:root {
  --bg-dark: #2C2C32;
  --bg-deep: #2C2C32;
  --bg-mid: #363640;
  --surface: #363640;
  --text-main: #FBFBFB;
  --text-sub: #BFC0D9;
  --accent: #4E1CC5;
  --accent-dark: #4E1CC5;
  --accent-orange: #F28B2F;
  --accent-orange-dark: #F28B2F;
  --line: #363640;
  --placeholder: #BFC0D9;
  --fs-17: 17px;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow: 0 16px 30px rgba(0, 0, 0, 0.35);
  --space-xxl: 120px;
  --space-xl: 90px;
  --space-lg: 64px;
  --space-md: 40px;
  --space-sm: 24px;
  --space-xs: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at 20% 10%, #2C2C32 0%, #2C2C32 45%, #2C2C32 100%);
  line-height: 1.7;
}

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

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

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

.page {
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  width: min(1200px, 90%);
  margin: 0 auto;
}

.container.narrow {
  width: min(980px, 90%);
}

.container.wide {
  width: min(1280px, 92%);
}

.section {
  padding: var(--space-xl) 0;
  position: relative;
  scroll-margin-top: 100px;
}

.section-title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: 0.02em;
  /* margin-bottom: var(--space-sm); */
}

.section-title-image {
  display: inline-block;
  max-width: 70%;
  height: auto;
}

.section-title-image-about {
  max-width: 35%;
}

.section-title-image-challenge {
  max-width: 50%;
}

@media (max-width: 767px) {
  .section-title-image-challenge {
    max-width: 100%;
  }
}

.section-title-image-enterprise {
  max-width: 70%;
}

@media (max-width: 767px) {
  .section-title-image-enterprise {
    max-width: 100%;
  }
}

.section-title-image-chairman {
  max-width: 70%;
}

@media (max-width: 767px) {
  .section-title-image-chairman {
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  .challenge-sub .section-title-image {
    max-width: 100%;
  }
}

.section-title.centered {
  text-align: center;
}

.section-lead {
  color: var(--text-sub);
  max-width: 720px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:focus-visible {
  outline: 2px solid #FBFBFB;
  outline-offset: 2px;
}

.btn-primary {
  background: var(--accent);
  color: #FBFBFB;
  box-shadow: 0 10px 20px rgba(78, 28, 197, 0.35);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-dark);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--line);
  color: var(--text-main);
  background: transparent;
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

@media (max-width: 900px) {
  .section {
    padding: var(--space-lg) 0;
  }
}

@media (max-width: 640px) {
  .section {
    padding: var(--space-md) 0;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 767px) {
  :root {
    --fs-17: 14px;
  }
}

@media (max-width: 767px) {
  .floating-ui {
    display: none;
  }
}