:root{
  --brand:#123a8a;
  --brand-2:#2563eb;
  --brand-soft:#e8eefc;
  --ink:#131722;
  --ink-2:#3d4657;
  --ink-3:#6b7488;
  --line:#e3e7ef;
  --bg:#f4f6fa;
  --card:#ffffff;
  --ok:#0f9d63;
  --ok-soft:#e6f7f0;
  --bad:#d64545;
  --bad-soft:#fdeceb;
  --warn:#b26a00;
  --warn-soft:#fff5e2;
  --radius:16px;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px -12px rgba(16,24,40,.18);
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-t:env(safe-area-inset-top,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  overscroll-behavior-y:none;
}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
.app{min-height:100dvh;display:flex;flex-direction:column}
.boot{padding:48px 20px;text-align:center;color:var(--ink-3)}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:20;
  padding:calc(10px + var(--safe-t)) 14px 10px;
  background:linear-gradient(180deg,#123a8a,#1a4bb0);
  color:#fff;display:flex;align-items:center;gap:10px;
  box-shadow:0 2px 14px -6px rgba(18,58,138,.6);
}
.topbar .tb-title{font-size:17px;font-weight:650;letter-spacing:.2px;flex:1;min-width:0;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar .tb-sub{font-size:12px;opacity:.8;font-weight:400;display:block;margin-top:1px}
.iconbtn{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,255,255,.14);flex:none;font-size:18px;line-height:1}
.iconbtn:active{background:rgba(255,255,255,.26)}
.topbar .spacer{width:38px;flex:none}

/* ---------- layout ---------- */
.wrap{padding:14px 14px calc(96px + var(--safe-b));max-width:760px;margin:0 auto;width:100%}
.section-title{font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.08em;
  margin:22px 2px 10px;text-transform:uppercase}
.section-title:first-child{margin-top:4px}

/* ---------- hero ---------- */
.hero{background:var(--card);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);
  border:1px solid var(--line)}
.hero h1{margin:0 0 6px;font-size:21px;line-height:1.35;letter-spacing:-.2px}
.hero p{margin:0;color:var(--ink-2);font-size:14px}
.stats{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.stat{flex:1;min-width:88px;background:var(--brand-soft);border-radius:12px;padding:10px 12px}
.stat b{display:block;font-size:19px;color:var(--brand);line-height:1.3}
.stat span{font-size:11.5px;color:var(--ink-3)}

/* ---------- group card ---------- */
.group{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  border:1px solid var(--line);overflow:hidden;margin-bottom:12px}
.group-head{padding:14px 16px 10px;display:flex;align-items:baseline;gap:8px}
.group-head h2{margin:0;font-size:16px;font-weight:700;flex:1;line-height:1.4}
.group-head .cnt{font-size:12px;color:var(--ink-3);flex:none;background:var(--bg);
  padding:3px 9px;border-radius:99px;border:1px solid var(--line)}
.group-desc{margin:0 16px 10px;font-size:13px;color:var(--ink-3);line-height:1.6}
.plist{display:flex;flex-direction:column}
.pitem{display:flex;align-items:center;gap:12px;padding:13px 16px;text-align:left;width:100%;
  border-top:1px solid var(--line);min-height:64px}
.pitem:active{background:#f7f9fd}
.pitem .yr{flex:none;width:46px;text-align:center;font-weight:700;font-size:13px;color:var(--brand);
  background:var(--brand-soft);border-radius:9px;padding:6px 0;line-height:1.25}
.pitem .yr small{display:block;font-size:9.5px;font-weight:600;color:var(--ink-3)}
.pitem .meta{flex:1;min-width:0}
.pitem .meta .t{font-size:14.5px;font-weight:600;line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pitem .meta .s{font-size:12px;color:var(--ink-3);margin-top:3px;display:flex;gap:8px;flex-wrap:wrap}
.pitem .go{flex:none;color:#b8c0d0;font-size:20px;line-height:1}
.badge{display:inline-block;font-size:10.5px;font-weight:700;padding:1.5px 7px;border-radius:99px;
  background:var(--brand-soft);color:var(--brand);vertical-align:1px}
.badge.hot{background:#ffe9e6;color:#c0392b}
.badge.done{background:var(--ok-soft);color:var(--ok)}
.pbar{height:4px;border-radius:99px;background:var(--line);overflow:hidden;margin-top:6px}
.pbar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand-2),var(--ok));border-radius:99px}

/* ---------- practice ---------- */
.qhead{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.qhead .chip{font-size:12px;font-weight:700;color:var(--brand);background:var(--brand-soft);
  padding:4px 10px;border-radius:99px}
.qhead .chip.gray{background:#eef1f6;color:var(--ink-3)}
.qhead .flex1{flex:1}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  border:1px solid var(--line);padding:16px;margin-bottom:12px}
.stem{font-size:16.5px;line-height:1.85;white-space:pre-wrap;word-break:break-word}
.stem b{font-weight:700}
.opts{display:flex;flex-direction:column;gap:9px;margin-top:16px}
.opt{display:flex;gap:11px;align-items:flex-start;width:100%;text-align:left;
  padding:13px 14px;border:1.5px solid var(--line);border-radius:13px;background:#fff;
  font-size:15.5px;line-height:1.7;transition:.14s}
.opt .k{flex:none;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:#eef1f6;color:var(--ink-2);font-size:13px;font-weight:700;margin-top:1px}
.opt .v{flex:1;min-width:0;word-break:break-word;white-space:pre-wrap}
.opt:active{transform:scale(.985)}
.opt.sel{border-color:var(--brand-2);background:#f3f7ff}
.opt.sel .k{background:var(--brand-2);color:#fff}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.right .k{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt.wrong .k{background:var(--bad);color:#fff}
.opt[disabled]{opacity:1}

.verdict{margin-top:14px;border-radius:13px;padding:12px 14px;font-size:14.5px;font-weight:650;
  display:flex;gap:9px;align-items:center;line-height:1.5}
.verdict.ok{background:var(--ok-soft);color:#0a7a4c}
.verdict.no{background:var(--bad-soft);color:#b03333}
.verdict .big{font-size:20px;line-height:1}

.explain{margin-top:12px;background:#f7f9fd;border:1px solid var(--line);border-radius:13px;
  padding:14px;font-size:14.5px;line-height:1.8;color:var(--ink-2);white-space:pre-wrap;word-break:break-word}
.explain .eh{font-size:12.5px;font-weight:800;color:var(--brand);letter-spacing:.06em;margin-bottom:7px}
.ansline{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:8px}
.ansline em{font-style:normal;color:var(--ok)}

.matlink{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:650;
  color:var(--brand);background:var(--brand-soft);border-radius:99px;padding:7px 13px;margin-bottom:12px}
.mat{font-size:15.5px;line-height:1.9;white-space:pre-wrap;word-break:break-word;color:var(--ink-2)}
.mat h4{margin:0 0 8px;font-size:14px;color:var(--brand);font-weight:750}
.imgwarn{margin-top:12px;background:var(--warn-soft);border:1px solid #f2dcb0;color:var(--warn);
  border-radius:11px;padding:11px 13px;font-size:13.5px;line-height:1.65}

/* ---------- bottom nav ---------- */
.navbar{position:fixed;left:0;right:0;bottom:0;z-index:30;
  padding:6px 8px calc(6px + var(--safe-b));
  background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(14px);
  border-top:1px solid var(--line);display:flex}
.navbar button{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:7px 2px 5px;color:var(--ink-3);font-size:10.5px;font-weight:600;border-radius:11px}
.navbar button .ic{font-size:20px;line-height:1}
.navbar button.on{color:var(--brand);background:var(--brand-soft)}

.actionbar{position:fixed;left:0;right:0;bottom:0;z-index:30;
  padding:10px 14px calc(10px + var(--safe-b));
  background:rgba(255,255,255,.96);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);display:flex;gap:10px;align-items:center;
  max-width:760px;margin:0 auto}
.btn{flex:1;padding:13px 16px;border-radius:13px;font-size:15.5px;font-weight:700;text-align:center;
  background:var(--brand);color:#fff;box-shadow:0 6px 16px -8px rgba(18,58,138,.8)}
.btn:active{transform:scale(.985)}
.btn.ghost{background:#eef1f6;color:var(--ink-2);box-shadow:none}
.btn.ok{background:var(--ok);box-shadow:0 6px 16px -8px rgba(15,157,99,.8)}
.btn:disabled{opacity:.45}
.btn.sm{flex:none;padding:9px 14px;font-size:14px;border-radius:11px}
.prog{flex:none;font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;font-weight:650}

/* ---------- misc ---------- */
.empty{text-align:center;padding:56px 20px;color:var(--ink-3)}
.empty .big{font-size:44px;line-height:1;margin-bottom:14px}
.empty p{margin:6px 0;font-size:14.5px}
.note{background:var(--warn-soft);border:1px solid #f2dcb0;border-radius:13px;padding:13px 15px;
  font-size:13px;line-height:1.7;color:#8a5a00;margin-bottom:12px}
.note b{color:#6d4700}
.footnote{padding:18px 4px 8px;font-size:12px;color:var(--ink-3);line-height:1.75;text-align:center}
.toast{position:fixed;left:50%;bottom:calc(88px + var(--safe-b));transform:translate(-50%,14px);
  background:rgba(19,23,34,.92);color:#fff;padding:10px 18px;border-radius:99px;font-size:14px;
  opacity:0;pointer-events:none;transition:.22s;z-index:60;max-width:80vw;text-align:center}
.toast.on{opacity:1;transform:translate(-50%,0)}
.reslist{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.resrow{display:flex;align-items:center;gap:10px;padding:11px 13px;border-radius:12px;
  background:var(--card);border:1px solid var(--line);font-size:14px;text-align:left;width:100%}
.resrow .n{flex:none;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:12.5px;font-weight:700;background:#eef1f6;color:var(--ink-2)}
.resrow.ok .n{background:var(--ok-soft);color:var(--ok)}
.resrow.no .n{background:var(--bad-soft);color:var(--bad)}
.resrow .t{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--ink-2)}
.resrow .a{flex:none;font-size:12px;font-weight:700;color:var(--ink-3)}
.bigscore{text-align:center;padding:22px 16px}
.bigscore .pct{font-size:52px;font-weight:800;line-height:1;letter-spacing:-2px}
.bigscore .lbl{font-size:14px;color:var(--ink-3);margin-top:10px}
.segmented{display:flex;background:#eef1f6;border-radius:12px;padding:3px;gap:3px;margin-bottom:14px}
.segmented button{flex:1;padding:9px 8px;border-radius:9px;font-size:14px;font-weight:650;color:var(--ink-3)}
.segmented button.on{background:#fff;color:var(--brand);box-shadow:0 1px 3px rgba(16,24,40,.12)}

/* ---------- 申论作答区 ---------- */
.draftbox{margin-top:16px;border:1.5px solid var(--line);border-radius:13px;overflow:hidden;background:#fbfcfe}
.drafthead{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 13px;background:#f2f5fb;border-bottom:1px solid var(--line)}
.drafthead .dl{font-size:13px;font-weight:750;color:var(--brand);letter-spacing:.04em}
.wcount{font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;font-weight:650}
.wcount.over{color:var(--bad);font-weight:750}
textarea.draft{display:block;width:100%;border:0;outline:none;resize:vertical;
  padding:13px 14px;font:16px/1.85 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:transparent;min-height:150px}
textarea.draft::placeholder{color:#a8b0c0}
.explain.mine{background:#eef4ff;border-color:#d3e0fb}
.explain.mine .eh{color:var(--brand-2)}

.verdict .redo{flex:none;font-size:13px;font-weight:700;padding:6px 12px;border-radius:9px;
  background:rgba(255,255,255,.75);color:inherit;border:1px solid rgba(0,0,0,.07)}
.verdict .redo:active{transform:scale(.96)}

/* ---------- 筛选条 ---------- */
.fchips{display:flex;gap:7px;margin-bottom:12px;overflow-x:auto;padding-bottom:2px}
.fchip{flex:none;padding:7px 13px;border-radius:99px;font-size:13px;font-weight:650;
  background:#fff;border:1px solid var(--line);color:var(--ink-2);white-space:nowrap}
.fchip.on{background:var(--brand);border-color:var(--brand);color:#fff;
  box-shadow:0 4px 12px -6px rgba(18,58,138,.8)}

/* ---------- 收藏星标 ---------- */
.fav{flex:none;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:17px;line-height:1;color:#c2c9d6;background:#f2f5fb}
.fav.on{color:#e8a900;background:#fff7e0}

/* ---------- 模考计时条 ---------- */
.mockbar{display:flex;align-items:center;gap:10px;margin-bottom:12px;
  background:linear-gradient(135deg,#1b2b52,#123a8a);color:#fff;
  border-radius:13px;padding:12px 15px;box-shadow:0 8px 20px -12px rgba(18,58,138,.9)}
.mockbar .mlbl{font-size:12.5px;opacity:.85;flex:none}
.mockbar .mtime{font-size:22px;font-weight:800;letter-spacing:.5px;
  font-variant-numeric:tabular-nums;flex:1;text-align:center}
.mockbar .mhint{font-size:12px;opacity:.85;flex:none}
.verdict.mock{background:#eef2fa;color:var(--ink-2)}

/* ---------- 搜索 ---------- */
.searchbox{display:flex;gap:8px;align-items:center}
.sinput{flex:1;min-width:0;padding:12px 15px;border-radius:13px;border:1.5px solid var(--line);
  background:#fff;font:15px/1.5 inherit;color:var(--ink);outline:none;
  -webkit-appearance:none;appearance:none}
.sinput:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.sinput::placeholder{color:#a8b0c0}

/* ---------- 字号档位 ---------- */
html[data-font="0"]{--fs-scale:.92}
html[data-font="1"]{--fs-scale:1}
html[data-font="2"]{--fs-scale:1.12}
html[data-font] .stem{font-size:calc(16.5px * var(--fs-scale))}
html[data-font] .opt{font-size:calc(15.5px * var(--fs-scale))}
html[data-font] .mat{font-size:calc(15.5px * var(--fs-scale))}
html[data-font] .explain{font-size:calc(14.5px * var(--fs-scale))}
html[data-font] textarea.draft{font-size:calc(16px * var(--fs-scale))}