:root {
  --bg: #F7F8FA;
  --bg-soft: #EEF1F5;
  --ink: #1A1F2A;
  --ink-soft: #3A4254;
  --muted: #6B7385;
  --amber: #D97A3D;
  --amber-deep: #C4682E;
  --amber-wash: rgba(217, 122, 61, 0.12);
  --teal-wash: rgba(74, 140, 140, 0.14);
  --line: rgba(26, 31, 42, 0.08);
  --line-strong: rgba(26, 31, 42, 0.14);
  --surface: #FFFFFF;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-ui: "Sora", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(217, 122, 61, 0.16), transparent 55%),
    radial-gradient(900px 500px at -10% 70%, rgba(74, 140, 140, 0.1), transparent 50%),
    linear-gradient(180deg, #FBFBFC 0%, var(--bg) 40%, var(--bg-soft) 100%);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  animation: drift 18s var(--ease) infinite alternate;
}

.orb-a {
  width: 48vw;
  height: 48vw;
  top: -16vw;
  right: -10vw;
  background: radial-gradient(circle, rgba(217, 122, 61, 0.35), transparent 70%);
}

.orb-b {
  width: 40vw;
  height: 40vw;
  bottom: 8vh;
  left: -12vw;
  background: radial-gradient(circle, rgba(120, 160, 180, 0.22), transparent 70%);
  animation-delay: -7s;
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-3%, 5%, 0) scale(1.06); }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  backdrop-filter: blur(14px);
  background: rgba(247, 248, 250, 0.82);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--amber-deep);
}

.brand-mark {
  width: 22px;
  height: 22px;
  color: var(--amber);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-cta {
  padding: 8px 14px;
  border: 1px solid rgba(217, 122, 61, 0.4);
  color: var(--amber-deep) !important;
  background: rgba(255, 255, 255, 0.65);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.nav-cta:hover {
  background: var(--amber-wash);
  border-color: var(--amber);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}

.menu-toggle span {
  display: block;
  height: 1.5px;
  width: 20px;
  background: var(--ink);
  margin-left: auto;
}

main {
  position: relative;
  z-index: 1;
}

.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-content: start;
  gap: 36px;
  padding: 48px 28px 0;
  max-width: 1280px;
  margin: 0 auto;
}

.hero-copy {
  max-width: 640px;
  padding-top: 12px;
}

.brand-lockup {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber-deep);
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero h1,
.strip-copy h2,
.section-head h2,
.finale h2,
.module-copy h3,
.platform h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.25;
  color: var(--ink);
}

.hero h1 {
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  margin-bottom: 14px;
  max-width: 18ch;
}

.hero-lead,
.strip-copy p,
.section-head p,
.platform p,
.module-copy p,
.finale p {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.btn-solid {
  background: var(--amber);
  color: #fff;
}

.btn-solid:hover {
  background: var(--amber-deep);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.55);
}

.btn-ghost:hover {
  border-color: rgba(26, 31, 42, 0.28);
  color: var(--ink);
  background: #fff;
}

.hero-stage {
  position: relative;
  margin: 8px -28px 0;
  min-height: 52vh;
}

.hero-web {
  width: 100%;
  border-top: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 -1px 0 var(--line), 0 24px 60px rgba(26, 31, 42, 0.08);
  overflow: hidden;
}

.hero-web img {
  width: 100%;
  height: clamp(280px, 52vh, 560px);
  object-fit: cover;
  object-position: left top;
}

.browser-chrome {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: #F0F2F5;
  border-bottom: 1px solid var(--line);
}

.browser-chrome span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #D5DAE3;
}

.browser-chrome span:nth-child(1) { background: #E8A090; }
.browser-chrome span:nth-child(2) { background: #E2C07A; }
.browser-chrome span:nth-child(3) { background: #9BC4A8; }

.browser-chrome p {
  margin-left: 10px;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.hero-phone {
  position: absolute;
  right: max(24px, 6vw);
  bottom: -28px;
  width: min(280px, 34vw);
  margin: 0;
  filter: drop-shadow(0 24px 40px rgba(26, 31, 42, 0.18));
}

.hero-phone img {
  width: 100%;
  border-radius: 22px;
  border: 1px solid rgba(26, 31, 42, 0.08);
}

.float-soft {
  animation: floaty 7s var(--ease) infinite alternate;
}

@keyframes floaty {
  from { transform: translateY(0); }
  to { transform: translateY(-14px); }
}

.strip {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
  max-width: var(--max);
  margin: 120px auto 0;
  padding: 0 28px;
}

.strip-copy h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin-bottom: 14px;
}

.browser-frame {
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(26, 31, 42, 0.07);
}

.browser-frame img {
  width: 100%;
}

.platforms,
.modules {
  max-width: var(--max);
  margin: 120px auto 0;
  padding: 0 28px;
}

.section-head {
  margin-bottom: 40px;
  max-width: 34rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin-bottom: 12px;
}

.platform-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
}

.platform {
  padding-top: 8px;
}

.platform-label {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 10px;
}

.platform h3 {
  font-size: 1.45rem;
  margin-bottom: 10px;
}

.platform-shot {
  margin: 22px 0 18px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 14px 36px rgba(26, 31, 42, 0.06);
}

.platform-shot img {
  width: 100%;
}

.platform-shot.phone {
  background: transparent;
  border: 0;
  box-shadow: none;
  max-width: 320px;
}

.platform-shot.phone img {
  border-radius: 20px;
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(26, 31, 42, 0.1);
}

.text-link {
  color: var(--amber-deep);
  font-weight: 500;
}

.text-link:hover {
  color: var(--ink);
}

.module {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.module.reverse {
  grid-template-columns: 1.1fr 0.9fr;
}

.module.reverse .module-copy {
  order: 2;
}

.module.reverse .module-media {
  order: 1;
}

.module-copy h3 {
  font-size: 1.55rem;
  margin-bottom: 12px;
}

.module-media {
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}

.module-media.dark {
  background: #1C212B;
}

.module-media img {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  margin: 0 auto;
}

.finale {
  max-width: 720px;
  margin: 120px auto;
  padding: 0 28px;
  text-align: left;
}

.finale .brand-lockup {
  font-size: clamp(2rem, 4vw, 2.8rem);
}

.finale h2 {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  margin: 8px 0 12px;
}

.finale .hero-actions {
  margin-top: 24px;
}

.site-footer {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr auto;
  gap: 24px;
  align-items: end;
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px 28px 56px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer strong {
  display: block;
  color: var(--amber-deep);
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a:hover {
  color: var(--ink);
}

.copyright {
  justify-self: end;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

.delay-1 {
  transition-delay: 0.12s;
}

@media (max-width: 960px) {
  .strip,
  .platform-grid,
  .module,
  .module.reverse {
    grid-template-columns: 1fr;
  }

  .module.reverse .module-copy,
  .module.reverse .module-media {
    order: initial;
  }

  .hero-phone {
    width: min(220px, 42vw);
    right: 16px;
    bottom: -18px;
  }

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

  .copyright {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  .site-nav {
    position: fixed;
    inset: 64px 16px auto;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--line);
    box-shadow: 0 12px 32px rgba(26, 31, 42, 0.08);
  }

  .site-nav.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    padding-top: 28px;
    gap: 28px;
  }

  .hero-stage {
    margin-left: -16px;
    margin-right: -16px;
  }

  .hero-phone {
    display: none;
  }

  .platforms,
  .modules,
  .strip {
    margin-top: 88px;
  }
}