/* 基础重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Microsoft YaHei", "PingFang SC", sans-serif; color: #333; line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
.btn { display: inline-block; padding: 10px 24px; border-radius: 4px; font-weight: 500; transition: .3s; cursor: pointer; }
.btn-primary { background: #e67e22; color: #fff; }
.btn-primary:hover { background: #d35400; }
.btn-outline { border: 2px solid #1a3e72; color: #1a3e72; background: transparent; }
.btn-outline:hover { background: #1a3e72; color: #fff; }
.btn-small { padding: 6px 14px; font-size: .875rem; }
.btn-link { color: #e67e22; padding: 0; }
.btn-link:hover { text-decoration: underline; }

/* 头部导航 */
.header { background: #fff; box-shadow: 0 2px 15px rgba(0,0,0,.08); position: sticky; top: 0; z-index: 1000; }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo img { height: 40px; }
.nav-list { display: flex; gap: 25px; list-style: none; }
.nav-list li { position: relative; }
.nav-list > li > a { display: block; padding: 22px 0; font-weight: 500; border-bottom: 2px solid transparent; transition: .3s; }
.nav-list > li.active > a, .nav-list > li:hover > a { color: #1a3e72; border-bottom-color: #1a3e72; }
.sub-nav { position: absolute; top: 100%; left: 0; background: #fff; box-shadow: 0 4px 15px rgba(0,0,0,.1); min-width: 160px; display: none; border-radius: 4px; list-style: none; padding: 10px 0; }
.nav-list > li:hover .sub-nav { display: block; }
.sub-nav li a { display: block; padding: 8px 20px; color: #333; transition: background .3s; }
.sub-nav li a:hover { background: #f0f0f0; color: #1a3e72; }
.header-actions { display: flex; align-items: center; gap: 15px; }
.header-phone { color: #1a3e72; font-weight: bold; }
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* Banner */
.banner { background: linear-gradient(135deg, #0f2952, #1a3e72); color: #fff; padding: 80px 0; text-align: center; }
.banner h1 { font-size: 2.5rem; margin-bottom: 15px; }
.banner p { font-size: 1.1rem; margin-bottom: 30px; opacity: .9; }
.banner-btns { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }

/* 行业选项卡 */
.industry-tabs { padding: 60px 0; }
.industry-tabs h2 { text-align: center; margin-bottom: 30px; font-size: 1.8rem; }
.tab-head { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 30px; }
.tab-btn { padding: 10px 18px; border: 2px solid #dee2e6; background: #fff; border-radius: 30px; cursor: pointer; font-weight: 500; transition: .3s; }
.tab-btn.active, .tab-btn:hover { border-color: #1a3e72; background: #1a3e72; color: #fff; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.panel-header { text-align: center; margin-bottom: 25px; }
.panel-header h3 { font-size: 1.5rem; color: #1a3e72; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 20px; }
.product-card { background: #fff; border: 1px solid #dee2e6; border-radius: 8px; overflow: hidden; transition: .3s; }
.product-card:hover { box-shadow: 0 4px 15px rgba(0,0,0,.1); transform: translateY(-2px); }
.product-card img { width: 100%; height: 180px; object-fit: cover; }
.card-body { padding: 15px; text-align: center; }
.card-body h4 { font-size: 1rem; margin-bottom: 8px; }
.price { color: #e67e22; font-weight: bold; margin-bottom: 8px; }
.desc { font-size: .85rem; color: #666; margin-bottom: 12px; }
.panel-footer { text-align: center; }

/* 公司简介 */
.about-intro { padding: 60px 0; background: #f5f7fa; }
.about-intro .container { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.intro-content h2 { font-size: 1.8rem; color: #1a3e72; margin-bottom: 15px; }
.intro-content p { line-height: 1.8; color: #666; margin-bottom: 15px; }
.service-promise { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.promise-item { background: #fff; padding: 20px; border-radius: 8px; text-align: center; font-weight: 500; box-shadow: 0 2px 10px rgba(0,0,0,.05); }

/* 技术知识 */
.jszs-section { padding: 60px 0; }
.jszs-section .container { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.jszs-column h3 { margin-bottom: 15px; color: #1a3e72; }
.jszs-column ul { list-style: none; margin-bottom: 15px; }
.jszs-column ul li { padding: 6px 0; border-bottom: 1px dashed #dee2e6; }
.jszs-column ul li a { color: #333; }
.jszs-column ul li a:hover { color: #e67e22; }

/* 工厂实力 */
.factory-strength { background: #1a3e72; color: #fff; padding: 60px 0; text-align: center; }
.factory-strength h2 { margin-bottom: 30px; }
.strength-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 30px; }
.strength-item { background: rgba(255,255,255,.1); padding: 25px; border-radius: 8px; }
.strength-item strong { display: block; font-size: 1.8rem; margin-bottom: 5px; }
.strength-certs { display: flex; justify-content: center; gap: 30px; margin-bottom: 30px; }
.strength-certs span { background: rgba(255,255,255,.15); padding: 8px 20px; border-radius: 20px; }

/* 新闻动态 */
.news-section { padding: 60px 0; background: #f5f7fa; }
.news-section .container { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.news-column h3 { color: #1a3e72; margin-bottom: 15px; }
.news-column ul { list-style: none; }
.news-column ul li { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px dashed #dee2e6; }
.news-column .date { font-size: .85rem; color: #999; }

/* FAQ */
.faq-section { padding: 60px 0; }
.faq-section h2 { text-align: center; margin-bottom: 30px; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list dt { font-weight: bold; font-size: 1.1rem; padding: 15px 0; border-bottom: 1px solid #dee2e6; cursor: pointer; }
.faq-list dd { padding: 15px 0; border-bottom: 1px solid #dee2e6; display: none; }

/* 页脚 */
.footer { background: #222; color: #aaa; padding: 40px 0 20px; }
.footer .container { display: grid; grid-template-columns: 1fr 1fr 200px; gap: 30px; }
.footer h3, .footer h4 { color: #fff; margin-bottom: 15px; }
.footer p { margin-bottom: 8px; }
.footer-links a { display: block; color: #aaa; margin-bottom: 8px; transition: .3s; }
.footer-links a:hover { color: #e67e22; }
.footer-qrcode img { width: 120px; margin-bottom: 10px; }

/* 悬浮按钮 */
.float-buttons { position: fixed; right: 20px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 10px; z-index: 999; }
.float-btn { width: 50px; height: 50px; background: #1a3e72; color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; position: relative; font-size: 1.2rem; }
.float-btn:hover { background: #e67e22; }
.float-phone .float-text { position: absolute; right: 60px; background: #fff; color: #1a3e72; padding: 8px 15px; border-radius: 4px; white-space: nowrap; font-weight: bold; box-shadow: 0 2px 10px rgba(0,0,0,.1); display: none; }
.float-phone:hover .float-text { display: block; }
.wechat-qrcode-popup { position: absolute; right: 60px; bottom: 0; background: #fff; padding: 15px; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,.1); display: none; width: 160px; text-align: center; }
.float-wechat:hover .wechat-qrcode-popup { display: block; }
.float-wechat:hover p {color:#0f2952;}
.wechat-qrcode-popup img { width: 130px; margin-bottom: 8px; }
.float-top { visibility: hidden; opacity: 0; transition: .3s; }
.float-top.show { visibility: visible; opacity: 1; }

/* 响应式 */
@media (max-width: 768px) {
    .container { padding: 0 15px; }
    .nav-list { display: none; position: absolute; top: 70px; left: 0; right: 0; background: #fff; flex-direction: column; box-shadow: 0 4px 15px rgba(0,0,0,.1); }
    .nav-list.active { display: flex; }
    .menu-toggle { display: block; }
    .nav-list li { border-bottom: 1px solid #eee; }
    .nav-list > li > a { padding: 12px 20px; border-bottom: none; }
    .sub-nav { position: static; box-shadow: none; background: #f8f9fa; padding-left: 20px; }
    .nav-list > li.open > .sub-nav { display: block; }
    .header-actions .header-phone { display: none; }
    .banner h1 { font-size: 1.8rem; }
    .product-grid { grid-template-columns: 1fr 1fr; }
    .about-intro .container { grid-template-columns: 1fr; }
    .strength-cards { grid-template-columns: 1fr 1fr; }
    .jszs-section .container { grid-template-columns: 1fr; }
    .news-section .container { grid-template-columns: 1fr; }
    .footer .container { grid-template-columns: 1fr; text-align: center; }
    .float-buttons { right: 10px; }
}
/* ========== 页面 Banner ========== */
.page-banner {
    background: linear-gradient(135deg, #0f2952, #1a3e72);
    color: #fff;
    padding: 60px 0 40px;
    text-align: center;
}
.page-banner h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}
.page-banner p {
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 20px;
    font-size: 1.1rem;
}
.banner-breadcrumb {
    font-size: 0.9rem;
    opacity: 0.85;
}
.banner-breadcrumb a {
    color: rgba(255,255,255,0.8);
    text-decoration: underline;
}

/* ========== 面包屑（通用，列表/详情均可用） ========== */
.breadcrumb {
    background: #f8f9fa;
    padding: 10px 0;
    font-size: 0.9rem;
    color: #666;
}
.breadcrumb a {
    color: #333;
}
.breadcrumb a:hover {
    color: #e67e22;
}
/* ========== 行业筛选栏 ========== */
.industry-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 30px;
}
.filter-btn {
    padding: 6px 16px;
    border: 1px solid #dee2e6;
    border-radius: 20px;
    color: #333;
    transition: 0.3s;
    text-decoration: none;
}
.filter-btn.active,
.filter-btn:hover {
    background: #1a3e72;
    color: #fff;
    border-color: #1a3e72;
}