:root {
  --bg: #f2f3f7;
  --bg-light: #ffffff;

  --primary: #ff9f43;
  --primary-light: #ffc078;
  --primary-dark: #e58e26;

  --record: #ff6b6b;

  --text: #4a5568;
  --text-2: #718096;
  --text-3: #a0aec0;

  --shadow-dark: #d1d9e6;
  --shadow-light: #ffffff;

  --success: #55efc4;
  --warning: #ffeaa7;
  --error: #ff7675;
  --info: #74b9ff;

  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;

  --container: 1120px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family:
    ui-rounded,
    "SF Pro Rounded",
    "SF Pro Display",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Arial,
    sans-serif;
  letter-spacing: 0.1px;
  text-rendering: optimizeLegibility;
}

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

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

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 15% 10%, rgba(255, 159, 67, 0.18), transparent 60%),
    radial-gradient(700px 520px at 80% 15%, rgba(116, 185, 255, 0.14), transparent 60%),
    radial-gradient(900px 700px at 50% 95%, rgba(85, 239, 196, 0.11), transparent 60%),
    radial-gradient(circle at 1px 1px, rgba(209, 217, 230, 0.22) 1px, rgba(255, 255, 255, 0) 1.6px);
  background-size: auto, auto, auto, 18px 18px;
  opacity: 0.9;
}

/* Neumorphism primitives */
.convex {
  border-radius: var(--radius-xl);
  background: var(--bg);
  box-shadow: 8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);
}

.concave {
  border-radius: var(--radius-xl);
  background: var(--bg);
  box-shadow: inset 6px 6px 12px var(--shadow-dark), inset -6px -6px 12px var(--shadow-light);
}

.icon {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(242, 243, 247, 0.82);
  border-bottom: 1px solid rgba(209, 217, 230, 0.35);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 18px;
  transition: transform 220ms var(--ease-out);
}

.brand:active {
  transform: translateY(1px);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--primary);
}

.brand-name {
  font-weight: 800;
  letter-spacing: -0.4px;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 0;
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
  border-radius: 18px;
}

.lang-toggle:focus-visible {
  outline: 2px solid rgba(255, 159, 67, 0.55);
  outline-offset: 4px;
}

.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  box-shadow: 0 0 0 4px rgba(255, 159, 67, 0.12);
}

/* Hero */
.hero {
  padding: 44px 0 18px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: start;
}

.logo-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  width: 92px;
  height: 92px;
  border-radius: 28px;
  display: grid;
  place-items: center;
  color: var(--primary);
}

.logo-icon {
  width: 46px;
  height: 46px;
  fill: currentColor;
}

.h1 {
  margin: 0;
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -1px;
}

.tagline {
  margin: 10px 0 0;
  font-weight: 700;
  color: var(--primary);
}

.hero-desc {
  margin: 18px 0 0;
  color: var(--text-2);
  font-size: 16px;
  line-height: 1.75;
  max-width: 54ch;
}

.cta-row {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 14px 16px;
  border-radius: 24px;
  transition: transform 220ms var(--ease-out), box-shadow 220ms var(--ease-out);
}

.btn:active {
  transform: translateY(2px);
}

.btn:focus-visible {
  outline: 2px solid rgba(255, 159, 67, 0.55);
  outline-offset: 4px;
}

.btn-sub {
  font-size: 13px;
  color: rgba(74, 85, 104, 0.72);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  box-shadow: 8px 8px 16px rgba(229, 142, 38, 0.25), -8px -8px 16px var(--shadow-light);
  color: #fff;
}

.btn-primary .btn-sub {
  color: rgba(255, 255, 255, 0.85);
}

.btn-secondary {
  color: var(--text);
}

.btn-inline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-icon {
  width: 34px;
  height: 34px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--bg);
  box-shadow: inset 6px 6px 12px var(--shadow-dark), inset -6px -6px 12px var(--shadow-light);
}

.meta-row {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 18px;
  color: var(--text-2);
  font-weight: 600;
  font-size: 13px;
}

.pill-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  box-shadow: 0 0 0 4px rgba(209, 217, 230, 0.35);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.shot {
  overflow: hidden;
  border-radius: 26px;
  padding: 12px;
}

/* Phone screenshot framing: crop with intent (no vertical gaps) */
.shot img,
.card img {
  background: var(--bg);
}

.shot img {
  border-radius: 18px;
  width: 100%;
  height: 240px;
  object-fit: contain;
  background: var(--bg);
}

.shot figcaption {
  margin-top: 10px;
  font-weight: 700;
  color: var(--text-2);
  text-align: center;
  font-size: 13px;
}

/* Sections */
.section {
  padding: 56px 0;
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.4px;
}

.sub {
  margin: 0;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 70ch;
}

/* Carousel */
.carousel {
  margin-top: 18px;
  padding-bottom: 10px;
}

.carousel-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 330px;
  gap: 14px;
  overflow-x: auto;
  padding: 8px 6px 20px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.carousel-track::-webkit-scrollbar {
  height: 10px;
}

.carousel-track::-webkit-scrollbar-thumb {
  background: rgba(209, 217, 230, 0.9);
  border-radius: 999px;
}

.snap {
  scroll-snap-align: start;
}

.card {
  border-radius: 28px;
  padding: 14px;
  overflow: hidden;
}

.card img {
  aspect-ratio: 9 / 16;
  width: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 18px;
  background: var(--bg);
}

.card figcaption {
  margin-top: 12px;
  display: grid;
  gap: 4px;
}

.cap {
  font-weight: 800;
  letter-spacing: -0.2px;
}

.cap-sub {
  font-size: 13px;
  color: var(--text-2);
}

/* Features */
.feature-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feature {
  padding: 18px;
  border-radius: 28px;
  display: grid;
  gap: 10px;
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  color: var(--primary);
}

.h3 {
  margin: 0;
  font-size: 16px;
  letter-spacing: -0.2px;
}

.p {
  margin: 0;
  color: var(--text-2);
  line-height: 1.7;
  font-size: 14px;
}

/* Steps */
.steps {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.step {
  padding: 18px;
  border-radius: 28px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.step-badge {
  width: 44px;
  height: 44px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-weight: 900;
  color: var(--primary);
}

.step-body {
  display: grid;
  gap: 6px;
}

.how-cta {
  margin-top: 16px;
}

.how-callout {
  border-radius: 28px;
  padding: 14px 16px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.how-callout-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--record), var(--primary));
  box-shadow: 0 0 0 6px rgba(255, 107, 107, 0.12);
}

.how-callout-title {
  font-weight: 900;
  letter-spacing: -0.2px;
}

.how-callout-sub {
  margin-top: 2px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.6;
}

/* Footer */
.footer {
  padding: 40px 0 24px;
  border-top: 1px solid rgba(209, 217, 230, 0.35);
  background: rgba(242, 243, 247, 0.7);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: start;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-mark {
  width: 44px;
  height: 44px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: var(--primary);
}

.footer-name {
  font-weight: 900;
  letter-spacing: -0.2px;
}

.footer-sub {
  margin-top: 2px;
  font-size: 13px;
  color: var(--text-2);
}

.footer-right {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.footer-link {
  padding: 10px 12px;
  border-radius: 16px;
  color: var(--text-2);
  font-weight: 700;
}

.footer-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.25);
}

.footer-bottom {
  grid-column-start: 1;
  grid-column-end: -1;
  padding-top: 10px;
}

.footer-copy {
  color: var(--text-3);
  font-size: 13px;
  font-weight: 700;
}

/* Responsive */
@media (max-width: 980px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

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

  .shot img {
    height: 320px;
  }

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

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

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

  .footer-right {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(var(--container), calc(100% - 28px));
  }

  .h1 {
    font-size: 36px;
  }

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

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

  .shot img {
    height: 420px;
  }

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

  .carousel-track {
    grid-auto-columns: 86%;
  }

  .card img {
    /* aspect-ratio: 9 / 16 inherited from desktop; no height override */
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}