@charset "UTF-8";
/* 山东小飞科技有限公司 · 官网样式表
   无外部依赖 / 无 webfont / 可直接静态托管 */

:root {
  --ink: #0f1b33;
  --ink-2: #243350;
  --muted: #5f6f89;
  --line: #e3e9f2;
  --line-soft: #eef2f8;
  --bg: #ffffff;
  --surface: #f6f9fd;
  --surface-2: #eef4fc;
  --brand: #2563eb;
  --brand-dark: #1743ad;
  --brand-soft: #e8f0ff;
  --cyan: #06b6d4;
  --cyan-soft: #dff7fb;
  --navy: #081633;
  --navy-2: #123063;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 14px 36px rgba(16, 38, 84, .07);
  --shadow-lg: 0 24px 60px rgba(16, 38, 84, .13);
  --max: 1180px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink-2);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; }
a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-dark); }
h1, h2, h3, h4 { color: var(--ink); font-weight: 700; line-height: 1.35; letter-spacing: -.015em; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.35rem); }
h2 { font-size: clamp(1.55rem, 2.9vw, 2.25rem); }
h3 { font-size: 1.16rem; }
p { margin: 0 0 1.1em; }
ul, ol { padding-left: 1.25em; }
li { margin: .35em 0; }
strong { color: var(--ink); font-weight: 700; }
:focus-visible { outline: 3px solid rgba(37, 99, 235, .45); outline-offset: 3px; border-radius: 4px; }
::selection { background: #cfe0ff; color: var(--navy); }

.container { width: min(100% - 40px, var(--max)); margin-inline: auto; }
.section { padding: clamp(60px, 8vw, 104px) 0; }
.section--tight { padding: clamp(44px, 5vw, 68px) 0; }
.section--surface { background: var(--surface); border-block: 1px solid var(--line-soft); }
.section-head { max-width: 760px; margin-bottom: 46px; }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .8rem; font-weight: 700; letter-spacing: .12em;
  color: var(--brand); text-transform: uppercase;
  background: var(--brand-soft); border-radius: 100px; padding: 6px 14px;
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }
.lead { font-size: 1.075rem; color: var(--muted); line-height: 1.85; }
.section-head p { color: var(--muted); font-size: 1.02rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .93);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
  transition: box-shadow .25s ease;
}
.site-header.is-scrolled { box-shadow: 0 6px 24px rgba(16, 38, 84, .08); }
.header-inner { height: 72px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); flex-shrink: 0; }
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(140deg, #2563eb, #06b6d4);
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 6px 16px rgba(37, 99, 235, .28);
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 1rem; font-weight: 800; letter-spacing: .01em; }
.brand-sub { font-size: .66rem; color: var(--muted); letter-spacing: .18em; font-weight: 600; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  color: var(--ink-2); font-size: .93rem; font-weight: 600;
  padding: 9px 13px; border-radius: 9px; white-space: nowrap;
}
.nav a:hover, .nav a.is-active { color: var(--brand); background: var(--brand-soft); }
.header-cta { display: flex; align-items: center; gap: 12px; margin-left: 8px; }
.phone-link { font-weight: 800; color: var(--ink); font-size: .95rem; white-space: nowrap; }
.phone-link:hover { color: var(--brand); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 12px 22px; border-radius: 10px; font-size: .94rem; font-weight: 700;
  border: 1px solid transparent; cursor: pointer; transition: all .22s ease;
  font-family: inherit; line-height: 1.4; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 20px rgba(37, 99, 235, .24); }
.btn-primary:hover { background: var(--brand-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 26px rgba(37, 99, 235, .3); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn-light { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .28); }
.btn-light:hover { background: rgba(255, 255, 255, .2); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 9px 16px; font-size: .87rem; }
.nav-toggle {
  display: none; margin-left: auto; width: 42px; height: 42px;
  border: 1px solid var(--line); background: #fff; border-radius: 10px;
  align-items: center; justify-content: center; cursor: pointer; color: var(--ink);
}
.nav-toggle svg { width: 20px; height: 20px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: radial-gradient(1000px 620px at 78% 8%, rgba(6, 182, 212, .22), transparent 62%),
              radial-gradient(760px 520px at 12% 92%, rgba(37, 99, 235, .32), transparent 65%),
              linear-gradient(126deg, #071329 0%, #0c224c 52%, #0a1a3a 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  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: 58px 58px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}
.hero::after {
  content: ""; position: absolute; right: -160px; top: -180px; width: 520px; height: 520px;
  border: 1px solid rgba(255, 255, 255, .09); border-radius: 50%; pointer-events: none;
  box-shadow: 0 0 0 80px rgba(255, 255, 255, .025), 0 0 0 160px rgba(255, 255, 255, .018);
}
.hero-inner { position: relative; z-index: 2; padding: clamp(72px, 9vw, 118px) 0 clamp(64px, 7vw, 92px); }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px; font-size: .82rem; font-weight: 600;
  color: #b9d5ff; background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .16);
  padding: 8px 16px; border-radius: 100px; margin-bottom: 26px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 4px rgba(52, 211, 153, .2); }
.hero h1 { color: #fff; max-width: 900px; margin-bottom: 22px; letter-spacing: -.025em; }
.hero h1 .grad { background: linear-gradient(90deg, #63b3ff, #67e8f9); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-desc { font-size: clamp(1.02rem, 1.6vw, 1.16rem); color: #c3d3ee; max-width: 720px; line-height: 1.9; margin-bottom: 32px; }
.hero-desc strong { color: #fff; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 48px; }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 10px 26px; font-size: .88rem; color: #a9c0e4;
  border-top: 1px solid rgba(255, 255, 255, .13); padding-top: 24px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta svg { width: 15px; height: 15px; color: #67e8f9; flex: none; }

.hero-visual {
  position: absolute; z-index: 1; right: 0; top: 50%; transform: translateY(-46%);
  width: 360px; opacity: .55; pointer-events: none;
}
@media (max-width: 1080px) { .hero-visual { display: none; } }

/* ---------- Fact strip ---------- */
.fact-strip { background: #fff; border-bottom: 1px solid var(--line-soft); }
.fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.fact {
  padding: 30px 22px; border-right: 1px solid var(--line-soft);
  display: flex; gap: 14px; align-items: flex-start;
}
.fact:last-child { border-right: 0; }
.fact-icon {
  width: 40px; height: 40px; flex: none; border-radius: 11px; display: grid; place-items: center;
  background: var(--brand-soft); color: var(--brand);
}
.fact-icon svg { width: 20px; height: 20px; }
.fact-label { display: block; font-size: .78rem; color: var(--muted); font-weight: 600; letter-spacing: .04em; margin-bottom: 3px; }
.fact-value { display: block; font-size: .95rem; font-weight: 700; color: var(--ink); line-height: 1.5; }
.fact-value a { color: var(--ink); }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: #c8dbff; }
.card-icon {
  width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--brand-soft), var(--cyan-soft)); color: var(--brand); margin-bottom: 18px;
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: 10px; font-size: 1.13rem; }
.card p { color: var(--muted); font-size: .93rem; margin-bottom: 14px; }
.card-link { font-size: .89rem; font-weight: 700; display: inline-flex; align-items: center; gap: 5px; }
.card-link::after { content: "→"; transition: transform .2s ease; }
.card:hover .card-link::after { transform: translateX(4px); }
.tag-list { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; padding: 0; list-style: none; }
.tag-list li {
  margin: 0; font-size: .77rem; font-weight: 600; color: var(--brand-dark);
  background: var(--surface-2); border-radius: 6px; padding: 4px 10px;
}
.service-num { font-size: .76rem; font-weight: 800; color: #9db3d8; letter-spacing: .12em; display: block; margin-bottom: 8px; }

/* ---------- Split / about ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split-visual {
  position: relative; border-radius: 22px; overflow: hidden; min-height: 340px;
  background: linear-gradient(140deg, #0c224c, #123b7d 55%, #0e7490);
  border: 1px solid rgba(255, 255, 255, .12); box-shadow: var(--shadow-lg);
  padding: 34px; color: #fff; display: flex; flex-direction: column; justify-content: space-between;
}
.split-visual::before {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background-image: linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 38px 38px;
}
.split-visual > * { position: relative; z-index: 1; }
.visual-kicker { font-size: .8rem; letter-spacing: .16em; color: #8fc7ff; font-weight: 700; }
.visual-title { font-size: 1.7rem; font-weight: 700; color: #fff; line-height: 1.45; margin: 0; }
.visual-rows { display: grid; gap: 10px; margin-top: 26px; }
.visual-row {
  display: flex; align-items: center; gap: 10px; font-size: .9rem; color: #d7e7ff;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 10px; padding: 10px 14px;
}
.visual-row svg { width: 16px; height: 16px; color: #67e8f9; flex: none; }

.check-list { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 13px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; margin: 0; color: var(--ink-2); }
.check-list svg { width: 19px; height: 19px; color: var(--brand); flex: none; margin-top: 4px; }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding: 26px 22px 22px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  display: block; font-size: 1.5rem; font-weight: 800; color: #cbdcf8; line-height: 1; margin-bottom: 14px;
}
.step h3 { font-size: 1.02rem; margin-bottom: 8px; }
.step p { font-size: .88rem; color: var(--muted); margin: 0; }
@media (min-width: 900px) {
  .step:not(:last-child)::after {
    content: "→"; position: absolute; right: -16px; top: 34px; color: #a9c4ee; font-size: 1.2rem; z-index: 2;
  }
}

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: .92rem; }
th, td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
th { background: var(--surface-2); color: var(--ink); font-weight: 700; white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #fafcff; }
td a { font-weight: 700; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 880px; margin-inline: auto; display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.faq-item[open] { border-color: #c8dbff; box-shadow: var(--shadow); }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 18px 22px; font-weight: 700; color: var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.35rem; color: var(--brand); font-weight: 400; line-height: 1; flex: none; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 22px 20px; color: var(--muted); font-size: .94rem; border-top: 1px solid var(--line-soft); padding-top: 14px; }
.faq-item .faq-body p:last-child { margin-bottom: 0; }

/* ---------- CTA ---------- */
.cta-band {
  position: relative; overflow: hidden; color: #fff; text-align: center;
  background: linear-gradient(120deg, #123b8f, #1a63c8 52%, #0e8ba8);
  padding: clamp(60px, 7vw, 88px) 0;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; opacity: .35;
  background-image: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, .22) 0, transparent 38%),
                    radial-gradient(circle at 82% 78%, rgba(255, 255, 255, .18) 0, transparent 40%);
}
.cta-band > * { position: relative; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #dbe9ff; max-width: 660px; margin: 0 auto 28px; }
.cta-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }
.cta-band .btn-light { background: #fff; color: var(--brand-dark); border-color: #fff; }
.cta-band .btn-light:hover { background: #eef5ff; color: var(--brand-dark); }
.cta-band .btn-outline-light { border-color: rgba(255, 255, 255, .6); color: #fff; background: transparent; }
.cta-band .btn-outline-light:hover { background: rgba(255, 255, 255, .13); color: #fff; }
.cta-band p.cta-note { margin: 26px auto 0; font-size: .85rem; color: #c6ddff; max-width: 900px; }

/* ---------- Breadcrumb & page hero ---------- */
.page-hero { background: var(--surface); border-bottom: 1px solid var(--line-soft); padding: 40px 0 44px; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .85rem; color: var(--muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .sep { color: #b8c5d9; }
.breadcrumb [aria-current] { color: var(--ink); font-weight: 600; }
.page-hero h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin-bottom: 12px; }
.page-hero .lead { margin-bottom: 0; max-width: 820px; }
.page-hero .page-meta { margin-top: 18px; font-size: .84rem; color: var(--muted); }

/* ---------- Article layout ---------- */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 48px; align-items: start; }
.prose h2 { font-size: 1.5rem; margin-top: 1.9em; margin-bottom: .7em; padding-top: .2em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.5em; }
.prose p { color: var(--ink-2); }
.prose ul { color: var(--ink-2); }
.prose .definition {
  background: var(--surface); border-left: 4px solid var(--brand); border-radius: 0 12px 12px 0;
  padding: 20px 24px; font-size: 1.02rem; color: var(--ink); margin: 0 0 28px;
}
.prose .definition p:last-child { margin-bottom: 0; }
.info-box { background: var(--brand-soft); border-radius: 12px; padding: 20px 24px; margin: 24px 0; }
.info-box p:last-child { margin-bottom: 0; }
.pill-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 0; list-style: none; margin: 18px 0 26px; }
.pill-grid li {
  margin: 0; background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; font-size: .92rem; color: var(--ink-2); display: flex; gap: 10px; align-items: flex-start;
}
.pill-grid li::before { content: "✓"; color: var(--brand); font-weight: 800; flex: none; }
.sidebar { position: sticky; top: 96px; display: grid; gap: 20px; }
.side-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.side-card h3 { font-size: .98rem; margin-bottom: 14px; }
.side-nav { list-style: none; padding: 0; margin: 0; display: grid; gap: 2px; }
.side-nav a { display: block; padding: 8px 10px; border-radius: 8px; color: var(--muted); font-size: .88rem; font-weight: 600; }
.side-nav a:hover { background: var(--surface-2); color: var(--brand); }
.side-contact { background: linear-gradient(150deg, #0c224c, #164e9c); color: #fff; }
.side-contact h3 { color: #fff; }
.side-contact p { color: #c9dcf9; font-size: .88rem; }
.side-contact a { color: #fff; font-weight: 700; }
.side-contact .btn { width: 100%; margin-top: 8px; }

/* ---------- Footer ---------- */
.site-footer { background: #07142e; color: #a8bcd9; padding: 66px 0 0; font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.25fr; gap: 40px; padding-bottom: 46px; }
.site-footer h3 { color: #fff; font-size: .96rem; margin-bottom: 18px; }
.site-footer p { color: #a8bcd9; line-height: 1.85; }
.footer-brand { display: flex; align-items: center; gap: 11px; margin-bottom: 18px; }
.footer-brand .brand-name { color: #fff; font-size: 1.05rem; }
.footer-brand .brand-sub { color: #8fa7c9; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-links a { color: #a8bcd9; }
.footer-links a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; line-height: 1.7; }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 5px; color: #5ec8e5; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1); padding: 22px 0; display: flex;
  flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; align-items: center; font-size: .82rem;
}
.footer-bottom a { color: #a8bcd9; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .beian { display: inline-flex; align-items: center; gap: 8px; }
.footer-bottom-links { display: flex; flex-wrap: wrap; gap: 18px; }

/* ---------- Utilities ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: #fff; color: var(--brand);
  padding: 12px 18px; z-index: 100; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 50; width: 44px; height: 44px;
  border: 1px solid var(--line); background: #fff; color: var(--brand); border-radius: 12px;
  box-shadow: var(--shadow); cursor: pointer; display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s ease;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top svg { width: 18px; height: 18px; }
.copy-btn { background: none; border: 0; color: var(--brand); font: inherit; font-size: .82rem; cursor: pointer; padding: 0 0 0 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0 !important; }
.mt-30 { margin-top: 30px; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .layout { grid-template-columns: minmax(0, 1fr) 250px; gap: 32px; }
}
@media (max-width: 900px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .site-header.is-open .nav {
    display: flex; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px; margin: 0; padding: 12px 20px 20px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg);
  }
  .site-header.is-open .nav a { padding: 12px 14px; font-size: 1rem; }
  .site-header.is-open .header-cta { display: block; margin: 8px 0 0; }
  .site-header.is-open .header-cta .btn { width: 100%; }
  .site-header.is-open .phone-link { display: none; }
  .split { grid-template-columns: 1fr; gap: 34px; }
  .split-visual { min-height: 290px; }
  .fact-grid { grid-template-columns: repeat(2, 1fr); }
  .fact:nth-child(2) { border-right: 0; }
  .fact:nth-child(-n+2) { border-bottom: 1px solid var(--line-soft); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .layout { grid-template-columns: 1fr; gap: 36px; }
  .sidebar { position: static; grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .container { width: min(100% - 32px, var(--max)); }
  .grid-2, .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .fact-grid { grid-template-columns: 1fr; }
  .fact { border-right: 0; border-bottom: 1px solid var(--line-soft); padding: 20px 4px; }
  .fact:last-child { border-bottom: 0; }
  .pill-grid { grid-template-columns: 1fr; }
  .sidebar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-inner { padding-top: 62px; padding-bottom: 58px; }
  .hero h1 { font-size: 1.78rem; line-height: 1.42; }
  .hero-actions .btn { flex: 1 1 100%; }
  .header-inner { height: 64px; }
  .site-header.is-open .nav { top: 64px; }
  .card { padding: 22px; }
  .section-head { margin-bottom: 32px; }
  .cta-actions .btn { flex: 1 1 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}