:root {
  --primary: #1d4ed8;
  --primary-dark: #172554;
  --primary-soft: #dbeafe;
  --accent: #f97316;
  --accent-soft: #ffedd5;
  --ink: #0f172a;
  --text: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --panel: #fff;
  --soft-bg: #f8fafc;
  --blue-bg: #eff6ff;
  --cyan-soft: #ecfeff;
  --green-soft: #ecfdf5;
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
  --radius: 8px;
  --header-height: 74px;
}

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

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--soft-bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

body.menu-open {
  overflow: hidden;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 3px solid rgba(29, 78, 216, 0.35);
  outline-offset: 3px;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 700;
  line-height: 1.2;
  white-space: normal;
  text-align: center;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

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

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 12px 24px rgba(249, 115, 22, 0.22);
}

.btn-primary:hover {
  background: #ea580c;
}

.btn-secondary {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 12px 24px rgba(29, 78, 216, 0.18);
}

.btn-secondary:hover {
  background: #1e40af;
}

.btn-outline {
  color: var(--primary);
  background: #fff;
  border-color: rgba(29, 78, 216, 0.24);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: var(--blue-bg);
}

.top-strip {
  color: #dbeafe;
  background: var(--primary-dark);
  font-size: 14px;
}

.top-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 38px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: var(--header-height);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.site-logo img {
  width: 176px;
  height: auto;
}

.main-navigation {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  margin-left: auto;
}

.main-navigation a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.main-navigation a:hover,
.main-navigation a.is-active {
  color: var(--primary);
  background: var(--blue-bg);
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--primary-dark);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.mobile-menu-panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 60;
  width: min(340px, 88vw);
  height: 100vh;
  padding: 22px;
  background: #fff;
  box-shadow: -22px 0 44px rgba(15, 23, 42, 0.18);
  transform: translateX(105%);
  transition: transform 220ms ease;
}

.mobile-menu-panel.active {
  transform: translateX(0);
}

.mobile-menu-panel nav {
  display: grid;
  gap: 8px;
  margin-top: 24px;
}

.mobile-menu-panel a {
  display: flex;
  align-items: center;
  min-height: 46px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 700;
  background: var(--soft-bg);
}

.mobile-menu-panel a:hover {
  color: var(--primary);
  background: var(--blue-bg);
}

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.42);
  opacity: 0;
  transition: opacity 220ms ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
}

.hero-section {
  overflow: hidden;
  background: linear-gradient(180deg, #fff 0%, var(--blue-bg) 100%);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 56px;
  align-items: center;
  min-height: 620px;
  padding: 72px 0 42px;
}

.hero-section h1,
.industry-hero h1,
.topic-article h1 {
  margin: 0;
  color: var(--ink);
  font-size: 48px;
  line-height: 1.14;
  letter-spacing: 0;
}

.hero-section p,
.industry-hero p,
.topic-article p {
  margin: 18px 0 0;
  color: var(--text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-visual {
  position: relative;
  min-height: 390px;
  padding: 28px;
  border: 1px solid rgba(29, 78, 216, 0.14);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-visual::before {
  position: absolute;
  inset: 22px;
  content: "";
  border: 1px solid rgba(14, 165, 233, 0.22);
  border-radius: var(--radius);
  pointer-events: none;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 0 0 56px;
}

.hero-stats > * {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.05);
}

.hero-stats strong,
.stat-value {
  display: block;
  color: var(--primary-dark);
  font-size: 28px;
  line-height: 1.15;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: 34px;
  line-height: 1.22;
  letter-spacing: 0;
}

.section-heading p {
  margin: 12px 0 0;
  color: var(--muted);
}

.quick-entry-section,
.advantages-section,
.core-capability-section,
.products-section,
.operator-section,
.agent-section,
.knowledge-section,
.cta-section {
  padding: 76px 0;
}

.quick-entry-section,
.core-capability-section,
.operator-section,
.knowledge-section {
  background: #fff;
}

.advantages-section,
.products-section,
.agent-section {
  background: var(--soft-bg);
}

.quick-entry-grid,
.advantages-grid,
.capability-grid,
.products-grid,
.operator-grid,
.knowledge-grid,
.industry-grid {
  display: grid;
  gap: 20px;
}

.quick-entry-grid {
  grid-template-columns: repeat(4, 1fr);
}

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

.capability-grid,
.operator-grid,
.knowledge-grid {
  grid-template-columns: repeat(4, 1fr);
}

.products-grid {
  grid-template-columns: repeat(4, 1fr);
}

.quick-entry-section .entry-card,
.advantages-section .advantage-item,
.core-capability-section .capability-item,
.operator-section .operator-item,
.knowledge-section .knowledge-item,
.industry-card,
.plan-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.quick-entry-section .entry-card,
.advantages-section .advantage-item,
.core-capability-section .capability-item,
.operator-section .operator-item,
.knowledge-section .knowledge-item {
  padding: 22px;
}

.plan-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}

.plan-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--blue-bg);
}

.plan-card-content {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
}

.plan-card h3,
.industry-card h3 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.3;
}

.plan-card p,
.industry-card p {
  margin: 0;
  color: var(--muted);
}

.operator-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.agent-section .agent-panel,
.cta-section .cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 34px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.cta-section {
  color: #fff;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.cta-section h2,
.cta-section p {
  color: #fff;
}

.site-footer {
  color: #cbd5e1;
  background: var(--primary-dark);
}

.site-footer a:hover {
  color: #fff;
}

.footer-layout {
  display: grid;
  grid-template-columns: 1.25fr repeat(3, 1fr);
  gap: 32px;
  padding: 54px 0;
}

.footer-column h3,
.footer-column h4 {
  margin: 0 0 14px;
  color: #fff;
}

.footer-column ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-bottom {
  padding: 18px 0;
  border-top: 1px solid rgba(226, 232, 240, 0.18);
  color: #93c5fd;
  font-size: 14px;
}

.mobile-bottom-bar {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--line);
  box-shadow: 0 -12px 30px rgba(15, 23, 42, 0.1);
}

.mobile-bottom-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px;
  border-radius: var(--radius);
  color: var(--primary-dark);
  background: var(--blue-bg);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.floating-tools {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 35;
  display: grid;
  gap: 10px;
}

.floating-tools a,
.back-to-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--primary);
  background: #fff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
}

.back-to-top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.industry-page,
.topic-page {
  background: var(--soft-bg);
}

.industry-hero {
  padding: 72px 0;
  background: linear-gradient(180deg, #fff 0%, var(--blue-bg) 100%);
}

.industry-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  padding: 64px 0;
}

.industry-card {
  display: grid;
  gap: 14px;
  padding: 20px;
}

.industry-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--blue-bg);
}

.industry-sidebar,
.topic-nav {
  align-self: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.topic-page {
  padding: 56px 0;
}

.topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
}

.topic-article {
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.topic-article h2 {
  margin: 34px 0 10px;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.28;
}

.topic-nav ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.topic-nav a {
  color: var(--primary);
  font-weight: 700;
}

.app-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 420ms ease, transform 420ms ease;
}

.app-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .container {
    width: min(100% - 32px, 960px);
  }

  .main-navigation {
    display: none;
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .hero-layout,
  .industry-layout,
  .topic-layout {
    grid-template-columns: 1fr;
  }

  .hero-layout {
    gap: 34px;
    min-height: auto;
    padding: 56px 0 34px;
  }

  .quick-entry-grid,
  .capability-grid,
  .operator-grid,
  .knowledge-grid,
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-layout {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  body {
    padding-bottom: 70px;
  }

  .top-strip .container {
    justify-content: center;
    text-align: center;
  }

  .site-logo img {
    width: 150px;
  }

  .hero-section h1,
  .industry-hero h1,
  .topic-article h1 {
    font-size: 36px;
  }

  .section-heading h2 {
    font-size: 28px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .btn,
  .agent-panel .btn,
  .cta-panel .btn {
    width: 100%;
  }

  .hero-visual {
    min-height: 280px;
    padding: 20px;
  }

  .hero-stats,
  .quick-entry-grid,
  .advantages-grid,
  .capability-grid,
  .products-grid,
  .operator-grid,
  .knowledge-grid,
  .industry-grid {
    grid-template-columns: 1fr;
  }

  .quick-entry-section,
  .advantages-section,
  .core-capability-section,
  .products-section,
  .operator-section,
  .agent-section,
  .knowledge-section,
  .cta-section {
    padding: 52px 0;
  }

  .agent-section .agent-panel,
  .cta-section .cta-panel {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .topic-article {
    padding: 26px;
  }

  .mobile-bottom-bar {
    display: grid;
  }

  .floating-tools {
    right: 14px;
    bottom: 86px;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 24px, 440px);
  }

  .header-inner {
    min-height: 64px;
  }

  .site-logo img {
    width: 132px;
  }

  .hero-section h1,
  .industry-hero h1,
  .topic-article h1 {
    font-size: 31px;
  }

  .section-heading h2 {
    font-size: 24px;
  }

  .btn {
    min-height: 46px;
    padding: 11px 14px;
  }

  .hero-layout {
    padding-top: 42px;
  }

  .hero-stats strong,
  .stat-value {
    font-size: 24px;
  }

  .plan-card-content,
  .industry-card,
  .quick-entry-section .entry-card,
  .advantages-section .advantage-item,
  .core-capability-section .capability-item,
  .operator-section .operator-item,
  .knowledge-section .knowledge-item {
    padding: 16px;
  }

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