* {
  box-sizing: border-box;
}

:root {
  --blue: #0d63df;
  --blue-dark: #073a9e;
  --blue-soft: #e9f4ff;
  --yellow: #ffd447;
  --yellow-deep: #f5b800;
  --ink: #172033;
  --muted: #647087;
  --line: #d9e4f3;
  --white: #ffffff;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f8fbff;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 74px;
  padding: 14px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid rgba(13, 99, 223, 0.12);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-size: 22px;
  font-weight: 900;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(13, 99, 223, 0.2);
}

.header-action,
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 8px;
  background: var(--blue);
  color: var(--white);
  font-weight: 850;
  line-height: 1.2;
  box-shadow: 0 14px 28px rgba(13, 99, 223, 0.24);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.header-action {
  padding: 0 20px;
  font-size: 15px;
}

.primary-button {
  min-width: 180px;
  padding: 0 28px;
  font-size: 17px;
}

.header-action:hover,
.primary-button:hover {
  transform: translateY(-1px);
  background: var(--blue-dark);
  box-shadow: 0 18px 34px rgba(13, 99, 223, 0.3);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: calc(100vh - 74px);
  padding: clamp(48px, 7vw, 88px) clamp(18px, 5vw, 72px) clamp(34px, 5vw, 58px);
  background:
    linear-gradient(90deg, rgba(13, 99, 223, 0.08), transparent 36%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.hero-copy {
  max-width: 620px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 900;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 6px;
  border-radius: 999px;
  background: var(--yellow);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-text {
  max-width: 560px;
  margin-bottom: 28px;
  color: #46556f;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-visual {
  position: relative;
  margin: 0;
  padding: clamp(10px, 1.4vw, 18px);
  border: 1px solid rgba(13, 99, 223, 0.18);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 212, 71, 0.9), rgba(13, 99, 223, 0.9)),
    var(--white);
  box-shadow: 0 28px 70px rgba(23, 32, 51, 0.16);
}

.hero-visual::after {
  content: "Verified coupon ready";
  position: absolute;
  right: clamp(16px, 2.2vw, 30px);
  bottom: clamp(16px, 2.2vw, 30px);
  max-width: 210px;
  padding: 14px 18px;
  border-radius: 8px;
  background: var(--white);
  color: var(--blue-dark);
  font-size: 15px;
  font-weight: 900;
  box-shadow: 0 18px 42px rgba(13, 99, 223, 0.22);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  object-fit: cover;
  object-position: center;
}

.proof-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 clamp(18px, 5vw, 72px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  transform: translateY(-18px);
}

.proof-item {
  min-height: 126px;
  padding: 24px;
  background: var(--white);
}

.proof-item strong {
  display: block;
  margin-bottom: 10px;
  color: var(--blue-dark);
  font-size: 20px;
}

.proof-item span {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.62;
}

.feature-section {
  padding: clamp(42px, 7vw, 88px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.14;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 238px;
  padding: 24px;
  border: 1px solid rgba(13, 99, 223, 0.14);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 42px rgba(23, 32, 51, 0.07);
}

.feature-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 34px;
  margin-bottom: 24px;
  border-radius: 8px;
  background: var(--yellow);
  color: #564100;
  font-weight: 900;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.28;
}

.feature-card p,
.privacy-strip p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.privacy-strip {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: 24px;
  align-items: center;
  padding: clamp(34px, 5vw, 58px) clamp(18px, 5vw, 72px);
  background: #0b2f78;
  color: var(--white);
}

.privacy-strip .eyebrow,
.privacy-strip h2,
.privacy-strip p {
  color: var(--white);
}

.privacy-strip p:last-child {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.82);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 26px clamp(18px, 5vw, 72px);
  color: #55647c;
  background: var(--white);
}

.site-footer span {
  font-weight: 900;
  color: var(--ink);
}

.site-footer a {
  color: var(--blue);
  font-weight: 850;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    max-width: 760px;
  }

  .proof-band,
  .feature-grid,
  .privacy-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 68px;
    padding: 12px 16px;
  }

  .brand span {
    font-size: 19px;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .header-action {
    min-height: 42px;
    padding: 0 14px;
    font-size: 13px;
  }

  .hero {
    padding: 34px 16px 28px;
  }

  h1 {
    font-size: 39px;
  }

  .primary-button {
    width: 100%;
  }

  .hero-visual::after {
    position: static;
    display: block;
    max-width: none;
    margin-top: 10px;
  }

  .proof-band {
    margin: 0 16px;
    transform: none;
  }

  .feature-section,
  .privacy-strip {
    padding-right: 16px;
    padding-left: 16px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 16px;
  }
}