/* ============================================================
   武汉八零大叔电梯资讯 · 全局样式
   纯静态 · 现代CSS · 响应式 · 零依赖
   技术栈：CSS自定义属性 + Grid + Flex + clamp()
   ============================================================ */
:root {
  --c-bg: #f7f9fc;
  --c-surface: #ffffff;
  --c-ink: #16202e;
  --c-ink-soft: #44505f;
  --c-brand: #0b5fb0;      /* 武汉工业蓝 */
  --c-brand-dark: #084a8a;
  --c-accent: #ff7a18;     /* 咨询橙 */
  --c-line: #e2e8f0;
  --c-ok: #1f9d55;
  --radius: 14px;
  --shadow: 0 6px 22px rgba(15, 42, 74, .08);
  --maxw: 1120px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.75;
  font-size: clamp(15px, 1vw + 13px, 17px);
}
a { color: var(--c-brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { line-height: 1.3; color: var(--c-ink); font-weight: 800; }
h1 { font-size: clamp(26px, 3.4vw, 42px); margin: 0 0 .5em; }
h2 { font-size: clamp(21px, 2.4vw, 30px); margin: 1.8em 0 .7em; padding-bottom: .3em; border-bottom: 3px solid var(--c-brand); }
h3 { font-size: clamp(17px, 1.8vw, 21px); margin: 1.3em 0 .5em; }
p { margin: 0 0 1em; color: var(--c-ink-soft); }
ul, ol { padding-left: 1.3em; color: var(--c-ink-soft); }
li { margin: .35em 0; }

/* ---------- 布局容器 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 12px; top: 12px; background: #fff; padding: 8px 14px; z-index: 100; border-radius: 8px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; color: var(--c-ink); flex-shrink: 0; }
.brand img { width: 34px; height: 34px; }
.brand span { font-size: 16px; white-space: nowrap; }
.nav-links { display: flex; gap: 2px; list-style: none; margin: 0; padding: 0; flex-wrap: nowrap; }
.nav-links a {
  display: block; padding: 7px 10px; border-radius: 8px;
  color: var(--c-ink-soft); font-weight: 600; font-size: 14px;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { background: var(--c-bg); color: var(--c-brand); text-decoration: none; }
.nav-phone {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--c-accent); color: #fff !important;
  padding: 7px 12px; border-radius: 999px;
  font-weight: 700; font-size: 13px; white-space: nowrap;
  text-decoration: none;
}
.nav-phone:hover { background: #e96a08; }
.nav-phone::before { content: "📞"; }
.nav-toggle { display: none; background: none; border: 1px solid var(--c-line); border-radius: 8px; padding: 8px 10px; cursor: pointer; font-size: 18px; flex-shrink: 0; }

/* ---------- 次导航条（hero 之下） ---------- */
.subnav {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
  overflow-x: auto;
}
.subnav ul {
  display: flex; gap: 6px; padding: 10px 0; margin: 0; list-style: none;
  justify-content: center;
  -webkit-overflow-scrolling: touch;
}
.subnav a {
  display: inline-block; padding: 6px 14px;
  border-radius: 999px; background: var(--c-bg);
  color: var(--c-ink-soft); font-size: 13px; font-weight: 600;
  white-space: nowrap; text-decoration: none;
}
.subnav a:hover, .subnav a[aria-current="page"] { background: var(--c-brand); color: #fff; }

/* ---------- Sitemap 列表 ---------- */
.sitemap-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin: 24px 0;
}
.sitemap-cat {
  background: var(--c-bg); padding: 16px 18px; border-radius: var(--radius);
}
.sitemap-cat h3 { margin: 0 0 10px; font-size: 15px; color: var(--c-brand); }
.sitemap-cat ul { list-style: none; padding: 0; margin: 0; }
.sitemap-cat li { padding: 5px 0; border-bottom: 1px dashed var(--c-line); font-size: 14px; }
.sitemap-cat li:last-child { border-bottom: 0; }
.sitemap-cat a { color: var(--c-ink-soft); }
.sitemap-cat a:hover { color: var(--c-brand); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 460px;
  display: flex; align-items: center;
  background: linear-gradient(rgba(10,40,80,.55), rgba(10,40,80,.65)),
              url("../img/hero-real.jpg") center / cover no-repeat;
  color: #fff;
  padding: clamp(40px, 7vw, 80px) 0;
}
.hero > .container { position: relative; z-index: 1; width: 100%; }
.hero h1 { color: #fff; text-shadow: 0 2px 12px rgba(0,0,0,.35); }
.hero p { color: rgba(255,255,255,.92); font-size: 1.1em; max-width: 640px; text-shadow: 0 1px 6px rgba(0,0,0,.3); }
.hero .tags { margin-top: 18px; display: flex; gap: 8px; flex-wrap: wrap; }
.hero .tags span { background: rgba(255,255,255,.18); padding: 5px 12px; border-radius: 999px; font-size: 13px; backdrop-filter: blur(2px); }
/* 移动端缩图高度 */
@media (max-width: 720px) { .hero { min-height: 360px; } }

/* ---------- 首页「已服务 X 家」滚动条 ---------- */
.statbar { background: var(--c-accent); color: #fff; }
.statbar-inner {
  display: flex; align-items: baseline; justify-content: center; gap: 12px;
  padding: 14px 0; flex-wrap: wrap; text-align: center;
}
.stat-num {
  font-size: 2.1rem; font-weight: 900; line-height: 1;
  font-variant-numeric: tabular-nums; letter-spacing: .5px;
}
.stat-label { font-size: 1.05rem; font-weight: 600; opacity: .95; }
.stat-unit { font-size: 1.05rem; font-weight: 600; opacity: .95; }
@media (max-width: 520px) {
  .stat-num { font-size: 1.7rem; }
  .stat-label { font-size: .95rem; }
  .stat-unit { font-size: .95rem; }
}

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 18px; margin: 22px 0; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--c-surface); border: 1px solid var(--c-line);
  border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(15,42,74,.12); }
.card h3 { margin-top: 0; }
.card .price { color: var(--c-accent); font-weight: 800; font-size: 1.1em; }
.card a.more { font-weight: 700; }

/* ---------- 内容区 ---------- */
main { padding: 40px 0 60px; }
.lead { font-size: 1.08em; color: var(--c-ink); background: #eef5ff; border-left: 4px solid var(--c-brand); padding: 14px 18px; border-radius: 0 10px 10px 0; }
.callout { background: #fff5ee; border: 1px solid #ffd2ad; border-radius: var(--radius); padding: 16px 20px; margin: 22px 0; }
.callout b { color: var(--c-accent); }

/* ---------- 面包屑 ---------- */
.breadcrumb { font-size: 13px; color: var(--c-ink-soft); padding: 16px 0 0; }
.breadcrumb a { color: var(--c-ink-soft); }
.breadcrumb span { margin: 0 6px; color: var(--c-line); }

/* ---------- FAQ ---------- */
.faq { margin: 18px 0; }
.faq details { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: 10px; padding: 4px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 12px 0; color: var(--c-ink); }
.faq summary::-webkit-details-marker { color: var(--c-brand); }
.faq details p { margin: 0 0 14px; }

/* ---------- 价格表 ---------- */
.pricetable { width: 100%; border-collapse: collapse; margin: 18px 0; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.pricetable th, .pricetable td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--c-line); }
.pricetable th { background: var(--c-brand); color: #fff; font-size: 14px; }
.pricetable tr:last-child td { border-bottom: none; }
.pricetable td b { color: var(--c-accent); }

/* ---------- CTA 区块 ---------- */
.cta {
  background: var(--c-surface); border: 2px solid var(--c-accent);
  border-radius: var(--radius); padding: 28px; margin: 36px 0; text-align: center;
}
.cta h2 { border: none; margin-top: 0; color: var(--c-ink); }
.cta .qr { width: 180px; height: auto; margin: 14px auto; display: block; }
.cta-tip { margin-top: 10px; color: var(--c-brand); font-weight: 700; font-size: 15px; }
.btn {
  display: inline-block; background: var(--c-accent); color: #fff;
  padding: 13px 28px; border-radius: 999px; font-weight: 800; font-size: 16px;
  border: none; cursor: pointer;
}
.btn:hover { background: #e96a08; text-decoration: none; color: #fff; }

/* ---------- 咨询表单 ---------- */
.consult-form { max-width: 460px; margin: 16px auto 0; text-align: left; }
.consult-form label { display: block; font-weight: 700; margin: 12px 0 4px; font-size: 14px; }
.consult-form input, .consult-form textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--c-line);
  border-radius: 10px; font-family: inherit; font-size: 15px;
}
.consult-form .hint { font-size: 12px; color: var(--c-ink-soft); margin-top: 6px; }
.form-msg { color: var(--c-ok); font-weight: 700; min-height: 1.2em; margin-top: 10px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0e1a28; color: #fff; padding: 36px 0 24px; font-size: 14px; }
.site-footer .container > .cols > div > p { color: #fff; }                   /* 4列里的描述段落全白 */
.site-footer .cols li { color: #fff; }                                       /* 列表项文字白 */
.site-footer a { color: #9fc4ee; }                                           /* 链接浅蓝(可点辨识) */
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer a.phone { color: #fff; font-weight: 700; }
.site-footer a.phone b { color: #fff; }
.site-footer a.icp-link { color: #9fc4ee; text-decoration: underline; }
.site-footer .cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: 15px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 6px 0; }
.footer-bottom { border-top: 1px solid #213043; margin-top: 24px; padding-top: 16px; font-size: 13px; color: #d6dde7; text-align: center; }
.footer-bottom p { margin: 6px 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  /* 中等屏：收紧主导航间距 */
  .nav-links a { padding: 7px 8px; font-size: 13px; }
  .nav-phone { padding: 7px 10px; font-size: 12px; }
  .brand span { font-size: 15px; }
}
@media (max-width: 600px) {
  /* 窄屏：次导航改左对齐，避免居中裁切两端且无法滚动 */
  .subnav ul { justify-content: flex-start; }
}
@media (max-width: 860px) {
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .site-footer .cols { grid-template-columns: repeat(2, 1fr); }
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 10px 20px; border-bottom: 1px solid var(--c-line);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 8px; }
}
@media (max-width: 520px) {
  .site-footer .cols { grid-template-columns: 1fr; }
  .brand span { display: none; }   /* 极窄屏只留 logo 图 */
}

/* ---------- CTA：电话 + 二维码同置 ---------- */
.cta-actions { display: flex; align-items: center; justify-content: center; gap: 28px; flex-wrap: wrap; margin: 20px 0 6px; }
.cta-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--c-accent); color: #fff !important;
  font-weight: 800; font-size: 18px; padding: 14px 26px; border-radius: 999px; text-decoration: none;
}
.cta-cta:hover { background: #e96a08; text-decoration: none; }
.cta-qr { text-align: center; }
.cta-qr .qr { width: 150px; height: auto; margin: 0 auto; }
.cta-gift { margin-top: 14px; color: var(--c-ok); font-weight: 700; font-size: 15px; }

/* ---------- 信任块（占位待补） ---------- */
.trust { background: var(--c-bg); border: 1px solid var(--c-line); border-radius: var(--radius); padding: 26px; margin: 36px 0; }
.trust h2 { border: none; margin-top: 0; color: var(--c-ink); }
/* 整块就是一堵图片横向滑动墙，不分分类文字 */
.case-strip--full { display: flex; gap: 12px; overflow-x: auto; padding: 4px 2px 14px; margin: 14px 0 4px; -webkit-overflow-scrolling: touch; scrollbar-width: thin; }
.case-strip--full .case-thumb {
  flex: 0 0 auto; width: clamp(180px, 42vw, 240px); aspect-ratio: 4 / 3;
  border: 2px dashed var(--c-line); border-radius: 12px;
  display: flex; align-items: center; justify-content: center; text-align: center;
  color: var(--c-ink-soft); font-size: 13px; font-weight: 600; padding: 10px;
  background: repeating-linear-gradient(45deg, #fafcff, #fafcff 10px, #f1f5fb 10px, #f1f5fb 20px);
}
/* 图片替换占位后铺满：自动适配 */
.case-strip--full .case-thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 10px; display: block; }
.trust-note { font-size: 13px; color: var(--c-ink-soft); margin-top: 8px; text-align: center; }
.trust-note b { color: var(--c-accent); }

/* ---------- 移动端吸底联系条 ---------- */
.mobile-bar { display: none; }
@media (max-width: 700px) {
  body { padding-bottom: 62px; }
  .mobile-bar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    background: #fff; border-top: 1px solid var(--c-line); box-shadow: 0 -4px 16px rgba(0,0,0,.08);
  }
  .mobile-bar a { flex: 1; text-align: center; padding: 14px 8px; font-weight: 800; font-size: 15px; text-decoration: none; }
  .mobile-bar .mb-phone { background: var(--c-accent); color: #fff; }
  .mobile-bar .mb-wechat { background: var(--c-brand); color: #fff; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}