/* ===========================
   全局重置 & 基础样式
   =========================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 浅色主题（2026-11-10 由深蓝科技风切回；深色版备份在 _backup_dark/） */
    --primary: #1a5cae;
    --primary-dark: #0a2e6d;
    --primary-light: #2d8fd6;
    --accent: #00b4d8;
    --text-dark: #1a2332;
    --text-body: #555;
    --text-light: #888;
    --bg-white: #ffffff;
    --bg-light: #f5f8fc;
    --bg-gray: #eef2f7;
    --border: #e0e6ed;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-body);
    line-height: 1.6;
    background: var(--bg-white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

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

/* ===========================
   头部导航
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-top {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    font-size: 13px;
    padding: 6px 0;
}

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

.header-contact .contact-item {
    margin-right: 24px;
}

.header-contact a.contact-item {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.header-contact a.contact-item:hover {
    color: #fff;
    text-decoration: underline;
}

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

.header-social a {
    color: rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
}

.header-social a:hover {
    color: #fff;
}

.navbar {
    height: 70px;
    display: flex;
    align-items: center;
}

.nav-inner {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 64px;
    width: 100%;
}

/* 品牌标识 - 去除LOGO，使用纯文字+几何标记 */
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-mark {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 8px;
    position: relative;
    flex-shrink: 0;
}

.brand-mark::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 2px solid #fff;
    border-radius: 4px;
    opacity: 0.9;
}

.brand-mark::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
}

.brand-mark-light {
    background: linear-gradient(135deg, var(--accent) 0%, #fff 100%);
}

.brand-mark-light::before {
    border-color: var(--primary-dark);
}

.brand-mark-light::after {
    background: var(--primary-dark);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-zh {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    letter-spacing: 1px;
}

.brand-en {
    font-size: 10px;
    color: var(--text-light);
    letter-spacing: 1.5px;
}

.nav-menu {
    display: flex;
    gap: 28px;
}

.nav-menu a {
    display: block;
    padding: 10px 14px;
    font-size: 17px;
    color: var(--text-dark);
    font-weight: 500;
    border-radius: 6px;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 2px;
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 24px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===========================
   Banner 轮播
   =========================== */
.banner {
    position: relative;
    height: 600px;
    margin-top: 108px;
    overflow: hidden;
}

.banner-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    overflow: hidden;
}

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

.banner-content {
    position: relative;
    z-index: 2;
    color: #fff;
    max-width: 1200px;
    padding: 0 40px;
}

.banner-title {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.2s;
}

.banner-desc {
    font-size: 22px;
    margin-bottom: 36px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.4s;
    text-shadow: 0 1px 6px rgba(0,0,0,0.2);
}

.banner-btn {
    display: inline-block;
    padding: 14px 40px;
    background: rgba(255,255,255,0.15);
    border: 2px solid #fff;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.6s;
}

.banner-btn:hover {
    background: var(--bg-white);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.banner-slide.active .banner-title,
.banner-slide.active .banner-desc,
.banner-slide.active .banner-btn {
    opacity: 1;
    transform: translateY(0);
}

/* 装饰元素 */
.banner-decor {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    background: var(--bg-white);
}

.banner-decor-1 {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -100px;
}

.banner-decor-2 {
    width: 200px;
    height: 200px;
    bottom: 10%;
    right: 15%;
    opacity: 0.08;
}

/* 轮播控制 */
.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.banner-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.banner-dots .dot.active {
    background: var(--bg-white);
    width: 36px;
    border-radius: 6px;
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.4);
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    line-height: 1;
}

.banner-arrow:hover {
    background: var(--bg-white);
    color: var(--primary-dark);
}

.banner-prev {
    left: 30px;
}

.banner-next {
    right: 30px;
}

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

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

.section-title {
    font-size: 34px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 14px;
    color: var(--text-light);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--primary);
    margin: 20px auto 0;
    border-radius: 2px;
}

.section-desc {
    text-align: center;
    font-size: 16px;
    color: var(--text-body);
    margin-bottom: 40px;
}

/* ===========================
   产品中心
   =========================== */
.products-section {
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

/* 首页产品系列入口卡片（固定3列） */
.products-grid.has-series {
    grid-template-columns: repeat(3, 1fr);
}

.series-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-decoration: none;
    border: 1px solid var(--border);
}

.series-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.series-img {
    height: 200px;
    background: linear-gradient(135deg, var(--bg-light), #fff);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.series-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.series-card:hover .series-img img {
    transform: scale(1.06);
}

.series-icon {
    color: var(--primary);
    opacity: 0.85;
    transition: transform 0.4s ease;
}

.series-icon svg {
    width: 72px;
    height: 72px;
}

.series-card:hover .series-icon {
    transform: scale(1.1);
}

.series-info {
    padding: 22px 24px 24px;
}

.series-name {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.series-en {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.series-desc {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.series-link {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}

.series-card:hover .series-link {
    transform: translateX(4px);
}

.product-card {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.product-img {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #e8f0fb 0%, #d4e4f7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-img .product-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: var(--transition);
}

.product-card:hover .product-icon {
    transform: scale(1.1) rotate(5deg);
}

.product-img .product-icon svg {
    width: 44px;
    height: 44px;
}

/* 产品真实照片 */
.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: var(--bg-white);
    transition: transform 0.4s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.06);
}

/* 产品系列标签 */
.product-img {
    position: relative;
}

.product-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 2;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

/* 无图产品卡片：角标改为文字区顶部的行内徽章（图片区整体不渲染） */
.product-badge-inline {
    position: static;
    display: inline-block;
    margin-bottom: 8px;
}

/* 规格书下载链接 */
.product-pdf {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.product-pdf:hover {
    color: var(--accent);
    text-decoration: underline;
}

.product-card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
}

.product-card-actions .product-link {
    margin-left: auto;
}

.product-info {
    padding: 24px;
}

.product-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    transition: var(--transition);
}

.product-card:hover .product-name {
    color: var(--primary);
}

.product-desc {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.products-more {
    text-align: center;
}

.btn-more {
    display: inline-block;
    padding: 12px 36px;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
}

.btn-more:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,92,174,0.3);
}

/* ===========================
   关于我们 / 数据统计
   =========================== */
.about-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.about-section::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 500px;
    height: 500px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.about-section::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

.section-header-light .section-title {
    color: #fff;
}

.section-header-light .section-line {
    background: var(--bg-white);
}

.about-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 50px;
    position: relative;
    z-index: 2;
}

.about-intro p {
    font-size: 17px;
    line-height: 2;
    color: rgba(255,255,255,0.9);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 60px;
    position: relative;
    z-index: 2;
}

.stat-item {
    text-align: center;
    padding: 30px 15px;
    background: rgba(255,255,255,0.08);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.12);
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
    font-family: "Arial", sans-serif;
}

.stat-number .suffix {
    font-size: 28px;
    margin-left: 2px;
}

.stat-label {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    position: relative;
    z-index: 2;
}

.feature-card {
    background: rgba(255,255,255,0.05);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.2);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.8;
}

/* ===========================
   应用领域
   =========================== */
.application-section {
    background: var(--bg-white);
}

.application-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.app-card {
    position: relative;
    height: 200px;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transition: var(--transition);
}

.app-card:nth-child(2) {
    background: linear-gradient(135deg, #1a6d4e, #2aaf7e);
}

.app-card:nth-child(3) {
    background: linear-gradient(135deg, #6d4e1a, #c79a3e);
}

.app-card:nth-child(4) {
    background: linear-gradient(135deg, #6d1a4e, #c73e7e);
}

.app-card:nth-child(5) {
    background: linear-gradient(135deg, #1a3a6d, #3e7ac7);
}

.app-card:nth-child(6) {
    background: linear-gradient(135deg, #4e1a6d, #7e3ec7);
}

.app-card:nth-child(7) {
    background: linear-gradient(135deg, #1a6d6d, #3ec7c7);
}

.app-card:nth-child(8) {
    background: linear-gradient(135deg, #2a2a3e, #4e4e6d);
}

.app-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.app-card-content {
    position: absolute;
    inset: 0;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    z-index: 2;
}

.app-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.1);
    transition: var(--transition);
}

.app-card:hover::before {
    background: rgba(0,0,0,0.2);
}

.app-card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
    opacity: 0.9;
}

.app-card-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.app-card-en {
    font-size: 12px;
    opacity: 0.8;
    letter-spacing: 1px;
}

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

.news-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.news-tab {
    padding: 10px 32px;
    border: 2px solid var(--border);
    background: var(--bg-white);
    color: var(--text-body);
    font-size: 15px;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.news-tab:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.news-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    display: block;
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border);
    color: inherit;
    text-decoration: none;
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.news-img {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #e8f0fb, #d4e4f7);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.news-img .news-date {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--primary);
    color: #fff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
}

.news-img .news-icon {
    width: 60px;
    height: 60px;
    color: var(--primary-light);
    opacity: 0.4;
}

.news-info {
    padding: 24px;
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

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

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-light);
}

.news-read {
    color: var(--primary);
    font-weight: 500;
}

/* ===========================
   联系我们横幅
   =========================== */
.contact-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.contact-banner::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 400px;
    height: 100%;
    background: rgba(255,255,255,0.05);
    transform: skewX(-15deg);
}

.contact-banner .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 2;
}

.contact-content {
    color: #fff;
}

.contact-title {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-desc {
    font-size: 16px;
    opacity: 0.9;
}

.contact-btn {
    padding: 16px 44px;
    background: var(--bg-white);
    color: var(--primary-dark);
    font-size: 17px;
    font-weight: 700;
    border-radius: 50px;
    white-space: nowrap;
    transition: var(--transition);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

/* ===========================
   页脚
   =========================== */
.footer {
    background: #0f1a2e;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-brand .brand-zh {
    color: #fff;
}

.footer-brand .brand-en {
    color: rgba(255,255,255,0.5);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    max-width: 350px;
}

.footer-title {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

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

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

.footer-links a:hover {
    color: #fff;
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.footer-contact svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--accent);
}

.footer-contact a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
    word-break: break-all;
}

.footer-contact a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* ===========================
   返回顶部
   =========================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

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

    .products-grid.has-series {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-features {
        grid-template-columns: 1fr;
    }

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

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

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

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

    .banner {
        margin-top: 70px;
        height: 400px;
    }

    .banner-title {
        font-size: 32px;
    }

    .banner-desc {
        font-size: 16px;
    }

    .banner-arrow {
        display: none;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        gap: 0;
        padding: 10px 0;
        box-shadow: var(--shadow-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.show {
        max-height: 400px;
    }

    .nav-menu a {
        padding: 14px 30px;
        border-radius: 0;
    }

    .nav-toggle {
        display: flex;
    }

    /* 移动端恢复两端布局：品牌居左，汉堡按钮居右 */
    .nav-inner {
        justify-content: space-between;
        gap: 0;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .products-grid,
    .products-grid.has-series {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

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

    .footer-top {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .contact-banner .container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .contact-title {
        font-size: 24px;
    }
}

/* ===========================
   内页 - 页面顶部Banner
   =========================== */
.page-banner {
    margin-top: 108px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.page-banner::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

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

.page-banner-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.page-banner-subtitle {
    font-size: 16px;
    opacity: 0.8;
    letter-spacing: 2px;
}

/* 面包屑导航 */
.breadcrumb {
    background: var(--bg-light);
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

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

.breadcrumb-inner a:hover {
    color: var(--primary);
}

.breadcrumb-sep {
    color: var(--border);
}

.breadcrumb-current {
    color: var(--primary);
    font-weight: 500;
}

/* ===========================
   内页 - 两栏布局
   =========================== */
.inner-page {
    padding: 60px 0;
    min-height: 500px;
}

.inner-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
}

/* 侧边栏 */
.sidebar {
    position: sticky;
    top: 130px;
    align-self: start;
}

.sidebar-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    padding-bottom: 16px;
    border-bottom: 2px solid var(--primary);
    margin-bottom: 8px;
}

.sidebar-menu li {
    border-bottom: 1px solid var(--border);
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    font-size: 15px;
    color: var(--text-body);
    transition: var(--transition);
}

.sidebar-menu a::after {
    content: '›';
    font-size: 18px;
    color: var(--border);
    transition: var(--transition);
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: var(--bg-light);
    color: var(--primary);
    padding-left: 22px;
}

.sidebar-menu a:hover::after,
.sidebar-menu a.active::after {
    color: var(--primary);
}

/* 侧边栏系列分组标题 */
.sidebar-group {
    padding: 14px 16px 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.5px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
}

.sidebar-group + li a,
.sidebar-group ~ li a {
    font-size: 14px;
    padding-left: 26px;
}

.sidebar-group + li a:hover,
.sidebar-group ~ li a:hover {
    padding-left: 32px;
}

/* 一级分类（大按钮式） */
.sidebar-menu li.sidebar-cat {
    border-bottom: none;
    margin-bottom: 6px;
}

.sidebar-cat a {
    padding: 16px 18px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    background: var(--bg-light);
    border-radius: 10px;
    border-left: 4px solid transparent;
}

.sidebar-cat a::after {
    content: none;
}

/* 悬停：浅蓝提示；点击选中（.active）：实心蓝固定 */
.sidebar-cat a:hover {
    background: rgba(26,92,174,0.08);
    color: var(--primary);
    border-left-color: var(--primary);
    padding-left: 18px;
}

.sidebar-cat a.active {
    background: var(--primary);
    color: #fff;
    border-left-color: var(--primary-dark);
    padding-left: 18px;
}

.sidebar-cat a.active .cat-count {
    background: var(--bg-white);
    color: var(--primary);
}

.cat-count {
    min-width: 26px;
    height: 22px;
    padding: 0 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 11px;
}

/* 二级分类（嵌套在一级分类下，默认收起，父级带 .open 时展开） */
.sidebar-sub {
    list-style: none;
    margin: 2px 0 4px;
    padding: 0;
    display: none;
}

.sidebar-cat.open .sidebar-sub {
    display: block;
}

.sidebar-sub li a {
    padding: 11px 16px 11px 36px;
    font-size: 14px;
    font-weight: 500;
    background: transparent;
    border-radius: 8px;
    border-left: 4px solid transparent;
}

.sidebar-sub li a::after {
    content: none;
}

.sidebar-sub li a:hover {
    background: rgba(26,92,174,0.08);
    color: var(--primary);
    border-left-color: var(--primary);
    padding-left: 36px;
}

.sidebar-sub li a.active {
    background: var(--primary);
    color: #fff;
    border-left-color: var(--primary-dark);
    padding-left: 36px;
}

/* 其他磁性元件（次要分组） */
.sidebar-more {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    padding-top: 18px;
}

.sidebar-more-title {
    font-size: 13px;
    font-weight: 600;
    color: #999;
    letter-spacing: 1px;
    margin-bottom: 6px;
    padding-left: 4px;
}

.sidebar-more-list li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--text-body);
    border-radius: 8px;
    transition: var(--transition);
}

.sidebar-more-list li a:hover,
.sidebar-more-list li a.active {
    background: var(--bg-light);
    color: var(--primary);
    padding-left: 16px;
}

.sidebar-contact {
    margin-top: 30px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: 12px;
    padding: 24px;
    color: #fff;
}

.sidebar-contact-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.sidebar-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.6;
    opacity: 0.9;
}

.sidebar-contact-item svg {
    flex-shrink: 0;
    margin-top: 3px;
    opacity: 0.8;
}

.sidebar-contact-item a {
    color: inherit;
    text-decoration: none;
    word-break: break-all;
}

.sidebar-contact-item a:hover {
    text-decoration: underline;
}

.sidebar-mail {
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.2);
}

/* 主内容区 */
.main-content {
    min-width: 0;
}

/* ===========================
   产品列表页
   =========================== */
.product-list-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-list-grid .product-card {
    display: flex;
    flex-direction: column;
}

.product-list-grid .product-card .product-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-list-grid .product-card .product-desc {
    flex: 1;
}

.product-list-grid .product-card .product-link {
    display: inline-block;
    margin-top: 16px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.product-list-grid .product-card:hover .product-link {
    padding-left: 8px;
}

/* ===========================
   产品详情页
   =========================== */
.product-detail-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

/* 无实物图详情页：隐藏图区后信息区拉满单列 */
.product-detail-header.detail-no-img {
    grid-template-columns: 1fr;
}

.product-gallery {
    background: linear-gradient(135deg, #e8f0fb, #d4e4f7);
    border-radius: 16px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-gallery-icon {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.product-gallery-icon svg {
    width: 64px;
    height: 64px;
}

.product-detail-info h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.4;
}

.product-detail-desc {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 24px;
}

.product-specs {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 24px;
}

.product-specs-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.product-specs-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.product-specs-list li {
    font-size: 14px;
    color: var(--text-body);
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.product-specs-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.product-detail-actions {
    display: flex;
    gap: 16px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,92,174,0.3);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    background: transparent;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    border: 2px solid var(--primary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

/* 产品详情Tab */
.detail-tabs {
    margin-top: 40px;
}

.detail-tab-nav {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 30px;
}

.detail-tab-btn {
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-body);
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.detail-tab-btn::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.detail-tab-btn.active::after {
    transform: scaleX(1);
}

.detail-tab-panel {
    display: none;
    animation: fadeInUp 0.4s ease;
}

.detail-tab-panel.active {
    display: block;
}

.detail-content {
    font-size: 15px;
    line-height: 2;
    color: var(--text-body);
}

.detail-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 24px 0 12px;
}

.detail-content p {
    margin-bottom: 16px;
}

.detail-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}

.detail-content li {
    margin-bottom: 8px;
    list-style: disc;
}

/* 规格表格 */
.spec-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 16px;
    margin-bottom: 24px;
}

.spec-table th {
    background: transparent;    /* 详情页参数表与底色融合；大表表头由 #productTableWrap 恢复浅蓝横条 */
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    border: none;
    line-height: 1.8;
}

.spec-table td {
    padding: 18px 16px;
    border: none;
    color: var(--text-body);                /* 正文加深，提升与浅底的对比度 */
    line-height: 1.8;
}

/* 系列列：辅助信息但仍保持可读的深灰 */
.spec-table td.spec-series {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-light);
    white-space: nowrap;
}

/* 隔行底色取消：产品详情页参数表与页面底色融为一体
   （全部产品大表由 #productTableWrap 单独恢复浅微隔行） */
.spec-table tr:nth-child(even) td {
    background: transparent;
}

/* ===========================
   关于我们页
   =========================== */
.about-page-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 60px;
}

.about-page-text h2 {
    font-size: 30px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-page-text p {
    font-size: 15px;
    line-height: 2;
    color: var(--text-body);
    margin-bottom: 16px;
}

.about-page-img {
    height: 350px;
    background: linear-gradient(135deg, #e8f0fb, #d4e4f7);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.about-page-img-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.about-page-img::before {
    content: '';
    position: absolute;
    top: 20px;
    right: 20px;
    width: 80px;
    height: 80px;
    border: 3px solid rgba(26,92,174,0.2);
    border-radius: 12px;
}

.about-page-img::after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 60px;
    height: 60px;
    border: 3px solid rgba(0,180,216,0.2);
    border-radius: 50%;
}

/* 荣誉资质 */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.honor-card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.honor-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.honor-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.honor-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.honor-desc {
    font-size: 13px;
    color: var(--text-light);
}

/* ===========================
   应用领域详情页
   =========================== */
.app-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.app-detail-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.app-detail-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.app-detail-header {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    gap: 16px;
}

.app-detail-header svg {
    width: 48px;
    height: 48px;
}

.app-detail-header h3 {
    font-size: 22px;
    font-weight: 700;
}

.app-detail-body {
    padding: 24px;
}

.app-detail-body p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-body);
    margin-bottom: 16px;
}

.app-detail-body .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
    border: 1px solid var(--border);
}

/* ===========================
   新闻列表页
   =========================== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.news-list-item {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 24px;
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.news-list-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-list-img {
    width: 240px;
    height: 170px;
    background: linear-gradient(135deg, #e8f0fb, #d4e4f7);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.news-list-img svg {
    width: 40px;
    height: 40px;
    color: var(--primary-light);
    opacity: 0.4;
}

.news-list-content {
    padding: 24px 24px 24px 0;
    display: flex;
    flex-direction: column;
}

.news-list-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.5;
    transition: var(--transition);
}

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

.news-list-excerpt {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-list-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-light);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 50px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-white);
    color: var(--text-body);
}

.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination .active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.pagination .disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* ===========================
   新闻详情页
   =========================== */
.article-header {
    margin-bottom: 30px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.article-header h1 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.5;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    gap: 24px;
    font-size: 14px;
    color: var(--text-light);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-body {
    font-size: 15px;
    line-height: 2;
    color: var(--text-body);
}

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

.article-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 30px 0 16px;
}

.article-body img {
    max-width: 100%;
    border-radius: 12px;
    margin: 20px 0;
}

.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.article-nav-item {
    padding: 16px 20px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: var(--transition);
}

.article-nav-item:hover {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
}

.article-nav-label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 6px;
}

.article-nav-title {
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 500;
}

/* ===========================
   联系我们页
   =========================== */
.contact-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-form-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.contact-form-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.contact-form-subtitle {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 30px;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-label .required {
    color: #e74c3c;
    margin-left: 2px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-dark);
    background: var(--bg-light);
    transition: var(--transition);
    outline: none;
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--primary);
    background: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(26,92,174,0.1);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-info-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    display: flex;
    gap: 20px;
    transition: var(--transition);
}

.contact-info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-info-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}

.contact-info-label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-info-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.contact-info-mail {
    display: block;
    margin-top: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    word-break: break-all;
}

.contact-info-mail:hover {
    text-decoration: underline;
}

.form-mail-tip {
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-body);
    text-align: center;
}

.form-mail-tip a {
    color: var(--primary);
    text-decoration: none;
}

.form-mail-tip a:hover {
    text-decoration: underline;
}

.contact-map {
    height: 280px;
    background: linear-gradient(135deg, #e8f0fb, #d4e4f7);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    font-size: 16px;
    position: relative;
}

.contact-map::before {
    content: '';
    position: absolute;
    inset: 20px;
    border: 2px dashed rgba(26,92,174,0.15);
    border-radius: 12px;
}

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

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

    .about-page-intro {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 768px) {
    .page-banner {
        margin-top: 70px;
        height: 220px;
    }

    .page-banner-title {
        font-size: 30px;
    }

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

    .sidebar {
        position: static;
    }

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

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

    .product-gallery {
        height: 280px;
    }

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

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

    .news-list-img {
        width: 100%;
        height: 180px;
    }

    .news-list-content {
        padding: 20px;
    }

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

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

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

/* ===========================
   新闻详情页
   =========================== */
.news-main {
    min-width: 0;
}

.news-article {
    background: var(--bg-white);
    padding: 40px 44px;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.news-article-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 16px;
}

.news-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    font-size: 14px;
    color: #8a94a6;
    padding-bottom: 18px;
    margin-bottom: 28px;
    border-bottom: 1px solid var(--border);
}

.news-body p {
    font-size: 15px;
    line-height: 2;
    color: var(--text-body);
    margin-bottom: 18px;
}

.news-body .news-lead {
    font-weight: 600;
    color: var(--text-dark);
    background: var(--bg-light);
    border-left: 3px solid var(--primary);
    padding: 16px 20px;
    border-radius: 0 4px 4px 0;
    margin-bottom: 26px;
}

.news-nav {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-top: 34px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 14px;
}

.news-nav a {
    color: var(--text-body);
    transition: color 0.25s ease;
}

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

.news-nav-disabled {
    color: #bcc4d0;
}

.news-nav-next {
    text-align: right;
    margin-left: auto;
}

.news-back {
    margin-top: 30px;
}

#newsRelated li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
}

#newsRelated li:last-child {
    border-bottom: none;
}

#newsRelated a {
    display: block;
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.6;
    transition: color 0.25s ease;
}

#newsRelated a:hover {
    color: var(--primary);
}

#newsRelated span {
    display: block;
    font-size: 12px;
    color: #a7b0be;
    margin-top: 4px;
}

@media (max-width: 768px) {
    .news-article {
        padding: 24px 20px;
    }

    .news-article-title {
        font-size: 22px;
    }

    .news-nav {
        flex-direction: column;
        gap: 12px;
    }

    .news-nav-next {
        text-align: left;
        margin-left: 0;
    }
}

/* ===========================
   替代型号查询（Cross Reference）
   =========================== */
.cross-intro {
    text-align: center;
    margin-bottom: 34px;
}

.cross-intro-text {
    max-width: 760px;
    margin: 14px auto 0;
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-body);
}

.cross-search-box {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 26px 28px;
    margin-bottom: 24px;
}

.cross-search-row {
    display: flex;
    gap: 16px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.cross-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cross-field-main {
    flex: 1 1 320px;
    min-width: 240px;
}

.cross-field-btn {
    flex: 0 0 auto;
}

.cross-label {
    font-size: 13px;
    color: #7a8496;
}

.cross-input,
.cross-select {
    height: 44px;
    padding: 0 14px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-dark);
    background: var(--bg-white);
    outline: none;
    transition: border-color 0.25s ease;
}

.cross-input:focus,
.cross-select:focus {
    border-color: var(--primary);
}

.cross-select {
    min-width: 150px;
}

.cross-search-btn {
    height: 44px;
    padding: 0 34px;
    border: none;
    cursor: pointer;
    font-size: 15px;
}

.cross-hot {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px dashed var(--border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.cross-hot-label {
    font-size: 13px;
    color: #7a8496;
}

.cross-hot-item {
    padding: 5px 14px;
    font-size: 13px;
    color: var(--text-body);
    background: var(--bg-light);
    border: 1px solid transparent;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.cross-hot-item:hover {
    color: var(--primary);
    background: rgba(26,92,174,0.08);
    border-color: var(--primary);
}

.cross-status {
    font-size: 14px;
    color: var(--text-body);
    margin-bottom: 16px;
}

.cross-status b {
    color: var(--primary);
}

.cross-tip {
    color: #8a94a6;
}

.cross-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}

.cross-table th {
    background: var(--bg-light);
    padding: 14px 16px;
    text-align: left;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
}

.cross-table td {
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-body);
    border-bottom: 1px solid var(--border);
}

.cross-table tbody tr:hover {
    background: var(--bg-light);
}

.cross-table .cross-part {
    font-weight: 600;
    color: var(--text-dark);
}

.cross-table .cross-our {
    font-weight: 600;
    color: var(--primary);
}

.cross-link {
    color: var(--primary);
    font-weight: 600;
}

.cross-link:hover {
    text-decoration: underline;
}

.cross-na {
    color: #bcc4d0;
}

.cross-fallback {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 34px 36px;
    text-align: center;
}

.cross-fallback-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.cross-fallback-text {
    font-size: 14px;
    line-height: 1.9;
    color: var(--text-body);
    max-width: 620px;
    margin: 0 auto 22px;
}

.cross-own {
    margin-top: 38px;
    padding-top: 26px;
    border-top: 1px dashed var(--border);
    text-align: left;
}

.cross-own-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 14px;
}

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

.cross-own-item {
    padding: 6px 14px;
    font-size: 13px;
    color: var(--text-body);
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 4px;
    transition: all 0.25s ease;
}

.cross-own-item:hover {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}

@media (max-width: 768px) {
    .cross-search-box {
        padding: 20px 18px;
    }

    .cross-search-row {
        flex-direction: column;
        align-items: stretch;
    }

    .cross-search-btn {
        width: 100%;
    }

    .cross-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .cross-fallback {
        padding: 24px 20px;
    }
}


/* ===========================
   SEO 增强模块（参数表 / FAQ / 系列聚合页说明）
   =========================== */
.detail-block {
    margin: 28px 0;
}

/* 详情页双列：电气参数（左） + 设计优势（右） */
.detail-two-col {
    display: flex;
    align-items: flex-start;
    gap: 36px;
    margin: 24px 0 8px;
}

.detail-col-spec {
    flex: 1 1 58%;
    min-width: 0;
}

.detail-col-adv {
    flex: 1 1 42%;
    min-width: 0;
}

.detail-col-adv ul {
    margin: 0;
}

@media (max-width: 860px) {
    .detail-two-col {
        flex-direction: column;
        gap: 20px;
    }
}

/* 图纸尺寸（规格书 Dimensions 区自动裁剪图，浅色主题直接展示原图） */
.dim-figure {
    margin: 0 auto;
    max-width: 980px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    box-shadow: var(--shadow-sm);
}

.dim-drawing {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    margin: 0;
    border-radius: 6px;
}

.detail-block-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 14px;
    padding-left: 10px;
    border-left: 3px solid var(--primary);
}

.faq-item {
    margin-bottom: 18px;
    padding-bottom: 16px;
    border-bottom: 1px dashed var(--border);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.faq-item p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.8;
}

.series-intro {
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 22px 24px;
    margin-bottom: 24px;
}

.series-intro h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.series-intro p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.9;
}

.series-intro-count {
    color: var(--primary);
    font-weight: 600;
    margin-top: 8px;
}


/* ===========================
   全部产品 规格表视图（表头内嵌筛选 / 链接 / 响应式）
   =========================== */
#productTableWrap { margin-bottom: 32px; }

/* 表头内嵌筛选下拉（替代独立筛选栏，Excel 式列筛选） */
.spec-table thead .th-label { display: block; }

.spec-table thead select {
    display: block;
    margin: 7px auto 0;
    padding: 5px 24px 5px 9px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-white);
    font-size: 13px;
    color: var(--text-dark);
    cursor: pointer;
    max-width: 132px;
    font-weight: 400;
}

.spec-table thead select:focus {
    outline: none;
    border-color: var(--primary);
}

/* 品类名称较长，单独放宽 */
#specCatFilter { max-width: 160px; }

.spec-filter-count {
    display: block;
    margin-top: 7px;
    font-size: 12px;
    font-weight: 400;
    color: var(--text-light);
    white-space: nowrap;
}

.spec-filter-count b { color: var(--primary); }

.spec-table-scroll { overflow-x: auto; }

.spec-table-scroll .spec-table { min-width: 760px; margin-bottom: 0; }

/* 料号：纯文字、深色常规（不再是链接，进入详情走末列） */
.spec-table td.spec-part {
    font-weight: 400;
    color: var(--text-dark);
}

/* 全部产品规格表：所有文字居中 */
.spec-table--center th,
.spec-table--center td {
    text-align: center;
    vertical-align: middle;
}

.spec-td-actions { white-space: nowrap; text-align: center; }

.spec-pdf {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
    margin-right: 12px;
    color: var(--primary);
    text-decoration: none;
}

.spec-pdf-icon { display: block; }

.spec-pdf:hover { opacity: .72; }

.spec-pdf-none { color: var(--border); margin-right: 12px; font-size: 13px; }

.spec-detail {
    color: var(--primary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
}

.spec-detail:hover { color: var(--primary); }
/* 点击过的「详情」固定为主题蓝 */
.spec-detail:visited { color: var(--primary); }

/* 规格表整行悬停变色；点过的行固定颜色（浅色主题：淡蓝高亮） */
.spec-table tbody tr { transition: background-color .15s ease; }
.spec-table tbody tr:hover { background: rgba(26,92,174,0.10); }
.spec-table tbody tr.spec-row-visited { background: rgba(26,92,174,0.07); }
.spec-table tbody tr.spec-row-visited:hover { background: rgba(26,92,174,0.07); }

/* ===========================
   规格表 · 浅色卡片风
   仅作用于 products.html 的 #productTableWrap 区块
   =========================== */
#productTableWrap {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 18px 8px;
    box-shadow: var(--shadow-sm);
}

/* 表头内嵌下拉：白底 + 主题蓝描边 */
#productTableWrap .spec-table thead select {
    background: #fff;
    color: var(--text-dark);
    border-color: #cfd8e3;
}
#productTableWrap .spec-table thead select:focus { border-color: var(--primary); }
#productTableWrap .spec-filter-count { color: var(--text-light); }
#productTableWrap .spec-filter-count b { color: var(--primary); }

/* 表头：浅蓝底横条 + 深色文字 */
#productTableWrap .spec-table th {
    background: var(--bg-light);
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
}

/* 表体：深灰文字，隔行浅微底色 */
#productTableWrap .spec-table td { color: var(--text-body); }
#productTableWrap .spec-table td.spec-part { color: var(--text-dark); }
#productTableWrap .spec-table td.spec-series { color: var(--text-light); }
#productTableWrap .spec-table tr:nth-child(even) td { background: rgba(26, 92, 174, .04); }

/* 行悬停 / 已点击：淡蓝高亮（作用到 td，避免隔行底色盖住） */
/* 行悬停：比已点击更深一档；已点击颜色不变 */
#productTableWrap .spec-table tbody tr[data-name] { cursor: pointer; } /* 整行可点，直接进产品详情 */
#productTableWrap .spec-table tbody tr:hover td { background: rgba(26, 92, 174, .10); }
#productTableWrap .spec-table tbody tr.spec-row-visited td { background: rgba(26, 92, 174, .07); }
#productTableWrap .spec-table tbody tr.spec-row-visited:hover td { background: rgba(26, 92, 174, .07); }

/* 「产品信息」链接：主题蓝 */
#productTableWrap .spec-detail { color: var(--primary); }
#productTableWrap .spec-detail:hover { color: var(--primary-dark); }
#productTableWrap .spec-detail:visited { color: var(--primary); }

/* 行悬停缩略图：浮动层挂在 body 上（fixed 定位），仅悬停有图的产品时弹出 */
.spec-thumb-float {
    position: fixed;
    z-index: 9999;
    display: none;
    padding: 8px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    pointer-events: none;   /* 不挡行悬停/点击 */
}
.spec-thumb-float img {
    display: block;
    width: 188px;
    height: auto;
    border-radius: 6px;
    background: #fff;       /* 产品图为白底拍摄，保持白底框 */
}

@media (max-width: 768px) {
    .spec-table thead select,
    #specCatFilter { max-width: none; width: 100%; box-sizing: border-box; }
}

/* ===== 同系列参数对比表（2026-11-12 收录优化，产品页差异化内容） ===== */
.peer-note {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-body);
    margin-bottom: 14px;
}

.peer-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.peer-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    min-width: 560px;
}

.peer-table thead th {
    background: var(--bg-light);
    color: var(--text-dark);
    font-weight: 600;
    text-align: left;
    padding: 11px 14px;
    white-space: nowrap;
    border-bottom: 1px solid var(--border);
}

.peer-table tbody td {
    padding: 10px 14px;
    color: var(--text-body);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.peer-table tbody tr:last-child td { border-bottom: none; }
.peer-table tbody tr:hover td { background: var(--bg-light); }

.peer-table tbody tr.peer-me td {
    background: rgba(26, 92, 174, .06);
    color: var(--text-dark);
}

.peer-table a { color: var(--primary); text-decoration: none; }
.peer-table a:hover { text-decoration: underline; }

/* ===== 替代查询页：按参数找替代 + 静态内容区块（2026-11-13） ===== */
.cross-param-box {
    margin-top: 40px;
    padding: 26px 26px 30px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.cross-param-box .section-title { margin-bottom: 10px; }

.param-ok,
.param-low {
    display: inline-block;
    font-size: 12px;
    line-height: 1;
    padding: 3px 8px;
    border-radius: 999px;
    margin-left: 4px;
    vertical-align: middle;
}

.param-ok {
    color: #1a7a3c;
    background: rgba(26, 122, 60, .12);
}

.param-low {
    color: #a05a12;
    background: rgba(160, 90, 18, .12);
}

.cross-guide { margin-top: 44px; }

.cross-guide .section-title { margin-bottom: 14px; }

.cross-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.cross-step {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 20px;
}

.cross-step-no {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary);
    margin-bottom: 8px;
}

.cross-step h3 {
    font-size: 17px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.cross-step p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-body);
}

.cross-series-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.cross-series-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    text-decoration: none;
    transition: border-color .2s, box-shadow .2s;
}

.cross-series-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 14px rgba(26, 92, 174, .10);
}

.cross-series-item b {
    font-size: 16px;
    color: var(--text-dark);
}

.cross-series-item span {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-body);
}

.cross-guide .faq-item { background: var(--bg-white); }

@media (max-width: 768px) {
    .cross-steps,
    .cross-series-list { grid-template-columns: 1fr; }
}

/* ===== 替代落地页 / cross 页竞品型号链接（2026-11-13） ===== */
.replace-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.replace-chip {
    display: inline-block;
    font-size: 14px;
    line-height: 1;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-body);
    text-decoration: none;
    background: var(--bg-light);
    transition: border-color .2s, color .2s;
}

.replace-chip:hover {
    border-color: var(--primary);
    color: var(--primary);
}