:root {
  --bg: #f7fafc;
  --ink: #243447;
  --muted: #6b7c90;
  --line: rgba(120, 160, 200, 0.18);
  --glass: rgba(255, 255, 255, 0.62);
  --accent: #7eb6e8;
  --accent-deep: #5a9fd4;
  --shadow: 0 20px 60px rgba(140, 180, 220, 0.18);
  --radius: 24px;
  --font: "Sora", "Noto Sans SC", sans-serif;
  --shell: min(1080px, calc(100% - 2.4rem));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, #eef6fb 0%, transparent 55%),
    linear-gradient(180deg, #fbfcfe 0%, #f3f7fb 50%, #eef4f9 100%);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.sky {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.sky__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.7;
}

.sky__glow--a {
  width: 48vw;
  height: 48vw;
  top: -18vw;
  left: 10vw;
  background: radial-gradient(circle, rgba(190, 220, 245, 0.9), transparent 68%);
  animation: driftSoft 20s var(--ease) infinite alternate;
}

.sky__glow--b {
  width: 34vw;
  height: 34vw;
  right: -6vw;
  top: 35vh;
  background: radial-gradient(circle, rgba(210, 230, 245, 0.75), transparent 70%);
  animation: driftSoft 26s var(--ease) infinite alternate-reverse;
}

@keyframes driftSoft {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-3vw, 2vh) scale(1.06); }
}

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 1rem 0;
  background: rgba(251, 252, 254, 0.55);
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}

.nav.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(251, 252, 254, 0.82);
}

.nav__inner {
  width: var(--shell);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand__mark {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 0.45rem;
  background: linear-gradient(145deg, #c9e4f7, #8fc2e8);
  box-shadow: 0 6px 16px rgba(140, 190, 230, 0.35);
}

.nav__links {
  margin-left: auto;
  display: flex;
  gap: 1.4rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav__links a {
  position: relative;
  transition: color 0.25s ease;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 100%;
  height: 1px;
  background: var(--accent-deep);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

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

.nav__links a:hover::after {
  transform: scaleX(1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.35rem;
  border-radius: 999px;
  border: 0;
  background: linear-gradient(135deg, #a8d2ef, #7eb6e8 60%, #6aaadf);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 10px 28px rgba(126, 182, 232, 0.35);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(126, 182, 232, 0.42);
}

.btn--sm {
  padding: 0.5rem 0.95rem;
  font-size: 0.82rem;
}

.hero {
  min-height: min(88vh, 860px);
  display: flex;
  align-items: center;
  padding: 2rem 0 3.5rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero__brand {
  font-size: clamp(2.8rem, 6vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: #2f455c;
}

.hero__title {
  margin-top: 0.9rem;
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 500;
  color: #4a6278;
}

.hero__desc {
  margin-top: 1.1rem;
  max-width: 32rem;
  color: var(--muted);
  font-size: 1rem;
}

.hero__cta {
  margin-top: 1.75rem;
}

.stage {
  position: relative;
}

.stage__screen {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 22%, rgba(255, 255, 255, 0.95), transparent 42%),
    linear-gradient(165deg, #e8f3fa 0%, #cfe3f2 48%, #b7d5eb 100%);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.stage__haze {
  position: absolute;
  inset: -10%;
  background: radial-gradient(ellipse at 60% 40%, rgba(255, 255, 255, 0.55), transparent 55%);
  animation: hazeMove 10s var(--ease) infinite alternate;
}

.stage__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(1px);
}

.stage__orb--a {
  width: 7rem;
  height: 7rem;
  right: 16%;
  top: 24%;
  background: radial-gradient(circle at 35% 30%, #fff, rgba(170, 210, 235, 0.55) 45%, transparent 70%);
  animation: floatY 5s var(--ease) infinite;
}

.stage__orb--b {
  width: 3.8rem;
  height: 3.8rem;
  left: 18%;
  bottom: 30%;
  background: radial-gradient(circle at 35% 30%, #fff, rgba(255, 220, 190, 0.5) 45%, transparent 70%);
  animation: floatY 6.5s var(--ease) infinite reverse;
}

.stage__orb--c {
  width: 2.2rem;
  height: 2.2rem;
  left: 42%;
  top: 18%;
  background: radial-gradient(circle at 35% 30%, #fff, rgba(190, 220, 245, 0.6) 50%, transparent 72%);
  animation: floatY 4.2s var(--ease) infinite 0.4s;
}

.stage__live {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #fff;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  background: rgba(126, 182, 232, 0.85);
  backdrop-filter: blur(8px);
}

@keyframes hazeMove {
  from { transform: translate(-2%, -1%) scale(1); }
  to { transform: translate(3%, 2%) scale(1.05); }
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.section {
  padding: clamp(3rem, 7vh, 5rem) 0;
}

.section__head {
  margin-bottom: 1.8rem;
}

.section__head h2 {
  font-size: clamp(1.55rem, 2.8vw, 2rem);
  letter-spacing: -0.02em;
  font-weight: 600;
}

.section__head p {
  margin-top: 0.45rem;
  color: var(--muted);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.pillar {
  padding: 1.4rem 1.25rem;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 12px 36px rgba(150, 185, 215, 0.1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), background 0.45s ease;
}

.pillar:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 44px rgba(150, 185, 215, 0.18);
  background: rgba(255, 255, 255, 0.82);
}

.pillar__icon {
  width: 2rem;
  height: 2rem;
  margin-bottom: 1rem;
  border-radius: 0.65rem;
  background: linear-gradient(145deg, #f4f9fc, #dcecf6);
  position: relative;
}

.pillar__icon::before {
  content: "";
  position: absolute;
  inset: 28%;
  background: var(--accent-deep);
  opacity: 0.85;
}

.pillar__icon--spark::before {
  clip-path: polygon(50% 0, 62% 38%, 100% 50%, 62% 62%, 50% 100%, 38% 62%, 0 50%, 38% 38%);
}

.pillar__icon--video::before {
  inset: 30% 28% 30% 32%;
  clip-path: polygon(0 0, 70% 0, 70% 30%, 100% 50%, 70% 70%, 70% 100%, 0 100%);
}

.pillar__icon--star::before {
  clip-path: polygon(50% 5%, 61% 35%, 95% 35%, 68% 57%, 79% 91%, 50% 72%, 21% 91%, 32% 57%, 5% 35%, 39% 35%);
}

.pillar__icon--users::before {
  inset: 26%;
  border-radius: 50%;
  box-shadow: 0.5rem 0.12rem 0 0 var(--accent-deep);
}

.pillar h3 {
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.pillar p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
}

.matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 12px 36px rgba(150, 185, 215, 0.1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.matrix__col h3 {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
  color: #3d556c;
}

.matrix__col ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.matrix__col li {
  font-size: 0.86rem;
  color: var(--muted);
  padding-left: 0.85rem;
  position: relative;
}

.matrix__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

.partner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.8rem 1.9rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.75), rgba(230, 242, 250, 0.7));
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.partner h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.partner p {
  color: var(--muted);
}

.footer {
  padding: 2.2rem 0 2.6rem;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.86rem;
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
}

.footer__inner strong {
  color: var(--ink);
  font-weight: 600;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: calc(var(--d, 0) * 0.08s);
}

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

.reveal--delay {
  transition-delay: 0.14s;
}

@media (max-width: 960px) {
  .hero__grid,
  .pillar-grid,
  .matrix {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero__visual {
    order: -1;
  }
}

@media (max-width: 720px) {
  :root {
    --shell: min(1080px, calc(100% - 1.3rem));
  }

  .nav__links {
    display: none;
  }

  .hero__grid,
  .pillar-grid,
  .matrix {
    grid-template-columns: 1fr;
  }

  .matrix {
    gap: 1.4rem;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

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