:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f8;
  --bg-subtle: #fbfbfc;
  --text: #111111;
  --muted: #62646a;
  --muted-2: #8a8d94;
  --line: #e7e8eb;
  --line-strong: #d9dbe1;
  --dark: #111111;
  --dark-soft: #1a1b1d;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(17, 17, 17, 0.05);
  --shadow-md: 0 18px 50px rgba(17, 17, 17, 0.08);
  --shadow-lg: 0 32px 90px rgba(17, 17, 17, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 0, #f1f1f2 0, transparent 360px),
    linear-gradient(180deg, #ffffff 0, #fbfbfc 680px, #ffffff 1180px);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  color: transparent;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

.container {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.section {
  position: relative;
  padding: 112px 0;
}

.section-soft {
  border-block: 1px solid var(--line);
  background: var(--bg-soft);
}

.section-dark {
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(180deg, #111111 0, #18191b 100%);
}

.section-dark::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 44px 44px;
  content: "";
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 72%);
  pointer-events: none;
}

.section-dark > .container {
  position: relative;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(231, 232, 235, 0.78);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px) saturate(1.4);
}

.header-inner {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 760;
  letter-spacing: 0;
}

.brand::before {
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background:
    linear-gradient(135deg, #111111 0 48%, #ffffff 48% 54%, #111111 54% 100%);
  box-shadow: var(--shadow-sm);
  content: "";
}

.footer-brand::before {
  display: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(231, 232, 235, 0.8);
  border-radius: 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-sm);
  font-size: 14px;
}

.nav a {
  padding: 8px 12px;
  border-radius: 8px;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.nav a:hover {
  color: var(--text);
  background: var(--bg-soft);
}

.hero {
  padding: 104px 0 112px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
  align-items: center;
  gap: 64px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 16px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 700;
}

.section-dark .eyebrow,
.qrcode-card .eyebrow {
  border-color: rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.07);
}

h1 {
  max-width: 720px;
  font-size: clamp(48px, 5.7vw, 76px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: 0;
}

h2 {
  max-width: 780px;
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.12;
  font-weight: 780;
  letter-spacing: 0;
}

h3 {
  font-size: 22px;
  line-height: 1.25;
  font-weight: 740;
}

.hero-subtitle {
  max-width: 620px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 680;
  transition: box-shadow 160ms ease, transform 160ms ease, background 160ms ease;
}

.button-primary {
  color: var(--white);
  border-color: var(--dark);
  background: var(--dark);
  box-shadow: 0 14px 34px rgba(17, 17, 17, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.button-primary:hover {
  background: #2a2a2a;
  transform: translateY(-1px);
}

.button-secondary {
  color: var(--text);
  background: var(--white);
}

.media-frame,
.screenshot-card,
.qrcode-box {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f7f7f7;
}

.media-frame::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75), inset 0 -1px 0 rgba(17, 17, 17, 0.04);
  content: "";
  pointer-events: none;
}

.hero-media {
  width: min(100%, 300px);
  aspect-ratio: 1170 / 2532;
  justify-self: center;
  border: 10px solid #111111;
  border-radius: 36px;
  background: #f7f7f8;
  box-shadow: var(--shadow-lg);
}

.section-heading {
  display: grid;
  gap: 10px;
  margin-bottom: 48px;
}

.value-layout {
  display: grid;
  gap: 34px;
}

.value-chain {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.value-chain li {
  position: relative;
  display: grid;
  gap: 16px;
  min-height: 116px;
  align-content: center;
  padding: 18px 18px 18px 0;
  color: var(--text);
  font-weight: 720;
}

.value-chain li:not(:last-child)::after {
  position: absolute;
  top: 39px;
  right: 18px;
  left: 58px;
  height: 1px;
  background: var(--line-strong);
  content: "";
}

.value-chain span {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  background: var(--bg-subtle);
  font-size: 11px;
  font-weight: 760;
}

.value-chain strong {
  font-size: 20px;
  line-height: 1.25;
}

.about-copy {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  max-width: none;
  gap: 28px;
  color: var(--muted);
  font-size: 18px;
}

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

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
}

.feature-card {
  display: flex;
  min-height: 330px;
  flex-direction: column;
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.feature-card h3 {
  min-height: 70px;
}

.feature-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.feature-card h3::before {
  display: block;
  width: 32px;
  height: 4px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: var(--dark);
  content: "";
}

.feature-card p {
  margin-top: 9px;
  min-height: 48px;
  color: var(--muted);
}

.feature-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.feature-card li,
.creator-list span {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--bg-subtle);
  font-size: 13px;
}

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

.capability-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.055);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.capability-card p {
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.68);
}

.capability-points {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 26px;
}

.capability-points li {
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.04);
  font-size: 13px;
}

.creator-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: start;
  gap: 72px;
}

.creator-list {
  display: flex;
  flex-wrap: wrap;
  max-width: 560px;
  gap: 10px;
  margin-top: 30px;
}

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

.stat-card {
  display: grid;
  min-height: 166px;
  align-content: space-between;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.stat-card strong {
  font-size: 20px;
}

.stat-card strong::after {
  display: block;
  width: 28px;
  height: 3px;
  margin-top: 12px;
  border-radius: 999px;
  background: var(--dark);
  content: "";
}

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

.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  counter-reset: steps;
}

.steps li {
  display: grid;
  min-height: 190px;
  align-content: start;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.steps span {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 10px;
  color: var(--white);
  background: var(--dark);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14);
  font-size: 14px;
}

.steps strong {
  margin-top: 18px;
  font-size: 18px;
  line-height: 1.3;
}

.steps p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.screenshot-card {
  display: grid;
  grid-template-rows: 1fr auto;
  justify-items: center;
  margin: 0;
  border-radius: 14px;
  padding: 28px 24px 0;
  background:
    linear-gradient(180deg, #ffffff 0, #f7f7f8 100%);
  box-shadow: var(--shadow-md);
}

.screenshot-card img {
  width: min(100%, 292px);
  height: auto;
  aspect-ratio: 1170 / 2532;
  border: 10px solid #111111;
  border-radius: 34px;
  background: #f7f7f8;
  box-shadow:
    0 22px 50px rgba(17, 17, 17, 0.16),
    inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  object-fit: cover;
}

.screenshot-card figcaption {
  position: relative;
  z-index: 2;
  width: calc(100% + 48px);
  margin-top: 28px;
  padding: 15px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--white);
  font-size: 14px;
  font-weight: 680;
}

.qrcode-section {
  padding-top: 32px;
}

.qrcode-card {
  display: grid;
  grid-template-columns: 1fr 232px;
  align-items: center;
  gap: 56px;
  padding: 56px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  color: var(--white);
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.16), transparent 240px),
    var(--dark);
  box-shadow: var(--shadow-lg);
}

.qrcode-card p {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

.qrcode-box {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-color: rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  background-color: #ffffff;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}

.qrcode-box img {
  aspect-ratio: 1;
  border-radius: 10px;
}

.qrcode-box span {
  position: relative;
  z-index: 2;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
  font-weight: 680;
}

.site-footer {
  padding: 54px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--bg-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 32px;
}

.footer-brand {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--text);
}

.site-footer h2 {
  margin-bottom: 12px;
  color: var(--text);
  font-size: 14px;
}

.site-footer a,
.site-footer p {
  display: block;
  margin-top: 8px;
  font-size: 14px;
}

.site-footer a:hover {
  color: var(--text);
}

.footer-legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
}

.footer-legal p,
.footer-legal a {
  margin: 0;
  font-size: 13px;
}

@media (max-width: 980px) {
  .section {
    padding: 84px 0;
  }

  .hero {
    padding-top: 88px;
  }

  .hero-grid,
  .creator-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

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

  .capability-grid .capability-card:first-child {
    grid-column: 1 / -1;
  }

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

  .qrcode-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    background:
      radial-gradient(circle at 50% 0, #f2f2f3 0, transparent 260px),
      #ffffff;
  }

  .container {
    width: min(100% - 28px, 1160px);
  }

  .header-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    min-height: auto;
    align-items: center;
    padding: 12px 0;
  }

  .brand {
    font-size: 18px;
  }

  .brand::before {
    width: 24px;
    height: 24px;
  }

  .nav {
    display: grid;
    width: 100%;
    max-width: none;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 4px;
    padding: 4px;
    border: 1px solid rgba(231, 232, 235, 0.8);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: var(--shadow-sm);
    font-size: 12px;
  }

  .nav a {
    display: grid;
    min-height: 34px;
    place-items: center;
    padding: 6px 4px;
    white-space: nowrap;
  }

  .hero {
    padding: 48px 0 58px;
  }

  .section {
    padding: 60px 0;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  h1 {
    font-size: 38px;
    line-height: 1.08;
  }

  h2 {
    font-size: 28px;
    line-height: 1.18;
  }

  h3 {
    font-size: 20px;
  }

  .hero-subtitle,
  .about-copy,
  .qrcode-card p {
    font-size: 16px;
    line-height: 1.7;
  }

  .about-copy {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .value-layout {
    gap: 28px;
  }

  .value-chain {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px;
  }

  .value-chain li {
    grid-template-columns: 38px 1fr;
    align-items: center;
    min-height: 54px;
    padding: 10px 12px;
  }

  .value-chain li:not(:last-child)::after {
    top: 46px;
    bottom: -10px;
    left: 30px;
    width: 1px;
    height: auto;
  }

  .value-chain span {
    width: 34px;
    height: 34px;
  }

  .value-chain strong {
    font-size: 17px;
  }

  .hero-actions {
    margin-top: 28px;
  }

  .button {
    width: 100%;
  }

  .hero-media {
    width: min(100%, 240px);
    border-width: 8px;
    border-radius: 30px;
  }

  .feature-grid,
  .capability-grid,
  .stats-grid,
  .screenshot-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
    padding: 22px;
  }

  .feature-card h3,
  .feature-card p {
    min-height: 0;
  }

  .capability-card,
  .stat-card,
  .steps li {
    min-height: auto;
    padding: 22px;
  }

  .steps strong {
    margin-top: 8px;
  }

  .screenshot-card {
    padding: 22px 16px 0;
  }

  .screenshot-card img {
    width: min(100%, 260px);
    border-width: 8px;
    border-radius: 30px;
  }

  .screenshot-card figcaption {
    width: calc(100% + 32px);
    margin-top: 22px;
  }

  .qrcode-card {
    gap: 28px;
    padding: 28px 22px;
    border-radius: 14px;
  }

  .qrcode-box {
    width: min(100%, 220px);
    justify-self: center;
  }

  .footer-legal {
    display: grid;
    gap: 8px;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 360px) {
  .container {
    width: min(100% - 24px, 1160px);
  }

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

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 26px;
  }

  .screenshot-card img {
    width: min(100%, 236px);
  }
}