/* ============================================================
   速捷工控官网 - 本地化样式表
   说明：全部使用系统字体栈，无任何外部字体/CDN 调用。
   配色：工业藏蓝 + 警示橙红（强调“当天搞定/稳又快”）。
   ============================================================ */

:root {
  --navy: #0e2a47;
  --navy-2: #14375c;
  --steel: #2b5d8a;
  --accent: #ff5a1f;       /* 工业橙红 - 主 CTA */
  --accent-2: #ffb000;     /* 琥珀 - 高亮 */
  --ok: #1f9d55;           /* 安全绿 - 信任 */
  --bg: #f4f7fa;
  --bg-2: #eaf0f6;
  --ink: #1f2a33;
  --muted: #5b6b78;
  --line: #e2e8ee;
  --white: #ffffff;
  --shadow: 0 6px 22px rgba(14, 42, 71, 0.10);
  --shadow-sm: 0 2px 10px rgba(14, 42, 71, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
          "PingFang SC", "Hiragino Sans GB", "Source Han Sans CN",
          "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--steel); text-decoration: none; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 { color: var(--navy); line-height: 1.3; font-weight: 700; }
h1 { font-size: clamp(26px, 4vw, 40px); margin: 0 0 16px; }
h2 { font-size: clamp(22px, 3vw, 30px); margin: 0 0 14px; }
h3 { font-size: clamp(18px, 2.2vw, 22px); margin: 0 0 10px; }

p { margin: 0 0 14px; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- 顶部条形（统一事实） ---------- */
.topbar {
  background: var(--navy);
  color: #cfe0ef;
  font-size: 13px;
}
.topbar .container {
  display: flex; flex-wrap: wrap; gap: 6px 22px;
  align-items: center; justify-content: space-between; padding: 7px 20px;
}
.topbar a { color: #cfe0ef; }
.topbar a:hover { color: var(--accent-2); }
.topbar .tb-left { display: flex; gap: 18px; flex-wrap: wrap; }
.topbar .tb-left span::before { content: "›"; color: var(--accent-2); margin-right: 6px; }

/* ---------- 页头 / 导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  border-bottom: 3px solid var(--accent);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 20px; max-width: var(--maxw); margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 42px; width: auto; flex-shrink: 0; }

.nav {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 4px; max-width: var(--maxw); margin: 0 auto;
  padding: 4px 20px 12px; border-top: 1px solid var(--line);
}
.nav a {
  padding: 8px 12px; border-radius: 8px; color: var(--ink);
  font-size: 15px; font-weight: 600; white-space: nowrap;
}
.nav a:hover, .nav a.active { background: var(--bg-2); color: var(--accent); }

.header-cta { display: flex; align-items: center; gap: 10px; }
.btn-call {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #fff; font-weight: 800;
  padding: 10px 16px; border-radius: 999px; font-size: 15px;
  box-shadow: var(--shadow-sm);
}
.btn-call:hover { color: #fff; background: #e6490f; }
.btn-call .dot { width: 9px; height: 9px; border-radius: 50%; background: #fff;
  box-shadow: 0 0 0 0 rgba(255,255,255,.7); animation: pulse 1.8s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255,255,255,.7); }
  70% { box-shadow: 0 0 0 8px rgba(255,255,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}

.menu-toggle {
  display: none; background: var(--navy); color: #fff; border: 0;
  border-radius: 8px; width: 44px; height: 44px; font-size: 20px; cursor: pointer;
}

/* ---------- 英雄区 ---------- */
.hero {
  background:
    linear-gradient(120deg, rgba(14,42,71,.92), rgba(20,55,92,.78)),
    var(--bg-2);
  color: #fff; position: relative; overflow: hidden;
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 30px;
  align-items: center; padding: 46px 0 50px;
}
.hero h1 { color: #fff; }
.hero .lead { color: #d6e4f1; font-size: 17px; }
.hero .slogan {
  font-size: clamp(20px, 3vw, 26px); font-weight: 800; color: var(--accent-2);
  margin: 8px 0 6px;
}
.hero .cond {
  font-size: 14px; color: #b9cfe2; background: rgba(0,0,0,.18);
  border-left: 3px solid var(--accent-2); padding: 10px 14px; border-radius: 6px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px; font-weight: 700; cursor: pointer;
  border: 2px solid transparent; font-size: 15px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #e6490f; color: #fff; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn-ghost:hover { border-color: #fff; color: #fff; }
.hero-figure { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.hero-figure img { width: 100%; height: 100%; object-fit: cover; }

.trust-badges {
  display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 22px;
  font-size: 14px; color: #d6e4f1;
}
.trust-badges span { display: inline-flex; align-items: center; gap: 7px; }
.trust-badges .ic { color: var(--accent-2); font-weight: 800; }

/* ---------- 通用区块 ---------- */
.section { padding: 54px 0; }
.section.alt { background: var(--white); }
.section.soft { background: var(--bg-2); }
.section-head { text-align: center; max-width: 820px; margin: 0 auto 34px; }
.section-head .eyebrow {
  color: var(--accent); font-weight: 800; letter-spacing: 2px;
  font-size: 13px; text-transform: uppercase;
}
.section-head p { color: var(--muted); }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 20px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card .ic {
  width: 46px; height: 46px; border-radius: 10px; background: var(--bg-2);
  color: var(--steel); display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 12px; font-weight: 800;
}
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; margin: 0; }
.card .more { display: inline-block; margin-top: 12px; font-weight: 700; color: var(--accent); }

/* ---------- 痛点/步骤 ---------- */
.pain-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.pain {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; text-align: center; box-shadow: var(--shadow-sm);
}
.pain .emo { font-size: 26px; }
.pain h4 { margin: 8px 0 4px; font-size: 16px; }
.pain p { font-size: 13px; color: var(--muted); margin: 0; }

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; }
.step {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 14px; position: relative; box-shadow: var(--shadow-sm);
}
.step::before {
  counter-increment: step; content: counter(step);
  width: 30px; height: 30px; border-radius: 50%; background: var(--navy);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; margin-bottom: 10px;
}
.step h4 { font-size: 15px; margin: 0 0 4px; }
.step p { font-size: 13px; color: var(--muted); margin: 0; }

/* ---------- 服务方式 ---------- */
.modes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.mode {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm); border-top: 4px solid var(--steel);
}
.mode.remote { border-top-color: var(--ok); }
.mode.mail { border-top-color: var(--accent-2); }
.mode.onsite { border-top-color: var(--accent); }
.mode h3 { display: flex; align-items: center; gap: 10px; }
.mode .tag { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: var(--bg-2); color: var(--steel); font-weight: 700; }
.mode ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.mode ul li { margin-bottom: 6px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
table { border-collapse: collapse; width: 100%; background: var(--white); min-width: 640px; }
th, td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); font-size: 15px; vertical-align: top; }
thead th { background: var(--navy); color: #fff; position: sticky; top: 0; }
tbody tr:nth-child(even) { background: var(--bg-2); }
tbody tr:hover { background: #fff6f1; }
td .badge { display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 999px; background: var(--bg-2); color: var(--steel); font-weight: 700; }

/* ---------- 引述/承诺 ---------- */
.promise {
  background: var(--navy); color: #fff; border-radius: var(--radius);
  padding: 26px 28px; box-shadow: var(--shadow);
}
.promise h3 { color: var(--accent-2); }
.promise ul { margin: 10px 0 0; padding-left: 20px; }
.promise ul li { margin-bottom: 8px; }

.note {
  background: #fff8ef; border: 1px solid #ffd9b3; border-left: 4px solid var(--accent-2);
  border-radius: var(--radius-sm); padding: 14px 16px; color: #7a4b15; font-size: 14px;
}

.legal {
  background: #eef7f1; border: 1px solid #bfe3cc; border-left: 4px solid var(--ok);
  border-radius: var(--radius-sm); padding: 14px 16px; color: #1d5b34; font-size: 14px;
}

/* ---------- 资质 ---------- */
.qual { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.qual .q {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 16px; text-align: center; box-shadow: var(--shadow-sm);
}
.qual .q .medal { font-size: 30px; }
.qual .q p { font-size: 14px; color: var(--ink); margin: 6px 0 0; font-weight: 600; }

/* ---------- 案例 ---------- */
.case {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
}
.case .case-img { aspect-ratio: 16/9; overflow: hidden; background: var(--bg-2); }
.case .case-img img { width: 100%; height: 100%; object-fit: cover; }
.case .case-body { padding: 18px; }
.case .case-tag { font-size: 12px; color: var(--accent); font-weight: 700; }
.case h3 { font-size: 17px; margin: 6px 0 8px; }
.case p { font-size: 14px; color: var(--muted); margin: 0 0 10px; }
.case .result { font-size: 13px; color: var(--ok); font-weight: 700; }
/* 案例卡片改为可点击内链 */
a.case { color: inherit; text-decoration: none; transition: transform .15s, box-shadow .15s; }
a.case:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
a.case .case-more { display: inline-block; margin-top: 6px; color: var(--accent); font-weight: 700; font-size: 13px; }

/* ---------- 问答列表项（链接到详情内页） ---------- */
.qa-item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; margin-bottom: 12px; }
.qa-q { display: block; font-size: 17px; font-weight: 700; color: var(--navy); text-decoration: none; margin-bottom: 6px; }
.qa-q:hover { color: var(--accent); }
.qa-excerpt { font-size: 14px; color: var(--muted); margin: 0 0 8px; line-height: 1.7; }
.qa-more { font-size: 13px; color: var(--accent); font-weight: 700; text-decoration: none; }

/* ---------- 详情文章页 ---------- */
.article { max-width: 820px; }
.article .eyebrow { margin-bottom: 8px; }
.article h1 { font-size: 28px; margin: 0 0 12px; line-height: 1.3; }
.result-badge { display: inline-block; background: rgba(22,163,74,.1); color: var(--ok); font-weight: 800; padding: 6px 12px; border-radius: 999px; margin-bottom: 18px; }
.article-body h2 { font-size: 19px; margin: 26px 0 10px; color: var(--navy); }
.article-body p { font-size: 15.5px; line-height: 1.85; color: #334155; }
.cta-box { margin-top: 28px; padding: 22px; background: var(--bg-2); border-radius: var(--radius); border: 1px solid var(--line); }
.cta-box h3 { margin: 0 0 8px; }
.cta-box p { margin: 0 0 14px; }

/* ---------- 新闻/资讯内页 ---------- */
.article { max-width: 820px; }
.article-head { margin-bottom: 18px; }
.article-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.article-meta .cat { color: var(--accent); font-weight: 800; letter-spacing: .3px; }
.article-meta .sep { color: var(--line); }
.article h1 { font-size: 30px; line-height: 1.32; margin: 0 0 14px; color: var(--navy); }
.article-lead { font-size: 17px; line-height: 1.7; color: #475569; margin: 0 0 16px; font-weight: 600; }
.byline { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 13px; color: var(--muted); padding: 12px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.byline span { white-space: nowrap; }
.article-cover { margin: 18px 0 22px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.article-cover img { width: 100%; height: auto; display: block; }
.article-intro { font-size: 16px; line-height: 1.9; color: #334155; margin-bottom: 6px; }
.article-body h2 { font-size: 20px; line-height: 1.4; margin: 28px 0 10px; color: var(--navy); padding-left: 12px; border-left: 4px solid var(--accent); }
.pullquote { margin: 22px 0; padding: 16px 20px; background: var(--bg-2); border-left: 4px solid var(--accent); border-radius: 0 8px 8px 0; font-size: 17px; line-height: 1.6; font-weight: 700; color: var(--navy); }
.faq-list, .faq-steps { margin: 8px 0 0; padding-left: 22px; }
.faq-list li, .faq-steps li { font-size: 15px; line-height: 1.9; color: #334155; margin-bottom: 4px; }
.related { margin-top: 36px; padding-top: 22px; border-top: 2px solid var(--line); }
.related-title { font-size: 18px; color: var(--navy); margin: 0 0 14px; }
.rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.rel-card { display: flex; flex-direction: column; gap: 6px; padding: 14px; background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; transition: all .15s; }
.rel-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.rel-tag { font-size: 12px; color: var(--accent); font-weight: 800; }
.rel-title { font-size: 14.5px; color: var(--ink); font-weight: 600; line-height: 1.45; }
/* 详情页上下篇导航 */
.pager-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.pager-nav .pg-btn { min-width: auto; }

/* ---------- 问题 FAQ ---------- */
.faq { max-width: 880px; margin: 0 auto; }
.faq details {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm);
  margin-bottom: 12px; box-shadow: var(--shadow-sm); overflow: hidden;
}
.faq summary {
  cursor: pointer; padding: 16px 18px; font-weight: 700; color: var(--navy);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::after { content: "+"; color: var(--accent); font-size: 22px; font-weight: 800; }
.faq details[open] summary::after { content: "−"; }
.faq .answer { padding: 0 18px 18px; color: var(--muted); font-size: 15px; }

/* ---------- 城市列表 ---------- */
.city-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.city-grid a {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 10px 12px; font-size: 14px; font-weight: 600; color: var(--ink); text-align: center;
}
.city-grid a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 表单 ---------- */
.form-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); max-width: 720px; margin: 0 auto;
}
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 700; margin-bottom: 6px; color: var(--navy); font-size: 14px; }
.field label .req { color: var(--accent); }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 15px; font-family: var(--font); color: var(--ink); background: var(--bg);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--steel); background: #fff;
}
.field textarea { min-height: 110px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-msg { font-size: 14px; padding: 10px 14px; border-radius: var(--radius-sm); margin-bottom: 14px; display: none; }
.form-msg.ok { display: block; background: #eef7f1; color: #1d5b34; border: 1px solid #bfe3cc; }
.form-msg.err { display: block; background: #fdecea; color: #9a2b1b; border: 1px solid #f3c2bb; }

/* ---------- 表单验证码 ---------- */
.captcha-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.captcha-img {
  display: inline-block; width: 120px; height: 44px; border: 1px solid var(--line);
  border-radius: 8px; overflow: hidden; background: #eef3f8; flex: none; cursor: pointer;
}
.captcha-input { flex: 1; min-width: 140px; }

/* ---------- 联系信息块 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 26px; align-items: stretch; }
.contact-info, .form-card { display: flex; flex-direction: column; height: 100%; }
.contact-info .qr { margin-top: auto; }
.contact-info { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm); }
.contact-info .row { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.contact-info .row:last-child { border-bottom: 0; }
.contact-info .row .k { width: 84px; color: var(--muted); font-weight: 700; flex-shrink: 0; }
.contact-info .row .v { color: var(--ink); font-weight: 600; }
.wechat-copy { cursor: pointer; border-bottom: 1px dashed var(--accent); }
.wechat-copy:hover { color: var(--accent); }
.qr { background: var(--bg-2); border: 1px dashed var(--line); border-radius: var(--radius-sm); padding: 14px; text-align: center; }
.qr img { width: 140px; height: 140px; margin: 0 auto; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy); color: #cfe0ef; padding: 44px 0 22px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 26px; }
.site-footer h4 { color: #fff; font-size: 16px; margin: 0 0 14px; }
.site-footer a { color: #cfe0ef; display: block; padding: 4px 0; font-size: 14px; }
.site-footer a:hover { color: var(--accent-2); }
.site-footer .f-about p { font-size: 14px; color: #a9c2d8; }
.site-footer .f-contact span { display: block; padding: 4px 0; font-size: 14px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); margin-top: 26px; padding-top: 16px;
  font-size: 13px; color: #9fb8cf; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ---------- 页脚：城市分站折叠栏 ---------- */
.city-panel {
  margin-top: 22px; border: 1px solid rgba(255,255,255,.14); border-radius: 10px;
  background: rgba(255,255,255,.04); overflow: hidden;
}
.city-summary {
  list-style: none; cursor: pointer; user-select: none;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 13px 16px; font-size: 14px; font-weight: 700; color: #e7eef7;
}
.city-summary::-webkit-details-marker { display: none; }
.city-summary:hover { background: rgba(255,255,255,.07); }
.city-summary .arrow {
  font-size: 16px; line-height: 1; color: var(--accent);
  transition: transform .2s ease; flex: none;
}
.city-panel[open] > .city-summary .arrow { transform: rotate(180deg); }
.city-body {
  padding: 14px 16px 18px; border-top: 1px solid rgba(255,255,255,.1);
}
.city-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.city-chip {
  display: inline-block; padding: 6px 11px; border-radius: 999px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14);
  color: #d7e2ef; font-size: 12.5px; text-decoration: none; transition: all .15s;
}
.city-chip:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- 移动端底部固定栏 ---------- */
.mobile-bar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 60;
  background: var(--white); border-top: 1px solid var(--line);
  box-shadow: 0 -4px 18px rgba(14,42,71,.12);
}
.mobile-bar a, .mobile-bar button {
  flex: 1; text-align: center; padding: 9px 4px 11px; font-size: 12px; font-weight: 700;
  color: var(--navy); background: none; border: 0; cursor: pointer; display: flex;
  flex-direction: column; align-items: center; gap: 3px; text-decoration: none;
}
.mobile-bar .ic { font-size: 20px; }
.mobile-bar .call { color: var(--accent); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 18px; bottom: 76px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--navy); color: #fff; border: 0; cursor: pointer; font-size: 20px;
  box-shadow: var(--shadow); display: none; z-index: 55;
}
.to-top.show { display: block; }

/* ---------- 面包屑 ---------- */
.breadcrumb { font-size: 13px; color: var(--muted); padding: 14px 0 0; }
.breadcrumb a { color: var(--steel); }
.breadcrumb span { margin: 0 6px; }

/* ---------- 翻页 ---------- */
.pagination {
  display: flex; justify-content: center; align-items: center; gap: 8px;
  margin: 28px 0 6px; flex-wrap: wrap;
}
.pg-btn {
  min-width: 40px; padding: 8px 12px; border: 1px solid var(--line);
  background: var(--white); color: var(--ink); border-radius: 8px;
  font-size: 14px; font-weight: 700; cursor: pointer; transition: all .15s;
  display: inline-flex; align-items: center; justify-content: center;
}
.pg-btn:hover:not(.disabled) { border-color: var(--accent); color: var(--accent); }
.pg-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.pg-btn.disabled { opacity: .45; cursor: not-allowed; }
.pg-info {
  font-size: 14px; font-weight: 700; color: var(--navy);
  padding: 0 8px; align-self: center; white-space: nowrap;
}
.pg-sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .pain-list { grid-template-columns: repeat(3, 1fr); }
  .qual { grid-template-columns: repeat(3, 1fr); }
  .city-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav {
    position: fixed; top: 0; right: 0; height: 100vh; width: 78%; max-width: 320px;
    background: var(--white); flex-direction: column; align-items: stretch; gap: 0;
    padding: 70px 14px 30px; transform: translateX(100%); transition: transform .25s;
    box-shadow: -8px 0 30px rgba(0,0,0,.18); z-index: 70; overflow-y: auto;
  }
  .nav.open { transform: translateX(0); }
  .nav { border-top: 0; }
  .nav a { padding: 14px 12px; border-bottom: 1px solid var(--line); }
  .menu-toggle { display: block; }
  .brand-logo { height: 38px; }
  .header-cta .btn-call .label { display: none; }
  .header-cta .btn-call { padding: 10px; }
  .grid.cols-3, .grid.cols-4, .grid.cols-2 { grid-template-columns: 1fr; }
  .modes { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .pain-list { grid-template-columns: repeat(2, 1fr); }
  .qual { grid-template-columns: repeat(2, 1fr); }
  .city-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .mobile-bar { display: flex; }
  body { padding-bottom: 64px; }
  .to-top { bottom: 78px; }
  .section { padding: 40px 0; }
  .rel-grid { grid-template-columns: 1fr; }
  .article h1 { font-size: 24px; }
  .article-lead { font-size: 15.5px; }
  .byline { gap: 4px 12px; }
}