/* ============================================================
   山东奥润热能设备有限公司 · 全站样式
   设计语言：现代工业风 / 深蓝科技渐变 / 大留白 / 玻璃拟态
   ============================================================ */

:root {
  --primary: #0B5FFF;
  --primary-dark: #0846BD;
  --teal: #00C2A8;
  --amber: #FFB020;
  --ink: #0F1B2D;
  --ink-soft: #43506B;
  --muted: #7B879E;
  --line: #E5EAF3;
  --bg: #FFFFFF;
  --bg-soft: #F5F8FE;
  --radius: 14px;
  --shadow-sm: 0 1px 3px rgba(15, 27, 45, .06);
  --shadow-md: 0 8px 24px rgba(15, 27, 45, .09);
  --shadow-lg: 0 18px 50px rgba(11, 95, 255, .16);
  --grad-brand: linear-gradient(135deg, #0B5FFF 0%, #00C2A8 100%);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: min(1200px, 92%); margin: 0 auto; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 8px; top: 8px; z-index: 999; background: #fff; padding: 8px 16px; border-radius: 8px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: all .25s ease; border: none; cursor: pointer; white-space: nowrap;
}
.btn-primary { background: var(--grad-brand); color: #fff; box-shadow: 0 6px 18px rgba(11, 95, 255, .28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(11, 95, 255, .38); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.55); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline { background: #fff; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 16px 38px; font-size: 16px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: var(--shadow-md); }
.header-inner { display: flex; align-items: center; gap: 28px; height: 74px; }
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand img { width: 40px; height: 40px; }
.brand-text strong { display: block; font-size: 18px; letter-spacing: .5px; }
.brand-text small { display: block; font-size: 11px; color: var(--muted); letter-spacing: .3px; margin-top: 1px; }
.main-nav { display: flex; gap: 4px; margin-left: auto; }
.main-nav a {
  padding: 9px 15px; border-radius: 9px; font-size: 15px; font-weight: 500;
  color: var(--ink-soft); transition: all .2s; position: relative;
}
.main-nav a:hover { color: var(--primary); background: var(--bg-soft); }
.main-nav a.active { color: var(--primary); font-weight: 600; }
.main-nav a.active::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 3px;
  height: 2.5px; border-radius: 2px; background: var(--grad-brand);
}
.header-cta { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.phone-link { display: flex; align-items: center; gap: 6px; font-weight: 700; color: var(--ink); font-size: 15px; }
.phone-link svg { color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: all .3s; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(0,194,168,.22), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(11,95,255,.25), transparent 55%),
    linear-gradient(160deg, #0A1630 0%, #0D2247 48%, #0A2E52 100%);
  color: #fff;
}
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .5; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; padding: 88px 0 96px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px; border-radius: 999px; font-size: 13.5px; font-weight: 500;
  background: rgba(0,194,168,.14); border: 1px solid rgba(0,194,168,.4); color: #7FF0E0;
  margin-bottom: 22px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 10px var(--teal); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.hero h1 { font-size: clamp(30px, 4.4vw, 52px); line-height: 1.22; font-weight: 800; letter-spacing: 1px; }
.hero h1 .grad {
  background: linear-gradient(90deg, #4D9FFF, #00E6C3);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin-top: 18px; font-size: 17px; color: #B9C6DE; max-width: 560px; }
.hero-kws { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.hero-kws span {
  font-size: 12.5px; color: #9FB3D1; padding: 4px 12px;
  border: 1px solid rgba(255,255,255,.16); border-radius: 999px;
}
.hero-actions { margin-top: 34px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { margin-top: 46px; display: flex; gap: 0; }
.hero-stats .stat { padding: 0 34px; border-left: 1px solid rgba(255,255,255,.14); }
.hero-stats .stat:first-child { padding-left: 0; border-left: none; }
.hero-stats b { display: block; font-size: 30px; font-weight: 800; background: linear-gradient(90deg,#4D9FFF,#00E6C3); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats span { font-size: 13px; color: #93A5C4; }
.hero-visual { position: relative; }
.hero-visual .frame {
  border-radius: 22px; overflow: hidden; box-shadow: 0 30px 80px rgba(0,0,0,.45);
  border: 1px solid rgba(255,255,255,.14); background: #fff;
}
.hero-visual .frame img { width: 100%; height: 420px; object-fit: cover; }
.hero-float {
  position: absolute; bottom: -22px; left: -26px;
  background: rgba(255,255,255,.97); color: var(--ink);
  border-radius: 16px; padding: 16px 22px; box-shadow: var(--shadow-lg);
  display: flex; gap: 22px;
}
.hero-float .f b { display: block; font-size: 19px; color: var(--primary); }
.hero-float .f span { font-size: 12px; color: var(--muted); }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-head .kicker {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 3px;
  color: var(--primary); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 800; letter-spacing: .5px; }
.section-head p { margin-top: 14px; color: var(--muted); font-size: 16px; }

/* ---------- 产品卡片 ---------- */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.product-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: all .3s ease; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card .pic { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--bg-soft); }
.product-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .pic img { transform: scale(1.06); }
.product-card .tag {
  position: absolute; top: 12px; left: 12px;
  background: rgba(11,95,255,.92); color: #fff; font-size: 12px; font-weight: 600;
  padding: 4px 12px; border-radius: 999px;
}
.product-card .body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.product-card h3 { font-size: 17.5px; font-weight: 700; line-height: 1.4; }
.product-card h3 a:hover { color: var(--primary); }
.product-card .model { font-size: 12.5px; color: var(--teal); font-weight: 700; margin-top: 3px; letter-spacing: .5px; }
.product-card p { font-size: 14px; color: var(--muted); margin-top: 9px; flex: 1; }
.product-card .more { margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 5px; }
.product-card .more:hover { gap: 9px; }
.more { transition: gap .2s; }

/* ---------- 优势区 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card {
  background: #fff; border-radius: var(--radius); padding: 30px 28px;
  border: 1px solid var(--line); transition: all .3s; position: relative; overflow: hidden;
}
.adv-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--grad-brand); opacity: 0; transition: opacity .3s;
}
.adv-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.adv-card:hover::before { opacity: 1; }
.adv-card .num { font-size: 13px; font-weight: 800; color: rgba(11,95,255,.35); letter-spacing: 1px; }
.adv-card h3 { font-size: 17px; margin-top: 8px; font-weight: 700; }
.adv-card p { font-size: 14px; color: var(--muted); margin-top: 9px; }

/* ---------- 应用行业 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.app-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 12px; text-align: center; transition: all .3s; display: block;
}
.app-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(11,95,255,.4); }
.app-item .ico { font-size: 34px; line-height: 1; }
.app-item b { display: block; margin-top: 12px; font-size: 15px; }
.app-item span { display: block; font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ---------- 资讯卡片 ---------- */
.news-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: all .3s; display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.news-card .pic { aspect-ratio: 16/9; overflow: hidden; background: var(--bg-soft); }
.news-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .pic img { transform: scale(1.05); }
.news-card .body { padding: 20px 22px; flex: 1; }
.news-card .meta { display: flex; gap: 14px; font-size: 12.5px; color: var(--muted); }
.news-card .meta .cat { color: var(--teal); font-weight: 700; }
.news-card h3 { font-size: 16.5px; margin-top: 9px; line-height: 1.5; font-weight: 700; }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 13.5px; color: var(--muted); margin-top: 8px; }

/* ---------- CTA 大横幅 ---------- */
.cta-band {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(700px 300px at 90% 20%, rgba(0,194,168,.3), transparent 60%),
    linear-gradient(135deg, #0A1630, #123B7A);
  border-radius: 24px; padding: 56px 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 800; }
.cta-band p { color: #B9C6DE; margin-top: 8px; }
.cta-band .btn { background: #fff; color: var(--primary); box-shadow: 0 8px 24px rgba(0,0,0,.25); }
.cta-band .btn:hover { transform: translateY(-2px); }

/* ---------- 面包屑 ---------- */
.breadcrumb { padding: 22px 0 0; font-size: 13.5px; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: #C4CCDB; }

/* ---------- 页头横幅（内页） ---------- */
.page-hero {
  background:
    radial-gradient(800px 300px at 80% 0%, rgba(0,194,168,.18), transparent 55%),
    linear-gradient(160deg, #0A1630 0%, #0D2247 60%, #0A2E52 100%);
  color: #fff; padding: 60px 0 64px;
}
.page-hero h1 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; }
.page-hero p { margin-top: 10px; color: #A9BAD6; font-size: 15.5px; max-width: 640px; }
.page-hero .breadcrumb { padding: 0 0 18px; }
.page-hero .breadcrumb a, .page-hero .breadcrumb .sep { color: #7C90B5; }

/* ---------- 文章正文 ---------- */
.article-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 40px; padding: 48px 0 72px; }
.article-main { background: #fff; }
.article-main h1 { font-size: clamp(22px, 2.8vw, 30px); line-height: 1.4; font-weight: 800; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 16px; padding-bottom: 20px; border-bottom: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
.article-content { margin-top: 26px; font-size: 16px; color: #2A3550; }
.article-content h2 { font-size: 21px; margin: 34px 0 14px; padding-left: 13px; border-left: 4px solid var(--primary); font-weight: 700; }
.article-content h3 { font-size: 18px; margin: 26px 0 12px; font-weight: 700; }
.article-content p { margin: 12px 0; }
.article-content img { border-radius: 12px; margin: 18px auto; box-shadow: var(--shadow-sm); }
.article-content ul, .article-content ol { margin: 12px 0 12px 22px; }
.article-content ul li { list-style: disc; margin: 6px 0; }
.article-content ol li { list-style: decimal; margin: 6px 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
.article-content th { background: var(--bg-soft); font-weight: 700; }
.article-content th, .article-content td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.article-content blockquote {
  margin: 18px 0; padding: 14px 20px; background: var(--bg-soft);
  border-left: 4px solid var(--teal); border-radius: 0 10px 10px 0; color: var(--ink-soft);
}
.article-tags { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 8px; }
.article-tags a { font-size: 12.5px; background: var(--bg-soft); border: 1px solid var(--line); padding: 4px 13px; border-radius: 999px; color: var(--ink-soft); }
.article-tags a:hover { color: var(--primary); border-color: var(--primary); }

/* ---------- 侧栏 ---------- */
.sidebar .widget { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin-bottom: 22px; }
.sidebar .widget h3 { font-size: 16px; font-weight: 700; padding-bottom: 12px; margin-bottom: 14px; border-bottom: 2px solid var(--bg-soft); position: relative; }
.sidebar .widget h3::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 44px; height: 2px; background: var(--grad-brand); }
.side-list li { padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.side-list li:last-child { border-bottom: none; }
.side-list a { color: var(--ink-soft); display: block; }
.side-list a:hover { color: var(--primary); }
.side-list .date { float: right; font-size: 12px; color: var(--muted); }
.side-contact { background: linear-gradient(160deg, #0D2247, #123B7A); color: #fff; border: none; }
.side-contact h3 { color: #fff; border-bottom-color: rgba(255,255,255,.15); }
.side-contact h3::after { background: #00E6C3; }
.side-contact p { font-size: 14px; color: #B9C6DE; margin: 7px 0; }
.side-contact .big { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: .5px; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 14px; font-weight: 600; }
.form-field label .req { color: #E5484D; }
.form-field input, .form-field textarea, .form-field select {
  padding: 12px 15px; border: 1.5px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: inherit; transition: border-color .2s, box-shadow .2s; background: #fff;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(11,95,255,.13);
}
.form-field textarea { min-height: 130px; resize: vertical; }
.form-msg { padding: 13px 18px; border-radius: 10px; font-size: 14.5px; margin-bottom: 20px; }
.form-msg.ok { background: #E8F8F3; color: #067A5B; border: 1px solid #9FE3CE; }
.form-msg.err { background: #FDECEC; color: #B42318; border: 1px solid #F5B5B5; }

/* ---------- FAQ ---------- */
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 14px; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 15.5px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--primary); transition: transform .25s; flex-shrink: 0; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 22px 18px; color: var(--ink-soft); font-size: 14.5px; }

/* ---------- 分页 ---------- */
.pagination { display: flex; justify-content: center; gap: 8px; margin: 44px 0 0; }
.pagination a, .pagination span {
  min-width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); border-radius: 10px; font-size: 14.5px; padding: 0 13px;
  background: #fff; color: var(--ink-soft); transition: all .2s;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--grad-brand); color: #fff; border-color: transparent; font-weight: 700; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0A1428; color: #96A5C2; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 64px 0 46px; }
.footer-col h4 { color: #fff; font-size: 15.5px; margin-bottom: 18px; font-weight: 700; }
.footer-about img { width: 44px; height: 44px; border-radius: 10px; margin-bottom: 14px; }
.footer-about p { font-size: 13.5px; line-height: 1.8; }
.footer-tags { margin-top: 16px; display: flex; gap: 8px; }
.footer-tags span { font-size: 12px; padding: 3px 12px; border: 1px solid rgba(0,230,195,.4); color: #7FF0E0; border-radius: 999px; }
.footer-col > a { display: block; font-size: 14px; padding: 5px 0; color: #96A5C2; transition: color .2s, padding-left .2s; }
.footer-col > a:hover { color: #fff; padding-left: 5px; }
.footer-contact p { font-size: 14px; margin: 6px 0; }
.footer-contact a:hover { color: #fff; }
.wechat-num { color: #7FF0E0; font-weight: 600; letter-spacing: .5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.09); padding: 20px 0 26px; font-size: 12.5px; color: #61718F; }
.footer-bottom p { margin: 3px 0; }

/* ---------- 移动端底部快捷栏 / 弹层 / 返回顶部 ---------- */
.mobile-cta {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: #fff; border-top: 1px solid var(--line);
  padding: 6px 0 max(6px, env(safe-area-inset-bottom));
}
.mobile-cta a { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px; font-size: 11.5px; color: var(--ink-soft); padding: 5px 0; }
.mobile-cta a svg { color: var(--primary); }
.mobile-cta a:last-child { color: #fff; font-weight: 600; }
.mobile-cta a:last-child svg { color: #fff; }
.mobile-cta a:last-child { background: var(--grad-brand); margin: 4px 10px; border-radius: 10px; flex: 0 0 88px; justify-content: center; }
.wechat-modal { position: fixed; inset: 0; z-index: 200; background: rgba(10,20,40,.6); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; padding: 20px; }
.wechat-modal[hidden] { display: none; }
.wechat-modal-box { background: #fff; border-radius: 20px; padding: 36px 32px; max-width: 360px; width: 100%; text-align: center; position: relative; }
.wechat-modal-box h3 { font-size: 18px; }
.wechat-big { font-size: 28px; font-weight: 800; color: var(--primary); letter-spacing: 1px; margin: 14px 0 6px; }
.wechat-modal-box p { font-size: 13.5px; color: var(--muted); }
.wechat-modal-box .btn { margin-top: 18px; width: 100%; }
.wechat-close { position: absolute; top: 10px; right: 14px; background: none; border: none; font-size: 26px; color: var(--muted); cursor: pointer; }
.back-top {
  position: fixed; right: 22px; bottom: 86px; z-index: 80;
  width: 44px; height: 44px; border-radius: 12px; border: none; cursor: pointer;
  background: var(--grad-brand); color: #fff; font-size: 19px;
  box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transition: all .3s;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-3px); }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; padding: 60px 0 70px; }
  .hero-visual { display: none; }
  .grid-3, .grid-4, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(3, 1fr); }
  .article-wrap { grid-template-columns: 1fr; }
  .sidebar { order: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav {
    display: none; position: absolute; top: 74px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px 18px 18px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md); gap: 2px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 10px; border-radius: 8px; }
  .main-nav a.active::after { display: none; }
  .header-cta .btn { display: none; }
  .nav-toggle { display: block; margin-left: auto; }
  .phone-link { font-size: 13.5px; }
  .grid-3, .grid-4, .grid-2, .adv-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 18px; }
  .hero-stats .stat { padding: 0 18px; }
  .section { padding: 60px 0; }
  .cta-band { padding: 40px 28px; text-align: center; justify-content: center; }
  .mobile-cta { display: flex; }
  body { padding-bottom: 58px; }
  .back-top { bottom: 74px; right: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; padding: 46px 0 30px; }
}