/* ========== 重置和基础样式 ========== */
:root {
    --primary-blue: #1a5f9e;
    --secondary-blue: #2c80d0;
    --light-blue: #e8f2fc;
    --dark-blue: #0d3c6c;
    --white: #ffffff;
    --light-gray: #f5f7fa;
    --medium-gray: #6c757d;
    --dark-gray: #333333;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
    
    --transition: all 0.3s ease;
}

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

html, body {
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 80px;
    margin: 0;
    position: relative;
}

/* ========== 容器和布局 ========== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
    flex: 1;
}

main {
    padding-top: 0 !important;
    margin-top: 0 !important;
    position: relative;
    z-index: 1;
}

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    height: 80px;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0;
}

/* 标志 */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    height: 100%;
    padding: 10px 0;
}

.logo-icon {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-right: 12px;
}

.logo-icon-img {
    width: 50px;
    height: 50px;
    margin-right: 10px;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1.2;
}

.logo-subtitle {
    display: block;
    font-size: 0.85rem;
    color: var(--medium-gray);
    margin-top: 2px;
}

/* 导航菜单 */
.nav {
    display: flex;
    height: 100%;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    height: 100%;
    align-items: center;
}

.nav-item {
    margin-left: 35px;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    color: var(--dark-gray);
    font-weight: 600;
    text-decoration: none;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
    font-size: 1.05rem;
    height: 100%;
    display: flex;
    align-items: center;
}

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

.nav-link.active {
    color: var(--primary-blue) !important;
    position: relative;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-blue);
    border-radius: 2px;
    display: block !important;
    opacity: 1 !important;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--primary-blue);
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

/* ========== 搜索框样式 ========== */
.search-container {
    display: flex;
    align-items: center;
    margin-left: 30px;
}

.search-form {
    display: flex;
    align-items: center;
}

.search-input {
    padding: 8px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 20px;
    font-size: 0.95rem;
    width: 200px;
    transition: var(--transition);
    outline: none;
}

.search-input:focus {
    border-color: var(--primary-blue);
}

.search-btn {
    background: none;
    border: none;
    color: var(--primary-blue);
    font-size: 1.1rem;
    margin-left: -35px;
    cursor: pointer;
    padding: 5px;
}

/* 搜索弹窗 */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.search-box {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    text-align: center;
}

.search-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-submit {
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 12px 25px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.search-submit:hover {
    background-color: var(--dark-blue);
}

.close-search {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--white);
    font-size: 2rem;
    cursor: pointer;
}

.search-suggestions {
    text-align: left;
    margin-top: 20px;
    color: var(--medium-gray);
}

.search-tags {
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.search-tag {
    display: inline-block;
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid #c5d9f0;
    font-size: 0.9rem;
}

.search-tag:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

/* ========== Banner/Header样式 ========== */
.hero, .page-header {
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: var(--white);
    text-align: center;
    width: 100%;
    margin-top: 4px;
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    min-height: 300px;
    display: flex;
    align-items: center;
}

.hero.has-background-image {
    background: linear-gradient(135deg, rgba(26, 95, 158, 0.85), rgba(13, 60, 108, 0.85)), var(--hero-bg-image);
    background-blend-mode: overlay;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 1;
    display: none;
}

.hero.has-background-image .hero-overlay {
    display: block;
}

.hero .container,
.page-header .container {
    position: relative;
    z-index: 2;
}

.hero-title, .page-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--white) !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle, .page-subtitle {
    font-size: 1.3rem;
    max-width: 800px;
    margin: 0 auto 30px;
    opacity: 0.9;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.95) !important;
}

/* ========== 分区样式 ========== */
.section {
    padding: 30px 0;
    width: 100%;
}

.section-title {
    text-align: center;
 }

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 4px;
    background-color: var(--secondary-blue);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.section-title p {
    color: var(--medium-gray);
    max-width: 1000px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-block;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    padding: 12px 35px;
    font-size: 1rem;
    border-radius: 30px;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 1.1rem;
}

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

.btn-primary:hover {
    background-color: var(--dark-blue);
    border-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.btn-outline-primary:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Hero区域特殊按钮样式 */
.hero .btn-primary {
    background-color: var(--white);
    color: var(--primary-blue);
}

.hero .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--primary-blue);
    border-color: var(--white);
}

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

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

/* 通用CTA按钮 */
.cta-button {
    display: inline-block;
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 14px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: 2px solid var(--primary-blue);
}

.cta-button:hover {
    background-color: var(--dark-blue);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* ========== 分类/应用导航 ========== */
.category-nav, .application-nav {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
    flex-wrap: wrap;
    gap: 10px;
}

.category-btn, .application-nav a {
    background: var(--white);
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-decoration: none;
}

.category-btn:hover,
.category-btn.active,
.application-nav a:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(26, 95, 158, 0.2);
}

/* ========== 卡片通用样式 ========== */
.card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
}

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

/* 产品卡片 */
.product-card, .advantage-overview-card, .stat-card, .news-card, .brand-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
}

.product-card:hover,
.advantage-overview-card:hover,
.stat-card:hover,
.news-card:hover,
.brand-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* 产品展示网格 */
.product-grid, .advantages-overview-grid, .stats-grid, .team-grid, .news-grid, .brands-grid {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.product-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.advantages-overview-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

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

.news-grid {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

.brands-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    justify-items: center;
    align-items: center;
}

/* ========== 产品分类 ========== */
.product-category {
    margin-bottom: 30px;
    scroll-margin-top: 100px;
}

.category-title {
    font-size: 2.2rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid var(--light-blue);
}

.category-description {
    font-size: 1.1rem;
    color: var(--medium-gray);
    margin-bottom: 30px;
    line-height: 1.6;
}

/* ========== 表格样式 ========== */
.product-table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: var(--shadow-md);
    border-radius: 10px;
    overflow: hidden;
    font-size: 1rem;
}

.product-table thead {
    background-color: var(--primary-blue);
    color: var(--white);
}

.product-table th,
.product-table td {
    padding: 18px 15px;
    border: none;
}

.product-table th {
    text-align: left;
    font-weight: 600;
    font-size: 1.05rem;
    white-space: nowrap;
}

.product-table tbody tr {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: background-color 0.3s ease;
}

.product-table tbody tr:hover {
    background-color: var(--light-blue);
}

/* 列宽设置 */
.product-table th:nth-child(1),
.product-table td:nth-child(1) {
    width: 18%;
    min-width: 120px;
}

.product-table th:nth-child(2),
.product-table td:nth-child(2),
.product-table th:nth-child(3),
.product-table td:nth-child(3),
.product-table th:nth-child(4),
.product-table td:nth-child(4) {
    width: 15%;
    min-width: 100px;
    text-align: center;
}

.product-table th:nth-child(5),
.product-table td:nth-child(5) {
    width: 37%;
    min-width: 200px;
    text-align: left;
}

/* 特种PP表格的特殊列宽 */
#special .product-table th:nth-child(3),
#special .product-table td:nth-child(3) {
    width: 20%;
    min-width: 120px;
}

#special .product-table th:nth-child(5),
#special .product-table td:nth-child(5) {
    width: 32%;
}

/* 表格内容样式 */
.product-applications {
    color: var(--medium-gray);
    font-size: 0.95rem;
    line-height: 1.5;
}

.spec-value {
    font-weight: 600;
    color: var(--dark-blue);
    font-size: 1.05rem;
}

/* 表格行高亮效果 */
.product-row.highlighted {
    background-color: rgba(26, 95, 158, 0.1) !important;
    animation: highlightPulse 2s ease-in-out;
    position: relative;
}

.product-row.highlighted::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 5px;
    height: 100%;
    background-color: var(--primary-blue);
}

@keyframes highlightPulse {
    0% { background-color: rgba(26, 95, 158, 0.1); }
    50% { background-color: rgba(26, 95, 158, 0.2); }
    100% { background-color: rgba(26, 95, 158, 0.1); }
}

/* 表格条纹效果 */
.product-table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

.product-table tbody tr:nth-child(even):hover {
    background-color: var(--light-blue);
}

/* ========== 列表样式 ========== */
.features-list, .advantage-list {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 10px;
}

.features-list li,
.advantage-list li {
    padding: 8px 0;
    display: flex;
    align-items: flex-start;
}

.features-list li i,
.advantage-list li i {
    color: var(--secondary-blue);
    margin-right: 10px;
    margin-top: 3px;
    flex-shrink: 0;
}

/* ========== 特色内容区域 ========== */
.product-features {
    background-color: var(--light-blue);
    border-radius: 10px;
    padding: 30px;
    margin-top: 30px;
}

.product-inquiry {
    background-color: var(--light-gray);
    border-radius: 15px;
    padding: 50px;
    text-align: center;
    margin-top: 60px;
}

.product-features h3,
.product-inquiry h3 {
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.product-inquiry h3 {
    font-size: 1.8rem;
}

.product-inquiry p {
    color: var(--medium-gray);
    margin-bottom: 25px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ========== CTA卡片样式 ========== */
.cta-container {
    padding: 40px 0;
    background-color: var(--light-gray);
}

.cta-card-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.cta-card {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    border-radius: 16px;
    padding: 60px;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(26, 95, 158, 0.3);
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.6s ease;
}

.cta-card:hover::before {
    left: 100%;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.cta-card:hover .cta-title {
    transform: scale(1.02);
}

.cta-description {
    font-size: 1.3rem;
    opacity: 0.9;
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto 35px;
    color: rgba(255, 255, 255, 0.95);
}

/* ========== 产品卡片具体样式 ========== */
.product-showcase {
    background-color: var(--light-gray);
    padding: 30px 0;
}

.product-card {
    padding: 30px 20px;
    text-align: center;
    border-top: 5px solid var(--primary-blue);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    height: 100%;
}

.product-icon {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-name {
    font-size: 1.2rem;
    color: var(--dark-blue);
    margin-bottom: 15px;
    font-weight: 700;
    line-height: 1.2;
}

.product-description {
    color: var(--medium-gray);
    line-height: 1.2;
    margin-bottom: 10px;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0px;
    min-height: 70px;
}

.product-specs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    width: 100%;
    min-height: 80px;
}

.spec-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}


.spec-label {
    color: var(--medium-gray);
    font-size: 0.85rem;
    text-align: center;
    line-height: 1.3;
}

.product-link {
    display: inline-block;
    margin-top: auto;
    align-self: center;
}

/* ========== 公司优势卡片 ========== */
.advantage-overview-card {
    padding: 40px 30px;
    text-align: center;
    border-top: 5px solid var(--primary-blue);
    height: 100%;
}

.advantage-overview-card:hover {
    transform: translateY(-10px);
}

.advantage-overview-card .icon {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.advantage-overview-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-blue);
    font-weight: 600;
}

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

/* 核心竞争力卡片 */
.competitive-advantage {
    display: flex;
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    transition: var(--transition);
}

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

.advantage-visual {
    width: 40%;
    background: var(--light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 4rem;
    padding: 40px;
}

.advantage-content {
    width: 60%;
    padding: 40px;
}

.advantage-content h3 {
    font-size: 1.8rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-weight: 600;
}

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

/* ========== 统计数据 ========== */
.stats-section {
    background: var(--light-blue);
    padding: 80px 0;
    text-align: center;
}

.stat-card {
    padding: 40px 20px;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--medium-gray);
    font-weight: 600;
}

/* ========== 团队介绍 ========== */
.team-section {
    padding: 80px 0;
}

.team-member {
    text-align: center;
}

.team-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: var(--light-blue);
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 3.5rem;
    transition: var(--transition);
}

.team-member:hover .team-avatar {
    transform: scale(1.05);
    background: var(--primary-blue);
    color: var(--white);
}

.team-member h4 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 5px;
    font-weight: 600;
}

.team-position {
    color: var(--medium-gray);
    font-weight: 600;
    margin-bottom: 15px;
}

.team-bio {
    color: var(--medium-gray);
    font-size: 0.95rem;
    line-height: 1.5;
    padding: 10px
}

/* ========== About Us ========== */
.about-section {
    background-color: var(--light-gray);
    padding: 0px 0;
}

.about-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 3rem;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.about-image a {
    display: block;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.about-image a:hover img {
    transform: scale(1.03);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.about-image a::after {
    content: 'Learn more →';
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(26, 95, 158, 0.9);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.about-image a:hover::after {
    opacity: 1;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    padding: 50px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.about-content p {
    margin-bottom: 25px;
    line-height: 1.8;
    color: #444;
    font-size: 1.1rem;
    text-align: justify;
}

/* ========== 新闻/博客 ========== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.news-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    background-color: #f8f9fa;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
}

/* 针对宽图片的特殊处理 */
.news-image.wide-image img {
    object-fit: contain;
    background-color: #f8f9fa;
    object-position: center;
}

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

/* 如果使用contain，悬停时不缩放 */
.news-image.wide-image img:hover {
    transform: none;
}

.category-tag {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #1a5f9e;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    z-index: 2;
}

.news-content {
    padding: 25px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 14px;
    color: #666;
}

.news-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.news-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-title a {
    color: #333;
    text-decoration: none;
}

.news-title a:hover {
    color: #1a5f9e;
}

.news-excerpt {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.news-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.news-author {
    color: #888;
    font-size: 14px;
}

.read-more {
    color: #1a5f9e;
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    color: #14447a;
}

/* 分页 */
.pagination-wrapper {
    margin-top: 50px;
    text-align: center;
}

.pagination {
    display: inline-flex;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: 5px;
}

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

.page-link {
    padding: 10px 15px;
    border: 2px solid #e0e0e0;
    background: var(--white);
    color: var(--dark-gray);
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
}

.page-link:hover {
    background: var(--light-blue);
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

/* 置顶文章样式 */
.featured-news-section {
    background: linear-gradient(135deg, #fff9e6 0%, #fff5d9 100%);
    border-top: 3px solid #ffc107;
}

.featured-card {
    position: relative;
    border: 2px solid #ffc107;
}

.featured-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ffc107;
    color: #333;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
}

/* 文章详情 */
.article-header {
    background: var(--light-blue);
    padding: 40px 0 20px;
}

.breadcrumb-nav {
    margin-bottom: 20px;
}

.breadcrumb {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
    gap: 5px;
}

.breadcrumb-item {
    color: var(--medium-gray);
    font-size: 0.9rem;
}

.breadcrumb-item a {
    color: var(--primary-blue);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: var(--dark-gray);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    margin: 0 5px;
    color: var(--medium-gray);
}

.article-title-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.article-category {
    display: inline-block;
    background: var(--primary-blue);
    color: var(--white);
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.article-title {
    font-size: 2.5rem;
    color: var(--dark-gray);
    margin-bottom: 20px;
    line-height: 1.3;
}

.article-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    color: var(--medium-gray);
    font-size: 0.9rem;
}

.meta-item i {
    margin-right: 5px;
    width: 15px;
}

.article-featured-image {
    margin-bottom: 50px;
}

.article-featured-image img {
    width: 100%;
    max-height: 350px;
    object-fit: cover;
    border-radius: 8px;
}

.article-content-section {
    padding-top: 0;
}

.article-content {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.content-body {
    line-height: 1.8;
    color: var(--dark-gray);
}

.content-body h2,
.content-body h3,
.content-body h4 {
    color: var(--primary-blue);
    margin: 30px 0 15px;
}

.content-body p {
    margin-bottom: 20px;
}

.content-body ul,
.content-body ol {
    margin-bottom: 20px;
    padding-left: 20px;
}

.content-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
}

.content-body blockquote {
    border-left: 4px solid var(--primary-blue);
    padding-left: 20px;
    margin: 25px 0;
    color: var(--medium-gray);
    font-style: italic;
}

.article-tags {
    margin: 15px 0;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.article-tags h4 {
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    display: inline-block;
    padding: 6px 15px;
    background: var(--light-blue);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: var(--transition);
}

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

.article-share {
    margin: 40px 0;
    padding-top: 25px;
    border-top: 1px solid #eee;
}

.article-share h4 {
    margin-bottom: 15px;
    color: var(--dark-gray);
}

.share-buttons {
    display: flex;
    gap: 15px;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.share-btn.facebook {
    background: #1877F2;
}

.share-btn.twitter {
    background: #1DA1F2;
}

.share-btn.linkedin {
    background: #0077B5;
}

.share-btn.email {
    background: var(--medium-gray);
}

.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 侧边栏 */
.article-sidebar {
    padding-left: 30px;
}

.sidebar-section {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.sidebar-title {
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-size: 1.2rem;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-blue);
}

.related-articles-list,
.popular-articles-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.related-article,
.popular-article {
    display: flex;
    gap: 15px;
}

.related-image {
    width: 80px;
    height: 60px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
}

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

.related-content h4,
.popular-content h4 {
    margin-bottom: 5px;
    font-size: 0.95rem;
    line-height: 1.4;
}

.related-content h4 a,
.popular-content h4 a {
    color: var(--dark-gray);
    text-decoration: none;
    transition: var(--transition);
}

.related-content h4 a:hover,
.popular-content h4 a:hover {
    color: var(--primary-blue);
}

.related-meta,
.popular-meta {
    font-size: 0.8rem;
    color: var(--medium-gray);
}

.popular-number {
    width: 30px;
    height: 30px;
    background: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 5px;
}

.popular-content {
    flex: 1;
}

.popular-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 5px;
}


/* 文件下载样式 */
.article-download {
    margin: 10px 0;
    width: 500px;
    height: 200px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 10px;
    border-top: 5px solid var(--primary-blue);
}

.download-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.download-icon {
    color: var(--primary-blue);
}

.download-info {
    flex: 1;
}

.download-info h5 {
    margin-bottom: 10px;
    color: #333;
}

.file-details {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    color: #666;
    font-size: 0.9rem;
}

.file-type, .file-size {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.file-indicator {
    display: inline-block;
    background: var(--light-blue);
    color: var(--primary-blue);
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    margin-top: 10px;
}

/* ========== 品牌合作伙伴 ========== */
.brand-partners-section {
    padding: 10px 0;
    background-color: var(--light-gray);
}

.partners-header {
    text-align: center;
    margin-bottom: 10px;
}

.partners-header h2 {
    color: var(--primary-blue);
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.partners-header h2::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: var(--secondary-blue);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.partners-header p {
    color: var(--medium-gray);
    max-width: 700px;
    margin: 25px auto 0;
    font-size: 1.1rem;
    line-height: 1.6;
}

.brand-card {
    width: 100%;
    max-width: 180px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid rgba(232, 242, 252, 0.8);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    position: relative;
}

.brand-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.brand-logo {
    width: 100%;
    height: auto;
    max-height: 60px;
    object-fit: contain;
    filter: opacity(1);
    transition: var(--transition);
}

.brand-card:hover .brand-logo {
    filter: opacity(1) brightness(1.1);
    transform: scale(1.08);
}

/* 品牌名称提示 */
.brand-tooltip {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    white-space: nowrap;
    z-index: 10;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(26, 95, 158, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.brand-tooltip::after {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid var(--primary-blue);
}

.brand-card:hover .brand-tooltip {
    opacity: 1;
    visibility: visible;
    bottom: -15px;
    transform: translateX(-50%) translateY(-5px);
}

/* 合作伙伴统计 */
.partners-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
    padding-top: 10px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    min-width: 150px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.stat-number .plus {
    font-size: 1.8rem;
    font-weight: 400;
}

.stat-label {
    color: var(--medium-gray);
    font-size: 1rem;
    font-weight: 600;
}

/* 淡入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.brand-card {
    animation: fadeIn 0.5s ease forwards;
}

/* 为每个品牌卡片添加延迟动画 */
.brand-card:nth-child(1) { animation-delay: 0.05s; }
.brand-card:nth-child(2) { animation-delay: 0.1s; }
.brand-card:nth-child(3) { animation-delay: 0.15s; }
.brand-card:nth-child(4) { animation-delay: 0.2s; }
.brand-card:nth-child(5) { animation-delay: 0.25s; }
.brand-card:nth-child(6) { animation-delay: 0.3s; }
.brand-card:nth-child(7) { animation-delay: 0.35s; }
.brand-card:nth-child(8) { animation-delay: 0.4s; }
.brand-card:nth-child(9) { animation-delay: 0.45s; }
.brand-card:nth-child(10) { animation-delay: 0.5s; }
.brand-card:nth-child(11) { animation-delay: 0.55s; }
.brand-card:nth-child(12) { animation-delay: 0.6s; }
.brand-card:nth-child(13) { animation-delay: 0.65s; }
.brand-card:nth-child(14) { animation-delay: 0.7s; }

/* ========== 浮动按钮样式 ========== */
.floating-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.floating-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.floating-btn:hover {
    background-color: var(--dark-blue);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

/* WhatsApp浮动按钮样式 */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25D366;
    color: var(--white);
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.whatsapp-float:hover {
    background-color: #128C7E;
    transform: scale(1.1);
    box-shadow: 3px 3px 15px rgba(0, 0, 0, 0.4);
}

.whatsapp-float .fa-whatsapp {
    font-size: 36px;
}

.whatsapp-tooltip {
    position: absolute;
    right: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: #333;
    color: var(--white);
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.whatsapp-float:hover .whatsapp-tooltip {
    opacity: 1;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    border: 2px solid var(--white);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-blue);
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

/* ========== 页脚样式 ========== */
.footer {
    background-color: var(--dark-gray);
    color: var(--white);
    padding: 60px 0 30px;
    margin-top: auto;
    width: 100%;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--light-blue);
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 3px;
    background-color: var(--secondary-blue);
    bottom: 0;
    left: 0;
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

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

.footer-column ul li a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.contact-info {
    list-style: none;
    padding: 0;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.contact-info li i {
    margin-right: 10px;
    color: var(--secondary-blue);
    width: 20px;
    flex-shrink: 0;
    margin-top: 3px;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #aaa;
    font-size: 0.9rem;
    width: 100%;
}

/* ========== 响应式设计 ========== */
/* 桌面端特定样式 */
@media (min-width: 769px) {
    .nav-list {
        display: flex !important;
        flex-direction: row !important;
    }
    
    .nav {
        display: block !important;
        position: static !important;
        background-color: transparent !important;
        box-shadow: none !important;
        padding: 0 !important;
    }
    
    .mobile-menu-btn {
        display: none !important;
    }
}

/* 大屏幕响应式 (1200px以下) */
@media (max-width: 1200px) {
    .brands-grid {
        grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
        gap: 25px;
    }
    
    .brand-card {
        max-width: 160px;
        height: 110px;
        padding: 15px;
    }
    
    .brand-logo {
        max-height: 55px;
    }
    
    .brand-card:hover .brand-tooltip {
        bottom: -12px;
    }
}

/* 中等屏幕响应式 (992px以下) */
@media (max-width: 992px) {
    .about-content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-image {
        order: 2;
    }
    
    .about-text {
        order: 1;
    }
    
    .brand-partners-section,
    .section,
    .cta-container,
    .product-showcase,
    .stats-section,
    .team-section,
    .about-section {
        padding: 20px 0;
    }
    
    .partners-header h2 {
        font-size: 2.2rem;
    }
    
    .brands-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 20px;
    }
    
    .brand-card {
        max-width: 140px;
        height: 100px;
        padding: 12px;
    }
    
    .brand-logo {
        max-height: 50px;
    }
    
    .brand-card:hover .brand-tooltip {
        bottom: -10px;
    }
    
    .partners-stats {
        gap: 30px;
        margin-top: 50px;
    }
    
    .stat-item {
        min-width: 120px;
    }
    
    .stat-number {
        font-size: 2.2rem;
    }
    
    .article-sidebar {
        padding-left: 0;
        margin-top: 40px;
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 25px;
    }
}

/* 平板/小屏幕响应式 (768px以下) */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
    
    .header {
        height: 70px;
        padding: 0 15px;
    }
    
    .header-container,
    .container {
        padding: 0 15px;
    }
    
    .logo-icon {
        font-size: 2rem;
    }
    
    .logo-text {
        font-size: 1.4rem;
    }
    
    .logo-subtitle {
        font-size: 0.75rem;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: var(--white);
        box-shadow: var(--shadow-md);
        transition: left 0.3s ease;
        padding: 20px 0;
        z-index: 999;
        height: auto;
        flex-direction: column;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        height: auto;
    }
    
    .nav-item {
        margin: 15px 0;
        height: auto;
    }
    
    .nav-link {
        padding: 10px 0;
        height: auto;
    }
    
    .nav-link.active::after {
        bottom: 5px;
    }
    
    .search-container {
        display: none;
    }
    
    .hero-title, .page-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle, .page-subtitle {
        font-size: 1.1rem;
        padding: 0 15px;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .competitive-advantage {
        flex-direction: column;
    }
    
    .advantage-visual,
    .advantage-content {
        width: 100%;
    }
    
    .advantage-visual {
        padding: 30px;
        font-size: 3rem;
    }
    
    .advantage-content {
        padding: 30px;
    }
    
    .stats-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .product-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
    
    .product-card,
    .news-card,
    .article-content {
        padding: 30px 20px;
    }
    
    .product-name {
        font-size: 1.4rem;
    }
    
    .product-description {
        min-height: 70px;
        font-size: 0.95rem;
    }
    
    .product-specs {
        gap: 15px;
        min-height: 90px;
    }
    
    .spec-value {
        font-size: 1.1rem;
    }
    
    .spec-label {
        font-size: 0.8rem;
    }
    
    .partners-header h2 {
        font-size: 2rem;
    }
    
    .partners-header p {
        font-size: 1rem;
        padding: 0 15px;
    }
    
    .brands-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
        padding: 0 15px;
    }
    
    .brand-card {
        max-width: 100%;
        height: 90px;
        padding: 10px;
    }
    
    .brand-logo {
        max-height: 45px;
    }
    
    .partners-stats {
        gap: 20px;
        margin-top: 40px;
        padding-top: 30px;
    }
    
    .stat-item {
        min-width: 100px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .brand-tooltip {
        display: none;
    }
    
    .brand-card:hover .brand-tooltip {
        display: none;
    }
    
    .cta-card {
        padding: 40px 25px;
        margin: 0 15px;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-description {
        font-size: 1.1rem;
        padding: 0 10px;
    }
    
    .cta-button {
        padding: 12px 35px;
        font-size: 1.1rem;
    }
    
    .product-table-container {
        overflow-x: auto;
        margin: 20px -15px;
        padding: 0 15px;
    }
    
    .product-table {
        min-width: 800px;
        font-size: 0.9rem;
        margin: 0;
    }
    
    .product-table th,
    .product-table td {
        padding: 12px 10px;
    }
    
    .product-table th:nth-child(1),
    .product-table td:nth-child(1) {
        min-width: 100px;
    }
    
    .product-table th:nth-child(5),
    .product-table td:nth-child(5) {
        min-width: 180px;
    }
    
    #special .product-table th:nth-child(3),
    #special .product-table td:nth-child(3) {
        min-width: 100px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-image {
        height: 200px;
    }
    
    .news-content {
        padding: 20px;
    }
    
    .article-title {
        font-size: 1.8rem;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    
    
    .share-buttons {
        justify-content: center;
    }
    
    .category-list {
        justify-content: center;
    }
    
    .download-card {
        flex-direction: column;
        text-align: center;
    }
    
    .file-details {
        justify-content: center;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 30px;
        right: 30px;
    }
    
    .whatsapp-float .fa-whatsapp {
        font-size: 30px;
    }
}

/* 手机/小屏幕响应式 (576px以下) */
@media (max-width: 576px) {
    .stats-grid,
    .team-grid,
    .brands-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .brand-card {
        height: 85px;
    }
    
    .brand-logo {
        max-height: 40px;
    }
    
    .partners-stats {
        flex-direction: column;
        gap: 25px;
    }
    
    .stat-item {
        min-width: auto;
    }
    
    .product-table {
        min-width: 700px;
    }
    
    .product-table th,
    .product-table td {
        padding: 10px 8px;
    }
    
    .product-name {
        font-size: 0.95rem;
    }
    
    .product-applications {
        font-size: 0.85rem;
    }
    
    .cta-card {
        padding: 30px 20px;
    }
    
    .cta-title {
        font-size: 1.7rem;
    }
    
    .cta-description {
        font-size: 1rem;
    }
    
    .news-image {
        height: 180px;
    }
    
    .news-meta {
        flex-direction: column;
        gap: 8px;
    }
    
    .news-footer {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
        
    .article-title {
        font-size: 1.6rem;
    }
}