:root {
  --bg: #0e141b;
  --panel: rgba(10, 18, 25, 0.82);
  --panel-strong: rgba(13, 24, 35, 0.94);
  --line: rgba(152, 201, 255, 0.22);
  --text: #f3f7fb;
  --muted: #a9bbcf;
  --accent: #79d2ff;
  --accent-strong: #2f9dd4;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  overflow: hidden;
}

.hidden {
  display: none !important;
}

.app-shell {
  position: relative;
  z-index: 5;
  min-height: 100vh;
  pointer-events: none;
}

.intro-card,
.info-panel,
.status-chip,
.detail-modal__dialog {
  pointer-events: auto;
}

.intro-card {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(92vw, 420px);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(16, 30, 42, 0.94), rgba(8, 15, 22, 0.9));
  box-shadow: var(--shadow);
  transform: translate(-50%, -50%);
}

.intro-card.is-immersive {
  inset: auto 50% 24px 50%;
  width: min(94vw, 560px);
  transform: translateX(-50%);
  background: rgba(8, 15, 22, 0.7);
  backdrop-filter: blur(14px);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.intro-card h1,
.detail-modal__dialog h3 {
  margin: 0 0 12px;
  font-size: 28px;
  line-height: 1.15;
}

.intro-copy,
.intro-steps,
#panel-desc,
#modal-desc {
  color: var(--muted);
  line-height: 1.6;
}

.intro-steps {
  margin: 0 0 18px;
  padding-left: 18px;
}

.intro-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.primary-button,
.ghost-button,
.detail-modal__close {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    background 180ms ease;
}

.primary-button:hover,
.ghost-button:hover,
.detail-modal__close:hover {
  transform: translateY(-1px);
}

.primary-button {
  padding: 12px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #051018;
  font-weight: 700;
}

.ghost-button {
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.04);
}

.primary-button:disabled {
  opacity: 0.65;
  cursor: wait;
}

.status-chip {
  position: absolute;
  top: 18px;
  left: 50%;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(5, 10, 16, 0.7);
  backdrop-filter: blur(12px);
  transform: translateX(-50%);
  font-size: 14px;
}

.info-panel {
  position: absolute;
  left: 50%;
  bottom: 20px;
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 16px;
  width: min(92vw, 620px);
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  transform: translateX(-50%);
}

.info-panel__media img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 16px;
}

.info-panel__tag {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.info-panel__body h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.info-panel__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.detail-modal {
  position: fixed;
  inset: 0;
  z-index: 10;
}

.detail-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
}

.detail-modal__dialog {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(90vw, 440px);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
  transform: translate(-50%, -50%);
}

.detail-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 22px;
}

.ar-scene {
  position: fixed !important;
  z-index: 2;
  inset: 0;
  width: 100vw !important;
  height: 100vh !important;
  display: block !important;
}

/* ========== 全局底部信息面板样式（所有宽度均生效） ========== */
.bottom-info-panel {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  width: min(90vw, 560px);
  background: rgba(10, 18, 25, 0.88);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(152, 201, 255, 0.25);
  border-radius: 28px;
  padding: 16px 20px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  z-index: 100;
  pointer-events: auto;
  transition: opacity 0.2s ease;
}

.bottom-info-panel.hidden {
  display: none;
}

/* 图片面板样式 */
.bottom-panel-title {
  margin: 0 0 8px 0;
  font-size: 1.35rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.2px;
}

.bottom-panel-scroll {
  max-height: 140px;
  overflow-y: auto;
  padding-right: 6px;
  scrollbar-width: thin;
}

.bottom-panel-scroll::-webkit-scrollbar {
  width: 4px;
}
.bottom-panel-scroll::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
}
.bottom-panel-scroll::-webkit-scrollbar-thumb {
  background: rgba(121, 210, 255, 0.6);
  border-radius: 4px;
}

.bottom-panel-desc {
  margin: 0;
  color: #cbdde9;
  line-height: 1.5;
  font-size: 0.95rem;
}

/* 视频控制面板样式 */
.video-panel-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 10px;
  color: #b8d8fc;
  letter-spacing: 0.3px;
}

.video-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.ctrl-btn {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: white;
  font-size: 1.2rem;
  width: 38px;
  height: 38px;
  border-radius: 40px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.ctrl-btn:hover {
  background: rgba(255, 255, 255, 0.35);
}

.ctrl-progress {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  background: #3a4a5a;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.ctrl-progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: #79d2ff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 4px #a0e0ff;
}

.ctrl-time {
  font-size: 0.8rem;
  font-family: monospace;
  background: rgba(0,0,0,0.5);
  padding: 4px 8px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  color: #eef4ff;
}

/* 桌面端大屏幕可选优化（>640px） */
@media (min-width: 641px) {
  .bottom-info-panel {
    width: 560px;
    bottom: 24px;
  }
  .bottom-panel-scroll {
    max-height: 160px;
  }
}

/* 移动端适配（≤640px） */
@media (max-width: 640px) {
  .intro-card {
    padding: 20px;
  }
  .intro-card h1 {
    font-size: 24px;
  }
  .info-panel {
    grid-template-columns: 1fr;
  }

  /* 原有视频控件样式（如果还有单独使用的 .video-control） */
  .video-control {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
    border-radius: 40px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    color: white;
    font-family: system-ui, sans-serif;
    transition: opacity 0.3s;
    pointer-events: auto;
  }
  .video-control.hidden {
    display: none;
  }

  /* 移动端底部面板覆盖样式 */
  .bottom-info-panel {
    width: calc(100vw - 32px);
    bottom: 16px;
    padding: 12px 16px;
    border-radius: 24px;
  }
  .bottom-panel-scroll {
    max-height: 110px;
  }
  .video-controls {
    gap: 8px;
  }
  .ctrl-btn {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }
  .ctrl-time {
    font-size: 0.7rem;
    padding: 2px 6px;
  }
}