/* ==================== 基础重置与变量 ==================== */
:root {
    --primary: #0066cc;
    --primary-dark: #004d99;
    --primary-light: #1a8cff;
    --secondary: #00a8e8;
    --accent: #ff6b35;
    --dark: #0a1628;
    --dark-blue: #05132a;
    --text: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --white: #ffffff;
    --gray: #f5f7fa;
    --gray-dark: #e8ecf1;
    --border: #e0e0e0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --container-width: 1440px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
    background: var(--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: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

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

.btn-sm {
    padding: 8px 20px;
    font-size: 13px;
}

/* ==================== 区块标题 ==================== */
.section-header {
    text-align: left;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.section-header .section-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

.section-header .section-line {
    width: 50px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

/* 标题+选项卡的flex布局（公司实力、新闻动态） */
.section-header-flex {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.section-header-left {
    flex-shrink: 0;
}

.section-header-tabs {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.section-header-tabs .btn-outline {
    padding: 10px 24px;
    border-radius: 4px;
    font-size: 14px;
}

.section-header.light h2,
.section-header.light .section-subtitle {
    color: var(--white);
}

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

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 120px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
}

.logo-text h1 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.logo-text span {
    font-size: 11px;
    color: var(--primary);
    letter-spacing: 1px;
}

.nav-list {
    display: flex;
    gap: 35px;
}

.nav-list a {
    font-size: 18px;
    font-weight: 500;
    color: var(--text);
    position: relative;
    padding: 5px 0;
}

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

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

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

.header-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    font-size: 30px;
}

.header-phone i {
    font-size: 32px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    color: var(--text);
    cursor: pointer;
}

/* ==================== Banner区域 ==================== */
.banner {
    position: relative;
    min-height: 600px;
	height: 793px;
    display: flex;
    align-items: center;
	background: url("../images/banner.jpg") no-repeat top;
    overflow: hidden;
    margin-top: 120px;
}

.banner-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.tech-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

.tech-grid::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

.banner-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 80px 20px;
}

.banner-text {
    max-width: 650px;
    color: var(--white);
}

.banner-text h2 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 8px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.banner-text h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.banner-text p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 30px;
    line-height: 1.8;
}

.banner-image {
    position: relative;
    width: 387px;
    height: 387px;
}

.pipe-showcase {
    position: relative;
    width: 100%;
    height: 100%;
}

.pipe {
    position: absolute;
    background: linear-gradient(180deg, #2c2c2c 0%, #1a1a1a 50%, #0d0d0d 100%);
    border-radius: 50%;
    box-shadow:
        inset -5px -5px 15px rgba(255,255,255,0.1),
        inset 5px 5px 15px rgba(0,0,0,0.5),
        0 10px 30px rgba(0,0,0,0.3);
}

.pipe::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    height: 70%;
    background: linear-gradient(180deg, #1a1a1a 0%, #0d0d0d 100%);
    border-radius: 50%;
}

.pipe-1 {
    width: 140px;
    height: 140px;
    top: 20px;
    right: 50px;
}

.pipe-2 {
    width: 100px;
    height: 100px;
    top: 80px;
    right: 180px;
}

.pipe-3 {
    width: 80px;
    height: 80px;
    top: 10px;
    right: 10px;
}

.pipe-4 {
    width: 120px;
    height: 120px;
    bottom: 30px;
    right: 100px;
}

.pipe-5 {
    width: 60px;
    height: 60px;
    bottom: 60px;
    right: 30px;
}

/* ==================== 关于我们 ==================== */
.about {
    position: relative;
	min-height: 800px;
    padding: 150px 0;
    background: url("../images/bg_abuot.jpg") no-repeat;
    overflow: hidden;
}

.about-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.stars {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 160px 120px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 230px 80px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 300px 50px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 350px 150px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 450px 90px, rgba(255,255,255,0.2), transparent);
    background-size: 500px 200px;
}

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

.about-body {
    max-width: 900px;
}

.about-text {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 2;
    text-align: left;
}

.about-text p {
    margin-bottom: 20px;
}

.about-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary);
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 30px;
    transition: var(--transition);
}

.about-more:hover {
    color: var(--white);
    gap: 12px;
}

.about-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.about-indicators .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.about-indicators .dot.active {
    background: var(--secondary);
}

/* ==================== 产品分类 ==================== */
.product-category {
    padding: 100px 0 0 0;
    background: var(--white);
}

.category-banners {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.category-banner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 4 / 3;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.category-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 22, 40, 0.18);
    transition: var(--transition);
}

.category-banner:hover::before {
    background: rgba(10, 22, 40, 0.08);
}

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

.category-banner-content h3 {
    color: var(--white);
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
}

.category-banner-btn {
    display: inline-block;
    padding: 8px 26px;
    background: var(--white);
    color: var(--text);
    font-size: 14px;
    border-radius: 3px;
    transition: var(--transition);
}

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

/* ==================== 产品中心 ==================== */
.products {
    padding: 100px 0;
    background: var(--gray);
}

.products-layout {
    display: flex;
    gap: 30px;
}

.products-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--primary);
    border-radius: 8px;
    overflow: hidden;
    height: fit-content;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px;
    background: var(--primary-dark);
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
}

.category-list li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.category-list li:last-child {
    border-bottom: none;
}

.category-list a {
    display: block;
    padding: 15px 20px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    transition: var(--transition);
}

.category-list li.active a,
.category-list a:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    padding-left: 25px;
}

.products-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.products-grid .product-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.products-grid .product-img {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--gray-dark);
}

.products-grid .product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.products-grid .product-card:hover .product-img img {
    transform: scale(1.05);
}

.products-grid .product-card h4 {
    padding: 15px;
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
}

/* ==================== 应用领域 ==================== */
.applications {
    padding: 100px 0 0 0;
    background: var(--white);
}

.applications-wrapper {
    width: 100%;
    padding: 0;
}

.applications-accordion {
    display: flex;
    width: 100%;
    height: 600px;
    gap: 0;
}

.applications-accordion .app-card {
    position: relative;
    flex: 0 0 12%;
    height: 100%;
    cursor: pointer;
    overflow: hidden;
    transition: flex 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border-right: 3px solid var(--white);
}

.applications-accordion .app-card:last-child {
    border-right: none;
}

.applications-accordion .app-card.active {
    flex: 0 0 40%;
}

.app-card .app-img {
    position: relative;
    width: 100%;
    height: 100%;
}

.app-card .app-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-card .app-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    color: var(--white);
    transition: var(--transition);
}

.app-card .app-overlay h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 5px;
    transition: var(--transition);
}

.app-card:not(.active) .app-overlay h3 {
    writing-mode: vertical-lr;
    position: absolute;
    bottom: 50%;
    left: 50%;
    transform: translate(-50%, 50%);
    font-size: 16px;
    letter-spacing: 3px;
}

.app-card:not(.active) .app-overlay p {
    display: none;
}

.app-card .app-overlay p {
    font-size: 13px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.app-card:hover .app-overlay {
    background: linear-gradient(to top, rgba(0,102,204,0.6) 0%, rgba(0,102,204,0.2) 50%, rgba(0,102,204,0.05) 100%);
}

/* ==================== 公司实力 ==================== */
.strength {
    padding: 100px 0;
    background: var(--gray);
}

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

.strength-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.strength-img {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.strength-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.strength-tag {
    padding: 12px 15px;
    font-size: 13px;
    color: var(--text-light);
    text-align: center;
    border-top: 1px solid var(--gray-dark);
}

/* ==================== 新闻动态 ==================== */
.news {
    padding: 100px 0;
    background: var(--white);
}

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

.news-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.news-img {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.news-body {
    padding: 20px;
}

.news-date {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

.news-date i {
    font-size: 14px;
}

.news-body h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-body p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== 底部Footer ==================== */
.footer {
    background: linear-gradient(180deg, #0a1f3d 0%, #05132a 100%);
    color: var(--white);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1.2fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-logo i {
    width: 45px;
    height: 45px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.footer-logo h3 {
    font-size: 16px;
    font-weight: 600;
}

.footer-logo span {
    font-size: 11px;
    opacity: 0.7;
    letter-spacing: 1px;
}

.footer-brand p {
    font-size: 13px;
    line-height: 1.8;
    opacity: 0.7;
}

.footer-contact h4,
.footer-form h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 13px;
    opacity: 0.8;
}

.footer-contact ul li i {
    margin-top: 3px;
    color: var(--secondary);
    width: 16px;
}

.footer-form form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-row {
    display: flex;
    gap: 10px;
}

.footer-form input,
.footer-form textarea {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--white);
    font-size: 13px;
    transition: var(--transition);
}

.footer-form input::placeholder,
.footer-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.footer-form input:focus,
.footer-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.1);
}

.footer-form textarea {
    resize: vertical;
    min-height: 80px;
}

.footer-form .btn {
    align-self: flex-start;
    padding: 10px 30px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 12px;
    opacity: 0.6;
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    :root {
        --container-width: 100%;
    }
    .container {
        padding: 0 20px;
    }

.logo img{
	width: 60%;
}
    .products-layout {
        flex-direction: column;
    }

    .products-sidebar {
        width: 100%;
    }

    .category-list,
    .page-category-list {
        display: flex;
        flex-wrap: wrap;
    }

    .category-list li {
        width: 50%;
        border-bottom: none;
        border-right: 1px solid rgba(255, 255, 255, 0.1);
    }

    .page-category-list li {
        border-bottom: none;
        border-right: 1px solid var(--gray-dark);
    }

    .category-list a,
    .page-category-list li a {
        padding: 12px 20px;
        white-space: nowrap;
    }

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

    /* 手风琴平板适配 */
    .applications-accordion {
        height: 350px;
    }
    .applications-accordion .app-card {
        flex: 0 0 12%;
    }
    .applications-accordion .app-card.active {
        flex: 0 0 40%;
    }

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

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

    .news-list-img {
        width: 200px;
    }

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

    .footer-form {
        grid-column: 1 / -1;
    }

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

    .contact-bottom-section {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 60px;
    }

.logo img{
	width: 60%;
}
    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        transform: translateY(-150%);
        transition: var(--transition);
        z-index: 999;
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
    }

    .nav-list li {
        border-bottom: 1px solid var(--gray-dark);
    }

    .nav-list a {
        display: block;
        padding: 12px 0;
    }

    .header-phone {
        display: none;
    }

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

    .banner {
        min-height: auto;
        margin-top: 60px;
    }

    .category-banners {
        grid-template-columns: 1fr;
    }

    .category-banner {
        aspect-ratio: 4 / 3;
    }

    .category-banner-content h3 {
        font-size: 24px;
    }

    .banner-content {
        flex-direction: column-reverse;
        text-align: center;
        padding: 50px 20px;
    }

    .banner-text h2 {
        font-size: 26px;
    }

    .banner-text h3 {
        font-size: 22px;
    }

    .banner-image {
        width: 280px;
        height: 200px;
        margin-bottom: 30px;
    }

    .pipe-1 { width: 100px; height: 100px; top: 10px; right: 30px; }
    .pipe-2 { width: 70px; height: 70px; top: 50px; right: 120px; }
    .pipe-3 { width: 50px; height: 50px; top: 0; right: 0; }
    .pipe-4 { width: 85px; height: 85px; bottom: 20px; right: 70px; }
    .pipe-5 { width: 45px; height: 45px; bottom: 40px; right: 10px; }

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

    .section-header-flex {
        flex-direction: column;
        align-items: flex-start;
    }

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

    /* 手风琴手机适配 - 改为纵向堆叠 */
    .applications-accordion {
        flex-direction: column;
        height: auto;
        padding: 0 20px;
    }
    .applications-accordion .app-card {
        flex: auto !important;
        height: 220px;
        border-right: none;
        border-bottom: 3px solid var(--white);
    }
    .applications-accordion .app-card:last-child {
        border-bottom: none;
    }
    .app-card:not(.active) .app-overlay h3 {
        writing-mode: horizontal-tb;
        position: absolute;
        bottom: auto;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

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

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

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

    .form-row {
        flex-direction: column;
    }

    /* 二级页面通用响应式 */
    .page-banner {
        height: 200px;
        margin-top: 60px;
    }

    .page-banner-content h2 {
        font-size: 26px;
    }

    .page-content {
        padding: 40px 0 60px;
    }

    .page-about-content h2 {
        font-size: 24px;
    }

    .page-about-content .lead {
        font-size: 15px;
    }

    /* 产品页手机适配 */
    .products-page-layout,
    .news-page-layout {
        flex-direction: column;
    }

    .products-page-sidebar {
        width: 100%;
    }

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

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

    .page-category-list {
        display: block;
    }

    .page-category-list li {
        border-bottom: 1px solid var(--gray-dark);
        border-right: none;
    }

    .page-category-list li:last-child {
        border-bottom: none;
    }

    .page-category-list li a {
        display: block;
        padding: 14px 20px;
        font-size: 14px;
        white-space: normal;
    }

    /* 新闻页手机适配 */
    .news-list-item {
        flex-direction: column;
    }

    .news-list-img {
        width: 100%;
        aspect-ratio: 16/9;
    }

    .news-list-meta {
        flex-wrap: wrap;
        gap: 10px;
    }

    .news-list-more {
        margin-left: 0;
    }

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

    .contact-page-form .form-row {
        flex-direction: column;
    }

    /* 分页手机适配 */
    .pagination {
        gap: 4px;
    }

    .page-btn,
    .page-num {
        min-width: 34px;
        height: 34px;
        padding: 0 10px;
        font-size: 13px;
    }

    .page-total {
        width: 100%;
        text-align: center;
        margin-left: 0;
        margin-top: 8px;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

.logo img{
	width: 60%;
}
    .applications-accordion .app-card {
        height: 180px;
    }

    .section-header-tabs {
        flex-wrap: wrap;
    }

    .section-header-tabs .btn-outline {
        padding: 8px 16px;
        font-size: 12px;
    }

    .page-banner {
        height: 160px;
    }

    .page-banner-content h2 {
        font-size: 22px;
    }

    .products-page-grid,
    .applications-page-grid {
        grid-template-columns: 1fr;
    }

    .page-category-list li a {
        padding: 12px 16px;
        font-size: 13px;
    }
}

/* ==================== 二级页面通用样式 ==================== */

/* 页面Banner */
.page-banner {
    position: relative;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 70px;
    overflow: hidden;
}

.page-banner-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0d47a1 0%, #1565c0 50%, #42a5f5 100%);
    background-size: cover;
    background-position: center;
}

.bg1 {
    background-image: url("../images/about.jpg");
}
.bg2 {
    background-image: url("../images/prod.jpg");
}
.bg3 {
    background-image: url("../images/case.jpg");
}
.bg4 {
    background-image: url("../images/new.jpg");
}
.bg5 {
    background-image: url("../images/lianxi.jpg");
}

.page-banner-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
}

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

.page-banner-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.page-banner-content p {
    font-size: 14px;
    opacity: 0.8;
    letter-spacing: 4px;
}

/* 面包屑导航 */
.breadcrumb {
    background: var(--gray);
    border-bottom: 1px solid var(--gray-dark);
}

.breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 0;
    font-size: 13px;
}

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

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

.breadcrumb-inner .separator {
    color: var(--text-muted);
}

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

/* 内页内容区 */
.page-content {
    padding: 60px 0 80px;
}

.page-about-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 15px;
}

.page-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 15px;
	text-align: center;
}

.page-section-line {
    width: 50px;
    height: 3px;
    background: var(--primary);
    margin-bottom: 35px;
    border-radius: 2px;
}

.page-line {
    width: 100%;
    height: 1px;
    background: var(--gray-dark);
    margin-top: 15px;
    margin-bottom: 35px;
    border-radius: 2px;
}

.page-about-content p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 2;
    margin-bottom: 20px;
}

.page-about-content .lead {
    font-size: 17px;
    color: var(--text);
    font-weight: 500;
    line-height: 2;
}

/* ==================== 产品中心二级页面 ==================== */
.products-page-layout {
    display: flex;
    gap: 30px;
}

/* 左侧分类侧边栏 */
.products-page-sidebar {
    width: 240px;
    flex-shrink: 0;
    border: 1px solid var(--gray-dark);
    border-radius: 4px;
    overflow: hidden;
    align-self: flex-start;
}

.page-sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px;
    background: var(--primary-dark);
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
}

.page-sidebar-header i {
    font-size: 16px;
}

.page-category-list li {
    border-bottom: 1px solid var(--gray-dark);
}

.page-category-list li:last-child {
    border-bottom: none;
}

.page-category-list li a {
    display: block;
    padding: 14px 20px;
    color: var(--text);
    font-size: 14px;
    transition: var(--transition);
    cursor: pointer;
}

.page-category-list li a:hover {
    color: var(--primary);
    background: #e8f4fd;
}

.page-category-list li.active a,
.page-category-list li.active a:hover {
    background: var(--primary);
    color: var(--white);
    font-weight: 500;
}

/* 右侧产品列表 */
.products-page-main {
    flex: 1;
    min-width: 0;
}

.products-page-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.products-page-grid .product-card {
    border: 1px solid var(--gray-dark);
    border-radius: 6px;
    overflow: hidden;
    transition: var(--transition);
}

.products-page-grid .product-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: var(--primary);
}

.products-page-grid .product-img {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--gray);
}

.products-page-grid .product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.products-page-grid .product-card:hover .product-img img {
    transform: scale(1.08);
}

.products-page-grid .product-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    padding: 15px 15px 5px;
}

.products-page-grid .product-desc {
    font-size: 13px;
    color: var(--text-light);
    padding: 0 15px 15px;
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
    padding-top: 20px;
    border-top: 1px solid var(--gray-dark);
}

.page-btn,
.page-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 14px;
    border: 1px solid var(--gray-dark);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text);
    background: var(--white);
    transition: var(--transition);
    white-space: nowrap;
}

.page-btn:hover,
.page-num:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.page-num.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    font-weight: 600;
}

.page-btn.disabled {
    color: var(--text-muted);
    cursor: not-allowed;
    pointer-events: none;
    opacity: 0.5;
}

.page-dots {
    padding: 0 4px;
    color: var(--text-muted);
    font-size: 14px;
}

.page-total {
    font-size: 13px;
    color: var(--text-light);
    margin-left: 16px;
}

/* ==================== 应用领域二级页面 ==================== */
.applications-page-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.app-area-card {
    border: 1px solid var(--gray-dark);
    border-radius: 6px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.app-area-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: var(--primary);
}

.app-area-img {
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
}

.app-area-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.app-area-card:hover .app-area-img img {
    transform: scale(1.08);
}

.app-area-info {
    padding: 16px 20px;
    background: var(--white);
}

.app-area-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.app-area-info p {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.app-area-card:hover .app-area-info {
    background: var(--primary);
}

.app-area-card:hover .app-area-info h4,
.app-area-card:hover .app-area-info p {
    color: var(--white);
}



/* ==================== 新闻动态二级页面 ==================== */
.news-page-layout {
    display: flex;
    gap: 30px;
}

.news-page-main {
    flex: 1;
    min-width: 0;
}

.news-page-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.news-list-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    border: 1px solid var(--gray-dark);
    border-radius: 6px;
    transition: var(--transition);
}

.news-list-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.news-list-img {
    width: 280px;
    flex-shrink: 0;
    border-radius: 4px;
    overflow: hidden;
    aspect-ratio: 14/9;
}

.news-list-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.news-list-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.news-list-body h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.news-list-item:hover .news-list-body h4 {
    color: var(--primary);
}

.news-list-body p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 14px;
}

.news-list-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 13px;
    color: var(--text-muted);
}

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

.news-list-meta span i {
    font-size: 13px;
}

.news-list-more {
    margin-left: auto;
    color: var(--primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.news-list-more:hover {
    color: var(--text);
    gap: 8px;
}

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



/* ==================== 联系我们二级页面 ==================== */
.contact-info-section {
    margin-bottom: 50px;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.contact-info-card {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 25px;
    border: 1px solid var(--gray-dark);
    border-radius: 6px;
    transition: var(--transition);
}

.contact-info-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--white);
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.contact-detail p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 底部：在线留言 + 地图 */
.contact-bottom-section {
    display: flex;
    gap: 40px;
}

.contact-form-wrap {
    flex: 1;
    min-width: 0;
}

.contact-form-wrap h3,
.contact-map-wrap h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.contact-form-wrap .page-section-line,
.contact-map-wrap .page-section-line {
    margin-bottom: 25px;
}

.contact-page-form .form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.contact-page-form .form-row input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--gray-dark);
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.contact-page-form .form-row input:focus {
    border-color: var(--primary);
}

.contact-page-form textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--gray-dark);
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    resize: vertical;
    margin-bottom: 15px;
    transition: var(--transition);
    font-family: inherit;
}

.contact-page-form textarea:focus {
    border-color: var(--primary);
}

.contact-page-form .btn {
    padding: 12px 30px;
    font-size: 15px;
}

.contact-map-wrap {
    flex: 1;
    min-width: 0;
}

.contact-map {
    position: relative;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--gray-dark);
}

.contact-map img {
    width: 100%;
    display: block;
}

.map-overlay {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--white);
    border-radius: 4px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.map-overlay i {
    color: #e53935;
    font-size: 18px;
}

.fst{
    font-weight: bold;
}
.sec{
    text-indent: 15px;
}