:root {
  --bg: #ffffff;
  --soft: #f6f7fb;
  --line: #e5e7eb;
  --text: #111827;
  --muted: #4b5563;
  --navy: #111a35;
  --bluegray: #6d7aa8;
  --primary: #4357ff;
  --accent: #ff6a3d;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.hero img, .hero-visual img, .feature-image img, .card img, .visual img { max-width: 100%; height: auto; object-fit: contain; }

.site-logo, .logo img, .brand img, .header-logo img, .nav-logo img {
  display: block;
  width: auto;
  height: auto;
  max-height: 40px;
  max-width: 190px;
  object-fit: contain;
}

.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.hh-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.98); border-bottom: 1px solid var(--line); }
.header-row { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { min-height: 40px; display: inline-flex; align-items: center; }
.hh-nav { display: flex; gap: 20px; font-size: 14px; color: var(--muted); }
.hh-menu-btn { display: none; border: 0; background: var(--navy); color: #fff; padding: 10px 14px; border-radius: 999px; }

.hero { padding: 70px 0 36px; background: linear-gradient(180deg, #fff 0%, #f9fbff 100%); }
.hero-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 42px; align-items: center; }
.eyebrow { display: inline-flex; padding: 8px 14px; border-radius: 999px; background: rgba(109,122,168,.12); color: var(--bluegray); font-size: 13px; font-weight: 700; }
.hero-copy h1 { margin: 18px 0; font-size: clamp(34px, 5vw, 56px); line-height: 1.05; color: var(--navy); }
.hero-copy p { margin: 0 0 20px; line-height: 1.9; color: var(--muted); font-size: 16px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.hero-actions a { display: inline-flex; align-items: center; justify-content: center; min-width: 150px; padding: 14px 22px; border-radius: 16px; background: var(--accent); color: #fff; font-weight: 700; }
.hero-actions .ghost { background: #fff; border: 1px solid var(--line); color: var(--navy); }

.hero-visual { display: grid; grid-template-columns: .92fr .88fr; gap: 18px; align-items: stretch; }
.phone-card, .side-card, .visual-box { border: 1px solid var(--line); border-radius: 28px; background: #fff; }
.phone-card { padding: 24px; box-shadow: 0 28px 60px rgba(67,87,255,.08); }
.phone-card img { max-height: 420px; margin: 0 auto; }
.side-card { padding: 18px; background: linear-gradient(180deg, rgba(67,87,255,.06), rgba(255,255,255,1)); display: grid; place-items: center; }

.section { padding: 72px 0; }
.air { background: #fbfcff; }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head h2 { margin: 0 0 12px; font-size: 30px; color: var(--navy); }
.section-head p, .split p { margin: 0; color: var(--muted); line-height: 1.9; }

.soft-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.soft-grid article { padding: 24px; border: 1px solid var(--line); border-radius: 24px; background: #fff; }
.soft-grid span { display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; background: rgba(67,87,255,.08); font-size: 22px; }
.soft-grid h3 { margin: 16px 0 10px; font-size: 20px; color: var(--navy); }
.soft-grid p { margin: 0; color: var(--muted); line-height: 1.8; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
.reverse { direction: rtl; }
.reverse > * { direction: ltr; }
.note-stack { display: grid; gap: 14px; }
.note-stack article { padding: 22px; border-radius: 24px; background: #fff; border: 1px solid var(--line); }
.note-stack strong { display: block; margin-bottom: 8px; color: var(--navy); }
.note-stack p { margin: 0; color: var(--muted); line-height: 1.8; }

.visual-box { padding: 24px; min-height: 320px; display: grid; place-items: center; }
.visual-box img { max-height: 360px; margin: 0 auto; }

.faq-section { background: linear-gradient(180deg, #f7f9ff 0%, #fff 100%); }
.faq-accordion { display: grid; gap: 14px; }
.faq-accordion details { border: 1px solid var(--line); border-radius: 22px; background: #fff; padding: 0 20px; }
.faq-accordion summary { list-style: none; cursor: pointer; padding: 18px 0; display: flex; align-items: center; gap: 14px; color: var(--navy); font-weight: 700; }
.faq-accordion summary span { width: 34px; height: 34px; border-radius: 12px; display: grid; place-items: center; background: rgba(67,87,255,.08); color: var(--primary); }
.faq-accordion p { margin: 0 0 18px; color: var(--muted); line-height: 1.8; }

.search-section { padding-top: 0; }
.search-links { display: flex; flex-wrap: wrap; gap: 12px; }
.search-links span { padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--bluegray); font-weight: 600; font-size: 14px; }

.cta-section { padding: 0 0 80px; }
.cta-card { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 30px 32px; border-radius: 30px; background: var(--navy); color: #fff; }
.cta-card h2 { margin: 0 0 10px; font-size: 28px; }
.cta-card p { margin: 0; color: rgba(255,255,255,.78); line-height: 1.8; }
.cta-card a { white-space: nowrap; padding: 14px 22px; border-radius: 16px; background: var(--accent); color: #fff; font-weight: 700; }

.hh-backtop { position: fixed; right: 24px; bottom: 24px; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--primary); color: #fff; opacity: 0; pointer-events: none; transition: .2s ease; }
.hh-backtop.is-visible { opacity: 1; pointer-events: auto; }

@media (max-width: 980px) {
  .hh-menu-btn { display: inline-flex; }
  .hh-nav { display: none; position: absolute; top: 74px; left: 20px; right: 20px; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 16px; }
  .hh-nav.is-open { display: flex; }
  .hero-grid, .hero-visual, .soft-grid, .split { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .wrap { width: min(100% - 24px, 1120px); }
  .hero-copy h1 { font-size: 34px; }
  .cta-card { flex-direction: column; align-items: flex-start; }
}

.brand-logo,
.logo-wrap,
.header-logo,
.nav-brand,
.brand,
.hh-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 6px 14px;
  border-radius: 12px;
  background: #10172a;
  text-decoration: none;
  line-height: 1;
  flex-shrink: 0;
}

.site-logo,
.brand-logo img,
.logo-wrap img,
.header-logo img,
.nav-brand img,
.logo img,
.brand img,
.hh-brand img {
  display: block;
  width: auto;
  height: auto;
  max-height: 36px;
  max-width: 190px;
  object-fit: contain;
}