:root {
  --sky-50: #f0f9ff;
  --sky-100: #e0f2fe;
  --sky-500: #0ea5e9;
  --sky-700: #0369a1;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-500: #64748b;
  --slate-700: #334155;
  --slate-900: #0f172a;
  --orange-500: #f97316;
  --orange-600: #ea580c;
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--slate-900);
  background: var(--slate-50);
  line-height: 1.6;
}

body.menu-open {
  overflow: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 16px;
  z-index: 20;
  width: min(1180px, calc(100% - 32px));
  height: 64px;
  margin: 16px auto 0;
  padding: 0 12px 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 60px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 800;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  color: var(--slate-700);
  font-size: 15px;
  font-weight: 600;
}

.nav-links a,
.site-footer a {
  transition: color 180ms ease;
}

.nav-links a:hover,
.site-footer a:hover {
  color: var(--sky-700);
}

.header-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.header-cta,
.primary-button {
  color: var(--white);
  background: var(--orange-500);
  box-shadow: 0 12px 28px rgba(249, 115, 22, 0.24);
}

.header-cta:hover,
.primary-button:hover {
  background: var(--orange-600);
}

.secondary-button {
  color: var(--sky-700);
  border: 1px solid var(--sky-100);
  background: var(--white);
}

.secondary-button:hover {
  border-color: var(--sky-500);
  box-shadow: 0 10px 30px rgba(14, 165, 233, 0.12);
}

.hero {
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100vh - 120px);
  margin: 0 auto;
  padding: 92px 0 52px;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
  gap: 56px;
  align-items: center;
}

.hero-copy {
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--sky-700);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: 56px;
  line-height: 1.08;
  font-weight: 800;
}

h2 {
  margin-bottom: 16px;
  font-size: 40px;
  line-height: 1.18;
  font-weight: 800;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.hero-text {
  max-width: 560px;
  margin-bottom: 30px;
  color: var(--slate-700);
  font-size: 18px;
}

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

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-metrics div {
  padding: 18px;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  margin-bottom: 4px;
  font-size: 20px;
}

.hero-metrics span {
  color: var(--slate-500);
  font-size: 14px;
}

.hero-panel {
  border: 1px solid rgba(14, 165, 233, 0.16);
  border-radius: 8px;
  background: linear-gradient(135deg, var(--white), var(--sky-50));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.window-bar {
  height: 44px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--slate-200);
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--slate-200);
}

.dashboard-preview {
  min-height: 430px;
  display: grid;
  grid-template-columns: 74px 1fr;
}

.dashboard-preview aside {
  padding: 28px 18px;
  display: grid;
  align-content: start;
  gap: 16px;
  border-right: 1px solid var(--slate-200);
  background: rgba(248, 250, 252, 0.76);
}

.dashboard-preview aside span {
  height: 38px;
  border-radius: 8px;
  background: var(--slate-200);
}

.dashboard-preview aside .active {
  background: var(--sky-500);
}

.preview-main {
  padding: 28px;
}

.preview-header {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.preview-header div,
.chat-card,
.knowledge-card {
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  background: var(--white);
}

.preview-header div {
  padding: 18px;
}

.preview-header small,
.knowledge-card span {
  display: block;
  margin-bottom: 6px;
  color: var(--slate-500);
  font-size: 13px;
  font-weight: 700;
}

.preview-header strong {
  font-size: 28px;
}

.chat-card {
  max-width: 82%;
  margin-bottom: 14px;
  padding: 15px 16px;
  color: var(--slate-700);
}

.chat-card.ai {
  margin-left: auto;
  color: #075985;
  border-color: var(--sky-100);
  background: var(--sky-50);
}

.knowledge-card {
  margin-top: 26px;
  padding: 18px;
}

.knowledge-card b {
  display: block;
  color: var(--slate-900);
}

.logo-strip {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 34px;
  padding: 18px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px 32px;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  background: var(--white);
  color: var(--slate-500);
}

.logo-strip b {
  color: var(--slate-900);
}

.section,
.split-section,
.cta-section {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: 86px 0;
}

.section.muted {
  width: 100%;
  max-width: none;
  padding-left: max(16px, calc((100% - 1180px) / 2));
  padding-right: max(16px, calc((100% - 1180px) / 2));
  background: var(--sky-50);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 36px;
}

.section-heading p:not(.eyebrow),
.split-section p,
.cta-section p {
  color: var(--slate-700);
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.steps article,
.price-card {
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  background: var(--white);
}

.feature-card {
  padding: 24px;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.feature-card:hover {
  border-color: var(--sky-100);
  box-shadow: 0 18px 44px rgba(14, 165, 233, 0.1);
}

.icon-box {
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--sky-700);
  background: var(--sky-50);
}

.icon-box svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card p,
.steps p,
.price-card p,
.price-card li {
  color: var(--slate-700);
}

.split-section {
  padding: 46px;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 42px;
  align-items: center;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  background: var(--white);
}

.check-list,
.price-card ul {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.price-card li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
}

.check-list li::before,
.price-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange-500);
}

.placeholder-visual {
  min-height: 330px;
  padding: 36px;
  display: grid;
  align-content: end;
  border: 1px dashed rgba(14, 165, 233, 0.45);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(14, 165, 233, 0.08), rgba(249, 115, 22, 0.07)),
    repeating-linear-gradient(0deg, rgba(15, 23, 42, 0.04) 0 1px, transparent 1px 38px),
    repeating-linear-gradient(90deg, rgba(15, 23, 42, 0.04) 0 1px, transparent 1px 38px);
}

.placeholder-visual span {
  font-size: 28px;
  font-weight: 800;
}

.placeholder-visual p {
  max-width: 380px;
  margin: 10px 0 0;
  color: var(--slate-500);
}

.steps,
.pricing-grid {
  display: grid;
  gap: 18px;
}

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

.steps article {
  padding: 28px;
}

.steps span {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--sky-700);
  font-size: 14px;
  font-weight: 800;
}

.pricing-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.price-card {
  position: relative;
  min-height: 350px;
  padding: 26px;
}

.price-card.featured {
  border-color: var(--sky-500);
  box-shadow: 0 24px 70px rgba(14, 165, 233, 0.16);
}

.badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--white);
  background: var(--orange-500);
  font-size: 12px;
  font-weight: 800;
}

.price-card strong {
  display: block;
  margin: 16px 0 12px;
  font-size: 24px;
  line-height: 1.25;
}

.cta-section {
  margin-bottom: 36px;
  padding: 46px;
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 34px;
  align-items: center;
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, #075985, #0f172a);
}

.cta-section .eyebrow,
.cta-section p {
  color: #bae6fd;
}

.contact-lines {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.contact-lines a {
  min-height: 42px;
  padding: 8px 14px;
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
  transition: background 200ms ease;
}

.contact-lines a:hover {
  background: rgba(255, 255, 255, 0.16);
}

.qr-card {
  padding: 14px;
  border-radius: 8px;
  background: var(--white);
  color: var(--slate-900);
  text-align: center;
}

.qr-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px;
}

.qr-card span {
  display: block;
  margin-top: 10px;
  font-weight: 800;
}

.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 38px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--slate-500);
  font-size: 14px;
}

@media (max-width: 1020px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 72px;
  }

  .hero-copy {
    max-width: 760px;
  }

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

  .split-section,
  .cta-section {
    grid-template-columns: 1fr;
  }

  .qr-card {
    width: 220px;
  }
}

@media (max-width: 760px) {
  .site-header {
    top: 8px;
    width: calc(100% - 16px);
    height: auto;
    min-height: 58px;
    flex-wrap: wrap;
    padding: 10px 12px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding: 8px 0 2px;
    gap: 18px;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 14px;
  }

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

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 30px;
  }

  .hero-text,
  .section-heading p:not(.eyebrow),
  .split-section p,
  .cta-section p {
    font-size: 16px;
  }

  .hero-metrics,
  .steps,
  .feature-grid,
  .pricing-grid,
  .preview-header {
    grid-template-columns: 1fr;
  }

  .dashboard-preview {
    grid-template-columns: 54px 1fr;
    min-height: 360px;
  }

  .preview-main {
    padding: 18px;
  }

  .split-section,
  .cta-section {
    padding: 28px;
  }

  .section {
    padding: 62px 0;
  }

  .qr-card {
    width: 100%;
    max-width: 220px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 460px) {
  .brand span {
    font-size: 15px;
  }

  h1 {
    font-size: 34px;
  }

  .hero-actions,
  .contact-lines {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button,
  .contact-lines a {
    width: 100%;
  }

  .chat-card {
    max-width: 100%;
  }
}

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

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