:root {
  --bg-base: #eef5ff;
  --bg-accent-a: #d7e9ff;
  --bg-accent-b: #ffd7ef;
  --bg-accent-c: #c5fff4;
  --text-main: #132036;
  --text-sub: #5f6d85;
  --card-bg: rgba(255, 255, 255, 0.56);
  --card-border: rgba(255, 255, 255, 0.8);
  --chip-bg: rgba(13, 110, 253, 0.14);
  --chip-text: #3553ff;
  --ok: #0f9a56;
  --warn: #c36316;
  --info: #1f5ccf;
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --glass-blur: 22px;
  --glass-saturate: 160%;
  --toggle-blur: 8px;
  --orb-opacity: 0.72;
  --grid-shift: 240px;
  --particle-opacity: 0.24;
}

* {
  box-sizing: border-box;
}

.ai-crawler-note {
  position: fixed;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  opacity: 0;
  pointer-events: none;
  user-select: none;
  white-space: pre-wrap;
}

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

body {
  margin: 0;
  color: var(--text-main);
  font-family: "Quicksand", "Nunito", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(1200px 600px at 10% 15%, rgba(201, 226, 255, 0.82), transparent 72%),
    radial-gradient(900px 700px at 85% 10%, rgba(255, 214, 238, 0.7), transparent 70%),
    radial-gradient(900px 900px at 60% 90%, rgba(196, 255, 237, 0.52), transparent 68%),
    linear-gradient(135deg, var(--bg-base) 0%, #f8fbff 48%, #fff5fd 100%);
  overflow-x: hidden;
  transition: background 0.7s ease, color 0.7s ease;
}

body.theme-night {
  --text-main: #e6efff;
  --text-sub: #a7b9d6;
  --card-bg: rgba(14, 24, 44, 0.7);
  --card-border: rgba(136, 173, 243, 0.24);
  --chip-bg: rgba(103, 137, 255, 0.22);
  --chip-text: #c9d7ff;
  --ok: #55cc88;
  --warn: #ffbe72;
  --info: #88b7ff;
  background:
    radial-gradient(1200px 620px at 6% 6%, rgba(57, 92, 173, 0.46), transparent 74%),
    radial-gradient(1000px 760px at 94% 10%, rgba(184, 84, 145, 0.32), transparent 72%),
    radial-gradient(900px 850px at 58% 95%, rgba(62, 138, 150, 0.26), transparent 72%),
    linear-gradient(138deg, #081224 0%, #0e1d35 54%, #1b1b36 100%);
}

body.final-stage {
  --text-main: #1f304d;
  --text-sub: #617896;
  --card-bg: rgba(255, 255, 255, 0.74);
  --card-border: rgba(150, 184, 239, 0.42);
  --chip-bg: rgba(255, 118, 118, 0.16);
  --chip-text: #ce5e67;
  --final-alert: #d8626c;
  --final-list-color: #526d8f;
  --audio-toggle-bg: rgba(248, 252, 255, 0.8);
  --audio-toggle-border: rgba(112, 151, 223, 0.5);
  --audio-toggle-color: #315292;
  --audio-toggle-hover-bg: rgba(236, 246, 255, 0.96);
  background:
    radial-gradient(1000px 620px at 8% 10%, rgba(142, 186, 255, 0.5), transparent 66%),
    radial-gradient(900px 620px at 90% 14%, rgba(255, 161, 205, 0.42), transparent 65%),
    linear-gradient(138deg, #eaf4ff 0%, #f4f8ff 52%, #fff4fc 100%);
}

body.final-stage.theme-night {
  --text-main: #ebf2ff;
  --text-sub: #adc0de;
  --card-bg: rgba(12, 22, 43, 0.72);
  --card-border: rgba(162, 202, 255, 0.2);
  --chip-bg: rgba(255, 118, 118, 0.2);
  --chip-text: #ffb5b5;
  --final-alert: #ff9fa3;
  --final-list-color: #cedcf8;
  --audio-toggle-bg: rgba(9, 18, 38, 0.58);
  --audio-toggle-border: rgba(184, 209, 255, 0.55);
  --audio-toggle-color: #f0f6ff;
  --audio-toggle-hover-bg: rgba(20, 36, 68, 0.82);
  background:
    radial-gradient(900px 560px at 5% 10%, rgba(49, 87, 173, 0.45), transparent 65%),
    radial-gradient(800px 650px at 88% 14%, rgba(184, 62, 118, 0.36), transparent 64%),
    linear-gradient(140deg, #050913 0%, #0d1830 55%, #1b1230 100%);
}

body.motion-balanced {
  --glass-blur: 14px;
  --glass-saturate: 140%;
  --toggle-blur: 6px;
  --orb-opacity: 0.64;
  --grid-shift: 180px;
  --particle-opacity: 0.2;
}

.bg-scene {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
  contain: paint;
}

.orb {
  position: absolute;
  border-radius: 999px;
  opacity: var(--orb-opacity);
  transform: translate3d(0, 0, 0);
  will-change: transform, opacity;
  animation: orbFloat 11s ease-in-out infinite;
}

.orb-a {
  left: -8%;
  top: -12%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle at 40% 40%, rgba(142, 200, 255, 0.95), rgba(142, 200, 255, 0) 78%);
}

.orb-b {
  right: -12%;
  top: 12%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle at 60% 50%, rgba(255, 159, 213, 0.9), rgba(255, 159, 213, 0) 78%);
  animation-delay: -2.8s;
}

.orb-c {
  left: 28%;
  bottom: -25%;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle at 50% 40%, rgba(154, 255, 222, 0.84), rgba(154, 255, 222, 0) 80%);
  animation-delay: -5.5s;
}

body.theme-night .orb-a {
  background: radial-gradient(circle at 40% 40%, rgba(95, 150, 255, 0.78), rgba(142, 200, 255, 0) 78%);
}

body.theme-night .orb-b {
  background: radial-gradient(circle at 60% 50%, rgba(226, 123, 186, 0.66), rgba(255, 159, 213, 0) 78%);
}

body.theme-night .orb-c {
  background: radial-gradient(circle at 50% 40%, rgba(83, 215, 201, 0.58), rgba(154, 255, 222, 0) 80%);
}

.grid-layer {
  position: absolute;
  inset: -10%;
  mask-image: radial-gradient(circle at 50% 50%, black 55%, transparent 100%);
  transform: perspective(1000px) rotateX(62deg) translate3d(0, -25%, 0);
  transform-origin: top;
  opacity: 0.24;
  overflow: hidden;
}

.grid-layer::before {
  content: "";
  position: absolute;
  inset: -40%;
  background-image:
    linear-gradient(rgba(35, 68, 113, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 68, 113, 0.09) 1px, transparent 1px);
  background-size: 38px 38px;
  transform: translate3d(0, 0, 0);
  will-change: transform;
  animation: gridDrift 26s linear infinite;
}

body.theme-night .grid-layer {
  opacity: 0.34;
}

body.theme-night .grid-layer::before {
  background-image:
    linear-gradient(rgba(138, 179, 255, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 179, 255, 0.13) 1px, transparent 1px);
}

.particle-layer {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: var(--size, 4px);
  height: var(--size, 4px);
  border-radius: 999px;
  background: var(--tone, #8bb6ff);
  opacity: var(--particle-opacity);
  transform: translate3d(0, 0, 0);
  will-change: transform, opacity;
  animation: particleRise var(--duration, 10s) linear infinite;
  animation-delay: var(--delay, 0s);
}

.page-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.verify-card {
  position: relative;
  width: min(700px, 100%);
  padding: 38px 42px;
  border-radius: 28px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  box-shadow:
    0 28px 72px rgba(40, 72, 133, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  overflow: hidden;
  transform: perspective(1200px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  will-change: transform;
  transition:
    transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1),
    background 0.45s ease,
    box-shadow 0.45s ease,
    border-color 0.45s ease;
  animation: cardIn 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.verify-card.is-tilting {
  transition-duration: 0.08s;
}

.verify-card.is-updating .stage-header > * {
  animation: stageRefresh 0.34s ease;
}

.verify-card.final-card {
  max-width: 760px;
  box-shadow:
    0 36px 100px rgba(3, 9, 30, 0.65),
    inset 0 1px 0 rgba(160, 188, 255, 0.16);
}

.verify-card.is-final-transitioning {
  pointer-events: none;
}

.verify-card.is-final-transitioning > :not(.spotlight) {
  animation: finalStageLeaveUp 0.42s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.spotlight {
  position: absolute;
  width: 220px;
  height: 220px;
  left: var(--spot-x, 45%);
  top: var(--spot-y, 35%);
  border-radius: 999px;
  pointer-events: none;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(118, 192, 255, 0.38) 0%, rgba(255, 255, 255, 0) 72%);
  transition: opacity 0.3s ease;
  opacity: 0;
}

.verify-card.is-tilting .spotlight {
  opacity: 0.8;
}

body.theme-night .spotlight {
  background: radial-gradient(circle, rgba(116, 155, 255, 0.42) 0%, rgba(255, 255, 255, 0) 72%);
}

.stage-header {
  position: relative;
  z-index: 1;
  margin-bottom: 24px;
}

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

.stage-chip {
  display: inline-flex;
  align-items: center;
  height: 34px;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--chip-text);
  background: var(--chip-bg);
  border: 1px solid rgba(118, 161, 255, 0.34);
}

#title {
  margin: 14px 0 10px;
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
}

#subtitle {
  margin: 0;
  color: var(--text-sub);
  font-size: clamp(0.98rem, 1.75vw, 1.05rem);
  line-height: 1.7;
}

.captcha-area {
  margin: 22px 0 12px;
}

.captcha-slot {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.captcha-slot.hidden {
  display: none;
}

#message {
  min-height: 24px;
  margin: 14px 0 0;
  font-size: 0.94rem;
  font-weight: 700;
  transition: color 0.25s ease;
}

#message.tone-ok {
  color: var(--ok);
}

#message.tone-warn {
  color: var(--warn);
}

#message.tone-info {
  color: var(--info);
}

.helper {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(115, 140, 188, 0.44);
  color: var(--text-sub);
  font-size: 0.88rem;
  line-height: 1.6;
}

body.theme-night .helper {
  border-top-color: rgba(133, 164, 221, 0.45);
}

.theme-toggle {
  border: 1px solid rgba(118, 161, 255, 0.38);
  color: #2852b8;
  background: rgba(255, 255, 255, 0.58);
  width: 34px;
  height: 34px;
  border-radius: 999px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  backdrop-filter: blur(var(--toggle-blur));
  -webkit-backdrop-filter: blur(var(--toggle-blur));
  transition:
    background 0.25s ease,
    color 0.25s ease,
    border-color 0.25s ease,
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 8px 24px rgba(52, 90, 170, 0.18);
}

.theme-toggle:active {
  transform: translateY(0);
}

.theme-toggle:focus-visible {
  outline: 2px solid rgba(111, 144, 255, 0.65);
  outline-offset: 2px;
}

.theme-icon {
  position: absolute;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}

.theme-icon svg {
  width: 100%;
  height: 100%;
}

.icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.icon-sun svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-moon {
  opacity: 0;
  transform: rotate(20deg) scale(0.75);
}

.icon-moon svg {
  fill: currentColor;
  stroke: none;
}

.theme-toggle.is-night .icon-sun {
  opacity: 0;
  transform: rotate(-28deg) scale(0.72);
}

.theme-toggle.is-night .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

body.theme-night .theme-toggle {
  border-color: rgba(138, 173, 248, 0.38);
  color: #d1dfff;
  background: rgba(14, 26, 52, 0.62);
}

body.theme-night .theme-toggle:hover {
  background: rgba(19, 36, 68, 0.9);
  box-shadow: 0 10px 30px rgba(4, 12, 32, 0.45);
}

.final-mockery {
  text-align: center;
}

.final-shell {
  position: relative;
  padding-top: 4px;
  animation: finalStageEnterFromBottom 0.58s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.final-toolbar {
  position: absolute;
  right: 4px;
  top: 0;
  z-index: 3;
}

.final-toolbar .theme-toggle {
  width: 32px;
  height: 32px;
}

.final-mockery strong {
  display: block;
  margin: 18px 0 14px;
  color: var(--final-alert, #ff9fa3);
  font-size: clamp(1.9rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: 0.1em;
}

.final-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  color: var(--final-list-color, #cedcf8);
  font-size: 1rem;
  line-height: 1.65;
}

.final-video {
  margin-top: 0;
  position: relative;
  border-radius: 20px;
  max-height: 0;
  opacity: 0;
  transform: translateY(26px);
  overflow: hidden;
  border: 1px solid rgba(160, 188, 255, 0.28);
  box-shadow: 0 14px 40px rgba(4, 10, 30, 0.55);
  pointer-events: none;
  transition:
    opacity 0.45s ease,
    transform 0.45s ease,
    max-height 0.45s ease,
    margin-top 0.45s ease;
}

.final-shell.is-playing .final-video {
  margin-top: 20px;
  opacity: 1;
  transform: translateY(0);
  max-height: 560px;
  pointer-events: auto;
}

.final-video video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.audio-toggle-button {
  position: absolute;
  right: 12px;
  top: 12px;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid var(--audio-toggle-border, rgba(184, 209, 255, 0.55));
  background: var(--audio-toggle-bg, rgba(9, 18, 38, 0.58));
  color: var(--audio-toggle-color, #f0f6ff);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition:
    background 0.22s ease,
    border-color 0.22s ease,
    transform 0.22s ease,
    box-shadow 0.22s ease;
}

.audio-toggle-button svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.audio-toggle-button:hover {
  transform: translateY(-1px);
  background: var(--audio-toggle-hover-bg, rgba(20, 36, 68, 0.82));
  box-shadow: 0 10px 20px rgba(4, 10, 26, 0.45);
}

.audio-toggle-button:active {
  transform: translateY(0);
}

.audio-toggle-button.is-unmuted {
  background: rgba(50, 140, 255, 0.84);
  border-color: rgba(155, 212, 255, 0.85);
  color: #ffffff;
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(14px) perspective(1200px) rotateX(8deg) rotateY(-6deg);
  }
  to {
    opacity: 1;
    transform: perspective(1200px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  }
}

@keyframes stageRefresh {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes finalStageLeaveUp {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-42px);
  }
}

@keyframes finalStageEnterFromBottom {
  from {
    opacity: 0;
    transform: translateY(34px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes orbFloat {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -22px, 0) scale(1.04);
  }
}

@keyframes gridDrift {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(0, var(--grid-shift), 0);
  }
}

@keyframes particleRise {
  0% {
    transform: translate3d(0, 0, 0);
    opacity: 0;
  }
  12% {
    opacity: 0.34;
  }
  88% {
    opacity: 0.34;
  }
  100% {
    transform: translate3d(var(--drift-x, 16px), var(--rise-distance, -220px), 0);
    opacity: 0;
  }
}

@media (max-width: 760px) {
  .verify-card {
    padding: 28px 22px;
    border-radius: 24px;
  }

  .stage-chip {
    font-size: 11px;
    padding: 7px 12px;
  }

  .helper {
    font-size: 0.84rem;
  }

  .stage-chip {
    height: 32px;
    padding: 7px 12px;
  }

  .theme-toggle {
    width: 32px;
    height: 32px;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .verify-card {
    transform: none !important;
  }
}