/* ============================================================
   刷刷英文 — 樣式
   設計基準:參考 Engoo Daily News / VoiceTube 等真實教學網站
   白底、深灰內文、單一藍主色、螢光筆黃標記、淺色提示盒
   ============================================================ */

:root {
  --ink: #404040;
  --ink-light: #767f88;
  --primary: #0b72c4;
  --primary-dark: #095d9f;
  --primary-tint: #e9f4fc;
  --highlight: #ffedad;        /* 螢光筆黃:已完成單字 */
  --highlight-deep: #f7d764;
  --hint-orange: #e8890c;
  --tint-green: #eef7dc;
  --tint-orange: #fff0e1;
  --ok: #3a8a4d;
  --ok-tint: #e8f4ea;
  --bad: #c94040;
  --bad-tint: #fbecec;
  --line: #e3e8ed;
  --bg-soft: #f5f7f9;
  --radius: 8px;
  --font: -apple-system, "Segoe UI", Roboto, "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  color: var(--ink);
  background: #fff;
  line-height: 1.75;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: var(--font); cursor: pointer; }

/* ---------------- 頂欄 ---------------- */
.topbar {
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
  height: 58px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .5px;
  border-radius: 5px;
  padding: 3px 7px;
}
.topnav { display: flex; gap: 4px; margin-left: auto; }
.topnav a {
  color: var(--ink);
  font-size: 15px;
  padding: 6px 14px;
  border-radius: 6px;
  white-space: nowrap;
}
.topnav a:hover { background: var(--bg-soft); text-decoration: none; }
.topnav a.active { color: var(--primary); font-weight: 700; background: var(--primary-tint); }

/* ---------------- 版面容器 ---------------- */
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 810px; margin: 0 auto; padding: 0 20px; }

/* ---------------- 首頁 ---------------- */
.hero {
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}
.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 52px 20px 56px;
}
.hero h1 { font-size: 32px; line-height: 1.35; letter-spacing: .5px; }
.hero .sub { color: var(--ink-light); margin-top: 10px; font-size: 17px; max-width: 620px; }
.hero .stats { display: flex; gap: 28px; margin-top: 26px; flex-wrap: wrap; }
.hero .stat b { font-size: 24px; color: var(--primary); font-weight: 700; }
.hero .stat span { display: block; font-size: 13px; color: var(--ink-light); }

.module-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin: 34px 0 14px;
}
.module-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 22px;
  background: #fff;
  display: block;
  color: var(--ink);
  transition: box-shadow .15s, border-color .15s;
}
.module-card:hover {
  text-decoration: none;
  border-color: var(--primary);
  box-shadow: 0 3px 14px rgba(11, 114, 196, .1);
}
.module-card .tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-tint);
  border-radius: 4px;
  padding: 2px 8px;
  letter-spacing: 1px;
}
.module-card h2 { font-size: 21px; margin: 10px 0 6px; }
.module-card p { color: var(--ink-light); font-size: 14.5px; }
.module-card .go { margin-top: 14px; color: var(--primary); font-weight: 700; font-size: 14.5px; }

.howto {
  margin: 40px 0 56px;
}
.howto h2 { font-size: 20px; margin-bottom: 4px; }
.howto .lead { color: var(--ink-light); font-size: 14.5px; margin-bottom: 18px; }
.howto-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.howto-step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: #fff;
  font-size: 14.5px;
}
.howto-step .n {
  display: inline-flex;
  width: 26px; height: 26px;
  align-items: center; justify-content: center;
  background: var(--ink);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
}
.howto-step b { display: block; margin-bottom: 3px; }
.howto-step span { color: var(--ink-light); }
.howto-step .demo {
  margin-top: 10px;
  padding: 9px 12px;
  background: var(--bg-soft);
  border-radius: 6px;
  font-size: 14px;
}

/* ---------------- 練習/章節標頭(Engoo 式) ---------------- */
.exercise-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 38px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--ink);
}
.exercise-head .ex-no {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  white-space: nowrap;
}
.exercise-head h2 { font-size: 19px; }
.exercise-head .en { color: var(--ink-light); font-size: 13.5px; font-weight: 400; }

/* ---------------- 徽章 ---------------- */
.badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  border-radius: 4px;
  padding: 1px 8px;
  vertical-align: middle;
}
.badge.level-basic { background: var(--tint-green); color: #4c7a1e; }
.badge.level-mid { background: var(--primary-tint); color: var(--primary-dark); }
.badge.level-adv { background: var(--tint-orange); color: #b05e0a; }
.badge.level-high { background: var(--bad-tint); color: var(--bad); }
.badge.cat { background: var(--bg-soft); color: var(--ink-light); font-weight: 400; }

/* ---------------- 文章列表 ---------------- */
.page-head { margin: 34px 0 6px; }
.page-head h1 { font-size: 26px; }
.page-head p { color: var(--ink-light); font-size: 15px; margin-top: 4px; }

.article-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 24px 0 60px; }
.article-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  transition: box-shadow .15s, border-color .15s;
}
.article-card:hover { text-decoration: none; border-color: var(--primary); box-shadow: 0 3px 14px rgba(11,114,196,.1); }
.article-card .thumb { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.article-card .thumb img, .article-card .thumb svg { width: 100%; height: 150px; display: block; object-fit: cover; }
.article-card .body { padding: 15px 18px 16px; }
.article-card .meta { display: flex; gap: 8px; align-items: center; font-size: 12.5px; color: var(--ink-light); margin-bottom: 6px; flex-wrap: wrap; }
.article-card h3 { font-size: 17px; line-height: 1.45; }
.article-card .zh { color: var(--ink-light); font-size: 14px; margin-top: 2px; }
.article-card .progress-note { margin-top: 8px; font-size: 12.5px; color: var(--ok); }

/* ---------------- 閱讀器 ---------------- */
.reader-head { margin: 30px 0 4px; }
.reader-head .meta { display: flex; gap: 10px; align-items: center; font-size: 13px; color: var(--ink-light); flex-wrap: wrap; }
.reader-head h1 { font-size: 27px; line-height: 1.4; margin-top: 8px; }
.reader-head .zh-title { color: var(--ink-light); font-size: 16px; margin-top: 2px; }
.reader-illust { margin: 18px 0 6px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-soft); }
.reader-illust img, .reader-illust svg { width: 100%; height: auto; display: block; max-height: 260px; object-fit: cover; }

.reader-toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 18px 0 8px;
  flex-wrap: wrap;
}
.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 6px;
  padding: 7px 16px;
  font-size: 14.5px;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 700; }
.btn.primary:hover { background: var(--primary-dark); color: #fff; }
.btn.on { background: var(--primary-tint); border-color: var(--primary); color: var(--primary-dark); font-weight: 700; }
.btn:disabled { opacity: .45; cursor: default; }
.toolbar-note { font-size: 13px; color: var(--ink-light); }

.vocab-progress { font-size: 13px; color: var(--ink-light); margin-left: auto; }
.vocab-progress b { color: var(--hint-orange); }

/* 文章本文 */
.article-body { margin: 10px 0 8px; }
.article-body p.para { margin: 0 0 20px; font-size: 17px; line-height: 1.85; }

/* 對照翻譯(兩欄) */
.article-body.bilingual .para-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line);
}
.article-body.bilingual .para-row:last-child { border-bottom: none; }
.article-body.bilingual .para-row .en { font-size: 16.5px; line-height: 1.8; }
.article-body.bilingual .para-row .zh { font-size: 15.5px; line-height: 1.9; color: #57606a; }

/* 可點單字 */
.vw {
  border-bottom: 2px dotted #b8c4cf;
  cursor: pointer;
  transition: background .12s;
  border-radius: 2px;
}
.vw:hover { background: var(--primary-tint); border-bottom-color: var(--primary); }
.vw.done { background: var(--highlight); border-bottom: 2px solid var(--highlight-deep); padding: 0 2px; }
.vw.done:hover { background: var(--highlight-deep); }
/* 填空中:原位置變空格,文字隱形所以寬度、版面完全不動 */
.vw.gap {
  color: transparent;
  background: var(--primary-tint);
  border-bottom: 2px solid var(--primary);
  border-radius: 3px 3px 0 0;
  user-select: none;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

/* 填空卡內部 */
.pop-fill-row { display: flex; gap: 6px; margin-top: 9px; }
.pop-fill-input {
  flex: 1;
  min-width: 0;
  font-family: var(--font);
  font-size: 15px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  outline: none;
  color: var(--ink);
}
.pop-fill-input:focus { border-color: var(--primary); }
.pop-fill-input.wrong { border-color: var(--bad); background: var(--bad-tint); animation: shake .25s; }
.pop-fill-input.close { border-color: var(--hint-orange); background: var(--tint-orange); }
.pop-fill-btn { padding: 6px 14px; font-size: 14px; flex: none; }
.pop-msg { font-size: 13px; color: var(--bad); margin-top: 6px; min-height: 0; }
.pop-btns { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.pop-mini {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 14px;
  padding: 3px 12px;
  font-size: 12.5px;
  color: var(--hint-orange);
  font-weight: 700;
}
.pop-mini:hover { border-color: var(--hint-orange); background: var(--tint-orange); }
.pop-mini.danger { color: var(--bad); }
.pop-mini.danger:hover { border-color: var(--bad); background: var(--bad-tint); }
.pop-zh-hint {
  background: var(--primary-tint);
  border-radius: 6px;
  padding: 8px 11px;
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--primary-dark);
}
.pop-zh-hint b { font-size: 12px; letter-spacing: 1px; display: block; margin-bottom: 2px; }

/* 單字浮層 */
.vocab-pop {
  position: absolute;
  z-index: 100;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(30, 40, 50, .16);
  padding: 13px 16px;
  max-width: 320px;
  min-width: 200px;
  font-size: 14.5px;
  line-height: 1.6;
}
.vocab-pop .pop-word { font-weight: 700; font-size: 16px; }
.vocab-pop .pop-pos { color: var(--ink-light); font-size: 13px; margin-left: 6px; }
.vocab-pop .pop-hint {
  background: var(--tint-orange);
  border-radius: 6px;
  padding: 8px 11px;
  margin-top: 8px;
  font-size: 14px;
  color: #7a4a05;
}
.vocab-pop .pop-hint b { color: var(--hint-orange); font-size: 12px; letter-spacing: 1px; display: block; margin-bottom: 2px; }
.vocab-pop .pop-zh { margin-top: 8px; font-size: 15px; }
.vocab-pop .pop-zh .base { color: var(--ink-light); font-size: 13px; }
.vocab-pop .pop-actions { margin-top: 9px; display: flex; gap: 8px; }
.vocab-pop .pop-actions button {
  font-size: 13px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 5px;
  padding: 3px 10px;
  color: var(--ink-light);
}
.vocab-pop .pop-actions button:hover { color: var(--bad); border-color: var(--bad); }
.vocab-pop .pop-ok { color: var(--ok); font-weight: 700; }
.vocab-pop .pop-close {
  position: absolute;
  top: 6px; right: 8px;
  border: none; background: none;
  color: var(--ink-light);
  font-size: 15px;
  padding: 2px 5px;
}

/* ---------------- 題目(共用) ---------------- */
.q-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 16px;
  background: #fff;
}
.q-block .q-text { font-size: 16px; margin-bottom: 13px; }
.q-block .q-no { font-weight: 700; color: var(--primary); margin-right: 8px; }
.opts { display: grid; gap: 8px; }
.opt {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 13px;
  font-size: 15px;
  background: #fff;
  text-align: left;
  width: 100%;
  line-height: 1.55;
  color: var(--ink);
}
.opt:hover { border-color: var(--primary); background: var(--primary-tint); }
.opt .letter {
  font-weight: 700;
  color: var(--ink-light);
  flex: none;
  width: 22px; height: 22px;
  border: 1.5px solid var(--line);
  border-radius: 50%;
  font-size: 12.5px;
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}
.opt.sel { border-color: var(--primary); background: var(--primary-tint); }
.opt.correct { border-color: var(--ok); background: var(--ok-tint); }
.opt.correct .letter { border-color: var(--ok); color: var(--ok); }
.opt.wrong { border-color: var(--bad); background: var(--bad-tint); }
.opt.wrong .letter { border-color: var(--bad); color: var(--bad); }
.opt:disabled { cursor: default; }
.opt:disabled:hover { background: inherit; }
.opt.correct:disabled:hover { background: var(--ok-tint); }
.opt.wrong:disabled:hover { background: var(--bad-tint); }
.opt.plain:disabled:hover { border-color: var(--line); background: #fff; }

.explain {
  margin-top: 13px;
  border-left: 3px solid var(--primary);
  background: var(--bg-soft);
  border-radius: 0 6px 6px 0;
  padding: 12px 16px;
  font-size: 14.5px;
}
.explain .verdict { font-weight: 700; margin-bottom: 4px; }
.explain .verdict.ok { color: var(--ok); }
.explain .verdict.bad { color: var(--bad); }
.explain .tr { color: var(--ink-light); margin-top: 6px; padding-top: 6px; border-top: 1px dashed var(--line); }

/* ---------------- 刷題頁 ---------------- */
.part-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 24px 0 20px; }
.part-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  background: #fff;
  text-align: left;
  transition: box-shadow .15s, border-color .15s;
}
.part-card:hover { border-color: var(--primary); box-shadow: 0 3px 14px rgba(11,114,196,.1); }
.part-card .p-label { font-size: 13px; font-weight: 700; color: var(--primary); letter-spacing: 1px; }
.part-card h3 { font-size: 18.5px; margin: 5px 0 3px; }
.part-card p { font-size: 13.5px; color: var(--ink-light); }
.part-card .p-stats { margin-top: 13px; font-size: 13px; color: var(--ink-light); }
.part-card .bar { height: 6px; background: var(--bg-soft); border-radius: 3px; margin-top: 7px; overflow: hidden; }
.part-card .bar i { display: block; height: 100%; background: var(--primary); border-radius: 3px; }

/* 刷題首頁面板 */
.practice-panels { display: grid; grid-template-columns: 1.15fr 1fr; gap: 22px; margin: 24px 0 50px; }
.practice-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  background: #fff;
}
.practice-panel .tag {
  display: inline-block;
  font-size: 12px; font-weight: 700;
  color: var(--primary);
  background: var(--primary-tint);
  border-radius: 4px;
  padding: 2px 8px;
  letter-spacing: 1px;
}
.practice-panel h2 { font-size: 20px; margin: 10px 0 4px; }
.practice-panel p { font-size: 14px; color: var(--ink-light); margin-bottom: 4px; }
.cfg-row { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.cfg-rows { display: grid; gap: 8px; margin-top: 12px; }
.cfg-part-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.cfg-part-check {
  display: flex; gap: 7px; align-items: center;
  font-size: 14.5px; cursor: pointer;
  width: 150px; flex: none;
}
.cfg-part-check input { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }
.cfg-select {
  font-family: var(--font);
  font-size: 14.5px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 10px;
  background: #fff;
  color: var(--ink);
}
.review-rows { margin-top: 12px; display: grid; gap: 8px; }
.review-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 14px;
  font-size: 14.5px;
}
.review-row span:first-child { flex: 1; }
.review-row .btn { padding: 4px 14px; font-size: 13.5px; }
@media (max-width: 860px) { .practice-panels { grid-template-columns: 1fr; } }

.drill-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 26px 0 16px;
  flex-wrap: wrap;
}
.drill-top h1 { font-size: 21px; margin-right: auto; }
.drill-filters { display: flex; gap: 6px; }
.chip {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 13.5px;
  color: var(--ink-light);
}
.chip.on { background: var(--ink); color: #fff; border-color: var(--ink); font-weight: 700; }

.drill-progress { font-size: 13.5px; color: var(--ink-light); margin: 0 0 14px; }
.drill-progress b { color: var(--primary); }

/* Part 6/7 左右欄 */
.set-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 24px; align-items: start; margin-bottom: 20px; }
.passage-box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fffdf7;
  padding: 22px 24px;
  font-size: 15.5px;
  line-height: 1.8;
  white-space: pre-line;
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}
.passage-box .p-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--ink-light);
  background: var(--bg-soft);
  display: inline-block;
  border-radius: 4px;
  padding: 1px 8px;
  margin-bottom: 8px;
  white-space: normal;
}
.passage-box + .passage-box { margin-top: 14px; }
.passage-col .passage-box { position: static; max-height: none; }
.passage-sticky-wrap { position: sticky; top: 76px; max-height: calc(100vh - 100px); overflow-y: auto; }
.passage-sticky-wrap .passage-box { position: static; max-height: none; }
.gap-mark {
  display: inline-block;
  border-bottom: 2px solid var(--primary);
  background: var(--primary-tint);
  border-radius: 3px 3px 0 0;
  padding: 0 10px;
  font-weight: 700;
  color: var(--primary-dark);
  font-size: 13.5px;
}
.gap-mark.answered { background: var(--highlight); border-bottom-color: var(--highlight-deep); color: var(--ink); }

.set-translation {
  margin: 6px 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  padding: 16px 20px;
  font-size: 14.5px;
  line-height: 1.9;
  color: #57606a;
  white-space: pre-line;
}

/* 題號導覽 */
.q-nav { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 22px; }
.q-nav button {
  width: 34px; height: 30px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 5px;
  font-size: 12.5px;
  color: var(--ink-light);
}
.q-nav button:hover { border-color: var(--primary); color: var(--primary); }
.q-nav button.cur { border-color: var(--ink); color: var(--ink); font-weight: 700; box-shadow: inset 0 0 0 1px var(--ink); }
.q-nav button.ok { background: var(--ok-tint); border-color: #bcdcc3; color: var(--ok); }
.q-nav button.ng { background: var(--bad-tint); border-color: #ecc7c7; color: var(--bad); }

.drill-nav-btns { display: flex; gap: 10px; margin: 6px 0 50px; }

.result-note { font-size: 14px; color: var(--ink-light); margin: 8px 0 18px; }

/* ---------------- 寫作練習 ---------------- */
/* 單元路徑 */
.unit-list { margin: 18px 0 30px; display: grid; gap: 8px; }
.unit-row {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 11px 16px;
  color: var(--ink);
  font-size: 15px;
}
.unit-row:hover { text-decoration: none; border-color: var(--primary); }
.unit-row.done { background: var(--bg-soft); }
.unit-num {
  width: 28px; height: 28px; flex: none;
  border: 1.5px solid var(--line);
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--ink-light); font-weight: 700;
}
.unit-num.ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.unit-title { display: flex; flex-direction: column; min-width: 0; }
.unit-sub {
  font-size: 12.5px; color: var(--ink-light); font-weight: 400;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 460px;
}
.unit-head { margin: 26px 0 18px; }
.unit-back { font-size: 13.5px; }
.unit-block { padding: 26px 30px; }
.unit-title-lg { font-size: 20px; margin-bottom: 12px; }

/* 技巧課(整頁寬鬆排版) */
.lesson-view {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 30px 34px;
}
.lesson-title { font-size: 22px; margin-bottom: 10px; }
.lesson-intro { color: var(--ink-light); font-size: 15px; line-height: 1.85; margin-bottom: 24px; }
.lesson-point { margin-bottom: 26px; }
.lp-num { font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--primary); margin-bottom: 4px; }
.lp-tip { font-size: 16px; font-weight: 700; line-height: 1.7; margin-bottom: 10px; }
.lp-ex-box {
  border-left: 3px solid var(--primary);
  background: var(--bg-soft);
  border-radius: 0 8px 8px 0;
  padding: 13px 18px;
}
.lp-ex { font-size: 16px; line-height: 1.7; }
.lp-zh { font-size: 13.5px; color: var(--ink-light); margin-top: 4px; }

.assembly {
  min-height: 44px;
  border: 1.5px dashed var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
  padding: 7px 9px;
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  margin-bottom: 8px;
}
.assembly.done-line { border-style: solid; border-color: var(--highlight-deep); background: var(--highlight); font-size: 15.5px; padding: 10px 14px; }
.assembly-hint { color: var(--ink-light); font-size: 13px; }
.tiles { display: flex; flex-wrap: wrap; gap: 6px; }
.tile {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 14.5px;
  color: var(--ink);
  font-family: var(--font);
}
.tile:hover { border-color: var(--primary); background: var(--primary-tint); }
.tile.picked { background: var(--primary-tint); border-color: var(--primary); color: var(--primary-dark); font-weight: 700; }

.write-area {
  width: 100%;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  resize: vertical;
  outline: none;
  color: var(--ink);
}
.write-area:focus { border-color: var(--primary); }
.wc-bar { display: flex; gap: 12px; justify-content: flex-end; margin-top: 4px; }
.wc { font-size: 12.5px; color: var(--ink-light); }

.kw-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 13.5px; color: var(--ink-light); margin-bottom: 10px; }
.kw-chip {
  background: var(--tint-orange);
  color: #b05e0a;
  border-radius: 4px;
  padding: 1px 9px;
  font-size: 13px;
  font-weight: 700;
}
.model-box { background: var(--ok-tint); border-radius: 8px; padding: 12px 16px; margin-top: 10px; font-size: 14.5px; }
.model-box b { display: block; font-size: 12.5px; letter-spacing: 1px; color: var(--ok); margin-bottom: 6px; }
.model-line { margin-bottom: 6px; }
.model-line.pre { white-space: pre-line; line-height: 1.75; }
.check-box { background: var(--bg-soft); border-radius: 8px; padding: 12px 16px; margin-top: 10px; font-size: 14px; }
.check-box b { display: block; font-size: 12.5px; letter-spacing: 1px; color: var(--ink-light); margin-bottom: 6px; }
.check-item { display: block; padding: 3px 0; cursor: pointer; }
.task-list { font-size: 14.5px; margin-bottom: 10px; }
.task-list b { font-size: 13px; color: var(--primary-dark); }
.task-list ol { margin: 4px 0 0 22px; }
.passage-box.letter { background: #fff; }
.outline-grid { display: grid; grid-template-columns: 1fr; gap: 18px; margin-bottom: 8px; }
.outline-cell b {
  display: flex; align-items: baseline; gap: 10px;
  font-size: 15px; color: var(--primary-dark); margin-bottom: 4px;
}
.outline-target { font-size: 12.5px; color: var(--ink-light); font-weight: 400; }
.outline-hint { font-size: 13.5px; color: var(--ink-light); line-height: 1.75; margin-bottom: 8px; }

/* ---------------- 聽力 ---------------- */
.player { display: flex; align-items: center; gap: 12px; margin: 6px 0; }
.player-btn { padding: 9px 22px; font-size: 15px; }
.player-note { font-size: 13px; color: var(--ink-light); }
.letter-row { display: flex; gap: 12px; margin: 10px 0 4px; }
.letter-big {
  width: 56px; height: 56px;
  border: 1.5px solid var(--line); border-radius: 10px;
  background: #fff; font-size: 20px; font-weight: 700; color: var(--ink);
}
.letter-big:hover { border-color: var(--primary); background: var(--primary-tint); }
.letter-big.correct { border-color: var(--ok); background: var(--ok-tint); color: var(--ok); }
.letter-big.wrong { border-color: var(--bad); background: var(--bad-tint); color: var(--bad); }
.letter-big:disabled { cursor: default; }
.listen-photo { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-soft); margin-bottom: 12px; }
.listen-photo img { width: 100%; max-height: 340px; object-fit: contain; display: block; }
.photo-missing { padding: 60px 0; text-align: center; color: var(--ink-light); font-size: 14px; }
.transcript-box { background: var(--bg-soft); border-radius: 8px; padding: 14px 18px; margin-top: 12px; font-size: 14.5px; }
.transcript-box b { display: block; font-size: 12.5px; letter-spacing: 1px; color: var(--ink-light); margin-bottom: 6px; }
.tr-en { white-space: pre-line; line-height: 1.8; }
.tr-zh { white-space: pre-line; line-height: 1.9; color: #57606a; font-size: 13.5px; margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--line); }

/* 英語耳 */
.speed-sel { padding: 5px 8px; font-size: 12.5px; }
.shadow-stage {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  padding: 34px 10px;
  color: var(--ink);
  background: var(--bg-soft);
  border-radius: 10px;
  margin-bottom: 12px;
}
.shadow-stage.pulse { color: var(--hint-orange); animation: pulse 1s infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}
.dict-diff { margin: 8px 0 4px; line-height: 2; }
.dict-word { display: inline-block; margin: 0 3px; padding: 1px 6px; border-radius: 4px; font-size: 15px; }
.dict-word.hit { background: var(--ok-tint); color: var(--ok); }
.dict-word.miss { background: var(--bad-tint); color: var(--bad); font-weight: 700; }
.pair-row { display: flex; gap: 14px; margin-top: 10px; }
.pair-btn {
  flex: 1;
  border: 1.5px solid var(--line); border-radius: 10px;
  background: #fff; padding: 16px 10px;
  font-size: 19px; font-weight: 700; color: var(--ink);
}
.pair-btn:hover { border-color: var(--primary); background: var(--primary-tint); }
.pair-btn.correct { border-color: var(--ok); background: var(--ok-tint); color: var(--ok); }
.pair-btn.wrong { border-color: var(--bad); background: var(--bad-tint); color: var(--bad); }

/* ---------------- 頁尾 ---------------- */
footer {
  border-top: 1px solid var(--line);
  margin-top: 30px;
  padding: 22px 0 30px;
  font-size: 13px;
  color: var(--ink-light);
}

/* ---------------- 學生檔案 ---------------- */
.profile-widget { position: relative; margin-left: 12px; flex: none; }
.profile-btn {
  display: flex; align-items: center; gap: 7px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 20px;
  padding: 4px 12px 4px 5px;
  font-size: 14px;
  color: var(--ink);
  white-space: nowrap;
}
.profile-btn:hover { border-color: var(--primary); }
.profile-dot {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 13px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  flex: none;
}
.profile-menu {
  position: absolute;
  right: 0; top: calc(100% + 8px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(30,40,50,.16);
  min-width: 230px;
  padding: 8px;
  z-index: 120;
}
.pm-head { font-size: 12px; font-weight: 700; color: var(--ink-light); letter-spacing: 1px; padding: 4px 8px; }
.pm-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%;
  border: none; background: none;
  text-align: left;
  padding: 8px 10px;
  font-size: 14.5px;
  border-radius: 6px;
  color: var(--ink);
}
.pm-item:hover { background: var(--bg-soft); }
.pm-item.cur { color: var(--primary); font-weight: 700; }
.pm-item.danger { color: var(--bad); }
.pm-item.big { border: 1px solid var(--line); margin-bottom: 6px; }
.pm-sep { border-top: 1px solid var(--line); margin: 6px 4px; }

.modal-mask {
  position: fixed; inset: 0;
  background: rgba(30, 40, 50, .45);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal {
  background: #fff;
  border-radius: 10px;
  padding: 26px 28px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 10px 40px rgba(20,30,40,.3);
}
.modal h2 { font-size: 20px; }
.modal-sub { color: var(--ink-light); font-size: 13.5px; margin: 6px 0 14px; }
.modal-list { max-height: 200px; overflow-y: auto; }
.modal-row { display: flex; gap: 8px; margin-top: 6px; }
.modal-input {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 15px;
  font-family: var(--font);
  outline: none;
}
.modal-input:focus { border-color: var(--primary); }

/* ---------------- 程度檢測 ---------------- */
.diag-intro { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 34px; margin: 26px 0 50px; background: #fff; }
.diag-intro h2 { font-size: 21px; margin-bottom: 8px; }
.diag-intro ul { margin: 12px 0 20px 22px; color: var(--ink-light); font-size: 14.5px; }
.diag-intro li { margin-bottom: 4px; }
.diag-bar { height: 8px; background: var(--bg-soft); border-radius: 4px; overflow: hidden; margin: 8px 0 20px; }
.diag-bar i { display: block; height: 100%; background: var(--primary); border-radius: 4px; transition: width .2s; }
.diag-count { font-size: 13.5px; color: var(--ink-light); }

/* 檢測報告 */
.report-head {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin: 8px 0 20px;
  background: var(--bg-soft);
}
.report-head .who { font-size: 13.5px; color: var(--ink-light); }
.report-head h2 { font-size: 22px; margin: 4px 0 2px; }
.band-line { display: flex; gap: 26px; margin-top: 14px; flex-wrap: wrap; }
.band-line .item b { font-size: 22px; color: var(--primary); }
.band-line .item span { display: block; font-size: 12.5px; color: var(--ink-light); }
.band-note { font-size: 12.5px; color: var(--ink-light); margin-top: 10px; }

.bar-line { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 14px; }
.bar-line .lb { width: 130px; flex: none; }
.bar-line .track { flex: 1; height: 10px; background: var(--bg-soft); border-radius: 5px; overflow: hidden; }
.bar-line .track i { display: block; height: 100%; border-radius: 5px; background: var(--primary); }
.bar-line .track i.weak { background: var(--bad); }
.bar-line .track i.mid { background: var(--hint-orange); }
.bar-line .val { width: 74px; text-align: right; color: var(--ink-light); font-size: 13px; flex: none; }

.verdict-pill { display: inline-block; font-size: 12.5px; font-weight: 700; border-radius: 4px; padding: 1px 8px; }
.verdict-pill.good { background: var(--ok-tint); color: var(--ok); }
.verdict-pill.mid { background: var(--tint-orange); color: #b05e0a; }
.verdict-pill.weak { background: var(--bad-tint); color: var(--bad); }

table.cat-table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 6px 0 10px; }
table.cat-table th, table.cat-table td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; }
table.cat-table th { font-size: 12.5px; color: var(--ink-light); letter-spacing: 1px; font-weight: 700; }
table.cat-table td.num { white-space: nowrap; }

.skill-list { margin: 4px 0 8px; padding-left: 0; list-style: none; font-size: 14.5px; }
.skill-list li { padding: 5px 0 5px 22px; position: relative; }
.skill-list li::before { content: ''; position: absolute; left: 4px; top: 13px; width: 8px; height: 8px; border-radius: 50%; }
.skill-list.good li::before { background: var(--ok); }
.skill-list.weak li::before { background: var(--bad); }
.skill-list .why { color: var(--ink-light); font-size: 13px; display: block; }

.wrong-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 12px; background: #fff; font-size: 14.5px; }
.wrong-item .w-meta { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; flex-wrap: wrap; }
.wrong-item .w-q { margin-bottom: 6px; }
.wrong-item .w-ans { margin-bottom: 6px; }
.wrong-item .w-ans .you { color: var(--bad); font-weight: 700; }
.wrong-item .w-ans .right { color: var(--ok); font-weight: 700; }
.wrong-item .w-skill { background: var(--primary-tint); border-radius: 6px; padding: 7px 11px; font-size: 13.5px; color: var(--primary-dark); margin-bottom: 6px; }
.wrong-item .w-exp { color: #57606a; font-size: 13.5px; }

.next-steps { border: 1px solid var(--line); border-left: 3px solid var(--primary); border-radius: var(--radius); padding: 16px 20px; margin: 14px 0 30px; font-size: 14.5px; }
.next-steps li { margin: 4px 0 4px 20px; }

/* 能力分析:級距刻度尺與長條圖 */
.band-scale { position: relative; margin: 26px 8px 34px; height: 40px; }
.bs-track {
  position: absolute; left: 0; right: 0; top: 14px; height: 10px;
  border-radius: 5px; background: var(--bg-soft); border: 1px solid var(--line);
}
.bs-seg { position: absolute; top: 14px; height: 12px; margin-top: -1px; border-radius: 6px; background: var(--primary); }
.bs-label {
  position: absolute; top: -10px; transform: translateX(-50%);
  font-size: 14px; font-weight: 700; color: var(--primary-dark); white-space: nowrap;
}
.bs-tick { position: absolute; top: 28px; transform: translateX(-50%); font-size: 11.5px; color: var(--ink-light); }
.bar-line .track i.ok { background: var(--ok); }
.bar-go { font-size: 13px; flex: none; width: 34px; }
.cat-bars { margin-top: 6px; }
.cat-bars .bar-line { margin-bottom: 10px; }
.cat-bars .lb { width: 150px; font-size: 13.5px; }

/* 能力分析:錯題分類列 */
.wrong-cat-row {
  display: flex; justify-content: space-between; align-items: center;
  width: 100%;
  border: none; border-top: 1px solid var(--line);
  background: none;
  padding: 9px 4px;
  font-size: 14.5px; color: var(--ink);
  text-align: left;
}
.wrong-cat-row:hover { background: var(--bg-soft); }
.wrong-cat-row b { color: var(--bad); font-size: 13.5px; }
.wrong-cat-list { padding: 2px 4px 10px; }
.wrong-cat-item {
  font-size: 13.5px; color: var(--ink-light);
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--line);
  margin: 4px 0;
}

@media print {
  .topbar, .drill-nav-btns, .no-print, footer { display: none !important; }
  body { font-size: 13px; }
  .report-head { background: none; }
}

/* ---------------- RWD ---------------- */
@media (max-width: 860px) {
  /* 頂欄:第一列=品牌+學生選單,第二列=可橫向滑動的導覽 */
  .topbar-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 8px 14px 0;
    gap: 0 10px;
  }
  .brand { order: 1; flex: 1; min-width: 0; font-size: 16px; }
  .profile-widget { order: 2; margin-left: auto; }
  .profile-btn { max-width: 150px; overflow: hidden; }
  .topnav {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 6px 0 8px;
  }
  .topnav::-webkit-scrollbar { display: none; }
  .topnav a { padding: 5px 11px; font-size: 14px; }

  .container, .container-narrow { padding: 0 16px; }
  .hero-inner { padding: 30px 16px 34px; }
  .hero h1 { font-size: 24px; }
  .hero .stats { gap: 20px; margin-top: 18px; }

  .module-cards, .article-list, .howto-steps, .part-cards { grid-template-columns: 1fr; gap: 14px; }
  .module-card { padding: 20px 20px 18px; }
  .practice-panels { gap: 14px; }
  .practice-panel { padding: 18px 18px 16px; }
  .cfg-part-check { width: 126px; font-size: 14px; }

  .set-layout { grid-template-columns: 1fr; gap: 14px; }
  .passage-box, .passage-sticky-wrap { position: static; max-height: none; }
  .passage-box { padding: 16px 16px; font-size: 15px; }
  .q-block { padding: 16px 16px; }
  .unit-block { padding: 18px 18px; }
  .lesson-view { padding: 20px 18px; }
  .report-head { padding: 18px 18px; }
  .diag-intro { padding: 20px 18px; }
  .drill-top h1 { font-size: 18px; }
  .page-head h1 { font-size: 22px; }
  .reader-head h1 { font-size: 22px; }

  .article-body.bilingual .para-row { grid-template-columns: 1fr; gap: 6px; }
  .article-body.bilingual .para-row .zh { background: var(--bg-soft); border-radius: 6px; padding: 8px 12px; }
  .article-body p.para { font-size: 16px; }

  .vocab-pop { max-width: calc(100vw - 20px); }
  .modal { padding: 20px 18px; }

  .bar-line { gap: 8px; }
  .bar-line .lb { width: 92px; flex: none; font-size: 13px; }
  .bar-line .val { width: auto; min-width: 56px; font-size: 12px; }
  .cat-bars .lb { width: 104px; }
  table.cat-table { display: block; overflow-x: auto; }
  .unit-sub { max-width: 56vw; }
  .outline-grid { gap: 14px; }
  .wc-bar { flex-wrap: wrap; }
}