@font-face {
  font-family: Millik;
  font-weight: 700;
  src: url(./asset/font/Millik.c3f91cb.ttf) format("truetype");
  text-rendering: optimizeLegibility;
}

:root {
  --post-spacing: 1.78vw;
  --post-size: 25vw;
  --mask-size: 100vw;
}

* {
  padding: 0;
  margin: 0;
  font-family: Millik, Arial, sans-serif;
  font-size: 62.5%;
  -ms-text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
}

body {
  min-height: 100svh;
  background: #fff;
  background-image: url(./asset/image/backgrounds/grid.svg);
  background-repeat: repeat;
  background-size: 300px 300px;
}

#flow-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.78;
}

#snow-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 8;
}

.snow-toggle {
  position: fixed;
  top: max(14px, env(safe-area-inset-top, 0px));
  right: max(14px, env(safe-area-inset-right, 0px));
  width: 42px;
  height: 42px;
  border: 1px solid rgba(23, 23, 23, 0.7);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: #171717;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 12;
  transition: transform 0.22s ease, background-color 0.22s ease, box-shadow 0.22s ease;
}

.snow-toggle:hover {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 8px 20px rgba(23, 23, 23, 0.15);
}

.snow-toggle:active {
  transform: scale(0.96);
}

.snow-toggle-icon {
  width: 18px;
  height: 18px;
  display: block;
}

.snow-toggle.is-active {
  background: rgba(255, 255, 255, 0.98);
}

.hero-shell {
  position: relative;
  z-index: 1;
  min-height: 100svh;
}

.title {
  position: absolute;
  left: 50%;
  top: 5%;
  transform: translate(-50%, -5%);
  width: min(96vw, 1400px);
  text-align: center;
}

.title p {
  font-size: clamp(2.4rem, 4vw, 4rem);
  font-weight: 800;
  white-space: nowrap;
}

#banner {
  overflow: hidden;
  position: relative;
  width: 100vw;
  height: calc(var(--post-size) / 0.72);
  -webkit-mask: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNDQwIiBoZWlnaHQ9IjUwMCIgdmlld0JveD0iMCAwIDE0NDAgNTAwIj48cGF0aCBmaWxsPSJyZ2IoMjAwLDIwMCwyMDApIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiIGQ9Ik0wIDBzMjc1LjA0IDEwMCA3MjAgMTAwUzE0NDAgMCAxNDQwIDB2NTAwcy0yNzUuMDQtMTAwLTcyMC0xMDBTMCA1MDAgMCA1MDBWMHoiLz48L3N2Zz4=);
  mask: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNDQwIiBoZWlnaHQ9IjUwMCIgdmlld0JveD0iMCAwIDE0NDAgNTAwIj48cGF0aCBmaWxsPSJyZ2IoMjAwLDIwMCwyMDApIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiIGQ9Ik0wIDBzMjc1LjA0IDEwMCA3MjAgMTAwUzE0NDAgMCAxNDQwIDB2NTAwcy0yNzUuMDQtMTAwLTcyMC0xMDBTMCA1MDAgMCA1MDBWMHoiLz48L3N2Zz4=);
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: var(--mask-size);
  mask-size: var(--mask-size);
  position: absolute;
  top: 10%;
  touch-action: pan-x pinch-zoom;
  z-index: 1;
}

#banner .img-wrapper {
  display: flex;
  position: absolute;
  inset: 0;
  width: 100%;
  height: calc(var(--post-size) / 0.72);
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  padding-left: calc((100vw - var(--post-size)) / 2);
  padding-right: calc((100vw - var(--post-size)) / 2);
  will-change: scroll-position;
  touch-action: pan-x pinch-zoom;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

#banner .img-wrapper::-webkit-scrollbar {
  width: 0;
  height: 0;
}

#banner .img-wrapper .img-box {
  height: 100%;
  display: block;
  margin-right: var(--post-spacing);
  position: relative;
  cursor: pointer;
  flex: 0 0 auto;
  text-decoration: none;
  color: inherit;
  scroll-snap-align: center;
}

#banner .img-wrapper .img-box .info {
  position: absolute;
  display: flex;
  flex-direction: column;
  justify-content: center;
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  background: rgba(23, 23, 23, 0.5);
  text-align: center;
  color: #fff9f1;
  font-size: 4rem;
}

#banner .img-wrapper .img-box img {
  width: var(--post-size);
  height: 100%;
  object-position: center;
  object-fit: cover;
}

.btn-group {
  height: 15vh;
  position: absolute;
  left: 50%;
  bottom: max(1vh, env(safe-area-inset-bottom, 0px));
  transform: translate(-50%, -40%);
  transition: opacity 0.38s ease, transform 0.38s ease;
  opacity: 0;
  z-index: 2;
}

.btn-group .btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 1px solid #171717;
  background-color: #fff;
  margin: 10px;
  cursor: pointer;
  transition: 0.4s;
  box-sizing: border-box;
}

.btn-group .btn:hover {
  transform: scale(1.2);
  background-color: #000;
}

.btn-group .btn:hover .icon {
  fill: #fff;
}

.btn-group .btn .icon {
  width: 30px;
  height: 30px;
}

.btn-group .btn .right {
  transform: rotate(180deg);
}

.carousel-progress {
  position: absolute;
  left: 50%;
  bottom: max(0.6vh, env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  width: min(80vw, 820px);
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.carousel-progress.is-ready {
  opacity: 1;
}

.btn-group.is-hidden,
.carousel-progress.is-hidden {
  opacity: 0 !important;
  pointer-events: none;
}

.carousel-progress.is-hidden {
  transform: translateX(-50%) translateY(10px);
}

.carousel-progress-track {
  position: relative;
  flex: 1 1 auto;
  height: 9px;
  border: 1px solid #171717;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  overflow: hidden;
}

.carousel-progress-fill {
  width: 100%;
  height: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, #171717 0%, #525252 100%);
}

.carousel-progress-text {
  min-width: 80px;
  text-align: right;
  font-size: 1.4rem;
  color: #171717;
}

.scroll-hint {
  position: fixed;
  left: 50%;
  bottom: max(2px, env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  width: min(88vw, 660px);
  display: none;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.scroll-hint.is-ready {
  opacity: 1;
}

.scroll-hint.is-hidden {
  opacity: 0 !important;
  pointer-events: none;
}

.scroll-hint-arrow {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #171717;
  opacity: 0.68;
  font-size: 24px;
  font-weight: 300;
  line-height: 1;
  font-family: inherit;
  transform: rotate(90deg);
  transform-origin: center;
  user-select: none;
}

.support-panel {
  position: relative;
  z-index: 1;
  width: min(92vw, 1200px);
  margin: 0 auto 7vh;
  padding: 0;
  border: 0;
  background: transparent;
}

.support-title {
  font-size: clamp(4.8rem, 9.5vw, 13rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  margin-bottom: 1.8rem;
  text-align: center;
  font-family: "STCaoshu", "FZCaoshu-S09S", "STXingkai", "FZXingKai-S04S", "Kaiti SC", "STKaiti", "KaiTi", "DFKai-SB", cursive;
}

.support-title-image-wrap {
  line-height: 0;
}

.support-title-image {
  width: min(92vw, 1180px);
  height: auto;
  display: block;
  margin: 0 auto;
}

.support-muted,
.support-copy p {
  color: #7b7b7b;
  font-size: clamp(1.15rem, 1.1vw, 1.45rem);
  line-height: 1.95;
}

.support-copy p + p {
  margin-top: 0.9rem;
}

.support-copy .support-copy-final {
  color: #000;
  font-weight: 900;
}

.support-copy .support-contact {
  color: #000;
  font-weight: 400;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.desktop-landing {
  margin-top: 0;
  padding-top: 0;
  padding-bottom: 3rem;
}

.support-panel [data-reveal] {
  --reveal-progress: 0;
  opacity: calc(0.08 + var(--reveal-progress) * 0.92);
  transform: translate3d(0, calc((1 - var(--reveal-progress)) * 32px), 0);
  transition: opacity 0.2s linear, transform 0.2s linear;
  will-change: opacity, transform;
}

.support-panel .support-title[data-reveal] {
  transition-duration: 0.24s;
}

.desktop-landing .support-title {
  min-height: clamp(220px, 40vh, 420px);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.6rem;
}

.desktop-landing .support-title-image {
  width: min(88vw, 1120px);
}

.desktop-landing .support-copy {
  width: min(88vw, 1120px);
  margin: 0 auto;
}

.support-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.6rem;
  padding: 0.9rem 1.6rem;
  border: 1px solid #171717;
  color: #171717;
  text-decoration: none;
  font-size: 1.5rem;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.support-link:hover {
  background-color: #171717;
  color: #fff;
}

.desktop-support {
  display: block;
}

.mobile-support {
  display: none;
}

@media (max-width: 1024px) {
  :root {
    --post-spacing: 2.2vw;
    --post-size: 32vw;
    --mask-size: 120vw;
  }
}

@media (max-width: 768px) {
  :root {
    --post-spacing: 2vw;
    --post-size: 54vw;
    --mask-size: 190vw;
  }

  .title {
    top: 2.5%;
    transform: translate(-50%, 0);
  }

  .title p {
    font-size: clamp(2rem, 8vw, 3.2rem);
    line-height: 1.1;
    white-space: normal;
  }

  #banner {
    top: 14%;
  }

  #banner .img-wrapper .img-box .info {
    font-size: clamp(2.2rem, 6vw, 3.4rem);
  }

  .btn-group {
    position: fixed;
    width: max-content;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(-50%, 0);
    bottom: calc(env(safe-area-inset-bottom, 0px) + 88px);
    z-index: 4;
  }

  .btn-group .btn {
    width: 54px;
    height: 54px;
    margin: 8px;
  }

  .carousel-progress {
    width: min(88vw, 660px);
    gap: 0.75rem;
    bottom: max(6px, env(safe-area-inset-bottom, 0px));
  }

  .scroll-hint {
    display: flex;
  }

  .carousel-progress-track {
    height: 8px;
  }

  .carousel-progress-text {
    min-width: 68px;
    font-size: 1.2rem;
  }

  .hero-shell {
    min-height: max(92svh, 640px);
  }

  #banner .img-wrapper {
    scroll-snap-type: x proximity;
  }

  .desktop-support {
    display: none;
  }

  .mobile-support {
    display: block;
    margin-top: 1.75rem;
    margin-bottom: 8vh;
    padding: 2rem 1.5rem;
  }

  .mobile-support .support-title {
    margin-top: 2.4rem;
  }

  .desktop-support [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .support-title {
    font-size: clamp(3.8rem, 12vw, 7.6rem);
    margin-bottom: 1rem;
  }

  .support-title-image {
    width: min(92vw, 760px);
  }

  .support-copy p {
    font-size: clamp(1.08rem, 3.25vw, 1.38rem);
    line-height: 1.8;
  }

  .snow-toggle {
    width: 40px;
    height: 40px;
    top: max(10px, env(safe-area-inset-top, 0px));
    right: max(10px, env(safe-area-inset-right, 0px));
  }
}

@media (max-width: 480px) {
  :root {
    --post-spacing: 2vw;
    --post-size: 72vw;
    --mask-size: 240vw;
  }

  #banner {
    top: 18%;
  }

  .hero-shell {
    min-height: max(90svh, 580px);
  }

  .mobile-support {
    width: 94vw;
    padding: 1.8rem 1.2rem;
    margin-bottom: 7vh;
  }
}

@keyframes admission {
  0% {
    transform: translate(140vw, 0);
  }
  100% {
    transform: translate(13.39vw, 0);
  }
}