:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #64717f;
  --line: rgba(28, 42, 55, 0.12);
  --paper: #fbfaf7;
  --white: #ffffff;
  --green: #1f8a62;
  --green-dark: #0f684c;
  --orange: #f06b2f;
  --gold: #d9a441;
  --blue: #315f86;
  --shadow: 0 24px 70px rgba(26, 36, 45, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  padding: 0 clamp(20px, 5vw, 64px);
  background: rgba(251, 250, 247, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(18px);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  font-weight: 800;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--green), var(--orange));
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.1;
}

.brand small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #314251;
  font-size: 14px;
  font-weight: 600;
}

.header-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 8px;
}

.header-cta,
.primary-button {
  color: #fff;
  background: var(--ink);
}

.secondary-button {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(23, 33, 43, 0.14);
}

.hero-section {
  position: relative;
  min-height: 96vh;
  padding: 150px clamp(20px, 6vw, 84px) 70px;
  overflow: hidden;
  background: #1a261f;
}

.hero-media {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1.25fr 0.85fr 0.85fr;
  gap: 8px;
  opacity: 0.5;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(12, 28, 22, 0.96) 0%, rgba(12, 28, 22, 0.78) 38%, rgba(12, 28, 22, 0.32) 100%),
    linear-gradient(180deg, rgba(12, 28, 22, 0.3) 0%, rgba(12, 28, 22, 0.78) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-content .eyebrow {
  color: #ffb27e;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(56px, 11vw, 124px);
  line-height: 0.92;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 760px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.78;
  font-weight: 500;
}

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

.hero-actions .primary-button {
  background: var(--orange);
}

.hero-panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 760px;
  margin-top: 72px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(14px);
}

.hero-panel div {
  min-height: 104px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel span {
  display: block;
  margin-bottom: 8px;
  color: #fff;
  font-size: 28px;
  font-weight: 800;
}

.hero-panel p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
}

section:not(.hero-section) {
  padding: 92px clamp(20px, 6vw, 84px);
}

.intro-section {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  gap: 56px;
  align-items: start;
  background: #fff;
}

.section-heading h2,
.app-copy h2,
.ai-copy h2,
.platform-copy h2 {
  margin-bottom: 0;
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.intro-text {
  margin: 0;
  color: #3d4c59;
  font-size: 21px;
  line-height: 1.9;
}

.apps-section {
  display: grid;
  gap: 28px;
  background: #f4f1eb;
}

.app-feature {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  gap: 28px;
  align-items: stretch;
}

.app-copy,
.feature-card,
.chat-window,
.download-card {
  border: 1px solid rgba(28, 42, 55, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 60px rgba(31, 42, 53, 0.08);
}

.app-copy {
  padding: clamp(26px, 4vw, 42px);
}

.app-copy p {
  margin: 24px 0 0;
  color: #41505d;
  font-size: 17px;
  line-height: 1.9;
}

.app-title-row {
  display: flex;
  align-items: center;
  gap: 18px;
}

.app-title-row img {
  width: 76px;
  height: 76px;
  border-radius: 18px;
  box-shadow: 0 16px 36px rgba(24, 37, 48, 0.18);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 210px;
  padding: 26px;
}

.feature-card span {
  display: block;
  margin-bottom: 28px;
  color: var(--green);
  font-weight: 800;
}

.buyer-feature .feature-card span {
  color: var(--orange);
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.78;
}

.ai-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 0.72fr);
  gap: 48px;
  align-items: center;
  background: #12221d;
  color: #fff;
}

.ai-copy p:last-child,
.platform-copy p {
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
  line-height: 1.86;
}

.chat-window {
  padding: 22px;
  background: #f7f8f6;
  color: var(--ink);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-weight: 800;
}

.chat-header img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.message {
  width: fit-content;
  max-width: 86%;
  margin: 12px 0;
  padding: 14px 16px;
  border-radius: 8px;
  line-height: 1.65;
}

.ai-message {
  background: #fff;
  border: 1px solid var(--line);
}

.user-message {
  margin-left: auto;
  color: #fff;
  background: var(--green);
}

.workflow-section {
  background: #fff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 46px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.timeline-item {
  min-height: 250px;
  padding: 30px;
  background: #fff;
}

.timeline-item strong {
  display: block;
  margin-bottom: 78px;
  font-size: 22px;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.82;
}

.platform-section {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(300px, 1fr);
  gap: 54px;
  align-items: center;
  background: #203245;
  color: #fff;
}

.console-board {
  display: grid;
  gap: 12px;
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.console-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.console-row span {
  display: grid;
  place-items: center;
  min-height: 92px;
  padding: 14px;
  text-align: center;
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  font-weight: 700;
}

.download-section {
  background: #f4f1eb;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 42px;
}

.download-card {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 22px;
  align-items: center;
  padding: 28px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.download-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.download-card img {
  width: 96px;
  height: 96px;
  border-radius: 22px;
}

.download-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 24px;
}

.download-card p {
  margin-bottom: 16px;
  color: var(--muted);
  line-height: 1.76;
}

.download-card span {
  color: var(--green-dark);
  font-weight: 800;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 34px clamp(20px, 6vw, 84px);
  color: rgba(255, 255, 255, 0.72);
  background: #111a20;
}

.site-footer strong {
  display: block;
  color: #fff;
  font-size: 20px;
}

.site-footer p {
  margin: 6px 0 0;
}

.site-footer > p {
  justify-self: end;
  text-align: right;
}

.icp-link {
  justify-self: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  font-weight: 600;
}

.icp-link:hover {
  color: #fff;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .intro-section,
  .app-feature,
  .ai-section,
  .platform-section {
    grid-template-columns: 1fr;
  }

  .timeline,
  .download-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    height: 68px;
    padding-inline: 16px;
  }

  .brand small,
  .header-cta {
    display: none;
  }

  .hero-section {
    min-height: 92vh;
    padding: 116px 18px 42px;
  }

  .hero-media {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .intro-text {
    font-size: 17px;
  }

  .hero-panel,
  .feature-grid,
  .console-row {
    grid-template-columns: 1fr;
  }

  section:not(.hero-section) {
    padding: 62px 18px;
  }

  .app-title-row,
  .download-card {
    grid-template-columns: 1fr;
  }

  .app-title-row {
    align-items: flex-start;
  }

  .timeline-item {
    min-height: auto;
  }

  .timeline-item strong {
    margin-bottom: 24px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .site-footer > p {
    justify-self: center;
    text-align: center;
  }
}