:root {
  --ink: #090910;
  --muted: #5c5f66;
  --line: rgba(9, 9, 16, 0.12);
  --paper: #fbfbfc;
  --soft: #f3f5fb;
  --cyan: #37e7f3;
  --pink: #f678e8;
  --green: #98eea5;
  --yellow: #ffd66b;
  --shadow: 0 28px 90px rgba(32, 35, 50, 0.18);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0;
}

body::selection {
  background: rgba(55, 231, 243, 0.35);
}

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

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

.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 30;
  width: min(calc(100% - 32px), var(--max));
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 10px 12px 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(22px);
  box-shadow: 0 14px 45px rgba(40, 40, 50, 0.1);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 18px;
  white-space: nowrap;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 58% 42%, var(--pink) 0 9%, transparent 10%),
    radial-gradient(circle at 42% 58%, var(--cyan) 0 10%, transparent 11%),
    linear-gradient(135deg, var(--cyan), var(--pink) 58%, var(--green));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.65), 0 10px 28px rgba(246, 120, 232, 0.32);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 8px;
  color: rgba(9, 9, 16, 0.7);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: rgba(9, 9, 16, 0.06);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: rgba(9, 9, 16, 0.06);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 92svh;
  overflow: hidden;
  padding: 144px max(24px, calc((100vw - var(--max)) / 2)) 92px;
  background:
    linear-gradient(125deg, rgba(55, 231, 243, 0.24), rgba(255, 255, 255, 0.22) 34%, rgba(246, 120, 232, 0.26) 68%, rgba(152, 238, 165, 0.2)),
    #f7f8ff;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 16% 24%, rgba(55, 231, 243, 0.56), transparent 23%),
    radial-gradient(circle at 84% 16%, rgba(246, 120, 232, 0.38), transparent 26%),
    radial-gradient(circle at 80% 86%, rgba(152, 238, 165, 0.42), transparent 24%);
  opacity: 0.72;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding-top: min(9vh, 84px);
}

.eyebrow {
  margin: 0 0 14px;
  color: rgba(9, 9, 16, 0.62);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(72px, 15vw, 184px);
  line-height: 0.88;
  font-weight: 950;
}

.hero-lede {
  max-width: 600px;
  margin-bottom: 28px;
  color: rgba(9, 9, 16, 0.74);
  font-size: clamp(20px, 2.4vw, 32px);
  line-height: 1.34;
  font-weight: 800;
}

.hero-actions,
.privacy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
}

.button-primary {
  color: #fff;
  background: var(--ink);
  box-shadow: 0 14px 28px rgba(9, 9, 16, 0.24);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(9, 9, 16, 0.12);
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-shot {
  position: absolute;
  width: clamp(210px, 24vw, 340px);
  border-radius: 32px;
  box-shadow: var(--shadow);
  outline: 8px solid rgba(255, 255, 255, 0.78);
}

.hero-shot-a {
  right: max(24px, calc((100vw - var(--max)) / 2 + 20px));
  top: 116px;
  transform: rotate(5deg);
}

.hero-shot-b {
  right: max(210px, calc((100vw - var(--max)) / 2 + 280px));
  bottom: -112px;
  transform: rotate(-7deg);
}

.hero-shot-c {
  right: max(-22px, calc((100vw - var(--max)) / 2 - 60px));
  bottom: 80px;
  transform: rotate(10deg);
}

.hero-strip {
  position: absolute;
  left: 50%;
  bottom: 18px;
  z-index: 3;
  transform: translateX(-50%);
  width: min(calc(100% - 32px), var(--max));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.hero-strip div {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
}

.hero-strip strong {
  display: block;
  font-size: 24px;
  font-weight: 950;
}

.hero-strip span {
  color: var(--muted);
  font-weight: 700;
}

.section {
  padding: 96px max(24px, calc((100vw - var(--max)) / 2));
}

.section-head {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-head.wide {
  max-width: 980px;
}

.section h2 {
  margin-bottom: 0;
  font-size: clamp(36px, 6vw, 76px);
  line-height: 1.02;
  font-weight: 950;
}

.intro-section {
  background: var(--ink);
  color: #fff;
}

.intro-section .eyebrow,
.intro-section p {
  color: rgba(255, 255, 255, 0.7);
}

.intro-grid,
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.intro-card,
.scene,
.feature-list article {
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 24px;
}

.intro-card h3,
.scene h3 {
  margin-bottom: 10px;
  font-size: 24px;
}

.intro-card p,
.scene p {
  margin-bottom: 0;
  line-height: 1.8;
}

.mini-icon {
  display: block;
  width: 36px;
  height: 36px;
  margin-bottom: 34px;
  border-radius: 8px;
}

.mini-icon.cyan {
  background: linear-gradient(135deg, var(--cyan), #fff);
}

.mini-icon.pink {
  background: linear-gradient(135deg, var(--pink), var(--yellow));
}

.mini-icon.green {
  background: linear-gradient(135deg, var(--green), var(--cyan));
}

.showcase-section {
  overflow: hidden;
  background: #f4f5f8;
}

.phone-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(250px, 318px);
  gap: 22px;
  overflow-x: auto;
  padding: 12px 24px 34px;
  margin: 0 -24px;
  scroll-snap-type: x mandatory;
}

.phone-frame {
  scroll-snap-align: start;
  margin: 0;
  padding: 10px;
  border-radius: 34px;
  background: #111;
  box-shadow: 0 22px 70px rgba(20, 22, 30, 0.18);
}

.phone-frame img {
  width: 100%;
  aspect-ratio: 750 / 1624;
  object-fit: cover;
  object-position: top center;
  border-radius: 25px;
  background: #fff;
}

.phone-frame figcaption {
  color: #fff;
  padding: 12px 10px 6px;
  font-weight: 900;
  text-align: center;
}

.feature-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.86fr) 1.14fr;
  gap: 32px;
  align-items: start;
  background: #fff;
}

.feature-copy {
  position: sticky;
  top: 112px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.feature-list article {
  min-height: 172px;
  background:
    linear-gradient(135deg, rgba(55, 231, 243, 0.14), rgba(246, 120, 232, 0.12)),
    #f7f8ff;
  border-color: rgba(9, 9, 16, 0.08);
}

.feature-list strong {
  display: block;
  margin-bottom: 12px;
  font-size: 28px;
  font-weight: 950;
}

.feature-list span {
  display: block;
  color: var(--muted);
  line-height: 1.8;
}

.scenes-section {
  background:
    linear-gradient(135deg, rgba(55, 231, 243, 0.16), rgba(246, 120, 232, 0.14) 52%, rgba(152, 238, 165, 0.13)),
    #f9fafc;
}

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

.scene {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(9, 9, 16, 0.08);
}

.scene span {
  display: inline-flex;
  margin-bottom: 36px;
  color: var(--muted);
  font-weight: 950;
}

.privacy-section {
  background: #fff;
}

.privacy-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
  padding: clamp(28px, 6vw, 58px);
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.privacy-panel .eyebrow,
.privacy-panel p {
  color: rgba(255, 255, 255, 0.72);
}

.privacy-panel h2 {
  max-width: 760px;
}

.privacy-panel p {
  max-width: 740px;
  margin: 18px 0 0;
  line-height: 1.8;
}

.privacy-panel .button-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  padding: 44px max(24px, calc((100vw - var(--max)) / 2));
  border-top: 1px solid var(--line);
  background: #fff;
}

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

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  font-weight: 800;
}

.legal-line {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  color: var(--muted);
  font-size: 14px;
}

.legal-main {
  padding-top: 112px;
  background:
    linear-gradient(135deg, rgba(55, 231, 243, 0.12), rgba(246, 120, 232, 0.14)),
    #f7f8ff;
}

.legal-hero,
.legal-document {
  width: min(calc(100% - 48px), 940px);
  margin: 0 auto;
}

.legal-hero {
  padding: 52px 0 34px;
}

.legal-hero h1 {
  font-size: clamp(44px, 8vw, 88px);
  line-height: 0.98;
}

.legal-hero p:last-child {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.legal-document {
  margin-bottom: 78px;
  padding: 36px;
  border: 1px solid rgba(9, 9, 16, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 24px 70px rgba(40, 42, 54, 0.08);
}

.legal-document h2 {
  margin: 10px 0 18px;
  font-size: 30px;
}

.legal-document h3 {
  margin: 30px 0 10px;
  font-size: 22px;
}

.legal-document p {
  margin: 0 0 12px;
  color: #30323a;
  line-height: 1.9;
}

@media (max-width: 980px) {
  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    display: none;
    grid-template-columns: 1fr;
    padding: 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 16px 40px rgba(40, 40, 50, 0.14);
  }

  .site-nav.is-open {
    display: grid;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    min-height: 96svh;
    padding-top: 124px;
  }

  .hero-copy {
    padding-top: 0;
  }

  .hero-shot-a {
    right: -24px;
    top: 352px;
    width: 260px;
    opacity: 0.96;
  }

  .hero-shot-b {
    left: 18px;
    right: auto;
    bottom: -120px;
    width: 236px;
  }

  .hero-shot-c {
    right: 34px;
    bottom: 92px;
    width: 210px;
  }

  .hero-strip {
    grid-template-columns: 1fr;
  }

  .hero-strip div:nth-child(n + 2) {
    display: none;
  }

  .intro-grid,
  .feature-band,
  .privacy-panel,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .feature-copy {
    position: static;
  }

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

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

@media (max-width: 680px) {
  .site-header {
    top: 10px;
    width: min(calc(100% - 20px), var(--max));
    min-height: 58px;
  }

  .brand {
    font-size: 16px;
  }

  .hero {
    padding-right: 18px;
    padding-left: 18px;
  }

  h1 {
    font-size: clamp(62px, 19vw, 92px);
  }

  .hero-lede {
    max-width: 360px;
    font-size: 21px;
  }

  .hero-actions {
    max-width: 250px;
  }

  .button {
    width: 100%;
  }

  .hero-shot-a {
    top: 398px;
    width: 216px;
  }

  .hero-shot-b {
    width: 188px;
  }

  .hero-shot-c {
    right: -34px;
    bottom: 150px;
    width: 174px;
  }

  .section {
    padding: 70px 18px;
  }

  .section h2 {
    font-size: 38px;
  }

  .intro-grid,
  .feature-list,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .phone-rail {
    grid-auto-columns: minmax(236px, 78vw);
    padding-left: 18px;
    padding-right: 18px;
    margin-right: -18px;
    margin-left: -18px;
  }

  .privacy-panel {
    padding: 24px;
  }

  .site-footer {
    padding: 34px 18px;
  }

  .legal-hero,
  .legal-document {
    width: min(calc(100% - 28px), 940px);
  }

  .legal-document {
    padding: 22px 18px;
  }
}