.start-experience {
  --start-pink: #ff4fa8;
  --start-green: #34f5a5;
  --start-x: 76%;
  --start-y: 24%;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 100svh;
  padding: clamp(180px, 18vw, 310px) clamp(24px, 5vw, 88px) clamp(84px, 10vw, 170px);
  color: #f7f8fb;
  background:
    linear-gradient(180deg, #f6f7fa 0, #b9bac2 2%, #22232b 8%, #080a0f 19%, #06080d 100%);
}

.start-experience::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -3;
  opacity: .26;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: linear-gradient(to bottom, transparent 0, #000 23%, #000 78%, transparent 100%);
}

.start-experience__glow {
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(620px circle at var(--start-x) var(--start-y), rgba(255,79,168,.16), transparent 60%),
    radial-gradient(520px circle at 12% 72%, rgba(52,245,165,.075), transparent 62%);
}

.start-experience__ghost {
  position: absolute;
  right: -1vw;
  top: 10%;
  z-index: -1;
  color: transparent;
  font: 900 clamp(10rem, 30vw, 38rem)/.75 Anton, sans-serif;
  letter-spacing: -.04em;
  -webkit-text-stroke: 1px rgba(255,255,255,.055);
  user-select: none;
}

.start-experience__inner {
  width: min(1540px, 100%);
  margin: 0 auto;
}

.start-experience__header p {
  margin: 0 0 28px;
  color: var(--start-pink);
  font: 800 .76rem/1.2 "Noto Sans JP", sans-serif;
  letter-spacing: .3em;
}

.start-experience__header h2 {
  margin: 0;
  font: 900 clamp(4.4rem, 11vw, 11rem)/.79 Anton, "Noto Sans JP", sans-serif;
  letter-spacing: -.035em;
}

.start-experience__header h2 span { display: block; }
.start-experience__header h2 span:last-child {
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(255,255,255,.8);
}

.start-experience__message {
  display: grid;
  grid-template-columns: minmax(330px, 1fr) minmax(280px, .72fr) minmax(300px, .72fr);
  gap: clamp(32px, 6vw, 110px);
  align-items: end;
  margin-top: clamp(80px, 10vw, 160px);
  padding-top: 38px;
  border-top: 1px solid rgba(255,255,255,.15);
}

.start-experience__message h3,
.start-experience__message p { margin: 0; }
.start-experience__message h3 {
  font-size: clamp(2rem, 3.5vw, 4.3rem);
  line-height: 1.18;
  letter-spacing: -.04em;
}
.start-experience__message h3 em { color: var(--start-green); font-style: normal; }
.start-experience__message p {
  color: #b7bbc5;
  font-size: clamp(.92rem, 1.05vw, 1.1rem);
  font-weight: 700;
  line-height: 2;
}

.start-experience__track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(30px, 8vw, 150px);
  margin-top: clamp(120px, 13vw, 210px);
  padding: 0 0 62px;
}

.start-experience__track-base {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  height: 1px;
  background: rgba(255,255,255,.16);
}
.start-experience__track-base i {
  display: block;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--start-pink), #ba70ff 58%, var(--start-green));
  box-shadow: 0 0 24px rgba(255,79,168,.55);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.25s cubic-bezier(.22,.75,.18,1) .35s;
}
.start-experience.is-in-view .start-experience__track-base i { transform: scaleX(1); }

.start-experience__step {
  position: relative;
  opacity: 0;
  transform: translateY(22px);
  filter: blur(7px);
  transition: opacity .7s ease, transform .7s ease, filter .7s ease;
}
.start-experience.is-in-view .start-experience__step { opacity: 1; transform: none; filter: none; }
.start-experience.is-in-view .start-experience__step:nth-of-type(2) { transition-delay: .45s; }
.start-experience.is-in-view .start-experience__step:nth-of-type(3) { transition-delay: .78s; }
.start-experience.is-in-view .start-experience__step:nth-of-type(4) { transition-delay: 1.08s; }
.start-experience__step > span,
.start-experience__step > small,
.start-experience__step > strong { display: block; }
.start-experience__step > span { color: #6e7480; font: 800 1rem/1 Anton, sans-serif; letter-spacing: .12em; }
.start-experience__step > small { margin-top: 18px; color: #fff; font: 800 clamp(1.35rem, 2.1vw, 2.25rem)/1 Anton, sans-serif; letter-spacing: .04em; }
.start-experience__step > strong { margin-top: 14px; color: #aeb3bd; font-size: clamp(.9rem, 1vw, 1.05rem); }
.start-experience__step > i {
  position: absolute;
  left: 0;
  bottom: -57px;
  width: 18px;
  height: 18px;
  border: 3px solid #080a0f;
  border-radius: 50%;
  background: var(--start-pink);
  box-shadow: 0 0 0 1px rgba(255,79,168,.6), 0 0 22px rgba(255,79,168,.7);
}
.start-experience__step:last-child > i { background: var(--start-green); box-shadow: 0 0 0 1px rgba(52,245,165,.6), 0 0 24px rgba(52,245,165,.7); }

.start-experience__line {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: clamp(90px, 10vw, 142px);
  margin-top: clamp(100px, 10vw, 160px);
  overflow: hidden;
  border: 1px solid rgba(52,245,165,.52);
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  font-size: clamp(1.05rem, 1.8vw, 1.65rem);
  font-weight: 900;
  letter-spacing: .03em;
  transition: color .45s ease, box-shadow .45s ease;
}
.start-experience__line::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--start-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .55s cubic-bezier(.22,.75,.18,1);
}
.start-experience__line-hover { position: absolute; opacity: 0; transform: translateY(18px); transition: .35s ease; }
.start-experience__line-default { transition: .35s ease; }
.start-experience__line b { position: absolute; right: clamp(30px, 5vw, 80px); font-size: 1.5em; }
.start-experience__line:hover { color: #06100c; box-shadow: 0 0 48px rgba(52,245,165,.18); }
.start-experience__line:hover::before { transform: scaleX(1); }
.start-experience__line:hover .start-experience__line-default { opacity: 0; transform: translateY(-18px); }
.start-experience__line:hover .start-experience__line-hover { opacity: 1; transform: none; }

.start-experience__only {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  margin: 24px 0 0;
  color: #717682;
  font: 700 .65rem/1.2 "Noto Sans JP", sans-serif;
  letter-spacing: .22em;
}
.start-experience__only i { width: 3px; height: 3px; border-radius: 50%; background: var(--start-pink); }

.start-experience__final {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: clamp(120px, 15vw, 240px);
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255,255,255,.25);
  color: #fff;
  text-decoration: none;
  transition: border-color .35s ease, color .35s ease;
}
.start-experience__final span { font: 900 clamp(4.6rem, 14vw, 14rem)/.72 Anton, sans-serif; letter-spacing: -.03em; }
.start-experience__final b { font-size: clamp(3rem, 7vw, 7rem); line-height: .7; font-weight: 300; transition: transform .35s ease; }
.start-experience__final:hover { color: var(--start-green); border-color: var(--start-green); }
.start-experience__final:hover b { transform: translateX(16px); }
.start-experience a:focus-visible { outline: 2px solid var(--start-green); outline-offset: 6px; }

.start-experience__header,
.start-experience__message,
.start-experience__line,
.start-experience__only,
.start-experience__final {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .75s ease, transform .75s ease;
}
.start-experience.is-in-view .start-experience__header,
.start-experience.is-in-view .start-experience__message,
.start-experience.is-in-view .start-experience__line,
.start-experience.is-in-view .start-experience__only,
.start-experience.is-in-view .start-experience__final { opacity: 1; transform: none; }
.start-experience.is-in-view .start-experience__message { transition-delay: .15s; }
.start-experience.is-in-view .start-experience__line { transition-delay: .5s; }
.start-experience.is-in-view .start-experience__only { transition-delay: .62s; }
.start-experience.is-in-view .start-experience__final { transition-delay: .72s; }

@media (max-width: 760px) {
  .start-experience {
    min-height: auto;
    padding: 138px 22px 88px;
    background: linear-gradient(180deg, #f6f7fa 0, #393a42 2.5%, #11131a 8%, #06080d 17%, #06080d 100%);
  }
  .start-experience__glow { display: none; }
  .start-experience__ghost { top: 8%; right: -24%; font-size: 11rem; }
  .start-experience__header p { margin-bottom: 22px; font-size: .65rem; }
  .start-experience__header h2 { font-size: clamp(4.2rem, 21vw, 6.1rem); line-height: .83; }
  .start-experience__message { display: block; margin-top: 72px; padding-top: 28px; }
  .start-experience__message h3 { margin-bottom: 32px; font-size: 2rem; }
  .start-experience__message p + p { margin-top: 24px; }
  .start-experience__track { display: block; margin-top: 90px; padding: 0 0 0 44px; }
  .start-experience__track-base { left: 8px; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .start-experience__track-base i { width: 2px; height: 100%; transform: scaleY(0); transform-origin: top; }
  .start-experience.is-in-view .start-experience__track-base i { transform: scaleY(1); }
  .start-experience__step { min-height: 164px; }
  .start-experience__step > small { margin-top: 12px; font-size: 1.65rem; }
  .start-experience__step > strong { margin-top: 10px; }
  .start-experience__step > i { left: -44px; top: 3px; bottom: auto; }
  .start-experience__line { min-height: 78px; margin-top: 88px; font-size: 1rem; }
  .start-experience__line b { right: 25px; }
  .start-experience__only { flex-wrap: wrap; gap: 9px; font-size: .54rem; letter-spacing: .12em; }
  .start-experience__final { margin-top: 112px; padding-bottom: 18px; }
  .start-experience__final span { font-size: clamp(4rem, 20vw, 5.5rem); }
  .start-experience__final b { font-size: 2.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  .start-experience *, .start-experience *::before, .start-experience *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition-duration: .01ms !important;
  }
  .start-experience__header,
  .start-experience__message,
  .start-experience__step,
  .start-experience__line,
  .start-experience__only,
  .start-experience__final { opacity: 1; transform: none; filter: none; }
  .start-experience__track-base i { transform: none; }
}