/* ===================================================================
   电科普空间站 · 电力发展简史模块 共享样式
   被 history.html（时间轴） 与 historyXXXX.html（事件详情页）共同引用
   调色板与首页一致，便于统一修改
   =================================================================== */
:root{
  --bg-0:#05081a; --bg-1:#0a1230; --bg-2:#0d1a3f;
  --cyan:#34e3ff; --blue:#4d7cff; --amber:#ffcf3f; --violet:#9d7bff;
  --text:#eaf1ff; --muted:#93a6cf;
  --line:rgba(120,180,255,.16); --glass:rgba(255,255,255,.045);
  --r-lg:22px; --r-md:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:var(--bg-0);color:var(--text);
  line-height:1.75;overflow-x:hidden;-webkit-font-smoothing:antialiased}
.font-display{font-family:"Orbitron","Noto Sans SC",sans-serif;letter-spacing:.04em}
a{color:inherit;text-decoration:none}
::selection{background:rgba(52,227,255,.3);color:#fff}

/* 背景 */
.bg-fx{position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1200px 700px at 78% -8%,rgba(52,227,255,.18),transparent 60%),
    radial-gradient(900px 600px at 8% 18%,rgba(77,124,255,.16),transparent 60%),
    radial-gradient(800px 700px at 50% 120%,rgba(255,207,63,.08),transparent 55%),
    linear-gradient(180deg,var(--bg-0),var(--bg-1) 45%,var(--bg-2));}
.bg-grid{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.45;
  background-image:linear-gradient(rgba(120,180,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,255,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(5,8,26,.85),rgba(5,8,26,.45));border-bottom:1px solid var(--line)}
.nav-inner{max-width:1100px;margin:0 auto;padding:14px 26px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:18px}
.brand .mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;
  background:radial-gradient(circle at 35% 30%,rgba(52,227,255,.35),rgba(77,124,255,.18));
  border:1px solid rgba(52,227,255,.4);box-shadow:0 0 40px rgba(52,227,255,.35)}
.brand .mark svg{width:20px;height:20px}
.back{padding:9px 18px;border-radius:999px;font-size:14px;font-weight:700;color:var(--cyan);
  border:1px solid rgba(52,227,255,.4);background:rgba(52,227,255,.07);transition:.25s;white-space:nowrap}
.back:hover{background:rgba(52,227,255,.15);transform:translateY(-1px)}
.nav-links{display:flex;gap:6px}
.nav-links a{padding:8px 12px;border-radius:999px;font-size:13.5px;color:var(--muted);transition:.25s;white-space:nowrap}
.nav-links a:hover{color:var(--text);background:var(--glass)}
@media(max-width:820px){.nav-links{display:none}}

/* ============ 事件详情页 ============ */
.ev-wrap{max-width:900px;margin:0 auto;padding:32px 26px 90px}
.ev-crumb{font-family:"Orbitron",sans-serif;font-size:12px;letter-spacing:.18em;color:var(--muted);
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.ev-crumb .dot{width:6px;height:6px;border-radius:50%;background:var(--amber)}
.ev-hero{text-align:center;padding:26px 0 4px}
.ev-year{font-family:"Orbitron",sans-serif;font-weight:900;line-height:1;
  font-size:clamp(52px,13vw,120px);letter-spacing:.02em;
  background:linear-gradient(120deg,var(--cyan),var(--blue) 60%,var(--amber));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 26px rgba(52,227,255,.3))}
.ev-hero h1{font-size:clamp(24px,4vw,40px);font-weight:900;margin:14px 0 12px}
.ev-sub{color:var(--muted);font-size:16.5px;max-width:660px;margin:0 auto}
.ev-illus{display:grid;place-items:center;margin:34px 0 6px}
.ev-illus svg{width:min(380px,88%);height:auto;filter:drop-shadow(0 0 30px rgba(52,227,255,.28))}

/* 主视觉大图 */
.ev-photo{position:relative;margin:34px 0 6px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(52,227,255,.24);background:#0a1230;isolation:isolate;
  box-shadow:0 28px 64px rgba(0,0,0,.55),0 0 70px rgba(52,227,255,.12)}
.ev-photo::after{content:"";position:absolute;inset:0;pointer-events:none;
  box-shadow:inset 0 0 90px rgba(52,227,255,.10);border-radius:inherit}
.ev-photo img{display:block;width:100%;height:auto;transition:transform .8s cubic-bezier(.22,.61,.36,1)}
.ev-photo:hover img{transform:scale(1.035)}
.ev-photo .badge{position:absolute;top:14px;left:14px;z-index:2;padding:5px 13px;border-radius:999px;
  font-family:"Orbitron",sans-serif;font-size:11px;letter-spacing:.14em;font-weight:700;color:#04122b;
  background:linear-gradient(135deg,var(--cyan),var(--blue));box-shadow:0 6px 20px rgba(0,0,0,.45)}
.ev-photo figcaption{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:30px 22px 15px;
  font-size:13.5px;color:#e2ecff;line-height:1.6;
  background:linear-gradient(180deg,transparent,rgba(4,10,26,.9))}

/* 正文实景插图 */
.ev-figure{margin:28px 0;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);background:#0a1230;
  box-shadow:0 16px 40px rgba(0,0,0,.4)}
.ev-figure img{display:block;width:100%;height:auto}
.ev-figure figcaption{display:flex;align-items:center;gap:10px;padding:12px 16px;font-size:13px;color:var(--muted);
  background:rgba(255,255,255,.03);border-top:1px solid var(--line)}
.ev-figure figcaption .ico{width:8px;height:8px;border-radius:50%;background:var(--amber);flex:0 0 8px;
  box-shadow:0 0 10px var(--amber)}
.ev-body{margin-top:22px}
.ev-body h2{font-size:20px;font-weight:700;margin:32px 0 12px;display:flex;align-items:center;gap:10px}
.ev-body h2::before{content:"";width:5px;height:20px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--blue))}
.ev-body p{color:#c6d4f0;font-size:16.5px;margin-bottom:16px}
.ev-body p strong{color:var(--text)}
.ev-fact{margin:26px 0;padding:18px 22px;border-radius:var(--r-md);
  background:radial-gradient(circle at 8% 0%,rgba(255,207,63,.14),transparent 60%),rgba(255,207,63,.05);
  border:1px solid rgba(255,207,63,.32)}
.ev-fact .lab{font-family:"Orbitron",sans-serif;font-size:12px;letter-spacing:.14em;color:var(--amber);
  display:flex;align-items:center;gap:8px;margin-bottom:8px}
.ev-fact p{color:#ffe9a8;font-size:15px;margin:0}
.ev-fact.tip{background:radial-gradient(circle at 8% 0%,rgba(52,227,255,.14),transparent 60%),rgba(52,227,255,.05);
  border-color:rgba(52,227,255,.32)}
.ev-fact.tip .lab{color:var(--cyan)}
.ev-fact.tip p{color:#cdf3ff}
.ev-chips{display:flex;flex-wrap:wrap;gap:9px;margin:26px 0 0}
.ev-chips span{font-size:13px;color:var(--cyan);padding:6px 14px;border-radius:999px;
  background:rgba(52,227,255,.08);border:1px solid rgba(52,227,255,.28)}
.ev-pager{display:flex;justify-content:space-between;gap:14px;margin-top:56px;flex-wrap:wrap}
.ev-pager a{flex:1;min-width:200px;padding:16px 20px;border-radius:var(--r-md);background:var(--glass);
  border:1px solid var(--line);transition:.25s}
.ev-pager a:hover{border-color:rgba(52,227,255,.5);background:rgba(52,227,255,.07)}
.ev-pager .k{font-family:"Orbitron",sans-serif;font-size:11px;letter-spacing:.14em;color:var(--muted)}
.ev-pager .t{font-size:15.5px;font-weight:700;margin-top:4px}
.ev-pager .next{text-align:right}
.ev-pager .empty{flex:1;min-width:200px;padding:16px 20px;border-radius:var(--r-md);
  border:1px dashed var(--line);color:var(--muted);font-size:13px;display:flex;align-items:center;justify-content:center}

/* ============ 时间轴页 ============ */
.tl-hero{padding:66px 26px 6px;text-align:center;max-width:920px;margin:0 auto}
.tl-tag{display:inline-block;font-family:"Orbitron",sans-serif;font-size:12px;letter-spacing:.2em;
  color:var(--amber);border:1px solid rgba(255,207,63,.4);padding:6px 14px;border-radius:999px;background:rgba(255,207,63,.07)}
.tl-hero h1{font-size:clamp(30px,5.2vw,52px);font-weight:900;margin:18px 0 14px}
.tl-hero h1 .glow{background:linear-gradient(120deg,var(--cyan),var(--blue));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.tl-hero p{color:var(--muted);max-width:720px;margin:0 auto;font-size:16px}
.tl-legend{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin:24px 0 0}
.tl-legend span{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.tl-legend i{width:10px;height:10px;border-radius:50%;display:inline-block}
.tl-hint{text-align:center;color:var(--muted);font-size:13px;margin:18px 0 0}
.tl-hint b{color:var(--cyan)}

/* 时间轴：隐藏横向滚动条（保留拖动 / 滚轮 / 触控板滑动），避免原生细滚动条破坏画面 */
.tl-scroll{overflow-x:auto;overflow-y:hidden;padding:34px 0 26px;cursor:grab;
  scrollbar-width:none;-ms-overflow-style:none}
.tl-scroll.drag{cursor:grabbing}
.tl-scroll::-webkit-scrollbar{height:0;display:none}
.tl-track{position:relative;display:flex;align-items:flex-start;min-width:max-content;height:170px;padding:0 46px}
.tl-line{position:absolute;left:86px;right:86px;top:78px;height:2px;
  background:linear-gradient(90deg,transparent,rgba(52,227,255,.5) 12%,rgba(77,124,255,.55) 55%,rgba(255,207,63,.5) 88%,transparent)}
.tl-pulse{position:absolute;top:74px;height:10px;width:130px;border-radius:99px;pointer-events:none;
  background:radial-gradient(circle,rgba(52,227,255,.85),transparent 70%);filter:blur(3px);
  animation:tlrun 7s linear infinite}
@keyframes tlrun{0%{left:60px;opacity:0}10%{opacity:1}90%{opacity:1}100%{left:calc(100% - 190px);opacity:0}}
.tl-node{position:relative;width:88px;flex:0 0 88px;background:none;border:none;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;padding-top:70px;font-family:inherit;color:inherit}
.tl-dot{width:16px;height:16px;border-radius:50%;background:var(--bg-2);border:2px solid var(--cyan);
  box-shadow:0 0 0 0 rgba(52,227,255,.5);transition:.28s;position:relative;z-index:2}
.tl-node[data-era="0"] .tl-dot{border-color:var(--cyan)}
.tl-node[data-era="1"] .tl-dot{border-color:var(--blue)}
.tl-node[data-era="2"] .tl-dot{border-color:var(--amber)}
.tl-node[data-era="3"] .tl-dot{border-color:var(--violet)}
.tl-year{margin-top:12px;font-family:"Orbitron",sans-serif;font-size:13px;font-weight:700;color:var(--muted);transition:.25s;white-space:nowrap}
.tl-node:hover .tl-dot{transform:scale(1.35);box-shadow:0 0 16px rgba(52,227,255,.7)}
.tl-node:hover .tl-year{color:var(--text)}
.tl-node.active .tl-dot{transform:scale(1.5);box-shadow:0 0 0 6px rgba(52,227,255,.16),0 0 22px rgba(52,227,255,.8)}
.tl-node.active .tl-year{color:var(--cyan);font-size:15px}
.tl-node .tl-mini{position:absolute;top:6px;width:124px;font-size:11.5px;color:var(--text);
  background:rgba(10,18,48,.96);border:1px solid rgba(52,227,255,.3);border-radius:10px;padding:6px 8px;
  opacity:0;transform:translateY(-6px);pointer-events:none;transition:.25s;z-index:5;text-align:center;line-height:1.4;
  box-shadow:0 10px 24px rgba(0,0,0,.4)}
.tl-node:hover .tl-mini{opacity:1;transform:translateY(0)}

.tl-detail{max-width:940px;margin:14px auto 0;padding:0 26px}
.tl-detail-inner{position:relative;overflow:hidden;border-radius:var(--r-lg);min-height:236px;
  display:grid;grid-template-columns:minmax(0,.84fr) minmax(0,1.16fr);
  background:radial-gradient(circle at 12% -10%,rgba(52,227,255,.14),transparent 58%),var(--glass);
  border:1px solid var(--line)}
.tl-d-media{position:relative;overflow:hidden;min-height:236px;background:#0a1230}
.tl-d-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.tl-d-media::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,transparent 52%,rgba(10,18,48,.92))}
.tl-d-info{padding:28px 30px;display:flex;flex-direction:column;justify-content:center}
@media(max-width:720px){
  .tl-detail-inner{grid-template-columns:1fr}
  .tl-d-media{min-height:190px}
  .tl-d-media::after{background:linear-gradient(180deg,transparent 42%,rgba(10,18,48,.92))}
  .tl-d-info{padding:22px 22px 26px}
}
.tl-d-head{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap}
.tl-d-era{font-family:"Orbitron",sans-serif;font-size:12px;letter-spacing:.16em;color:var(--amber)}
.tl-d-year{font-family:"Orbitron",sans-serif;font-size:38px;font-weight:900;color:var(--cyan)}
.tl-d-title{font-size:23px;font-weight:800;margin:8px 0 12px}
.tl-d-brief{color:#c6d4f0;font-size:16px;max-width:700px}
.tl-d-go{display:inline-flex;align-items:center;gap:9px;margin-top:20px;padding:12px 24px;border-radius:999px;
  font-weight:700;color:#04122b;background:linear-gradient(135deg,var(--cyan),var(--blue));
  box-shadow:0 10px 26px rgba(52,227,255,.3);transition:.25s}
.tl-d-go:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(52,227,255,.5)}
.tl-d-go svg{width:17px;height:17px}
.tl-empty{grid-column:1/-1;color:var(--muted);display:flex;align-items:center;gap:12px;font-size:15px;min-height:236px;padding:30px 32px}
.tl-empty svg{width:26px;height:26px;flex:0 0 26px;opacity:.7}
/* 缓慢显现动画 */
.tl-anim{opacity:0}
.tl-detail-inner.play .tl-anim{animation:fadeUp .7s cubic-bezier(.22,.61,.36,1) both}
.tl-detail-inner.play .tl-d-media{animation-delay:.02s}
.tl-detail-inner.play .tl-d-info>.tl-anim:nth-child(1){animation-delay:.14s}
.tl-detail-inner.play .tl-d-info>.tl-anim:nth-child(2){animation-delay:.22s}
.tl-detail-inner.play .tl-d-info>.tl-anim:nth-child(3){animation-delay:.30s}
.tl-detail-inner.play .tl-d-info>.tl-anim:nth-child(4){animation-delay:.38s}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

footer.mod-foot{border-top:1px solid var(--line);margin-top:60px;padding:34px 0;text-align:center;color:var(--muted);font-size:13px}
@media(prefers-reduced-motion:reduce){.tl-pulse{display:none}.tl-detail-inner.play .tl-anim{animation:none;opacity:1}}
@media(max-width:600px){.ev-pager a{min-width:100%}}