:root {
  --bg: #000000;
  --gold: #d6a85d;
  --gold-bright: #ffd98a;
  --text: #f4d7a4;
  --logo-tone-filter: brightness(1) saturate(1);
  --symbol-shadow: 0 0 16px rgba(214, 168, 93, 0.1);
  --wordmark-shadow: 0 0 20px rgba(214, 168, 93, 0.11);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --canvas-appear-duration: 1100ms;
  --canvas-fade-duration: 9000ms;
  --canvas-opacity-duration: var(--canvas-appear-duration);
  --canvas-fade-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --canvas-active-opacity: 0.78;
  --canvas-grid-line-strong: rgba(255, 217, 138, 0.34);
  --canvas-grid-line-soft: rgba(255, 217, 138, 0.26);
  --canvas-dot-color: rgba(255, 217, 138, 0.68);
  --canvas-dot-size: 1px;
  --canvas-dot-fade: 1.6px;
  --drag-x: 0px;
  --drag-y: 0px;
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --push-x: 0px;
  --push-y: 0px;
  --canvas-mask-x: 50vw;
  --canvas-mask-y: 50vh;
  --canvas-opacity: 0;
  --canvas-cell: 42px;
  --canvas-origin-x: 0px;
  --canvas-origin-y: 0px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: Avenir Next, Helvetica Neue, Arial, PingFang SC, Hiragino Sans GB, Microsoft YaHei, sans-serif;
  transition: color 900ms var(--ease), background-color 900ms var(--ease);
}

body {
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  transition: background-color 900ms var(--ease);
}

.site-shell {
  position: relative;
  min-height: 100dvh;
  overflow: hidden;
  isolation: isolate;
  background: var(--bg);
  transition: background-color 900ms var(--ease), filter 720ms var(--ease);
}

.site-shell::before {
  position: fixed;
  inset: 0;
  z-index: 12;
  content: "";
  pointer-events: none;
  background: transparent;
  mix-blend-mode: normal;
  opacity: 0;
  transition: opacity 1100ms var(--ease);
  will-change: opacity;
}

.canvas-reveal {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  mask-image: radial-gradient(circle at var(--canvas-mask-x) var(--canvas-mask-y), #000 0, #000 7rem, rgba(0, 0, 0, 0.58) 12rem, transparent 19rem);
  -webkit-mask-image: radial-gradient(circle at var(--canvas-mask-x) var(--canvas-mask-y), #000 0, #000 7rem, rgba(0, 0, 0, 0.58) 12rem, transparent 19rem);
  mix-blend-mode: screen;
  opacity: var(--canvas-opacity);
  transform: translate3d(calc(var(--push-x) * -0.35), calc(var(--push-y) * -0.35), 0);
  transition: opacity var(--canvas-opacity-duration) var(--canvas-fade-ease);
  will-change: opacity, transform, mask-image;
}

.canvas-pattern {
  position: absolute;
  inset: 0;
  background-repeat: repeat;
  filter: brightness(1) saturate(1);
  animation: canvasAmbientShift 9s ease-in-out infinite alternate;
  will-change: opacity, filter;
}

.canvas-pattern--grid {
  background:
    repeating-linear-gradient(0deg, var(--canvas-grid-line-strong) 0 1px, transparent 1px var(--canvas-cell)),
    repeating-linear-gradient(90deg, var(--canvas-grid-line-soft) 0 1px, transparent 1px var(--canvas-cell));
  background-size: var(--canvas-cell) var(--canvas-cell), var(--canvas-cell) var(--canvas-cell);
  background-position: var(--canvas-origin-x) var(--canvas-origin-y), var(--canvas-origin-x) var(--canvas-origin-y);
  animation:
    canvasAmbientShift 9s ease-in-out infinite alternate,
    canvasGridFade 10s ease-in-out infinite;
}

.canvas-pattern--dots {
  background:
    radial-gradient(circle at 0 0, var(--canvas-dot-color) var(--canvas-dot-size), transparent var(--canvas-dot-fade));
  background-size: var(--canvas-cell) var(--canvas-cell);
  background-position: var(--canvas-origin-x) var(--canvas-origin-y);
  animation:
    canvasAmbientShift 9s ease-in-out infinite alternate,
    canvasDotsFade 10s ease-in-out infinite;
}

@keyframes canvasGridFade {
  0%, 34% {
    opacity: 1;
  }

  50%, 84% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

@keyframes canvasDotsFade {
  0%, 34% {
    opacity: 0;
  }

  50%, 84% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

@keyframes canvasAmbientShift {
  0% {
    filter: brightness(0.9) saturate(0.96);
  }

  100% {
    filter: brightness(1.08) saturate(1.08);
  }
}

.site-shell.is-dragging {
  cursor: grabbing;
  filter: saturate(1.05);
}

.site-header {
  position: fixed;
  top: clamp(1rem, 2.4vw, 1.85rem);
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  height: auto;
  padding: 0 1rem;
  color: var(--text);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 54px;
  padding: 5px 8px;
  color: rgba(244, 215, 164, 0.9);
  white-space: nowrap;
  border: 1px solid rgba(255, 217, 138, 0.18);
  border-radius: 999px;
  background: rgba(10, 7, 3, 0.42);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  box-shadow:
    inset 0 1px 0 rgba(255, 237, 194, 0.15),
    0 18px 46px rgba(0, 0, 0, 0.48);
  transition: color 720ms var(--ease), border-color 720ms var(--ease), background 720ms var(--ease), box-shadow 720ms var(--ease);
}

.theme-toggle {
  position: fixed;
  top: clamp(1rem, 2.4vw, 1.85rem);
  right: clamp(1.25rem, 4vw, 3rem);
  z-index: 21;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.48rem;
  min-height: 42px;
  padding: 0 13px 0 11px;
  color: rgba(244, 215, 164, 0.88);
  font: inherit;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  border: 1px solid rgba(255, 217, 138, 0.16);
  border-radius: 999px;
  background: rgba(10, 7, 3, 0.38);
  box-shadow:
    inset 0 1px 0 rgba(255, 237, 194, 0.13),
    0 14px 38px rgba(0, 0, 0, 0.36);
  backdrop-filter: blur(20px) saturate(145%);
  -webkit-backdrop-filter: blur(20px) saturate(145%);
  cursor: pointer;
  transition: color 720ms var(--ease), border-color 720ms var(--ease), background 720ms var(--ease), box-shadow 720ms var(--ease), transform 320ms var(--ease);
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: #fff0bd;
  border-color: rgba(255, 217, 138, 0.26);
  background: rgba(255, 217, 138, 0.08);
  transform: translateY(-1px);
}

.theme-toggle__orb {
  position: relative;
  width: 14px;
  height: 14px;
  border: 1px solid currentColor;
  border-radius: 50%;
  box-shadow: inset -4px -2px 0 rgba(244, 215, 164, 0.42), 0 0 12px rgba(214, 168, 93, 0.14);
}

.theme-toggle__text {
  transform: translateY(0.5px);
}

.main-nav a {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-width: clamp(48px, 4.2vw, 58px);
  min-height: 42px;
  padding: 8px 10px;
  color: inherit;
  line-height: 1;
  text-decoration: none;
  border-radius: 999px;
  transition: color 320ms var(--ease), background 320ms var(--ease), box-shadow 320ms var(--ease), transform 320ms var(--ease);
}

.nav-icon {
  width: 22px;
  height: 22px;
  color: #ffe7b6;
  opacity: 0.96;
  filter: drop-shadow(0 0 8px rgba(255, 217, 138, 0.2));
}

.nav-icon path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.45;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.nav-note {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  display: block;
  min-width: 44px;
  padding: 6px 8px;
  color: rgba(244, 215, 164, 0.78);
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.22em;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  pointer-events: none;
  border: 1px solid rgba(255, 217, 138, 0.16);
  border-radius: 999px;
  background: rgba(7, 5, 2, 0.72);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 237, 194, 0.12);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  opacity: 0;
  transform: translate(-50%, -4px);
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
}

.main-nav a::after {
  position: absolute;
  left: 24%;
  right: 24%;
  bottom: 0.28rem;
  height: 1px;
  content: "";
  background: var(--gold-bright);
  transform: scaleX(0);
  transform-origin: center;
  opacity: 0.78;
  transition: transform 320ms var(--ease);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: #fff0bd;
  background: rgba(255, 217, 138, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 237, 194, 0.08);
  transform: translateY(-1px);
}

.main-nav a:hover .nav-note,
.main-nav a:focus .nav-note,
.main-nav a:focus-visible .nav-note {
  color: rgba(255, 240, 189, 0.9);
  opacity: 0.88;
  transform: translate(-50%, 0);
}

.main-nav a:hover .nav-icon,
.main-nav a:focus-visible .nav-icon {
  opacity: 1;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  z-index: 2;
  min-height: 100dvh;
  overflow: hidden;
}

.logo-hero {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: clamp(7rem, 12vh, 9rem) 0 5rem;
}

.logo-stage {
  position: relative;
  display: grid;
  place-items: center;
  width: min(92vw, 70rem);
  min-height: min(72dvh, 45rem);
  cursor: grab;
  perspective: 1000px;
}

.logo-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(2.4rem, 5vw, 4rem);
  width: 100%;
  user-select: none;
  transform:
    translate3d(var(--drag-x), var(--drag-y), 0)
    rotateX(var(--tilt-x))
    rotateY(var(--tilt-y));
  transform-origin: 50% 52%;
  transition: filter 840ms var(--ease), opacity 840ms var(--ease);
}

.logo-symbol,
.logo-wordmark {
  display: block;
  height: auto;
  object-fit: contain;
  -webkit-user-drag: none;
  user-select: none;
}

.logo-symbol {
  width: clamp(9rem, 16vw, 15rem);
  max-width: 42vw;
  filter: var(--logo-tone-filter) drop-shadow(var(--symbol-shadow));
  transition: filter 900ms var(--ease), opacity 900ms var(--ease);
}

.logo-wordmark {
  width: clamp(20rem, 42vw, 45rem);
  max-width: 82vw;
  filter: var(--logo-tone-filter) drop-shadow(var(--wordmark-shadow));
  transition: filter 900ms var(--ease), opacity 900ms var(--ease);
}

.site-shell.is-dragging .logo-stack {
  filter: drop-shadow(0 0 24px rgba(214, 168, 93, 0.16));
}


html[data-theme="light"] {
  --bg: #ffffff;
  --gold: #111111;
  --gold-bright: #000000;
  --text: #111111;
  --canvas-active-opacity: 0.72;
  --canvas-grid-line-strong: rgba(17, 17, 17, 0.16);
  --canvas-grid-line-soft: rgba(17, 17, 17, 0.12);
  --canvas-dot-color: rgba(17, 17, 17, 0.46);
  --canvas-dot-size: 1.35px;
  --canvas-dot-fade: 2.15px;
  --logo-tone-filter: brightness(0) saturate(1);
  --symbol-shadow: 0 0 13px rgba(0, 0, 0, 0.08);
  --wordmark-shadow: 0 0 16px rgba(0, 0, 0, 0.07);
}

html[data-theme="light"] .site-shell::before {
  background: transparent;
  mix-blend-mode: normal;
  opacity: 0;
}

html[data-theme="light"] .canvas-reveal {
  mix-blend-mode: multiply;
  filter: brightness(0) saturate(1);
}

html[data-theme="light"] .main-nav {
  color: rgba(17, 17, 17, 0.82);
  border-color: rgba(17, 17, 17, 0.12);
  background: rgba(255, 255, 255, 0.66);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 18px 46px rgba(0, 0, 0, 0.11);
}

html[data-theme="light"] .nav-icon {
  color: #111111;
  filter: drop-shadow(0 0 8px rgba(0, 0, 0, 0.08));
}

html[data-theme="light"] .nav-note {
  color: rgba(17, 17, 17, 0.7);
  border-color: rgba(17, 17, 17, 0.1);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.86);
}

html[data-theme="light"] .main-nav a:hover,
html[data-theme="light"] .main-nav a:focus-visible {
  color: #000000;
  background: rgba(17, 17, 17, 0.055);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

html[data-theme="light"] .main-nav a:hover .nav-note,
html[data-theme="light"] .main-nav a:focus .nav-note,
html[data-theme="light"] .main-nav a:focus-visible .nav-note {
  color: rgba(0, 0, 0, 0.86);
}

html[data-theme="light"] .theme-toggle {
  color: rgba(17, 17, 17, 0.82);
  border-color: rgba(17, 17, 17, 0.12);
  background: rgba(255, 255, 255, 0.68);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 14px 38px rgba(0, 0, 0, 0.1);
}

html[data-theme="light"] .theme-toggle:hover,
html[data-theme="light"] .theme-toggle:focus-visible {
  color: #000000;
  border-color: rgba(17, 17, 17, 0.2);
  background: rgba(17, 17, 17, 0.055);
}

html[data-theme="light"] .theme-toggle__orb {
  box-shadow: inset 0 0 0 4px currentColor, 0 0 12px rgba(0, 0, 0, 0.08);
}

html[data-theme="light"] .site-shell.is-dragging .logo-stack {
  filter: drop-shadow(0 0 20px rgba(0, 0, 0, 0.1));
}

@media (max-width: 760px) {
  .site-header {
    top: 0.85rem;
    padding: 0 0.8rem;
  }

  .theme-toggle {
    top: 4.85rem;
    right: 0.9rem;
    min-height: 38px;
    padding: 0 10px;
  }

  .theme-toggle__text {
    display: none;
  }

  .main-nav {
    width: min(100%, 22.5rem);
    min-height: 52px;
    gap: 3px;
    padding: 5px;
  }

  .main-nav a {
    flex: 1;
    min-width: 0;
    min-height: 42px;
    padding: 6px 8px 7px;
  }

  .nav-icon {
    width: 20px;
    height: 20px;
  }

  .nav-note {
    font-size: 9px;
    letter-spacing: 0.16em;
  }

  .logo-hero {
    padding: 6.4rem 0 4rem;
  }

  .logo-stage {
    width: 100%;
    min-height: 68dvh;
  }

  .logo-stack {
    width: 100%;
    gap: clamp(1.8rem, 7vw, 2.8rem);
  }

  .logo-symbol {
    width: clamp(6.6rem, 31vw, 8.2rem);
    max-width: 42vw;
  }

  .logo-wordmark {
    width: min(78vw, 21rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .logo-stack {
    transform: none !important;
  }

  .site-shell::before {
    display: none;
  }

  .site-shell::after,
  .canvas-reveal {
    display: none;
  }
}

.nav-item--account {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-width: clamp(48px, 4.2vw, 58px);
  min-height: 42px;
  padding: 8px 10px;
  color: inherit;
  font: inherit;
  line-height: 1;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: color 320ms var(--ease), background 320ms var(--ease), box-shadow 320ms var(--ease), transform 320ms var(--ease);
}

.nav-item--account::after {
  position: absolute;
  left: 24%;
  right: 24%;
  bottom: 0.28rem;
  height: 1px;
  content: "";
  background: var(--gold-bright);
  transform: scaleX(0);
  transform-origin: center;
  opacity: 0.78;
  transition: transform 320ms var(--ease);
}

.nav-item--account:hover,
.nav-item--account:focus-visible {
  color: #fff0bd;
  background: rgba(255, 217, 138, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 237, 194, 0.08);
  transform: translateY(-1px);
}

.nav-item--account:hover .nav-note,
.nav-item--account:focus .nav-note,
.nav-item--account:focus-visible .nav-note {
  color: rgba(255, 240, 189, 0.9);
  opacity: 0.88;
  transform: translate(-50%, 0);
}

.nav-item--account:hover .nav-icon,
.nav-item--account:focus-visible .nav-icon {
  opacity: 1;
}

.nav-item--account:hover::after,
.nav-item--account:focus-visible::after {
  transform: scaleX(1);
}

.account-panel {
  position: fixed;
  z-index: 30;
  top: clamp(4.7rem, 7vw, 5.8rem);
  left: 50%;
  width: min(20rem, calc(100vw - 2rem));
  display: grid;
  gap: 12px;
  padding: 14px;
  color: rgba(244, 215, 164, 0.92);
  border: 1px solid rgba(255, 217, 138, 0.18);
  border-radius: 24px;
  background: rgba(8, 6, 3, 0.78);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 237, 194, 0.12);
  backdrop-filter: blur(24px) saturate(155%);
  -webkit-backdrop-filter: blur(24px) saturate(155%);
  transform: translateX(-50%);
}

.account-panel[hidden] {
  display: none;
}

.account-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.account-panel__head strong {
  font-size: 14px;
  font-weight: 520;
  letter-spacing: 0.08em;
}

.account-panel__close,
.account-logout,
.account-form button {
  border: 1px solid rgba(255, 217, 138, 0.18);
  border-radius: 999px;
  color: inherit;
  background: rgba(255, 217, 138, 0.08);
  cursor: pointer;
}

.account-panel__close {
  width: 30px;
  height: 30px;
  padding: 0;
  font-size: 18px;
}

.account-status {
  margin: 0;
  color: rgba(244, 215, 164, 0.66);
  font-size: 12px;
  line-height: 1.55;
}

.account-form {
  display: grid;
  gap: 10px;
}

.account-form label {
  display: grid;
  gap: 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.account-form input {
  min-height: 40px;
  border: 1px solid rgba(255, 217, 138, 0.15);
  border-radius: 16px;
  padding: 0 12px;
  color: #fff4d4;
  background: rgba(0, 0, 0, 0.22);
  outline: none;
}

.account-form input:focus {
  border-color: rgba(255, 217, 138, 0.34);
  box-shadow: 0 0 0 3px rgba(214, 168, 93, 0.14);
}

.account-form button,
.account-logout {
  min-height: 40px;
  padding: 0 14px;
  font-size: 12px;
  letter-spacing: 0.12em;
}

html[data-theme="light"] .nav-item--account:hover,
html[data-theme="light"] .nav-item--account:focus-visible {
  color: #000000;
  background: rgba(17, 17, 17, 0.055);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

html[data-theme="light"] .nav-item--account:hover .nav-note,
html[data-theme="light"] .nav-item--account:focus .nav-note,
html[data-theme="light"] .nav-item--account:focus-visible .nav-note {
  color: rgba(0, 0, 0, 0.86);
}

html[data-theme="light"] .account-panel {
  color: rgba(17, 17, 17, 0.86);
  border-color: rgba(17, 17, 17, 0.12);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.86);
}

html[data-theme="light"] .account-status {
  color: rgba(17, 17, 17, 0.58);
}

html[data-theme="light"] .account-form input {
  color: #050505;
  border-color: rgba(17, 17, 17, 0.12);
  background: rgba(255, 255, 255, 0.62);
}

@media (max-width: 760px) {
  .main-nav .nav-item--account {
    flex: 1;
    min-width: 0;
    min-height: 42px;
    padding: 6px 8px 7px;
  }

  .account-panel {
    top: 4.35rem;
  }
}