/* ============================================================
 * 灵灵九生物企业官网 —— 全站公共样式表
 * 视觉基准：首页设计稿 V3.0（明亮版）
 * 主色：#E8622B 橙 + 浅暖白底，去除压抑的黑色导航/Banner
 * 说明：本文件是所有页面共用的样式；页面独有的样式请写在各页
 *       自己的 <style> 或单独的 css 文件里，方便后续维护。
 * ============================================================ */

/* ---------- 0. 全局变量（改颜色/圆角只需改这里） ---------- */
:root {
  --lj-accent: #E8622B;          /* 唯一强调色：橙 */
  --lj-accent-dark: #d4551f;     /* 橙色加深（hover 用） */
  --lj-heading: #1A1A1A;         /* 标题深色（仅用于文字，不做大面积背景） */
  --lj-text: #333;               /* 正文主色 */
  --lj-text-sub: #7a6f6a;        /* 次要文字 */
  --lj-text-mute: #a89e98;       /* 更弱的说明文字 */
  --lj-info-bg: #FFF6F1;         /* 顶部信息条 / 浅暖底 */
  --lj-section-alt: #FBFAF9;     /* 交替区块的暖白底 */
  --lj-card-border: #f0e9e5;     /* 卡片描边 */
  --lj-img-bg: linear-gradient(135deg, #FFF0EB, #fde6da); /* 图片占位渐变 */
  --lj-banner-grad: linear-gradient(120deg, #FFF6F1 0%, #fdeee5 45%, #fff9f6 100%);
  --lj-footer-bg: #2b2b2b;       /* 页脚深色 */
  --lj-radius: 12px;
  --lj-maxw: 1200px;             /* 内容最大宽度 */
}

/* ---------- 1. Reset & 基础 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--lj-text);
  background: #fff;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* 内容容器：所有区块都用它居中 */
.container { max-width: var(--lj-maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- 2. 顶部信息条（电话/邮箱 + 语言切换） ---------- */
.header-info {
  background: var(--lj-info-bg);
  color: #8a7268;
  font-size: 12px;
  height: 36px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid #fde9df;
}
.header-info .container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.header-info .left > span, .header-info .left > a { margin-right: 22px; }
.header-info .left a { color: inherit; text-decoration: none; }
.header-info .left a:hover { color: var(--lj-accent); }
.header-info .left .icon { color: var(--lj-accent); }

/* 语言切换按钮组 */
.lang-switch { display: flex; border: 1px solid #f0d5c7; border-radius: 3px; overflow: hidden; background: #fff; }
.lang-switch span { padding: 2px 11px; font-size: 12px; cursor: pointer; color: #999; user-select: none; }
.lang-switch span.active { background: var(--lj-accent); color: #fff; }

/* ---------- 3. Logo 区 + 搜索框 ---------- */
.header-logo { background: #fff; padding: 12px 0; }
.header-logo .container { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.logo-area { display: flex; align-items: center; }
/* Logo 用老站 www.009bio.com 同款图（assets/img/logo.png，382×72，图内已含中英文公司名）。
   该文件是由 424×80 母版一次性高质量缩小得来的，显示高度必须等于原图 72px（1:1 不缩放），
   文字边缘才锐利不发虚。换 logo 时替换图片文件并同步改这里的高度。 */
.logo-img { height: 72px; width: auto; display: block; }
.search-box { display: flex; border: 1.5px solid var(--lj-accent); border-radius: 22px; overflow: hidden; width: 280px; background: #fff; flex-shrink: 0; }
.search-box input { border: none; outline: none; padding: 8px 16px; flex: 1; font-size: 13px; min-width: 0; }
.search-box button { background: var(--lj-accent); color: #fff; border: none; padding: 8px 18px; cursor: pointer; font-size: 13px; }

/* ---------- 4. 主导航 ---------- */
.header-nav { background: #fff; border-top: 1px solid #f2f2f2; box-shadow: 0 2px 10px rgba(0,0,0,0.03); position: relative; }
.header-nav .container { display: flex; justify-content: center; align-items: center; }
/* 桌面端：导航项排成一行（含"产品展示"下拉容器 div） */
.header-nav .nav-menu { display: flex; align-items: center; }
.header-nav a.nav-link { color: #555; padding: 15px 32px; font-size: 15px; letter-spacing: 1px; transition: all .2s; position: relative; }
.header-nav a.nav-link:hover { color: var(--lj-accent); }
.header-nav a.nav-link.active { color: var(--lj-accent); font-weight: 600; }
.header-nav a.nav-link.active::after {
  content: ""; position: absolute; bottom: 8px; left: 50%; transform: translateX(-50%);
  width: 24px; height: 3px; background: var(--lj-accent); border-radius: 2px;
}
/* 移动端汉堡按钮（默认隐藏，窄屏显示） */
.nav-toggle { display: none; background: none; border: none; font-size: 26px; color: var(--lj-accent); cursor: pointer; padding: 10px 0; }

/* 产品展示：鼠标悬停弹出分类下拉菜单 */
.nav-drop { position: relative; }
.nav-drop .caret { font-size: 12px; color: #c4b8b1; margin-left: 6px; display: inline-block; transition: transform .2s, color .2s; }
.nav-drop:hover .caret { transform: rotate(180deg); color: var(--lj-accent); }
.drop-menu {
  display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  min-width: 150px; background: #fff; border: 1px solid #f2f2f2; border-radius: 8px;
  box-shadow: 0 10px 28px rgba(0,0,0,.08); padding: 6px 0; z-index: 80; text-align: center;
}
.nav-drop:hover .drop-menu { display: block; }
.drop-menu a { display: block; padding: 9px 20px; font-size: 14px; color: #555; white-space: nowrap; transition: all .15s; }
.drop-menu a:hover { color: var(--lj-accent); background: #FFF7F3; }

/* ---------- 5. Banner 首屏大图 ---------- */
.banner {
  position: relative; min-height: 480px;
  background: var(--lj-banner-grad);
  display: flex; align-items: center; overflow: hidden;
}
/* Banner 装饰：分子圆点 + 连线 + 圆环（纯装饰，可保留） */
.banner .molecule { position: absolute; border-radius: 50%; }
.banner .m1 { width: 120px; height: 120px; background: radial-gradient(circle at 30% 30%, #f9b58f, #E8622B); top: 60px; right: 12%; opacity: 0.85; }
.banner .m2 { width: 60px; height: 60px; background: radial-gradient(circle at 30% 30%, #ffd9c4, #f2895b); top: 200px; right: 28%; opacity: 0.7; }
.banner .m3 { width: 40px; height: 40px; background: radial-gradient(circle at 30% 30%, #ffe9dd, #f7a878); bottom: 90px; right: 18%; opacity: 0.8; }
.banner .m4 { width: 22px; height: 22px; background: #E8622B; top: 120px; right: 40%; opacity: 0.5; }
.banner .m5 { width: 16px; height: 16px; background: #f2895b; bottom: 140px; right: 8%; opacity: 0.5; }
.banner .link-line { position: absolute; background: rgba(232,98,43,0.25); height: 2px; transform-origin: left center; }
.banner .l1 { width: 160px; top: 130px; right: 15%; transform: rotate(35deg); }
.banner .l2 { width: 120px; top: 230px; right: 22%; transform: rotate(-30deg); }
.banner .hex-grid { position: absolute; left: -40px; bottom: -40px; width: 260px; height: 260px; border: 2px solid rgba(232,98,43,0.08); border-radius: 50%; }
.banner .hex-grid::before { content: ""; position: absolute; inset: 30px; border: 2px solid rgba(232,98,43,0.06); border-radius: 50%; }
.banner-content { position: relative; z-index: 2; }
.banner-content .tagline { font-size: 14px; letter-spacing: 4px; color: var(--lj-accent); margin-bottom: 14px; font-weight: 600; }
.banner-content h1, .banner-content h2 { font-size: 44px; font-weight: 800; letter-spacing: 2px; color: var(--lj-heading); margin-top: 0.83em; margin-bottom: 16px; line-height: 1.25; }
.banner-content .hl { color: var(--lj-accent); }
.banner-content p { font-size: 16px; color: var(--lj-text-sub); max-width: 500px; margin-bottom: 30px; line-height: 1.9; }
.banner-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.banner-btn { display: inline-block; padding: 13px 40px; font-size: 15px; letter-spacing: 1px; border-radius: 26px; transition: all .3s; }
.banner-btn.primary { background: var(--lj-accent); color: #fff; box-shadow: 0 6px 18px rgba(232,98,43,0.3); }
.banner-btn.primary:hover { background: var(--lj-accent-dark); transform: translateY(-2px); }
.banner-btn.outline { border: 1.5px solid var(--lj-accent); color: var(--lj-accent); background: #fff; }
.banner-btn.outline:hover { background: var(--lj-info-bg); }

/* ---------- 6. 通用区块 & 区块标题 ---------- */
.section { padding: 68px 0; }
.section-alt { background: var(--lj-section-alt); }
.section-header { text-align: center; margin-bottom: 46px; }
.section-header h3 { font-size: 28px; color: var(--lj-heading); font-weight: 700; letter-spacing: 2px; }
.section-header .en { font-size: 14px; color: #c4b8b1; letter-spacing: 2px; margin-left: 12px; font-weight: 400; }
.section-header .divider { width: 44px; height: 3px; background: var(--lj-accent); margin: 12px auto 0; border-radius: 2px; }

/* ---------- 7. 产品分类卡片 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.cat-card { background: #fff; border: 1px solid var(--lj-card-border); border-radius: var(--lj-radius); padding: 34px 16px 26px; text-align: center; transition: all .3s; cursor: pointer; }
.cat-card:hover { border-color: var(--lj-accent); box-shadow: 0 10px 26px rgba(232,98,43,0.12); transform: translateY(-4px); }
.cat-icon { width: 68px; height: 68px; margin: 0 auto 16px; background: #FFF0EB; border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: all .3s; }
.cat-card:hover .cat-icon { background: var(--lj-accent); }
.cat-icon svg { width: 30px; height: 30px; transition: stroke .3s; }
.cat-card:hover .cat-icon svg { stroke: #fff; }
.cat-card h5 { font-size: 16px; color: var(--lj-heading); margin-bottom: 8px; font-weight: 600; }
.cat-card p { font-size: 13px; color: var(--lj-text-mute); }

/* ---------- 8. 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.product-card { background: #fff; border-radius: 10px; overflow: hidden; border: 1px solid var(--lj-card-border); transition: all .3s; cursor: pointer; position: relative; }
.product-card:hover { box-shadow: 0 10px 26px rgba(0,0,0,0.08); transform: translateY(-3px); }
.product-card .badge { position: absolute; top: 12px; left: 12px; background: var(--lj-accent); color: #fff; font-size: 12px; padding: 3px 10px; border-radius: 4px; z-index: 2; }
.product-card .card-img { height: 180px; background: var(--lj-img-bg); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.product-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
.product-card .card-img .watermark { font-size: 56px; opacity: 0.16; color: var(--lj-accent); }
.product-card .card-body { padding: 16px; }
.product-card .card-body h5 { font-size: 16px; color: var(--lj-heading); margin-bottom: 6px; font-weight: 600; }
.product-card .card-body .cas { font-size: 13px; color: var(--lj-accent); margin-bottom: 8px; }
.product-card .card-body .desc { font-size: 13px; color: var(--lj-text-mute); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.more-link { text-align: right; margin-top: 34px; }
.more-link a { color: var(--lj-accent); font-size: 14px; }
.more-link a:hover { text-decoration: underline; }

/* ---------- 9. 关于我们（左图 + 右简介） ---------- */
.about-top { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: center; }
/* 左栏：企业形象图 + 左下角分子装饰 */
.about-media { position: relative; }
.about-media .photo {
  position: relative; z-index: 1; height: 520px;
  border-radius: 6px; overflow: hidden; background: var(--lj-img-bg);
}
.about-media .photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.about-media .mol-deco { position: absolute; z-index: 0; left: -70px; bottom: -56px; width: 300px; height: 300px; }
/* 右栏：大标题 + 灰色英文公司名 */
.about-info h3 { font-size: 32px; font-weight: 700; color: var(--lj-heading); letter-spacing: 1px; margin-bottom: 10px; }
.about-info .sub { font-size: 14px; color: #a89e98; margin-bottom: 34px; }
/* 右栏：三段图标文字（图标沿用全站同款：浅橙圆底 + 橙色线条） */
.about-item { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 30px; }
.about-item:last-child { margin-bottom: 0; }
.about-item .ico {
  flex: 0 0 56px; width: 56px; height: 56px; border-radius: 50%;
  background: #FFF0EB; color: var(--lj-accent);
  display: flex; align-items: center; justify-content: center;
}
.about-item .ico svg { width: 26px; height: 26px; }
.about-item h5 { font-size: 17px; font-weight: 700; color: var(--lj-heading); margin-bottom: 8px; }
.about-item p { font-size: 14px; color: #6b625d; line-height: 1.95; text-align: justify; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-box { background: #fff; border: 1px solid var(--lj-card-border); border-radius: var(--lj-radius); padding: 32px 20px; text-align: center; transition: all .3s; }
.stat-box:hover { border-color: var(--lj-accent); box-shadow: 0 8px 20px rgba(232,98,43,0.1); }
.stat-box .num { font-size: 40px; font-weight: 800; color: var(--lj-accent); }
.stat-box .num .plus { font-size: 24px; }
.stat-box .label { font-size: 14px; color: var(--lj-text-mute); margin-top: 6px; }

/* ---------- 10. 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: #fff; border-radius: 10px; overflow: hidden; border: 1px solid var(--lj-card-border); transition: all .3s; cursor: pointer; }
.news-card:hover { box-shadow: 0 10px 26px rgba(0,0,0,0.08); transform: translateY(-3px); }
.news-card .news-img { height: 190px; background: var(--lj-img-bg); display: flex; align-items: center; justify-content: center; color: var(--lj-accent); font-size: 14px; overflow: hidden; }
.news-card .news-img img { width: 100%; height: 100%; object-fit: cover; }
.news-card .news-body { padding: 20px; }
.news-card .news-body h5 { font-size: 16px; color: var(--lj-heading); font-weight: 600; margin-bottom: 8px; line-height: 1.5; }
.news-card .news-body .date { font-size: 13px; color: #c4b8b1; margin-bottom: 10px; }
.news-card .news-body .date::before { content: "• "; color: var(--lj-accent); }
.news-card .news-body .summary { font-size: 13px; color: var(--lj-text-mute); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- 11. 页脚 ---------- */
.footer { background: var(--lj-footer-bg); color: #b8b0ab; padding: 50px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid #3d3d3d; }
.footer h6 { color: #fff; font-size: 14px; margin-bottom: 16px; letter-spacing: 1px; }
.footer p, .footer a { font-size: 13px; line-height: 2.2; }
.footer a:hover { color: var(--lj-accent); }
.footer .contact-line { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; font-size: 13px; }
.footer .contact-line .icon { color: var(--lj-accent); width: 16px; text-align: center; }
.footer .contact-line .icon svg { width: 14px; height: 12px; fill: currentColor; display: block; margin: 0 auto; }
.footer .contact-line a { color: inherit; text-decoration: none; }
.footer .contact-line a:hover { text-decoration: underline; }
.footer .quick-links a { display: block; }
.footer .footer-bottom { text-align: center; padding: 18px 0; font-size: 12px; color: #7a726d; }
.footer .footer-bottom a { color: inherit; text-decoration: none; }
.footer .footer-bottom a:hover { text-decoration: underline; }

/* ---------- 12. 右侧悬浮工具条（联系项可展开：悬停或点击后向左展开橙色详情面板） ---------- */
.float-bar { position: fixed; right: 0; top: 50%; margin-top: -100px; z-index: 999; display: flex; flex-direction: column; align-items: flex-end; border-radius: 8px 0 0 8px; overflow: hidden; /* 不能用 box-shadow：背景透明时阴影会透进条形内部形成灰块；drop-shadow 只沿可见轮廓投影 */ filter: drop-shadow(0 4px 16px rgba(0,0,0,0.12)); }
/* 每一行：收起时只有 48px 宽的方形头部（贴屏幕右缘）；展开时整行变宽，
   橙色面板从头部左侧滑出（row-reverse 保证头部始终贴右缘不移动） */
.float-bar .float-item { position: relative; display: flex; flex-direction: row-reverse; align-items: stretch; width: 48px; height: 50px; background: #fff; color: #999; cursor: pointer; transition: width .22s ease, height .22s ease; border-bottom: 1px solid #f2f2f2; text-decoration: none; overflow: hidden; }
.float-bar .float-item:hover, .float-bar .float-item.open { width: 252px; }
/* 微信行展开时额外长高，露出二维码：面板改竖排（上二维码、下微信号+复制按钮） */
.float-bar .float-item.fi-wechat:hover, .float-bar .float-item.fi-wechat.open { height: 168px; }
.float-bar .fi-panel-wx { flex-direction: column; justify-content: center; gap: 8px; padding: 10px 14px; }
.float-bar .fp-qr { width: 104px; height: 104px; padding: 3px; background: #fff; border-radius: 6px; display: block; }
.float-bar .fp-line { display: flex; align-items: center; gap: 10px; }
/* 方形头部：图标 + 小字竖排居中 */
.float-bar .fi-head { flex: 0 0 48px; display: flex; flex-direction: column; align-items: center; justify-content: center; font-size: 10px; }
.float-bar .float-item:hover .fi-head, .float-bar .float-item.open .fi-head { background: var(--lj-accent); color: #fff; }
.float-bar .float-item .f-icon { font-size: 16px; margin-bottom: 1px; }
.float-bar .float-item .f-icon svg { width: 18px; height: 15px; fill: currentColor; display: block; }
/* 展开后的橙色详情面板（单行排布：号码/按钮 + 小提示） */
.float-bar .fi-panel { flex: 0 0 204px; display: flex; align-items: center; gap: 10px; padding: 0 14px; background: var(--lj-accent); color: #fff; white-space: nowrap; }
.float-bar .fp-strong { font-size: 16px; font-weight: 800; color: #fff; text-decoration: none; letter-spacing: .3px; }
.float-bar a.fp-strong:hover { text-decoration: underline; }
.float-bar .fp-tip { font-size: 11px; opacity: .9; }
.float-bar .fp-btn { background: #fff; color: var(--lj-accent); border: none; border-radius: 12px; padding: 4px 12px; font-size: 12px; cursor: pointer; flex-shrink: 0; }
/* 顶部按钮：保持原来的橙色方形，不参与展开；它没有 .fi-head 包裹，需单独恢复竖排 */
.float-bar .float-item[data-action='top'] { flex-direction: column; align-items: center; justify-content: center; }
.float-bar .float-item[data-action='top']:hover { width: 48px; }

/* 全站轻量提示条（common.js 的 ljToast() 动态创建，如"微信号已复制"） */
#lj-toast {
  position: fixed; left: 50%; bottom: 60px;
  transform: translateX(-50%) translateY(16px);
  background: rgba(26, 26, 26, .92); color: #fff;
  font-size: 13px; padding: 10px 22px; border-radius: 20px;
  opacity: 0; pointer-events: none; transition: all .25s; z-index: 1000;
  max-width: 86vw; text-align: center;
}
#lj-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 13. 内页页头横幅 & 面包屑（列表/详情/新闻等内页共用） ---------- */
.page-banner {
  position: relative; height: 220px;
  background: linear-gradient(120deg, #FFF6F1 0%, #fdeee5 50%, #fff9f6 100%);
  display: flex; align-items: center; overflow: hidden;
  border-bottom: 1px solid #fbe7dc;
}
.page-banner .molecule { position: absolute; border-radius: 50%; }
.page-banner .m1 { width: 90px; height: 90px; background: radial-gradient(circle at 30% 30%, #f9b58f, #E8622B); top: 40px; right: 14%; opacity: 0.8; }
.page-banner .m2 { width: 46px; height: 46px; background: radial-gradient(circle at 30% 30%, #ffd9c4, #f2895b); bottom: 40px; right: 26%; opacity: 0.7; }
.page-banner .m3 { width: 20px; height: 20px; background: #E8622B; top: 60px; right: 34%; opacity: 0.5; }
.page-banner .ring { position: absolute; width: 200px; height: 200px; border: 2px solid rgba(232,98,43,0.08); border-radius: 50%; right: 6%; top: -50px; }
.page-banner .ring::before { content: ""; position: absolute; inset: 26px; border: 2px solid rgba(232,98,43,0.06); border-radius: 50%; }
.page-banner .pb-text { position: relative; z-index: 2; }
.page-banner h1, .page-banner h2, .page-banner .pb-title { font-size: 34px; color: var(--lj-heading); font-weight: 800; letter-spacing: 2px; margin: 0.83em 0; }
.page-banner .en { font-size: 14px; color: var(--lj-accent); letter-spacing: 3px; margin-top: 6px; text-transform: uppercase; }

/* 面包屑导航 */
.breadcrumb { background: #fff; border-bottom: 1px solid #f4efec; }
.breadcrumb .container { display: flex; align-items: center; height: 46px; font-size: 13px; color: #a89e98; flex-wrap: wrap; }
.breadcrumb a { color: #a89e98; }
.breadcrumb a:hover { color: var(--lj-accent); }
.breadcrumb .sep { margin: 0 8px; color: #d8cfc9; }
.breadcrumb .current { color: var(--lj-accent); }

/* 内页主体留白 */
.page-body { padding: 34px 0 60px; }

/* ============================================================
 * 14. 响应式适配（PC / 平板 / 手机）
 * 断点：>=1200 桌面；768~1199 平板；<768 手机
 * ============================================================ */

/* ---- 平板（768 ~ 1199px） ---- */
@media (max-width: 1199px) {
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .banner-content h1, .banner-content h2 { font-size: 36px; }
  .header-nav a.nav-link { padding: 15px 20px; }
}

/* ---- 手机（< 768px） ---- */
@media (max-width: 767px) {
  .section { padding: 44px 0; }

  /* 内页横幅在手机上变矮、标题变小 */
  .page-banner { height: 150px; }
  .page-banner h1, .page-banner h2, .page-banner .pb-title { font-size: 24px; }
  .page-banner .en { font-size: 12px; }
  .page-body { padding: 22px 0 40px; }
  .breadcrumb .container { height: auto; padding-top: 8px; padding-bottom: 8px; }

  /* 顶部信息条：只隐藏邮箱那一项（.left 的第 2 个直接子元素），避免拥挤；
     注意必须用 > 直接子级，否则会误伤电话链接里的号码 span */
  .header-info .left > *:nth-child(2) { display: none; }

  /* Logo 区：搜索框换行到下方并占满 */
  .header-logo .container { flex-wrap: wrap; }
  .logo-img { height: 44px; }
  .search-box { width: 100%; order: 3; margin-top: 12px; }

  /* 导航：变成汉堡菜单 */
  .header-nav .container { justify-content: flex-end; }
  .nav-toggle { display: block; }
  .header-nav .nav-menu {
    display: none;              /* 默认收起 */
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08); z-index: 50;
  }
  .header-nav .nav-menu.open { display: flex; }   /* 点击汉堡后展开 */
  .header-nav a.nav-link { padding: 14px 20px; border-bottom: 1px solid #f5f5f5; }
  .header-nav a.nav-link.active::after { display: none; }
  /* 手机没有鼠标悬停：收起下拉菜单，产品展示作为普通菜单项 */
  .nav-drop .caret { display: none; }
  .nav-drop a.nav-link { display: block; }
  .drop-menu { display: none !important; }

  /* Banner 文案缩小 */
  .banner { min-height: 380px; }
  .banner-content h1, .banner-content h2 { font-size: 28px; }
  .banner-content p { font-size: 14px; }
  .banner-btn { padding: 11px 28px; font-size: 14px; }

  /* 各类网格在手机上改为 1~2 列 */
  .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  /* 关于我们上下堆叠：图在上、简介在下 */
  .about-top { grid-template-columns: 1fr; gap: 40px; }
  .about-media .photo { height: 320px; }
  .about-media .mol-deco { left: -20px; bottom: -24px; width: 190px; height: 190px; }
  .about-info h3 { font-size: 24px; }
  .about-info .sub { margin-bottom: 24px; }

  /* 页脚堆叠 */
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }

  /* 悬浮条在手机上收起，避免遮挡 */
  .float-bar { display: none; }
}