:root{
  --bg:#f5f6f8; --card:#fff; --line:#e4e7eb; --line2:#eef0f3;
  --ink:#1f2937; --ink2:#4b5563; --ink3:#909aa6;
  --brand:#2a4764; --brand2:#3b5f85;
  --k:#b45309; --k-bg:#fff7ed; --k-l:#fed7aa;
  --l:#1d4ed8; --l-bg:#eff6ff; --l-l:#bfdbfe;
  --s:#15803d; --s-bg:#f0fdf4; --s-l:#bbf7d0;
  --warn:#b91c1c; --warn-bg:#fef2f2; --warn-l:#fecaca;
  --ok:#15803d; --ok-bg:#f0fdf4;
  --r:12px;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);font-size:14px;line-height:1.6;
  padding-bottom:96px;-webkit-font-smoothing:antialiased;
}
button{font-family:inherit;font-size:13px;cursor:pointer;border:1px solid var(--line);
  background:#fff;color:var(--ink2);border-radius:8px;padding:7px 13px;transition:.15s}
button:hover{border-color:var(--brand2);color:var(--brand)}
button.primary{background:var(--brand);border-color:var(--brand);color:#fff}
button.primary:hover{background:var(--brand2);color:#fff}
input{font-family:inherit;font-size:13px;padding:8px 10px;border:1px solid var(--line);
  border-radius:8px;width:100%;background:#fff;color:var(--ink)}
input:focus{outline:none;border-color:var(--brand2)}

/* ---------- hero ---------- */
.hero{background:linear-gradient(160deg,#24405c,#33536f);color:#fff;padding:18px 16px 16px;
  border-radius:0 0 20px 20px;box-shadow:0 2px 12px rgba(36,64,92,.14)}
.hero-top{display:flex;align-items:center;gap:14px}
.cd{display:flex;align-items:baseline;gap:3px}
.cd-num{font-size:40px;font-weight:800;line-height:1;letter-spacing:-1px}
.cd-unit{font-size:13px;opacity:.85}
.cd-meta{flex:1}
.cd-title{font-size:13px;opacity:.9}
.cd-date{font-size:11px;opacity:.6;margin-top:2px}
.cd-badge{font-size:10px;border:1px solid rgba(255,255,255,.35);border-radius:20px;
  padding:3px 9px;opacity:.9;white-space:nowrap}
.quote{margin-top:14px;font-size:13px;line-height:1.7;background:rgba(255,255,255,.12);
  border-radius:10px;padding:10px 12px;border-left:3px solid rgba(255,255,255,.5)}
.reminders{margin-top:12px}
.rm-head{font-size:12px;opacity:.85;display:flex;align-items:center;justify-content:space-between}
.rm-add{cursor:pointer;font-size:15px;padding:0 6px;opacity:.9}
.rm-list,.rm-list ul{list-style:none}
#rm-list li{display:flex;align-items:center;gap:8px;font-size:13px;padding:3px 0;
  border-top:1px solid rgba(255,255,255,.12);margin-top:3px}
#rm-list li span{flex:1}
#rm-list li.done span{text-decoration:line-through;opacity:.55}
.rm-del{opacity:.6;cursor:pointer;padding:0 4px}

/* ---------- 学科入口 ---------- */
.subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;padding:14px 12px 4px}
.sub-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:12px 6px;text-align:center;position:relative;overflow:hidden;cursor:pointer}
.sub-card .sc-name{font-size:15px;font-weight:700}
.sub-card .sc-n{font-size:11px;color:var(--ink3);margin-top:2px}
.sub-card .bar{position:absolute;left:0;top:0;bottom:0;width:3px}
.sub-card.on{border-color:var(--brand);box-shadow:0 0 0 2px rgba(42,71,100,.12)}
.sub-card.dim{opacity:.5}

/* ---------- tabs ---------- */
.tabs{display:flex;gap:6px;padding:12px 12px 0;position:sticky;top:0;background:var(--bg);z-index:5}
.tab{border-radius:20px;padding:6px 14px;font-size:13px;color:var(--ink2)}
.tab.on{background:var(--brand);border-color:var(--brand);color:#fff}
.pane{display:none;padding:12px}
.pane.on{display:block}

/* ---------- 列表卡片 ---------- */
.item{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:13px 14px;margin-bottom:10px}
.item.focus{border-color:var(--warn-l);background:var(--warn-bg)}
.item.done{opacity:.7}
.ihead{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.i-no{font-weight:700;font-size:13px}
.i-subj{font-size:11px;color:var(--ink3)}
.badge{font-size:11px;padding:2px 8px;border-radius:20px;font-weight:600;line-height:1.7;border:1px solid transparent}
.b-k{background:var(--k-bg);color:var(--k);border-color:var(--k-l)}
.b-l{background:var(--l-bg);color:var(--l);border-color:var(--l-l)}
.b-s{background:var(--s-bg);color:var(--s);border-color:var(--s-l)}
.b-warn{background:var(--warn-bg);color:var(--warn);border-color:var(--warn-l)}
.b-ok{background:var(--ok-bg);color:var(--ok);border-color:var(--s-l)}
.b-gray{background:#f3f4f6;color:var(--ink3);border-color:var(--line)}
.i-img{width:100%;border-radius:8px;margin:9px 0;border:1px solid var(--line);display:block}
.turn{background:#fafbfc;border-left:3px solid var(--brand2);padding:8px 11px;
  border-radius:0 6px 6px 0;font-size:13px;color:var(--ink2);margin:8px 0}
.turn b{display:block;font-size:11px;color:var(--brand);margin-bottom:2px}
.sec-t{font-size:11px;color:var(--brand);font-weight:700;margin-top:9px}
.sec-c{font-size:13px;color:var(--ink2);white-space:pre-line}
.ans{color:var(--brand);font-weight:600}
.iacts{display:flex;align-items:center;gap:6px;margin-top:11px;flex-wrap:wrap}
.mk{width:36px;height:32px;padding:0;font-size:15px;font-weight:700;display:flex;
  align-items:center;justify-content:center}
.mk.ok.on{background:var(--ok-bg);border-color:var(--s-l);color:var(--ok)}
.mk.bad.on{background:var(--warn-bg);border-color:var(--warn-l);color:var(--warn)}
.imeta{margin-left:auto;font-size:11px;color:var(--ink3);text-align:right;line-height:1.5}
.empty{text-align:center;color:var(--ink3);padding:40px 0;font-size:13px}
.filters{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.chip{border-radius:20px;padding:5px 12px;font-size:12px;background:#fff;
  border:1px solid var(--line);color:var(--ink2);cursor:pointer}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.an{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--ink3);margin-top:8px}
.spin{width:13px;height:13px;border:2px solid var(--line);border-top-color:var(--brand);
  border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.err{color:var(--warn);font-size:12px;margin-top:8px}

/* ---------- 周报 ---------- */
.rp-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:14px;margin-bottom:10px}
.rp-card h3{font-size:14px;color:var(--brand);margin-bottom:10px}
.rp-row{display:flex;align-items:center;gap:10px;margin-bottom:8px;font-size:13px}
.rp-row .nm{width:78px;color:var(--ink2);flex-shrink:0}
.rp-bar{flex:1;height:9px;background:var(--line2);border-radius:6px;overflow:hidden}
.rp-bar i{display:block;height:100%;border-radius:6px}
.rp-row .vl{width:52px;text-align:right;color:var(--ink3);font-size:12px;font-variant-numeric:tabular-nums}
.rp-adv{font-size:13px;color:var(--ink2);background:#fafbfc;border-radius:8px;padding:10px 12px;line-height:1.75}
.kv{display:flex;gap:14px;flex-wrap:wrap}
.kv div{font-size:12px;color:var(--ink3)}
.kv b{display:block;font-size:20px;color:var(--brand);font-weight:700}
.wp{display:flex;justify-content:space-between;font-size:13px;padding:6px 0;
  border-bottom:1px dashed var(--line)}
.wp .w{color:var(--warn);font-size:11px}

/* ---------- 相册 ---------- */
.gal-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(104px,1fr));gap:8px}
.gal-cell{position:relative;border-radius:9px;overflow:hidden;border:1px solid var(--line);
  background:#fff}
/* aspect-ratio 需 Chrome88+，老内核/360兼容模式塌陷，改用 padding-bottom 占位法全兼容 */
.gal-cell::before{content:"";display:block;padding-bottom:100%}
.gal-cell img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;display:block}
.gal-tag{position:absolute;left:4px;bottom:4px;font-size:10px;background:rgba(0,0,0,.55);
  color:#fff;border-radius:20px;padding:1px 7px}

/* ---------- FAB ---------- */
.fab{position:fixed;right:18px;bottom:22px;width:56px;height:56px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:28px;line-height:1;border:none;
  box-shadow:0 6px 18px rgba(42,71,100,.35);z-index:20;display:flex;align-items:center;justify-content:center}
.fab:hover{background:var(--brand2);color:#fff}

/* ---------- 弹层 ---------- */
.sheet{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(17,24,39,.5);display:none;z-index:40;
  align-items:flex-end;justify-content:center}
.sheet.on{display:flex}
.sheet-box{background:#fff;width:100%;max-width:560px;border-radius:16px 16px 0 0;
  max-height:92vh;display:flex;flex-direction:column;animation:up .22s ease}
@keyframes up{from{transform:translateY(30px);opacity:.6}}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;
  border-bottom:1px solid var(--line);font-weight:700;font-size:15px;color:var(--brand)}
.sheet-head .x{border:none;background:none;font-size:22px;color:var(--ink3);padding:0 4px}
.sheet-body{padding:14px 16px 22px;overflow:auto}
.step{display:none}
.step.on{display:block}
.step-tip{font-size:12px;color:var(--ink3);margin-bottom:12px}
.sub-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.sub-pick{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 6px;
  text-align:center;font-weight:700;cursor:pointer;position:relative;overflow:hidden}
.sub-pick .bar{position:absolute;left:0;top:0;bottom:0;width:3px}
.sub-pick.on{border-color:var(--brand);box-shadow:0 0 0 2px rgba(42,71,100,.12)}
.src-btns{display:flex;gap:10px;margin-bottom:12px}
.src-btn{flex:1;padding:16px 8px;font-size:14px}
.note-row{margin-top:4px}
.crop-wrap{width:100%;height:min(58vh,460px);background:#111;border-radius:10px;
  overflow:hidden;position:relative;touch-action:none}
#crop-canvas{width:100%;height:100%;display:block;touch-action:none}
.crop-tools{display:flex;gap:8px;margin-top:12px}
.crop-tools button{flex:0 0 auto}
.crop-tools .primary{flex:1}
.progress{text-align:center;padding:24px 0}
.spinner{width:34px;height:34px;border:3px solid var(--line);border-top-color:var(--brand);
  border-radius:50%;animation:sp .8s linear infinite;margin:0 auto 14px}
.prog-text{font-size:14px;font-weight:600}
.prog-sub{font-size:12px;color:var(--ink3);margin-top:4px}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:88px;transform:translateX(-50%) translateY(10px);
  background:var(--brand);color:#fff;padding:9px 18px;border-radius:22px;font-size:13px;
  opacity:0;pointer-events:none;transition:.25s;z-index:60;max-width:80vw;text-align:center}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:400px){
  .cd-num{font-size:34px}
  .subjects{gap:7px}
}

/* ---------------- 登录层 ---------------- */
/* 关键修复：JS 登录成功后用 hidden 属性隐藏登录层，但 .login 的 display:flex 会覆盖 hidden 的默认样式，
   导致登录成功后登录层永远盖在界面上（表现为"进不去"）。此规则确保 hidden 时真正隐藏。 */
.login[hidden]{display:none}
.login{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg,#f4f6fa);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}
.login-box{background:#fff;border:1px solid var(--line,#e5e9f2);border-radius:16px;padding:26px 22px;width:100%;max-width:360px;box-shadow:0 10px 40px rgba(20,40,90,.10)}
.login-brand{font-size:22px;font-weight:700;color:var(--ink,#1c2434);text-align:center}
.login-sub{font-size:12px;color:var(--ink3,#8b95a8);text-align:center;margin:6px 0 16px}
.stu-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.stu-card{border:1.5px solid var(--line,#e5e9f2);border-radius:12px;padding:12px 10px;text-align:center;cursor:pointer;transition:.15s}
.stu-card b{display:block;font-size:15px;color:var(--ink,#1c2434)}
.stu-card span{display:block;font-size:11px;color:var(--ink3,#8b95a8);margin-top:4px}
.stu-card.on{border-color:#2f5cff;background:#f0f4ff}
.pwd-row{display:flex;gap:8px}
.pwd-row input{flex:1;border:1px solid var(--line,#e5e9f2);border-radius:10px;padding:10px 12px;font-size:14px;outline:none}
.pwd-row input:focus{border-color:#2f5cff}
.pwd-row .primary{background:#2f5cff;color:#fff;border:none;border-radius:10px;padding:0 18px;font-size:14px;cursor:pointer}
.login-err{color:#e5484d;font-size:12px;text-align:center;margin-top:10px;min-height:16px}

/* ---------- 退出按钮 + 顶栏自适应（2026-10-01） ---------- */
.logout-btn{font-size:10px;border:1px solid rgba(255,255,255,.4);background:transparent;color:#fff;border-radius:20px;padding:3px 10px;cursor:pointer;opacity:.9;white-space:nowrap}
.logout-btn:hover{background:rgba(255,255,255,.15);opacity:1}
.cd-meta{min-width:0}
.cd-title,.cd-date{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}