:root {
  --paper: #f5efe2;
  --muted: rgba(245, 239, 226, 0.72);
  --quiet: rgba(245, 239, 226, 0.5);
  --gold: #d6b36a;
  --soft-gold: #b99755;
  --steel: #9bb8ce;
  --smoke: rgba(13, 20, 29, 0.68);
  --deep: #06101d;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  display: grid;
  min-height: 100dvh;
  place-items: center;
  overflow: hidden;
  background: #05080d;
  color: var(--paper);
  font-family: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", system-ui, sans-serif;
}

.stage {
  position: relative;
  width: 100vw;
  height: 100dvh;
  min-width: 320px;
  min-height: 240px;
  overflow: hidden;
  isolation: isolate;
  background: var(--deep);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -4;
  background-image: url("home.jpg");
  background-position: center 47%;
  background-size: cover;
  filter: saturate(0.78) contrast(1.08) brightness(0.84);
  transform: scale(1.025);
  animation: imageBreath 18s ease-in-out infinite;
}

.living-light {
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(102deg, transparent 0%, transparent 44%, rgba(219, 190, 128, 0.16) 49%, rgba(244, 229, 189, 0.1) 51%, transparent 57%, transparent 100%),
    radial-gradient(circle at 50% 57%, rgba(214, 179, 106, 0.12), transparent 17%);
  mix-blend-mode: screen;
  opacity: 0.72;
  transform: translateX(-28%);
  animation: facadeSweep 14s ease-in-out infinite;
}

.particle-field {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.particle-field span {
  position: absolute;
  --rise: -230px;
  --sway: 22px;
  --float-time: 10.8s;
  --sway-time: 5.4s;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  opacity: 0;
  animation: particleRise var(--float-time) linear infinite;
}

.particle-field span::before {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  content: "";
  background:
    radial-gradient(circle at 42% 38%, rgba(255, 252, 231, 1) 0 14%, rgba(255, 224, 152, 0.95) 22%, rgba(214, 179, 106, 0.28) 48%, rgba(214, 179, 106, 0) 72%);
  box-shadow: 0 0 12px rgba(255, 234, 185, 0.72), 0 0 34px rgba(214, 179, 106, 0.42);
  filter: blur(0.15px);
  animation: particleSway var(--sway-time) ease-in-out infinite alternate;
}

.particle-field span:nth-child(1) {
  left: 20%;
  top: 76%;
  --rise: -215px;
  --sway: 18px;
  --float-time: 10.6s;
  --sway-time: 5.8s;
  animation-delay: 0s;
}

.particle-field span:nth-child(2) {
  left: 28%;
  top: 74%;
  width: 5px;
  height: 5px;
  --rise: -240px;
  --sway: -24px;
  --float-time: 11.4s;
  --sway-time: 6.4s;
  animation-delay: 1.4s;
}

.particle-field span:nth-child(3) {
  left: 35%;
  top: 77%;
  --rise: -225px;
  --sway: 26px;
  --float-time: 10.9s;
  --sway-time: 5.1s;
  animation-delay: 2.6s;
}

.particle-field span:nth-child(4) {
  left: 43%;
  top: 75%;
  width: 5px;
  height: 5px;
  --rise: -248px;
  --sway: -20px;
  --float-time: 12s;
  --sway-time: 6.1s;
  animation-delay: 4.1s;
}

.particle-field span:nth-child(5) {
  left: 51%;
  top: 78%;
  --rise: -218px;
  --sway: 16px;
  --float-time: 10.2s;
  --sway-time: 4.9s;
  animation-delay: 5.2s;
}

.particle-field span:nth-child(6) {
  left: 58%;
  top: 73%;
  width: 9px;
  height: 9px;
  --rise: -255px;
  --sway: -26px;
  --float-time: 12.4s;
  --sway-time: 6.8s;
  animation-delay: 6.3s;
}

.particle-field span:nth-child(7) {
  left: 65%;
  top: 76%;
  width: 5px;
  height: 5px;
  --rise: -232px;
  --sway: 22px;
  --float-time: 11.1s;
  --sway-time: 5.6s;
  animation-delay: 7.1s;
}

.particle-field span:nth-child(8) {
  left: 73%;
  top: 74%;
  --rise: -246px;
  --sway: -18px;
  --float-time: 12.8s;
  --sway-time: 6.3s;
  animation-delay: 8s;
}

.particle-field span:nth-child(9) {
  left: 82%;
  top: 77%;
  width: 5px;
  height: 5px;
  --rise: -226px;
  --sway: 20px;
  --float-time: 10.8s;
  --sway-time: 5.3s;
  animation-delay: 0.7s;
}

.particle-field span:nth-child(10) {
  left: 24%;
  top: 80%;
  --rise: -238px;
  --sway: -28px;
  --float-time: 11.8s;
  --sway-time: 6.7s;
  animation-delay: 2.1s;
}

.particle-field span:nth-child(11) {
  left: 47%;
  top: 81%;
  width: 8px;
  height: 8px;
  --rise: -260px;
  --sway: 24px;
  --float-time: 12.2s;
  --sway-time: 5.9s;
  animation-delay: 3.4s;
}

.particle-field span:nth-child(12) {
  left: 70%;
  top: 79%;
  width: 5px;
  height: 5px;
  --rise: -222px;
  --sway: -22px;
  --float-time: 10.4s;
  --sway-time: 5.7s;
  animation-delay: 4.8s;
}

.particle-field span:nth-child(13) {
  left: 56%;
  top: 82%;
  --rise: -242px;
  --sway: 30px;
  --float-time: 12.6s;
  --sway-time: 6.5s;
  animation-delay: 6s;
}

.particle-field span:nth-child(14) {
  left: 37%;
  top: 82%;
  width: 5px;
  height: 5px;
  --rise: -228px;
  --sway: -18px;
  --float-time: 11.3s;
  --sway-time: 5.2s;
  animation-delay: 7.5s;
}

.atmosphere {
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(3, 7, 11, 0.9) 0%, rgba(3, 7, 11, 0.36) 39%, rgba(3, 7, 11, 0.36) 63%, rgba(3, 7, 11, 0.88) 100%),
    linear-gradient(180deg, rgba(4, 8, 13, 0.62) 0%, rgba(4, 8, 13, 0.1) 34%, rgba(4, 8, 13, 0.92) 100%),
  radial-gradient(circle at 54% 32%, rgba(214, 179, 106, 0.1), transparent 34%);
}

.architecture-grid {
  position: absolute;
  inset: 0;
  z-index: -2;
  border: 0;
  pointer-events: none;
  display: none;
}

.architecture-grid::before,
.architecture-grid::after {
  position: absolute;
  content: "";
  opacity: 0.42;
}

.architecture-grid::before {
  top: 0;
  bottom: 0;
  left: 38.4%;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(180, 210, 230, 0.65), transparent);
}

.architecture-grid::after {
  right: 0;
  bottom: 18.4%;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(214, 179, 106, 0.65), transparent);
}

@keyframes imageBreath {
  0%,
  100% {
    filter: saturate(0.78) contrast(1.08) brightness(0.82);
    transform: scale(1.025);
  }

  50% {
    filter: saturate(0.84) contrast(1.1) brightness(0.9);
    transform: scale(1.04);
  }
}

@keyframes facadeSweep {
  0%,
  18% {
    opacity: 0;
    transform: translateX(-36%);
  }

  48% {
    opacity: 0.52;
  }

  78%,
  100% {
    opacity: 0;
    transform: translateX(34%);
  }
}

@keyframes particleRise {
  0% {
    opacity: 0;
    transform: translate3d(0, 12px, 0) scale(0.58);
  }

  18% {
    opacity: 0.96;
  }

  48% {
    opacity: 0.82;
  }

  76% {
    opacity: 0.34;
  }

  100% {
    opacity: 0;
    transform: translate3d(0, var(--rise), 0) scale(1.2);
  }
}

@keyframes particleSway {
  0% {
    transform: translate3d(calc(var(--sway) * -0.4), 0, 0);
  }

  50% {
    transform: translate3d(var(--sway), -6px, 0);
  }

  100% {
    transform: translate3d(calc(var(--sway) * -0.75), 0, 0);
  }
}

.hero-copy {
  position: absolute;
  top: 13.8%;
  left: 3.2%;
  width: 43%;
  min-width: 360px;
}

.kicker {
  margin: 0 0 18px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  color: #fffaf0;
  font-family: "Noto Serif TC", "Source Han Serif TC", "PMingLiU", serif;
  font-size: clamp(54px, 7.4vw, 88px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: 0;
  text-shadow: 0 12px 34px rgba(0, 0, 0, 0.6);
}

.lead {
  width: max-content;
  max-width: min(92vw, 900px);
  margin: 20px 0 0;
  color: rgba(245, 239, 226, 0.82);
  font-size: clamp(16px, 1.55vw, 19px);
  font-weight: 400;
  line-height: 1.75;
}

.lead span {
  display: block;
  white-space: nowrap;
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.meta-strip span {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  border: 1px solid rgba(214, 179, 106, 0.28);
  border-radius: 999px;
  padding: 0 15px;
  color: rgba(245, 239, 226, 0.72);
  background: rgba(6, 16, 29, 0.4);
  font-size: clamp(14px, 1vw, 17px);
  backdrop-filter: blur(12px);
}

.theme-nav {
  position: absolute;
  right: 2.4%;
  bottom: 5.6%;
  left: 2.4%;
  display: grid;
  width: auto;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0;
  overflow: hidden;
  border: 1px solid rgba(214, 179, 106, 0.28);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(8, 13, 19, 0.72);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
}

.theme-link {
  position: relative;
  display: grid;
  min-height: 136px;
  grid-template-columns: 1fr;
  grid-template-rows: 20px 1fr auto auto;
  align-content: stretch;
  justify-items: start;
  overflow: hidden;
  border: 0;
  border-right: 1px solid rgba(214, 179, 106, 0.18);
  border-radius: 0;
  padding: 18px 14px 16px;
  color: var(--paper);
  text-decoration: none;
  background: transparent;
  box-shadow: none;
  transition: background 220ms ease, color 220ms ease;
}

.theme-link::before {
  position: absolute;
  right: 18px;
  bottom: 16px;
  left: 18px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--soft-gold), transparent);
  opacity: 0;
}

.theme-link::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, rgba(214, 179, 106, 0.12), transparent 58%);
  opacity: 0;
  transition: opacity 220ms ease;
}

.theme-link:focus-visible,
.theme-link:hover {
  background: rgba(214, 179, 106, 0.08);
  color: #fff7e6;
  outline: none;
}

.theme-link:focus-visible::after,
.theme-link:hover::after {
  opacity: 1;
}

.theme-number {
  position: relative;
  z-index: 1;
  grid-row: 1;
  align-self: start;
  color: rgba(214, 179, 106, 0.52);
  font-family: Georgia, serif;
  font-size: 18px;
  line-height: 1;
}

.theme-icon {
  position: absolute;
  top: 16px;
  right: 16px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(214, 179, 106, 0.34);
  border-radius: 50%;
  color: rgba(245, 239, 226, 0.68);
  background: rgba(0, 0, 0, 0.14);
}

.theme-icon svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.theme-title {
  position: relative;
  z-index: 1;
  grid-row: 3;
  align-self: end;
  color: #fff7e7;
  font-size: clamp(22px, 2vw, 29px);
  font-weight: 650;
  line-height: 1.08;
  margin-top: 0;
}

.theme-note {
  position: relative;
  z-index: 1;
  grid-row: 4;
  align-self: start;
  margin-top: 7px;
  margin-bottom: 13px;
  color: rgba(245, 239, 226, 0.58);
  font-size: 13px;
  line-height: 1.3;
}

.theme-link:last-child {
  border-right: 0;
}

.tech-ornament {
  position: absolute;
  right: 2.8%;
  bottom: 2.8%;
  left: 2.8%;
  display: flex;
  height: 18px;
  align-items: center;
  justify-content: center;
  gap: 13px;
  pointer-events: none;
}

.ornament-line {
  width: min(23vw, 230px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(214, 179, 106, 0.36));
}

.ornament-line:last-child {
  background: linear-gradient(90deg, rgba(214, 179, 106, 0.36), transparent);
}

.ornament-node {
  position: relative;
  width: 8px;
  height: 8px;
  border: 1px solid rgba(214, 179, 106, 0.62);
  border-radius: 50%;
  box-shadow: 0 0 18px rgba(214, 179, 106, 0.24);
}

.ornament-node::before,
.ornament-node::after {
  position: absolute;
  top: 50%;
  width: 26px;
  height: 1px;
  content: "";
  background: rgba(214, 179, 106, 0.18);
}

.ornament-node::before {
  right: 12px;
}

.ornament-node::after {
  left: 12px;
}

.page-transition {
  position: absolute;
  inset: 0;
  z-index: 30;
  background: #05080d;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
}

.page-transition.is-active {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .hero-bg,
  .living-light,
  .particle-field span {
    animation: none;
  }
}

@media (max-width: 760px) {
  body {
    overflow: auto;
  }

  .stage {
    width: 100vw;
    height: max(100dvh, 760px);
  }

  .hero-copy {
    top: 14%;
    min-width: 0;
    width: 82%;
  }

  .lead {
    width: min(100%, 520px);
    max-width: 100%;
  }

  .lead span {
    white-space: normal;
  }

  .theme-nav {
    right: 7%;
    bottom: 8%;
    left: 7%;
    width: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .theme-link {
    border-right: 1px solid rgba(214, 179, 106, 0.18);
    border-bottom: 1px solid rgba(214, 179, 106, 0.18);
  }

  .theme-link:nth-child(2n) {
    border-right: 0;
  }

  .theme-link:last-child {
    border-bottom: 0;
  }

  .theme-link:nth-last-child(2) {
    border-bottom: 0;
  }
}