/* 史前故事（prehistory.html）：「缝线」时间轴 + 档案式故事卡 */
.pre-wrap{
  --pre-gutter:52px;          /* 左侧缝线走廊宽度（JS 会按实际宽度画路径） */
  --pre-gold:#b97d22;
  --pre-gold-soft:#d9a95c;
  --pre-line:rgba(200,145,47,.42);
  max-width:960px;margin:0 auto;padding:10px 3px 52px;
}
@media (max-width:560px){ .pre-wrap{--pre-gutter:38px;} }

.pre-empty{color:var(--muted);text-align:center;padding:40px 10px;font-size:15px;}
.pre-loading{color:var(--muted);text-align:center;padding:40px 10px;font-size:15px;}

/* 六位主角筛选标签：点选筛选，再点同一个取消 */
.pre-chars{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px;scroll-margin-top:12px;}
.pre-char{
  appearance:none;-webkit-appearance:none;border:1px solid rgba(200,145,47,.45);background:transparent;
  color:#9a6b2f;font-family:'American Typewriter','Courier New',monospace;
  font-size:13px;font-weight:700;letter-spacing:.3px;
  padding:6px 14px;border-radius:999px;cursor:pointer;transition:background .15s ease,color .15s ease,box-shadow .15s ease;
}
.pre-char:hover{background:rgba(200,145,47,.1);}
.pre-char:active{transform:translateY(1px);}
.pre-char.is-active{
  background:#c8912f;border-color:#c8912f;color:#fff;
  box-shadow:0 4px 12px rgba(200,145,47,.35);
}
body.theme-dark .pre-char{color:#e2b56b;}
body.theme-dark .pre-char:hover{background:rgba(200,145,47,.14);}
body.theme-dark .pre-char.is-active{color:#fff;}

/* ---------- 时间轴骨架 ---------- */
.pre-timeline{position:relative;}

/* 缝线：路径由 JS 生成；--grow 为滚动生长进度（默认全显，JS 未跑起来也不残缺） */
.pre-thread{
  --grow:100%;
  position:absolute;left:0;top:0;width:var(--pre-gutter);height:0;overflow:visible;pointer-events:none;z-index:0;
  -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 3%,#000 var(--grow),transparent calc(var(--grow) + 7%));
          mask-image:linear-gradient(180deg,transparent 0,#000 3%,#000 var(--grow),transparent calc(var(--grow) + 7%));
}
.pre-thread-main{fill:none;stroke:var(--pre-gold);stroke-width:1.7;stroke-linecap:round;opacity:.8;}
.pre-thread-stitch{ /* 相伴的针脚：虚线，走另一条相位 */
  fill:none;stroke:var(--pre-gold-soft);stroke-width:1;stroke-linecap:round;
  stroke-dasharray:1 8;opacity:.55;
}
.pre-thread-tick{stroke:var(--pre-gold);stroke-width:1.2;stroke-linecap:round;opacity:.55;
  transition:opacity .4s ease;}
.pre-thread-tick.is-off{opacity:0;}
body.theme-dark .pre-thread-main{stroke:#c8912f;opacity:.9;}
body.theme-dark .pre-thread-stitch{stroke:#e6bd72;opacity:.6;}
body.theme-dark .pre-thread-tick{stroke:#c8912f;opacity:.6;}

/* 结扣节点：坐在缝线上，缝线缝到它时才点亮 */
.pre-node{
  position:absolute;top:13px;left:18px;width:14px;height:14px;border-radius:50%;box-sizing:border-box;
  border:2px solid var(--pre-gold);background:#fff;
  transform:scale(.7);opacity:.4;
  transition:transform .38s cubic-bezier(.16,1,.3,1),opacity .38s ease,background .38s ease,box-shadow .38s ease;
}
.pre-node.is-lit{
  transform:scale(1);opacity:1;background:var(--pre-gold);
  box-shadow:0 0 0 4px rgba(200,145,47,.13),0 0 14px rgba(200,145,47,.42);
}

/* 年份分隔：像卷尺上的大刻度，年份居中、两侧细线对称 */
.pre-year{
  display:flex;align-items:center;justify-content:center;gap:14px;
  padding-left:var(--pre-gutter);margin:10px 0 18px;
}
.pre-year:first-child{margin-top:0;}
.pre-year-num{
  font-family:'American Typewriter','Courier New',monospace;
  font-size:22px;font-weight:700;line-height:1.15;letter-spacing:3px;color:var(--pre-gold);
  text-shadow:0 0 18px rgba(200,145,47,.22);
}
.pre-year-rule{flex:1;height:1px;background:linear-gradient(90deg,transparent,var(--pre-line));}
.pre-year-rule:last-child{background:linear-gradient(90deg,var(--pre-line),transparent);}

/* ---------- 故事卡 ---------- */
.pre-item{
  position:relative;padding-left:var(--pre-gutter);margin-bottom:16px;
  opacity:0;transform:translateY(12px);
  transition:opacity .55s cubic-bezier(.16,1,.3,1),transform .55s cubic-bezier(.16,1,.3,1);
}
.pre-item.is-in{opacity:1;transform:none;}

.pre-card{
  position:relative;overflow:hidden;border-radius:18px;padding:14px 16px 15px;
  background:linear-gradient(158deg,#fff 0%,#fdf8f1 100%);
  border:1px solid rgba(200,145,47,.2);
  box-shadow:0 8px 22px rgba(80,50,20,.07);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
/* 左侧竖金条 + 右上角柔光，档案卡质感 */
.pre-card::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,rgba(200,145,47,.6),rgba(200,145,47,.04));
}
.pre-card::after{
  content:"";position:absolute;right:-46px;top:-46px;width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,145,47,.13),transparent 68%);pointer-events:none;
}
.pre-card:hover{transform:translateY(-2px);border-color:rgba(200,145,47,.45);box-shadow:0 14px 30px rgba(80,50,20,.12);}

/* 日期 + 出处同一行，下划虚线分隔 */
.pre-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:10px;
  padding-bottom:9px;margin-bottom:11px;border-bottom:1px dashed rgba(200,145,47,.28);
}
.pre-time{
  font-family:'American Typewriter','Courier New',monospace;
  font-weight:700;font-size:16px;line-height:1.25;letter-spacing:.4px;color:var(--pre-gold);
}
.pre-event{
  white-space:pre-wrap;word-break:break-word;font-size:15px;line-height:1.9;color:#3a2c22;
}
.pre-source{
  flex:none;max-width:52%;padding:3px 9px;border-radius:999px;
  font-size:11.5px;line-height:1.5;color:#9a6b2f;background:rgba(200,145,47,.12);
  border:1px solid rgba(200,145,47,.3);
  font-family:'American Typewriter','Courier New',monospace;text-align:center;word-break:break-word;
}
/* 配图：卡片底部出血 */
.pre-img{margin:12px -16px -15px;}
.pre-img img{
  display:block;width:100%;max-height:440px;object-fit:cover;cursor:zoom-in;
  border-top:1px solid rgba(200,145,47,.18);
}

/* 暗色主题（prehistory.html 为 theme-dark） */
body.theme-dark .pre-node{border-color:#c8912f;background:#241d29;}
body.theme-dark .pre-node.is-lit{background:#c8912f;}
body.theme-dark .pre-year-num{color:#e0a94a;}
body.theme-dark .pre-card{
  background:linear-gradient(158deg,#2b2333 0%,#241d29 62%);
  border-color:rgba(200,145,47,.16);box-shadow:0 10px 26px rgba(0,0,0,.34);
}
body.theme-dark .pre-card:hover{border-color:rgba(200,145,47,.42);box-shadow:0 16px 34px rgba(0,0,0,.46);}
body.theme-dark .pre-event{color:#efe7f7;}
body.theme-dark .pre-time{color:#e0a94a;}
body.theme-dark .pre-source{color:#e2b56b;background:rgba(200,145,47,.14);border-color:rgba(226,181,107,.28);}
body.theme-dark .pre-img img{border-top-color:rgba(200,145,47,.16);}

@media (prefers-reduced-motion:reduce){
  .pre-item{opacity:1;transform:none;transition:none;}
  .pre-node{transition:none;}
  .pre-thread-tick{transition:none;}
}

/* 点图看大图 */
.pre-lightbox{
  position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;
  background:rgba(8,5,14,.82);backdrop-filter:blur(3px);padding:24px;cursor:zoom-out;
}
.pre-lightbox[hidden]{display:none;}
.pre-lightbox img{max-width:92vw;max-height:88vh;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.5);}

/* 回到顶部（同 movies / phoebesongs 视觉语言） */
.pre-backtop{
  position:fixed;right:18px;bottom:24px;width:46px;height:46px;border-radius:50%;border:none;
  background:rgba(109,74,166,.88);color:#fff;font-size:20px;cursor:pointer;
  box-shadow:0 8px 20px rgba(109,74,166,.4);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,visibility .2s ease,transform .2s ease;z-index:80;
}
.pre-backtop.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.pre-backtop:hover{background:var(--purple);}
.pre-backtop:active{transform:scale(.94);}

/* 副标题旁的说明按钮（ⓘ） */
.pre-info-btn{
  display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;
  margin-left:7px;padding:0;vertical-align:-3px;border:none;border-radius:50%;
  background:rgba(200,145,47,.14);color:#b97d22;cursor:pointer;
  transition:background .15s ease,color .15s ease,transform .15s ease;
}
.pre-info-btn:hover{background:#c8912f;color:#fff;}
.pre-info-btn:active{transform:scale(.9);}
body.theme-dark .pre-info-btn{background:rgba(200,145,47,.2);color:#e2b56b;}
body.theme-dark .pre-info-btn:hover{background:#c8912f;color:#fff;}

/* 说明弹窗：靠左对齐、长文本自动换行 */
.pre-info-modal{
  position:fixed;inset:0;z-index:95;display:flex;align-items:center;justify-content:center;
  padding:24px;background:rgba(8,5,14,.66);backdrop-filter:blur(2px);
}
.pre-info-modal[hidden]{display:none;}
.pre-info-panel{
  position:relative;width:min(520px,94vw);max-height:82vh;overflow:auto;
  border-radius:16px;padding:22px 22px 18px;text-align:left;
  background:#fff;border:1px solid #efe4d2;box-shadow:0 18px 50px rgba(0,0,0,.35);
}
body.theme-dark .pre-info-panel{background:#241d29;border-color:rgba(255,255,255,.08);box-shadow:0 18px 50px rgba(0,0,0,.55);}
.pre-info-x{
  position:absolute;top:10px;right:12px;width:28px;height:28px;padding:0;border:none;border-radius:50%;
  background:transparent;color:#a89a8c;font-size:20px;line-height:1;cursor:pointer;
}
.pre-info-x:hover{background:rgba(0,0,0,.06);color:#241c16;}
body.theme-dark .pre-info-x{color:#8f859b;}
body.theme-dark .pre-info-x:hover{background:rgba(255,255,255,.1);color:#fff;}
.pre-info-title{
  margin:0 0 12px;padding-right:28px;font-family:'American Typewriter','Courier New',monospace;
  font-size:15px;font-weight:700;letter-spacing:.4px;color:#b97d22;
}
body.theme-dark .pre-info-title{color:#e0a94a;}
.pre-info-list{margin:0;padding-left:22px;list-style:decimal;}
.pre-info-list li{
  padding:0 0 10px;font-size:14px;line-height:1.85;color:#241c16;
  white-space:normal;word-break:break-word;
}
.pre-info-list li:last-child{padding-bottom:0;}
body.theme-dark .pre-info-list li{color:#efe6f7;}
body.theme-dark .pre-info-list li::marker{color:#c8912f;}

/* 与 movies 一致的底部胶囊按钮，固定贴底并预留内容空间。 */
.app--home{padding-bottom:calc(80px + env(safe-area-inset-bottom, 0px));}
.fixed-bottom-nav .admin-link{
  color:#c9bff0;padding:8px 16px;border-radius:999px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
}
.fixed-bottom-nav .admin-link:hover{color:#fff;background:rgba(155,120,224,.22);}