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

:root {
    --primary-color: #e60012;
    --secondary-color: #1a1a1a;
    --text-color: #333;
    --text-light: #666;
    --bg-light: #f5f5f5;
    --border-color: #ddd;
    --white: #ffffff;
}

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

/* 全局移除图片阴影 */
img {
    box-shadow: none !important;
}

/* 全局标题样式 - 带红色下划线 */
.section-title,
.section-title-new,
.section-title-centered,
.section-title-app,
.stats-title,
.services-section-title,
.industries-section-title,
.contact-section-title,
.about-stats-title,
.about-timeline-title,
.about-advantages-title,
.about-warehouse-title {
    position: relative;
    display: block;
    text-align: center;
    padding-bottom: 20px;
}

.section-title::after,
.section-title-new::after,
.section-title-centered::after,
.section-title-app::after,
.stats-title::after,
.services-section-title::after,
.industries-section-title::after,
.contact-section-title::after,
.about-stats-title::after,
.about-timeline-title::after,
.about-advantages-title::after,
.about-warehouse-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: #e60012;
}

/* 居中显示标题的容器 */
.section-title-new,
.section-title-centered,
.section-title-app,
.stats-title {
    left: auto;
    transform: none;
}

/* 白色标题样式 */
.section-title-white {
    color: #fff;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 导航栏 ===== */
.navbar {
    background: var(--secondary-color);
    color: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.navbar-brand .logo {
    height: 40px;
}

.navbar-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 14px;
}

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

.language-switcher {
    display: flex;
    gap: 10px;
    align-items: center;
}

.language-switcher a {
    color: var(--white);
    text-decoration: none;
}

.language-switcher a.active {
    color: var(--primary-color);
    font-weight: bold;
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.navbar-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
}

/* ===== 英雄区域 ===== */
.hero {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: #c00010;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: #333;
}

/* ===== 数据看板 ===== */
.stats-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

/* ===== 关于部分 ===== */
.about-section {
    padding: 80px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    align-items: start;
}

.about-left h2 {
    font-size: 32px;
    margin-bottom: 30px;
    line-height: 1.4;
}

.about-logo {
    max-width: 200px;
}

.about-right p {
    margin-bottom: 20px;
    line-height: 1.8;
}

/* ===== 产品网格 ===== */
.products-preview {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.product-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.product-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

.product-badges {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.badge {
    padding: 5px 10px;
    border-radius: 3px;
    font-size: 12px;
    font-weight: bold;
}

.badge-hot {
    background: var(--primary-color);
    color: var(--white);
}

.badge-eol {
    background: #ff9800;
    color: var(--white);
}

.badge-stock {
    background: #4caf50;
    color: var(--white);
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.product-model {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 15px;
}

/* ===== 合作伙伴 ===== */
.partners-section {
    padding: 80px 0;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    align-items: center;
}

.partner-item {
    text-align: center;
    padding: 20px;
}

.partner-item img {
    max-width: 100%;
    height: auto;
    filter: grayscale(100%);
    transition: filter 0.3s;
}

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

/* ===== 表单 ===== */
.inquiry-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.inquiry-form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
}

.form-group textarea {
    resize: vertical;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    margin-bottom: 15px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--secondary-color);
        flex-direction: column;
        padding: 20px;
        transition: left 0.3s;
    }
    
    .navbar-menu.active {
        left: 0;
    }
    
    .navbar-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .hero {
        height: 400px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 辅助类 ===== */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 40px;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ===== 分页 ===== */
.pagination-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

/* ===== 页面头部 ===== */
.page-header {
    background: var(--bg-light);
    padding: 40px 0;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 36px;
    text-align: center;
}

/* ===== 产品页面布局 ===== */
.products-section {
    padding: 40px 0;
}

.products-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 40px;
}

.products-sidebar {
    background: var(--bg-light);
    padding: 20px;
    border-radius: 10px;
    height: fit-content;
}

.sidebar-section {
    margin-bottom: 30px;
}

.sidebar-section h3 {
    margin-bottom: 15px;
    font-size: 18px;
}

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

.category-list li {
    margin-bottom: 10px;
}

.category-list a {
    color: var(--text-color);
    text-decoration: none;
    display: block;
    padding: 8px 12px;
    border-radius: 5px;
    transition: background 0.3s;
}

.category-list a:hover,
.category-list a.active {
    background: var(--white);
    color: var(--primary-color);
}

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

.filter-tag {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 14px;
    transition: all 0.3s;
}

.filter-tag:hover,
.filter-tag.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

@media (max-width: 768px) {
    .products-layout {
        grid-template-columns: 1fr;
    }
    
    .products-sidebar {
        position: sticky;
        top: 70px;
    }
}