/* ==========================================================================
   叠词练习（AABB / ABAB / ABAC）· 独立设计「练习册糖果纸」
   浅色 = 暖纸底 + 薄荷绿主色 + 蜜桃粉 / 葡萄紫辅色，手账式圆角
   深色 = 夜蓝纸 + 亮薄荷，跟随导航 #themeToggle 的 data-theme
   作用域统一 .rwd，不复用其它工具页样式
   ========================================================================== */

.rwd{
  --bg:#fbf6ea;
  --bg-soft:#f6efdf;
  --card:#fffdf8;
  --card2:#fdf7ec;
  --ink:#2c3345;
  --sub:#67718a;
  --faint:#98a0b3;
  --line:#ece2cf;
  --line2:#f4eddf;
  --line-strong:#dccfb4;
  --mint:#12a37c;
  --mint-2:#2bc39a;
  --mint-soft:#e2f7ef;
  --mint-ink:#0a7a5c;
  --peach:#ef7b5c;
  --peach-soft:#ffeee6;
  --peach-ink:#c4563a;
  --grape:#7a63d6;
  --grape-soft:#efeaff;
  --grape-ink:#5c47b3;
  --gold:#cfa03c;
  --gold-soft:#fbf2dc;
  --ok:#12855f;
  --bad:#cf4a3d;
  --shadow-sm:0 1px 2px rgba(64,52,30,.05),0 6px 16px rgba(64,52,30,.06);
  --shadow:0 2px 6px rgba(64,52,30,.07),0 18px 40px rgba(64,52,30,.09);
  --r:20px;
  --r-sm:12px;
  --num:"Bahnschrift","Segoe UI Variable Text",ui-monospace,SFMono-Regular,Menlo,monospace;
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15.5px;
  line-height:1.8;
  background:
    radial-gradient(760px 340px at 92% -8%,rgba(239,123,92,.14),transparent 62%),
    radial-gradient(680px 320px at 4% 4%,rgba(18,163,124,.13),transparent 58%),
    repeating-linear-gradient(0deg,transparent 0 27px,rgba(44,51,69,.035) 27px 28px),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
:root[data-theme="dark"] .rwd{
  --bg:#141922;
  --bg-soft:#1a2029;
  --card:#1c222c;
  --card2:#212833;
  --ink:#e7edf7;
  --sub:#a6b1c4;
  --faint:#7c879b;
  --line:#2c3442;
  --line2:#242b36;
  --line-strong:#3b4658;
  --mint:#3ddbaa;
  --mint-2:#6ce9c3;
  --mint-soft:rgba(61,219,170,.14);
  --mint-ink:#7ee9c6;
  --peach:#ff9a7c;
  --peach-soft:rgba(255,154,124,.14);
  --peach-ink:#ffb79f;
  --grape:#a795ff;
  --grape-soft:rgba(167,149,255,.15);
  --grape-ink:#c0b3ff;
  --gold:#e3bb63;
  --gold-soft:rgba(227,187,99,.14);
  --ok:#4fd7a6;
  --bad:#ff8f80;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4),0 6px 16px rgba(0,0,0,.26);
  --shadow:0 2px 6px rgba(0,0,0,.46),0 18px 40px rgba(0,0,0,.34);
  background:
    radial-gradient(760px 340px at 92% -8%,rgba(255,154,124,.10),transparent 62%),
    radial-gradient(680px 320px at 4% 4%,rgba(61,219,170,.10),transparent 58%),
    repeating-linear-gradient(0deg,transparent 0 27px,rgba(255,255,255,.022) 27px 28px),
    var(--bg);
}
.rwd *{box-sizing:border-box;}
.rwd p{margin:0;}
.rwd b,.rwd strong{font-weight:800;color:var(--ink);}
.rwd a{color:var(--mint-ink);}
.rwd-in{max-width:1360px;margin:0 auto;padding:0 30px;}
.rwd-body{padding-bottom:72px;}

/* ---------- 面包屑 ---------- */
.rwd-crumbbar{border-bottom:1px solid var(--line);background:rgba(255,253,248,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);}
:root[data-theme="dark"] .rwd-crumbbar{background:rgba(20,25,34,.86);}
.rwd-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin:0;padding:9px 0;font-size:12.5px;color:var(--faint);}
.rwd-crumb a{color:var(--sub);text-decoration:none;font-weight:600;}
.rwd-crumb a:hover{color:var(--mint);}
.rwd-crumb .sep{color:var(--line-strong);}
.rwd-crumb .cur{color:var(--ink);font-weight:800;}

/* ---------- 首屏 ---------- */
.rwd-hero{display:grid;grid-template-columns:minmax(300px,1.15fr) minmax(320px,.85fr);gap:26px;align-items:start;padding:26px 0 20px;}
.rwd-kicker{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;background:var(--card);border:1px solid var(--line-strong);box-shadow:var(--shadow-sm);font:800 11.5px/1 var(--num);letter-spacing:.14em;color:var(--mint-ink);text-transform:uppercase;}
.rwd-kicker i{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--mint),var(--peach));}
.rwd-hero h1{margin:13px 0 10px;font-size:clamp(26px,4.1vw,40px);line-height:1.22;font-weight:800;letter-spacing:-.015em;}
.rwd-hero h1 em{font-style:normal;color:var(--mint-ink);background:linear-gradient(180deg,transparent 62%,var(--mint-soft) 62%);padding:0 4px;}
.rwd-lead{font-size:15.5px;color:var(--sub);line-height:1.95;max-width:620px;}
.rwd-lead b{color:var(--mint-ink);}
.rwd-chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px;}
.rwd-chips span{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:6px 13px;font-size:12px;font-weight:700;color:var(--sub);}
.rwd-chips span:nth-child(3n+1){border-color:var(--mint);color:var(--mint-ink);background:var(--mint-soft);}
.rwd-chips span:nth-child(3n+2){border-color:var(--peach);color:var(--peach-ink);background:var(--peach-soft);}

/* 首屏即练卡 */
.rwd-try{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:18px 20px 16px;position:relative;overflow:hidden;}
.rwd-try::before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:linear-gradient(90deg,var(--mint),var(--peach),var(--grape));}
.rwd-try-h{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;font-weight:800;color:var(--sub);}
.rwd-try-h em{font-style:normal;font:800 11px/1 var(--num);letter-spacing:.12em;color:var(--grape-ink);background:var(--grape-soft);border-radius:999px;padding:5px 11px;}
.rwd-try-q{margin-top:11px;font-size:15px;line-height:1.85;color:var(--ink);font-weight:600;}
.rwd-try-q u{text-decoration:none;display:inline-block;min-width:78px;height:1.05em;vertical-align:-3px;border-bottom:2px dashed var(--mint);}
.rwd-try-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px;}
.rwd-try-opts button{border:1.5px solid var(--line-strong);background:var(--card2);color:var(--ink);border-radius:10px;padding:9px 10px;font:700 14px/1.4 inherit;cursor:pointer;transition:.14s;}
.rwd-try-opts button:hover{border-color:var(--mint);background:var(--mint-soft);color:var(--mint-ink);}
.rwd-try-opts button.ok{border-color:var(--ok);background:var(--mint-soft);color:var(--ok);}
.rwd-try-opts button.bad{border-color:var(--bad);background:var(--peach-soft);color:var(--bad);}
.rwd-try-opts button:disabled{cursor:default;}
.rwd-try-fb{margin-top:10px;font-size:13px;line-height:1.8;color:var(--sub);min-height:22px;}
.rwd-try-fb b{color:var(--mint-ink);}
.rwd-try-next{margin-top:8px;border:0;background:transparent;color:var(--faint);font:700 12.5px/1 inherit;cursor:pointer;padding:4px 0;text-decoration:underline;text-underline-offset:3px;}
.rwd-try-next:hover{color:var(--mint-ink);}

/* ---------- 工作区 ---------- */
.rwd-workspace{display:grid;grid-template-columns:302px minmax(0,1fr);gap:20px;margin-top:6px;align-items:start;}

/* 设置面板 */
.rwd-setup{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:18px 18px 20px;position:sticky;top:14px;}
.rwd-setup-h{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin-bottom:14px;}
.rwd-setup-h h2{margin:0;font-size:15px;font-weight:800;}
.rwd-setup-h small{font-size:11.5px;color:var(--faint);font-weight:600;}
.rwd-f{margin-bottom:15px;}
.rwd-f>label{display:block;font-size:12.5px;font-weight:800;color:var(--sub);margin-bottom:7px;letter-spacing:.02em;}
.rwd-f .hint{display:block;font-size:11.5px;font-weight:600;color:var(--faint);margin-top:5px;}
.rwd-seg{display:flex;flex-wrap:wrap;gap:6px;}
.rwd-seg button{border:1.5px solid var(--line-strong);background:var(--card2);color:var(--sub);border-radius:9px;padding:8px 12px;font:700 13px/1.35 inherit;cursor:pointer;transition:.14s;}
.rwd-seg button:hover{border-color:var(--mint);color:var(--mint-ink);}
.rwd-seg button.on{background:var(--mint);border-color:var(--mint);color:#fff;box-shadow:0 6px 14px rgba(18,163,124,.26);}
:root[data-theme="dark"] .rwd-seg button.on{color:#10202a;}
.rwd-seg.alt button.on{background:var(--grape);border-color:var(--grape);box-shadow:0 6px 14px rgba(122,99,214,.26);}
:root[data-theme="dark"] .rwd-seg.alt button.on{color:#151a22;}
.rwd-check{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--sub);cursor:pointer;}
.rwd-check input{width:16px;height:16px;accent-color:var(--mint);cursor:pointer;}
.rwd-run{width:100%;margin-top:4px;border:0;border-radius:11px;background:var(--mint);color:#fff;font:800 15px/1.5 inherit;padding:12px 0;cursor:pointer;box-shadow:0 10px 22px rgba(18,163,124,.28);transition:.15s;}
:root[data-theme="dark"] .rwd-run{color:#10202a;}
.rwd-run:hover{background:var(--mint-2);}
.rwd-run:disabled{opacity:.55;cursor:default;box-shadow:none;}
.rwd-sub-btns{display:flex;gap:7px;margin-top:8px;}
.rwd-sub-btns button{flex:1;border:1px solid var(--line-strong);background:var(--card2);color:var(--sub);border-radius:9px;padding:8px 0;font:700 12.5px/1.4 inherit;cursor:pointer;transition:.14s;}
.rwd-sub-btns button:hover{border-color:var(--peach);color:var(--peach-ink);}
.rwd-tipbox{margin-top:13px;padding:10px 12px;border-radius:var(--r-sm);background:var(--gold-soft);color:var(--sub);font-size:12px;line-height:1.75;border-left:3px solid var(--gold);}

/* 题目区 */
.rwd-drill{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:20px 22px 24px;min-height:320px;scroll-margin-top:78px;}
.rwd-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding-bottom:13px;border-bottom:1px dashed var(--line-strong);}
.rwd-bar .stat{display:flex;align-items:baseline;gap:5px;font-size:12.5px;color:var(--faint);font-weight:700;}
.rwd-bar .stat b{font:800 17px/1 var(--num);color:var(--ink);font-variant-numeric:tabular-nums;}
.rwd-bar .grow{flex:1;}
.rwd-bar button{border:1px solid var(--line-strong);background:var(--card2);color:var(--sub);border-radius:8px;padding:7px 13px;font:700 12.5px/1.3 inherit;cursor:pointer;transition:.14s;}
.rwd-bar button:hover{border-color:var(--mint);color:var(--mint-ink);}
.rwd-prog{height:7px;border-radius:99px;background:var(--line2);margin-top:12px;overflow:hidden;}
.rwd-prog i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--mint),var(--mint-2));transition:width .3s;}
.rwd-qs{margin-top:6px;}

.rwd-q{padding:16px 2px 15px;border-bottom:1px solid var(--line2);}
.rwd-q:last-child{border-bottom:0;}
.rwd-q-h{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:8px;}
.rwd-q-no{font:800 13px/1 var(--num);color:var(--faint);letter-spacing:.06em;}
.rwd-q-type{font-size:11.5px;font-weight:800;padding:3px 9px;border-radius:999px;background:var(--mint-soft);color:var(--mint-ink);}
.rwd-q-type.t2{background:var(--grape-soft);color:var(--grape-ink);}
.rwd-q-type.t3{background:var(--peach-soft);color:var(--peach-ink);}
.rwd-q-tag{font:800 10.5px/1 var(--num);letter-spacing:.1em;color:var(--faint);border:1px solid var(--line);border-radius:5px;padding:3px 6px;}
.rwd-q-stem{margin:0;font-size:15.5px;line-height:1.95;font-weight:600;}
.rwd-q-stem u{display:inline-block;min-width:82px;height:1.05em;vertical-align:-3px;text-decoration:none;border-bottom:2px dashed var(--mint);margin:0 4px;}
.rwd-q-stem .blank{display:inline-block;min-width:70px;border-bottom:2px solid var(--ink);}
.rwd-opts{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:11px;}
.rwd-opt{display:flex;align-items:center;gap:9px;text-align:left;border:1.5px solid var(--line-strong);background:var(--card2);color:var(--ink);border-radius:10px;padding:10px 12px;font:600 14.5px/1.6 inherit;cursor:pointer;transition:.14s;}
.rwd-opt:hover:not(:disabled){border-color:var(--mint);background:var(--mint-soft);}
.rwd-opt b{flex:0 0 22px;height:22px;border-radius:50%;background:var(--line2);color:var(--sub);font:800 12px/22px var(--num);text-align:center;}
.rwd-opt.ok{border-color:var(--ok);background:var(--mint-soft);color:var(--ok);font-weight:800;}
.rwd-opt.ok b{background:var(--ok);color:#fff;}
.rwd-opt.bad{border-color:var(--bad);background:var(--peach-soft);color:var(--bad);}
.rwd-opt.bad b{background:var(--bad);color:#fff;}
.rwd-opt:disabled{cursor:default;}
.rwd-inputrow{display:flex;gap:9px;margin-top:11px;flex-wrap:wrap;}
.rwd-inputrow input{flex:1;min-width:180px;border:1.5px solid var(--line-strong);border-radius:10px;background:var(--card2);color:var(--ink);font:700 15px/1.5 inherit;padding:10px 13px;outline:none;transition:.14s;letter-spacing:.08em;}
.rwd-inputrow input:focus{border-color:var(--mint);background:var(--card);box-shadow:0 0 0 3px var(--mint-soft);}
.rwd-inputrow button{border:1.5px solid var(--mint);background:var(--mint);color:#fff;border-radius:10px;padding:10px 18px;font:800 13.5px/1.4 inherit;cursor:pointer;}
:root[data-theme="dark"] .rwd-inputrow button{color:#10202a;}
.rwd-inputrow input:disabled{opacity:.75;}
.rwd-fb{margin-top:11px;border-radius:var(--r-sm);padding:11px 14px;font-size:13.5px;line-height:1.85;border-left:4px solid var(--line-strong);background:var(--card2);color:var(--sub);}
.rwd-fb.ok{border-left-color:var(--ok);background:var(--mint-soft);color:var(--mint-ink);}
.rwd-fb.bad{border-left-color:var(--bad);background:var(--peach-soft);color:var(--peach-ink);}
.rwd-fb b{color:inherit;}
.rwd-fb .fb-t{font-weight:800;font-size:13.5px;display:block;margin-bottom:2px;}
.rwd-fb .fb-line{display:block;}
.rwd-fb .fb-line em{font-style:normal;font-weight:800;color:var(--ink);}

.rwd-empty{padding:46px 16px;text-align:center;color:var(--faint);font-size:14px;line-height:2;}
.rwd-empty b{display:block;font-size:16px;color:var(--sub);margin-bottom:4px;}

/* ---------- 批量校验 ---------- */
.rwd-batch{margin-top:26px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:20px 22px 22px;scroll-margin-top:78px;}
.rwd-sec-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;margin-bottom:5px;}
.rwd-sec-h h2{margin:0;font-size:19px;font-weight:800;}
.rwd-sec-h span{font-size:12.5px;color:var(--faint);font-weight:600;}
.rwd-sec-p{font-size:13.5px;color:var(--sub);line-height:1.9;margin-bottom:12px;}
.rwd-batch textarea{width:100%;min-height:104px;resize:vertical;border:1.5px solid var(--line-strong);border-radius:var(--r-sm);background:var(--card2);color:var(--ink);font:600 14px/1.9 inherit;padding:11px 13px;outline:none;transition:.14s;}
.rwd-batch textarea:focus{border-color:var(--mint);background:var(--card);box-shadow:0 0 0 3px var(--mint-soft);}
.rwd-batch-tools{display:flex;flex-wrap:wrap;gap:8px;margin-top:9px;}
.rwd-btn{border:1px solid var(--line-strong);background:var(--card2);color:var(--sub);border-radius:999px;padding:8px 16px;font:700 13px/1.4 inherit;cursor:pointer;transition:.14s;}
.rwd-btn:hover{border-color:var(--mint);color:var(--mint-ink);}
.rwd-btn.pri{background:var(--grape);border-color:var(--grape);color:#fff;box-shadow:0 8px 16px rgba(122,99,214,.24);}
:root[data-theme="dark"] .rwd-btn.pri{color:#151a22;}
.rwd-btn.pri:hover{background:var(--grape-ink);border-color:var(--grape-ink);color:#fff;}
.rwd-bt-summary{display:flex;flex-wrap:wrap;gap:8px;margin:13px 0 0;font-size:12.5px;color:var(--sub);}
.rwd-bt-summary span{background:var(--mint-soft);color:var(--mint-ink);border-radius:999px;padding:5px 12px;font-weight:700;}
.rwd-bt-summary span.warn{background:var(--gold-soft);color:var(--gold);}
.rwd-bt-summary span.err{background:var(--peach-soft);color:var(--peach-ink);}
.rwd-tablewrap{margin-top:12px;overflow:auto;border:1px solid var(--line);border-radius:var(--r-sm);}
.rwd-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px;}
.rwd-table th,.rwd-table td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line2);vertical-align:top;}
.rwd-table th{background:var(--card2);font-size:12px;color:var(--faint);font-weight:800;letter-spacing:.04em;white-space:nowrap;}
.rwd-table tr:last-child td{border-bottom:0;}
.rwd-table td.w{font-weight:800;font-size:14.5px;letter-spacing:.06em;white-space:nowrap;}
.rwd-table td.t{white-space:nowrap;font:800 11.5px/1.9 var(--num);color:var(--mint-ink);}
.rwd-table td.t.other{color:var(--grape-ink);}
.rwd-table td.t.none{color:var(--bad);}
.rwd-table td.note{color:var(--sub);font-size:12.5px;line-height:1.7;}
.rwd-table .dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:6px;background:var(--mint);}
.rwd-table .dot.bad{background:var(--bad);}
.rwd-table .dot.warn{background:var(--gold);}

/* ---------- 速查表 ---------- */
.rwd-lib{margin-top:26px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:20px 22px 18px;}
.rwd-libtabs{display:flex;flex-wrap:wrap;gap:7px;margin:4px 0 12px;}
.rwd-libtabs button{border:1px solid var(--line-strong);background:var(--card2);color:var(--sub);border-radius:999px;padding:6px 14px;font:700 12.5px/1.4 inherit;cursor:pointer;}
.rwd-libtabs button.on{background:var(--ink);border-color:var(--ink);color:var(--card);}
:root[data-theme="dark"] .rwd-libtabs button.on{background:var(--mint);border-color:var(--mint);color:#10202a;}
.rwd-libbody{max-height:410px;overflow:auto;border:1px solid var(--line);border-radius:var(--r-sm);}

/* ---------- 口径说明表 ---------- */
.rwd-notecard{margin-top:28px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm);padding:20px 24px 8px;}
.rwd-notecard-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;margin-bottom:6px;}
.rwd-notecard-h h2{margin:0;font-size:17px;font-weight:800;letter-spacing:.01em;}
.rwd-notecard-h span{font-size:12.5px;color:var(--faint);font-weight:600;}
.rwd-notetable{width:100%;border-collapse:collapse;table-layout:fixed;}
.rwd-notetable th{width:116px;text-align:left;vertical-align:top;padding:12px 14px 12px 0;font-size:13.5px;font-weight:800;color:var(--ink);white-space:nowrap;}
.rwd-notetable td{vertical-align:top;padding:12px 0;font-size:13.5px;line-height:1.95;color:var(--sub);border-bottom:1px solid var(--line2);}
.rwd-notetable tr:last-child td{border-bottom:0;}
.rwd-notetable td b{color:var(--mint-ink);}

/* ---------- 信息页签 ---------- */
.rwd-tabs{display:flex;gap:26px;margin-top:28px;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none;}
.rwd-tabs::-webkit-scrollbar{display:none;}
.rwd-tab{position:relative;border:0;background:none;padding:11px 1px 12px;font:700 14.5px/1.4 inherit;color:var(--sub);cursor:pointer;white-space:nowrap;transition:.14s;}
.rwd-tab:hover{color:var(--ink);}
.rwd-tab::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2.5px;border-radius:2px;background:transparent;transition:.16s;}
.rwd-tab.on{color:var(--ink);}
.rwd-tab.on::after{background:var(--mint);}
.rwd-panel{display:none;background:var(--card);border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r);box-shadow:var(--shadow-sm);padding:24px 26px 26px;}
.rwd-panel.on{display:block;}
.rwd-panel>h2{margin:0 0 8px;font-size:16.5px;font-weight:800;letter-spacing:.01em;}
.rwd-panel>p{margin:0 0 20px;font-size:14.5px;line-height:2.05;color:var(--sub);}
.rwd-panel>p:last-child{margin-bottom:0;}
.rwd-panel>p b{color:var(--ink);background:linear-gradient(180deg,transparent 64%,var(--mint-soft) 64%);}
.rwd-steps{margin:0;padding-left:20px;color:var(--sub);font-size:14.5px;line-height:2.1;}
.rwd-steps li{margin-bottom:6px;}
.rwd-steps li b{color:var(--ink);}
.rwd-timeline{list-style:none;margin:0;padding:0;}
.rwd-timeline li{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line2);}
.rwd-timeline li:last-child{border-bottom:0;}
.rwd-timeline .ver{font:800 12px/1 var(--num);color:var(--mint-ink);background:var(--mint-soft);border-radius:999px;padding:4px 9px;}
.rwd-timeline .date{font:700 12px/1 var(--num);color:var(--faint);}
.rwd-timeline .txt{flex:1;min-width:220px;font-size:13.5px;line-height:1.9;color:var(--sub);}

/* ---------- FAQ ---------- */
.rwd-faq{margin-top:2px;}
.rwd-faq details{background:var(--card2);border:1px solid var(--line);border-radius:var(--r-sm);margin-bottom:8px;overflow:hidden;}
.rwd-faq summary{cursor:pointer;list-style:none;padding:12px 15px;font-size:14.5px;font-weight:800;display:flex;justify-content:space-between;align-items:center;gap:10px;}
.rwd-faq summary::-webkit-details-marker{display:none;}
.rwd-faq summary::after{content:"+";font:800 15px/1 var(--num);color:var(--faint);transition:.2s;}
.rwd-faq details[open] summary::after{transform:rotate(45deg);color:var(--mint);}
.rwd-faq .a{padding:0 15px 12px;font-size:13.5px;color:var(--sub);line-height:1.95;}

/* ---------- 相关工具 ---------- */
.rwd-rel{margin-top:28px;}
.rwd-rel h3{margin:0 0 12px;font-size:16px;font-weight:800;}
.rwd-rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.rwd-rel-item{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;text-decoration:none;color:var(--ink);transition:.15s;box-shadow:var(--shadow-sm);min-height:68px;}
.rwd-rel-item:hover{border-color:var(--mint);transform:translateY(-2px);box-shadow:var(--shadow);}
.rwd-rel-item .ri{flex:0 0 40px;height:40px;border-radius:10px;background:var(--mint-soft);color:var(--mint-ink);display:flex;align-items:center;justify-content:center;font-size:20px;line-height:1;}
.rwd-rel-item:nth-child(2) .ri{background:var(--grape-soft);color:var(--grape-ink);}
.rwd-rel-item:nth-child(3) .ri{background:var(--peach-soft);color:var(--peach-ink);}
.rwd-rel-item:nth-child(4) .ri{background:var(--gold-soft);color:var(--gold);}
.rwd-rel-item b{display:block;font-size:13.5px;font-weight:800;line-height:1.5;}
.rwd-rel-item small{display:block;font-size:11.5px;color:var(--faint);font-weight:600;line-height:1.5;}
.rwd-foot{margin-top:18px;font-size:12px;color:var(--faint);line-height:1.9;text-align:center;}

.rwd-toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,18px);background:var(--ink);color:var(--bg);padding:10px 20px;border-radius:999px;font-size:13px;font-weight:700;opacity:0;pointer-events:none;transition:.24s;z-index:9998;box-shadow:var(--shadow);}
.rwd-toast.show{opacity:1;transform:translate(-50%,0);}

/* ---------- 打印 ---------- */
.rwd-sheet{display:none;}
.rwd-sheet h1{font-size:20px;margin:0 0 4px;}
.rwd-sheet .meta{font-size:12px;color:#555;margin-bottom:14px;}
.rwd-sheet .item{margin:0 0 12px;page-break-inside:avoid;}
.rwd-sheet .item .q{font-size:13.5px;line-height:1.9;}
.rwd-sheet .item .ans{font-size:12.5px;color:#444;margin-top:3px;}
.rwd-sheet .line{border-bottom:1px solid #bbb;display:inline-block;min-width:90px;}

@media (max-width:1080px){
  .rwd-hero{grid-template-columns:1fr;}
  .rwd-workspace{grid-template-columns:1fr;}
  .rwd-setup{position:static;}
  .rwd-rel-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:720px){
  .rwd-in{padding:0 15px;}
  .rwd-rel-grid{grid-template-columns:1fr;}
  .rwd-panel{padding:18px 15px 20px;}
  .rwd-tabs{gap:20px;}
  .rwd-notecard{padding:16px 15px 6px;}
  .rwd-notetable th{width:86px;padding-right:10px;font-size:12.5px;}
  .rwd-opts,.rwd-try-opts{grid-template-columns:1fr;}
  .rwd-drill{padding:16px 14px 18px;}
  .rwd-bar .stat b{font-size:15px;}
  .rwd-hero h1{font-size:25px;}
}

@media print{
  body{background:#fff !important;}
  .rwd{display:none !important;}
  .nav-header,.footer,.site-footer,.back-to-top,.site-btt,#clicaptcha-container,
  #evadeFab,.evade-fab,#navEvadeBtn,.nav-evade-btn,#navMask,.nav-mask,
  .ma-page-modal,.ma-toast-wrap,.gh-modal,.rwd-toast{display:none !important;}
  .rwd-sheet{display:block !important;color:#111;font-family:"Songti SC","SimSun",serif;}
  body.rwd-print-ans .rwd-sheet--paper{display:none !important;}
  body.rwd-print-paper .rwd-sheet--ans{display:none !important;}
  @page{size:A4;margin:14mm;}
}