:root {
  --hub-ink: #142033;
  --hub-ink-soft: #56657a;
  --hub-blue: #0b62c6;
  --hub-blue-deep: #094994;
  --hub-coral: #e75041;
  --hub-surface: #ffffff;
  --hub-ground: #f3f6fa;
  --hub-border: #d8e0ea;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.hub-page {
  min-width: 320px;
  margin: 0;
  background: var(--hub-ground);
  color: var(--hub-ink);
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.55;
}

.hub-shell {
  width: min(100% - 48px, 1240px);
  margin: 0 auto;
}

.hub-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgba(216, 224, 234, 0.92);
  background: rgba(255, 255, 255, 0.96);
}

.hub-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 24px;
}

.hub-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.hub-brand img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.hub-brand span {
  display: grid;
  gap: 0;
  line-height: 1.15;
}

.hub-brand strong {
  color: var(--hub-blue-deep);
  font-size: 18px;
}

.hub-brand small {
  color: var(--hub-ink-soft);
  font-size: 12px;
}

.hub-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.hub-nav a {
  color: var(--hub-ink-soft);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

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

.hub-hero {
  overflow: hidden;
  border-bottom: 1px solid var(--hub-border);
  background: var(--hub-surface);
}

.hub-hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.84fr);
  gap: clamp(40px, 7vw, 104px);
  align-items: center;
  min-height: 510px;
  padding-block: 64px;
}

.hub-kicker {
  margin: 0;
  color: var(--hub-blue);
  font-size: 14px;
  font-weight: 800;
}

.hub-hero h1,
.hub-section-head h2,
.hub-about h2 {
  margin: 12px 0 0;
  color: var(--hub-ink);
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.hub-hero h1 {
  font-size: 52px;
  line-height: 1.14;
}

.hub-lead {
  max-width: 530px;
  margin: 22px 0 0;
  color: var(--hub-ink-soft);
  font-size: 18px;
  line-height: 1.8;
  text-wrap: pretty;
}

.hub-hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 30px;
}

.hub-hero-actions span {
  color: var(--hub-ink-soft);
  font-size: 13px;
}

.hub-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.hub-button-primary {
  background: var(--hub-blue);
  color: #fff;
}

.hub-button-primary:hover,
.hub-button-primary:focus-visible {
  background: var(--hub-blue-deep);
}

.hub-hero-signal {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 382px;
  overflow: hidden;
  padding: 42px;
  border-radius: 8px;
  background: var(--hub-blue);
}

.hub-hero-signal::before {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hub-hero-signal::before {
  inset: 20px;
  border: 1px solid rgba(255, 255, 255, 0.26);
}

.hub-hero-signal img {
  position: relative;
  z-index: 1;
  width: min(58%, 238px);
  height: auto;
  filter: drop-shadow(0 12px 16px rgba(0, 26, 75, 0.24));
}

.hub-signal-rule {
  position: relative;
  z-index: 1;
  width: 76px;
  height: 2px;
  margin-top: 20px;
  background: #fff;
}

.hub-hero-signal p {
  position: relative;
  z-index: 1;
  margin: 18px 0 0;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.65;
  text-align: center;
}

.hub-tools {
  padding-block: 78px 88px;
}

.hub-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 30px;
}

.hub-section-head h2,
.hub-about h2 {
  font-size: 30px;
  line-height: 1.3;
}

.hub-section-head > p {
  max-width: 370px;
  margin: 0;
  color: var(--hub-ink-soft);
  font-size: 14px;
  text-wrap: pretty;
}

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

.hub-tool-card {
  min-width: 0;
  border: 1px solid var(--hub-border);
  border-radius: 8px;
  background: var(--hub-surface);
}

.hub-tool-card-featured {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: minmax(240px, 0.82fr) minmax(400px, 1.18fr);
  gap: 28px;
  overflow: hidden;
  padding: 30px;
  color: inherit;
  text-decoration: none;
}

.hub-tool-card-featured:hover,
.hub-tool-card-featured:focus-visible {
  border-color: #8cb6e7;
  box-shadow: 0 12px 28px rgba(26, 68, 125, 0.12);
}

.hub-tool-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  min-width: 0;
}

.hub-tool-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--hub-ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.hub-status {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 9px;
  border: 1px solid #d8a06a;
  border-radius: 999px;
  background: #fff8ed;
  color: #9a4d0f;
  font-size: 12px;
}

.hub-status-live {
  border-color: #8bb7e7;
  background: #edf5ff;
  color: var(--hub-blue-deep);
}

.hub-tool-card h3 {
  margin: 15px 0 0;
  color: var(--hub-ink);
  font-size: 23px;
  line-height: 1.35;
  letter-spacing: 0;
  text-wrap: balance;
}

.hub-tool-card p {
  margin: 12px 0 0;
  color: var(--hub-ink-soft);
  font-size: 14px;
  line-height: 1.75;
  text-wrap: pretty;
}

.hub-tool-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 23px;
  color: var(--hub-blue);
  font-size: 14px;
  font-weight: 800;
}

.hub-tool-link b {
  font-size: 18px;
  font-weight: 500;
}

.hub-tool-preview {
  align-self: center;
  margin: 0;
  border: 1px solid #d1dce8;
  border-radius: 6px;
  background: #edf3fa;
  box-shadow: 0 14px 28px rgba(31, 55, 87, 0.14);
  overflow: hidden;
}

.hub-tool-preview img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top center;
}

.hub-tool-card-building {
  padding: 27px;
}

.hub-tool-symbol {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 17px;
  border-radius: 7px;
  background: #eaf5fa;
}

.hub-tool-symbol img {
  width: 52px;
  height: 52px;
}

.hub-tool-card-wide {
  display: flex;
  align-items: end;
  justify-content: space-between;
  grid-column: 1 / -1;
  gap: 28px;
  background: #fff8f5;
  border-color: #ebc8bc;
}

.hub-tool-card-wide > div {
  max-width: 720px;
}

.hub-card-note {
  flex: 0 0 auto;
  margin: 0 !important;
  color: #9b4e43 !important;
  font-size: 13px !important;
  font-weight: 700;
}

.hub-about {
  padding-block: 70px;
  border-top: 1px solid var(--hub-border);
  background: #eaf1f8;
}

.hub-about-inner {
  max-width: 850px;
}

.hub-about-inner > p:last-child {
  margin: 18px 0 0;
  color: var(--hub-ink-soft);
  font-size: 16px;
  line-height: 1.85;
  text-wrap: pretty;
}

.hub-footer {
  background: #172332;
  color: #e9eef5;
}

.hub-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 116px;
}

.hub-footer strong {
  font-size: 14px;
}

.hub-footer p {
  margin: 5px 0 0;
  color: #b9c5d4;
  font-size: 13px;
}

.hub-footer a {
  color: #fff;
  font-size: 13px;
  text-decoration: none;
}

.hub-footer a:hover,
.hub-footer a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 860px) {
  .hub-hero-layout {
    grid-template-columns: 1fr;
    gap: 34px;
    min-height: 0;
    padding-block: 48px;
  }

  .hub-hero-signal {
    min-height: 300px;
  }

  .hub-tool-card-featured {
    grid-template-columns: 1fr;
  }

  .hub-tool-preview {
    max-width: 680px;
  }
}

@media (max-width: 680px) {
  .hub-shell {
    width: min(100% - 32px, 1240px);
  }

  .hub-header-inner {
    min-height: 66px;
  }

  .hub-nav {
    gap: 16px;
  }

  .hub-hero-layout {
    padding-block: 38px;
  }

  .hub-hero h1 {
    font-size: 39px;
  }

  .hub-lead {
    font-size: 16px;
  }

  .hub-hero-signal {
    min-height: 250px;
    padding: 28px;
  }

  .hub-tools {
    padding-block: 54px 62px;
  }

  .hub-section-head,
  .hub-tool-card-wide,
  .hub-footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .hub-section-head {
    gap: 14px;
  }

  .hub-section-head h2,
  .hub-about h2 {
    font-size: 26px;
  }

  .hub-tool-grid {
    grid-template-columns: 1fr;
  }

  .hub-tool-card-featured,
  .hub-tool-card-building {
    padding: 22px;
  }

  .hub-tool-card h3 {
    font-size: 20px;
  }

  .hub-tool-card-wide {
    grid-column: auto;
  }

  .hub-about {
    padding-block: 52px;
  }

  .hub-footer-inner {
    justify-content: center;
    min-height: 132px;
    padding-block: 28px;
  }
}

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