:root {
  --brand: #6252f3;
  --brand-dark: #4338ca;
  --ink: #1f2937;
  --muted: #6b7280;
  --subtle: #f6f7fb;
  --line: #e5e7eb;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(31, 41, 55, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: var(--white);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 32px;
  border-bottom: 1px solid transparent;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.04);
}

.brand,
.desktop-nav,
.mobile-nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 700;
  color: #2f3443;
}

.brand img {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: cover;
}

.desktop-nav {
  gap: 28px;
  color: #374151;
  font-size: 14px;
  font-weight: 600;
}

.desktop-nav a {
  opacity: 0.86;
}

.desktop-nav a:hover {
  color: var(--brand);
  opacity: 1;
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: #4b5563;
}

.mobile-nav {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 19;
  display: none;
  flex-direction: column;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav a {
  padding: 15px 24px;
  border-top: 1px solid #f0f1f4;
  color: #374151;
  font-weight: 600;
}

.section {
  width: min(100% - 48px, 1180px);
  margin: 0 auto;
}

.hero {
  padding: 92px 0 56px;
  text-align: center;
}

.hero-label {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 15px;
  font-weight: 700;
}

.hero h1 {
  width: min(760px, 100%);
  margin: 0 auto;
  color: #202636;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-copy {
  width: min(740px, 100%);
  margin: 24px auto 0;
  color: #7b8494;
  font-size: 17px;
  line-height: 1.85;
}

.showcase {
  width: min(100% - 48px, 1380px);
  margin: 0 auto;
  padding-bottom: 88px;
}

.shot,
.claude-panel,
.grok-panel,
.gemini-panel {
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(17, 24, 39, 0.08);
  box-shadow: 0 18px 70px rgba(15, 23, 42, 0.08);
}

.shot-top {
  border-radius: 14px 14px 0 0;
}

.claude-panel {
  display: grid;
  grid-template-columns: 235px 1fr;
  min-height: 470px;
  margin-top: -2px;
  background: #f4f2e9;
}

.claude-panel aside {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 30px 24px;
  color: #766f61;
  background: #ede9d9;
  font-size: 14px;
}

.claude-panel aside strong {
  margin-bottom: 10px;
  color: #534d42;
  font-size: 18px;
}

.claude-panel > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px;
  text-align: center;
}

.claude-panel p {
  margin: 0 0 18px;
  color: #8a7cf6;
  font-size: 13px;
  font-weight: 700;
}

.claude-panel h2 {
  margin: 0 0 26px;
  color: #756d60;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 400;
}

.prompt-box {
  width: min(560px, 100%);
  padding: 22px 24px;
  border: 1px solid rgba(80, 72, 60, 0.12);
  border-radius: 12px;
  color: #8b8172;
  text-align: left;
  background: var(--white);
  box-shadow: 0 14px 36px rgba(77, 69, 59, 0.13);
}

.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}

.quick-actions span {
  padding: 10px 14px;
  border-radius: 9px;
  color: #8b8172;
  background: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

.grok-panel {
  min-height: 390px;
  margin-top: -1px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  text-align: center;
}

.grok-panel span,
.gemini-panel span {
  align-self: flex-start;
  color: #6b7280;
  font-size: 14px;
  font-weight: 700;
}

.grok-panel p {
  margin: 78px 0 6px;
  color: #515865;
  font-size: 24px;
}

.grok-panel strong {
  font-size: 20px;
  font-weight: 500;
}

.grok-panel div,
.gemini-panel div {
  width: min(520px, 90%);
  margin-top: 30px;
  padding: 16px 22px;
  border-radius: 16px;
  color: #9aa1ae;
  background: #f9fafb;
  box-shadow: inset 0 0 0 1px #edf0f4;
  text-align: left;
}

.gemini-panel {
  min-height: 500px;
  margin-top: -1px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #eff5fd;
  text-align: center;
}

.gemini-panel h2 {
  margin: 110px 0 6px;
  color: #3d4655;
  font-size: 28px;
  font-weight: 500;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 38px 56px;
  padding: 44px 0 110px;
}

.feature-grid article {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 16px;
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 7px;
  color: var(--white);
  background: var(--brand);
  font-size: 12px;
  font-weight: 800;
}

.feature-grid h3 {
  margin: 0 0 10px;
  color: #303746;
  font-size: 17px;
}

.feature-grid p {
  margin: 0;
  color: #687282;
  line-height: 1.8;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  padding: 36px 0 118px;
  text-align: center;
}

.metrics strong {
  display: block;
  color: #202636;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1;
}

.metrics span {
  display: block;
  margin-top: 20px;
  color: #7b8494;
}

.api-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 56px;
  padding: 96px 0;
  border-top: 1px solid #f0f2f5;
}

.api-copy h2,
.pricing h2,
.about h2 {
  margin: 0;
  color: #202636;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.12;
}

.api-copy > p {
  color: #566071;
  font-size: 18px;
  line-height: 1.8;
}

.api-line {
  margin: 34px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 800;
  letter-spacing: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 48px;
}

.primary-button,
.secondary-button,
.plans a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 8px;
  font-weight: 700;
}

.primary-button,
.plans a {
  color: var(--white);
  background: var(--brand);
}

.primary-button:hover,
.plans a:hover {
  background: var(--brand-dark);
}

.secondary-button {
  color: #374151;
  background: #eef0f5;
}

.app-support {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: #7b8494;
  font-size: 14px;
  font-weight: 700;
}

.app-support span {
  flex-basis: 100%;
}

.app-support img,
.app-support i {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #f5f6fa;
}

.app-support img {
  padding: 4px;
  object-fit: contain;
}

.app-support i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-style: normal;
  font-weight: 900;
}

.operation-card {
  padding: 34px;
  border-radius: 18px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.operation-card h3 {
  margin: 0 0 16px;
  font-size: 26px;
}

.operation-card p {
  margin: 0 0 30px;
  color: #677183;
  line-height: 1.8;
}

.operation-card ul,
.plans ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.operation-card li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 0 16px;
  padding: 14px 0;
}

.operation-card li span {
  grid-row: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: var(--white);
  background: var(--brand);
  font-weight: 900;
}

.operation-card li strong {
  align-self: end;
}

.operation-card li em {
  color: #677183;
  font-size: 14px;
  font-style: normal;
  line-height: 1.6;
}

.pricing {
  padding: 96px 0 130px;
  text-align: center;
}

.pricing > p:first-child {
  margin: 0 0 10px;
  color: var(--brand);
  font-weight: 700;
}

.pricing-copy {
  width: min(720px, 100%);
  margin: 20px auto 30px;
  color: #697386;
  line-height: 1.85;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin: 34px 0 74px;
}

.tabs span {
  min-width: 92px;
  padding: 10px 20px;
  border-radius: 999px;
  color: #7a8391;
  background: #e9ecf1;
  font-weight: 700;
}

.tabs span:first-child {
  color: var(--white);
  background: var(--brand);
}

.plans {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 34px 32px;
  text-align: left;
}

.plans article {
  padding: 26px;
  border: 1px solid #edf0f4;
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.04);
}

.plans h3 {
  min-height: 48px;
  margin: 0 0 20px;
  color: #344052;
  font-size: 18px;
  line-height: 1.35;
}

.plans strong {
  display: block;
  color: #202636;
  font-size: clamp(34px, 4vw, 46px);
  line-height: 1;
}

.plans small {
  color: #5b6473;
  font-size: 14px;
}

.plans p {
  min-height: 44px;
  color: #8a93a3;
  font-size: 13px;
  line-height: 1.7;
}

.plans a {
  width: 100%;
  margin: 22px 0;
}

.plans li {
  position: relative;
  margin: 14px 0;
  padding-left: 28px;
  color: #4d5868;
  font-size: 14px;
}

.plans li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--brand);
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.55);
}

.about {
  padding: 92px 0;
  border-top: 1px solid #f0f2f5;
  text-align: center;
}

.about p {
  margin: 24px 0 0;
  color: #697386;
  font-size: 18px;
}

.about a {
  color: var(--brand);
  font-weight: 700;
}

.desktop-nav a[aria-current="page"],
.mobile-nav a[aria-current="page"] {
  color: var(--brand);
}

.keyword-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 56px;
  align-items: center;
  padding: 88px 0 72px;
}

.keyword-hero h1,
.keyword-table-section h2,
.build-roadmap h2 {
  margin: 0;
  color: #202636;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.12;
  letter-spacing: 0;
}

.keyword-hero .hero-copy {
  margin-left: 0;
  margin-right: 0;
  text-align: left;
}

.keyword-summary {
  display: grid;
  gap: 18px;
  padding: 28px;
  border: 1px solid #edf0f4;
  border-radius: 18px;
  background: linear-gradient(135deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: var(--shadow);
}

.keyword-summary div {
  display: grid;
  grid-template-columns: 88px 1fr;
  align-items: center;
  min-height: 78px;
  padding: 16px 18px;
  border: 1px solid #edf0f4;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.82);
}

.keyword-summary strong {
  color: var(--brand);
  font-size: 42px;
  line-height: 1;
}

.keyword-summary span {
  color: #445065;
  font-weight: 800;
}

.intent-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding: 18px 0 78px;
}

.intent-strip article,
.roadmap-list article {
  padding: 26px;
  border: 1px solid #edf0f4;
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.04);
}

.intent-strip span,
.roadmap-list span,
.section-kicker {
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.intent-strip h2,
.roadmap-list h3 {
  margin: 12px 0 12px;
  color: #2d3748;
  font-size: 22px;
}

.intent-strip p,
.roadmap-copy p,
.roadmap-list p {
  margin: 0;
  color: #687282;
  line-height: 1.8;
}

.keyword-table-section {
  padding: 82px 0 96px;
  border-top: 1px solid #f0f2f5;
}

.keyword-table-section h2 {
  margin-top: 10px;
  margin-bottom: 28px;
}

.keyword-table-wrap {
  overflow-x: auto;
  border: 1px solid #edf0f4;
  border-radius: 16px;
  background: var(--white);
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.04);
}

.keyword-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  text-align: left;
}

.keyword-table th,
.keyword-table td {
  padding: 18px 16px;
  border-bottom: 1px solid #edf0f4;
  vertical-align: top;
}

.keyword-table th {
  color: #445065;
  background: #f8fafc;
  font-size: 13px;
  font-weight: 800;
}

.keyword-table td {
  color: #536071;
  font-size: 14px;
  line-height: 1.65;
}

.keyword-table tbody tr:last-child td {
  border-bottom: 0;
}

.keyword-table td:first-child {
  color: #202636;
  font-weight: 800;
}

.keyword-table strong {
  color: #202636;
}

.decision {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.decision-build {
  color: #0f766e;
  background: #ccfbf1;
}

.decision-test {
  color: #5b21b6;
  background: #ede9fe;
}

.decision-watch {
  color: #92400e;
  background: #fef3c7;
}

.build-roadmap {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 48px;
  padding: 92px 0 120px;
  border-top: 1px solid #f0f2f5;
}

.roadmap-copy p {
  margin-top: 24px;
  font-size: 17px;
}

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

.site-footer {
  padding: 38px 24px;
  border-top: 1px solid var(--line);
  color: #8a93a3;
  text-align: center;
  font-size: 13px;
}

.site-footer p {
  margin: 6px 0;
}

@media (max-width: 900px) {
  .site-header {
    padding: 0 20px;
  }

  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .hero {
    padding-top: 70px;
  }

  .claude-panel,
  .api-section,
  .keyword-hero,
  .build-roadmap,
  .plans {
    grid-template-columns: 1fr;
  }

  .claude-panel aside {
    display: none;
  }

  .feature-grid,
  .intent-strip {
    grid-template-columns: 1fr;
    padding-bottom: 70px;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-bottom: 80px;
  }

  .api-section {
    padding: 72px 0;
  }

  .plans article {
    padding: 26px;
    border: 1px solid #edf0f4;
    border-radius: 14px;
  }
}

@media (max-width: 560px) {
  .section,
  .showcase {
    width: min(100% - 32px, 1180px);
  }

  .hero-copy {
    font-size: 15px;
  }

  .claude-panel {
    min-height: 380px;
  }

  .claude-panel > div,
  .grok-panel,
  .gemini-panel {
    padding: 28px 18px;
  }

  .grok-panel,
  .gemini-panel {
    min-height: 320px;
  }

  .grok-panel p {
    margin-top: 42px;
  }

  .gemini-panel h2 {
    margin-top: 58px;
  }

  .metrics {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .operation-card {
    padding: 26px;
  }

  .tabs span {
    min-width: auto;
  }

  .keyword-hero {
    padding-top: 70px;
  }

  .keyword-summary {
    padding: 18px;
  }

  .keyword-table-section,
  .build-roadmap {
    padding: 64px 0;
  }
}