/* ============================================================
 * honghuo · 红火 · 简约克制现代版
 * 白底为主 · 朱红主色 + 鎏金点缀 · 无装饰圈圈 · 无阴影
 * ============================================================ */

:root {
    --color-primary: #E2342A;
    --color-primary-dark: #A91F1A;
    --color-primary-deep: #6E0F0B;
    --color-primary-light: #FFF1EC;
    --color-gold: #F2B53D;
    --color-gold-light: #FFD97A;
    --color-gold-deep: #C98A1B;
    --color-bg: #FFFFFF;
    --color-bg-gray: #F8F6F3;
    --color-text: #2B2121;
    --color-text-secondary: #8A6F63;
    --color-white: #FFFFFF;
    --color-border: #EEE7E0;
    --font: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
    --transition: all .3s ease;
    --radius: 18px;
    --radius-sm: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); font-size: 15px; line-height: 1.7; color: var(--color-text); background: var(--color-bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 800; line-height: 1.3; color: var(--color-text); }
p { line-height: 1.8; }

.container { width: min(1200px, 92%); margin: 0 auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ============ 顶部通栏 ============ */
.topbar { background: var(--color-primary); color: #fff; font-size: 13px; padding: 8px 0; }
.topbar-left { display: inline-flex; align-items: center; }

/* ============ Logo 区 ============ */
.header { background: #fff; padding: 16px 0; }
.header .container { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { max-height: 50px; }
.logo-text p { font-size: 14px; color: var(--color-text-secondary); }
.header-contact { text-align: right; }
.header-contact .label { font-size: 12px; color: var(--color-text-secondary); letter-spacing: 2px; margin-bottom: 2px; }
.header-contact .phone { font-size: 25px; font-weight: 900; color: var(--color-primary); display: flex; align-items: center; gap: 10px; }
.header-contact .phone i { width: 42px; height: 42px; border-radius: 12px; background: var(--color-primary); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 18px; }

/* ============ 导航 ============ */
.navbar { background: #fff; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 100; }
.nav-list { display: flex; gap: 2px; flex-wrap: wrap; }
.nav-item { position: relative; }
.nav-link { display: block; padding: 15px 22px; font-size: 15px; font-weight: 600; color: var(--color-text); position: relative; }
.nav-link::after { content: ''; position: absolute; left: 50%; bottom: 8px; width: 0; height: 3px; border-radius: 999px; background: var(--color-primary); transform: translateX(-50%); transition: width .3s ease; }
.nav-item:hover .nav-link { color: var(--color-primary); }
.nav-item:hover .nav-link::after { width: 22px; }
.nav-item.cut .nav-link { background: var(--color-primary); color: #fff; border-radius: 999px; padding: 10px 24px; margin: 3px 2px; }
.nav-item.cut .nav-link::after { display: none; }
.nav-toggle { display: none; background: none; border: 0; font-size: 22px; color: var(--color-primary); cursor: pointer; padding: 6px 10px; }

/* ============ 区块标题 ============ */
.section { padding: 72px 0; }
.section-title { text-align: center; margin-bottom: 44px; }
.section-title h2 { font-size: clamp(26px, 3vw, 34px); font-weight: 900; letter-spacing: -.01em; }
.section-title .line { width: 44px; height: 4px; border-radius: 999px; background: var(--color-primary); margin: 14px auto 0; }
.section-title p { font-size: 14px; color: var(--color-text-secondary); max-width: 720px; margin: 16px auto 0; }

/* ============ 按钮 ============ */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 700; border: 2px solid transparent; cursor: pointer; transition: var(--transition); line-height: 1.4; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); }
.btn-outline-primary { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline-primary:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
.btn-outline { border-color: #fff; color: #fff; background: transparent; }
.btn-outline:hover { background: #fff; color: var(--color-primary); transform: translateY(-2px); }
.btn-lg { padding: 15px 36px; font-size: 16px; }

/* ============ 核心优势 ============ */
.advantages { background: #fff; }
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.advantage-item {
    border-radius: var(--radius);
    padding: 30px 24px;
    background: var(--color-bg-gray);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.advantage-item:hover { transform: translateY(-4px); border-color: var(--color-primary); background: var(--color-primary-light); }
.advantage-icon { width: 50px; height: 50px; border-radius: 14px; margin-bottom: 18px; background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 21px; }
.advantage-title { font-size: 17px; font-weight: 800; margin-bottom: 8px; }
.advantage-desc { font-size: 13px; color: var(--color-text-secondary); line-height: 1.9; }

/* ============ 产品中心 ============ */
.products { background: var(--color-bg-gray); }
.product-groups { display: flex; flex-direction: column; gap: 36px; }
.product-group-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--color-border); }
.product-group-title { font-size: 19px; font-weight: 800; display: flex; align-items: center; gap: 10px; }
.product-group-title::before { content: ''; width: 6px; height: 22px; border-radius: 999px; background: var(--color-primary); }
.product-group-more { font-size: 13px; color: var(--color-text-secondary); display: inline-flex; align-items: center; gap: 4px; }
.product-group-more:hover { color: var(--color-primary); }
.product-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--color-border); transition: var(--transition); }
.product-card:hover { transform: translateY(-4px); border-color: var(--color-primary); }
.product-card-img { height: 180px; overflow: hidden; background: var(--color-bg-gray); display: flex; align-items: center; justify-content: center; }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-body { padding: 16px 18px 18px; }
.product-card-title a { font-size: 15px; font-weight: 700; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card-title a:hover { color: var(--color-primary); }
.product-more { text-align: center; margin-top: 36px; }

/* ============ 关于我们 ============ */
.about { background: #fff; }
.about-grid { display: block; max-width: 820px; margin: 0 auto; }
.about-content h2 { font-size: clamp(24px, 2.6vw, 30px); margin-bottom: 8px; font-weight: 900; }
.about-content .subtitle { font-size: 15px; color: var(--color-text-secondary); margin-bottom: 18px; }
.about-content .lead { font-size: 14px; color: var(--color-text-secondary); line-height: 1.9; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; margin-top: 24px; }
.about-feature { display: flex; align-items: center; gap: 9px; font-size: 14px; padding: 11px 14px; background: var(--color-bg-gray); border-radius: var(--radius-sm); }
.about-feature i { color: var(--color-primary); font-size: 14px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-stat { border-radius: var(--radius); padding: 26px 16px; text-align: center; background: var(--color-bg-gray); border: 1px solid var(--color-border); transition: var(--transition); }
.about-stat:hover { border-color: var(--color-primary); transform: translateY(-3px); }
.about-stat .number { font-size: clamp(26px, 2.8vw, 34px); font-weight: 900; color: var(--color-primary); line-height: 1.2; margin-bottom: 4px; }
.about-stat .label { font-size: 13px; color: var(--color-text-secondary); }

/* ============ 应用领域 ============ */
.field-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.field-item { background: var(--color-bg-gray); border-radius: var(--radius); padding: 26px 22px; border: 1px solid var(--color-border); transition: var(--transition); }
.field-item:hover { border-color: var(--color-primary); transform: translateY(-3px); }
.field-item h4 { font-size: 16px; color: var(--color-primary); margin-bottom: 10px; }
.field-item p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.9; }

/* ============ 新闻 ============ */
.news { background: #fff; }
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.news-col { background: var(--color-bg-gray); border-radius: var(--radius); padding: 26px; }
.news-col h3 { font-size: 17px; display: flex; justify-content: space-between; align-items: center; padding-bottom: 12px; margin-bottom: 6px; border-bottom: 2px solid var(--color-border); }
.news-col h3 a { font-size: 13px; color: var(--color-text-secondary); display: inline-flex; align-items: center; gap: 4px; }
.news-col h3 a:hover { color: var(--color-primary); }
.news-col ul { padding: 0; }
.news-list-item { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 13px 2px; border-bottom: 1px dashed var(--color-border); }
.news-list-item:last-child { border-bottom: 0; }
.news-list-item .title { font-size: 14px; font-weight: 500; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-list-item .title:hover { color: var(--color-primary); }
.news-list-item .date { font-size: 12px; color: var(--color-gold-deep); background: #FFF4DE; padding: 4px 12px; border-radius: 999px; flex-shrink: 0; }

/* ============ 内页 Banner ============ */
.page-banner { background: var(--color-primary); padding: 70px 0; text-align: center; }
.page-banner h1 { font-size: clamp(28px, 3.4vw, 38px); color: #fff; margin-bottom: 8px; letter-spacing: 1px; font-weight: 900; }
.page-banner p { font-size: 15px; color: rgba(255,255,255,.92); }

.breadcrumb { background: var(--color-bg-gray); padding: 13px 0; font-size: 13px; color: var(--color-text-secondary); border-bottom: 1px solid var(--color-border); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .fa { color: var(--color-primary); margin: 0 6px; font-size: 11px; }

/* ============ 布局 ============ */
.page-layout { display: grid; grid-template-columns: 260px 1fr; gap: 32px; padding: 40px 0 60px; align-items: start; }
.sidebar-box { background: var(--color-bg-gray); border-radius: var(--radius); overflow: hidden; margin-bottom: 18px; border: 1px solid var(--color-border); }
.sidebar-product-title { background: var(--color-primary); color: #fff; font-size: 16px; font-weight: 800; padding: 15px 20px; }
.sidebar-product-menu { padding: 6px 0; }
.sidebar-product-menu li { border-bottom: 1px dashed var(--color-border); }
.sidebar-product-menu li:last-child { border-bottom: 0; }
.sidebar-product-menu a { display: flex; align-items: center; gap: 8px; padding: 12px 20px; font-size: 14px; color: var(--color-text); border-left: 3px solid transparent; }
.sidebar-product-menu a i { color: var(--color-gold-deep); font-size: 12px; }
.sidebar-product-menu a:hover, .sidebar-product-menu a.active { color: var(--color-primary); border-left-color: var(--color-primary); background: var(--color-primary-light); }
.sidebar-contact-box { padding: 20px; }
.sidebar-contact-box h4 { font-size: 15px; margin-bottom: 12px; }
.sidebar-contact-box h4 i { color: var(--color-primary); margin-right: 6px; }
.contact-label { font-size: 12px; color: var(--color-text-secondary); margin-top: 10px; }
.contact-phone { font-size: 19px; font-weight: 900; color: var(--color-primary); display: flex; align-items: center; gap: 8px; }
.contact-time { font-size: 12px; color: var(--color-text-secondary); margin-top: 4px; }
.contact-btn { margin-top: 14px; }
.main-content { min-width: 0; }

/* ============ 产品详情 ============ */
.product-detail-header { display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px; background: #fff; border-radius: var(--radius); border: 1px solid var(--color-border); padding: 26px; margin-bottom: 24px; }
.main-img { width: 100%; aspect-ratio: 1/1; object-fit: cover; border-radius: var(--radius-sm); background: var(--color-bg-gray); border: 1px solid var(--color-border); }
.product-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.product-thumbs img { width: 66px; height: 66px; object-fit: cover; border-radius: 10px; border: 2px solid transparent; cursor: pointer; transition: var(--transition); }
.product-thumbs img.active, .product-thumbs img:hover { border-color: var(--color-primary); }
.product-info h1 { font-size: clamp(22px, 2.4vw, 26px); margin-bottom: 14px; }
.product-info .description, .product-info .service { font-size: 14px; color: var(--color-text-secondary); background: var(--color-bg-gray); border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 10px; line-height: 1.9; }
.product-info .description strong, .product-info .service strong { color: var(--color-primary); font-weight: 700; }
.hotline { display: flex; align-items: center; gap: 14px; background: var(--color-primary); border-radius: 999px; padding: 15px 22px; margin: 16px 0; color: #fff; }
.hotline .label { font-size: 14px; color: #fff; opacity: .92; }
.hotline .number { font-size: 26px; font-weight: 900; color: #fff; display: flex; align-items: center; gap: 10px; }
.product-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.product-tabs-detail { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.product-tab-detail { padding: 11px 26px; border-radius: 999px; font-size: 14px; font-weight: 700; cursor: pointer; color: var(--color-text-secondary); background: var(--color-bg-gray); border: 1px solid var(--color-border); transition: var(--transition); }
.product-tab-detail:hover { color: var(--color-primary); border-color: var(--color-primary); }
.product-tab-detail.active { background: var(--color-primary); color: #fff; border-color: transparent; }
.product-tab-content { display: none; }
.product-tab-content.active { display: block; }
.product-content-body { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 28px; font-size: 14px; color: var(--color-text); line-height: 2; }
.product-content-body h2, .product-content-body h3 { color: var(--color-primary); margin: 16px 0 10px; }
.product-content-body p { margin-bottom: 12px; }
.product-content-body table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.product-content-body th { background: var(--color-primary); color: #fff; padding: 11px 13px; font-size: 13px; }
.product-content-body td { padding: 11px 13px; border: 1px solid var(--color-border); font-size: 13px; }
.product-nav { display: flex; flex-direction: column; gap: 8px; margin-top: 24px; padding: 16px 20px; background: var(--color-bg-gray); border-radius: var(--radius-sm); font-size: 13px; color: var(--color-text-secondary); }
.product-nav span a { color: var(--color-primary); }
.product-nav span a:hover { text-decoration: underline; }

.category-header { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; padding-bottom: 14px; border-bottom: 2px solid var(--color-border); }
.category-header h1 { font-size: 24px; }
.category-header h1::before { content: ''; display: inline-block; width: 6px; height: 24px; border-radius: 999px; background: var(--color-primary); margin-right: 12px; vertical-align: -4px; }
.category-products .product-list, .product-list-inner { grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* ============ 文章页 ============ */
.news-list-inner { display: flex; flex-direction: column; gap: 12px; }
.news-list-inner .news-list-item { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 16px 20px; }
.article-header { border-bottom: 2px solid var(--color-border); padding-bottom: 18px; margin-bottom: 22px; }
.article-header h1 { font-size: clamp(22px, 2.4vw, 26px); margin-bottom: 12px; }
.article-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13px; color: var(--color-text-secondary); }
.article-meta i { color: var(--color-primary); margin-right: 4px; }
.article-body { font-size: 15px; line-height: 2; }
.article-body h2, .article-body h3 { color: var(--color-primary); margin: 18px 0 10px; }
.article-body p { margin-bottom: 14px; }
.article-body img { border-radius: var(--radius-sm); margin: 12px 0; }
.article-disclaimer { margin-top: 26px; padding: 16px 20px; background: var(--color-primary-light); border-left: 4px solid var(--color-primary); border-radius: var(--radius-sm); font-size: 12px; color: #6E4B40; line-height: 1.9; }

/* ============ CTA ============ */
.cta { background: var(--color-primary); padding: 64px 0; text-align: center; color: #fff; }
.cta h2 { font-size: clamp(24px, 3vw, 30px); color: #fff; margin-bottom: 12px; font-weight: 900; }
.cta p { font-size: 14px; color: rgba(255,255,255,.9); max-width: 620px; margin: 0 auto 22px; }
.phone-big { font-size: clamp(28px, 3vw, 34px); font-weight: 900; color: var(--color-gold-light); margin-bottom: 24px; display: flex; align-items: center; justify-content: center; gap: 12px; }
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============ 页脚 ============ */
.footer { background: #1F0D0B; color: rgba(255,255,255,.85); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding: 50px 0 36px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; padding-bottom: 10px; position: relative; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 3px; border-radius: 999px; background: var(--color-primary); }
.footer-col p { font-size: 13px; color: rgba(255,255,255,.68); line-height: 1.9; margin-bottom: 10px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,.68); display: inline-flex; align-items: center; gap: 6px; }
.footer-links a::before { content: '\f105'; font-family: FontAwesome; color: var(--color-gold); font-size: 11px; }
.footer-links a:hover { color: var(--color-gold-light); }
.footer-contact { display: flex; flex-direction: column; gap: 12px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 13px; color: rgba(255,255,255,.68); }
.footer-contact i { color: var(--color-gold); width: 18px; text-align: center; }
.footer-qrcode img { width: 110px; height: 110px; object-fit: cover; border-radius: var(--radius-sm); border: 2px solid rgba(255,255,255,.2); margin-bottom: 8px; }
.footer-qrcode p { font-size: 12px; text-align: center; }
.footer-links-inline { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; font-size: 12px; display: flex; flex-wrap: wrap; gap: 6px 14px; }
.footer-links-inline a { color: rgba(255,255,255,.5); }
.footer-links-inline a:hover { color: var(--color-gold-light); }
.footer-bottom { background: #150807; padding: 16px 0; font-size: 12px; color: rgba(255,255,255,.6); }
.footer-bottom a { color: rgba(255,255,255,.68); }
.footer-bottom a:hover { color: var(--color-gold-light); }

/* ============ 分页 ============ */
.pagination { display: flex; gap: 8px; justify-content: center; margin: 32px 0 0; flex-wrap: wrap; }
.pagination span, .pagination a { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 14px; border-radius: 999px; font-size: 14px; background: #fff; border: 1px solid var(--color-border); color: var(--color-text-secondary); transition: var(--transition); }
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination .current { background: var(--color-primary); color: #fff; border-color: transparent; font-weight: 800; }

/* ============ 返回顶部 / 移动导航 ============ */
.back-to-top { position: fixed; right: 22px; bottom: 90px; width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--color-primary); color: #fff; font-size: 18px; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); z-index: 99; }
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }
.mobile-nav { display: none; position: fixed; left: 0; right: 0; bottom: 0; background: #1F0D0B; z-index: 98; border-top: 2px solid var(--color-primary); }
.mobile-nav a { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 9px 4px; font-size: 11px; color: rgba(255,255,255,.75); }
.mobile-nav a i { font-size: 16px; }
.mobile-nav a.active, .mobile-nav a:hover { color: var(--color-gold-light); }

/* ============ 响应式 ============ */
@media (max-width: 992px) {
    .advantage-grid, .field-grid, .product-list, .product-list-inner, .category-products .product-list, .news-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid, .page-layout { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .product-detail-header { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .section { padding: 48px 0; }
    .navbar { position: relative; }
    .nav-toggle { display: block; }
    .nav-list { display: none; flex-direction: column; padding: 8px 0; border-top: 1px solid var(--color-border); }
    .nav-list.open { display: flex; }
    .nav-link { padding: 12px 18px; }
    .nav-link::after { left: 22px; transform: none; }
    .nav-item.cut .nav-link { border-radius: 0; margin: 0; background: none; color: var(--color-primary); }
    .header .container { flex-direction: column; text-align: center; }
    .header-contact { text-align: center; }
    .advantage-grid, .field-grid, .product-list, .product-list-inner, .category-products .product-list, .news-grid, .about-stats { grid-template-columns: 1fr; }
    .about-features { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 26px; }
    .page-banner { padding: 44px 0; }
    .mobile-nav { display: flex; }
    .back-to-top { bottom: 68px; right: 14px; }
    body { padding-bottom: 54px; }
}