:root {
  color-scheme: dark;
  --bg: #07080d;
  --panel: #111520;
  --panel-2: #171d2a;
  --line: rgba(255, 255, 255, 0.12);
  --text: #f7fbff;
  --muted: rgba(235, 242, 255, 0.66);
  --cyan: #58e6ff;
  --lime: #99f075;
  --violet: #9b7bff;
  --pink: #ff6ea8;
  --amber: #ffc95a;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(118deg, rgba(88, 230, 255, 0.13), transparent 32%),
    linear-gradient(242deg, rgba(255, 110, 168, 0.12), transparent 34%),
    linear-gradient(180deg, rgba(153, 123, 255, 0.09), transparent 44%),
    var(--bg);
  background-size: 36px 36px, 36px 36px, auto, auto, auto, auto;
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: 74px;
  padding: 0 max(20px, calc((100vw - var(--container)) / 2));
  background: rgba(7, 8, 13, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 11px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.24), transparent),
    linear-gradient(135deg, var(--cyan), var(--violet) 48%, var(--pink));
  color: #061018;
  box-shadow: 0 0 24px rgba(88, 230, 255, 0.34);
}

.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover {
  color: #fff;
}

.top-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.055);
  font-weight: 800;
}

.hero {
  position: relative;
  isolation: isolate;
  width: min(100%, 1500px);
  margin: 0 auto;
  padding: 82px 24px 58px;
}

.hero-copy {
  display: grid;
  place-items: center;
  max-width: 1180px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 1280px;
  margin: 0;
  font-size: clamp(38px, 4.1vw, 56px);
  line-height: 1.12;
  font-weight: 950;
  white-space: nowrap;
}

.hero-subtitle {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.72;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.hero-tags span {
  min-height: 34px;
  padding: 7px 13px;
  border: 1px solid rgba(88, 230, 255, 0.2);
  border-radius: 999px;
  background: rgba(88, 230, 255, 0.07);
  color: #dff9ff;
  font-size: 14px;
  font-weight: 800;
}

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

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 170px;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 900;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn {
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--pink));
  color: #05070b;
  box-shadow: 0 0 38px rgba(88, 230, 255, 0.22);
}

.secondary-btn {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.055);
  color: #fff;
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-2px);
}

.hero-stage {
  position: relative;
  width: min(var(--container), 100%);
  margin: 64px auto 0;
}

.app-shell {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.035));
  box-shadow: 0 32px 120px rgba(0, 0, 0, 0.5);
}

.app-shell::before {
  position: absolute;
  inset: -2px;
  z-index: -1;
  background: linear-gradient(120deg, rgba(88, 230, 255, 0.6), transparent, rgba(255, 110, 168, 0.45));
  content: "";
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(6, 8, 12, 0.62);
}

.window-bar span {
  width: 11px;
  height: 11px;
  border-radius: 999px;
}

.window-bar span:nth-child(1) { background: #ff6377; }
.window-bar span:nth-child(2) { background: #ffc95a; }
.window-bar span:nth-child(3) { background: #75f08f; }

.window-bar strong {
  margin-left: 12px;
  color: var(--muted);
  font-size: 13px;
}

.app-grid {
  display: grid;
  grid-template-columns: 210px 1fr;
  min-height: 540px;
}

.app-sidebar {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(3, 5, 9, 0.34);
}

.tool {
  min-height: 42px;
  padding: 12px 14px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted);
  font-weight: 800;
}

.tool.active {
  border-color: rgba(88, 230, 255, 0.24);
  background: rgba(88, 230, 255, 0.1);
  color: var(--cyan);
}

.editor-mock {
  padding: 26px;
}

.editor-line {
  height: 14px;
  width: 72%;
  margin-bottom: 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}

.editor-line.wide { width: 88%; }
.editor-line.short { width: 46%; }

.ai-chip {
  display: inline-flex;
  margin: 8px 0 26px;
  padding: 9px 12px;
  border: 1px solid rgba(153, 240, 117, 0.28);
  border-radius: 999px;
  background: rgba(153, 240, 117, 0.1);
  color: #dfffd1;
  font-size: 13px;
  font-weight: 900;
}

.canvas-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.preview-card,
.case-card {
  position: relative;
  min-height: 360px;
  padding: 28px;
  overflow: hidden;
  border-radius: 16px;
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.28);
}

.preview-card::after,
.case-card::after {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.55) 1px, transparent 1px);
  background-size: 18px 18px;
  opacity: 0.16;
  content: "";
}

.preview-card small,
.case-card span,
.preview-card h3,
.case-card h3,
.preview-card p,
.case-card p {
  position: relative;
  z-index: 1;
}

.preview-card small,
.case-card span {
  color: currentColor;
  font-size: 12px;
  font-weight: 900;
  opacity: 0.68;
}

.preview-card h3,
.case-card h3 {
  margin: 42px 0 20px;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.08;
}

.preview-card p,
.case-card p {
  color: currentColor;
  line-height: 1.75;
  opacity: 0.78;
}

.preview-card.neon {
  background: radial-gradient(circle at 20% 10%, rgba(88, 230, 255, 0.36), transparent 34%), #10182a;
  color: #f4fbff;
}

.preview-card.light {
  background: linear-gradient(160deg, #f4f1e9, #bcebd3);
  color: #101613;
}

.floating-card {
  position: absolute;
  z-index: 5;
  width: 190px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px;
  background: rgba(10, 13, 20, 0.78);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.38);
  backdrop-filter: blur(18px);
}

.floating-card span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.floating-card strong {
  display: block;
  margin: 8px 0;
}

.floating-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.float-one {
  top: 76px;
  left: 18px;
  transform: rotate(-8deg);
}

.float-two {
  right: 18px;
  bottom: 80px;
  transform: rotate(7deg);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  width: min(var(--container), calc(100% - 40px));
  margin: 16px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--line);
}

.metrics div {
  padding: 26px;
  background: rgba(13, 17, 26, 0.9);
}

.metrics strong {
  display: block;
  margin-bottom: 6px;
  font-size: 36px;
}

.metrics span {
  color: var(--muted);
}

.section {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
  padding: 108px 0 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 36px;
}

.section-heading.compact {
  max-width: 620px;
}

.section-heading h2,
.power-panel h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.08;
}

.section-heading p:not(.eyebrow),
.power-panel p,
.final-cta p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.72;
}

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

.engine-grid article,
.timeline article,
.pricing-grid article {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.055);
}

.engine-grid article {
  padding: 26px;
}

.icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(88, 230, 255, 0.18), rgba(155, 123, 255, 0.16));
  color: var(--cyan);
  font-size: 22px;
}

.engine-grid h3,
.timeline h3,
.pricing-grid h3 {
  margin: 22px 0 10px;
  font-size: 22px;
}

.engine-grid p,
.timeline p,
.pricing-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.timeline article {
  padding: 28px;
}

.timeline span {
  color: var(--pink);
  font-weight: 950;
}

.template-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.case-card {
  min-height: 330px;
}

.case-card.dark {
  background: radial-gradient(circle at 30% 10%, rgba(88, 230, 255, 0.28), transparent 35%), #111827;
  color: #f8fbff;
}

.case-card.paper {
  background: linear-gradient(160deg, #f9f1de, #d8f0df);
  color: #151a18;
}

.case-card.signal {
  background:
    linear-gradient(90deg, rgba(255, 201, 90, 0.18) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 201, 90, 0.14) 1px, transparent 1px),
    #121315;
  background-size: 24px 24px;
  color: #fff6dc;
}

.case-card.coral {
  background: linear-gradient(150deg, #402139, #ff8a75);
  color: #fff8f4;
}

.case-card.ocean {
  background: linear-gradient(140deg, #0b2335, #48c7d6);
  color: #effdff;
}

.case-card.mono {
  background: linear-gradient(150deg, #eeeeee, #9fa7b4);
  color: #111319;
}

.power-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 30px;
  padding: 38px;
  border: 1px solid rgba(88, 230, 255, 0.18);
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(88, 230, 255, 0.12), transparent 44%),
    rgba(255, 255, 255, 0.055);
}

.power-panel ul {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.power-panel li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.18);
  color: rgba(247, 251, 255, 0.88);
}

.product-asset {
  display: block;
  width: 100%;
  margin-top: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.3);
}

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

.pricing-grid article {
  position: relative;
  padding: 30px;
}

.pricing-grid article.featured {
  border-color: rgba(88, 230, 255, 0.42);
  background: linear-gradient(180deg, rgba(88, 230, 255, 0.12), rgba(255, 255, 255, 0.055));
}

.badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(153, 240, 117, 0.12);
  color: #dfffce;
  font-size: 12px;
  font-weight: 900;
}

.pricing-grid strong {
  display: block;
  margin: 24px 0;
  font-size: 34px;
}

.pricing-grid ul {
  display: grid;
  gap: 12px;
  min-height: 112px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: rgba(247, 251, 255, 0.82);
}

.pricing-grid li::before {
  color: var(--lime);
  content: "✓ ";
}

.pricing-grid a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 900;
}

.pricing-grid .featured a {
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  color: #061018;
}

.final-cta {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
  padding: 120px 0 96px;
  text-align: center;
}

.final-cta p:not(.eyebrow) {
  max-width: 720px;
  margin: 22px auto 32px;
}

.site-footer {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 60px;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.footer-inner p {
  margin: 0;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 16px;
  margin-left: auto;
  color: var(--muted);
  font-weight: 800;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1050px) {
  .engine-grid,
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .template-wall,
  .pricing-grid,
  .timeline,
  .power-panel {
    grid-template-columns: 1fr;
  }

  .floating-card {
    display: none;
  }
}

@media (max-width: 800px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: clamp(36px, 9vw, 52px);
    white-space: normal;
  }

  .top-action {
    margin-left: auto;
  }

  .app-grid {
    grid-template-columns: 1fr;
  }

  .app-sidebar {
    display: none;
  }

  .canvas-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    margin-left: 0;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 0 16px;
  }

  .top-action {
    display: none;
  }

  .hero {
    padding: 58px 16px 38px;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

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

  .preview-card,
  .case-card {
    min-height: 300px;
  }

  .editor-mock {
    padding: 18px;
  }
}