rem;
    }
    
    .btn-view-full {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    /* 技术证书网格移动端 */
    .certificates-grid-title {
        font-size: 1.6rem;
        margin: 3rem 0 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .certificates-grid-title i {
        font-size: 1.5rem;
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 3rem;
        padding: 0 1rem;
    }
    
    .certificate-card:hover {
        transform: translateY(-5px) scale(1.01);
        box-shadow: 0 15px 35px rgba(102, 126, 234, 0.15);
    }
    
    .certificate-thumbnail {
        height: 180px;
    }
    
    .certificate-hover-overlay i {
        font-size: 1.8rem;
    }
    
    .certificate-hover-overlay span {
        font-size: 1rem;
    }
    
    .certificate-info {
        padding: 1.2rem;
    }
    
    .certificate-info h4 {
        font-size: 1.1rem;
        margin-bottom: 0.8rem;
    }
    
    .certificate-type {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
    
    .btn-certificate {
        padding: 0.7rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .certificate-image-placeholder {
        height: 180px;
        font-size: 3rem;
    }
    
    .certificate-overlay {
        padding: 1.5rem;
        height: 140px;
    }
    
    .certificate-info h3 {
        font-size: 1.2rem;
    }
    
    .certificate-meta {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .certificate-view-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    /* 技术认证证书移动端 */
    .certificates-subtitle {
        font-size: 1.6rem;
        margin: 3rem 0 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .certificates-subtitle i {
        font-size: 1.5rem;
    }
    
    .certificate-grid-enhanced {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 3rem;
    }
    
    .certificate-card:hover {
        transform: translateY(-5px) scale(1.01);
        box-shadow: 0 15px 35px rgba(102, 126, 234, 0.15);
    }
    
    .certificate-header {
        padding: 1.2rem;
    }
    
    .certificate-icon.ai-cert,
    .certificate-icon.processing-cert,
    .certificate-icon.cloud-cert,
    .certificate-icon.security-cert,
    .certificate-icon.ai-mark-cert,
    .certificate-icon.ct-cert {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .certificate-badge-mini {
        padding: 0.3rem 0.6rem;
        font-size: 0.7rem;
    }
    
    .certificate-content {
        padding: 1.5rem;
    }
    
    .certificate-content h4 {
        font-size: 1.1rem;
        margin-bottom: 0.8rem;
    }
    
    .certificate-content p {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
    
    .certificate-features {
        gap: 0.3rem;
        margin-bottom: 1rem;
    }
    
    .certificate-features span {
        padding: 0.2rem 0.6rem;
        font-size: 0.7rem;
    }
    
    .certificate-action {
        padding: 0 1.5rem 1.5rem;
    }
    
    .view-cert-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    /* 认证声明移动端 */
    .certification-statement {
        padding: 2rem 1.5rem;
        margin: 0 1rem;
    }
    
    .statement-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .statement-content h4 {
        font-size: 1.5rem;
        margin-bottom: 0.8rem;
    }
    
    .statement-content p {
        font-size: 1rem;
        line-height: 1.6;
    }
    

    
    body.menu-open {
        overflow: hidden;
    }
    
    .main-content {
        margin-top: 70px;
    }
}

/* 大屏幕优化 */
@media (min-width: 1400px) {
    .navbar {
        min-height: 100px;
    }
    
    .nav-container {
        max-width: 1600px;
        padding: 0 4rem;
    }
    
    .logo-container {
        height: 80px;
        margin-right: 3rem;
    }
    
    .logo {
        height: 75px;
        max-width: 350px;
    }
    
    .logo-text {
        font-size: 1.6rem;
    }
    
    .nav-item {
        margin: 0 1.5rem;
    }
    
    .main-content {
        margin-top: 100px;
    }
}

/* 表格样式 */
.table-container {
    overflow-x: auto;
    margin: 2rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: bold;
}

tr:hover {
    background-color: #f8f9fa;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 下载按钮特殊样式 */
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    margin: 0.5rem;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
}

.download-btn i {
    font-size: 1.2rem;
}

/* 联系表单样式 */
.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #333;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

/* 进度条 */
.progress-bar {
    width: 100%;
    height: 4px;
    background-color: #e9ecef;
    border-radius: 2px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
}

/* 图片展示区域样式 */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.gallery-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.gallery-item .gallery-content {
    padding: 1.5rem;
}

.gallery-item h4 {
    color: #667eea;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.gallery-item p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* 图片展示响应式设计 */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }
    
    .gallery-item img {
        height: 200px;
    }
    
    .gallery-item .gallery-content {
        padding: 1rem;
    }
    
    .gallery-item h4 {
        font-size: 1rem;
    }
    
    .gallery-item p {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .gallery-item img {
        height: 180px;
    }
}

/* 轮播图样式 */
.carousel-box {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
    margin: 0 auto;
    max-width: 100%;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
}

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

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

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

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.carousel-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    padding: 2rem;
    text-align: center;
    z-index: 10;
}

.carousel-caption h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.carousel-caption p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

/* 轮播图控制按钮 */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.8);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #333;
    transition: all 0.3s ease;
    z-index: 20;
}

.carousel-btn:hover {
    background: rgba(255,255,255,0.95);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

/* 轮播图指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 20;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

/* 轮播图响应式设计 */
@media (max-width: 768px) {
    .carousel-container {
        height: 350px;
    }
    
    .carousel-slide img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    
    .carousel-caption h3 {
        font-size: 1.5rem;
    }
    
    .carousel-caption p {
        font-size: 1rem;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
}

@media (max-width: 480px) {
    .carousel-container {
        height: 250px;
    }
    
    .carousel-slide img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
    
    .carousel-caption {
        padding: 1.5rem;
    }
    
    .carousel-caption h3 {
        font-size: 1.3rem;
    }
    
    .carousel-caption p {
        font-size: 0.9rem;
    }
    
    .carousel-btn {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
    
    .indicator {
        width: 10px;
        height: 10px;
    }
}