:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --line: rgba(15, 23, 42, 0.1);
  --text: #0f172a;
  --muted: #475569;
  --deep: #08111f;
  --accent: #67e8f9;
  --shadow: 0 30px 80px -40px rgba(15, 23, 42, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(103, 232, 249, 0.18), transparent 24%),
    radial-gradient(circle at top right, rgba(148, 163, 184, 0.16), transparent 22%),
    linear-gradient(180deg, #f8fbff 0%, #eff4fa 100%);
  color: var(--text);
}

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

.landing-page {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 96px;
}

.topbar {
  position: sticky;
  top: 12px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
  box-shadow: 0 20px 50px -42px rgba(15, 23, 42, 0.4);
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, #0f172a 0%, #1d4ed8 100%);
  color: white;
  font-weight: 700;
}

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

.brand p {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: #334155;
  font-size: 14px;
}

.hero {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: 24px;
  padding: 28px;
  border-radius: 36px;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.28), transparent 28%),
    linear-gradient(135deg, #08111f 0%, #0f172a 55%, #14233f 100%);
  color: white;
  box-shadow: 0 40px 120px -48px rgba(2, 12, 27, 0.9);
}

.hero-copy h1,
.section-header h2,
.cta-copy h2 {
  margin: 0;
  letter-spacing: -0.03em;
}

.hero-badge,
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-badge {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: #cffafe;
}

.hero-copy h1 {
  margin-top: 18px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 0.98;
}

.hero-copy p {
  margin: 22px 0 0;
  max-width: 680px;
  color: rgba(226, 232, 240, 0.92);
  line-height: 1.95;
  font-size: 17px;
}

.hero-actions,
.chip-row,
.stats-row,
.card-grid,
.workflow-grid,
.faq-list,
.source-list {
  display: grid;
  gap: 16px;
}

.hero-actions {
  margin-top: 30px;
  grid-template-columns: repeat(2, max-content);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform 180ms ease, opacity 180ms ease, background-color 180ms ease;
  font-size: 15px;
  font-weight: 600;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #082f49;
  box-shadow: 0 16px 44px -24px rgba(103, 232, 249, 0.8);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.chip-row {
  margin-top: 24px;
  grid-template-columns: repeat(auto-fit, minmax(120px, max-content));
}

.chip {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 12px;
}

.hero .chip {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(226, 232, 240, 0.94);
}

.chip-light {
  background: #e2e8f0;
  color: #334155;
}

.chip-dark {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(226, 232, 240, 0.94);
}

.hero-panel,
.hero-side-grid {
  display: grid;
  gap: 14px;
}

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

.panel-card,
.info-card,
.scenario-card,
.workflow-card,
.faq-card,
.cta-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.panel-card {
  padding: 22px;
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.panel-dark {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
}

.panel-accent {
  background: var(--accent);
  color: #082f49;
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.panel-title span {
  font-size: 15px;
  font-weight: 700;
}

.panel-title em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.72;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.mini-tile,
.source-item {
  padding: 14px;
  border-radius: 18px;
}

.mini-tile {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(241, 245, 249, 0.96);
  font-size: 14px;
}

.signal-list {
  margin: 16px 0 0;
  padding-left: 18px;
  color: rgba(226, 232, 240, 0.92);
}

.signal-list li + li {
  margin-top: 10px;
}

.panel-accent p {
  margin: 16px 0 0;
  line-height: 1.85;
}

.stats-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.stat-card span {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(207, 250, 254, 0.82);
}

.stat-card p {
  margin: 10px 0 0;
  line-height: 1.75;
  font-size: 14px;
}

.content-section {
  padding: 88px 0 0;
}

.section-header {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.section-eyebrow {
  background: #dffbff;
  color: #0f766e;
}

.section-header h2 {
  margin-top: 14px;
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.08;
}

.section-header p:last-child {
  margin: 18px 0 0;
  line-height: 1.9;
  color: var(--muted);
  font-size: 17px;
}

.card-grid.three {
  margin-top: 28px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.workflow-card,
.faq-card,
.scenario-card {
  padding: 28px;
  line-height: 1.9;
  color: #334155;
}

.info-card h3,
.scenario-top h3,
.workflow-card h3,
.faq-card h3 {
  margin: 0;
  font-size: 22px;
  color: var(--text);
  line-height: 1.22;
}

.info-card p,
.scenario-top p,
.workflow-card p,
.faq-card p {
  margin: 12px 0 0;
}

.info-card-dark,
.scenario-card-dark {
  background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
  color: rgba(226, 232, 240, 0.92);
}

.info-card-dark h3,
.scenario-card-dark h3 {
  color: white;
}

.scenario-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.scenario-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.scenario-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 18px;
  background: var(--deep);
  color: white;
  font-size: 13px;
  font-weight: 700;
}

.scenario-card-dark .scenario-icon {
  background: var(--accent);
  color: #082f49;
}

.source-list {
  margin-top: 16px;
}

.source-item {
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(248, 250, 252, 0.92);
  color: #475569;
}

.scenario-card-dark .source-item {
  border-color: rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(226, 232, 240, 0.9);
}

.workflow-grid {
  margin-top: 30px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.workflow-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 12px;
  border-radius: 999px;
  background: #cffafe;
  color: #155e75;
  font-size: 12px;
  font-weight: 700;
}

.faq-list {
  margin-top: 30px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cta-section {
  padding-bottom: 20px;
}

.cta-card {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 28px;
  padding: 30px;
  background:
    radial-gradient(circle at top left, rgba(103, 232, 249, 0.18), transparent 24%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(241, 245, 249, 0.94));
}

.cta-copy p:last-child {
  margin-top: 16px;
  line-height: 1.9;
  color: var(--muted);
}

.cta-form {
  display: grid;
  gap: 14px;
}

.cta-form label {
  display: grid;
  gap: 8px;
}

.cta-form span {
  font-size: 14px;
  font-weight: 600;
}

.cta-form input {
  width: 100%;
  min-height: 54px;
  padding: 0 16px;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  font-size: 15px;
}

.button-full {
  width: 100%;
  margin-top: 8px;
}

@media (max-width: 1080px) {
  .hero,
  .cta-card,
  .workflow-grid,
  .card-grid.three,
  .scenario-layout,
  .faq-list,
  .hero-side-grid,
  .stats-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .landing-page {
    width: min(100% - 20px, 100%);
    padding-top: 14px;
  }

  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar nav {
    gap: 12px;
  }

  .hero {
    padding: 22px;
    border-radius: 28px;
  }

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

  .button {
    width: 100%;
  }

  .content-section {
    padding-top: 72px;
  }
}