@charset "utf-8";
/* 云南威朗 官网模板 - 主样式
   设计：响应式、移动优先、语义化结构
   配色：工业蓝（主）+ 橙色（行动点） */

:root {
  --brand: #0b4da2;
  --brand-d: #083a7a;
  --brand-l: #eaf2fc;
  --accent: #f26b1a;
  --accent-d: #d95a0e;
  --ink: #1b2430;
  --ink-2: #4a5563;
  --ink-3: #8a94a6;
  --line: #e4e9f0;
  --bg: #ffffff;
  --bg-2: #f5f8fc;
  --bg-3: #eef3f9;
  --ok: #1f9254;
  --radius: 8px;
  --radius-l: 14px;
  --shadow: 0 6px 24px rgba(11, 77, 162, .10);
  --shadow-h: 0 12px 32px rgba(11, 77, 162, .18);
  --wrap: 1200px;
  --header-h: 72px;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand); }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }
button, input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; outline: none; }
strong, b { font-weight: 600; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

/* ============ 通用排版 ============ */
.sec { padding: 56px 0; }
.sec-alt { background: var(--bg-2); }
.sec-head { text-align: center; margin-bottom: 36px; }
.sec-head h2 {
  font-size: 30px; font-weight: 700; letter-spacing: 1px; color: var(--ink);
  position: relative; padding-bottom: 14px;
}
.sec-head h2 em { color: var(--brand); font-style: normal; }
.sec-head h2::after {
  content: ""; position: absolute; left: 50%; bottom: 0; width: 56px; height: 3px;
  transform: translateX(-50%); background: var(--accent); border-radius: 2px;
}
.sec-head p { color: var(--ink-2); font-size: 15px; margin-top: 12px; }
.sec-head .kw { color: var(--ink-3); font-size: 13px; margin-top: 6px; }

.more { display: inline-block; margin-top: 24px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 0 22px; border-radius: var(--radius);
  font-size: 15px; font-weight: 500; border: 1px solid transparent; cursor: pointer;
  transition: all .22s; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-d); color: #fff; }
.btn-brand { background: var(--brand); color: #fff; }
.btn-brand:hover { background: var(--brand-d); color: #fff; }
.btn-ghost { border-color: #fff; color: #fff; background: rgba(255, 255, 255, .12); }
.btn-ghost:hover { background: #fff; color: var(--brand); }
.btn-line { border-color: var(--line); color: var(--ink-2); background: #fff; }
.btn-line:hover { border-color: var(--brand); color: var(--brand); }
.btn-block { display: flex; width: 100%; }

/* ============ 顶部条 ============ */
.topbar { background: var(--brand-d); color: #cfdcee; font-size: 13px; }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 38px; gap: 12px; }
.topbar .tb-l { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar .tb-r { display: flex; align-items: center; gap: 16px; white-space: nowrap; }
.topbar a { color: #cfdcee; }
.topbar a:hover { color: #fff; }

/* ============ 头部 ============ */
.site-header { background: #fff; border-bottom: 1px solid var(--line); position: relative; z-index: 60; }
.site-header.is-fixed { position: fixed; top: 0; left: 0; right: 0; box-shadow: var(--shadow); animation: drop .28s ease; }
@keyframes drop { from { transform: translateY(-100%); } to { transform: none; } }
.hd-wrap { display: flex; align-items: center; gap: 20px; min-height: var(--header-h); }
.logo { flex: 0 0 auto; display: flex; align-items: center; }
.logo img { max-height: 48px; width: auto; }
.logo-txt { line-height: 1.2; }
.logo-txt b { display: block; font-size: 21px; color: var(--brand); letter-spacing: 2px; }
.logo-txt span { display: block; font-size: 11px; color: var(--ink-3); letter-spacing: 2px; text-transform: uppercase; }

/* 导航：固定 8 项，不换行、不溢出；除尘产品 / 袋笼设备 为 Mega 菜单 */
.nav { flex: 1 1 auto; min-width: 0; }
.nav > ul { display: flex; flex-wrap: nowrap; }
.nav > ul > li { position: relative; flex: 0 0 auto; }
.nav > ul > li > a {
  display: block; padding: 0 11px; height: var(--header-h); line-height: var(--header-h);
  font-size: 15px; color: var(--ink); position: relative; white-space: nowrap;
}
.nav > ul > li > a .arw {
  display: inline-block; width: 0; height: 0; margin-left: 5px; vertical-align: 3px;
  border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 5px solid var(--ink-3);
}
.nav > ul > li > a::after {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: 18px; height: 2px;
  background: var(--accent); transform: scaleX(0); transition: transform .22s;
}
.nav > ul > li:hover > a, .nav > ul > li.on > a { color: var(--brand); }
.nav > ul > li:hover > a .arw { border-top-color: var(--brand); }
.nav > ul > li:hover > a::after, .nav > ul > li.on > a::after { transform: scaleX(1); }

/* Mega 菜单 */
.nav .mega {
  display: none; position: absolute; top: 100%; left: 0; min-width: 260px; z-index: 80;
  background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--brand);
  box-shadow: var(--shadow); border-radius: 0 0 var(--radius) var(--radius); padding: 20px;
}
/* Mega 菜单横向铺满头部，内容与 .wrap 对齐，避免溢出屏幕 */
.nav > ul > li.has-mega { position: static; }
.nav .mega-wide {
  left: 0; right: 0; width: auto; min-width: 0; padding: 22px 0;
  display: none; grid-template-columns: minmax(0, 1fr);
}
.nav .mega-wide .mega-inner {
  display: grid; grid-template-columns: 1.1fr 1.3fr 1fr; gap: 26px;
  width: var(--wrap); max-width: calc(100% - 40px); margin: 0 auto;
}
.nav > ul > li.has-mega:hover .mega-wide { display: grid; }
@media (max-width: 1280px) {
  .nav .mega-wide .mega-inner { grid-template-columns: 1fr 1.2fr; }
  .nav .mega-tip { display: none; }
  .nav > ul > li > a { padding: 0 8px; font-size: 14.5px; }
  .hd-tel .tel-num { font-size: 19px; }
  .hd-quote { padding: 0 11px; font-size: 13.5px; }
}
.nav > ul > li.has-drop:hover .mega { display: block; }
.nav .mega h4 {
  font-size: 13px; color: var(--brand); margin-bottom: 12px; padding-bottom: 8px;
  border-bottom: 1px solid var(--line); letter-spacing: 1px;
}
.nav .mega-col > ul { display: flex; flex-direction: column; gap: 4px; }
.nav .mega-col > ul > li > a { display: block; padding: 8px 10px; border-radius: 6px; }
.nav .mega-col > ul > li > a:hover { background: var(--brand-l); }
.nav .mega-col > ul > li > a b { display: block; font-size: 15px; color: var(--ink); font-weight: 600; }
.nav .mega-col > ul > li > a span {
  display: block; font-size: 12.5px; color: var(--ink-3); margin-top: 3px; line-height: 1.5;
}
.nav .mega-pro ul { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.nav .mega-pro li a { display: block; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; padding: 0; }
.nav .mega-pro li a:hover { border-color: var(--brand); }
.nav .mega-pro img { display: block; width: 100%; height: 92px; object-fit: cover; background: var(--bg-2); }
.nav .mega-pro span {
  display: block; font-size: 13px; padding: 7px 8px; color: var(--ink-2);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.nav .mega-tip p { font-size: 13px; color: var(--ink-2); line-height: 1.8; margin-bottom: 14px; }
.nav .mega-tip .btn { width: 100%; }
.nav .mega-inline { display: flex; flex-wrap: wrap; gap: 8px; }
.nav .mega-inline li a {
  display: block; padding: 7px 14px; font-size: 14px; border: 1px solid var(--line);
  border-radius: 20px; color: var(--ink-2);
}
.nav .mega-inline li a:hover { background: var(--brand); border-color: var(--brand); color: #fff; }

.hd-quote {
  flex: 0 0 auto; display: block; padding: 0 14px; height: 36px; line-height: 36px;
  background: var(--accent); color: #fff; border-radius: 4px; font-size: 14px; white-space: nowrap;
}
.hd-quote:hover { background: var(--accent-d); color: #fff; }

.hd-tel { flex: 0 0 auto; display: flex; align-items: center; gap: 12px; }
.hd-tel .tel-num { font-size: 22px; font-weight: 700; color: var(--accent); line-height: 1.1; letter-spacing: .5px; }
.hd-tel .tel-note { font-size: 12px; color: var(--ink-3); }

.hd-toggle { display: none; width: 44px; height: 44px; border: 0; background: none; cursor: pointer; padding: 10px; }
.hd-toggle i { display: block; height: 2px; background: var(--ink); margin: 5px 0; transition: .25s; }
.hd-toggle.on i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hd-toggle.on i:nth-child(2) { opacity: 0; }
.hd-toggle.on i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 搜索 */
.hd-search { flex: 0 0 auto; position: relative; }
.hd-search-btn { width: 44px; height: 44px; border: 0; background: none; cursor: pointer; color: var(--ink); }
.hd-search-box { display: none; }
.hd-search.open .hd-search-box {
  display: flex; position: absolute; right: 0; top: 100%; width: 300px;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); padding: 8px; border-radius: var(--radius);
}
.hd-search-box input { flex: 1; border: 0; padding: 0 10px; height: 40px; }
.hd-search-box button { width: 62px; border: 0; background: var(--brand); color: #fff; border-radius: 6px; cursor: pointer; }

/* ============ 移动抽屉 ============ */
.drawer-mask { display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, .45); z-index: 90; }
.drawer-mask.on { display: block; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: 78%; max-width: 320px; background: #fff; z-index: 100;
  transform: translateX(100%); transition: transform .28s; overflow-y: auto; padding-bottom: 24px;
}
.drawer.on { transform: none; }
.drawer .d-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.drawer .d-head b { color: var(--brand); font-size: 17px; }
.drawer .d-close { border: 0; background: none; font-size: 24px; line-height: 1; cursor: pointer; color: var(--ink-3); width: 44px; height: 44px; }
.drawer ul li a { display: block; padding: 13px 16px; border-bottom: 1px solid var(--line); font-size: 15px; }
.drawer ul li ul li a { padding-left: 30px; font-size: 14px; color: var(--ink-2); background: var(--bg-2); }
.drawer .d-tel { padding: 18px 16px; }
.drawer .d-tel a { display: flex; align-items: center; justify-content: center; }

/* ============ 首屏 ============ */
.hero { position: relative; background: var(--brand-d); overflow: hidden; }
.hero-stage { position: relative; }
.hero-slides { position: relative; height: 460px; }
.hero-slides .hs-item { position: absolute; inset: 0; opacity: 0; transition: opacity .7s; }
.hero-slides .hs-item.on { opacity: 1; }
.hero-slides .hs-item img { width: 100%; height: 100%; object-fit: cover; }
.hero-slides::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6, 40, 84, .88) 0%, rgba(6, 40, 84, .55) 55%, rgba(6, 40, 84, .25) 100%); }
.hero-dots { position: absolute; left: 0; right: 0; bottom: 18px; z-index: 3; display: flex; justify-content: center; gap: 8px; }
.hero-dots button { width: 10px; height: 10px; border-radius: 50%; border: 0; background: rgba(255, 255, 255, .45); cursor: pointer; padding: 0; }
.hero-dots button.on { background: var(--accent); width: 26px; border-radius: 5px; }

.hero-inner { position: relative; z-index: 2; }
.hero-box { position: absolute; inset: 0; display: flex; align-items: center; z-index: 2; pointer-events: none; }
.hero-box .wrap { pointer-events: auto; }
.hero-txt { max-width: 660px; color: #fff; }
.hero-txt .ht-tag { display: inline-block; background: rgba(242, 107, 26, .92); font-size: 13px; padding: 3px 12px; border-radius: 20px; margin-bottom: 14px; }
.hero-txt h1 { font-size: 40px; line-height: 1.25; font-weight: 700; letter-spacing: 1px; text-shadow: 0 2px 12px rgba(0, 0, 0, .3); }
.hero-txt h1 em { font-style: normal; color: #ffb084; }
.hero-txt .ht-sub { margin-top: 14px; font-size: 17px; color: #d8e5f7; }
.hero-txt .ht-sub b { color: #fff; font-weight: 600; }
.hero-txt .ht-kw { margin-top: 10px; font-size: 14px; color: #a9c1e0; }
.hero-txt .ht-btns { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-txt .ht-tel { margin-top: 18px; font-size: 15px; color: #d8e5f7; }
.hero-txt .ht-tel b { font-size: 24px; color: #ffb084; font-weight: 700; vertical-align: -2px; }

/* 首屏数据条 */
.hero-bar { background: rgba(255, 255, 255, .96); position: relative; z-index: 3; }
.hero-bar ul { display: grid; grid-template-columns: repeat(4, 1fr); }
.hero-bar li { padding: 18px 10px; text-align: center; border-right: 1px solid var(--line); }
.hero-bar li:last-child { border-right: 0; }
.hero-bar li b { display: block; font-size: 19px; color: var(--brand); font-weight: 700; }
.hero-bar li span { font-size: 13px; color: var(--ink-2); }

/* ============ 产品分类 ============ */
.cate-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cate-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-l); overflow: hidden; transition: .25s; }
.cate-card:hover { box-shadow: var(--shadow-h); transform: translateY(-4px); border-color: #c9dcf5; }
.cate-card .cc-img { position: relative; padding-top: 68%; background: var(--bg-3); overflow: hidden; }
.cate-card .cc-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cate-card .cc-body { padding: 14px 16px 18px; }
.cate-card h3 { font-size: 17px; font-weight: 600; }
.cate-card h3 a { display: block; }
.cate-card p { font-size: 13px; color: var(--ink-2); margin-top: 6px; line-height: 1.7; height: 44px; overflow: hidden; }
.cate-card .cc-tag { margin-top: 10px; font-size: 12px; color: var(--ink-3); }

/* ============ 产品列表 ============ */
.pro-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pro-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .25s; }
.pro-card:hover { box-shadow: var(--shadow-h); transform: translateY(-4px); }
.pro-card .pc-img { position: relative; padding-top: 78%; background: var(--bg-3); overflow: hidden; }
.pro-card .pc-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.pro-card:hover .pc-img img { transform: scale(1.06); }
.pro-card .pc-body { padding: 12px 14px 16px; text-align: center; }
.pro-card h3 { font-size: 15px; font-weight: 500; line-height: 1.5; height: 45px; overflow: hidden; }
.pro-card .pc-desc { font-size: 12px; color: var(--ink-3); margin-top: 4px; height: 22px; overflow: hidden; }
.pro-card .pc-btn { margin-top: 10px; display: inline-block; font-size: 13px; color: var(--accent); }

/* ============ 行业 ============ */
.ind-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ind-card { position: relative; border-radius: var(--radius-l); overflow: hidden; background: var(--brand-d); min-height: 190px; display: flex; align-items: flex-end; }
.ind-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.ind-card .ic-body { position: relative; padding: 20px; color: #fff; }
.ind-card h3 { font-size: 19px; font-weight: 600; }
.ind-card p { font-size: 13px; color: #dbe6f6; margin-top: 6px; line-height: 1.7; }
.ind-card .ic-link { display: inline-block; margin-top: 10px; font-size: 13px; color: #ffb084; }

/* ============ 优势 ============ */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.adv-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-l); padding: 26px 20px; text-align: center; transition: .25s; }
.adv-item:hover { border-color: #c9dcf5; box-shadow: var(--shadow); }
.adv-item .ai-ico { width: 62px; height: 62px; margin: 0 auto 14px; border-radius: 50%; background: var(--brand-l); display: flex; align-items: center; justify-content: center; }
.adv-item .ai-ico svg { width: 30px; height: 30px; fill: var(--brand); }
.adv-item h3 { font-size: 17px; font-weight: 600; }
.adv-item p { font-size: 13px; color: var(--ink-2); margin-top: 8px; line-height: 1.75; }

/* ============ 案例 ============ */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { background: #fff; border-radius: var(--radius-l); overflow: hidden; border: 1px solid var(--line); }
.case-card .cs-img { position: relative; padding-top: 62%; background: var(--bg-3); overflow: hidden; }
.case-card .cs-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.case-card .cs-body { padding: 14px 16px 18px; }
.case-card h3 { font-size: 16px; font-weight: 600; }
.case-card p { font-size: 13px; color: var(--ink-2); margin-top: 6px; height: 46px; overflow: hidden; }

/* ============ 新闻 ============ */
.news-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 30px; }
.news-item { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.news-item .ni-date { flex: 0 0 62px; text-align: center; background: var(--bg-2); border-radius: 6px; padding: 6px 0; height: 62px; }
.news-item .ni-date b { display: block; font-size: 22px; color: var(--brand); line-height: 1.1; font-weight: 700; }
.news-item .ni-date span { font-size: 12px; color: var(--ink-3); }
.news-item .ni-txt { flex: 1; min-width: 0; }
.news-item h3 { font-size: 16px; font-weight: 500; line-height: 1.5; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-item p { font-size: 13px; color: var(--ink-2); margin-top: 4px; height: 44px; overflow: hidden; line-height: 1.7; }

/* ============ 区域 ============ */
.region-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.region-tags a { display: inline-block; padding: 8px 18px; border: 1px solid var(--line); border-radius: 30px; background: #fff; font-size: 15px; }
.region-tags a:hover { background: var(--brand); color: #fff; border-color: var(--brand); }

/* 服务区域：三省分组 */
.region-prov { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.rp-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-l); padding: 20px 18px; }
.rp-item:hover { border-color: var(--brand); box-shadow: var(--shadow); }
.rp-head { text-align: center; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px dashed var(--line); }
.rp-head b { display: block; font-size: 20px; color: var(--brand); }
.rp-head span { display: block; font-size: 12.5px; color: var(--ink-3); margin-top: 4px; }
.rp-item .region-tags { gap: 8px; }
.rp-item .region-tags a { padding: 6px 12px; font-size: 13.5px; }
@media (max-width: 900px) { .region-prov { grid-template-columns: 1fr; } }

/* ============ FAQ ============ */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; background: #fff; overflow: hidden; }
.faq-item .fq-q { padding: 14px 50px 14px 18px; position: relative; cursor: pointer; font-size: 16px; font-weight: 600; }
.faq-item .fq-q::after {
  content: ""; position: absolute; right: 20px; top: 22px; width: 8px; height: 8px;
  border-right: 2px solid var(--ink-3); border-bottom: 2px solid var(--ink-3); transform: rotate(45deg); transition: .25s;
}
.faq-item.on .fq-q::after { transform: rotate(-135deg); }
.faq-item .fq-a { display: none; padding: 0 18px 16px; font-size: 15px; color: var(--ink-2); border-top: 1px dashed var(--line); padding-top: 14px; }
.faq-item.on .fq-a { display: block; }
.faq-item .fq-a p { text-indent: 2em; margin-bottom: 6px; }

/* ============ 关于 ============ */
.about-box { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
.about-img { border-radius: var(--radius-l); overflow: hidden; }
.about-txt h2 { font-size: 28px; font-weight: 700; }
.about-txt h2 em { color: var(--brand); font-style: normal; }
.about-txt .at-desc { margin-top: 16px; color: var(--ink-2); }
.about-txt .at-desc p { text-indent: 2em; margin-bottom: 8px; }
.about-txt .at-list { margin-top: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; }
.about-txt .at-list li { font-size: 14px; color: var(--ink-2); padding-left: 18px; position: relative; }
.about-txt .at-list li::before { content: ""; position: absolute; left: 0; top: 11px; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }

/* ============ CTA ============ */
.cta-band { background: linear-gradient(120deg, var(--brand-d), var(--brand)); color: #fff; padding: 40px 0; }
.cta-band .cb-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band h3 { font-size: 24px; font-weight: 700; }
.cta-band p { color: #cfe0f7; font-size: 15px; margin-top: 6px; }
.cta-band .cb-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ============ 面包屑 & 内页头 ============ */
.crumb { background: var(--bg-2); border-bottom: 1px solid var(--line); font-size: 13px; color: var(--ink-2); }
.crumb .wrap { min-height: 44px; display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.crumb a { color: var(--ink-2); }
.crumb a:hover { color: var(--brand); }
.crumb span { color: var(--ink-3); }

.page-banner { position: relative; background: linear-gradient(120deg, #083a7a, #0b4da2 60%, #1263c8); color: #fff; padding: 46px 0 40px; overflow: hidden; }
.page-banner::after {
  content: ""; position: absolute; right: -60px; top: -60px; width: 320px; height: 320px;
  background: rgba(255, 255, 255, .06); border-radius: 50%;
}
.page-banner h1 { font-size: 32px; font-weight: 700; letter-spacing: 1px; position: relative; }
.page-banner p { color: #cfe0f7; font-size: 15px; margin-top: 8px; position: relative; max-width: 720px; }

/* ============ 内页布局 ============ */
.main-wrap { padding: 36px 0 56px; }
.layout { display: grid; grid-template-columns: 240px 1fr; gap: 30px; align-items: start; }
.side { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.side h3 { background: var(--brand); color: #fff; font-size: 17px; padding: 12px 16px; font-weight: 600; }
.side ul { padding: 8px 0; }
.side ul li a { display: block; padding: 10px 16px; font-size: 15px; color: var(--ink-2); border-left: 3px solid transparent; }
.side ul li a:hover, .side ul li.on a { background: var(--brand-l); color: var(--brand); border-left-color: var(--accent); }
.side-box { border: 1px solid var(--line); border-radius: var(--radius); margin-top: 18px; padding: 18px; background: var(--bg-2); }
.side-box h4 { font-size: 16px; margin-bottom: 10px; color: var(--brand); }
.side-box .sb-tel { font-size: 22px; font-weight: 700; color: var(--accent); line-height: 1.2; }
.side-box p { font-size: 13px; color: var(--ink-2); margin-top: 4px; }

.content { min-width: 0; }
.content-head { border-bottom: 2px solid var(--brand-l); padding-bottom: 10px; margin-bottom: 20px; }
.content-head h2 { font-size: 22px; font-weight: 700; }
.content-head .ch-note { font-size: 13px; color: var(--ink-3); margin-top: 4px; }

/* 筛选/子分类条 */
.subnav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.subnav a { padding: 7px 16px; border: 1px solid var(--line); border-radius: 30px; font-size: 14px; background: #fff; }
.subnav a:hover, .subnav a.on { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ============ 正文排版 ============ */
.article { font-size: 16px; line-height: 1.8; color: var(--ink); }
.article p { text-indent: 2em; margin-bottom: 14px; }
.article h2 { font-size: 21px; margin: 26px 0 12px; padding-left: 12px; border-left: 4px solid var(--brand); line-height: 1.4; }
.article h3 { font-size: 18px; margin: 20px 0 10px; color: var(--brand-d); }
.article ul, .article ol { margin: 10px 0 14px 2em; }
.article ul li { list-style: disc; margin-bottom: 6px; }
.article ol li { list-style: decimal; margin-bottom: 6px; }
.article img { max-width: 100%; height: auto; margin: 12px auto; border-radius: 6px; }
.article table { margin: 16px 0; border: 1px solid var(--line); font-size: 15px; }
.article table th, .article table td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.article table th { background: var(--bg-2); font-weight: 600; }
.article blockquote { border-left: 4px solid var(--accent); background: var(--bg-2); padding: 12px 16px; margin: 14px 0; color: var(--ink-2); }
.article a { color: var(--brand); text-decoration: underline; }

.art-head { text-align: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); margin-bottom: 22px; }
.art-head h1 { font-size: 27px; line-height: 1.45; font-weight: 700; }
.art-meta { font-size: 13px; color: var(--ink-3); margin-top: 12px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* 参数表 */
.spec-table { width: 100%; border: 1px solid var(--line); margin: 14px 0 22px; font-size: 15px; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 11px 14px; }
.spec-table th { width: 130px; background: var(--bg-2); color: var(--ink-2); font-weight: 600; text-align: left; }
.spec-table td { color: var(--ink); }
.spec-table .todo { color: var(--ink-3); }

/* 详情页 hero */
.detail-top { display: grid; grid-template-columns: 460px 1fr; gap: 32px; align-items: start; }
.gallery { border: 1px solid var(--line); border-radius: var(--radius-l); overflow: hidden; background: #fff; }
.gallery .g-main { position: relative; padding-top: 78%; background: var(--bg-3); }
.gallery .g-main img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.gallery .g-thumbs { display: flex; gap: 8px; padding: 10px; }
.gallery .g-thumbs button { flex: 1; border: 1px solid var(--line); background: #fff; padding: 0; cursor: pointer; border-radius: 6px; overflow: hidden; height: 62px; }
.gallery .g-thumbs button.on { border-color: var(--brand); }
.gallery .g-thumbs img { width: 100%; height: 100%; object-fit: cover; }

.detail-info h1 { font-size: 27px; line-height: 1.4; font-weight: 700; }
.detail-info .di-sub { color: var(--ink-2); margin-top: 10px; font-size: 15px; }
.detail-info .di-kw { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px; }
.detail-info .di-kw span { background: var(--brand-l); color: var(--brand); font-size: 13px; padding: 4px 12px; border-radius: 4px; }
.detail-info .di-ask { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.detail-info .di-tel { margin-top: 16px; font-size: 15px; color: var(--ink-2); }
.detail-info .di-tel b { font-size: 24px; color: var(--accent); font-weight: 700; }

/* 询价表单 */
.ask-form { background: var(--bg-2); border-radius: var(--radius-l); padding: 24px; margin-top: 28px; }
.ask-form h3 { font-size: 19px; margin-bottom: 4px; }
.ask-form .af-note { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.ask-form .af-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.ask-form input, .ask-form textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; background: #fff; min-height: 44px;
}
.ask-form textarea { min-height: 90px; resize: vertical; }
.ask-form .af-item { margin-bottom: 14px; }
.ask-form .af-sub { margin-top: 6px; }

/* 详情页 tab */
.detail-body { margin-top: 40px; }
.tab-nav { display: flex; border-bottom: 2px solid var(--brand-l); gap: 4px; flex-wrap: wrap; }
.tab-nav button {
  border: 0; background: none; padding: 12px 22px; font-size: 16px; cursor: pointer; color: var(--ink-2);
  border-bottom: 2px solid transparent; margin-bottom: -2px;
}
.tab-nav button.on { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }
.tab-panel { display: none; padding-top: 22px; }
.tab-panel.on { display: block; }

/* ============ 相关推荐 ============ */
.relate { margin-top: 40px; }
.relate h3 { font-size: 20px; padding-left: 12px; border-left: 4px solid var(--brand); margin-bottom: 18px; }

/* ============ 分页 ============ */
.pager { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-top: 34px; }
.pager a, .pager span {
  display: inline-block; min-width: 38px; height: 38px; line-height: 36px; text-align: center; padding: 0 10px;
  border: 1px solid var(--line); border-radius: 6px; font-size: 14px; background: #fff; color: var(--ink-2);
}
.pager a:hover { border-color: var(--brand); color: var(--brand); }
.pager .on { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ============ 联系页 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.contact-info { background: var(--bg-2); border-radius: var(--radius-l); padding: 26px; }
.contact-info h3 { font-size: 20px; margin-bottom: 16px; }
.contact-info li { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.contact-info li b { flex: 0 0 76px; color: var(--ink-3); font-weight: 400; }
.contact-info li span { flex: 1; color: var(--ink); }
.contact-info .ci-tel { font-size: 24px; color: var(--accent); font-weight: 700; }

/* ============ 页脚 ============ */
.site-footer { background: #12263f; color: #a9b8cc; font-size: 14px; }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; padding: 46px 0 30px; }
.footer-main h4 { color: #fff; font-size: 16px; margin-bottom: 14px; font-weight: 600; }
.footer-main .fm-about p { line-height: 1.8; margin-top: 12px; }
.footer-main .fm-about .fm-tel { font-size: 22px; color: var(--accent); font-weight: 700; margin-top: 10px; }
.footer-main ul li { padding: 5px 0; }
.footer-main ul li a { color: #a9b8cc; }
.footer-main ul li a:hover { color: #fff; }
.footer-main .fm-qr { width: 118px; background: #fff; padding: 6px; border-radius: 6px; margin-top: 10px; }
.footer-main .fm-qr img { width: 100%; }

.footer-link { border-top: 1px solid rgba(255, 255, 255, .1); padding: 14px 0; font-size: 13px; color: #8296ae; }
.footer-link a { color: #8296ae; }
.footer-link a:hover { color: #fff; }

.copyright { background: #0c1a2c; padding: 18px 0; font-size: 13px; color: #7d8fa6; text-align: center; line-height: 1.9; }
.copyright a { color: #7d8fa6; }
.copyright a:hover { color: #fff; }

/* ============ 悬浮客服 ============ */
.fixed-bar { position: fixed; right: 12px; bottom: 78px; z-index: 80; display: flex; flex-direction: column; gap: 8px; }
.fixed-bar .fb-item {
  width: 52px; height: 52px; border-radius: 50%; background: #fff; border: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer;
  box-shadow: var(--shadow); font-size: 11px; color: var(--ink-2); position: relative;
}
.fixed-bar .fb-item svg { width: 20px; height: 20px; fill: var(--brand); }
.fixed-bar .fb-item:hover { background: var(--brand); color: #fff; }
.fixed-bar .fb-item:hover svg { fill: #fff; }
.fixed-bar .fb-tel { background: var(--accent); border-color: var(--accent); color: #fff; }
.fixed-bar .fb-tel svg { fill: #fff; }
.fixed-bar .fb-pop {
  display: none; position: absolute; right: 62px; top: 50%; transform: translateY(-50%);
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: var(--radius);
  padding: 12px; width: 150px; text-align: center; color: var(--ink);
}
.fixed-bar .fb-item:hover .fb-pop { display: block; }
.fixed-bar .fb-pop img { width: 100%; }
.fixed-bar .fb-pop b { display: block; color: var(--accent); font-size: 17px; }
#backTop { cursor: pointer; }

/* 移动端底部工具条 */
.mbar { display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 85; background: #fff; border-top: 1px solid var(--line); }
.mbar ul { display: grid; grid-template-columns: repeat(4, 1fr); }
.mbar a { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 56px; font-size: 12px; color: var(--ink-2); }
.mbar a svg { width: 20px; height: 20px; fill: var(--brand); margin-bottom: 2px; }
.mbar a.mb-tel { background: var(--accent); color: #fff; }
.mbar a.mb-tel svg { fill: #fff; }

/* ============ 网站地图 ============ */
.map-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.map-col h3 { font-size: 16px; color: var(--brand); margin-bottom: 10px; border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.map-col ul li { padding: 4px 0; font-size: 14px; }
.map-col ul li a { color: var(--ink-2); }

/* ============ 消息提示 ============ */
.form-tip { font-size: 13px; margin-top: 8px; }
.form-tip.ok { color: var(--ok); }
.form-tip.err { color: #d64545; }

/* ============ 列表页（全宽，无产品分类导航） ============ */
.cat-intro {
  background: var(--bg-2); border-left: 4px solid var(--brand); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px; margin: 0 0 26px;
}
.cat-intro p { color: var(--ink-2); font-size: 15px; line-height: 1.9; }
.cat-intro p + p { margin-top: 8px; }
.pro-grid-4 { grid-template-columns: repeat(4, 1fr); }
.ask-inline {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  margin: 30px 0; padding: 22px 26px; border: 1px solid var(--line);
  border-radius: var(--radius-l); background: linear-gradient(90deg, var(--brand-l), #fff);
}
.ask-inline h3 { font-size: 19px; color: var(--ink); }
.ask-inline p { margin-top: 6px; font-size: 14px; color: var(--ink-2); }
.ask-inline .ai-btns { display: flex; gap: 12px; flex: 0 0 auto; }

/* ============ 页脚城市分站 ============ */
.city-station { border-top: 1px solid var(--line); padding: 26px 0 6px; }
.city-station h4 { font-size: 15px; margin-bottom: 12px; }
.city-station .cs-prov { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 10px; flex-wrap: wrap; }
.city-station .cs-prov > b {
  flex: 0 0 52px; font-size: 14px; color: var(--brand); padding-top: 4px;
}
.city-station .cs-list { flex: 1 1 auto; display: flex; flex-wrap: wrap; gap: 6px 4px; }
.city-station .cs-list a { font-size: 13px; color: var(--ink-2); padding: 3px 8px; border-radius: 4px; }
.city-station .cs-list a:hover { background: var(--brand-l); color: var(--brand); }

/* ============ 应用行业 · 除尘解决方案 ============ */
.pb-industry { padding: 52px 0 44px; }
.pb-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; position: relative; }
.pb-chips span {
  padding: 5px 14px; border: 1px solid rgba(255, 255, 255, .45); border-radius: 30px;
  font-size: 13px; color: #e6effa; background: rgba(255, 255, 255, .08);
}

.ind-grid-all { grid-template-columns: repeat(4, 1fr); margin-top: 8px; }
.ind-grid-mini { grid-template-columns: repeat(4, 1fr); }

/* 本页目录 */
.page-toc {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 8px;
  background: var(--bg-2); border: 1px solid var(--line); border-left: 4px solid var(--brand);
  border-radius: var(--radius); padding: 14px 18px; margin-bottom: 26px;
}
.page-toc b { font-size: 15px; color: var(--brand-d); margin-right: 6px; }
.page-toc a {
  font-size: 14px; color: var(--ink-2); background: #fff; border: 1px solid var(--line);
  border-radius: 20px; padding: 5px 14px; white-space: nowrap;
}
.page-toc a:hover { color: var(--brand); border-color: var(--brand); }

/* 正文 */
.ind-article { max-width: 100%; }
.ind-article .lead {
  text-indent: 0; font-size: 17px; line-height: 1.85; color: var(--ink);
  background: var(--brand-l); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 22px;
}
.ind-article h2[id] { scroll-margin-top: 90px; }
.ind-article .tip-box {
  text-indent: 0; background: #fff8ef; border: 1px solid #f3dcb8; border-left: 4px solid var(--accent);
  border-radius: var(--radius); padding: 14px 18px; font-size: 15px; color: #7a4a12; margin: 16px 0;
}
.ind-article .faq-dl { margin: 12px 0 20px; }
.ind-article .faq-dl dt {
  font-weight: 700; font-size: 16px; color: var(--brand-d);
  border-left: 3px solid var(--brand); padding-left: 12px; margin-top: 16px;
}
.ind-article .faq-dl dd { margin: 6px 0 0 15px; color: var(--ink-2); font-size: 15px; line-height: 1.8; }
.ind-article table.spec-table { width: 100%; border-collapse: collapse; }
.ind-article table.spec-table th { background: var(--bg-2); font-weight: 700; width: 22%; }
.ind-article table.spec-table thead th { background: var(--brand); color: #fff; }

/* 小结 */
.sol-summary {
  background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; margin: 28px 0;
}
.sol-summary h2 { font-size: 20px; color: var(--brand-d); margin-bottom: 10px; }
.sol-summary p { font-size: 15px; line-height: 1.9; color: var(--ink-2); }

/* 三步骤 */
.sol-flow { padding: 34px 0 6px; }
.sol-flow > h2 { font-size: 22px; text-align: center; margin-bottom: 22px; }
.sf-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.sf-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; position: relative; box-shadow: 0 1px 2px rgba(16, 40, 80, .04);
}
.sf-item .sf-no {
  display: inline-block; font-size: 26px; font-weight: 700; color: var(--brand-l);
  letter-spacing: 1px; margin-bottom: 6px;
}
.sf-item h3 { font-size: 17px; margin-bottom: 8px; color: var(--brand-d); }
.sf-item p { font-size: 14px; color: var(--ink-2); line-height: 1.8; }

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
  .nav > ul > li > a { padding: 0 9px; font-size: 15px; }
  .hd-quote { display: none; }
  .hd-tel .tel-num { font-size: 19px; }
  .cate-grid, .pro-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .ind-grid-all, .ind-grid-mini { grid-template-columns: repeat(3, 1fr); }
  .sf-grid { grid-template-columns: 1fr; }
  .detail-top { grid-template-columns: 380px 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .topbar { display: none; }
  .nav, .hd-tel, .hd-search { display: none; }
  .hd-toggle { display: block; margin-left: auto; }
  .hd-wrap { min-height: 60px; }
  .hero-slides { height: 380px; }
  .hero-txt h1 { font-size: 27px; }
  .hero-txt .ht-sub { font-size: 15px; }
  .hero-bar ul { grid-template-columns: repeat(2, 1fr); }
  .hero-bar li:nth-child(2n) { border-right: 0; }
  .hero-bar li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .sec { padding: 38px 0; }
  .sec-head h2 { font-size: 24px; }
  .cate-grid, .pro-grid, .case-grid, .ind-grid, .ind-grid-all, .ind-grid-mini { grid-template-columns: repeat(2, 1fr); }
  .page-toc { gap: 8px 6px; padding: 12px 14px; }
  .page-toc a { font-size: 13px; padding: 4px 11px; }
  .news-list { grid-template-columns: 1fr; }
  .layout { grid-template-columns: 1fr; }
  .side { display: none; }
  .about-box, .contact-grid, .detail-top { grid-template-columns: 1fr; }
  .map-grid { grid-template-columns: repeat(2, 1fr); }
  .page-banner h1 { font-size: 24px; }
  .art-head h1 { font-size: 22px; }
  .fixed-bar { bottom: 70px; right: 8px; }
  .fixed-bar .fb-item { width: 46px; height: 46px; }
  .mbar { display: block; }
  body { padding-bottom: 56px; }
  .ask-form .af-row { grid-template-columns: 1fr; }
  .about-txt .at-list { grid-template-columns: 1fr; }
  .cta-band .cb-wrap { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .hero-slides { height: 330px; }
  .hero-txt h1 { font-size: 23px; }
  .hero-txt .ht-btns .btn { flex: 1; min-width: 130px; }
  .cate-grid, .pro-grid, .case-grid, .ind-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .pro-card h3 { font-size: 14px; height: 42px; }
  .adv-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .footer-main { grid-template-columns: 1fr; padding: 30px 0 20px; }
  .map-grid { grid-template-columns: 1fr; }
  .tab-nav button { padding: 10px 14px; font-size: 15px; }
  .spec-table th { width: 92px; }
  .detail-info h1 { font-size: 21px; }
  .contact-info { padding: 18px; }
}

/* 打印 */
@media print {
  .site-header, .site-footer, .fixed-bar, .mbar, .hero, .cta-band { display: none !important; }
}