:root{
  --bg:#0A0E1A; --bg2:#101830;
  --panel:rgba(255,255,255,.055); --panel2:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.12); --line2:rgba(255,255,255,.2);
  --ink:#E9EDF6; --ink2:#9AA7C2; --ink3:#6B7896;
  --cn:#F0B45F; --cn-deep:#E07A4F; --cn-bg:rgba(240,180,95,.12);
  --wd:#5FD4E0; --wd-deep:#6FA8FF; --wd-bg:rgba(95,212,224,.12);
  --gold:#E8C266; --ok:#4FC38A; --bad:#E06C6C;
  --axisW:40px;
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent}
/* 去掉移动端双击缩放 300ms 延迟，避免「点了没反应」的手感 */
button,.ev,.erachip,.pchip,.opt,.scrub-track{touch-action:manipulation}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px; line-height:1.55;
  padding-bottom:96px;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 18%, rgba(255,255,255,.5) 50%, transparent 52%),
    radial-gradient(1px 1px at 78% 8%, rgba(255,255,255,.35) 50%, transparent 52%),
    radial-gradient(1.5px 1.5px at 55% 32%, rgba(255,255,255,.28) 50%, transparent 52%),
    radial-gradient(1px 1px at 30% 55%, rgba(255,255,255,.3) 50%, transparent 52%),
    radial-gradient(1.5px 1.5px at 88% 62%, rgba(255,255,255,.22) 50%, transparent 52%),
    radial-gradient(1px 1px at 8% 78%, rgba(255,255,255,.3) 50%, transparent 52%),
    radial-gradient(1.5px 1.5px at 65% 88%, rgba(255,255,255,.25) 50%, transparent 52%),
    radial-gradient(1px 1px at 42% 95%, rgba(255,255,255,.2) 50%, transparent 52%);
  background-attachment:fixed;
}
main{max-width:880px;margin:0 auto;padding:0 12px}

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;background:rgba(10,14,26,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
  padding:10px 12px 8px;
}
.title-row{display:flex;align-items:baseline;gap:10px;max-width:880px;margin:0 auto}
.title-row h1{
  font-size:21px;margin:0;letter-spacing:2px;font-weight:800;
  background:linear-gradient(90deg,var(--gold),var(--wd));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.title-row .sub{font-size:13px;color:var(--ink2)}
.tool-row{display:flex;gap:8px;max-width:880px;margin:8px auto 0}
.search{flex:1;position:relative}
.search input{
  width:100%;border:1px solid var(--line);border-radius:999px;background:var(--panel);
  padding:9px 32px 9px 15px;font-size:15px;color:var(--ink);outline:none;
}
.search input::placeholder{color:var(--ink3)}
.search input:focus{border-color:var(--wd)}
.search .qclear{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  border:0;background:none;color:var(--ink2);font-size:16px;padding:4px 8px;cursor:pointer;display:none;
}
.tool{
  border:1px solid var(--line);background:var(--panel);color:var(--ink);
  border-radius:999px;padding:9px 14px;font-size:14px;cursor:pointer;white-space:nowrap;
}
.tool.on{background:linear-gradient(90deg,var(--gold),var(--cn-deep));border-color:transparent;color:#1A1208;font-weight:700}
.erachips{display:flex;gap:6px;overflow-x:auto;max-width:880px;margin:8px auto 0;padding-bottom:2px;scrollbar-width:none}
.erachips::-webkit-scrollbar{display:none}
.erachip{
  border:1px solid var(--line);background:var(--panel);border-radius:999px;
  padding:6px 12px;font-size:13.5px;cursor:pointer;white-space:nowrap;color:var(--ink2);
}
.erachip.on{background:var(--panel2);color:var(--gold);border-color:var(--gold)}

/* ---------- 时代分段与中轴 ---------- */
.era{position:relative;padding-bottom:10px}
.era::before{
  content:'';position:absolute;left:50%;margin-left:-1px;top:0;bottom:-8px;width:2px;z-index:0;
  background:linear-gradient(180deg,rgba(95,212,224,.08),rgba(95,212,224,.55) 8%,rgba(240,180,95,.55) 92%,rgba(240,180,95,.08));
  box-shadow:0 0 10px rgba(95,212,224,.25);
}
.era-head{position:relative;z-index:2;display:flex;justify-content:center;padding:16px 0 12px}
.era-pill{
  background:linear-gradient(135deg,#16213E,#1E2C52);border:1px solid rgba(95,212,224,.5);
  border-radius:999px;padding:6px 16px;text-align:center;white-space:nowrap;
  box-shadow:0 0 22px rgba(95,212,224,.22), inset 0 0 12px rgba(95,212,224,.08);
}
.era-pill .en{font-size:16px;font-weight:800;letter-spacing:1px;color:#F2F6FF}
.era-pill .es{font-size:12px;color:var(--wd);margin-left:6px}
.era-pill .ec{font-size:11.5px;color:var(--ink3);margin-left:6px}
.era-grid{display:grid;grid-template-columns:1fr var(--axisW) 1fr;position:relative;z-index:1}
.lane{min-width:0}
.lane.wd{padding-right:6px}
.lane.cn{padding-left:6px}

/* ---------- 事件卡 ---------- */
.ev{
  position:relative;background:var(--panel);border:1px solid var(--line);
  border-radius:9px;padding:7px 9px;margin-bottom:8px;cursor:pointer;
  transition:transform .12s, background .12s;
}
.ev:active{transform:scale(.97)}
.ev:hover{background:var(--panel2)}
.ev.wd{margin-right:4px;border-top:1px solid rgba(95,212,224,.35)}
.ev.cn{margin-left:4px;border-top:1px solid rgba(240,180,95,.35)}
.ev.wd::before,.ev.cn::before{
  content:'';position:absolute;top:15px;width:7px;height:7px;border-radius:50%;
}
.ev.wd::before{right:-17px;background:var(--wd);box-shadow:0 0 8px var(--wd)}
.ev.cn::before{left:-17px;background:var(--cn);box-shadow:0 0 8px var(--cn)}
.ev.wd::after,.ev.cn::after{
  content:'';position:absolute;top:18.5px;width:17px;height:1px;
}
.ev.wd::after{right:-17px;background:linear-gradient(90deg,transparent,var(--wd))}
.ev.cn::after{left:-17px;background:linear-gradient(270deg,transparent,var(--cn))}
.ev .yr{font-size:12px;font-weight:800;letter-spacing:.3px}
.ev.wd .yr{color:var(--wd)}
.ev.cn .yr{color:var(--cn)}
.ev .tt{font-size:14.5px;font-weight:700;margin:1px 0 3px;line-height:1.4;color:var(--ink)}
.ev .ds{
  font-size:12.5px;color:var(--ink2);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ev .tags{display:flex;gap:4px;margin-top:4px;flex-wrap:wrap}
.tag{font-size:11px;border-radius:4px;padding:1px 6px;background:rgba(255,255,255,.08);color:var(--ink2)}
.tag.pair{background:rgba(232,194,102,.16);color:var(--gold);font-weight:700}
.tag.key{background:rgba(79,195,138,.14);color:var(--ok)}
.ev.dim{opacity:.25}
.empty{padding:24px;text-align:center;color:var(--ink2);font-size:13px}

/* ---------- 底部抽屉 ---------- */
.mask{position:fixed;inset:0;background:rgba(4,6,12,.6);z-index:90;opacity:0;pointer-events:none;transition:opacity .2s}
.mask.on{opacity:1;pointer-events:auto}
.sheet{
  position:fixed;left:0;right:0;bottom:0;z-index:95;
  background:linear-gradient(180deg,#141C33,#0D1322);
  border-radius:18px 18px 0 0;border-top:1px solid var(--line2);box-shadow:0 -8px 40px rgba(0,0,0,.5);
  transform:translateY(105%);transition:transform .25s ease;
  max-height:82vh;overflow-y:auto;padding:6px 16px calc(16px + env(safe-area-inset-bottom));
}
.sheet.on{transform:translateY(0)}
.sheet .grab{width:38px;height:4px;border-radius:2px;background:var(--line2);margin:6px auto 10px}
.sheet h3{font-size:19px;margin:0 0 6px}
.sheet .meta{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.sheet .sec{margin:10px 0}
.sheet .sec b{font-size:12.5px;color:var(--ink3);display:block;margin-bottom:3px;letter-spacing:1px}
.sheet .sec p{margin:0;font-size:15.5px;line-height:1.7}
.sheet .sec.exam{background:rgba(232,194,102,.1);border:1px dashed rgba(232,194,102,.5);border-radius:8px;padding:8px 10px}
.sheet .sec.exam b{color:var(--gold)}
.sheet .pairchips{display:flex;flex-wrap:wrap;gap:6px}
.pchip{
  border:1px solid var(--line);background:var(--panel);border-radius:999px;
  padding:6px 11px;font-size:13px;cursor:pointer;color:var(--ink);
}
.pchip.wd{border-color:rgba(95,212,224,.5);color:var(--wd)}
.pchip.cn{border-color:rgba(240,180,95,.5);color:var(--cn)}
.sheet .close{
  position:sticky;top:0;float:right;border:0;background:var(--panel2);
  width:28px;height:28px;border-radius:50%;font-size:15px;color:var(--ink2);cursor:pointer;
}

/* ---------- 底部拖动导航 ---------- */
.scrubber{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  background:rgba(10,14,26,.94);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  display:flex;align-items:center;gap:10px;
}
.scrub-track{flex:1;height:26px;position:relative;display:flex;align-items:center;cursor:pointer;touch-action:none}
.scrub-rail{position:absolute;left:0;right:0;height:6px;border-radius:3px;background:rgba(255,255,255,.1)}
.scrub-fill{position:absolute;left:0;height:6px;border-radius:3px;background:linear-gradient(90deg,var(--wd),var(--gold));opacity:.7}
.scrub-thumb{
  position:absolute;width:14px;height:22px;border-radius:7px;background:var(--ink);
  transform:translateX(-50%);box-shadow:0 1px 6px rgba(0,0,0,.6);
}
.scrub-label{font-size:13px;color:var(--ink2);white-space:nowrap;min-width:96px;text-align:right}

/* ---------- 考点小测 ---------- */
.quiz{
  position:fixed;inset:0;z-index:100;background:rgba(4,6,12,.72);
  display:none;align-items:center;justify-content:center;padding:18px;
}
.quiz.on{display:flex}
.quiz-box{
  background:linear-gradient(180deg,#141C33,#0D1322);border:1px solid var(--line2);
  border-radius:16px;max-width:440px;width:100%;padding:18px;box-shadow:0 12px 48px rgba(0,0,0,.6);
  max-height:88vh;overflow-y:auto;
}
.quiz-box .qhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.quiz-box h3{margin:0;font-size:16px;color:var(--gold);letter-spacing:1px}
.quiz-box .qtype{font-size:11px;border:1px solid var(--line);border-radius:4px;padding:2px 7px;color:var(--ink2)}
.quiz-box .qstat{font-size:12.5px;color:var(--ink2);margin-bottom:12px}
.quiz-box .qstat b{color:var(--gold)}
.quiz-box .q{font-size:17px;font-weight:700;margin-bottom:6px;line-height:1.5}
.quiz-box .qhint{font-size:13.5px;color:var(--ink2);margin-bottom:14px;line-height:1.55}
.opt{
  display:block;width:100%;text-align:left;border:1px solid var(--line);background:var(--panel);
  border-radius:9px;padding:11px 13px;font-size:15.5px;margin-bottom:8px;cursor:pointer;color:var(--ink);
  transition:border-color .12s;
}
.opt:hover{border-color:var(--line2)}
.opt .ono{color:var(--ink3);margin-right:8px;font-weight:700}
.opt.right{border-color:var(--ok);background:rgba(79,195,138,.14);color:var(--ok);font-weight:700}
.opt.wrong{border-color:var(--bad);background:rgba(224,108,108,.14);color:var(--bad)}
.opt:disabled{cursor:default;opacity:.9}
.opt .ord{display:inline-block;width:20px;height:20px;line-height:20px;text-align:center;border-radius:50%;
  background:var(--panel2);color:var(--ink2);font-size:12px;margin-right:8px;font-weight:700}
.opt .ord.filled{background:var(--gold);color:#1A1208}
.quiz-foot{display:flex;justify-content:space-between;align-items:center;margin-top:12px;gap:8px}
.btn{border:0;border-radius:9px;padding:10px 17px;font-size:15px;cursor:pointer;background:linear-gradient(90deg,var(--gold),var(--cn-deep));color:#1A1208;font-weight:700}
.btn.ghost{background:var(--panel);color:var(--ink);border:1px solid var(--line);font-weight:400}
.btn:disabled{opacity:.4;cursor:default}
.qnote{margin-top:10px;font-size:13.5px;line-height:1.65;color:var(--ink2);
  background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:9px 11px}
.qnote b{color:var(--gold)}

/* ---------- 页脚 ---------- */
footer{
  max-width:880px;margin:26px auto 8px;padding:12px;color:var(--ink3);
  font-size:12.5px;line-height:1.7;border-top:1px dashed var(--line);
}
@media (min-width:560px){
  .era-grid{gap:0}
  body{font-size:16.5px}
  .ev .tt{font-size:15.5px}
  .ev .ds{font-size:13px}
}