html { scroll-behavior: smooth; }
body { color: #202124; background: #fff; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
a, a:hover, a:focus { text-decoration: none; }
.site-container { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.site-header { background: #fff; }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: #202124; font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.brand:hover, .brand:focus { color: #c91420; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: #df1823; color: white; font-size: 17px; font-style: italic; }
nav { display: flex; gap: 32px; }
nav a { color: #555b63; font-size: 14px; }
nav a:hover, nav a:focus { color: #df1823; }
.hero { overflow: hidden; background: #f5f5f6; }
.hero-inner { min-height: 590px; display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.hero-copy { flex: 1; padding: 72px 0; }
.eyebrow { color: #d51924; font-size: 12px; font-weight: 700; letter-spacing: .18em; }
.hero h1 { margin: 22px 0; font-size: clamp(42px, 5vw, 64px); font-weight: 700; line-height: 1.25; letter-spacing: -.03em; }
.hero h1 span { color: #df1823; }
.hero-description { max-width: 490px; color: #666b73; font-size: 16px; line-height: 2; }
.hero-link { display: inline-block; margin-top: 28px; padding: 14px 25px; border-radius: 4px; color: #fff; background: #df1823; font-size: 14px; font-weight: 600; }
.hero-link:hover, .hero-link:focus { color: #fff; background: #b90f1a; }
.hero-link span { margin-left: 14px; }
.hero-visual { position: relative; width: 40%; display: flex; justify-content: center; align-self: flex-end; padding: 42px 0 0; }
.hero-halo { position: absolute; width: 390px; height: 390px; max-width: 100%; border-radius: 50%; background: #ece1e2; top: 85px; }
.hero-visual img { position: relative; width: 255px; max-width: 85%; border: 7px solid #202124; border-bottom: 0; border-radius: 30px 30px 0 0; box-shadow: 0 20px 55px #25252b24; }
.features { padding: 90px 0 80px; text-align: center; }
.features h2 { margin: 14px 0; font-size: 34px; font-weight: 700; }
.section-intro { color: #73777e; font-size: 15px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 46px; text-align: left; }
.feature-card { padding: 22px 22px 28px; border-radius: 12px; background: #f6f6f7; }
.screen { height: 340px; overflow: hidden; display: flex; justify-content: center; align-items: flex-start; background: #e9eaed; border-radius: 8px; }
.screen img { height: 100%; width: auto; max-width: 100%; object-fit: contain; object-position: top; }
.feature-number { margin: 25px 0 10px; color: #d51924; font-size: 12px; font-weight: 700; letter-spacing: .05em; }
.feature-card h3 { margin: 0 0 10px; font-size: 20px; font-weight: 700; }
.feature-card > p:last-child { color: #73777e; font-size: 14px; line-height: 1.8; }
.disclaimer { margin-top: 30px; color: #8a8d92; font-size: 12px; }
.site-footer { padding: 26px 0; color: #bfc1c5; background: #252629; font-size: 13px; }
.site-footer .site-container { display: flex; justify-content: space-between; gap: 20px; }
@media (min-width: 701px) and (max-width: 950px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .site-container { width: calc(100% - 36px); }
  .header-inner { min-height: 66px; }
  .brand { font-size: 15px; }
  nav { gap: 16px; }
  .hero-inner { min-height: 0; flex-direction: column; gap: 0; }
  .hero-copy { padding: 65px 0 28px; width: 100%; }
  .hero h1 { font-size: 42px; }
  .hero-visual { width: 100%; padding-top: 25px; }
  .hero-visual img { width: 205px; }
  .hero-halo { width: 290px; height: 290px; top: 40px; }
  .features { padding: 65px 0; }
  .features h2 { font-size: 28px; }
  .feature-grid { grid-template-columns: 1fr; max-width: 400px; margin: 35px auto 0; }
  .screen { height: 380px; }
  .site-footer .site-container { flex-direction: column; gap: 8px; }
}