:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(29, 29, 31, 0.1);
  --blue: #0071e3;
  --green: #2f8f64;
  --coral: #e75d45;
  --gold: #b9832d;
  --ink: #232323;
  --radius: 28px;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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;
  min-height: 64px;
  padding: 12px clamp(20px, 6vw, 76px);
  background: rgba(245, 245, 247, 0.82);
  border-bottom: 1px solid rgba(29, 29, 31, 0.08);
  backdrop-filter: saturate(180%) blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--text);
  color: #fff;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.15;
}

.brand strong {
  font-size: 15px;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 34px);
  color: rgba(29, 29, 31, 0.78);
  font-size: 14px;
}

.nav-links a {
  padding: 8px 0;
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.96fr);
  align-items: center;
  gap: clamp(34px, 5vw, 86px);
  min-height: calc(100svh - 120px);
  padding: clamp(38px, 6vw, 84px) clamp(20px, 6vw, 76px) clamp(30px, 5vw, 56px);
}

.hero-copy {
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(44px, 5.8vw, 72px);
  line-height: 1.04;
  font-weight: 760;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4.5vw, 64px);
  line-height: 1.08;
  font-weight: 740;
}

h3 {
  margin-bottom: 12px;
  font-size: 30px;
  line-height: 1.12;
}

.hero-lead,
.company-copy p,
.contact-section p {
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
}

.button.primary {
  background: var(--blue);
  color: #fff;
}

.button.secondary {
  background: rgba(29, 29, 31, 0.08);
}

.hero-visual {
  position: relative;
  min-height: 470px;
}

.device {
  overflow: hidden;
  width: min(330px, 88vw);
  min-height: 448px;
  margin-left: auto;
  padding: 18px;
  border: 10px solid #121214;
  border-radius: 46px;
  background: #fbfbfd;
  box-shadow: var(--shadow);
}

.device-top {
  width: 92px;
  height: 24px;
  margin: 0 auto 34px;
  border-radius: 0 0 16px 16px;
  background: #121214;
}

.app-preview {
  display: grid;
  grid-template-columns: 74px 1fr;
  align-items: center;
  gap: 18px;
  padding: 20px;
  border-radius: 26px;
  background: #eef4f0;
}

.app-preview img {
  width: 74px;
  height: 74px;
  border-radius: 22px;
  box-shadow: 0 12px 30px rgba(47, 143, 100, 0.18);
}

.app-preview span,
.app-preview strong {
  display: block;
}

.app-preview span {
  margin-bottom: 6px;
  color: var(--green);
  font-size: 14px;
  font-weight: 700;
}

.app-preview strong {
  font-size: 24px;
  line-height: 1.16;
}

.preview-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.preview-list span {
  display: flex;
  align-items: center;
  min-height: 64px;
  padding: 0 20px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid rgba(29, 29, 31, 0.08);
  color: rgba(29, 29, 31, 0.74);
  font-size: 18px;
  font-weight: 650;
}

.floating-panel {
  position: absolute;
  right: min(280px, 38vw);
  bottom: 14px;
  display: grid;
  gap: 6px;
  width: 184px;
  padding: 20px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 18px 52px rgba(0, 0, 0, 0.13);
  backdrop-filter: blur(16px);
}

.panel-number {
  color: var(--coral);
  font-size: 48px;
  line-height: 1;
  font-weight: 760;
}

.floating-panel span:last-child {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.35;
}

.section {
  padding: clamp(42px, 8vw, 96px) clamp(20px, 6vw, 76px);
}

.section-heading {
  max-width: 900px;
  margin-bottom: clamp(34px, 5vw, 58px);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.product-section {
  background: #fff;
  padding-top: 28px;
}

.product-card {
  min-height: 390px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfbfd;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.05);
}

.product-card p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.product-kicker {
  margin-bottom: 10px;
  font-weight: 700;
}

.product-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 82px;
  height: 82px;
  margin-bottom: 34px;
  border-radius: 24px;
  overflow: hidden;
}

.product-icon span {
  display: block;
}

.icon-bank {
  background: #e8f3ff;
}

.icon-bank span {
  width: 38px;
  height: 44px;
  border: 4px solid var(--blue);
  border-radius: 18px 18px 10px 10px;
}

.icon-bank::after {
  content: "";
  position: absolute;
  width: 36px;
  height: 4px;
  border-radius: 99px;
  background: var(--blue);
}

.icon-skip {
  background: #e8f5f2;
}

.icon-skip span {
  width: 42px;
  height: 18px;
  border-radius: 50%;
  background: var(--green);
  transform: rotate(-18deg);
}

.icon-skip::before,
.icon-skip::after {
  content: "";
  position: absolute;
  right: 18px;
  width: 28px;
  height: 3px;
  border-radius: 99px;
  background: rgba(47, 143, 100, 0.38);
}

.icon-skip::before {
  top: 52px;
}

.icon-skip::after {
  top: 60px;
  right: 26px;
}

.icon-story {
  background: #fff0eb;
}

.icon-story span {
  width: 42px;
  height: 48px;
  border-radius: 8px 16px 16px 8px;
  background: var(--coral);
}

.icon-story::after {
  content: "";
  position: absolute;
  left: 30px;
  top: 24px;
  width: 24px;
  height: 4px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 12px 0 rgba(255, 255, 255, 0.72);
}

.image-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-bank .product-kicker {
  color: var(--blue);
}

.product-skip .product-kicker {
  color: var(--green);
}

.product-story .product-kicker {
  color: var(--coral);
}

.product-life .product-kicker {
  color: var(--gold);
}

.company-section {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: clamp(34px, 6vw, 78px);
  align-items: start;
  background: #fff;
}

.company-copy {
  max-width: 820px;
}

.company-facts {
  margin: 0;
  display: grid;
  gap: 12px;
}

.company-facts div {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.company-facts dt {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

.company-facts dd {
  margin: 0;
  font-size: 20px;
  font-weight: 650;
  line-height: 1.35;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.74fr);
  gap: clamp(34px, 6vw, 80px);
  align-items: start;
}

.contact-list {
  display: grid;
  gap: 12px;
  padding-top: 8px;
}

.contact-list a,
.contact-list span {
  display: block;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  font-size: 18px;
  font-weight: 620;
}

.contact-list a {
  color: var(--blue);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 6vw, 76px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 1120px) {
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-card {
    min-height: 330px;
  }
}

@media (max-width: 860px) {
  .hero,
  .company-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
    padding-bottom: 28px;
  }

  .hero-visual {
    min-height: auto;
  }

  .device {
    display: none;
  }

  .floating-panel {
    position: static;
    width: min(100%, 360px);
    margin-top: 8px;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 58px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-lead,
  .company-copy p,
  .contact-section p {
    font-size: 18px;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-card {
    min-height: 0;
  }

  .device {
    min-height: 470px;
    border-radius: 38px;
  }

  .app-preview {
    grid-template-columns: 64px 1fr;
  }

  .app-preview img {
    width: 64px;
    height: 64px;
  }

  .app-preview strong {
    font-size: 21px;
  }

  .site-footer {
    flex-direction: column;
  }
}