/* ========================================
   中恒重工官网 - 全局样式
   ======================================== */

/* CSS变量定义 */
:root {
    --primary-color: #ff6b00;
    --primary-dark: #e55a00;
    --primary-light: #ff8533;
    --dark-bg: #1a1a1a;
    --dark-secondary: #252525;
    --light-bg: #f5f6fa;
    --white: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --text-light: #888888;
    --gradient-primary: linear-gradient(135deg, #ff6b00 0%, #ff8533 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #252525 100%);
    --box-shadow: 0 10px 40px rgba(255, 107, 0, 0.15);
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

/* 页面加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 为页面元素添加动画类 */
.animate-fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* 为导航栏添加滚动效果 */
.header.scroll {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    padding: 8px 0;
}

/* 为按钮添加更多动画效果 */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.btn:focus:not(:active)::before {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 13px 30px;
    border-radius: 5px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 0, 0.35);
}

.btn-secondary {
    background: var(--dark-bg);
    color: white;
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 11px 28px;
}

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

.btn-large {
    padding: 16px 40px;
    font-size: 16px;
}

/* 页面区块 */
.section {
    padding: 100px 0;
}

/* 区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ========================================
   导航栏样式
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 28px;
}

.navbar .nav-list {
    display: flex;
    gap: 30px;
}

.navbar .nav-list a {
    font-size: 15px;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.navbar .nav-list a:hover,
.navbar .nav-list a.active {
    color: var(--primary-color);
}

.navbar .nav-list a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.header-actions {
    margin-left: 20px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 24px;
    cursor: pointer;
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://images.unsplash.com/photo-1581091226825-a6a2a5aee158?auto=format&fit=crop&w=1920&q=60') center/cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(37, 37, 37, 0.85) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 700;
    color: white;
    margin-bottom: 25px;
    line-height: 1.3;
}

.hero-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
}

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

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.hero-scroll i {
    font-size: 28px;
    color: var(--primary-color);
}

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

/* ========================================
   数据统计
   ======================================== */
.stats-section {
    background: var(--gradient-primary);
    padding: 60px 0;
}

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

.stat-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
}

.stat-icon i {
    font-size: 24px;
    color: white;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: white;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
}

/* ========================================
   产品展示
   ======================================== */
.products-section {
    background: var(--white);
}

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

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

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

.product-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.product-content {
    padding: 25px;
}

.product-tag {
    display: inline-block;
    padding: 5px 12px;
    background: var(--primary-color);
    color: white;
    border-radius: 15px;
    font-size: 12px;
    margin-bottom: 12px;
}

.product-content h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.product-content > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 15px;
    line-height: 1.6;
}

.product-features {
    margin-bottom: 20px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 6px;
}

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

/* ========================================
   关于我们
   ======================================== */
.about-section {
    background: var(--light-bg);
}

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

.about-content h2 {
    font-size: 36px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.about-content .tagline {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 25px;
}

.about-content > p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-list {
    margin: 25px 0;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.about-list i {
    color: var(--primary-color);
}

.about-image img {
    border-radius: 15px;
    box-shadow: var(--box-shadow);
}

/* ========================================
   技术优势
   ======================================== */
.technology-section {
    background: var(--white);
}

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

.tech-card {
    text-align: center;
    padding: 35px 25px;
    background: var(--light-bg);
    border-radius: 15px;
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.tech-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 32px;
    color: white;
}

.tech-card h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.tech-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========================================
   解决方案分类
   ======================================== */
.solution-categories {
    background: var(--white);
    padding: 60px 0;
}

.category-tabs {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.category-tab {
    padding: 14px 28px;
    border: none;
    background: var(--light-bg);
    border-radius: 30px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-tab:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
}

.category-tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
}

.category-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

.category-tab:hover::before {
    left: 100%;
}

/* ========================================
   解决方案
   ======================================== */
.solutions-section {
    background: var(--light-bg);
}

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

.solution-card {
    background: white;
    padding: 35px 30px;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

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

.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

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

.solution-card:hover .solution-icon {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(255, 107, 0, 0.3);
}

.solution-card h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 600;
}

.solution-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 25px;
}

.solution-features,
.solution-tech,
.solution-benefits {
    margin-bottom: 20px;
    text-align: left;
}

.solution-features h4,
.solution-tech h4,
.solution-benefits h4 {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 500;
}

.solution-features ul,
.solution-tech ul,
.solution-benefits ul {
    list-style: none;
}

.solution-features li,
.solution-tech li,
.solution-benefits li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
}

.solution-features li i,
.solution-tech li i,
.solution-benefits li i {
    color: var(--primary-color);
    font-size: 12px;
}

.solution-card .btn-outline {
    margin-top: 15px;
    transition: var(--transition);
}

.solution-card .btn-outline:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
}

/* ========================================
   成功案例
   ======================================== */
.case-studies {
    background: var(--white);
}

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

.case-study {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    position: relative;
}

.case-study::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.case-study:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.case-image {
    position: relative;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.case-content {
    padding: 30px;
}

.case-content h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 600;
}

.case-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.case-result {
    margin-top: 20px;
}

.case-result h4 {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 12px;
    font-weight: 500;
}

.case-result ul {
    list-style: none;
}

.case-result li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
}

.case-result li i {
    color: var(--primary-color);
    font-size: 12px;
}

/* ========================================
   常见问题
   ======================================== */
.faq-section {
    background: var(--light-bg);
}

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

.faq-item {
    margin-bottom: 15px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    background: white;
}

.faq-question {
    padding: 20px 25px;
    background: white;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
}

.faq-question:hover {
    background: #f9f9f9;
}

.faq-question::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

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

.faq-answer {
    padding: 0 25px 20px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    display: none;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   联系我们
   ======================================== */
.contact-section {
    background: var(--white);
}

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

.contact-info {
    background: var(--light-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-item i {
    color: var(--primary-color);
    font-size: 20px;
    margin-top: 2px;
}

.contact-item span {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.contact-form {
    background: var(--light-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-primary);
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn-primary {
    width: 100%;
    margin-top: 10px;
}

/* ========================================
   客户案例
   ======================================== */
.cases-section {
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.case-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 30px 20px;
    background: var(--light-bg);
    border-radius: 10px;
    transition: var(--transition);
}

.case-logo:hover {
    background: white;
    box-shadow: var(--box-shadow);
    transform: translateY(-5px);
}

.case-logo i {
    font-size: 36px;
    color: var(--text-light);
}

.case-logo span {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   新闻过滤和搜索
   ======================================== */
.news-filter {
    background: var(--white);
    padding: 40px 0;
}

.filter-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.news-search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border: 1px solid #e0e0e0;
    border-radius: 30px;
    font-size: 14px;
    transition: var(--transition);
    background: var(--light-bg);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
    background: white;
}

.search-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-50%) scale(1.05);
}

.news-categories {
    display: flex;
    gap: 10px;
}

.category-btn {
    padding: 12px 20px;
    border: 1px solid #e0e0e0;
    background: white;
    border-radius: 25px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.category-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.category-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
}

/* ========================================
   特色资讯
   ======================================== */
.featured-news {
    background: var(--white);
    padding: 80px 0;
}

.featured-news h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 40px;
    text-align: center;
    font-weight: 600;
}

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

.featured-news-item {
    display: flex;
    gap: 30px;
    background: var(--light-bg);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

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

.featured-news-item .news-image {
    flex: 0 0 300px;
}

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

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

.featured-news-item .news-content {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-news-item .news-title {
    font-size: 22px;
    color: var(--text-primary);
    margin-bottom: 15px;
    line-height: 1.4;
    font-weight: 600;
    transition: var(--transition);
}

.featured-news-item:hover .news-title {
    color: var(--primary-color);
}

.featured-news-item .news-excerpt {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.featured-news-item .read-more {
    margin-top: auto;
}

/* ========================================
   新闻动态
   ======================================== */
.news-section {
    background: var(--light-bg);
}

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

.news-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    position: relative;
}

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

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.news-image {
    position: relative;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.news-content {
    padding: 30px;
}

.news-category {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 12px;
}

.category-company {
    background: rgba(255, 107, 0, 0.1);
    color: var(--primary-color);
}

.category-industry {
    background: rgba(0, 123, 255, 0.1);
    color: #007bff;
}

.category-technology {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

.category-event {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

.news-date {
    display: block;
    color: var(--text-light);
    font-size: 13px;
    margin-bottom: 12px;
}

.news-content h3 {
    font-size: 19px;
    color: var(--text-primary);
    margin-bottom: 15px;
    line-height: 1.4;
    font-weight: 600;
    transition: var(--transition);
}

.news-card:hover h3 {
    color: var(--primary-color);
}

.news-excerpt {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.read-more {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--primary-dark);
    transform: translateX(5px);
}

.read-more i {
    font-size: 12px;
    transition: var(--transition);
}

.read-more:hover i {
    transform: translateX(3px);
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
}

.page-link {
    padding: 10px 16px;
    border: 1px solid #e0e0e0;
    background: white;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: pointer;
}

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

.page-link.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
}

.page-link:first-child,
.page-link:last-child {
    font-weight: 500;
}

/* ========================================
   订阅资讯
   ======================================== */
.subscribe-section {
    background: var(--gradient-primary);
    padding: 80px 0;
    text-align: center;
}

.subscribe-content {
    max-width: 600px;
    margin: 0 auto;
}

.subscribe-content h2 {
    font-size: 32px;
    color: white;
    margin-bottom: 15px;
    font-weight: 600;
}

.subscribe-content > p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 30px;
    font-size: 16px;
}

.subscribe-form {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.subscribe-input {
    flex: 1;
    min-width: 300px;
    padding: 15px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    outline: none;
}

.subscribe-note {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
}

/* ========================================
   CTA 区域
   ======================================== */
.cta {
    background: var(--gradient-dark);
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    color: white;
    margin-bottom: 15px;
}

.cta-content > p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
}

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

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--dark-bg);
    padding: 80px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}

.footer-logo i {
    color: var(--primary-color);
}

.footer-col > p {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
}

.footer-col h4 {
    font-size: 16px;
    color: white;
    margin-bottom: 25px;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-contact i {
    color: var(--primary-color);
    margin-top: 3px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .products-grid,
    .tech-grid,
    .solutions-grid,
    .cases-grid,
    .case-studies-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .category-tabs {
        gap: 10px;
    }
    
    .category-tab {
        padding: 12px 20px;
        font-size: 13px;
    }
}

@media (max-width: 768px) {
    .navbar .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }
    
    .navbar .nav-list.active {
        display: flex;
    }
    
    .header-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 15px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .solution-categories {
        padding: 40px 0;
    }
    
    .category-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .category-tab {
        width: 80%;
        text-align: center;
    }
    
    .products-grid,
    .tech-grid,
    .solutions-grid,
    .cases-grid,
    .case-studies-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-card {
        padding: 25px 20px;
    }
    
    .case-content {
        padding: 20px;
    }
    
    .faq-question {
        padding: 15px 20px;
        font-size: 15px;
    }
    
    .faq-answer {
        padding: 0 20px 15px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-info,
    .contact-form {
        padding: 30px;
    }
    
    /* 新闻页面响应式 */
    .filter-wrapper {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
    }
    
    .news-search {
        max-width: 100%;
    }
    
    .news-categories {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .featured-news-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .featured-news-item {
        flex-direction: column;
    }
    
    .featured-news-item .news-image {
        flex: 0 0 200px;
    }
    
    .featured-news-item .news-content {
        padding: 30px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .subscribe-form {
        flex-direction: column;
        align-items: stretch;
    }
    
    .subscribe-input {
        min-width: 100%;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* 图片高度自适应 */
img {
    height: auto;
}