/* =========================================================
   pxb2026 主题样式 —— 现代简洁商务风
   依赖: bootstrap 5.3 (同目录 bootstrap.min.css)
   ========================================================= */

:root {
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-deep: #123a8f;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg-soft: #f6f8fb;
  --bg-blue: #eff6ff;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(15, 23, 42, .07);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, .12);
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.75;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 { color: var(--ink); font-weight: 700; line-height: 1.35; }
a { color: var(--brand); text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; }
.container { max-width: 1200px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 1030;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s, border-color .25s;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 18px rgba(15, 23, 42, .06); }
.site-header .navbar { padding: 0; min-height: 68px; }
.navbar-brand img { height: 54px; }
.container-wide { max-width: 1400px; }
.site-header .nav-link {
  color: var(--ink); font-weight: 500; font-size: 15px;
  padding: 24px 14px !important; display: block; white-space: nowrap;
}
.site-header .nav-link:hover, .site-header .nav-link.active { color: var(--brand); }
/* ---------- 顶部横向下拉大面板 ---------- */
.site-header .dropdown-toggle::after { transition: transform .2s; }
@media (min-width: 992px) {
  .site-header .navbar, .site-header .navbar-nav, .site-header .nav-item.has-mega { position: static; }
  .site-header .nav-item.has-mega > .mega-panel {
    position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; border-top: 1px solid var(--line);
    box-shadow: 0 24px 38px rgba(15, 23, 42, .10);
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: opacity .22s, transform .22s, visibility .22s;
  }
  .site-header .nav-item.has-mega:hover > .mega-panel,
  .site-header .nav-item.has-mega:focus-within > .mega-panel { opacity: 1; visibility: visible; transform: none; }
  .site-header .nav-item.has-mega:hover .dropdown-toggle::after { transform: rotate(180deg); }
}
.mega-inner { max-width: 1140px; margin: 0 auto; display: flex; align-items: flex-start; gap: 26px; padding: 20px 12px 24px; }
.mega-title {
  flex: 0 0 128px; position: relative; padding: 4px 0 4px 12px;
  font-size: 15px; font-weight: 700; color: var(--ink);
  border-right: 1px solid var(--line);
}
.mega-title::before { content: ""; position: absolute; left: 0; top: 7px; bottom: 7px; width: 3px; border-radius: 2px; background: var(--brand); }
.mega-items { flex: 1; display: flex; flex-wrap: wrap; gap: 6px 4px; }
.mega-item {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 12px; border-radius: 10px;
  color: var(--ink-2); font-size: 14px; transition: background .18s, color .18s;
}
.mega-item:hover { background: var(--bg-blue); color: var(--brand); }
.mega-badge {
  width: 30px; height: 30px; border-radius: 50%; flex: 0 0 30px;
  background: var(--bg-blue); color: var(--brand);
  font-size: 13px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
}
@media (max-width: 991.98px) {
  .site-header .nav-link { padding: 10px 4px !important; }
  .site-header .navbar-collapse { padding-bottom: 14px; }
  .mega-panel { border: 0; }
  .mega-inner { flex-direction: column; gap: 2px; padding: 0 0 6px; }
  .mega-title { display: none; }
  .mega-items { flex-direction: column; gap: 0; }
  .mega-item { padding: 8px 0 8px 30px; color: var(--muted); }
  .mega-badge { display: none; }
}
.header-cta { white-space: nowrap; }

/* ---------- 按钮 ---------- */
.btn-brand {
  display: inline-block; background: var(--brand); color: #fff;
  padding: 10px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 0; transition: all .2s; box-shadow: 0 6px 16px rgba(37, 99, 235, .28);
}
.btn-brand:hover { background: var(--brand-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 10px 22px rgba(37, 99, 235, .34); }
.btn-outline-brand {
  display: inline-block; color: var(--brand); border: 1px solid var(--brand);
  padding: 10px 26px; border-radius: 999px; font-weight: 600; font-size: 15px; transition: all .2s;
}
.btn-outline-brand:hover { background: var(--brand); color: #fff; }
.btn-light-brand { display: inline-block; background: #fff; color: var(--brand); padding: 10px 26px; border-radius: 999px; font-weight: 600; transition: all .2s; }
.btn-light-brand:hover { background: var(--bg-blue); color: var(--brand-deep); }
.btn-tel { display: inline-flex; align-items: center; gap: 8px; color: var(--brand); font-weight: 700; }
.btn-tel svg { flex: none; }

/* ---------- 首页 Hero ---------- */
.hero {
  background: linear-gradient(180deg, #eff6ff 0%, #f8fafc 78%, #fff 100%);
  overflow: hidden;
}
.hero .container { position: relative; }
.hero-txt { padding: 84px 0 72px; }
.hero-txt h1 { font-size: clamp(28px, 4vw, 44px); letter-spacing: .5px; margin-bottom: 18px; }
.hero-txt .hero-sub { font-size: 17px; color: var(--muted); margin-bottom: 10px; }
.hero-txt .hero-tag { color: var(--ink-2); margin-bottom: 30px; }
.hero-txt .hero-tag span { display: inline-block; background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 4px 14px; margin: 0 8px 10px 0; font-size: 13px; color: var(--ink-2); }
.hero-img { padding: 60px 0 40px; }
.hero-img img { filter: drop-shadow(0 24px 48px rgba(37, 99, 235, .18)); border-radius: 10px; }

/* ---------- 通用区块 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-soft); }
.sec-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.sec-head .eyebrow { display: inline-block; color: var(--brand); background: var(--bg-blue); border-radius: 999px; font-size: 13px; font-weight: 600; padding: 3px 16px; margin-bottom: 14px; letter-spacing: 2px; }
.sec-head h2 { font-size: clamp(22px, 3vw, 30px); margin-bottom: 10px; }
.sec-head p { color: var(--muted); margin: 0; }

/* ---------- 功能/优势卡片 ---------- */
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; height: 100%; transition: all .25s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-card .f-icon { width: 52px; height: 52px; object-fit: contain; margin-bottom: 18px; }
.feature-card h3 { font-size: 17px; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 14px; margin: 0; }
@media (max-width: 575px) {
  .feature-card { padding: 16px 10px 14px; text-align: center; }
  .feature-card .f-icon { width: 40px; height: 40px; margin-bottom: 10px; }
  .feature-card h3 { font-size: 14px; margin-bottom: 6px; }
  .feature-card p { font-size: 12px; line-height: 1.6; text-align: left; }
}

/* ---------- 行业方案卡片 ---------- */
.ind-card {
  display: block; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: all .25s; height: 100%;
}
.ind-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; color: inherit; }
.ind-card .pic { aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-soft); }
.ind-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.ind-card:hover .pic img { transform: scale(1.05); }
.ind-card .txt { padding: 18px 20px 20px; }
.ind-card h3 { font-size: 16px; margin-bottom: 6px; }
.ind-card p { color: var(--muted); font-size: 13px; margin: 0; }

/* ---------- 全行业解决方案图标卡 ---------- */
.sol-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.sol-card {
  flex: 0 0 calc((100% - 48px) / 4); min-width: 0; background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 12px 14px; text-align: center; display: block;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.sol-card:hover { transform: translateY(-4px); border-color: var(--brand); box-shadow: var(--shadow-lg); color: inherit; }
/* width 用 100% + max-width 限宽:写死 200px 会触发 flex 子项 min-width:auto 不收缩,手机 3 列被撑成 1 列 */
.sol-pic { display: block; width: 100%; max-width: 200px; aspect-ratio: 1 / 1; margin: 0 auto 10px; border-radius: 14px; overflow: hidden; background: var(--bg-soft); }
.sol-pic img { width: 100%; height: 100%; object-fit: cover; }
.sol-card h3 { font-size: 15px; font-weight: 600; color: var(--ink); line-height: 1.45; margin: 0; }
@media (max-width: 991px) { .sol-card { flex-basis: calc((100% - 32px) / 3); } }
@media (max-width: 575px) {
  .sol-card { flex-basis: calc((100% - 32px) / 3); padding: 10px 6px; }
  .sol-pic { border-radius: 10px; margin-bottom: 8px; }
  .sol-card h3 { font-size: 12px; }
}

/* ---------- 八大场景功能 ---------- */
.scene-tabs { gap: 10px; margin-bottom: 26px; flex-wrap: nowrap; }
.scene-tabs li { display: flex; }
.scene-tabs .nav-link {
  width: 104px; padding: 16px 6px 12px; border: 1px solid var(--line); border-radius: 12px;
  background: #fff; color: var(--ink-2); display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; line-height: 1; transition: all .2s; cursor: pointer;
}
.scene-tabs .nav-link svg { width: 26px; height: 26px; fill: none; stroke: var(--muted); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; transition: stroke .2s; }
.scene-tabs .nav-link:hover { color: var(--brand); border-color: var(--brand); }
.scene-tabs .nav-link:hover svg { stroke: var(--brand); }
.scene-tabs .nav-link.active { background: var(--brand); border-color: var(--brand); color: #fff; box-shadow: 0 8px 18px rgba(37,99,235,.28); }
.scene-tabs .nav-link.active svg { stroke: #fff; }
.scene-pane { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 34px 38px; }
.scene-pane h3 { font-size: 20px; margin-bottom: 8px; }
.scene-pane .scene-sub { color: var(--brand); font-size: 14px; margin-bottom: 18px; }
.scene-feats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; margin: 0; padding: 0; }
.scene-feats li { color: var(--muted); font-size: 14px; list-style: none; position: relative; padding-left: 22px; }
.scene-feats li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 700; }
@media (max-width: 991px) {
  .scene-tabs { flex-wrap: wrap; }
  .scene-tabs li { width: calc(25% - 8px); }
  .scene-tabs .nav-link { width: 100%; }
}
@media (max-width: 575px) {
  .scene-tabs { gap: 8px; }
  .scene-tabs li { width: calc(25% - 6px); }
  .scene-tabs .nav-link { padding: 10px 2px 8px; font-size: 12px; gap: 6px; border-radius: 10px; }
  .scene-tabs .nav-link svg { width: 22px; height: 22px; }
  .scene-pane { padding: 24px 18px; }
  .scene-feats { grid-template-columns: 1fr; }
}

/* ---------- 教程/文章卡片 ---------- */
.post-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: all .25s; height: 100%; display: block; color: inherit;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; color: inherit; }
.post-card .pic { aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.post-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.post-card:hover .pic img { transform: scale(1.04); }
.post-card .txt { padding: 16px 20px 20px; }
.post-card .date { color: var(--muted); font-size: 12.5px; }
.post-card h3 { font-size: 15.5px; margin: 6px 0 0; line-height: 1.55; }

/* ---------- 优势区(图文) ---------- */
.about-sec img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-sec ul { list-style: none; padding: 0; margin: 20px 0 0; }
.about-sec ul li { padding: 7px 0 7px 30px; position: relative; color: var(--ink-2); }
.about-sec ul li::before {
  content: ""; position: absolute; left: 0; top: 12px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--bg-blue) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232563eb'%3E%3Cpath d='M12.736 3.97a.733.733 0 0 1 1.047 0c.286.289.29.756.01 1.05L7.88 12.01a.733.733 0 0 1-1.065.02L3.217 8.384a.757.757 0 0 1 0-1.06.733.733 0 0 1 1.047 0l3.052 3.093 5.4-6.425z'/%3E%3C/svg%3E") center/12px no-repeat;
}

/* ---------- CTA 咨询条 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--brand-deep), var(--brand));
  border-radius: 20px; color: #fff; padding: 44px 48px;
}
.cta-band h2 { color: #fff; font-size: clamp(19px, 2.6vw, 26px); margin: 0 0 6px; }
.cta-band p { margin: 0; opacity: .85; }
.cta-band .btn-light-brand { box-shadow: 0 8px 20px rgba(0, 0, 0, .18); }

/* ---------- 内页横幅 + 面包屑 ---------- */
.page-banner {
  background: linear-gradient(rgba(18, 58, 143, .82), rgba(18, 58, 143, .82)), url("/static/images/breadcrumb-bg.jpg") center/cover no-repeat;
  color: #fff; padding: 52px 0 46px;
}
.page-banner .page-title { font-size: clamp(22px, 3vw, 30px); font-weight: 700; color: #fff; margin: 0 0 6px; }
.page-banner .crumbs, .page-banner .crumbs a { color: rgba(255, 255, 255, .82); font-size: 13.5px; }
.page-banner .crumbs a:hover { color: #fff; }

/* ---------- 内页布局 ---------- */
.inner-main { padding: 48px 0 72px; }
.sidebar .widget { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 22px; }
.sidebar .widget h3 { font-size: 16px; padding-bottom: 12px; margin-bottom: 14px; border-bottom: 2px solid var(--bg-blue); }
.sidebar .cat-list { list-style: none; margin: 0; padding: 0; }
.sidebar .cat-list li a {
  display: block; padding: 9px 12px; border-radius: 8px; color: var(--ink-2); font-size: 14px; margin-bottom: 2px;
}
.sidebar .cat-list li a:hover, .sidebar .cat-list li a.active { background: var(--bg-blue); color: var(--brand); font-weight: 600; }
.search-form { display: flex; gap: 8px; }
.search-form input { flex: 1; min-width: 0; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; font-size: 14px; outline: none; }
.search-form input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37, 99, 235, .12); }
.search-form button { border: 0; background: var(--brand); color: #fff; border-radius: 8px; padding: 8px 16px; font-size: 14px; }

/* ---------- 文章/详情正文 ---------- */
.article-head { margin-bottom: 26px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.article-head h1 { font-size: clamp(20px, 2.6vw, 26px); margin-bottom: 12px; }
.article-head .meta { color: var(--muted); font-size: 13px; }
.article-body { font-size: 15.5px; color: var(--ink-2); overflow-wrap: break-word; }
/* 老编辑器正文常带内联 width/max-width 样式,须 !important 才能在手机端压住 */
.article-body img { max-width: 100% !important; width: auto !important; height: auto !important; border-radius: 8px; }
.article-body table { max-width: 100%; display: block; overflow-x: auto; }
.article-body h2, .article-body h3 { margin: 26px 0 12px; }
.article-body p { margin-bottom: 14px; }

/* ---------- FAQ 手风琴 ---------- */
.faq-acc .accordion-item { border: 1px solid var(--line); border-radius: 12px !important; margin-bottom: 12px; overflow: hidden; }
.faq-acc .accordion-button { font-weight: 600; color: var(--ink); font-size: 15px; padding: 16px 20px; }
.faq-acc .accordion-button:not(.collapsed) { background: var(--bg-blue); color: var(--brand); box-shadow: none; }
.faq-acc .accordion-button:focus { box-shadow: none; }
.faq-acc .accordion-body { color: var(--muted); font-size: 14px; padding-top: 4px; }

/* ---------- 联系页 ---------- */
.contact-wrap { padding: 56px 0 64px; }
.contact-lead h2 { font-size: clamp(20px, 2.6vw, 26px); margin: 6px 0 10px; }
.contact-lead p { color: var(--muted); margin: 0; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.contact-card {
  display: block; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 22px 20px; transition: all .22s;
}
.contact-card:hover { border-color: var(--brand); box-shadow: var(--shadow-lg); transform: translateY(-3px); text-decoration: none; }
.contact-card .c-ico {
  width: 44px; height: 44px; border-radius: 12px; background: var(--bg-blue); color: var(--brand);
  display: inline-flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.contact-card h3 { font-size: 13px; color: var(--muted); font-weight: 600; letter-spacing: 1px; margin: 0 0 4px; }
.contact-card .c-val { display: block; font-size: 18px; font-weight: 700; color: var(--ink); }
.contact-card .c-sub { display: block; font-size: 12.5px; color: var(--muted); margin-top: 5px; }
.qr-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 30px 24px 26px; text-align: center; box-shadow: var(--shadow);
}
.qr-card img { width: 190px; height: 190px; border-radius: 12px; background: var(--bg-soft); }
.qr-card h3 { font-size: 17px; margin: 16px 0 4px; }
.qr-card p { color: var(--muted); font-size: 13px; margin: 0; }
.contact-addr {
  display: flex; gap: 14px; align-items: flex-start;
  background: linear-gradient(120deg, var(--bg-blue), #f8fafc);
  border: 1px solid #dbeafe; border-radius: var(--radius); padding: 20px 22px;
}
.contact-addr .a-ico { flex: none; width: 42px; height: 42px; border-radius: 12px; background: #fff; color: var(--brand); display: inline-flex; align-items: center; justify-content: center; box-shadow: var(--shadow); }
.contact-addr strong { color: var(--ink); font-size: 14.5px; }
.contact-addr p { color: var(--muted); font-size: 13.5px; margin: 4px 0 0; }
.contact-tips .tip-item { background: var(--bg-soft); border-radius: 12px; padding: 18px 20px; height: 100%; }
.contact-tips .tip-item strong { color: var(--ink); font-size: 14.5px; }
.contact-tips .tip-item p { color: var(--muted); font-size: 13px; margin: 6px 0 0; }
@media (max-width: 575px) {
  .contact-wrap { padding: 40px 0 48px; }
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .contact-card { padding: 16px 14px 14px; }
  .contact-card .c-ico { width: 38px; height: 38px; margin-bottom: 10px; }
  .contact-card .c-val { font-size: 15.5px; }
  .contact-card .c-sub { font-size: 12px; }
  .qr-card { padding: 22px 16px 20px; }
  .qr-card img { width: 170px; height: 170px; }
}

/* ---------- 城市分站目录 ---------- */
.city-dir dl { display: flex; flex-wrap: wrap; align-items: flex-start; padding: 14px 0; border-bottom: 1px dashed var(--line); margin: 0; }
.city-dir dt { flex: 0 0 96px; }
.city-dir dt a { display: inline-block; background: var(--brand); color: #fff; border-radius: 8px; padding: 3px 14px; font-size: 14px; font-weight: 600; }
.city-dir dt a:hover { background: var(--brand-dark); color: #fff; }
.city-dir dd { flex: 1; margin: 0 0 0 12px; display: flex; flex-wrap: wrap; }
.city-dir dd a { color: var(--ink-2); font-size: 14px; padding: 3px 12px; border-radius: 6px; }
.city-dir dd a:hover { background: var(--bg-blue); color: var(--brand); }

/* ---------- 搜索结果 ---------- */
.result-tip { color: var(--muted); }

/* ---------- 分页(兼容 CMS 输出结构) ---------- */
.page-nav { display: flex; justify-content: center; margin-top: 34px; }
.page-nav ul, ul.pagination { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.page-nav a, .page-nav span, ul.pagination a, ul.pagination span, ul.pagination .page-link {
  display: inline-block; min-width: 38px; text-align: center; padding: 7px 13px;
  border: 1px solid var(--line); border-radius: 8px; color: var(--ink-2); font-size: 14px; background: #fff;
}
.page-nav a:hover, ul.pagination a:hover { border-color: var(--brand); color: var(--brand); }
.page-nav .active a, .page-nav .active span, ul.pagination li.active a, ul.pagination li.active span, ul.pagination .active .page-link, ul.pagination li .page-link.active {
  background: var(--brand); border-color: var(--brand); color: #fff;
}

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: #94a3b8; margin-top: 0; }
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }
.footer-top { padding: 56px 0 40px; }
.site-footer h3 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: 1px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer ul li { margin-bottom: 9px; font-size: 13.5px; }
.footer-contact li { display: flex; gap: 8px; }
.footer-contact svg { flex: none; margin-top: 4px; }
.footer-qr { text-align: center; }
.footer-qr img { width: 110px; height: 110px; border-radius: 10px; background: #fff; padding: 4px; }
.footer-qr p { font-size: 12.5px; margin: 8px 0 0; }
.footer-city { font-size: 13px; line-height: 2; }
.footer-bottom { border-top: 1px solid rgba(148, 163, 184, .18); padding: 18px 0; font-size: 12.5px; }
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed; right: 22px; bottom: 30px; z-index: 1040;
  width: 44px; height: 44px; border-radius: 50%; border: 0;
  background: var(--brand); color: #fff; box-shadow: 0 8px 20px rgba(37, 99, 235, .35);
  opacity: 0; visibility: hidden; transform: translateY(8px); transition: all .25s; cursor: pointer;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--brand-dark); }


@media (max-width: 991.98px) {
  .section { padding: 52px 0; }
  .hero-txt { padding: 52px 0 30px; }
  .hero-img { padding: 10px 0 40px; }
  .cta-band { padding: 32px 26px; }
}