* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --amber: #e8b04b;
  --amber-dim: #a97f2f;
  --steel: #1a2027;
  --panel: rgba(14, 18, 23, 0.88);
  --line: rgba(232, 176, 75, 0.35);
  --text: #e8e4d8;
}

html, body { width: 100%; height: 100%; overflow: hidden; background: #0b0e12; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  user-select: none;
  -webkit-user-select: none;
}

#view { position: fixed; inset: 0; display: block; }

.hidden { display: none !important; }

/* ---------- 顶栏 ---------- */
#topbar {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px;
  background: linear-gradient(180deg, rgba(8,10,13,.92), rgba(8,10,13,0));
  z-index: 20; pointer-events: none;
}
#brand { display: flex; align-items: center; gap: 12px; }
#brand-badge {
  width: 44px; height: 44px; border-radius: 8px;
  background: linear-gradient(145deg, #3d4a35, #232b1e);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  color: var(--amber); font-size: 22px;
  box-shadow: 0 2px 12px rgba(0,0,0,.5);
}
#brand h1 { font-size: 20px; letter-spacing: 4px; font-weight: 800; }
#brand p { font-size: 10px; letter-spacing: 2.5px; color: var(--amber-dim); margin-top: 2px; }

#mode-switch { display: flex; gap: 10px; pointer-events: auto; }
.mode-btn {
  padding: 10px 22px;
  font-size: 15px; font-weight: 700; letter-spacing: 2px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.mode-btn:hover { border-color: var(--amber); transform: translateY(-1px); }
.mode-btn.active {
  background: linear-gradient(145deg, #6e5426, #4a3818);
  border-color: var(--amber);
  color: #ffe9bd;
  box-shadow: 0 0 16px rgba(232, 176, 75, .25);
}

/* ---------- 博物馆:信息卡 ---------- */
#museum-ui { z-index: 10; }
#info-card {
  position: fixed; left: 22px; top: 96px;
  width: 320px; max-height: calc(100vh - 240px);
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: 8px;
  padding: 18px 20px;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 32px rgba(0,0,0,.55);
}
.card-tag {
  display: inline-block; font-size: 10px; letter-spacing: 2px;
  color: #0b0e12; background: var(--amber);
  padding: 3px 8px; border-radius: 3px; font-weight: 800;
  margin-bottom: 10px;
}
#tank-name { font-size: 26px; font-weight: 800; letter-spacing: 2px; }
#tank-en { font-size: 11px; color: #9aa3ad; letter-spacing: 1px; margin: 4px 0 14px; font-style: italic; }

#tank-specs { width: 100%; border-collapse: collapse; margin-bottom: 14px; }
#tank-specs td {
  padding: 5px 0; font-size: 13px;
  border-bottom: 1px dashed rgba(255,255,255,.08);
}
#tank-specs td:first-child { color: #8f9aa6; width: 84px; }
#tank-specs td:last-child { color: #f4efe2; font-weight: 600; }

#tank-facts { margin-bottom: 16px; }
#tank-facts .fact {
  font-size: 12.5px; line-height: 1.65; color: #cfd6dd;
  padding: 7px 0 7px 22px; position: relative;
}
#tank-facts .fact::before {
  content: "▸"; position: absolute; left: 4px; color: var(--amber);
}

#btn-narrate {
  width: 100%; padding: 12px;
  font-size: 15px; font-weight: 700; letter-spacing: 3px;
  color: #0b0e12; background: linear-gradient(145deg, #f0c060, #cf9a35);
  border: none; border-radius: 6px; cursor: pointer;
  font-family: inherit;
  transition: all .15s;
}
#btn-narrate:hover { filter: brightness(1.1); }
#btn-narrate.playing { background: linear-gradient(145deg, #d9534f, #a83a36); color: #fff; }

/* 字幕/讲解:屏幕下方居中的大字幕条(演示分步讲解 + 配音共用),在车库条上方,醒目好读 */
#subtitle {
  position: fixed;
  left: 50%; bottom: 104px; transform: translateX(-50%);
  width: max-content; max-width: min(820px, calc(100vw - 48px));
  padding: 14px 24px; box-sizing: border-box;
  font-size: 19px; line-height: 1.65; color: #fff1d4; text-align: center;
  background: rgba(18, 14, 8, .84);
  border-radius: 14px;
  border: 1px solid rgba(232, 176, 75, .5);
  box-shadow: 0 8px 30px rgba(0, 0, 0, .55);
  z-index: 60; pointer-events: none;
  text-shadow: 0 2px 6px rgba(0, 0, 0, .6);
}
@media (max-width: 720px) {
  #subtitle { font-size: 16px; bottom: 96px; padding: 11px 16px; }
}

/* ---------- 博物馆:车库选择条 ---------- */
#garage-strip {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px; padding: 8px;
  max-width: min(1240px, calc(100vw - 24px));
  overflow-x: auto; overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x proximity;
  overscroll-behavior-x: contain;
  scrollbar-width: thin; scrollbar-color: var(--amber) transparent;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  backdrop-filter: blur(8px);
}
#garage-strip::-webkit-scrollbar { height: 6px; }
#garage-strip::-webkit-scrollbar-track { background: transparent; }
#garage-strip::-webkit-scrollbar-thumb { background: rgba(232,176,75,.5); border-radius: 3px; }
#garage-strip::-webkit-scrollbar-thumb:hover { background: var(--amber); }
.garage-item {
  position: relative;
  flex: 0 0 auto; scroll-snap-align: center;
  min-width: 78px; padding: 10px 12px;
  text-align: center; border-radius: 6px;
  border: 1px solid rgba(255,255,255,.08);
  cursor: pointer; transition: all .15s;
}
.garage-item .g-flag { display: block; font-size: 20px; }
.garage-item .g-name { display: block; font-size: 12px; font-weight: 700; margin-top: 4px; letter-spacing: 1px; }
.garage-item.selected { border-color: var(--amber); background: rgba(232,176,75,.12); }
#museum-hint {
  position: fixed; bottom: 20px; right: 24px;
  font-size: 12px; color: #7d8894; letter-spacing: 1px;
}

/* ---------- 博物馆:结构面板 ---------- */
#structure-panel, #gustav-panel {
  position: fixed; right: 22px; top: 96px;
  width: 148px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-right: 3px solid var(--amber);
  border-radius: 8px;
  padding: 12px 10px;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 32px rgba(0,0,0,.55);
  display: flex; flex-direction: column; gap: 8px;
}
.sp-title {
  text-align: center; font-size: 11px; letter-spacing: 6px;
  color: var(--amber-dim); font-weight: 800; margin-bottom: 2px;
}
.sp-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 10px;
  font-size: 13px; font-weight: 700; letter-spacing: 1px;
  white-space: nowrap;
  color: var(--text);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 6px;
  cursor: pointer; transition: all .15s;
  font-family: inherit;
}
.sp-btn .sp-ico { font-size: 14px; }
.sp-btn:hover { border-color: var(--amber); transform: translateX(-2px); }
.sp-btn.on {
  background: linear-gradient(145deg, #6e5426, #4a3818);
  border-color: var(--amber); color: #ffe9bd;
  box-shadow: 0 0 12px rgba(232,176,75,.25);
}
.sp-btn.sp-audio.playing { background: linear-gradient(145deg, #d9534f, #a83a36); border-color: #d9534f; color: #fff; }
.sp-hint {
  text-align: center; font-size: 10px; line-height: 1.7;
  color: #7d8894; letter-spacing: 1px; margin-top: 2px;
}
@media (max-width: 900px) {
  #structure-panel, #gustav-panel { width: 110px; padding: 10px 8px; }
  .sp-btn { font-size: 11.5px; padding: 8px 8px; }
}

/* ---------- 驾驶 HUD ---------- */
#drive-ui { z-index: 10; }
#crosshair {
  position: fixed; left: 50%; top: 50%;
  width: 44px; height: 44px;
  transform: translate(-50%, -50%);
  border: 1.5px solid rgba(120, 255, 140, .8);
  border-radius: 50%;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(120,255,140,.3), inset 0 0 8px rgba(120,255,140,.15);
}
#crosshair::before, #crosshair::after {
  content: ""; position: absolute; background: rgba(120, 255, 140, .8);
}
#crosshair::before { left: 50%; top: -8px; width: 1.5px; height: 12px; transform: translateX(-50%); box-shadow: 0 48px 0 rgba(120,255,140,.8); }
#crosshair::after { top: 50%; left: -8px; height: 1.5px; width: 12px; transform: translateY(-50%); box-shadow: 48px 0 0 rgba(120,255,140,.8); }
.ch-dot {
  position: absolute; left: 50%; top: 50%; width: 4px; height: 4px;
  background: rgba(120,255,140,.9); border-radius: 50%;
  transform: translate(-50%, -50%);
}

#drive-hint {
  position: fixed; top: 84px; left: 50%; transform: translateX(-50%);
  font-size: 13px; letter-spacing: 2px; color: #cdd5dc;
  background: var(--panel); border: 1px solid rgba(255,255,255,.1);
  padding: 8px 18px; border-radius: 20px;
  animation: fadeHint 1s 6s forwards;
}
@keyframes fadeHint { to { opacity: 0; visibility: hidden; } }

#hud-left, #hud-right {
  position: fixed; bottom: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 20px;
  min-width: 130px;
  backdrop-filter: blur(8px);
}
#hud-left { left: 24px; }
#hud-right { right: 24px; text-align: right; }
.hud-label { font-size: 10px; letter-spacing: 3px; color: #8f9aa6; margin-bottom: 4px; }
#hud-speed { font-size: 30px; font-weight: 800; color: #b8e8c0; font-variant-numeric: tabular-nums; }
#hud-speed span { font-size: 12px; color: #7d8894; font-weight: 400; }
#hud-score { font-size: 30px; font-weight: 800; color: var(--amber); font-variant-numeric: tabular-nums; }

#reload-bar {
  width: 120px; height: 6px; margin: 8px 0 4px auto;
  background: rgba(255,255,255,.1); border-radius: 3px; overflow: hidden;
}
#reload-fill {
  width: 100%; height: 100%;
  background: linear-gradient(90deg, #6fc96f, #a8e8a0);
  border-radius: 3px;
  transition: width .05s linear;
}
#reload-text { font-size: 11px; color: #9fd8a8; letter-spacing: 2px; }

/* ---------- 加载 ---------- */
#loading {
  position: fixed; inset: 0; z-index: 100;
  background: #0b0e12;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 18px;
  transition: opacity .5s;
}
#loading p { letter-spacing: 4px; color: var(--amber-dim); font-size: 14px; }
.spinner {
  width: 46px; height: 46px;
  border: 3px solid rgba(232,176,75,.15);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 窄屏适配 */
@media (max-width: 900px) {
  #info-card { width: 260px; padding: 14px 16px; }
  #tank-name { font-size: 21px; }
  #brand h1 { font-size: 16px; letter-spacing: 2px; }
  .mode-btn { padding: 8px 14px; font-size: 13px; }
}