* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  background: #f7f6f2;
  color: #171944;
  font-family: Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  overflow-x: hidden;
}

.mosaic-overlay {
  position: fixed;
  inset: 0;
  z-index: 9998;
  display: grid;
  pointer-events: none;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.news-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  background: rgba(247, 246, 242, 0.85);
  backdrop-filter: blur(8px);
}

.news-header .logo {
  display: block;
  line-height: 0;
}

.news-header .logo img {
  display: block;
  height: 44px;
  width: auto;
  border-radius: 8px;
}

.back-link {
  padding: 10px 20px;
  border: 2px solid #171944;
  border-radius: 999px;
  color: #171944;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  transition: background 0.3s ease, color 0.3s ease;
}

@media screen and (max-width: 400px) {
    .back-link {
      display: block;
      margin-bottom: 20px;
    }
}

.back-link:hover {
  background: #171944;
  color: #fff;
}

.hero {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  padding: 90px 32px 70px;
}

.hero-label {
  display: inline-block;
  margin: 0 0 18px;
  padding: 9px 18px;
  background: #DA0710;
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.hero-sub {
  margin: 0 0 12px;
  font-size: clamp(16px, 2.4vw, 24px);
  font-weight: 700;
}

.hero-title {
  margin: 0;
  font-size: clamp(34px, 6.2vw, 82px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.hero-title .line {
  display: block;
}

.hero-title .ch {
  display: inline-block;
  white-space: pre;
  will-change: transform;
}

.hero-logo {
  position: absolute;
  top: 64px;
  right: 5vw;
  width: clamp(80px, 11vw, 150px);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.hero-owl {
  position: absolute;
  right: 3vw;
  bottom: -34px;
  z-index: 2;
  width: clamp(150px, 22vw, 260px);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.confetti-piece {
  position: absolute;
  z-index: 1;
  width: 10px;
  height: 16px;
  border-radius: 2px;
  pointer-events: none;
}

.marquee {
  margin: 26px 0 64px;
  padding: 14px 0;
  background: #171944;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  transform: rotate(-1.2deg) scale(1.02);
}

.marquee-track {
  display: inline-block;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.marquee-track span {
  margin-right: 32px;
}

.marquee-track .dot-r {
  color: #DA0710;
}

.marquee-track .dot-y {
  color: #FEB101;
}

.marquee-track .dot-b {
  color: #5a6bff;
}

.news-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 32px 20px;
}

.lead {
  margin: 0 0 70px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 600;
  line-height: 2.2;
}

.card {
  position: relative;
  margin: 0 0 46px;
  padding: 48px 42px 40px;
  background: #fff;
  border: 2px solid #171944;
  border-radius: 24px;
  box-shadow: 0 14px 40px rgba(23, 25, 68, 0.08);
}

.card-num {
  position: absolute;
  top: -26px;
  left: 28px;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 2px solid #171944;
  border-radius: 50%;
  color: #fff;
  font-size: 18px;
  font-weight: 900;
}

.card h2 {
  margin: 0 0 16px;
  font-size: clamp(22px, 3vw, 32px);
  letter-spacing: -0.01em;
}

.card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 2.1;
  color: #2c2e5e;
}

.card p:last-child {
  margin-bottom: 0;
}

.pull {
  display: block;
  margin: 20px 0;
  font-size: clamp(18px, 2.6vw, 26px);
  font-weight: 900;
  color: #171944;
}

.closing {
  padding: 50px 32px 110px;
  text-align: center;
}

.closing p {
  margin: 0 0 36px;
  font-size: clamp(18px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.9;
}

@media (max-width: 768px) {
  .news-header {
    padding: 14px 20px;
  }

  .hero {
    padding: 56px 20px 40px;
  }

  .hero-logo {
    top: 30px;
    right: 20px;
    width: 74px;
  }

  .hero-owl {
    right: 6px;
    bottom: -22px;
    width: 130px;
  }

  .news-body {
    padding: 0 20px 10px;
  }

  .lead {
    margin-bottom: 56px;
  }

  .card {
    padding: 42px 24px 30px;
  }
}