/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1e3c72;
    --secondary-color: #2a5298;
    --accent-color: #e74c3c;
    --text-dark: #333;
    --text-light: #333;
    --text-lightest: #999;
    --bg-light: #f5f6fa;
    --border-color: #e1e5eb;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fff;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 10px 25px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    color: #fff;
}

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

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

.btn-block {
    display: block;
    width: 100%;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 16px;
}

/* ===== 头部样式 ===== */
.header {
    background: #fff;
    box-shadow: var(--shadow);
    position: relative;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo img {
    height: 40px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    z-index: 999;
}

.mobile-menu a {
    display: block;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
    text-align: center;
}

.mobile-menu a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.mobile-menu.show {
    display: block;
}

/* ===== Banner样式 ===== */
.banner {
    position: relative;
    height: 500px;
    overflow: hidden;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #1e3c72 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner .container {
    text-align: center;
    color: #fff;
    position: relative;
    z-index: 2;
}

.banner .container h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.banner .container p {
    font-size: 20px;
    margin-bottom: 30px;
    color: rgba(255,255,255,0.9);
}

.banner .container .btn {
    background: #fff;
    color: #1e3c72;
}

.banner .container .btn:hover {
    background: #f0f0f0;
    color: #1e3c72;
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

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

.dot.active,
.dot:hover {
    background: #fff;
    transform: scale(1.2);
}

/* ===== Section通用样式 ===== */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

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

.section-footer {
    text-align: center;
    margin-top: 40px;
}

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-align: center;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.about-features {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.feature-item {
    text-align: center;
}

.feature-icon {
    display: block;
    font-size: 36px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

/* ===== 首页统计数据横向排列 ===== */
.features {
    display: flex;
    gap: 40px;
    margin-bottom: 20px;
    justify-content: center;
}

.features .feature-item {
    text-align: center;
    padding: 15px 25px;
    background: var(--bg-light);
    border-radius: 8px;
    min-width: 120px;
}

.features .feature-icon {
    display: block;
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

/* ===== 产品展示 ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.product-image {
    position: relative;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    overflow: hidden;
}

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

.product-placeholder {
    color: var(--text-lightest);
    font-size: 14px;
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--accent-color);
    color: #fff;
    padding: 3px 10px;
    border-radius: 3px;
    font-size: 12px;
}

.product-info {
    padding: 20px;
}

.product-category {
    font-size: 12px;
    color: var(--primary-color);
}

.product-info h3 {
    font-size: 16px;
    margin: 5px 0 10px;
}

.product-info h3 a {
    color: var(--text-dark);
}

.product-info h3 a:hover {
    color: var(--primary-color);
}

.product-model,
.product-material {
    font-size: 13px;
    color: var(--text-light);
    margin: 3px 0;
}

/* ===== 服务优势 ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.service-card {
    text-align: center;
    padding: 40px 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    font-size: 24px;
    font-weight: bold;
    line-height: 60px;
    border-radius: 50%;
}

.service-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

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

/* ===== 资讯 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.news-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    align-items: stretch;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.news-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(30, 60, 114, 0.15);
    transform: translateY(-3px);
}

.news-image {
    width: 200px;
    height: auto;
    flex-shrink: 0;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.news-placeholder {
    color: #fff;
    font-size: 14px;
}

.news-info {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-date {
    font-size: 12px;
    color: var(--text-lightest);
}

.news-info h3 {
    font-size: 16px;
    margin: 10px 0;
}

.news-info h3 a {
    color: var(--text-dark);
}

.news-info p {
    color: var(--text-light);
    font-size: 13px;
    margin-bottom: 10px;
}

/* ===== 联系页面 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form-box {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-form-box h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.contact-form-box .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.contact-form-box input,
.contact-form-box textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-dark);
    background: #fff;
    transition: border-color 0.3s, box-shadow 0.3s;
    margin-bottom: 15px;
}

.contact-form-box input:focus,
.contact-form-box textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 60, 114, 0.1);
}

.contact-form-box input::placeholder,
.contact-form-box textarea::placeholder {
    color: var(--text-lightest);
}

.contact-form-box textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form-box button {
    width: 100%;
    padding: 12px 25px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.3s;
}

.contact-form-box button:hover {
    background: var(--secondary-color);
}

.contact-item {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: #fff;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    margin-bottom: 5px;
}

.contact-item p {
    color: var(--text-light);
    font-size: 13px;
}

/* ===== 页面头部 ===== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 16px;
    opacity: 0.9;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    background: var(--bg-light);
    padding: 15px 0;
    font-size: 13px;
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb span {
    color: var(--text-dark);
}

/* ===== 产品列表页 ===== */
.products-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
}

.products-sidebar {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.filter-box h3 {
    font-size: 16px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 15px;
}

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

.category-list a {
    display: block;
    padding: 8px 15px;
    color: var(--text-dark);
    border-radius: 4px;
    transition: all 0.3s;
}

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

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

.no-data {
    text-align: center;
    padding: 60px;
    color: var(--text-light);
}

/* ===== 产品详情页 ===== */
.product-detail {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 50px;
    margin-bottom: 60px;
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.gallery-main {
    width: 100%;
    height: 400px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin-bottom: 15px;
}

.gallery-placeholder {
    color: var(--text-lightest);
}

.gallery-thumbs {
    display: flex;
    gap: 10px;
}

.gallery-thumbs .thumb {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.3s;
}

.gallery-thumbs .thumb:hover,
.gallery-thumbs .thumb.active {
    opacity: 1;
}

.product-info-detail {
    padding-top: 20px;
}

.product-category-tag {
    display: inline-block;
    padding: 5px 15px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 3px;
    font-size: 12px;
}

.product-info-detail h1 {
    font-size: 28px;
    margin: 15px 0;
}

.product-model-detail {
    color: var(--text-light);
    font-size: 16px;
}

.product-meta {
    margin: 20px 0;
    padding: 15px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.meta-item {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.meta-label {
    color: var(--text-light);
}

.product-params {
    margin: 20px 0;
}

.param-item {
    display: flex;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border-color);
}

.param-label {
    width: 100px;
    color: var(--text-light);
}

.product-contact {
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
}

.product-contact p {
    margin-bottom: 10px;
}

.contact-phone {
    font-size: 20px;
    color: var(--accent-color);
    font-weight: bold;
}

/* ===== 产品内容 ===== */
.product-content {
    margin-bottom: 60px;
}

.content-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 30px;
}

.tab-btn {
    padding: 15px 30px;
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

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

.tab-content {
    display: none;
}

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

.tab-content h3 {
    font-size: 18px;
    margin-bottom: 20px;
}

.content-text {
    color: var(--text-light);
    line-height: 1.8;
}

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

.feature-list li {
    padding: 10px 15px;
    background: var(--bg-light);
    border-radius: 4px;
    position: relative;
    padding-left: 30px;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 10px;
    color: var(--primary-color);
    font-weight: bold;
}

/* ===== 相关产品 ===== */
.related-products h3 {
    font-size: 20px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

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

/* ===== 资讯列表页 ===== */
.news-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
}

.news-sidebar {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    display: flex;
    gap: 20px;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.news-item:hover {
    transform: translateX(5px);
}

.news-thumb {
    width: 250px;
    flex-shrink: 0;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.news-thumb-placeholder {
    color: var(--text-lightest);
    font-size: 14px;
}

.news-content {
    padding: 20px;
    flex: 1;
}

.news-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: var(--text-lightest);
}

.news-category {
    color: var(--primary-color);
}

.read-more {
    font-size: 13px;
}

/* ===== 资讯详情页 ===== */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

.article-main {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.article-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.article-category {
    display: inline-block;
    padding: 5px 15px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 3px;
    font-size: 12px;
    margin-bottom: 15px;
}

.article-header h1 {
    font-size: 28px;
    margin-bottom: 15px;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    color: var(--text-light);
    font-size: 13px;
}

.article-cover {
    margin-bottom: 30px;
    border-radius: 8px;
    overflow: hidden;
}

.article-content {
    line-height: 1.8;
    color: var(--text-light);
}

.article-content p:empty,
.article-content p:has(br:only-child) {
    display: none;
    margin: 0 !important;
    padding: 0 !important;
    height: 0 !important;
    line-height: 0 !important;
}

.article-content img {
    display: block;
    max-width: 100%;
    margin: 15px auto;
    border-radius: 8px;
}

.article-content p {
    margin-bottom: 15px;
    text-indent: 2em;
}

.article-content p + img {
    margin-top: 0;
}

.article-content img + p {
    margin-top: 5px;
}

.article-content h2,
.article-content h3 {
    color: var(--text-dark);
    margin: 25px 0 15px;
}

.article-content ul,
.article-content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.article-source {
    color: var(--text-light);
}

.article-share button {
    padding: 5px 10px;
    margin-left: 10px;
    background: var(--bg-light);
    border: none;
    border-radius: 3px;
    cursor: pointer;
}

.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-box {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.sidebar-box h4 {
    font-size: 16px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 15px;
}

.related-list li {
    margin-bottom: 15px;
}

.related-list a {
    display: flex;
    gap: 10px;
    color: var(--text-dark);
}

.related-list img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
}

.related-list span {
    flex: 1;
    font-size: 13px;
}

.contact-list li {
    margin-bottom: 10px;
    font-size: 13px;
}

/* ===== 联系详情页 ===== */
.contact-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-bottom: 60px;
}

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

.info-card {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 8px;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: #fff;
    text-align: center;
    line-height: 50px;
    font-size: 20px;
    border-radius: 50%;
    flex-shrink: 0;
}

.info-content h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.info-content p {
    color: var(--text-light);
}

.contact-form-full {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-form-full h3 {
    font-size: 20px;
    margin-bottom: 25px;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.required {
    color: var(--accent-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
}

.form-group textarea {
    resize: vertical;
}

.map-section {
    margin-top: 60px;
}

.map-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

.map-placeholder {
    height: 400px;
    background: var(--bg-light);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.map-tip {
    margin-top: 10px;
    color: var(--primary-color);
}

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

.page-btn {
    padding: 8px 15px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-dark);
}

.page-btn:hover,
.page-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ===== 关于页面 ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
}

.about-main h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.about-desc {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-main h3 {
    font-size: 20px;
    margin: 30px 0 20px;
}

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

.advantage-item {
    padding: 25px;
    background: var(--bg-light);
    border-radius: 8px;
}

.advantage-icon {
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.advantage-item h4 {
    font-size: 16px;
    margin-bottom: 10px;
}

.advantage-item p {
    color: var(--text-light);
    font-size: 13px;
}

.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ===== 统计数据 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 10px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--text-dark);
    color: #fff;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
}

.footer-col p {
    color: rgba(255,255,255,0.7);
    font-size: 13px;
    margin-bottom: 10px;
}

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

.footer-col a {
    color: rgba(255,255,255,0.7);
    font-size: 13px;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .product-grid,
    .service-grid,
    .products-grid,
    .related-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-grid,
    .contact-grid,
    .contact-detail,
    .about-grid,
    .about-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .article-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .banner {
        height: 350px;
    }

    .banner .container h1 {
        font-size: 28px;
    }

    .banner .container p {
        font-size: 16px;
    }

    .section {
        padding: 50px 0;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .products-layout,
    .news-layout {
        grid-template-columns: 1fr;
    }

    .products-sidebar,
    .news-sidebar {
        display: none;
    }

    .product-grid,
    .service-grid,
    .products-grid,
    .related-grid,
    .news-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .news-item {
        flex-direction: column;
    }

    .news-thumb {
        width: 100%;
        height: 200px;
    }

    /* 手机端公司名称自动适应字体大小 */
    .about-text h3 {
        font-size: clamp(12px, 6vw, 28px);
        white-space: nowrap;
    }

    /* 手机端特色数据横向排列 */
    .features {
        flex-direction: row;
        justify-content: center;
        gap: 8px;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 5px;
    }

    .features .feature-item {
        min-width: unset;
        flex: 0 0 auto;
        padding: 8px 10px;
        background: var(--bg-light);
        border-radius: 6px;
    }

    .features .feature-icon {
        font-size: 18px;
        display: block;
        margin-bottom: 2px;
    }

    .features .feature-item > span:last-child {
        font-size: 10px;
        white-space: nowrap;
    }

    .about-features {
        flex-direction: column;
        gap: 20px;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

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

    .feature-list {
        grid-template-columns: 1fr;
    }

    .gallery-main {
        height: 300px;
    }

    .gallery-thumbs {
        justify-content: center;
    }

    .contact-form-box .form-row {
        grid-template-columns: 1fr;
    }

    /* 资讯卡片手机端布局 - 图在上文在下 */
    .news-card {
        flex-direction: column;
    }
    .news-card .news-image {
        width: 100%;
        height: 160px;
    }
    .news-card .news-info {
        padding: 15px;
    }
}

/* ===== 公司简介样式 - 与后台编辑器一致 ===== */
.company-desc {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.company-desc p {
    margin-bottom: 10px;
    text-indent: 2em;
}