:root {
  --ink: #143f3c;
  --ink-2: #244f4b;
  --paper: #f7f5ef;
  --surface: #fffdf8;
  --muted: #66716d;
  --line: #dad7ce;
  --teal: #1fa187;
  --gold: #d8a23a;
  --coral: #c85b45;
  --blue: #496a7d;
  --shadow: 0 24px 80px rgba(20, 63, 60, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(90deg, rgba(20, 63, 60, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(20, 63, 60, 0.04) 1px, transparent 1px);
  background-size: 72px 72px;
}

body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.36;
  background-image: radial-gradient(rgba(20, 63, 60, 0.18) 0.8px, transparent 0.8px);
  background-size: 8px 8px;
  mix-blend-mode: multiply;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 clamp(20px, 4vw, 56px);
  background: rgba(247, 245, 239, 0.82);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header[data-elevated="true"] {
  border-bottom-color: rgba(20, 63, 60, 0.12);
  background: rgba(247, 245, 239, 0.94);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 152px;
}

.brand img {
  width: 38px;
  height: 38px;
}

.brand strong {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1;
}

.brand small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0;
}

.brand.compact {
  min-width: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover {
  color: var(--ink);
}

.header-actions,
.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.text-link {
  color: var(--muted);
  font-size: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--ink);
  box-shadow: 0 12px 30px rgba(20, 63, 60, 0.2);
}

.button-primary:hover {
  background: #0f302e;
  box-shadow: 0 18px 40px rgba(20, 63, 60, 0.26);
}

.button-secondary {
  color: var(--ink);
  border-color: rgba(20, 63, 60, 0.2);
  background: rgba(255, 253, 248, 0.72);
}

.menu-button {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  align-items: end;
  min-height: 92vh;
  padding: 144px clamp(20px, 5vw, 72px) 76px;
  overflow: hidden;
  border-bottom: 1px solid rgba(20, 63, 60, 0.12);
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero-backdrop::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(247, 245, 239, 0.98) 0%, rgba(247, 245, 239, 0.82) 42%, rgba(247, 245, 239, 0.38) 100%),
    linear-gradient(0deg, rgba(247, 245, 239, 1) 0%, rgba(247, 245, 239, 0.18) 32%, rgba(247, 245, 239, 0) 100%);
}

.hero-backdrop img {
  position: absolute;
  right: -120px;
  top: 88px;
  width: min(980px, 76vw);
  opacity: 0.82;
  filter: drop-shadow(0 36px 80px rgba(20, 63, 60, 0.2));
  transform: rotate(-2deg);
}

.hero-content {
  max-width: 760px;
  padding-bottom: 18px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1,
h2 {
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(56px, 9vw, 120px);
  line-height: 0.92;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 5vw, 68px);
  line-height: 1;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.2;
}

.hero-copy {
  max-width: 670px;
  margin-bottom: 30px;
  color: var(--ink-2);
  font-size: clamp(17px, 2vw, 22px);
}

.hero-panel {
  width: 100%;
  padding: 22px;
  border: 1px solid rgba(20, 63, 60, 0.16);
  border-radius: 16px;
  background: rgba(255, 253, 248, 0.86);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 13px;
}

.panel-header strong {
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--teal);
  background: rgba(31, 161, 135, 0.13);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.metric-row div {
  min-width: 0;
  padding: 14px 12px;
  border-radius: 12px;
  background: rgba(247, 245, 239, 0.86);
}

.metric-row small {
  display: block;
  color: var(--muted);
  font-size: 11px;
}

.metric-row strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
}

.signal-list {
  display: grid;
  gap: 10px;
}

.signal-list p {
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid rgba(20, 63, 60, 0.12);
  color: var(--muted);
  font-size: 13px;
}

.signal-list b {
  color: var(--ink);
}

.ticker {
  display: flex;
  gap: 14px;
  padding: 18px clamp(20px, 5vw, 72px);
  overflow-x: auto;
  border-bottom: 1px solid rgba(20, 63, 60, 0.12);
  background: var(--ink);
}

.ticker span {
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid rgba(246, 242, 234, 0.18);
  border-radius: 999px;
  color: #f6f2ea;
  font-size: 13px;
}

.section {
  padding: 104px clamp(20px, 5vw, 72px);
}

.section-tight {
  padding-top: 86px;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 44px;
}

.section-heading p:not(.eyebrow) {
  max-width: 780px;
  color: var(--muted);
  font-size: 18px;
}

.connector-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.connector,
.capability-stack article,
.scenario,
.trust-grid article {
  border: 1px solid rgba(20, 63, 60, 0.14);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.82);
  box-shadow: 0 14px 50px rgba(20, 63, 60, 0.06);
}

.connector {
  min-height: 250px;
  padding: 24px;
}

.connector-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  border-radius: 10px;
  color: #fff;
  font-weight: 900;
}

.connector-icon.ad-channel {
  background: var(--blue);
}

.connector-icon.attribution {
  background: var(--ink);
}

.connector-icon.commerce {
  background: var(--gold);
}

.connector-icon.creative {
  background: var(--teal);
}

.connector p,
.scenario p,
.trust-grid p,
.capability-stack p,
.timeline p,
.cta-section p {
  color: var(--muted);
}

.connector small {
  display: inline-block;
  margin-top: 14px;
  color: var(--coral);
  font-weight: 800;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(40px, 7vw, 96px);
  align-items: start;
  background: #ece8dd;
}

.sticky-copy {
  position: sticky;
  top: 112px;
}

.capability-stack {
  display: grid;
  gap: 14px;
}

.capability-stack article {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 20px;
  padding: 28px;
}

.capability-stack span {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 38px;
  line-height: 1;
}

.capability-stack h3,
.capability-stack p {
  grid-column: 2;
}

.product-band {
  padding: 88px clamp(20px, 5vw, 72px);
  background: var(--ink);
  color: #f6f2ea;
}

.product-band .eyebrow {
  color: var(--gold);
}

.product-band h2 {
  max-width: 860px;
}

.product-band img {
  width: 100%;
  margin-top: 34px;
  border-radius: 24px;
  box-shadow: 0 34px 110px rgba(0, 0, 0, 0.32);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.scenario {
  min-height: 410px;
  padding: clamp(28px, 5vw, 52px);
  overflow: hidden;
}

.scenario h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 4vw, 48px);
}

.scenario ul {
  display: grid;
  gap: 12px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.scenario li {
  padding-left: 24px;
  position: relative;
}

.scenario li::before {
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--teal);
  content: "";
}

.commerce-scenario li::before {
  background: var(--gold);
}

.rollout {
  background: #fbfaf6;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(20, 63, 60, 0.18);
}

.timeline li {
  min-height: 260px;
  padding: 28px 24px;
  border-right: 1px solid rgba(20, 63, 60, 0.18);
}

.timeline li:last-child {
  border-right: 0;
}

.timeline time {
  display: block;
  margin-bottom: 50px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
}

.trust-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: 42px;
  padding: 92px clamp(20px, 5vw, 72px);
  background: #ebe2d6;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.trust-grid article {
  padding: 24px;
  background: rgba(255, 253, 248, 0.72);
}

.cta-section {
  padding: 120px clamp(20px, 5vw, 72px);
  text-align: center;
}

.cta-section h2 {
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section p {
  max-width: 760px;
  margin: 0 auto 28px;
  font-size: 18px;
}

.cta-section .hero-actions {
  justify-content: center;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid rgba(20, 63, 60, 0.12);
  color: var(--muted);
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: rise 700ms ease forwards;
}

.hero-panel.reveal {
  animation-delay: 160ms;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1040px) {
  .site-nav,
  .header-actions {
    display: none;
  }

  .menu-button {
    display: inline-flex;
    width: 42px;
    height: 42px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1px solid rgba(20, 63, 60, 0.18);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.7);
  }

  .menu-button span {
    width: 18px;
    height: 2px;
    background: var(--ink);
  }

  .site-header.menu-open .site-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: grid;
    gap: 0;
    padding: 12px;
    border: 1px solid rgba(20, 63, 60, 0.14);
    border-radius: 12px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .site-header.menu-open .site-nav a {
    padding: 14px;
  }

  .hero {
    grid-template-columns: 1fr;
    align-items: start;
    min-height: auto;
    padding-top: 124px;
  }

  .hero-backdrop img {
    right: -280px;
    width: 900px;
  }

  .hero-panel {
    max-width: 520px;
    margin-top: 48px;
  }

  .connector-grid,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-section,
  .trust-section {
    grid-template-columns: 1fr;
  }

  .sticky-copy {
    position: static;
  }

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

@media (max-width: 700px) {
  .site-header {
    height: 64px;
    padding: 0 16px;
  }

  .hero {
    padding: 108px 18px 52px;
  }

  h1 {
    font-size: clamp(52px, 18vw, 72px);
  }

  .hero-actions,
  .cta-section .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .metric-row,
  .connector-grid,
  .scenario-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .timeline li {
    border-right: 0;
    border-bottom: 1px solid rgba(20, 63, 60, 0.18);
  }

  .timeline li:last-child {
    border-bottom: 0;
  }

  .capability-stack article {
    grid-template-columns: 1fr;
  }

  .capability-stack h3,
  .capability-stack p {
    grid-column: auto;
  }

  .section,
  .product-band,
  .trust-section,
  .cta-section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}