:root {
  --bg: #f3f7fb;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --surface-muted: #eef4f9;
  --text: #06111f;
  --text-soft: #4b5c70;
  --line: rgba(15, 23, 42, 0.1);
  --line-strong: rgba(15, 23, 42, 0.16);
  --primary: #0f172a;
  --primary-soft: #1e293b;
  --accent: #0369a1;
  --accent-soft: rgba(3, 105, 161, 0.12);
  --shadow-lg: 0 30px 80px rgba(8, 15, 30, 0.12);
  --shadow-md: 0 18px 40px rgba(8, 15, 30, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: 1180px;
  --header-height: 84px;
  --font-sans: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(3, 105, 161, 0.12), transparent 28%),
    radial-gradient(circle at 85% 12%, rgba(37, 99, 235, 0.12), transparent 18%),
    linear-gradient(180deg, #f7fbff 0%, #eff5fa 48%, #f8fbfd 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 72%);
}

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

img,
svg {
  display: block;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  background: none;
  padding: 0;
}

.site-shell {
  position: relative;
  overflow: clip;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

.section {
  position: relative;
  padding: 108px 0;
}

.section-soft {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.5));
}

.section-accent {
  background:
    radial-gradient(circle at center, rgba(3, 105, 161, 0.12), transparent 60%),
    linear-gradient(180deg, #0f172a 0%, #111d32 100%);
  color: #f7fbff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 16px 0 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--header-height);
  padding: 16px 22px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 999px;
  background: rgba(248, 251, 255, 0.82);
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 36px rgba(8, 15, 30, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  filter: drop-shadow(0 10px 22px rgba(8, 15, 30, 0.16));
}

.brand-text {
  display: grid;
  gap: 4px;
}

.brand-text strong {
  font-size: 1rem;
  line-height: 1;
}

.brand-text small {
  color: var(--text-soft);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  position: relative;
  padding: 12px 16px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 0.95rem;
  transition:
    color 220ms ease,
    background-color 220ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--primary);
  background: rgba(15, 23, 42, 0.06);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  cursor: pointer;
}

.menu-toggle span {
  position: absolute;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--primary);
  transition: transform 220ms ease;
}

.menu-toggle span:first-child {
  transform: translateY(-4px);
}

.menu-toggle span:last-child {
  transform: translateY(4px);
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: rotate(-45deg);
}

.hero {
  padding-top: 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  align-items: center;
  gap: 36px;
}

.eyebrow,
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before,
.section-tag::before {
  content: "";
  width: 36px;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
}

.hero h1 {
  margin: 0;
  max-width: 11ch;
  font-size: clamp(2.8rem, 5.2vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-text,
.section-heading p,
.info-card p,
.feature-card p,
.scenario-card p,
.closing-panel p,
.hero-note p,
.site-footer p {
  color: var(--text-soft);
  line-height: 1.85;
}

.hero-text {
  max-width: 58ch;
  margin: 24px 0 0;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 32px 0 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition:
    transform 220ms ease,
    box-shadow 220ms ease,
    border-color 220ms ease,
    background-color 220ms ease;
  cursor: pointer;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #1d78b8 100%);
  color: #ffffff;
  box-shadow: 0 16px 32px rgba(3, 105, 161, 0.22);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: var(--primary);
}

.hero-points {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  position: relative;
  padding-left: 20px;
  color: var(--text-soft);
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(3, 105, 161, 0.12);
}

.hero-panel {
  position: relative;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.72));
  box-shadow: var(--shadow-lg);
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: auto -18% -22% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(3, 105, 161, 0.18), transparent 68%);
}

.panel-topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 22px;
  color: var(--text-soft);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-card,
.compliance-card,
.closing-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-md);
}

.hero-card {
  padding: 26px;
}

.hero-card-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.hero-card-header p,
.hero-note p,
.closing-title {
  margin: 0;
}

.hero-card-header p {
  color: var(--text-soft);
}

.hero-card-header strong {
  font-size: 1.18rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metric-grid article {
  padding: 18px;
  border-radius: 18px;
  background: var(--surface-muted);
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.metric-grid span {
  display: block;
  margin-bottom: 8px;
  color: var(--text-soft);
  font-size: 0.88rem;
}

.metric-grid strong {
  font-size: 1rem;
}

.hero-note {
  margin-top: 16px;
  padding: 18px 4px 2px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  max-width: 60ch;
}

.card-grid {
  display: grid;
  gap: 22px;
}

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

.info-card,
.feature-card,
.scenario-card {
  position: relative;
  overflow: hidden;
  min-height: 100%;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.info-card::before,
.scenario-card::before {
  content: "";
  position: absolute;
  inset: auto -20% -35% auto;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(3, 105, 161, 0.14), transparent 70%);
}

.icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 22px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(3, 105, 161, 0.14), rgba(3, 105, 161, 0.05));
  color: var(--accent);
}

.icon-wrap svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.info-card h3,
.feature-card h3,
.scenario-card h3 {
  margin: 0 0 12px;
  font-size: 1.22rem;
}

.info-card p,
.feature-card p,
.scenario-card p,
.compliance-grid dd,
.compliance-grid dt {
  margin: 0;
}

.platform-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: start;
}

.feature-stack {
  display: grid;
  gap: 16px;
}

.feature-card {
  display: grid;
  gap: 12px;
  padding: 24px 26px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.72)),
    linear-gradient(90deg, rgba(3, 105, 161, 0.05), transparent);
}

.feature-card > div {
  display: flex;
  align-items: center;
  gap: 16px;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.section-accent .section-tag,
.section-accent .section-heading p,
.section-accent .scenario-card p {
  color: rgba(244, 248, 255, 0.76);
}

.section-accent .section-tag::before {
  opacity: 0.35;
}

.section-accent .scenario-card {
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.05));
  box-shadow: none;
}

.section-accent .scenario-card::before {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.16), transparent 70%);
}

.compliance-wrap {
  display: grid;
  gap: 28px;
}

.overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 22px;
}

.compliance-card {
  padding: 30px;
}

.overview-text {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.9;
}

.overview-text + .overview-text {
  margin-top: 14px;
}

.compliance-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
  margin: 0;
}

.compliance-grid div {
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.compliance-grid dt {
  margin-bottom: 10px;
  color: var(--text-soft);
}

.compliance-grid dd {
  font-size: 1.08rem;
  font-weight: 600;
  word-break: break-word;
}

.compliance-grid a {
  color: #7dd3fc;
}

.compliance-grid a:hover,
.compliance-grid a:focus-visible,
.footer-meta a:hover,
.footer-meta a:focus-visible {
  text-decoration: underline;
}

.closing-panel {
  padding: 24px 28px;
  background:
    linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(24, 37, 60, 0.94)),
    linear-gradient(90deg, rgba(3, 105, 161, 0.18), transparent);
  color: #f5f9ff;
}

.closing-title {
  margin-bottom: 10px;
  color: rgba(245, 249, 255, 0.72);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.closing-panel p:last-child {
  color: rgba(245, 249, 255, 0.82);
}

.site-footer {
  padding: 24px 0 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 26px;
  border: 1px solid rgba(255, 255, 255, 0.66);
  border-radius: 28px;
  background: rgba(248, 251, 255, 0.78);
  box-shadow: 0 18px 36px rgba(8, 15, 30, 0.06);
}

.footer-inner strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.02rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  width: 50px;
  height: 50px;
  flex: 0 0 auto;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 20px;
  color: var(--text-soft);
}

.footer-meta a {
  color: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.reveal-delay {
  transition-delay: 120ms;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

:focus-visible {
  outline: 2px solid rgba(3, 105, 161, 0.45);
  outline-offset: 3px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .platform-grid,
  .overview-grid {
    grid-template-columns: 1fr;
  }

  .card-grid-3,
  .scenario-grid,
  .compliance-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 76px;
  }

  .section {
    padding: 88px 0;
  }

  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .header-inner {
    position: relative;
    padding: 14px 16px;
    border-radius: 26px;
  }

  .menu-toggle {
    position: relative;
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    display: grid;
    gap: 6px;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.65);
    border-radius: 24px;
    background: rgba(248, 251, 255, 0.95);
    backdrop-filter: blur(18px);
    box-shadow: 0 18px 40px rgba(8, 15, 30, 0.1);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition:
      opacity 220ms ease,
      transform 220ms ease,
      visibility 220ms ease;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    width: 100%;
    padding: 14px 16px;
  }

  .hero {
    padding-top: 44px;
  }

  .hero h1 {
    max-width: none;
  }

  .card-grid-3,
  .scenario-grid,
  .compliance-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-meta {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .brand-text small {
    display: none;
  }

  .brand-mark {
    width: 46px;
    height: 46px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-panel,
  .hero-card,
  .info-card,
  .feature-card,
  .scenario-card,
  .compliance-card,
  .closing-panel,
  .footer-inner {
    border-radius: 22px;
  }

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

  .feature-card > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .footer-brand {
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}