:root {
  --bg-1: #f6fbf4;
  --bg-2: #d8e7ff;
  --card: #ffffff;
  --ink: #0f2630;
  --muted: #4f6772;
  --line: rgba(16, 82, 99, 0.2);
  --accent-1: #1f90a3;
  --accent-2: #3c6df0;
  --ok: #1f9d67;
  --danger: #d64552;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(1000px 430px at 12% -15%, rgba(31, 144, 163, 0.16), transparent 58%),
    radial-gradient(860px 380px at 98% 0%, rgba(60, 109, 240, 0.18), transparent 64%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
}

.slide-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.slide-card {
  width: min(560px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 22px 52px rgba(15, 38, 48, 0.18);
  padding: 26px 22px 24px;
  animation: card-in 420ms cubic-bezier(0.16, 0.8, 0.28, 1) both;
}

.slide-tag {
  margin: 0 0 10px;
  letter-spacing: 0.08em;
  font-size: 12px;
  text-transform: uppercase;
  font-weight: 700;
  color: #0f6f8f;
}

.slide-card h1 {
  margin: 0;
  font-size: clamp(24px, 5vw, 35px);
  line-height: 1.14;
}

.slide-sub {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.puzzle-board {
  margin-top: 18px;
  width: 100%;
  aspect-ratio: 16 / 9;
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(15, 65, 88, 0.2);
  background:
    radial-gradient(circle at 18% 34%, rgba(24, 167, 123, 0.95) 0 23%, transparent 24%),
    radial-gradient(circle at 77% 26%, rgba(250, 90, 85, 0.9) 0 29%, transparent 30%),
    radial-gradient(circle at 83% 70%, rgba(32, 136, 225, 0.95) 0 23%, transparent 24%),
    conic-gradient(from 180deg at 45% 40%, #f6d3b9 0 20%, #f8e9dc 20% 45%, #ebf7ff 45% 72%, #fde8ec 72% 100%);
}

.puzzle-glow {
  position: absolute;
  inset: 0;
  background: repeating-radial-gradient(circle at 44% 42%, rgba(255,255,255,0.28) 0 2px, transparent 3px 15px);
  pointer-events: none;
}

.puzzle-hole,
.puzzle-piece {
  width: var(--puzzle-size, 68px);
  height: var(--puzzle-size, 68px);
  border-radius: 14px;
  position: absolute;
  top: 0;
  transform: none;
}

/* 缺口：多层阴影营造凹陷感，顶左高光 + 底右暗部，视觉更清晰、更美观 */
.puzzle-hole {
  left: 240px;
  /* 凹陷内部：深色底 + 轻微渐变，模拟光照 */
  background: linear-gradient(
    145deg,
    rgba(12, 28, 52, 0.78) 0%,
    rgba(8, 20, 42, 0.88) 50%,
    rgba(4, 14, 32, 0.92) 100%
  );
  /* 边框：主边框略粗，带高光感 */
  border: 4px solid rgba(248, 252, 255, 0.96);
  box-shadow:
    /* 外圈：柔和光晕，让缺口更显眼 */
    0 0 0 2px rgba(25, 70, 120, 0.75),
    0 0 0 6px rgba(160, 215, 255, 0.45),
    0 0 28px rgba(120, 190, 255, 0.5),
    0 0 40px rgba(90, 170, 255, 0.2),
    /* 内阴影：左上浅（受光）、右下深（背光），强烈层次感 */
    inset 4px 4px 12px rgba(255, 255, 255, 0.12),
    inset -4px -4px 16px rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(230, 245, 255, 0.35);
  animation: hole-pulse 1.15s ease-in-out infinite;
}

.puzzle-hole::before,
.puzzle-hole::after {
  content: "";
  position: absolute;
  border-radius: inherit;
  pointer-events: none;
}

/* 外层光带：增强缺口轮廓，不抢戏 */
.puzzle-hole::before {
  inset: -10px;
  border: 2px solid rgba(180, 225, 255, 0.65);
  box-shadow: 0 0 24px rgba(100, 180, 255, 0.4);
}

/* 内缘高光：模拟切口反光，增加立体感 */
.puzzle-hole::after {
  inset: 4px;
  background: linear-gradient(
    155deg,
    rgba(255, 255, 255, 0.08) 0%,
    transparent 35%,
    rgba(0, 0, 0, 0.25) 100%
  );
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.25),
    inset 6px 6px 14px rgba(0, 0, 0, 0.45),
    inset -2px -2px 8px rgba(170, 215, 255, 0.12);
}

.puzzle-hole-decoy {
  background: linear-gradient(
    145deg,
    rgba(14, 32, 58, 0.55) 0%,
    rgba(10, 24, 44, 0.7) 100%
  );
  border: 3px solid rgba(218, 238, 255, 0.72);
  box-shadow:
    0 0 0 2px rgba(22, 58, 100, 0.45),
    0 0 0 8px rgba(175, 218, 255, 0.28),
    0 0 16px rgba(100, 175, 255, 0.25),
    inset 2px 2px 8px rgba(255, 255, 255, 0.06),
    inset -3px -3px 12px rgba(0, 0, 0, 0.4),
    inset 0 0 0 1px rgba(210, 235, 255, 0.2);
  animation: none;
  opacity: 0.78;
}

.puzzle-hole-decoy::before {
  border-color: rgba(185, 220, 255, 0.4);
  box-shadow: 0 0 12px rgba(95, 175, 255, 0.22);
}

.puzzle-hole-decoy::after {
  box-shadow:
    inset 0 0 0 1px rgba(205, 230, 255, 0.18),
    inset 4px 4px 10px rgba(0, 0, 0, 0.35),
    inset -2px -2px 6px rgba(150, 200, 255, 0.08);
}

/* 拼图块：与缺口风格统一，略凸起感，便于识别可拖动 */
.puzzle-piece {
  left: 0;
  background: linear-gradient(145deg, rgba(250, 254, 255, 0.98), rgba(232, 246, 255, 0.95));
  border: 3px solid rgba(235, 248, 255, 0.98);
  box-shadow:
    0 0 0 2px rgba(22, 68, 118, 0.7),
    0 0 0 6px rgba(165, 218, 255, 0.5),
    0 0 20px rgba(118, 195, 255, 0.45),
    0 8px 18px rgba(0, 0, 0, 0.18),
    inset 2px 2px 6px rgba(255, 255, 255, 0.9);
}

.puzzle-piece::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: inherit;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.92),
    inset 6px 6px 12px rgba(0, 0, 0, 0.12),
    inset -3px -3px 8px rgba(180, 220, 255, 0.25);
  pointer-events: none;
}

.puzzle-piece-decoy {
  opacity: 0.5;
  box-shadow:
    0 0 0 1px rgba(24, 62, 108, 0.4),
    0 0 0 4px rgba(148, 205, 255, 0.28),
    0 6px 14px rgba(0, 0, 0, 0.14);
}

.scene-from-node {
  background-size: 100% 100%;
  background-repeat: no-repeat;
  background-position: 0 0;
}

.slider-track {
  margin-top: 16px;
  position: relative;
  height: 48px;
  border-radius: 999px;
  background: #e8eef4;
  border: 1px solid rgba(12, 44, 62, 0.18);
  overflow: hidden;
  touch-action: none;
  -ms-touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.slider-progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: linear-gradient(90deg, rgba(31, 144, 163, 0.3), rgba(60, 109, 240, 0.28));
  transition: width 90ms linear;
}

.slider-handle {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  box-shadow: 0 6px 14px rgba(16, 52, 75, 0.28);
  cursor: grab;
  touch-action: none;
  -ms-touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

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

.puzzle-board {
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.slide-tip {
  margin: 12px 0 0;
  font-size: 14px;
  color: #486470;
}

.slide-tip.ok { color: var(--ok); }
.slide-tip.fail { color: var(--danger); }

@keyframes card-in {
  from { transform: translateY(16px) scale(0.985); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

@keyframes hole-pulse {
  0%, 100% {
    box-shadow:
      0 0 0 2px rgba(25, 70, 120, 0.75),
      0 0 0 6px rgba(160, 215, 255, 0.45),
      0 0 28px rgba(120, 190, 255, 0.5),
      0 0 40px rgba(90, 170, 255, 0.2),
      inset 4px 4px 12px rgba(255, 255, 255, 0.12),
      inset -4px -4px 16px rgba(0, 0, 0, 0.55),
      inset 0 0 0 1px rgba(230, 245, 255, 0.35);
  }
  50% {
    box-shadow:
      0 0 0 2px rgba(28, 78, 135, 0.85),
      0 0 0 8px rgba(175, 225, 255, 0.55),
      0 0 32px rgba(130, 200, 255, 0.6),
      0 0 48px rgba(100, 180, 255, 0.28),
      inset 4px 4px 12px rgba(255, 255, 255, 0.16),
      inset -4px -4px 18px rgba(0, 0, 0, 0.6),
      inset 0 0 0 1px rgba(240, 250, 255, 0.4);
  }
}

@media (max-width: 560px) {
  .slide-wrap { padding: 14px; }
  .slide-card { padding: 22px 16px 20px; border-radius: 18px; }
  .slider-track { height: 46px; }
  .slider-handle { width: 40px; height: 40px; }
}

@media (max-width: 360px) {
  .slide-wrap { padding: 10px; }
  .slide-card { padding: 18px 12px 16px; border-radius: 16px; }
  .slider-handle { width: 36px; height: 36px; }
}