:root {
  --bg: #eef3f9;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --surface-alt: #f7fbff;
  --text: #10243f;
  --text-muted: #58708e;
  --line: rgba(16, 36, 63, 0.1);
  --brand: #0f6cda;
  --brand-deep: #0d4ea6;
  --accent: #1fc2b4;
  --shadow: 0 24px 80px rgba(24, 58, 101, 0.14);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 194, 180, 0.14), transparent 28%),
    radial-gradient(circle at 85% 8%, rgba(15, 108, 218, 0.16), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 44%, #f4f8fc 100%);
  line-height: 1.6;
}

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

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

.page-shell {
  position: relative;
  overflow: hidden;
}

.page-shell::before,
.page-shell::after {
  content: "";
  position: fixed;
  inset: auto auto 10% -6%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 194, 180, 0.18), transparent 70%);
  filter: blur(10px);
  pointer-events: none;
}

.page-shell::after {
  inset: 6% -8% auto auto;
  background: radial-gradient(circle, rgba(15, 108, 218, 0.18), transparent 68%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 2px 0;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(16, 36, 63, 0.06);
}

.header-inner,
.footer-inner,
.hero-grid,
.section-grid,
.trust-strip-inner,
.advantage-layout,
.cta-panel {
  display: grid;
  gap: 24px;
}

.header-inner {
  grid-template-columns: auto 1fr auto;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 64px;
  height: 64px;
  flex: 0 0 auto;
  border-radius: 12px;
  object-fit: contain;
  transform: scale(2.25);
  transform-origin: left center;
  margin-right: 74px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.brand-copy strong {
  color: var(--text);
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.3;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease;
}

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

.button-small {
  min-height: 42px;
  padding: 0 18px;
  font-size: 0.95rem;
}

.button-header {
  padding-inline: 14px;
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  box-shadow: 0 18px 34px rgba(15, 108, 218, 0.22);
}

.button-secondary {
  color: var(--brand-deep);
  border-color: rgba(15, 108, 218, 0.16);
  background: rgba(255, 255, 255, 0.78);
}

.button-ghost {
  border-color: rgba(16, 36, 63, 0.1);
  background: rgba(255, 255, 255, 0.58);
}

.hero {
  padding: 72px 0 44px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
}

.eyebrow,
.section-kicker,
.panel-label,
.highlight-label {
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
}

.hero h1,
.section-heading h2,
.cta-panel h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Songti SC", serif;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 3.35rem);
  max-width: 11ch;
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero-text {
  max-width: 60ch;
  margin: 26px 0 0;
  font-size: 1.08rem;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 40px 0 0;
}

.hero-metrics div {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 20px 40px rgba(31, 55, 92, 0.06);
}

.hero-metrics dt {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-metrics dd {
  margin: 6px 0 0;
  font-size: 1rem;
  font-weight: 700;
}

.hero-panel {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(160deg, rgba(12, 41, 76, 0.94), rgba(16, 79, 156, 0.92)),
    linear-gradient(135deg, rgba(31, 194, 180, 0.18), transparent);
  color: #fff;
  box-shadow: var(--shadow);
  isolation: isolate;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: calc(var(--radius-xl) - 8px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  opacity: 0.85;
  pointer-events: none;
}

.hero-panel-card {
  position: relative;
  padding: 22px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
}

.hero-panel-card + .hero-panel-card {
  margin-top: 16px;
}

.hero-panel-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.4rem;
}

.hero-panel-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
}

.hero-panel-card-primary {
  background: linear-gradient(135deg, rgba(31, 194, 180, 0.2), rgba(255, 255, 255, 0.1));
}

.hero-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.diagram-node {
  padding: 18px 16px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
}

.diagram-node span {
  display: block;
  margin-bottom: 6px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.18em;
}

.diagram-node strong {
  font-size: 0.98rem;
  line-height: 1.35;
}

.diagram-node-accent {
  background: rgba(31, 194, 180, 0.18);
}

.diagram-line {
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.58));
}

.trust-strip {
  padding: 12px 0 0;
}

.trust-strip-inner {
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.trust-strip p {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.trust-strip ul,
.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.trust-strip ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.trust-strip li,
.check-list li {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(15, 108, 218, 0.08);
  color: var(--brand-deep);
  font-weight: 700;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0.14)),
    linear-gradient(180deg, rgba(15, 108, 218, 0.03), rgba(31, 194, 180, 0.02));
  border-block: 1px solid rgba(255, 255, 255, 0.7);
}

.section-grid {
  grid-template-columns: minmax(340px, 1fr) minmax(0, 1.15fr);
  align-items: start;
}

.section-heading h2,
.cta-panel h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.95rem);
  max-width: 22ch;
}

.section-heading-wide h2 {
  max-width: 24ch;
}

.section-body p,
.highlight-panel p,
.workflow-step p,
.scenario-card p,
.faq-list p,
.cta-panel p {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.02rem;
}

.section-body p + p {
  margin-top: 18px;
}

#overview .section-body {
  padding-top: 28px;
}

.cards {
  display: grid;
  gap: 22px;
  margin-top: 32px;
}

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

.card,
.workflow-step,
.scenario-card,
.highlight-panel,
.faq-list details,
.cta-panel,
.scenario-card,
.trust-strip-inner {
  box-shadow: 0 20px 50px rgba(28, 54, 90, 0.06);
}

.card,
.workflow-step,
.scenario-card,
.faq-list details {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.9);
}

.card h3,
.advantage-item h3,
.workflow-step h3,
.scenario-card h3,
.highlight-panel h3 {
  margin: 0 0 12px;
  font-size: 1.28rem;
  line-height: 1.25;
}

.card p,
.card p,
.advantage-item p {
  margin: 0;
  color: var(--text-muted);
}

.icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(15, 108, 218, 0.14), rgba(31, 194, 180, 0.14));
}

.icon-chip span {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 5px solid var(--brand);
  border-right-color: transparent;
  transform: rotate(40deg);
}

.advantage-layout {
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.75fr);
  align-items: start;
  margin-top: 30px;
}

.advantage-list {
  display: grid;
  gap: 18px;
}

.advantage-item {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 18px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.85);
}

.advantage-index {
  display: inline-grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(15, 108, 218, 0.16), rgba(31, 194, 180, 0.16));
  color: var(--brand-deep);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.highlight-panel {
  padding: 30px;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, #0f2646 0%, #0f4b89 100%);
  color: #fff;
}

.highlight-panel h3,
.highlight-panel p,
.highlight-panel li {
  color: #fff;
}

.check-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.check-list li {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.workflow-grid,
.scenario-grid {
  display: grid;
  gap: 22px;
  margin-top: 30px;
}

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

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 36px;
  margin-bottom: 18px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(15, 108, 218, 0.08);
  color: var(--brand);
  font-weight: 800;
}

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

.faq-list {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.faq-list summary {
  cursor: pointer;
  font-size: 1.08rem;
  font-weight: 700;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list details summary::after {
  content: "+";
  float: right;
  color: var(--brand);
  font-size: 1.5rem;
  line-height: 1;
}

.faq-list details[open] summary::after {
  content: "-";
}

.faq-list details p {
  margin-top: 14px;
  max-width: 72ch;
}

.cta-section {
  padding-top: 0;
}

.cta-panel {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
  align-items: center;
  padding: 42px;
  border-radius: 36px;
  background:
    radial-gradient(circle at top right, rgba(31, 194, 180, 0.18), transparent 28%),
    linear-gradient(135deg, #ffffff 0%, #eef7ff 100%);
  border: 1px solid rgba(255, 255, 255, 0.94);
}

.cta-actions {
  display: grid;
  gap: 14px;
  justify-items: start;
}

.cta-note {
  max-width: 38ch;
}

.site-footer {
  padding: 0 0 34px;
}

.footer-inner {
  grid-template-columns: 1fr;
  align-items: center;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.92rem;
}

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

  .hero-grid,
  .section-grid,
  .advantage-layout,
  .workflow-grid,
  .cta-panel,
  .trust-strip-inner {
    grid-template-columns: 1fr;
  }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .cards-three,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    order: 0;
  }

  .trust-strip ul {
    justify-content: flex-start;
  }
}

@media (max-width: 1320px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-panel {
    max-width: 820px;
  }

  .hero h1 {
    max-width: 100%;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .site-header {
    padding: 2px 0;
  }

  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
  }

  .brand {
    justify-content: flex-start;
    min-width: 0;
    flex: 1 1 auto;
    gap: 8px;
  }

  .brand-mark {
    width: 52px;
    height: 52px;
    transform: scale(1.9);
    margin-right: 28px;
  }

  .brand-copy strong {
    font-size: 0.82rem;
  }

  .button-header {
    width: auto;
    flex: 0 0 auto;
    min-height: 36px;
    padding-inline: 11px;
    font-size: 0.85rem;
  }

  .hero {
    padding-top: 34px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(1.9rem, 8vw, 2.8rem);
  }

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

  .hero-panel,
  .card,
  .workflow-step,
  .scenario-card,
  .faq-list details,
  .cta-panel,
  .advantage-item {
    padding: 22px;
  }

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

  .diagram-line {
    width: 1px;
    height: 18px;
    margin: 0 auto;
  }

  .advantage-item {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}