* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #f3ecdf;
  --bg-soft: #ebe2cf;
  --card-bg: #fbf7ee;
  --text: #463a2a;
  --text-dim: #7d7059;
  --accent: #b07d3f;
  --border: #d8cbb0;
}
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* 顶部导航 */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(243,236,223,0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.logo {
  font-size: 22px; font-weight: 700; letter-spacing: 1px;
  color: var(--accent);
}
.logo::after { content: " 展示"; color: var(--text); font-weight: 500; }
.nav a {
  color: var(--text-dim); text-decoration: none;
  margin-left: 28px; font-size: 15px; transition: color .2s;
}
.nav a:hover { color: var(--accent); }

/* 首屏 */
.hero { text-align: center; padding: 72px 24px 40px; }
.hero h1 { font-size: 40px; font-weight: 700; letter-spacing: 2px; }
.hero-sub { color: var(--text-dim); margin-top: 14px; font-size: 15px; }

/* 产品区 */
.products { max-width: 1200px; margin: 0 auto; padding: 0 24px 60px; }
.section-title {
  font-size: 20px; font-weight: 600; margin-bottom: 24px;
  padding-left: 12px; border-left: 4px solid var(--accent);
}
.card-grid {
  display: grid;
  /* 昨晚 XR 展示墙形态：一行 4 个，共 2 行（8 个） */
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}
.card {
  cursor: pointer;
  transition: transform .25s;
  position: relative;
}
.card:hover { transform: translateY(-3px); }
.card.drag-over .card-viewport { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(176,125,63,.35); }
.card-viewport {
  width: 100%;
  /* 模型独立 1:1 方框（与文件名分离） */
  height: 0;
  padding-bottom: 100%;
  background: radial-gradient(ellipse at 50% 45%, #f7f0e2 0%, #e9dec6 75%);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  transition: border-color .25s, box-shadow .25s;
}
.card:hover .card-viewport { border-color: var(--accent); box-shadow: 0 10px 26px rgba(122,98,60,.25); }
.card-viewport canvas {
  position: absolute; inset: 0;
  display: block; width: 100%; height: 100%;
  object-fit: cover;
}
.card-viewport .card-img {
  position: absolute; inset: 0;
  display: block; width: 100%; height: 100%;
  object-fit: contain;
}
/* 加载中：预览图盖住 3D 画布（画布在下面渲染），进度条最上层 */
.card-viewport canvas { z-index: 1; }
.card-img { z-index: 2; }
.card-name {
  /* 文件名独立 UI 框（胶囊标签），位于模型方框外下方居中 */
  display: flex; align-items: center; justify-content: center;
  width: fit-content; min-width: 55%; max-width: 100%;
  margin: 12px auto 4px;
  padding: 7px 18px;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.card-spin { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--text-dim); font-size: 14px; pointer-events: none; z-index: 5; }
/* 加载进度条（0-100%） */
.card-progress { width: 68%; max-width: 220px; text-align: center; }
.card-progress-pct { font-size: 24px; font-weight: 700; color: var(--accent); margin-bottom: 10px; letter-spacing: 1px; }
.card-progress-track { height: 6px; border-radius: 999px; background: rgba(122,98,60,.16); overflow: hidden; }
.card-progress-fill { height: 100%; width: 0%; border-radius: 999px; background: linear-gradient(90deg, #e0b06a, var(--accent)); transition: width .12s linear; }
.loading-hint { text-align: center; color: var(--text-dim); padding: 20px 0; display: none; }

/* 卡片"一键加载 3D 预览"按钮（模型默认不加载，点击后才加载） */
.card-load-btn {
  position: absolute; inset: 0; z-index: 4;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  background: rgba(243,236,223,.62);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
  border: none; cursor: pointer;
  font-size: 15px; font-weight: 500; letter-spacing: 1px;
  color: #5a4c37;
  transition: background .2s;
}
.card-load-btn:hover { background: rgba(176,125,63,.16); }
.card-load-btn .load-main { font-size: 15px; font-weight: 500; letter-spacing: 1px; }
.card-load-btn .load-sub { font-size: 12px; color: rgba(90,76,55,.72); font-weight: 400; letter-spacing: .5px; }
.load-ico {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(176,125,63,.18);
  border: 1.5px solid rgba(176,125,63,.55);
  box-shadow: 0 4px 14px rgba(122,98,60,.2);
}
.load-ico::after {
  content: ""; width: 0; height: 0; margin-left: 4px;
  border-top: 7px solid transparent; border-bottom: 7px solid transparent;
  border-left: 11px solid #7a5a2e;
}

/* 卡片 XR 预览图（主页不加载 XR iframe；点击预览图新标签打开 XR 页面） */
.card-xr-preview {
  position: absolute; left: 0; top: 0; width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: #f0e7d4; cursor: pointer; overflow: hidden; z-index: 3;
}
.card-xr-preview-img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
.card-xr-preview-tip {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 8px 0;
  background: rgba(0,0,0,.35); color: #fff; font-size: 13px; text-align: center;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  pointer-events: none;
}
/* 入 XR 全屏时隐藏主页各区块（双保险，不依赖 fixed 位置） */
body.xr-fs-lock .site-header,
body.xr-fs-lock .hero,
body.xr-fs-lock .products,
body.xr-fs-lock .contact,
body.xr-fs-lock .site-footer { visibility: hidden !important; }
/* 联系区 */
.contact { max-width: 1200px; margin: 0 auto; padding: 0 24px 70px; }
.contact-info {
  display: flex; flex-direction: column; align-items: flex-start; gap: 14px;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px 26px;
  color: var(--text-dim);
}

/* 页脚 */
.site-footer {
  text-align: center; padding: 26px; color: var(--text-dim);
  border-top: 1px solid var(--border); font-size: 13px;
}

/* 材质球与还原按钮（全屏材质栏使用） */
.swatches { display: flex; flex-direction: row !important; flex-wrap: wrap; gap: 8px; }
.swatch {
  width: 42px; height: 42px; border-radius: 10px;
  cursor: grab; user-select: none;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 2px solid rgba(70,58,42,.2);
  transition: transform .15s, border-color .15s;
}
.swatch:hover { transform: scale(1.08); border-color: var(--accent); }
.swatch:active { cursor: grabbing; }
.swatch-circle { width: 20px; height: 20px; border-radius: 50%; }
.swatch-name { font-size: 9px; color: var(--text); margin-top: 3px; line-height: 1; }
.restore-btn {
  padding: 8px 14px; border-radius: 8px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-dim); font-size: 13px; cursor: pointer;
  transition: all .2s;
}
.restore-btn:hover { color: var(--accent); border-color: var(--accent); }

/* 全屏查看 */
.fs-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: #efe7d4;
  display: flex; flex-direction: column;
}
.fs-overlay[hidden] { display: none; }
.fs-topbar {
  position: absolute; top: 0; left: 0; right: 0; z-index: 5;
  display: flex; align-items: center; justify-content: flex-end;
  padding: 16px 22px;
  background: linear-gradient(to bottom, rgba(243,236,223,.75), transparent);
  pointer-events: none;
}
/* 全屏层：禁用长按文本选择/系统菜单/图片保存，避免手机端误触拷贝 */
.fs-overlay, .fs-overlay * {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
/* 主页模型卡片（含 3D 预览 canvas）：同样禁用长按选中/菜单 */
.card, .card * {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
.fs-topbar[hidden] { display: none; }
.fs-title {
  position: absolute; left: 0; right: 0; top: 50%; transform: translateY(-50%);
  text-align: center;
  font-size: 20px; font-weight: 600;
  pointer-events: none;
}
.fs-exit {
  position: absolute; left: 14px; top: 16px;
  pointer-events: auto;
  background: rgba(251,247,238,.55); border: 1px solid rgba(70,58,42,.2);
  color: var(--text);
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all .2s; z-index: 3;
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
}
.fs-exit:hover { background: rgba(176,125,63,.18); color: var(--accent); }
.fs-parts-tab {
  position: absolute; left: 4px; top: 50%; transform: translateY(-50%); z-index: 7;
  width: 30px; padding: 14px 0;
  background: rgba(251,247,238,.55); border: 1px solid rgba(176,125,63,.4);
  color: var(--accent); font-size: 12px; line-height: 1.45; text-align: center;
  border-radius: 10px; cursor: pointer;
  backdrop-filter: blur(12px) saturate(1.3);
  -webkit-backdrop-filter: blur(12px) saturate(1.3);
  box-shadow: 0 4px 14px rgba(70,58,42,.15);
  transition: all .2s;
}
.fs-parts-tab:hover { background: rgba(176,125,63,.18); }
.fs-parts-tab.on { background: rgba(176,125,63,.92); color: #fff; border-color: transparent; }
#fsView { flex: 1; position: relative; }
#fsView canvas { display: block; width: 100%; height: 100%; }
.fs-hint {
  position: absolute; bottom: 168px; left: 0; right: 0;
  text-align: center; color: rgba(70,58,42,.6);
  font-size: 13px; pointer-events: none;
  z-index: 4;
  transition: opacity .6s ease;
}

/* 全屏右侧 HDR 亮度竖滑条（带记忆） */
.fs-bright {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  z-index: 30;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 12px 5px;
  background: rgba(251,247,238,.92);
  border: 1px solid var(--border); border-radius: 999px;
  box-shadow: 0 4px 18px rgba(122,98,60,.16);
}
.fs-bright[hidden] { display: none; }
.fs-bright-close {
  border: none; background: rgba(70,58,42,.08); color: var(--dim);
  width: 18px; height: 18px; line-height: 1; border-radius: 50%;
  font-size: 11px; cursor: pointer; padding: 0;
}
.fs-bright-close:hover { background: rgba(176,125,63,.2); color: var(--accent); }
.fs-bright-tab {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%); z-index: 7;
  width: 30px; padding: 14px 0;
  background: rgba(251,247,238,.55); border: 1px solid rgba(176,125,63,.4);
  color: var(--accent); font-size: 12px; line-height: 1.45; text-align: center;
  border-radius: 10px; cursor: pointer;
  backdrop-filter: blur(12px) saturate(1.3);
  -webkit-backdrop-filter: blur(12px) saturate(1.3);
  box-shadow: 0 4px 14px rgba(70,58,42,.15);
  transition: all .2s;
}
.fs-bright-tab:hover { background: rgba(176,125,63,.18); }
.fs-bright-tab.on { background: rgba(176,125,63,.92); color: #fff; border-color: transparent; }
.fs-bright-label { font-size: 10px; color: var(--text-dim); letter-spacing: 2px; writing-mode: vertical-lr; }
.fs-bright input[type=range] {
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  width: 20px; height: 150px;
  margin: 0; padding: 0;
  touch-action: none; /* 手机端拖动亮度条不带动侧栏滚动 */
  accent-color: var(--accent);
  cursor: pointer;
}
.fs-bright-sun {
  width: 12px; height: 12px; border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, #d9a94e 0%, #c98a2e 60%, #a86f20 100%);
  box-shadow: 0 0 8px rgba(217,169,78,.7);
  flex-shrink: 0;
}
/* 全屏材质工具行：白模 / 原材质 / 我的配色（底部材质栏上方） */
.fs-tools-bar {
  position: absolute; bottom: 104px; left: 0; right: 0; z-index: 6;
  display: flex; justify-content: center; gap: 10px;
  padding: 4px 12px;
  pointer-events: none;
}
.fs-tools-bar[hidden] { display: none; }
.fs-tool-btn {
  pointer-events: auto;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px; border-radius: 999px;
  background: rgba(251,247,238,.82);
  border: 1px solid rgba(70,58,42,.22);
  color: #463a2a; font-size: 13px; line-height: 1;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: transform .15s, background .2s, border-color .2s, box-shadow .2s;
  cursor: pointer; white-space: nowrap;
  box-shadow: 0 2px 10px rgba(122,98,60,.18);
}
.fs-tool-btn:hover, .fs-tool-btn:active {
  background: rgba(176,125,63,.2);
  border-color: rgba(176,125,63,.7);
  color: #3a2f21;
  transform: translateY(-1px);
  box-shadow: 0 2px 14px rgba(176,125,63,.3);
}
.fs-tool-btn .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.fs-tool-btn .dot-white { background: #f5f7fa; box-shadow: 0 0 6px rgba(255,255,255,.7); }
.fs-tool-btn .dot-orig { background: linear-gradient(135deg, #d4af37, #7fa8d9); box-shadow: 0 0 6px rgba(127,168,217,.6); }
.fs-tool-btn .dot-user { background: #33ccff; box-shadow: 0 0 6px rgba(51,204,255,.8); }
.fs-tool-btn .dot-clear { border-radius: 2px; background: transparent; border: 1.5px solid rgba(70,58,42,.7); }
/* 自转按钮：开启时小圆环旋转 */
.fs-tool-btn .dot-spin { width: 12px; height: 12px; border-radius: 50%; background: transparent; border: 2px solid rgba(70,58,42,.35); border-top-color: rgba(70,58,42,.8); }
.fs-tool-btn.on .dot-spin { border-color: rgba(176,125,63,.3); border-top-color: #b07d3f; animation: fs-spin 1s linear infinite; }
@keyframes fs-spin { to { transform: rotate(360deg); } }
.fs-tool-btn .dot-hdr { background: radial-gradient(circle at 35% 35%, #fff3c4, #d9a94e 55%, #b07d3f); box-shadow: 0 0 6px rgba(217,169,78,.8); }
/* HDR 开关按钮状态：开=高亮，关=变淡 */
.fs-tool-btn.on { border-color: rgba(176,125,63,.75); background: rgba(176,125,63,.16); box-shadow: 0 0 10px rgba(176,125,63,.28); }
.fs-tool-btn.off { opacity: .55; }
/* 清屏模式：恢复按钮 = 底部居中一个小圆点，悬停展开成「恢复界面」按钮；2 秒无操作自动隐藏 */
.fs-clear-restore {
  position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 7;
  width: 14px; height: 14px; padding: 0;
  border-radius: 50%;
  background: rgba(70,58,42,.32);
  border: none;
  color: transparent; font-size: 0; white-space: nowrap; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: width .25s ease, height .25s ease, padding .25s ease, border-radius .25s ease,
              background .25s ease, color .25s ease, opacity .4s ease;
}
.fs-clear-restore[hidden] { display: none; }
.fs-clear-restore.hidden-auto { opacity: 0; pointer-events: none; }
/* 悬停/聚焦展开成完整按钮 */
.fs-clear-restore:hover, .fs-clear-restore:focus-visible {
  width: auto; height: 34px; padding: 0 18px;
  border-radius: 999px;
  background: rgba(251,247,238,.92);
  border: 1px solid rgba(70,58,42,.28);
  color: #463a2a; font-size: 13px;
  box-shadow: 0 4px 14px rgba(70,58,42,.16);
}
/* ---------- 左侧部件管理面板 ---------- */
.fs-parts-panel {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%); z-index: 6;
  width: 136px; max-height: 72vh;
  display: flex; flex-direction: column;
  background: rgba(251,247,238,.6);
  border: 1px solid rgba(255,255,255,.6);
  border-radius: 16px;
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  box-shadow: 0 10px 30px rgba(70,58,42,.2);
  overflow: hidden;
}
.fs-parts-panel[hidden] { display: none; }
.parts-head {
  display: flex; flex-direction: column; align-items: stretch; gap: 4px;
  padding: 8px 10px 6px;
  font-size: 13px; font-weight: 600; color: var(--text);
}
.parts-head-row { display: flex; align-items: center; gap: 6px; }
.parts-count { font-size: 11px; font-weight: 400; color: var(--dim); flex: 1; }
.parts-close {
  align-self: center;
  border: 1px solid rgba(176,125,63,.35); background: rgba(176,125,63,.1);
  color: var(--accent); font-size: 11px; padding: 2px 8px; border-radius: 7px;
  cursor: pointer; transition: all .15s;
}
.parts-close:hover { background: rgba(176,125,63,.22); }
.parts-toggle {
  border: none; background: transparent; color: var(--dim);
  font-size: 16px; cursor: pointer; padding: 2px 6px; border-radius: 8px;
}
.parts-toggle:hover { background: rgba(70,58,42,.08); color: var(--text); }
.parts-body { display: flex; flex-direction: column; min-height: 0; }
.parts-list {
  flex: 1; overflow-y: auto; min-height: 60px; max-height: 96px; /* 3 行 */
  padding: 2px 6px;
  scrollbar-width: thin;
}
.parts-item {
  display: flex; align-items: center; justify-content: space-between; gap: 7px;
  padding: 5px 9px; border-radius: 8px;
  font-size: 12px; color: var(--text);
  cursor: pointer;
}
.parts-dot { width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0; border: 1px solid rgba(70,58,42,.25); box-shadow: inset 0 0 0 1px rgba(255,255,255,.28); }
.parts-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.parts-eye {
  flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 22px; border: none; border-radius: 7px;
  background: transparent; color: rgba(70,58,42,.55); cursor: pointer;
  transition: background .15s, color .15s;
}
.parts-eye:hover { background: rgba(70,58,42,.1); color: var(--text); }
.parts-item.part-hidden .parts-dot { opacity: .35; }
.parts-item.part-hidden .parts-eye { color: rgba(70,58,42,.35); }
.parts-item:hover { background: rgba(176,125,63,.1); }
.parts-item.active { background: rgba(176,125,63,.22); font-weight: 600; box-shadow: inset 0 0 0 1px rgba(176,125,63,.4); }
.parts-toggle { width: 14px; height: 14px; font-size: 10px; line-height: 14px; text-align: center; flex-shrink: 0; cursor: pointer; border-radius: 4px; color: rgba(70,58,42,.55); user-select: none; }
.parts-toggle:hover { background: rgba(176,125,63,.15); color: #b07d3f; }
.parts-sub-item { padding-left: 22px !important; }
.parts-dot-sm { width: 10px; height: 10px; }
.parts-actions {
  display: flex; flex-direction: column; gap: 6px;
  padding: 8px;
}
.parts-btn {
  padding: 6px 4px; border-radius: 9px; border: 1px solid var(--border);
  background: rgba(251,247,238,.85); color: var(--text);
  font-size: 12px; cursor: pointer; transition: all .15s;
}
.parts-btn:disabled { opacity: .45; cursor: not-allowed; }
.parts-btn:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }
.parts-btn.primary { background: rgba(176,125,63,.85); border-color: transparent; color: #fff; }
.parts-btn.primary:hover { background: rgba(176,125,63,1); color: #fff; }
.parts-btn.on { background: rgba(176,125,63,.9); border-color: transparent; color: #fff; }
.parts-btn.on:hover { background: rgba(176,125,63,1); color: #fff; }
.parts-explode-row {
  display: flex; align-items: center; gap: 3px;
  margin-top: 6px; padding: 4px 6px;
  border-radius: 9px; background: rgba(251,247,238,.6);
}
.explode-label { font-size: 11px; color: var(--text); white-space: nowrap; }
.explode-range { flex: 1 1 0; min-width: 0; width: auto; -webkit-appearance: none; appearance: none; height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, rgba(176,125,63,.35), rgba(176,125,63,.75)); outline: none; cursor: pointer;
  margin: 0 2px; /* 轨道两端留出滑块半径空间，滑块不会超出侧栏 */
  touch-action: none; /* 手机端拖动滑条不带动侧栏滚动 */ }
.explode-range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 2px solid var(--accent); box-shadow: 0 1px 4px rgba(70,58,42,.3); cursor: pointer; }
.explode-range::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 2px solid var(--accent); cursor: pointer; }
.explode-val { font-size: 11px; color: var(--accent); font-weight: 600; min-width: 26px; text-align: right; }
.explode-val .explode-input {
  width: 54px; font-size: 11px; font-weight: 600; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 6px; padding: 2px 4px;
  background: #fff; text-align: right; outline: none; box-sizing: border-box;
}
.move-pad {
  border-top: 1px dashed var(--border);
  padding: 8px 8px 10px;
  display: flex; flex-direction: column; gap: 5px; align-items: center;
}
.move-row { display: flex; gap: 6px; }
.move-btn {
  width: 44px; height: 26px; border-radius: 8px;
  border: 1px solid var(--border); background: rgba(251,247,238,.9);
  color: var(--text); font-size: 12px; cursor: pointer;
}
.move-btn:hover { border-color: var(--accent); color: var(--accent); }
.move-tip { font-size: 10px; color: var(--dim); }
/* 折叠态 */
.fs-parts-panel.collapsed .parts-body { display: none; }
.fs-parts-panel.collapsed .parts-toggle { transform: rotate(180deg); }
.fs-material-bar {
  position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 6;
  display: flex; flex-direction: row !important; align-items: center; gap: 12px;
  padding: 10px 16px;
  max-width: calc(100vw - 28px);
  background: rgba(251,247,238,.5);
  border: 1px solid rgba(255,255,255,.6);
  border-radius: 22px;
  backdrop-filter: blur(18px) saturate(1.5);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  box-shadow: 0 8px 30px rgba(70,58,42,.2);
}
.fs-material-bar[hidden] { display: none; }
.fs-bar-label { min-width: 92px; color: var(--text); font-size: 13px; font-weight: 600; }
.fs-bar-sub { font-size: 11px; color: var(--text-dim); font-weight: 400; margin-top: 2px; }
.fs-material-bar .restore-btn { width: auto; padding: 8px 14px; margin-top: 0; margin-left: auto; white-space: nowrap; }
.fs-material-bar .swatch { width: 46px; height: 46px; }

/* 高亮提示 */
.pick-hint {
  position: absolute; z-index: 5; pointer-events: none;
  color: #463a2a; font-size: 13px;
  background: rgba(251,247,238,.9); padding: 4px 10px; border-radius: 6px;
  border: 1px solid rgba(70,58,42,.2);
}

/* 布局切换按钮（页脚） */
.layout-toggle {
  margin-top: 14px;
  padding: 7px 18px; border-radius: 999px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-dim); font-size: 12px;
  cursor: pointer; transition: all .2s;
}
.layout-toggle:hover { color: var(--accent); border-color: var(--accent); background: rgba(176,125,63,.08); }

/* ---------- 手动切换布局：强制手机版 / 强制电脑版 ---------- */
/* 特异性高于媒体查询与主规则，可覆盖自动识别 */
html.forced-mobile .header-inner { padding: 12px 16px; }
html.forced-mobile .nav a { margin-left: 14px; font-size: 14px; }
html.forced-mobile .hero { padding: 48px 16px 28px; }
html.forced-mobile .hero h1 { font-size: 28px; letter-spacing: 1px; }
html.forced-mobile .hero-sub { font-size: 13px; }
html.forced-mobile .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
html.forced-mobile .products, html.forced-mobile .contact { padding: 0 16px 40px; }
html.forced-mobile .section-title { font-size: 18px; }
html.forced-mobile .card-name { font-size: 13px; padding: 6px 14px; margin-top: 8px; }
html.forced-mobile .contact-info { padding: 16px 18px; gap: 14px; }
html.forced-mobile .site-footer { padding: 20px 16px; font-size: 12px; }
html.forced-mobile .fs-tools-bar { bottom: 98px; gap: 6px; }
html.forced-mobile .fs-tool-btn { padding: 6px 11px; font-size: 11px; gap: 4px; }
html.forced-mobile .fs-material-bar { padding: 8px 10px; gap: 8px; }
html.forced-mobile .fs-bar-label { min-width: 0; font-size: 11px; }
html.forced-mobile .fs-bar-sub { display: none; }
html.forced-mobile .fs-material-bar .swatches { flex-wrap: nowrap; flex-direction: row !important; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
html.forced-mobile .fs-material-bar .swatches::-webkit-scrollbar { display: none; }
html.forced-mobile .fs-material-bar .swatch { width: 34px; height: 34px; flex-shrink: 0; }
html.forced-mobile .fs-material-bar .swatch-name { font-size: 8px; }
html.forced-mobile .fs-material-bar .restore-btn { padding: 6px 9px; font-size: 11px; }
html.forced-mobile .fs-hint { display: block; bottom: 140px; font-size: 11px; color: rgba(70,58,42,.55); }
/* 手机端：隐藏"我的配色"（电脑端保留） */
html.forced-mobile #fsBtnUser { display: none; }
/* 手机端：部件面板贴左、更窄更紧凑（面板展开时"部件"tab 已隐藏） */
html.forced-mobile .fs-parts-panel { left: 14px; width: 116px; max-height: 62vh; }
html.forced-mobile .parts-head { padding: 8px 10px 6px; font-size: 12px; }
html.forced-mobile .parts-toggle { display: none; }
html.forced-mobile .parts-head-row { justify-content: center; }
html.forced-mobile .parts-count { flex: none; }
html.forced-mobile .parts-item { padding: 4px 6px; }
html.forced-mobile .parts-btn { font-size: 11px; padding: 5px 2px; }
html.forced-mobile .parts-explode-row { padding: 3px 5px; }
html.forced-mobile .parts-explode-row .explode-label { display: none; }
html.forced-mobile .explode-val { font-size: 10px; }
html.forced-mobile .parts-actions { gap: 5px; padding: 6px; }
html.forced-mobile .parts-list { max-height: 84px; }

html.forced-desktop .header-inner { padding: 14px 24px; }
html.forced-desktop .nav a { margin-left: 28px; font-size: 15px; }
html.forced-desktop .hero { padding: 72px 24px 40px; }
html.forced-desktop .hero h1 { font-size: 40px; letter-spacing: 2px; }
html.forced-desktop .hero-sub { font-size: 15px; }
html.forced-desktop .card-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
html.forced-desktop .products, html.forced-desktop .contact { padding: 0 24px 60px; }
html.forced-desktop .section-title { font-size: 20px; }
html.forced-desktop .card-name { font-size: 15px; padding: 7px 18px; margin-top: 12px; }
html.forced-desktop .contact-info { padding: 22px 26px; gap: 20px; }
html.forced-desktop .site-footer { padding: 26px; font-size: 13px; }
html.forced-desktop .fs-tools-bar { bottom: 104px; gap: 10px; }
html.forced-desktop .fs-tool-btn { padding: 8px 16px; font-size: 13px; gap: 7px; }
html.forced-desktop .fs-material-bar { padding: 12px 18px; gap: 14px; }
html.forced-desktop .fs-bar-label { min-width: 92px; font-size: 13px; }
html.forced-desktop .fs-bar-sub { display: block; }
html.forced-desktop .fs-material-bar .swatches { flex-wrap: wrap; overflow-x: visible; }
html.forced-desktop .fs-material-bar .swatch { width: 46px; height: 46px; }
html.forced-desktop .fs-material-bar .swatch-name { font-size: 9px; }
html.forced-desktop .fs-material-bar .restore-btn { padding: 8px 14px; font-size: 13px; }
html.forced-desktop .fs-hint { display: block; bottom: 168px; font-size: 13px; color: rgba(70,58,42,.6); }

/* 轻量顶部提示 */
.fs-toast {
  position: fixed; top: 18px; left: 50%; transform: translateX(-50%) translateY(-10px);
  z-index: 9999;
  background: rgba(70,58,42,.88); color: #fdf8ee;
  font-size: 13px; padding: 8px 18px; border-radius: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}
.fs-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
/* 手机端：清屏时点小圆点后浮现的全功能模式按钮（圆点上方） */
.fs-btn-full {
  position: absolute; bottom: 58px; left: 50%; transform: translateX(-50%); z-index: 8;
  background: rgba(251,247,238,.6); border: 1px solid rgba(176,125,63,.4);
  color: var(--accent); font-size: 13px; font-weight: 600;
  padding: 9px 22px; border-radius: 24px; cursor: pointer;
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  box-shadow: 0 4px 18px rgba(70,58,42,.18);
  transition: all .2s;
}
.fs-btn-full:hover { background: rgba(176,125,63,.2); }
.fs-btn-full[hidden] { display: none; }
/* HDR 环境光选择面板：点击 HDR 按钮向上弹出 */
.fs-hdr-panel {
  position: absolute; left: 50%; transform: translateX(-50%);
  bottom: 168px; z-index: 9; width: 232px; max-height: 300px;
  display: flex; flex-direction: column;
  background: rgba(251,247,238,.92); border: 1px solid rgba(176,125,63,.35);
  border-radius: 14px; padding: 10px;
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 10px 30px rgba(70,58,42,.22);
  overflow: hidden;
}
.fs-hdr-panel[hidden] { display: none; }
.fs-hdr-head { font-size: 12px; color: var(--text-dim); letter-spacing: 2px; text-align: center; padding: 2px 0 8px; }
.fs-hdr-list { overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.fs-hdr-item {
  display: flex; align-items: center; gap: 8px;
  background: none; border: 1px solid transparent; border-radius: 8px;
  padding: 7px 10px; font-size: 13px; color: var(--text); cursor: pointer; text-align: left;
  transition: all .15s;
}
.fs-hdr-item:hover { background: rgba(176,125,63,.12); }
.fs-hdr-item.on { background: rgba(176,125,63,.2); border-color: rgba(176,125,63,.45); color: var(--accent); font-weight: 600; }
.fs-hdr-item .hdr-dot { width: 10px; height: 10px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #f5e3b8, #d9a94e 55%, #b07d3f); box-shadow: 0 0 6px rgba(217,169,78,.6); flex-shrink: 0; }
.fs-hdr-sep { height: 1px; background: rgba(70,58,42,.12); margin: 8px 4px; }
.fs-hdr-off {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: rgba(70,58,42,.07); border: 1px solid rgba(70,58,42,.18);
  border-radius: 9px; padding: 8px; font-size: 13px; color: var(--text); cursor: pointer;
  transition: all .15s;
}
.fs-hdr-off:hover { background: rgba(176,125,63,.16); color: var(--accent); }
.fs-hdr-off.on { background: rgba(176,125,63,.22); border-color: rgba(176,125,63,.5); color: var(--accent); font-weight: 600; }
.fs-hdr-off .dot-hdr-off { width: 10px; height: 10px; border-radius: 50%; background: rgba(70,58,42,.35); flex-shrink: 0; }
/* 进入全屏时的"双击切换"底部提示（5秒后自动淡出隐藏） */
.fs-hint-dbl {
  position: absolute; bottom: 54px; left: 50%; transform: translateX(-50%); z-index: 9;
  background: rgba(251,247,238,.6); border: 1px solid rgba(176,125,63,.35);
  color: var(--accent); font-size: 13px; font-weight: 500;
  padding: 8px 18px; border-radius: 20px;
  backdrop-filter: blur(12px) saturate(1.3);
  -webkit-backdrop-filter: blur(12px) saturate(1.3);
  box-shadow: 0 4px 16px rgba(70,58,42,.16);
  opacity: 1; transition: opacity .5s;
  pointer-events: none; white-space: nowrap;
}
.fs-hint-dbl[hidden] { display: none; }
.fs-hint-dbl.hide { opacity: 0; }
/* ---------- 手机端响应式（置于文件末尾，确保覆盖主规则） ---------- */
@media (max-width: 768px) {
  .header-inner { padding: 12px 16px; }
  .nav a { margin-left: 14px; font-size: 14px; }
  .hero { padding: 48px 16px 28px; }
  .hero h1 { font-size: 28px; letter-spacing: 1px; }
  .hero-sub { font-size: 13px; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .products, .contact { padding: 0 16px 40px; }
  .section-title { font-size: 18px; }
  .card-name { font-size: 13px; padding: 6px 14px; margin-top: 8px; }
  .contact-info { padding: 16px 18px; gap: 14px; }
  .site-footer { padding: 20px 16px; font-size: 12px; }
  /* 手机宽度（≤768px）材质栏一律横排，防止材质球在窄条内换行成竖排 */
  .fs-material-bar { padding: 8px 10px; gap: 8px; flex-direction: row !important; }
  .fs-bar-label { min-width: 0; font-size: 11px; }
  .fs-bar-sub { display: none; }
  .fs-material-bar .swatches { flex-wrap: nowrap; flex-direction: row !important; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .fs-material-bar .swatches::-webkit-scrollbar { display: none; }
  .fs-material-bar .swatch { width: 34px; height: 34px; flex-shrink: 0; }
  .fs-material-bar .swatch-name { font-size: 8px; }
  .fs-material-bar .restore-btn { padding: 6px 9px; font-size: 11px; }
}
@media (max-width: 520px) {
  .fs-tools-bar { bottom: 98px; gap: 6px; }
  .fs-tool-btn { padding: 6px 11px; font-size: 11px; gap: 4px; }
  /* 手机端显示触摸手势提示 */
  .fs-hint { display: block; bottom: 140px; font-size: 11px; color: rgba(70,58,42,.55); }
  /* 手机端：隐藏"我的配色"（电脑端保留） */
  #fsBtnUser { display: none; }
  /* 手机端：部件面板贴左、更窄更紧凑（面板展开时"部件"tab 已隐藏） */
  .fs-parts-panel { left: 14px; width: 116px; max-height: 62vh; }
  .parts-head { padding: 8px 10px 6px; font-size: 12px; }
  .parts-toggle { display: none; }
  .parts-head-row { justify-content: center; }
  .parts-count { flex: none; }
  .parts-item { padding: 4px 6px; }
  .parts-btn { font-size: 11px; padding: 5px 2px; }
  .parts-explode-row { padding: 3px 5px; }
  .parts-explode-row .explode-label { display: none; }
  .explode-val { font-size: 10px; }
  .parts-actions { gap: 5px; padding: 6px; }
  .parts-list { max-height: 84px; }
}

/* 全局模式切换按钮（产品展示标题下） */
.mode-toggle-wrap { text-align: center; margin: -6px 0 18px; }
.mode-toggle {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 26px; border-radius: 999px;
  background: #fff; color: var(--accent, #b07d3f);
  border: 1.5px solid var(--accent, #b07d3f);
  font-size: 15px; font-weight: 600; letter-spacing: 1px;
  cursor: pointer; transition: all .25s;
  box-shadow: 0 2px 8px rgba(176,125,63,.18);
}
.mode-toggle:hover { background: var(--accent, #b07d3f); color: #fff; transform: translateY(-1px); }
.mode-toggle:active { transform: translateY(0); }
.mode-toggle .load-ico { width: 16px; height: 16px; }


/* ===== 嵌入模式（XR 页面 iframe 内嵌）：只保留全屏 3D 查看器 ===== */
html.embed-mode .site-header,
html.embed-mode .hero,
html.embed-mode .mode-toggle-wrap,
html.embed-mode #contact,
html.embed-mode .site-footer { display: none !important; }
html.embed-mode #products { padding: 0; margin: 0; }
html.embed-mode #cardGrid { display: none !important; }
html.embed-mode #loadingHint { display: none !important; }
html.embed-mode body { overflow: hidden; }
html.embed-mode main { padding: 0; }