:root {
  --ink: #151313;
  --muted: rgba(21, 19, 19, 0.64);
  --paper: #fffdf9;
  --coral: #ff5f49;
  --orange: #ff9a3d;
  --mint: #65e8b0;
  --aqua: #37d4e6;
  --blue: #3477ff;
  --line: rgba(21, 19, 19, 0.11);
  --shadow: 0 24px 80px rgba(177, 79, 58, 0.16);
}

* {
  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",
    "Microsoft YaHei", sans-serif;
}

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

.header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(20px, 5.5vw, 78px);
  transition: padding 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.header.is-scrolled {
  padding-top: 14px;
  padding-bottom: 14px;
  background: rgba(255, 253, 249, 0.84);
  backdrop-filter: blur(22px);
  box-shadow: 0 14px 42px rgba(21, 19, 19, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 18px;
  font-weight: 900;
}

.brand-logo {
  height: 1.22em;
  width: auto;
  aspect-ratio: 57.33 / 60.59;
  flex-shrink: 0;
  display: block;
}

.nav {
  display: flex;
  gap: clamp(16px, 3vw, 36px);
  color: rgba(21, 19, 19, 0.7);
  font-size: 15px;
  font-weight: 800;
}

.nav a {
  padding: 8px 0;
}

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

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #fbfcff;
}

.hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-mask {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 253, 249, 0.99), rgba(255, 253, 249, 0.82) 34%, rgba(255, 253, 249, 0.16) 73%),
    linear-gradient(180deg, rgba(255, 253, 249, 0.52), rgba(255, 253, 249, 0.04) 52%, rgba(255, 253, 249, 0.86));
}

.hero-copy {
  position: relative;
  width: min(650px, calc(100% - 40px));
  margin-left: clamp(20px, 7vw, 96px);
  padding-top: 70px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: 0.18em;
}

h1,
h2 {
  margin: 0;
  line-height: 1.03;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(42px, 6.4vw, 88px);
}

h2 {
  font-size: clamp(34px, 4.4vw, 62px);
}

.hero-copy p:not(.eyebrow),
.content > p {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.86;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 28px;
  border-radius: 999px;
  font-weight: 900;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

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

.button.primary {
  color: white;
  background: linear-gradient(135deg, var(--coral), var(--orange));
  box-shadow: 0 16px 36px rgba(255, 95, 73, 0.24);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.68);
}

.split {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: clamp(32px, 5.5vw, 82px);
  align-items: center;
  padding: 112px clamp(20px, 6vw, 92px) 76px;
}

.about {
  background:
    radial-gradient(640px 420px at 16% 24%, rgba(255, 154, 61, 0.16), transparent 70%),
    radial-gradient(640px 420px at 88% 18%, rgba(101, 232, 176, 0.18), transparent 68%),
    linear-gradient(180deg, #ffffff, #fff9f4);
}

.join {
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1fr);
  background:
    radial-gradient(700px 460px at 18% 70%, rgba(55, 212, 230, 0.14), transparent 70%),
    radial-gradient(620px 420px at 86% 22%, rgba(255, 95, 73, 0.14), transparent 68%),
    linear-gradient(180deg, #fffdf9, #ffffff);
}

.visual {
  overflow: hidden;
  border-radius: 8px;
  background: white;
  box-shadow: var(--shadow);
}

.visual img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.capsules {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.capsules span {
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 95, 73, 0.18);
  color: rgba(21, 19, 19, 0.74);
  font-size: 13px;
  font-weight: 850;
}

.notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.notes article,
.role-stack a {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 36px rgba(177, 79, 58, 0.06);
}

.notes article {
  min-height: 150px;
  padding: 20px;
}

.notes b {
  display: block;
  margin-bottom: 18px;
  color: var(--coral);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.notes strong {
  display: block;
  margin-bottom: 8px;
  font-size: 19px;
}

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

.role-stack {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.role-stack a {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  align-items: center;
  padding: 17px 18px;
  transition: transform 180ms ease, border-color 180ms ease;
}

.role-stack a:hover {
  transform: translateX(4px);
  border-color: rgba(255, 95, 73, 0.34);
}

.role-stack span {
  color: var(--coral);
  font-weight: 950;
}

.role-stack b {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 30px clamp(20px, 5.5vw, 78px);
  color: rgba(21, 19, 19, 0.5);
  border-top: 1px solid var(--line);
  background: white;
}

@media (max-width: 900px) {
  .split,
  .join {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 96px;
  }

  .join .visual {
    order: -1;
  }
}

@media (max-width: 640px) {
  .header {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 16px 20px;
  }

  .hero {
    min-height: 760px;
  }

  .hero > img {
    object-position: 66% center;
  }

  .hero-mask {
    background:
      linear-gradient(180deg, rgba(255, 253, 249, 0.96), rgba(255, 253, 249, 0.72) 42%, rgba(255, 253, 249, 0.95)),
      linear-gradient(90deg, rgba(255, 253, 249, 0.84), rgba(255, 253, 249, 0.06));
  }

  .hero-copy {
    margin: 0 auto;
    padding-top: 128px;
  }

  .hero-actions,
  .notes {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .role-stack a {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .footer {
    flex-direction: column;
  }
}