:root {
  color-scheme: light;
  --primary: #338af8;
  --text: #333333;
  --muted: #999999;
  --track: #eeeeee;
  --track-width: 400px;
  --track-height: 80px;
  --handle-size: 68px;
  --handle-gap: 6px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  min-width: 280px;
  height: 100%;
}

body {
  color: var(--text);
  background: #ffffff;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

button {
  font: inherit;
}

.welcome-page {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 540px;
  overflow: hidden;
  background: #ffffff;
}

.welcome-content {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  padding: 0 20px;
  text-align: center;
  transform: translateY(-50%);
}

h1 {
  padding-bottom: 20px;
  font-size: 60px;
  font-weight: 600;
  line-height: 1.2;
}

.subtitle {
  margin-bottom: 60px;
  font-size: 30px;
  line-height: 48px;
}

.slider {
  position: relative;
  width: min(var(--track-width), 100%);
  height: var(--track-height);
  margin: 0 auto;
  overflow: hidden;
  color: var(--muted);
  background: var(--track);
  border-radius: 10px;
  line-height: var(--track-height);
  transform: translateZ(0);
  touch-action: none;
}

.slider-label,
.slider-progress p {
  width: 100%;
  padding: 0 10px;
  overflow: hidden;
  font-size: 30px;
  line-height: var(--track-height);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slider-progress {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  width: var(--track-height);
  height: 100%;
  overflow: hidden;
  color: #ffffff;
  background: var(--primary);
  border-radius: 10px;
  opacity: 0;
}

.slider-progress p {
  width: var(--track-width);
}

.slider-handle {
  position: absolute;
  top: var(--handle-gap);
  left: var(--handle-gap);
  z-index: 3;
  width: var(--handle-size);
  height: var(--handle-size);
  cursor: grab;
  background: #ffffff;
  border: 0;
  border-radius: 6px;
  box-shadow: none;
}

.slider-handle:active {
  cursor: grabbing;
}

.slider-handle::before,
.slider-handle::after {
  position: absolute;
  top: 32px;
  left: 18px;
  width: 24px;
  height: 4px;
  content: "";
  background: var(--primary);
  border-radius: 3px;
  transform-origin: 96% 50%;
  transition: 0.3s;
}

.slider-handle::before {
  transform: rotate(45deg);
}

.slider-handle::after {
  transform: rotate(-45deg);
}

.slider[data-state="success"] .slider-handle {
  cursor: default;
  background: radial-gradient(circle, var(--primary) 49%, #ffffff 52%);
}

.slider[data-state="success"] .slider-handle::before {
  top: 40px;
  left: 18px;
  width: 14px;
  background: #ffffff;
}

.slider[data-state="success"] .slider-handle::after {
  top: 24px;
  left: 24px;
  background: #ffffff;
}

.slider.is-resetting .slider-handle,
.slider.is-resetting .slider-progress {
  transition: left 0.3s ease-in-out, width 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.success-message {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  min-height: 22px;
  margin-top: 24px;
  color: var(--primary);
  font-size: 16px;
}

@media (max-width: 600px) {
  :root {
    --track-width: 200px;
    --track-height: 40px;
    --handle-size: 34px;
    --handle-gap: 3px;
  }

  .welcome-content {
    padding: 0 20px;
  }

  h1 {
    padding-bottom: 10px;
    font-size: 30px;
  }

  .subtitle {
    margin-bottom: 30px;
    font-size: 15px;
    line-height: 24px;
  }

  .slider {
    border-radius: 5px;
  }

  .slider-label,
  .slider-progress p {
    font-size: 15px;
    line-height: var(--track-height);
  }

  .slider-progress {
    border-radius: 5px;
  }

  .slider-handle {
    border-radius: 3px;
  }

  .slider-handle::before,
  .slider-handle::after {
    top: 16px;
    left: 9px;
    width: 12px;
    height: 2px;
  }

  .slider[data-state="success"] .slider-handle::before {
    top: 20px;
    left: 9px;
    width: 7px;
  }

  .slider[data-state="success"] .slider-handle::after {
    top: 12px;
    left: 12px;
  }

  .success-message {
    margin-top: 12px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}