/* ============================================================
   此山BOOK · 品牌主题（红 + 金）
   配色 / 字体 / 组件均参�? cishan-creative 品牌规范
   ============================================================ */
:root {
  /* —�? 品牌原色 —�? */
  --red-deep: #7B1A1A;
  --red-primary: #C62828;
  --red-bright: #E53935;
  --gold: #FFC107;
  --gold-light: #FFD54F;
  --gold-pale: #FFF8E1;
  --warm-beige: #F5E6D3;
  --bg-warm: #FDF8F2;
  --bg-cream: #F5E6D3;
  --text-dark: #3E2723;
  --text-mid: #6D4C41;
  --text-light: #A1887F;

  /* —�? 站点语义变量（映射品牌色）—�? */
  --accent: #C62828;          /* 主红 */
  --accent-2: #FFC107;        /* �? */
  --accent-soft: #FFD54F;     /* 浅金 */
  --text: #3E2723;            /* 深棕正文 */
  --text-on-red: #FFFFFF;     /* 红底反白文字 */
  --panel: rgba(255, 248, 242, 0.86);     /* 暖白面板 */
  --panel-solid: #FFFDFA;
  --panel-dark: rgba(26, 5, 5, 0.62);      /* 红底上的深色面板 */
  --panel-border: rgba(198, 40, 40, 0.22); /* 红描�? */
  --panel-border-gold: rgba(255, 193, 7, 0.55);
  --paper: #efe9da;
  /* 红底舞台（书册漂浮其上的展示感，呼应品牌 Hero 渐变�?*/
  --stage-grad: linear-gradient(160deg, #3E0000 0%, #7B1A1A 32%, #C62828 62%, #9B1B1B 100%);
  --grad-red: linear-gradient(135deg, #7B1A1A 0%, #C62828 50%, #E53935 100%);
  --grad-gold: linear-gradient(135deg, #E65100 0%, #FFC107 50%, #FFD54F 100%);
  --shadow-card: 0 10px 30px rgba(123, 26, 26, 0.16);
}

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

html, body { height: 100%; width: 100%; }

/* 阅读页：固定全屏 */
body { overflow: hidden; }

/* 首页：允许滚动（书架 + 联系�? + 页脚�?*/
body.page-home { overflow-x: hidden; overflow-y: auto; height: auto; min-height: 100%; }

body {
  font-family: 'Noto Sans SC', system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  display: flex;
  flex-direction: column;
  /* 暖色纸面背景 */
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(255, 213, 79, 0.10), rgba(0,0,0,0) 55%),
    linear-gradient(175deg, #FFFDFA 0%, #FDF8F2 50%, #F5E6D3 100%);
  position: relative;
}

/* 细微纸面颗粒，增强质�? */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== Loading ===== */
.loading {
  position: fixed; inset: 0; z-index: 60;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 18px; background: var(--stage-grad);
  transition: opacity 0.6s ease;
}
.loading.hidden { opacity: 0; pointer-events: none; }
.spinner {
  width: 54px; height: 54px; border-radius: 50%;
  border: 4px solid rgba(255, 213, 79, 0.25);
  border-top-color: var(--gold-light);
  animation: spin 0.9s linear infinite;
}
.loading-text { color: var(--gold-light); letter-spacing: 3px; font-size: 14px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Top bar ===== */
.topbar {
  position: relative; z-index: 20; flex: 0 0 auto; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 18px; background: var(--panel);
  border-bottom: 1px solid var(--panel-border); backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-logo { display: flex; align-items: center; }
.brand-logo img { height: 28px; width: auto; display: block; }
.brand-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px; font-weight: 700; letter-spacing: 1px;
  color: var(--red-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
/* logo-graphic.png 已包含品牌名，首页不再重复显示标�? */
.page-home .brand-title { display: none; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--panel-border); background: rgba(198,40,40,0.05);
  color: var(--red-primary); font-size: 16px; transition: all 0.2s;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: rgba(198,40,40,0.12); border-color: var(--accent); color: var(--red-deep); }

/* 装订方式切换（分段控件） */
.binding-switch {
  display: inline-flex; align-items: stretch; align-self: center;
  border: 1px solid var(--panel-border); border-radius: 10px; overflow: hidden;
  background: rgba(198,40,40,0.04);
}
.bs-opt {
  border: 0; background: transparent; color: var(--text-mid);
  font-family: inherit; font-size: 13px; letter-spacing: 1px;
  padding: 7px 12px; cursor: pointer; line-height: 1; transition: all 0.18s;
}
.bs-opt + .bs-opt { border-left: 1px solid var(--panel-border); }
.bs-opt:hover { background: rgba(198,40,40,0.10); color: var(--red-deep); }
.bs-opt.active {
  background: var(--grad-red);
  color: #fff; font-weight: 700;
}

/* ===== Stage / Book ===== */
.stage {
  position: relative; z-index: 10; flex: 1 1 auto; overflow: hidden;
  display: flex; align-items: center; justify-content: center; padding: 18px;
  /* 红底展示舞台 */
  background: var(--stage-grad);
}
.book-wrap {
  position: relative; display: inline-block; line-height: 0;
}
/* 落地软阴影：平摊径向椭圆，由 JS 实时贴合书尺寸/缩放并与书中心对齐，
   旋转时保持水平（不随书转）；落于背景(0)与书(2)之间(z-index:1)，
   避免 drop-shadow 滤镜叠出双重脏影 */
.book-shadow {
  position: absolute; z-index: 1; display: none;
  pointer-events: none; opacity: 0.95; filter: blur(4px);
  background: radial-gradient(ellipse 47% 50% at 50% 50%,
      rgba(0,0,0,0.42) 0%,
      rgba(0,0,0,0.16) 55%,
      rgba(0,0,0,0) 100%);
  transition: opacity 0.2s ease;
}
/* 装订叠加�? */
.book-overlay {
  /* 层级必须高于 turn.js 翻页卷层（其 z-index 随页数线性增长，实测 80+，会盖住中缝阴影/订书钉）。
     故抬到 9000，使其始终压在翻页动画之上，翻页过程中中缝特效不再被遮挡后闪现。
     本层 pointer-events:none 不拦截操作；固定层 UI（loading/上传弹窗 z-60/70）位于
     .stage(z-10) 之外的根级 fixed 层，不会被本层覆盖 */
  position: absolute; inset: 0; pointer-events: none; z-index: 9000;
  width: 100%; height: 100%;
}
.book-overlay > .gutter-shadow { height: 100%; }
.book-overlay > .staple { display: none; }
.book-overlay.binding-saddle > .staple { display: block; }
#book { touch-action: none; cursor: grab; }
#book:active { cursor: grabbing; }
.page {
  background-color: var(--paper);
  background-image: var(--paper-tex, none);
  background-size: var(--paper-size, auto);
  border-radius: var(--page-radius, 0);
  overflow: hidden;
  line-height: 0;
}
.page > img {
  width: 100%; height: 100%;
  object-fit: fill; display: block;
  -webkit-user-drag: none; user-select: none;
}
.page::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  box-shadow: inset 0 0 16px rgba(0,0,0,0.10), inset 0 0 2px rgba(0,0,0,0.18);
}
.page.hard {
  box-shadow: inset 0 0 0 9px var(--cover, rgba(123,26,26,0.92)), inset 0 0 0 10px rgba(0,0,0,0.35);
}
/* ���湤�գ�Ӳ�Ƿ������صľֲ��������߿򣨲����̽�/����/�̺��*/
.page.hard::before {
  content: ""; position: absolute; inset: 14px; pointer-events: none;
  border: 2.5px solid transparent;
  border-image: var(--cover-foil, none) 1;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.28));
  box-shadow: inset 0 0 3px rgba(255,255,255,0.4);
  background-image: none; /* 硬壳页材质纹理改由 ::after 叠加层承载，避免与烫金边冲突 */
}
#book.craft-none .page.hard::before { display: none; }

/* 每页轻微外投影，让画册像真实纸张浮在展台上（仅作用于静态页，不在翻页折叠层加 filter，
   否则会把 3D 折叠压平导致翻页透出底层） */
.turn-page-wrapper { box-shadow: 0 1px 6px rgba(0,0,0,0.14); }

/* ===== 内页纸张材质：真实质感纹理（叠加在页面图之上，mix-blend 透光）
   颜色取自行业常规；纹理经 mix-blend 混合，使纸张颗粒/光泽可见 ===== */
/* 普通白纸：纯白无纹理、无附加阴影特效（内页/封面的统一纯净默认）*/
#book.paper-plain   { --paper:#ffffff; --paper-tex:none; --paper-size:512px 512px; --paper-opacity:0; --paper-blend:normal; --cover:#e9e3d8; }
#book.paper-daolin   { --paper:#f3ecd6; --paper-tex:url("textures/paper-daolin.png"); --paper-size:512px 512px; --paper-opacity:0.5; --paper-blend:multiply; --cover:#caa56b; }
#book.paper-tongban  { --paper:#ffffff; --paper-tex:url("textures/paper-tongban.png"); --paper-size:512px 512px; --paper-opacity:0.22; --paper-blend:multiply; --cover:#b9b2a0; }
#book.paper-yafen    { --paper:#f7f6f2; --paper-tex:url("textures/paper-yafen.png"); --paper-size:512px 512px; --paper-opacity:0.5; --paper-blend:multiply; --cover:#c3bba8; }
#book.paper-baikao   { --paper:#ffffff; --paper-tex:url("textures/paper-baikao.png"); --paper-size:512px 512px; --paper-opacity:0.32; --paper-blend:multiply; --cover:#cfcabd; }
#book.paper-niupi    { --paper:#c9a877; --paper-tex:url("textures/paper-niupi.png"); --paper-size:512px 512px; --paper-opacity:0.6; --paper-blend:multiply; --cover:#6e4a25; }
#book.paper-xuan     { --paper:#f6f0e1; --paper-tex:url("textures/paper-xuan.png"); --paper-size:512px 512px; --paper-opacity:0.55; --paper-blend:multiply; --cover:#bda678; }
#book.paper-zhuguang { --paper:#f3eefb; --paper-tex:url("textures/paper-zhuguang.png"); --paper-size:512px 512px; --paper-opacity:0.6; --paper-blend:overlay; --cover:#b7ae9c; }
#book.paper-buwen    { --paper:#efe9da; --paper-tex:url("textures/paper-buwen.png"); --paper-size:512px 512px; --paper-opacity:0.6; --paper-blend:multiply; --cover:#bfa57f; }
#book.paper-zaisheng { --paper:#e8e1d0; --paper-tex:url("textures/paper-zaisheng.png"); --paper-size:512px 512px; --paper-opacity:0.65; --paper-blend:multiply; --cover:#a99e84; }

/* ===== 内页纸张质感叠加层（仅非硬壳页；盖在页面图之上，呈纸张颗粒/光泽）===== */
.page:not(.hard)::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 5;
  background-image: var(--paper-tex, none); background-size: var(--paper-size, auto);
  opacity: var(--paper-opacity, 0.12); mix-blend-mode: var(--paper-blend, multiply);
}
/* 普通白纸：去掉内页内阴影，呈现纯白无特效 */
#book.paper-plain .page::after { box-shadow: none; }

/* ===== 封面材质（新）：精装封面表面的材质纹路与底色，叠加在封面图之上 ===== */
/* 普通白纸：纯白无纹理无特效（封面默认）*/
#book.cover-plain { --cover:#e9e3d8; --cover-tex:none; --cover-size:512px 512px; --cover-opacity:0; --cover-blend:normal; }
#book.cover-plain .page.hard::after { box-shadow: none; }
/* 布面精装：细密织纹，磨砂哑光 */
#book.cover-cloth { --cover:#34506e; --cover-tex:url("textures/cover-cloth.png"); --cover-size:512px 512px; --cover-opacity:0.6; --cover-blend:multiply; }
/* 皮面精装：细腻皮纹颗粒，带微光 */
#book.cover-leather { --cover:#3a2a20; --cover-tex:url("textures/cover-leather.png"); --cover-size:512px 512px; --cover-opacity:0.55; --cover-blend:overlay; }
/* 珠光：珍珠幻彩光泽 */
#book.cover-pearl { --cover:#e9e2f0; --cover-tex:url("textures/cover-pearl.png"); --cover-size:512px 512px; --cover-opacity:0.65; --cover-blend:overlay; }
/* 触感纸：丝绒哑光，几乎无可见纹理 */
#book.cover-soft { --cover:#efe7da; --cover-tex:url("textures/cover-soft.png"); --cover-size:512px 512px; --cover-opacity:0.35; --cover-blend:multiply; }
/* 牛皮纸面：粗纤维棕黄 */
#book.cover-kraft { --cover:#b5895a; --cover-tex:url("textures/cover-kraft.png"); --cover-size:512px 512px; --cover-opacity:0.6; --cover-blend:multiply; }
/* 纸面精装：素白特种纸微纹 */
#book.cover-paper { --cover:#cfc6b3; --cover-tex:url("textures/cover-paper.png"); --cover-size:512px 512px; --cover-opacity:0.45; --cover-blend:multiply; }

/* 封面材质叠加层（硬壳页）：盖在封面图之上，呈现材质表面 */
.page.hard::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  box-shadow: inset 0 0 16px rgba(0,0,0,0.10), inset 0 0 2px rgba(0,0,0,0.18);
  background-image: var(--cover-tex, none); background-size: var(--cover-size, auto);
  opacity: var(--cover-opacity, 1);
  mix-blend-mode: var(--cover-blend, overlay);
}

/* ҳ��Բ�ǣ��ϴ�ʱ��ѡ��*/
#book.radius-0  { --page-radius: 0; }
#book.radius-8  { --page-radius: 8px; }
#book.radius-16 { --page-radius: 16px; }
#book.radius-24 { --page-radius: 24px; }

/* ���湤�գ��ϴ�ʱ��ѡ���ֲ��̽�/����/�̺��*/
#book.craft-none  { --cover-foil: none; }
#book.craft-gold  { --cover-foil: linear-gradient(135deg, #FFE9A8 0%, #D4AF37 22%, #FFF7CC 45%, #B8860B 68%, #F4D77E 100%); }
#book.craft-silver{ --cover-foil: linear-gradient(135deg, #FFFFFF 0%, #D2D6DB 22%, #F7F9FB 45%, #9BA0A8 68%, #E3E6EA 100%); }
#book.craft-rose  { --cover-foil: linear-gradient(135deg, #FFD9C2 0%, #E0A080 22%, #FFE9DC 45%, #C77B5A 68%, #F2B89A 100%); }

/* ===== 装订方式：书脊视�? ===== */
.gutter-shadow {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 64px; height: 100%; pointer-events: none; z-index: 25;
}
/* 骑马订：中缝柔和凹槽阴影（参考 FlippingBook Shadow Depth）。
   去掉生硬玻璃高光，改为真实翻开书册的暗槽；仅中缝留极细压痕高光 */
.book-overlay.binding-saddle .gutter-shadow {
  background: linear-gradient(to right,
    rgba(0,0,0,0) 0%,
    rgba(0,0,0,0.06) 28%,
    rgba(0,0,0,0.18) 45%,
    rgba(0,0,0,0.24) 50%,
    rgba(0,0,0,0.18) 55%,
    rgba(0,0,0,0.06) 72%,
    rgba(0,0,0,0) 100%);
}
.book-overlay.binding-saddle .gutter-shadow::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%;
  width: 1px; transform: translateX(-50%);
  background: rgba(255,255,255,0.5); opacity: 0.35;
}
.book-overlay.binding-glue .gutter-shadow {
  display: none;
}
/* 胶订第 1 页：书脊侧柔和压痕，单向向右渐隐。
   宽度与书脊偏移按整书宽度的百分比给出，使 H5 与 PC 占比一致
   （约 4.2% 单页宽：PC 22px/523px = 2.1% 整书宽；书脊右移 1.82% 整书宽 ~ PC 19px） */
.book-overlay.binding-glue.crease-on .gutter-shadow {
  display: block;
  left: calc(50% + 1.82%);
  transform: translateX(-50%);
  width: 2.1%;
  background: linear-gradient(90deg,
    rgba(0,0,0,0) 0%,
    rgba(0,0,0,0.10) 70%,
    rgba(0,0,0,0.18) 100%);
}
.staple {
  position: absolute; left: 0; transform: none;
  width: 8px; height: 20px; pointer-events: none;
}
.staple::before {
  content: ""; position: absolute; left: 50%; transform: translateX(-50%);
  top: 0; width: 1.5px; height: 100%;
  border-radius: 1px;
  background: linear-gradient(180deg, #f2f4f7 0%, #c2c8d0 55%, #8b919a 100%);
  box-shadow: 0 1px 1px rgba(0,0,0,0.4);
}
.staple-1 { top: 30%; }
.staple-2 { top: 36%; }
.staple-3 { top: 64%; }
.staple-4 { top: 70%; }

/* 单页：钉子落在页面左缘；双页跨页：书脊在中缝，钉子落在中缝（右页左缘/封面最左侧） */
.book-overlay.display-double .staple { left: 50%; transform: translateX(-50%); }

/* ===== Controls ===== */
.controls {
  position: relative; z-index: 20; flex: 0 0 auto; height: 64px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--panel); border-top: 1px solid var(--panel-border);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.ctrl-btn {
  min-width: 44px; height: 40px; padding: 0 12px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--panel-border); background: rgba(198,40,40,0.05);
  color: var(--red-primary); font-size: 16px; transition: all 0.18s;
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
  font-family: inherit;
}
.ctrl-btn:hover { background: rgba(198,40,40,0.12); border-color: var(--accent); color: var(--red-deep); transform: translateY(-1px); }
.ctrl-btn:active { transform: translateY(0); }
.ctrl-btn.auto { font-size: 13px; letter-spacing: 1px; color: var(--red-deep); border-color: var(--panel-border-gold); }
.ctrl-btn.auto.active {
  background: var(--grad-gold);
  color: #5a3b00; border-color: var(--gold); font-weight: 700;
}
.page-indicator {
  min-width: 78px; text-align: center; letter-spacing: 1px;
  font-variant-numeric: tabular-nums; font-size: 15px; color: var(--text-mid); padding: 0 6px;
}
#page-current { color: var(--red-primary); font-weight: 700; }
#btn-rotate { display: inline-flex; }

/* ===== 阅读器新工具栏（flbook 风格深色 chrome） ===== */
.page-view {
  background: #1a1a1a;
}
.page-view .stage {
  background: #262626;
}
.reader-topbar {
  position: relative; z-index: 20; flex: 0 0 auto; height: 52px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px; gap: 12px;
  background: #1f1f1f;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: #eee;
}
.rt-left, .rt-center, .rt-right {
  display: flex; align-items: center; gap: 10px; min-width: 0;
}
.rt-left { flex: 1 1 auto; }
.rt-center { flex: 0 1 auto; justify-content: center; }
.rt-right { flex: 1 1 auto; justify-content: flex-end; }
.rt-brand { display: flex; align-items: center; }
.rt-brand img { height: 26px; width: auto; display: block; }
.rt-title {
  font-family: 'Noto Serif SC', serif; font-size: 16px; font-weight: 700;
  color: #fff; letter-spacing: 1px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 220px;
}
.rt-icon {
  height: 36px; min-width: 36px; padding: 0 11px; border-radius: 8px; cursor: pointer;
  border: 1px solid rgba(255,255,255,0.10); background: rgba(255,255,255,0.04);
  color: #ddd; font-size: 13px; transition: all 0.18s;
  display: inline-flex; align-items: center; justify-content: center;
  flex: 0 0 auto; white-space: nowrap;
}
.rt-icon:hover { background: rgba(198,40,40,0.18); border-color: rgba(255,193,7,0.45); color: #fff; }
.rt-icon.muted { opacity: 0.5; }
.rt-icon.active { background: var(--grad-gold); color: #5a3b00; border-color: var(--gold); }
.rt-search { display: flex; align-items: center; gap: 0; }
.rt-search input {
  width: 180px; height: 32px; padding: 0 10px; border-radius: 6px 0 0 6px;
  border: 1px solid rgba(255,255,255,0.12); border-right: 0;
  background: rgba(0,0,0,0.25); color: #eee; font-size: 13px; outline: none;
}
.rt-search input::placeholder { color: rgba(255,255,255,0.35); }
.rt-search input:focus { border-color: var(--gold); background: rgba(0,0,0,0.35); }
.rt-search-btn {
  height: 32px; padding: 0 14px; border-radius: 0 6px 6px 0;
  border: 1px solid rgba(255,255,255,0.12); background: rgba(255,255,255,0.08);
  color: #ccc; font-size: 13px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; white-space: nowrap;
}
.rt-search-btn:hover { background: rgba(198,40,40,0.18); color: #fff; }
/* 阅读器顶部装订切换：暗色版 */
.reader-topbar .binding-switch { border-color: rgba(255,255,255,0.12); background: rgba(0,0,0,0.18); }
.reader-topbar .bs-opt { color: #bbb; font-size: 12px; padding: 6px 10px; letter-spacing: 0; }
.reader-topbar .bs-opt + .bs-opt { border-left-color: rgba(255,255,255,0.12); }
.reader-topbar .bs-opt:hover { background: rgba(255,255,255,0.08); color: #fff; }
.reader-topbar .bs-opt.active { background: var(--grad-red); color: #fff; }

/* 底部工具栏 */
.reader-bottombar {
  position: relative; z-index: 20; flex: 0 0 auto; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px; gap: 12px;
  background: #1f1f1f;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: #eee;
}
.rb-left, .rb-center, .rb-right {
  display: flex; align-items: center; gap: 8px; min-width: 0;
}
.rb-center { flex: 1 1 auto; justify-content: center; }
.rb-right { justify-content: flex-end; }
.rb-btn {
  height: 36px; padding: 0 12px; border-radius: 8px; cursor: pointer;
  border: 1px solid rgba(255,255,255,0.10); background: rgba(255,255,255,0.04);
  color: #ddd; font-size: 13px; transition: all 0.18s;
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  font-family: inherit; white-space: nowrap;
}
.rb-btn:hover { background: rgba(198,40,40,0.18); border-color: rgba(255,193,7,0.45); color: #fff; }
.rb-btn.active { background: var(--grad-gold); color: #5a3b00; border-color: var(--gold); font-weight: 700; }
.rb-btn.rb-icon { min-width: 36px; width: auto; padding: 0 10px; font-size: 13px; }
.rb-page {
  display: inline-flex; align-items: center; gap: 4px;
  color: #bbb; font-size: 14px; letter-spacing: 0.5px;
}
.rb-page input {
  width: 44px; height: 30px; text-align: center; border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.12); background: rgba(0,0,0,0.25);
  color: #fff; font-size: 14px; font-variant-numeric: tabular-nums;
}
.rb-page input:focus { outline: none; border-color: var(--gold); }

/* 左右翻页条 */
.flip-bar {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 90px; z-index: 15;
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; background: rgba(0,0,0,0.28); color: rgba(255,255,255,0.7);
  font-size: 28px; cursor: pointer; opacity: 0.55; transition: all 0.2s;
  pointer-events: auto;
}
.flip-bar:hover { opacity: 1; background: rgba(0,0,0,0.5); color: #fff; }
.flip-left { left: 0; border-radius: 0 8px 8px 0; }
.flip-right { right: 0; border-radius: 8px 0 0 8px; }

/* 目录抽屉 */
.catalog-drawer {
  position: absolute; top: 0; left: 0; bottom: 0; width: 280px; max-width: 80vw;
  z-index: 40;
  background: #1f1f1f; border-right: 1px solid rgba(255,255,255,0.08);
  display: flex; flex-direction: column; color: #eee;
  box-shadow: 6px 0 24px rgba(0,0,0,0.35);
}
.catalog-drawer[hidden] { display: none !important; }
.cd-header {
  flex: 0 0 auto; height: 50px; padding: 0 14px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.cd-title { font-size: 15px; font-weight: 700; letter-spacing: 1px; color: #fff; font-family: 'Noto Serif SC', serif; }
.cd-close {
  min-width: 32px; height: 32px; padding: 0 10px; border-radius: 6px; cursor: pointer;
  border: 1px solid rgba(255,255,255,0.10); background: transparent;
  color: #aaa; font-size: 13px; display: inline-flex; align-items: center; justify-content: center;
}
.cd-close:hover { color: #fff; background: rgba(255,255,255,0.08); }
.cd-list {
  flex: 1 1 auto; overflow-y: auto; padding: 12px; display: grid;
  grid-template-columns: repeat(2, 1fr); gap: 10px;
}
.cd-thumb {
  cursor: pointer; border-radius: 6px; overflow: hidden;
  border: 2px solid transparent; background: #2a2a2a;
  transition: all 0.15s; text-align: center;
}
.cd-thumb:hover { border-color: rgba(255,193,7,0.5); }
.cd-thumb.active { border-color: var(--red-primary); }
.cd-thumb img {
  width: 100%; aspect-ratio: 0.707; object-fit: cover; display: block;
}
.cd-thumb span {
  display: block; padding: 5px 0; font-size: 11px; color: #aaa;
}

/* 分享面板 */
.share-panel {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 320px; max-width: 90vw; z-index: 50;
  background: #1f1f1f; border: 1px solid rgba(255,255,255,0.10);
  border-radius: 14px; color: #eee;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.share-panel[hidden] { display: none !important; }
.sp-header {
  height: 48px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sp-title { font-size: 15px; font-weight: 700; letter-spacing: 1px; color: #fff; font-family: 'Noto Serif SC', serif; }
.sp-close { min-width: 30px; height: 30px; padding: 0 10px; border-radius: 6px; cursor: pointer;
  border: 1px solid rgba(255,255,255,0.10); background: transparent;
  color: #aaa; font-size: 13px; display: inline-flex; align-items: center; justify-content: center;
}
.sp-close:hover { color: #fff; background: rgba(255,255,255,0.08); }
.sp-body { padding: 18px; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.sp-qrcode { width: 140px; height: 140px; padding: 8px; background: #fff; border-radius: 8px; }
.sp-qrcode img { width: 100%; height: 100%; object-fit: contain; display: block; }
.sp-link { width: 100%; }
.sp-link input {
  width: 100%; height: 34px; padding: 0 10px; border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.12); background: rgba(0,0,0,0.25);
  color: #ddd; font-size: 13px;
}
.sp-copy {
  width: 100%; height: 38px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--red-primary); background: var(--grad-red);
  color: #fff; font-weight: 700; font-size: 14px; letter-spacing: 1px;
}

/* 预览版角标在阅读器模式下融入顶部 */
.page-view .preview-badge {
  top: 58px; right: 10px; z-index: 21;
  background: rgba(198,40,40,0.85); color: #fff;
}

/* ===== 移动端自适应（≤767px：单页显示，书脊/订书钉落在左侧装订边�?===== */
@media (max-width: 767px) {
  /* 阅读器移动端适配 */
  .reader-topbar { height: 48px; padding: 0 10px; gap: 8px; }
  .reader-topbar .rt-center { display: none; }
  .reader-topbar .rt-title { max-width: 120px; font-size: 14px; }
  .reader-topbar .rt-brand img { height: 22px; }
  .reader-topbar .binding-switch,
  .reader-topbar #btn-zoom-out,
  .reader-topbar #btn-zoom-in,
  .reader-topbar #btn-auto { display: none; }
  .rt-icon { min-width: 32px; width: auto; height: 32px; padding: 0 8px; font-size: 13px; }

  .reader-bottombar { height: 52px; padding: 0 8px; gap: 6px; }
  .reader-bottombar .rb-right #btn-auto2,
  .reader-bottombar .rb-right #btn-rotate2 { display: none; }
  .rb-btn { height: 32px; padding: 0 9px; font-size: 12px; }
  .rb-btn.rb-icon { width: auto; min-width: 32px; padding: 0 8px; font-size: 13px; }
  .rb-page input { width: 38px; height: 28px; font-size: 13px; }

  .flip-bar { width: 34px; height: 72px; font-size: 22px; opacity: 0.45; }

  .catalog-drawer { width: 260px; max-width: 85vw; }
  .cd-list { grid-template-columns: repeat(2, 1fr); padding: 10px; gap: 8px; }

  .share-panel { width: 300px; }

  .topbar { height: auto; flex-wrap: wrap; padding: 8px 10px; gap: 8px; }
  .brand { gap: 6px; }
  .brand-logo img { height: 24px; }
  .brand-title { font-size: 14px; }
  .icon-btn { width: 32px; height: 32px; font-size: 15px; }
  .topbar-actions { gap: 7px; }
  .binding-switch { align-self: center; }
  .bs-opt { font-size: 11px; padding: 5px 8px; letter-spacing: 0; }
  #btn-fullscreen { display: none; }
  .topbar-actions .ctrl-btn.auto { font-size: 12px; padding: 0 8px; height: 32px; }

  /* H5 版特效定位与 PC 一致：书脊中缝（居中），不再做手机端特例 */

  .stage { padding: 10px; }

  #btn-first, #btn-last { display: none; }
  .controls { gap: 8px; height: 58px; padding: 0 8px; }
  .ctrl-btn { min-width: 40px; height: 38px; font-size: 15px; padding: 0 9px; }
  .ctrl-btn.auto { font-size: 12px; }
  .page-indicator { font-size: 13px; min-width: 64px; }

  .uz-inner { padding: 34px 18px; }
  .uz-title { font-size: 19px; }
  .uz-sub { font-size: 13px; margin: 8px 0 14px; }
  .uz-btn { padding: 9px 22px; font-size: 14px; }
  .upload-options { padding: 18px 16px 14px; }
  .shelf { padding: 0 14px; }
  .shelf-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 14px; }
  .shelf-head h2 { font-size: 17px; }
}
@media (max-width: 480px) {
  .bs-opt { padding: 5px 6px; }
  .topbar-actions .ctrl-btn.auto { padding: 0 6px; }
  .ctrl-btn { min-width: 38px; padding: 0 7px; }
  .page-indicator { min-width: 58px; }
}

/* ===== 首页 / 上传 / 书架 ===== */
.home-stage {
  flex: 0 0 auto; padding: 28px 18px; min-height: auto;
  flex-direction: column; align-items: center; justify-content: flex-start;
}
.upload-zone {
  width: 100%; max-width: 720px; margin: 0 auto;
  border: 2px dashed rgba(198,40,40,0.40); border-radius: 18px;
  background: var(--panel); transition: all 0.2s; cursor: pointer;
  box-shadow: var(--shadow-card);
}
.upload-zone.dragover { border-color: var(--red-primary); background: rgba(255,213,79,0.16); transform: scale(1.01); }
.uz-inner { padding: 46px 24px; text-align: center; }
.uz-icon { font-size: 40px; color: var(--red-primary); margin-bottom: 10px; font-weight: 700; }
.uz-title { font-size: 22px; font-weight: 700; letter-spacing: 1px; color: var(--text-dark); font-family: 'Noto Serif SC', serif; }
.uz-sub { margin: 10px 0 18px; color: var(--text-mid); font-size: 14px; }
.uz-btn {
  border: 1px solid var(--red-primary); background: var(--grad-red);
  color: #fff; font-weight: 700; font-size: 15px; letter-spacing: 1px;
  padding: 10px 26px; border-radius: 10px; cursor: pointer; transition: all 0.18s;
}
.uz-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(198,40,40,0.30); }
.uz-hint { margin-top: 16px; font-size: 12px; color: var(--text-light); text-align: center; }
/* 上传选项面板：独立于拖放区，避免功能控件堆叠在「把 PDF 拖到这里」位置 */
.upload-options {
  width: 100%; max-width: 720px; margin: 18px auto 0;
  background: var(--panel); border: 1px solid var(--panel-border); border-radius: 16px;
  padding: 22px 24px 18px; box-shadow: var(--shadow-card);
}
.uo-head {
  font-family: 'Noto Serif SC', serif; font-weight: 700; font-size: 16px;
  color: var(--red-deep); letter-spacing: 1px; text-align: center; margin-bottom: 18px;
}
.uo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 22px; }
.uz-field.wide { grid-column: 1 / -1; }
@media (max-width: 767px) {
  .uo-grid { grid-template-columns: 1fr; gap: 14px; }
}
.uz-field.wide .uz-input { max-width: 360px; }
/* �ϴ�����װ����ʽѡ�� */
.uz-field { margin: 6px auto 4px; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.uz-label { font-size: 13px; color: var(--text-mid); letter-spacing: 0.08em; }
.uz-binding { border-color: var(--panel-border-gold); }
/* �ϴ�����ֽ�Ų������� */
.uz-select {
  width: 100%; max-width: 320px; margin: 0 auto 4px; display: block;
  padding: 10px 14px; border-radius: 10px; border: 1px solid var(--panel-border);
  background: #fff; color: var(--text-dark); font-size: 14px;
  font-family: inherit; text-align: center; cursor: pointer;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23C62828' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 34px;
}
.uz-select:focus { outline: none; border-color: var(--red-primary); background-color: var(--gold-pale); }
.progress-wrap { padding: 44px 30px; }
.progress-label { text-align: center; color: var(--red-deep); margin-bottom: 12px; letter-spacing: 1px; font-weight: 600; }
.progress-bar { height: 10px; border-radius: 6px; background: rgba(198,40,40,0.12); overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: var(--grad-red); transition: width 0.2s; }
.upload-err { padding: 18px 24px; color: #d32f2f; text-align: center; font-size: 14px; }

.shelf { max-width: 1100px; margin: 8px auto 50px; padding: 0 18px; }
.shelf-head { display: flex; align-items: baseline; gap: 12px; margin: 6px 0 16px; }
.shelf-head h2 { font-size: 19px; font-weight: 700; letter-spacing: 1px; color: var(--red-deep); font-family: 'Noto Serif SC', serif; }
.shelf-count { color: var(--text-mid); font-size: 13px; }
.shelf-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 18px;
}
.shelf-empty { opacity: 0.55; font-size: 14px; padding: 20px 4px; color: var(--text-mid); }
.book-card {
  background: var(--panel-solid); border: 1px solid var(--panel-border); border-radius: 12px;
  overflow: hidden; display: flex; flex-direction: column; transition: all 0.2s;
  box-shadow: 0 4px 14px rgba(123,26,26,0.10);
}
.book-card:hover { transform: translateY(-3px); border-color: var(--red-primary); box-shadow: var(--shadow-card); }
.book-cover { aspect-ratio: 3 / 4; background: #efe7da center/cover no-repeat; position: relative; }
.book-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.book-cover .preview-tag {
  position: absolute; top: 8px; left: 8px; font-size: 11px; padding: 2px 8px; border-radius: 6px;
  background: rgba(26,5,5,0.6); color: var(--gold-light); border: 1px solid var(--panel-border-gold);
}
.book-meta { padding: 10px 12px 12px; }
.book-name { font-weight: 700; font-size: 14px; line-height: 1.4; height: 2.8em; overflow: hidden; color: var(--text-dark); }
.book-sub { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.book-actions { display: flex; gap: 8px; margin-top: 10px; }
.book-actions .mini {
  flex: 1; font-size: 12px; padding: 7px 0; border-radius: 8px; cursor: pointer; text-align: center;
  border: 1px solid var(--panel-border); background: rgba(198,40,40,0.05); color: var(--red-primary); transition: all 0.15s;
}
.book-actions .mini:hover { background: rgba(198,40,40,0.12); border-color: var(--accent); }
.book-actions .mini.danger:hover { background: rgba(211,47,47,0.12); border-color: #d32f2f; color: #d32f2f; }

/* 预览版角�? */
.preview-badge {
  position: absolute; top: 64px; right: 14px; z-index: 30; pointer-events: none;
  font-size: 12px; letter-spacing: 1px; padding: 4px 10px; border-radius: 8px;
  background: rgba(26,5,5,0.6); color: var(--gold-light); border: 1px solid var(--panel-border-gold);
}

/* 通用 toast */
.toast {
  position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%);
  background: var(--red-deep); color: #fff; padding: 12px 22px; border-radius: 10px;
  border: 1px solid var(--panel-border-gold); z-index: 80; font-size: 14px; letter-spacing: 0.5px;
  box-shadow: 0 10px 30px rgba(123,26,26,0.4);
}

/* ===== 上传区：密码输入 ===== */
.uz-input {
  width: 100%; max-width: 320px; margin: 0 auto 4px; display: block;
  padding: 10px 14px; border-radius: 10px; border: 1px solid var(--panel-border);
  background: #fff; color: var(--text-dark); font-size: 14px;
  font-family: inherit; text-align: center;
}
.uz-input::placeholder { color: rgba(109,76,65,0.55); }
.uz-input:focus { outline: none; border-color: var(--red-primary); background: var(--gold-pale); }

/* 书架：加密标�? */
.lock-tag {
  position: absolute; top: 8px; right: 8px; font-size: 11px; padding: 2px 8px; border-radius: 6px;
  background: rgba(26,5,5,0.6); color: var(--gold-light); border: 1px solid var(--panel-border-gold);
}

/* ===== 密码�? ===== */
.pwd-gate {
  position: fixed; inset: 0; z-index: 70;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  background: var(--stage-grad); backdrop-filter: blur(4px);
}
.pwd-gate[hidden] { display: none !important; }
.pwd-box {
  width: 100%; max-width: 340px; padding: 28px 24px; text-align: center;
  background: var(--panel-solid); border: 1px solid var(--panel-border-gold); border-radius: 16px;
  box-shadow: 0 20px 50px rgba(26,5,5,0.5);
}
.pwd-title { font-size: 18px; font-weight: 700; letter-spacing: 1px; color: var(--red-deep); font-family: 'Noto Serif SC', serif; }
.pwd-sub { margin: 8px 0 18px; font-size: 13px; color: var(--text-mid); }
.pwd-input {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--panel-border);
  background: #fff; color: var(--text-dark); font-size: 15px; text-align: center;
  font-family: inherit;
}
.pwd-input:focus { outline: none; border-color: var(--red-primary); background: var(--gold-pale); }
.pwd-btn {
  width: 100%; margin-top: 14px; padding: 12px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--red-primary); background: var(--grad-red);
  color: #fff; font-weight: 700; font-size: 15px; letter-spacing: 1px;
}
.pwd-btn:disabled { opacity: 0.6; cursor: default; }
.pwd-error { margin-top: 12px; min-height: 18px; color: #d32f2f; font-size: 13px; }

/* ============================================================
   首页：联系我们（品牌规范 §2.15�?+ 深色�? Footer（�?2.14�?
   �? emoji · 联系信息：李�? / 13395696376 / 微信二维�?
   ============================================================ */
.contact-band {
  background: var(--bg-cream);
  padding: clamp(2.5rem, 6vh, 4rem) 2rem;
  text-align: center;
}
.contact-kicker {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.5rem; font-weight: 700; color: var(--red-deep);
  letter-spacing: 0.12em; margin-bottom: 1.4rem;
}
.contact-kicker::after {
  content: ""; display: block; width: 42px; height: 3px; margin: 12px auto 0;
  background: var(--grad-gold); border-radius: 2px;
}
.contact-card {
  display: inline-flex; align-items: center; gap: clamp(1.6rem, 4vw, 3rem);
  background: #fff; border-radius: 14px;
  padding: clamp(1.6rem, 3vw, 2.4rem) clamp(1.8rem, 4vw, 3rem);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 14px 44px rgba(123,26,26,0.10);
  border-top: 3px solid var(--gold);
}
.contact-info { text-align: left; }
.contact-name {
  font-family: 'Noto Serif SC', serif; font-size: 1.3rem; font-weight: 700;
  color: var(--text-dark); margin-bottom: 0.3rem;
}
.contact-phone {
  font-family: 'Noto Sans SC', system-ui, sans-serif; font-size: 1.1rem; font-weight: 500;
  color: var(--red-primary); letter-spacing: 0.04em;
}
.contact-tip { font-size: 0.8rem; color: var(--text-light); margin-top: 0.6rem; letter-spacing: 0.06em; }
.contact-qrcode {
  width: 120px; height: 120px; border-radius: 8px;
  border: 1px solid rgba(0,0,0,0.08); display: block;
}
.contact-qrcode-wrap { text-align: center; }
.contact-qrcode-cap { font-size: 0.75rem; color: var(--text-light); margin-top: 6px; letter-spacing: 0.06em; }

.site-footer {
  background: #1A0505;
  padding: clamp(3rem, 8vh, 5rem) 2rem;
  text-align: center;
  position: relative; overflow: hidden;
}
.site-footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), var(--red-bright), var(--gold), transparent);
}
.footer-logo {
  width: 72px; margin: 0 auto 1rem; display: block;
  filter: brightness(0) invert(1);
}
.footer-line { width: 40px; height: 1px; background: var(--gold); margin: 1.2rem auto; opacity: 0.5; }
.footer-info {
  font-size: 0.82rem; color: rgba(255,255,255,0.55); letter-spacing: 0.08em; line-height: 2;
}
.footer-info .brand-en { color: var(--gold-light); letter-spacing: 0.18em; font-size: 0.72rem; }
.footer-year { margin-top: 0.6rem; font-size: 0.72rem; color: rgba(255,255,255,0.4); letter-spacing: 0.06em; }

@media (max-width: 768px) {
  .contact-card { flex-direction: column; text-align: center; }
  .contact-info { text-align: center; }
}

/* ===== 首页全局门禁弹窗（从首页点进手册前需输入默认密码）===== */
.gate-mask {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: rgba(18, 22, 31, 0.72); backdrop-filter: blur(2px);
}
.gate-mask[hidden] { display: none !important; }
.gate-box {
  width: 320px; max-width: 90vw; background: #fff; border-radius: 16px;
  padding: 28px 26px; text-align: center; box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
}
.gate-title { font-weight: 700; font-size: 18px; color: #1f2937; margin-bottom: 6px; }
.gate-sub { font-size: 13px; color: #6b7280; margin-bottom: 18px; }
.gate-input {
  width: 100%; box-sizing: border-box; padding: 11px 12px; margin-bottom: 12px;
  border: 1px solid #d1d5db; border-radius: 9px; font-size: 15px; outline: none;
}
.gate-input:focus { border-color: #34506e; }
.gate-btn {
  width: 100%; padding: 11px; border: none; border-radius: 9px;
  background: #34506e; color: #fff; font-size: 15px; cursor: pointer;
}
.gate-btn:hover { background: #2a4260; }
.gate-btn:disabled { opacity: 0.6; cursor: default; }
.gate-error { color: #dc2626; font-size: 13px; margin-top: 10px; min-height: 18px; }
.gate-close {
  margin-top: 10px; background: none; border: none; color: #9ca3af;
  font-size: 13px; cursor: pointer; text-decoration: underline;
}

/* ===== 翻页声音开关：右下角悬浮显眼按钮 ===== */
.float-sound {
  position: fixed; right: 18px; bottom: 84px; z-index: 9990;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 11px 16px; border: none; border-radius: 999px;
  background: #34506e; color: #fff; font-size: 14px; font-weight: 600;
  line-height: 1; white-space: nowrap; cursor: pointer;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.30);
  transition: transform .12s ease, background .15s ease, filter .15s ease;
}
.float-sound:hover { transform: translateY(-1px) scale(1.03); filter: brightness(1.08); }
.float-sound:active { transform: scale(0.97); }
.float-sound.muted { background: #9aa3af; }
.float-sound { font-family: "Noto Sans SC", system-ui, sans-serif; }

/* ===== 动态背景画布 + 背景选择面板（融合妙网 canvas-bg 引擎）===== */
#bgCanvas {
  position: absolute; inset: 0; z-index: 0; display: none;
  width: 100%; height: 100%; pointer-events: none;
}
body.has-canvas-bg .stage { background: transparent !important; }
body.has-canvas-bg #bgCanvas { display: block; }
/* 书与翻页感应条置于背景之上 */
.book-wrap { position: relative; z-index: 2; }
.flip-bar { z-index: 3; }

.bg-panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: 320px; max-width: 86vw;
  z-index: 45; background: #1f1f1f; border-left: 1px solid rgba(255,255,255,0.08);
  display: flex; flex-direction: column; color: #eee;
  box-shadow: -6px 0 24px rgba(0,0,0,0.35);
}
.bg-panel[hidden] { display: none !important; }
.bgp-header {
  flex: 0 0 auto; height: 50px; padding: 0 14px;
  display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.bgp-title { font-size: 15px; font-weight: 700; letter-spacing: 1px; color: #fff; font-family: 'Noto Serif SC', serif; }
.bgp-hint { font-size: 11px; color: #8a8f98; flex: 1 1 auto; }
.bgp-close {
  min-width: 32px; height: 32px; padding: 0 10px; border-radius: 6px; cursor: pointer;
  border: 1px solid rgba(255,255,255,0.10); background: transparent;
  color: #aaa; font-size: 13px; display: inline-flex; align-items: center; justify-content: center;
}
.bgp-close:hover { color: #fff; background: rgba(255,255,255,0.08); }
.bgp-grid {
  flex: 1 1 auto; overflow-y: auto; padding: 12px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; align-content: start;
}
.bg-cell {
  cursor: pointer; border-radius: 6px; padding: 10px 4px; min-height: 46px;
  border: 2px solid transparent; background: #2a2a2a; color: #cfd3da;
  font-size: 12px; text-align: center; line-height: 1.3;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.bg-cell:hover { border-color: rgba(255,193,7,0.5); color: #fff; }
.bg-cell.active { border-color: var(--red-primary); color: #fff; background: rgba(198,40,40,0.18); }
.bg-cell.bg-none { background: #333; color: #ffd479; font-weight: 700; }

@media (max-width: 767px) {
  .bg-panel { width: 280px; }
  .bgp-grid { grid-template-columns: repeat(2, 1fr); }
}