/* ── 段落讲义：段旁按键 + 五台阶浮层 ──
 * 按键做题中不显示：判分后 drill 给 #qCard 加 .rh-on 才现身（复盘/回看都会判分，天然全开）。
 * 浮层挂 data-amn-fit → notes-widget 的几何让位规则自动接管，不抬 z-index 抢笔记面板。
 * house style：无 emoji（内联 SVG）、无阴影、品牌紫。 */
.rh-chip{display:none;vertical-align:2px;margin-right:7px;border:1px solid #ddcbf5;background:#fff;color:#6b1fb8;
  border-radius:99px;padding:2px 10px;font-size:11.5px;font-weight:700;cursor:pointer;font-family:inherit;
  align-items:center;gap:4px;line-height:1.5;white-space:nowrap}
.rh-chip svg{width:11px;height:11px;flex:none}
.rh-chip:hover{background:#f6f0ff}
#qCard.rh-on .rh-chip{display:inline-flex}

.rh-mask{position:fixed;inset:0;z-index:320;background:rgba(26,10,46,.45);display:none;
  align-items:center;justify-content:center;padding:16px}
.rh-mask.on{display:flex}
.rh-panel{background:#fff;border:1px solid #ece3fa;border-radius:16px;width:min(880px,100%);
  /* 定高不随内容伸缩（同名著站 ah4 的课上投屏教训）：逐句学一步长一步短，
     跟内容伸缩会让「下一步」按钮位置跳来跳去；正文区内部滚动、底部导航钉死。 */
  height:min(90vh,880px);display:flex;flex-direction:column;overflow:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#1a1a1a}
.rh-head{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid #ece3fa;flex-wrap:wrap}
.rh-ht{font-size:15px;font-weight:800}
.rh-hs{font-size:11.5px;color:#9ca3af}
.rh-ls{display:flex;gap:4px;margin-left:auto}
.rh-ls button{border:1px solid #e5e7eb;background:#fff;color:#6b7280;border-radius:7px;min-width:26px;height:26px;
  padding:0 6px;font-size:12px;font-weight:800;cursor:pointer;font-family:inherit}
.rh-ls button:hover{border-color:#c9a9ee;color:#6b1fb8}
.rh-ls button.on{background:#6b1fb8;border-color:#6b1fb8;color:#fff}
.rh-x{border:0;background:transparent;color:#9ca3af;cursor:pointer;padding:4px;display:flex}
.rh-x:hover{color:#1a1a1a}
.rh-x svg{width:16px;height:16px}
.rh-tabs{display:flex;gap:6px;padding:10px 16px;border-bottom:1px solid #ece3fa;overflow-x:auto;flex:none}
.rh-tab{border:1px solid #e5e7eb;background:#fff;color:#6b7280;border-radius:99px;padding:5px 13px;
  font-size:12.5px;font-weight:700;cursor:pointer;font-family:inherit;white-space:nowrap;display:inline-flex;gap:6px;align-items:center}
.rh-tab i{font-style:normal;font-size:10.5px;font-weight:800;color:#c4b5dd}
.rh-tab:hover{border-color:#c9a9ee;color:#6b1fb8}
.rh-tab.on{background:#f6f0ff;border-color:#6b1fb8;color:#4a1380}
.rh-tab.on i{color:#a855f7}
.rh-body{overflow:auto;flex:1 1 auto;padding:14px 18px 22px;font-size:14px;line-height:1.8}

.rh-h4{font-size:12.5px;font-weight:800;color:#8a7aa8;letter-spacing:.05em;margin:16px 0 8px}
.rh-h4:first-child{margin-top:2px}
.rh-gist{font-size:16px;font-weight:700;line-height:1.7}
.rh-ident{display:inline-block;background:#f6f0ff;color:#4a1380;border:1px solid #ddcbf5;border-radius:99px;
  padding:3px 12px;font-size:12.5px;font-weight:700;margin-top:8px}
.rh-path{display:flex;align-items:center;flex-wrap:wrap;gap:6px;margin-top:4px}
.rh-path .st{background:#fbfaff;border:1px solid #ece3fa;border-radius:9px;padding:4px 11px;font-size:12.5px;font-weight:600}
.rh-path .ar{color:#c4b5dd;font-weight:800}
.rh-ovline{font-size:13px;color:#6b7280;line-height:1.9}
.rh-ovline .cur{color:#4a1380;font-weight:700;background:#f6f0ff;border-radius:6px;padding:1px 6px}
.rh-ovline .pl2{display:inline-block;min-width:18px;text-align:center;font-weight:800;font-size:11px;color:#6b1fb8;
  background:#ece3fa;border-radius:5px;padding:0 4px;margin-right:6px}
.rh-note{font-size:12px;color:#9ca3af;margin-top:14px;line-height:1.7}

.rh-sent{border:1px solid #ece3fa;border-radius:12px;padding:10px 13px;margin:8px 0}
.rh-sent .en{font-size:14.5px;line-height:1.75}
.rh-sent .en .sn{display:inline-block;min-width:20px;font-size:11px;font-weight:800;color:#9ca3af;font-variant-numeric:tabular-nums}
.rh-bds{display:flex;gap:5px;flex-wrap:wrap;margin-top:7px}
.rh-bd{display:inline-block;border-radius:6px;padding:1.5px 8px;font-size:11px;font-weight:700}
.rh-bd.role{background:#ece3fa;color:#4a1380}
.rh-bd.role2{background:#fbfaff;color:#8a7aa8;border:1px solid #ece3fa}
.rh-bd.fn{background:#f0fdf4;color:#15803d;border:1px solid #bbe7cd}
.rh-bd.q{background:#fffbeb;color:#92400e;border:1px solid #f6dfa7}
.rh-sent .why{font-size:12.5px;color:#6b7280;margin-top:7px;line-height:1.7}
.rh-sent .why b{color:#8a7aa8;font-weight:700}
.rh-sent .zh{font-size:13px;color:#6b7280;margin-top:4px;line-height:1.7;border-top:1px dashed #ece3fa;padding-top:6px}

.rh-sw{display:flex;gap:8px;align-items:baseline;border:1px solid #ece3fa;border-radius:10px;padding:8px 12px;margin:7px 0;flex-wrap:wrap}
.rh-sw .w{font-size:13.5px;font-weight:800;color:#6b1fb8}
.rh-sw .use{font-size:12.5px;color:#6b7280;flex:1;min-width:180px;line-height:1.7}
.rh-iwg{margin:8px 0 12px}
.rh-iwg .gn{font-size:13px;font-weight:700;margin-bottom:5px}
.rh-iwg .gn i{font-style:normal;font-size:11.5px;color:#9ca3af;font-weight:600;margin-left:7px}
.rh-ws{display:flex;gap:6px;flex-wrap:wrap}
.rh-ws .iw{background:#fbfaff;border:1px solid #ece3fa;border-radius:8px;padding:2.5px 10px;font-size:12.5px;font-weight:600}
.rh-g2s{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin:7px 0}
.rh-g2s .b{background:#f6f0ff;border:1px solid #ddcbf5;color:#4a1380;border-radius:8px;padding:3px 11px;font-size:12.5px;font-weight:700}
.rh-g2s .ar{color:#c4b5dd;font-weight:800}
.rh-g2s .sp{background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:3px 10px;font-size:12.5px}

.rh-base{border:1px solid #ece3fa;border-radius:12px;padding:12px 14px;margin:9px 0}
.rh-base .lb{font-size:11px;font-weight:800;color:#8a7aa8;letter-spacing:.04em;margin:9px 0 3px}
.rh-base .lb:first-child{margin-top:0}
.rh-base .orig{font-size:13.5px;line-height:1.75;background:#fafafa;border-left:3px solid #d9cdee;border-radius:0 9px 9px 0;padding:7px 11px}
.rh-base .simple{font-size:14.5px;font-weight:700;color:#14532d;background:#f0fdf4;border:1px solid #bbe7cd;border-radius:9px;padding:7px 11px;display:inline-block}
.rh-base .fnb{margin-left:8px}
.rh-base ol{margin:2px 0 0 20px}
.rh-base ol li{font-size:13.5px;line-height:1.9}
.rh-base .mig li{color:#3b3448}

.rh-rev{border:1px solid #e5e7eb;background:#fff;color:#6b1fb8;border-radius:99px;padding:5px 14px;
  font-size:12px;font-weight:700;cursor:pointer;font-family:inherit;margin-top:6px}
.rh-rev:hover{background:#f6f0ff}
.rh-hid{display:none;margin-top:7px}
.rh-hid.on{display:block}
.rh-r1{border:1px solid #ece3fa;border-radius:12px;padding:10px 13px;margin:8px 0}
.rh-hints{display:flex;gap:6px;flex-wrap:wrap}
.rh-hints .hk{background:#fbfaff;border:1px solid #ece3fa;border-radius:8px;padding:3px 10px;font-size:12.5px;font-weight:600}
.rh-r1 .en2{font-size:14px;line-height:1.75}
.rh-free{background:#fbfaff;border:1px solid #ece3fa;border-radius:12px;padding:11px 14px;font-size:13.5px;line-height:1.8}
.rh-stephint{font-size:12px;color:#9ca3af;line-height:1.7;margin-bottom:8px}
/* ── 逐句学模式 ── */
.rh-mode{display:inline-flex;border:1px solid #e5e7eb;border-radius:99px;overflow:hidden;margin-left:6px}
.rh-mode button{border:0;background:#fff;color:#6b7280;padding:5px 13px;font-size:12px;font-weight:700;cursor:pointer;font-family:inherit}
.rh-mode button.on{background:#6b1fb8;color:#fff}
.rh-mode button:not(.on):hover{color:#6b1fb8}
.rh-scard{border:1px solid #ece3fa;border-radius:14px;padding:14px 16px}
.rh-scard .en{font-size:15.5px;line-height:1.8}
.rh-scard .en .sn{display:inline-block;min-width:24px;font-size:11px;font-weight:800;color:#9ca3af;font-variant-numeric:tabular-nums}
.rh-scard .zh{font-size:13px;color:#6b7280;line-height:1.75;margin-top:6px}
.rh-lb{font-size:11px;font-weight:800;color:#8a7aa8;letter-spacing:.05em;margin:13px 0 6px;border-top:1px dashed #ece3fa;padding-top:10px}
.rh-cks{display:flex;flex-wrap:wrap;gap:5px;margin-top:9px}
.rh-ck{display:inline-flex;flex-direction:column;border:1px solid #ece3fa;background:#fbfaff;border-radius:8px;padding:3px 9px}
.rh-ck .ce{font-size:12.5px;font-weight:600}
.rh-ck .cz{font-size:11px;color:#9ca3af}
.rh-scard .rh-sc-cover{display:none}
.rh-scard.cover .rh-sc-learn{display:none}
.rh-scard.cover .rh-sc-cover{display:block}
.rh-foot{display:flex;align-items:center;gap:10px;padding:10px 16px;border-top:1px solid #ece3fa;flex:none;background:#fff}
.rh-nv{border:1px solid #e5e7eb;background:#fff;color:#6b7280;border-radius:99px;padding:7px 16px;font-size:12.5px;font-weight:700;cursor:pointer;font-family:inherit}
.rh-nv:hover:not(:disabled){color:#6b1fb8;border-color:#c9a9ee}
.rh-nv:disabled{opacity:.4;cursor:default}
.rh-nv.nx{background:#6b1fb8;border-color:#6b1fb8;color:#fff;margin-left:auto}
.rh-nv.nx:hover{filter:brightness(1.08);color:#fff}
.rh-dots{display:flex;gap:5px;align-items:center;flex-wrap:wrap;justify-content:center;flex:1;min-width:0}
.rh-dots button{width:9px;height:9px;border-radius:99px;border:0;background:#ece3fa;cursor:pointer;padding:0}
.rh-dots button:hover{background:#c9a9ee}
.rh-dots button.on{background:#6b1fb8;width:22px}
@media(max-width:640px){
  .rh-mask{padding:8px}
  .rh-body{padding:12px 13px 18px}
  .rh-ls{margin-left:0;flex-basis:100%;order:9}
  .rh-mode{margin-left:auto}
  .rh-dots{display:none}
}

/* ── 口语版补充：三档升级表 + 加分短语加粗 + 题卡四问 ── */
.rh-ladder{border:1px solid #ece3fa;border-radius:12px;padding:11px 14px;margin:9px 0}
.rh-ladder .fn0{font-size:13px;font-weight:800;color:#4a1380;margin-bottom:7px}
.rh-ladder .row{display:flex;gap:9px;align-items:baseline;margin:5px 0}
.rh-ladder .bd{flex:none;min-width:34px;text-align:center;font-size:11px;font-weight:800;border-radius:6px;padding:2px 7px}
.rh-ladder .bd.b55{background:#f0fdf4;color:#15803d;border:1px solid #bbe7cd}
.rh-ladder .bd.b65{background:#fffbeb;color:#b45309;border:1px solid #f6dfa7}
.rh-ladder .bd.b75{background:#f6f0ff;color:#6b1fb8;border:1px solid #ddcbf5}
.rh-ladder .tx{font-size:13.5px;line-height:1.7}
.rh-ladder .nt{font-size:12px;color:#9ca3af;margin-top:5px;line-height:1.7}
.rh-scard .en .hlw,.rh-sent .en .hlw{background:#f3ebff;border-radius:4px;padding:0 3px;font-weight:700;color:#4a1380}
.rh-cue{border:1px solid #ece3fa;border-radius:12px;padding:11px 14px;margin:8px 0;display:flex;gap:10px;align-items:baseline}
.rh-cue .qn{flex:none;font-size:11px;font-weight:800;color:#fff;background:#6b1fb8;border-radius:6px;padding:2px 8px}
.rh-cue .qt{font-size:13.5px;line-height:1.7}
.rh-cue .pid{font-size:12.5px;color:#6b7280;margin-left:auto;text-align:right;line-height:1.6}
.rh-mig{border:1px solid #ece3fa;border-radius:12px;padding:10px 13px;margin:8px 0}
.rh-mig .tp{font-size:13px;font-weight:800;color:#4a1380}
.rh-mig .op{font-size:13.5px;line-height:1.75;margin-top:4px}
/* 口语页无判分闸：按键常显（覆盖上面阅读版的 display:none 默认） */
.rh-chip{display:inline-flex}