/* english-mastery · 中小学英语学习技巧归档
 * 视觉风格对齐 math-mastery：纯前端、卡片网格、轻量动效、可离线
 * 主题：明亮、彩色、不那么枯燥（孩子向）
 */
:root {
  --primary: #2bb673;
  --junior: #2f80ed;
  --senior: #eb5757;
  --ink: #1f2733;
  --muted: #6b7785;
  --line: #e7ecf1;
  --bg: #f5f8fb;
  --card: #ffffff;
  --gold: #f2b705;
  --shadow: 0 6px 20px rgba(31, 39, 51, .08);
  --shadow-h: 0 10px 30px rgba(31, 39, 51, .14);
  --radius: 16px;
  --maxw: 1080px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--junior); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 顶部 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: linear-gradient(120deg, #2bb673 0%, #2f80ed 55%, #eb5757 100%);
  color: #fff; padding: 14px 18px;
  box-shadow: var(--shadow);
}
.topbar .inner { max-width: var(--maxw); margin: 0 auto; display: flex; align-items: center; gap: 12px; }
.logo { font-size: 22px; font-weight: 800; letter-spacing: .5px; display: flex; align-items: center; gap: 8px; }
.logo .fox { font-size: 26px; }
.tagline { font-size: 12px; opacity: .92; margin-left: 2px; }
.topbar .spacer { flex: 1; }
.streak {
  background: rgba(255,255,255,.18); border-radius: 999px;
  padding: 6px 12px; font-size: 13px; font-weight: 700; display: flex; align-items: center; gap: 6px;
}
.streak b { color: var(--gold); }

/* ---------- 容器 ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 18px; }
.hero {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px 22px; margin-bottom: 16px; border: 1px solid var(--line);
}
.hero h1 { margin: 0 0 6px; font-size: 20px; }
.hero p { margin: 0; color: var(--muted); font-size: 14px; }
.stat-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.stat {
  background: var(--bg); border-radius: 12px; padding: 8px 14px; font-size: 13px; color: var(--muted);
  border: 1px solid var(--line);
}
.stat b { color: var(--ink); font-size: 16px; }

/* ---------- 筛选 ---------- */
.filters { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
.grade-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.grade-tab {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  padding: 9px 16px; border-radius: 999px; cursor: pointer; font-weight: 700; font-size: 14px;
  transition: all .15s; box-shadow: var(--shadow);
}
.grade-tab:hover { transform: translateY(-1px); }
.grade-tab.active { color: #fff; border-color: transparent; background: var(--primary); }
.grade-tab.active[data-grade="all"] { background: #1f2733; }
.grade-tab.active[data-grade="primary"] { background: var(--primary); }
.grade-tab.active[data-grade="junior"] { background: var(--junior); }
.grade-tab.active[data-grade="senior"] { background: var(--senior); }

.dim-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
  padding: 6px 12px; border-radius: 999px; cursor: pointer; font-size: 13px; transition: all .15s;
}
.chip:hover { color: var(--ink); }
.chip.active { background: #eef4ff; color: var(--junior); border-color: #c9ddff; font-weight: 700; }

.search {
  width: 100%; max-width: 360px; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line);
  font-size: 14px; outline: none; background: var(--card);
}
.search:focus { border-color: var(--junior); }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; cursor: pointer; box-shadow: var(--shadow); transition: all .18s; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-h); }
.card .top { display: flex; align-items: center; gap: 10px; }
.card .icon { font-size: 30px; }
.card .badge-grade {
  margin-left: auto; font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; color: #fff;
}
.card h3 { margin: 10px 0 4px; font-size: 16px; }
.card .summary { color: var(--muted); font-size: 13px; margin: 0; min-height: 38px; }
.card .meta { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.tag { font-size: 11px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); padding: 2px 8px; border-radius: 999px; }
.card .done-flag {
  position: absolute; top: 10px; right: 10px; font-size: 18px; opacity: 0; transition: opacity .2s;
}
.card.done .done-flag { opacity: 1; }
.card.done { border-color: #bfe9d2; }
.card .progress-mini { height: 5px; background: var(--bg); border-radius: 999px; margin-top: 12px; overflow: hidden; }
.card .progress-mini > i { display: block; height: 100%; background: var(--primary); width: 0; }

/* ---------- 详情 ---------- */
.detail { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.back {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer; color: var(--muted); font-size: 14px; font-weight: 700;
  margin-bottom: 12px; background: none; border: none; padding: 4px 0;
}
.back:hover { color: var(--ink); }
.detail .head { display: flex; align-items: center; gap: 14px; }
.detail .head .icon { font-size: 44px; }
.detail h2 { margin: 0; font-size: 22px; }
.detail .sub { color: var(--muted); font-size: 14px; margin: 4px 0 0; }
.detail .meta { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 4px; }
.why {
  background: #fff8e6; border: 1px solid #f3e2b3; border-radius: 12px; padding: 12px 14px; margin: 16px 0;
  font-size: 14px; color: #6b5510;
}
.why b { color: #8a6d00; }

.section-title { font-size: 15px; font-weight: 800; margin: 20px 0 10px; display: flex; align-items: center; gap: 8px; }
.section-title .bar { width: 4px; height: 16px; border-radius: 2px; background: var(--junior); }

.steps { list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li {
  position: relative; padding: 10px 12px 10px 44px; border: 1px solid var(--line); border-radius: 12px;
  margin-bottom: 8px; background: var(--bg); font-size: 14px;
}
.steps li::before {
  counter-increment: s; content: counter(s); position: absolute; left: 10px; top: 10px;
  width: 24px; height: 24px; border-radius: 50%; background: var(--junior); color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 13px;
}
.tips { list-style: none; padding: 0; margin: 0; }
.tips li { padding: 8px 0 8px 24px; position: relative; font-size: 14px; border-bottom: 1px dashed var(--line); }
.tips li::before { content: "💡"; position: absolute; left: 0; top: 8px; }

/* 视频 */
.video-list { display: flex; flex-direction: column; gap: 10px; }
.video-item {
  display: flex; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 12px; padding: 12px;
  background: var(--bg); transition: all .15s;
}
.video-item:hover { border-color: #c9ddff; }
.video-item .play { font-size: 26px; }
.video-item .vt { font-weight: 700; font-size: 14px; }
.video-item .vu { font-size: 12px; color: var(--muted); word-break: break-all; }
.video-embed { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: 12px; margin-top: 10px; }
.bv-box { margin-top: 10px; }

/* 练习 */
.practice {
  border: 1px solid var(--line); border-radius: 12px; padding: 16px; background: #fbfdff; margin-top: 6px;
}
.practice .p-type { font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.flashcard-deck { display: flex; flex-wrap: wrap; gap: 10px; }
.flip {
  width: 120px; height: 80px; perspective: 600px; cursor: pointer; user-select: none;
}
.flip .inner { width: 100%; height: 100%; position: relative; transition: transform .4s; transform-style: preserve-3d; }
.flip.flipped .inner { transform: rotateY(180deg); }
.flip .face {
  position: absolute; inset: 0; backface-visibility: hidden; border-radius: 10px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; font-weight: 800; box-shadow: var(--shadow); border: 1px solid var(--line);
}
.flip .front { background: #fff; color: var(--junior); font-size: 18px; }
.flip .back { background: var(--primary); color: #fff; transform: rotateY(180deg); font-size: 15px; }
.flip .rate { display: flex; gap: 6px; margin-top: 6px; }
.flip .rate button {
  border: none; border-radius: 8px; padding: 4px 10px; font-size: 12px; font-weight: 700; cursor: pointer; color: #fff;
}
.flip .rate .no { background: #eb5757; }
.flip .rate .yes { background: var(--primary); }

.q { border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 12px; background: #fff; }
.q .qt { font-weight: 700; margin-bottom: 10px; }
.q .opts { display: flex; flex-direction: column; gap: 8px; }
.q .opt {
  border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; cursor: pointer; font-size: 14px; background: var(--bg);
  transition: all .12s; text-align: left;
}
.q .opt:hover { border-color: #c9ddff; }
.q .opt.right { background: #e6f7ee; border-color: #9fe0c0; color: #1c7a4d; }
.q .opt.wrong { background: #fdeaea; border-color: #f3b5b5; color: #b23b3b; }
.q .feedback { font-size: 13px; margin-top: 8px; font-weight: 700; }

.fill-q { margin-bottom: 14px; }
.fill-q .sentence { font-size: 15px; margin-bottom: 6px; }
.fill-q input {
  padding: 8px 12px; border-radius: 10px; border: 1px solid var(--line); font-size: 15px; width: 200px; outline: none;
}
.fill-q input:focus { border-color: var(--junior); }
.fill-q .check { margin-left: 8px; border: none; background: var(--junior); color: #fff; border-radius: 10px; padding: 8px 14px; cursor: pointer; font-weight: 700; }
.fill-q .res { margin-left: 10px; font-weight: 700; }

.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.checklist input { width: 18px; height: 18px; }

.mark-done {
  margin-top: 16px; display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff;
  border: none; border-radius: 999px; padding: 11px 22px; font-size: 15px; font-weight: 800; cursor: pointer; box-shadow: var(--shadow);
}
.mark-done:hover { filter: brightness(1.05); }
.mark-done.done { background: #1f2733; }

.source { margin-top: 18px; font-size: 12px; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 10px; }

/* 进度条 */
.progress-bar { height: 8px; background: var(--bg); border-radius: 999px; overflow: hidden; margin: 16px 0 0; border: 1px solid var(--line); }
.progress-bar > i { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--junior)); transition: width .4s; }

/* 撒花 */
.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 999; overflow: hidden; }
.confetti i { position: absolute; top: -10px; width: 10px; height: 14px; opacity: .9; animation: fall 1.6s linear forwards; }
@keyframes fall { to { transform: translateY(105vh) rotate(540deg); opacity: 0; } }

/* 空状态 */
.empty { text-align: center; color: var(--muted); padding: 40px; font-size: 14px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 24px; }

@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .card .summary { min-height: auto; }
  .topbar .tagline { display: none; }
}

/* ---------- 跟读练习（Web Speech API） ---------- */
.read-box { border: 1px solid var(--line); border-radius: 12px; padding: 16px; background: #f3fbf6; margin-top: 6px; }
.read-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.read-toolbar select { padding: 5px 8px; border-radius: 8px; border: 1px solid var(--line); background: #fff; font-size: 13px; }
.read-slow { display: flex; align-items: center; gap: 4px; cursor: pointer; }
.read-hint { font-size: 12px; }
.read-row { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 10px; background: #fff; }
.read-en { font-size: 17px; font-weight: 800; color: var(--ink); }
.read-zh { font-size: 13px; color: var(--muted); margin-top: 2px; }
.read-btns { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.read-btns button { border: 1px solid var(--line); border-radius: 10px; padding: 7px 12px; cursor: pointer; font-size: 13px; font-weight: 700; background: var(--bg); transition: all .12s; }
.read-btns .rb-play { background: var(--junior); color: #fff; border-color: transparent; }
.read-btns .rb-record { background: var(--primary); color: #fff; border-color: transparent; }
.read-btns button:hover:not(:disabled) { filter: brightness(1.05); }
.read-btns button:disabled { cursor: not-allowed; }
.read-fb { font-size: 13px; margin-top: 8px; min-height: 18px; }
.read-fb.ok { color: #1c7a4d; }
.read-fb.low { color: #b23b3b; }
.read-fb audio { display: block; margin-top: 6px; width: 100%; max-width: 360px; }
.read-summary { font-size: 13px; font-weight: 700; color: var(--primary); margin-top: 6px; }

/* ---------- 单词词库模块 ---------- */
.top-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.top-tab { padding: 8px 18px; border-radius: 999px; background: #eef1f5; color: #445; cursor: pointer; font-weight: 700; font-size: 14px; user-select: none; }
.top-tab:hover { background: #e3e8ef; }
.top-tab.active { background: var(--primary); color: #fff; }
.words-intro { color: var(--muted); font-size: 13px; margin: 4px 0 14px; }
.unit-card .summary { color: var(--muted); }
.words-detail { max-width: 860px; margin: 0 auto; }
.fill-list { display: flex; flex-direction: column; gap: 8px; }
.word-read { background: #f3fbf6; }
.read-list { display: flex; flex-direction: column; gap: 0; }

/* 单词单元：练习模式切换（子标签）+ 逐词紧凑布局 */
.mode-tabs { display: flex; gap: 8px; margin: 18px 0 6px; }
.mode-tab { padding: 9px 18px; border-radius: 10px; background: #eef1f5; color: #445; cursor: pointer; font-weight: 700; font-size: 14px; user-select: none; }
.mode-tab:hover { background: #e3e8ef; }
.mode-tab.active { background: var(--primary); color: #fff; }
.mode-pane { margin-top: 4px; }

.run-box { border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: #fff; max-width: 560px; }
.run-head { font-size: 13px; color: var(--muted); font-weight: 700; margin-bottom: 10px; }
.run-idx { color: var(--primary); }
.run-zh { font-size: 22px; font-weight: 800; color: #1f2630; margin-bottom: 14px; }
.run-word-en { font-size: 22px; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.run-word-zh { font-size: 14px; font-weight: 600; color: var(--muted); }
.run-input { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.run-input input { flex: 1; min-width: 180px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; font-size: 15px; outline: none; }
.run-input input:focus { border-color: var(--junior); }
.run-input .check { border: none; background: var(--junior); color: #fff; border-radius: 10px; padding: 10px 18px; cursor: pointer; font-weight: 700; }
.run-input .res { font-weight: 700; margin-left: 4px; }
.run-input .rb-play { border: none; background: var(--junior); color: #fff; border-radius: 10px; padding: 9px 16px; cursor: pointer; font-weight: 700; font-size: 14px; }
.run-input .rb-record { border: none; background: var(--primary); color: #fff; border-radius: 10px; padding: 9px 16px; cursor: pointer; font-weight: 700; font-size: 14px; }
.run-input button:disabled { opacity: .5; cursor: not-allowed; }
.run-nav { display: flex; gap: 10px; margin-top: 14px; }
.run-nav .ghost { border: 1px solid var(--line); background: #fff; color: #445; border-radius: 10px; padding: 9px 16px; cursor: pointer; font-weight: 700; }
.run-nav .ghost:disabled { opacity: .4; cursor: not-allowed; }
.run-nav .ghost:not(:disabled):hover { background: #f3f5f8; }
.run-nav .check-all { border: none; background: var(--gold); color: #4a3a00; border-radius: 10px; padding: 9px 18px; cursor: pointer; font-weight: 800; }
.run-nav .check-all:hover { filter: brightness(1.04); }

/* 拼写自测：一组一组 */
.spell-group { display: flex; flex-direction: column; gap: 10px; }
.spell-row { display: grid; grid-template-columns: 30px 1fr auto auto 1fr; align-items: center; gap: 10px; padding: 10px 12px; background: #f7f9fb; border: 1px solid var(--line); border-radius: 10px; }
.sp-no { color: var(--muted); font-weight: 700; text-align: center; }
.sp-zh { font-size: 16px; font-weight: 700; color: #1f2630; }
.sp-in { padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font-size: 14px; outline: none; min-width: 130px; }
.sp-in:focus { border-color: var(--junior); }
.sp-check { border: none; background: var(--junior); color: #fff; border-radius: 8px; padding: 8px 14px; cursor: pointer; font-weight: 700; }
.sp-res { font-weight: 700; min-width: 90px; }

/* 跟读：一组一组 */
.read-group { display: flex; flex-direction: column; gap: 10px; }
.read-row-word { display: grid; grid-template-columns: 30px 1fr auto; align-items: center; gap: 10px; padding: 10px 12px; background: #f7f9fb; border: 1px solid var(--line); border-radius: 10px; }
.rw-no { color: var(--muted); font-weight: 700; text-align: center; }
.rw-text { font-size: 15px; }
.rw-en { font-weight: 800; color: #1f2630; }
.rw-zh { color: var(--muted); font-size: 13px; }
.rw-btns { display: flex; gap: 8px; }
.rw-btns .rb-play { border: none; background: var(--junior); color: #fff; border-radius: 8px; padding: 7px 12px; cursor: pointer; font-weight: 700; font-size: 13px; }
.rw-btns .rb-record { border: none; background: var(--primary); color: #fff; border-radius: 8px; padding: 7px 12px; cursor: pointer; font-weight: 700; font-size: 13px; }
.rw-btns button:disabled { opacity: .5; cursor: not-allowed; }
.read-row-word .read-fb { grid-column: 1 / -1; margin-top: 2px; }
/* ---------- 拼读拆解（6 步） ---------- */
.ph-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.ph-word { font-size: 26px; font-weight: 800; color: var(--ink); }
.ph-zh { font-size: 14px; color: var(--muted); font-weight: 600; }
.ph-badge { font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; white-space: nowrap; }
.ph-badge.ok { background: #e6f7ee; color: #1c7a4d; border: 1px solid #9fe0c0; }
.ph-badge.rule { background: #fff5e0; color: #8a6d00; border: 1px solid #f3e2b3; }
.ph-stepbar { display: flex; gap: 6px; flex-wrap: wrap; margin: 6px 0 12px; }
.ph-step { font-size: 13px; font-weight: 700; padding: 6px 10px; border-radius: 999px; background: #eef1f5; color: #556; cursor: pointer; user-select: none; transition: all .15s; }
.ph-step.done { background: #e6f0ff; color: #2f80ed; }
.ph-step.active { background: var(--senior); color: #fff; }
.ph-body { min-height: 120px; }
.ph-learn-word, .ph-big { font-size: 30px; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.ph-syl { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 4px; letter-spacing: .5px; }
.ph-syl .dot { color: var(--muted); margin: 0 2px; }
.ph-ipa { font-size: 18px; color: var(--junior); font-weight: 700; margin-bottom: 10px; font-family: "Lucida Sans Unicode", "Segoe UI", sans-serif; }
.ph-play { border: none; background: var(--junior); color: #fff; border-radius: 10px; padding: 9px 16px; cursor: pointer; font-weight: 700; font-size: 14px; margin-top: 4px; transition: filter .12s; }
.ph-play:hover { filter: brightness(1.05); }
.ph-rec { border: none; background: var(--primary); color: #fff; border-radius: 10px; padding: 9px 16px; cursor: pointer; font-weight: 700; font-size: 14px; margin-top: 4px; }
.ph-rec:disabled { opacity: .5; cursor: not-allowed; }
.ph-read-btns { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.ph-map { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 10px; }
.ph-grapheme { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 52px; padding: 8px 6px; background: #f7f9fb; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; transition: all .12s; }
.ph-grapheme:hover { border-color: #c9ddff; background: #eef4ff; }
.ph-grapheme.silent { opacity: .6; cursor: default; }
.ph-g { font-size: 18px; font-weight: 800; color: var(--ink); }
.ph-s { font-size: 14px; color: var(--junior); font-weight: 700; }
.ph-a { font-size: 11px; color: var(--muted); }
.ph-note { font-size: 12px; color: var(--muted); margin-top: 8px; }
.ph-q { font-size: 15px; font-weight: 700; color: var(--ink); margin: 6px 0 10px; }
.ph-choices { display: flex; flex-direction: column; gap: 8px; }
.ph-choice { border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px; cursor: pointer; font-size: 16px; font-weight: 700; background: var(--bg); text-align: left; transition: all .12s; }
.ph-choice:hover:not(:disabled) { border-color: #c9ddff; }
.ph-choice.right { background: #e6f7ee; border-color: #9fe0c0; color: #1c7a4d; }
.ph-choice.wrong { background: #fdeaea; border-color: #f3b5b5; color: #b23b3b; }
.ph-choice:disabled { cursor: default; }
.ph-split { display: flex; flex-wrap: wrap; align-items: center; gap: 0; font-size: 22px; font-weight: 800; margin: 8px 0; }
.ph-tile { padding: 6px 4px; background: #eef4ff; border: 1px solid #c9ddff; border-radius: 8px; margin: 0 1px; color: var(--ink); }
.ph-gap { padding: 6px 6px; color: var(--muted); cursor: pointer; user-select: none; border-radius: 8px; transition: all .12s; }
.ph-gap.on { color: #fff; background: var(--senior); }
.ph-split-preview { font-size: 15px; font-weight: 700; color: var(--ink); min-height: 22px; margin: 4px 0 8px; }
.ph-syl-blocks { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 8px 0; }
.ph-syl-block { font-size: 22px; font-weight: 800; color: var(--primary); background: #eef4ff; border: 1px solid #c9ddff; border-radius: 10px; padding: 8px 14px; }
.ph-arrow { color: var(--muted); font-weight: 800; }
.ph-spell-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.ph-spell-in { flex: 1; min-width: 180px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; font-size: 15px; outline: none; }
.ph-spell-in:focus { border-color: var(--junior); }
.ph-spell-row .check { border: none; background: var(--junior); color: #fff; border-radius: 10px; padding: 10px 18px; cursor: pointer; font-weight: 700; }
.ph-spell-row .res { font-weight: 700; }
.ph-counter { font-size: 13px; color: var(--muted); font-weight: 700; margin: 0 4px; }

/* 拼读拆解（6 步）· 第 6 步「听音拼写」：不显示单词，只给词义 */
.ph-word-quiz { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.ph-lock { font-size: 15px; font-weight: 800; color: var(--muted); background: #f1f3f7; border: 1px dashed #c9d2e0; border-radius: 8px; padding: 3px 10px; }
.ph-word-quiz .ph-zh { font-size: 18px; color: var(--ink); font-weight: 800; }
.ph-hint-btn { margin-left: 8px; font-size: 12px; padding: 3px 10px; }
.ph-hint-txt { margin-left: 6px; color: var(--ink); font-weight: 800; }
/* 拼读拆解 · 学：格子里的「例词」小标签（区别于该音本身的读法） */
.ph-a .ph-lbl { font-style: normal; font-size: 10px; color: #a9b3c2; margin-right: 3px; }

/* 课文跟读 · 逐词批改高亮 */
.tb-target { display:block; margin-top:5px; line-height:1.9; }
.tb-target .w { display:inline-block; padding:0 3px; border-radius:4px; margin:1px; }
.tb-target .w.ok { color:#1c7a4d; background:rgba(43,182,115,.14); }
.tb-target .w.miss { color:#b23b3b; background:rgba(178,59,59,.14); text-decoration:line-through; }
.tb-row .read-en { font-size:19px; font-weight:800; }

/* ---------- 同步课堂（国家平台课程视频） ---------- */
.vol-tabs { display:flex; gap:8px; flex-wrap:wrap; margin:10px 0 4px; }
.vol-tab { padding:6px 14px; border-radius:999px; background:var(--bg); border:1px solid var(--line); cursor:pointer; font-size:14px; font-weight:700; color:var(--muted); }
.vol-tab.active { background:var(--primary); color:#fff; border-color:transparent; }
.courses-note { font-size:13px; color:var(--muted); background:rgba(43,182,115,.10); border:1px solid rgba(43,182,115,.25); border-radius:10px; padding:10px 12px; margin:10px 0; line-height:1.6; }
.lesson-box { margin-top:8px; }
.lesson-row { border:1px solid var(--line); border-radius:12px; padding:12px 14px; margin-bottom:12px; background:#fff; }
.lesson-title { font-size:16px; font-weight:800; color:var(--ink); margin-bottom:8px; }
.lesson-video { width:100%; max-height:340px; border-radius:10px; background:#000; display:block; }
.lesson-dlstate { font-size:13px; color:var(--muted); margin-top:6px; }
.lesson-dlstate.ok { color:var(--junior); font-weight:700; }
.lesson-actions { margin-top:8px; }
.lesson-link { display:inline-block; padding:7px 14px; border-radius:10px; background:var(--primary); color:#fff; font-weight:700; font-size:13px; text-decoration:none; }
.lesson-link:hover { opacity:.92; }

/* ---------- 单词巧记（💡 第 5 个 Tab） ---------- */
.trick-grid { margin-top:6px; }
.trick-card { position:relative; border:1px solid var(--line); border-radius:14px; padding:14px 14px 12px; background:#fff; box-shadow:0 1px 2px rgba(31,39,51,.04); break-inside:avoid; }
.trick-card.done { background:rgba(43,182,115,.07); border-color:rgba(43,182,115,.35); }
.trick-card.mine { border-style:dashed; }
.trick-method { display:inline-block; font-size:12px; font-weight:800; color:#fff; border-radius:999px; padding:2px 10px; margin-bottom:8px; }
.trick-method.m-xie { background:#eb5757; }   /* 谐音 */
.trick-method.m-chai { background:#2f80ed; }  /* 拆分 */
.trick-method.m-dbi { background:#9b51e0; }   /* 对比 */
.trick-method.m-lian { background:#f2994a; }  /* 联想 */
.trick-method.m-story { background:#27ae60; } /* 故事 */
.trick-method.m-zi { background:#7f8c9a; }    /* 自创/其他 */
.trick-mine { position:absolute; top:12px; right:12px; font-size:11px; font-weight:800; color:#7f8c9a; background:#eef1f5; border-radius:6px; padding:1px 7px; }
.trick-head { display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-bottom:6px; }
.trick-word { font-size:18px; font-weight:800; color:var(--ink); }
.trick-zh { font-size:14px; color:var(--muted); }
.trick-grade { font-size:11px; color:#7f8c9a; background:#f1f3f7; border-radius:6px; padding:1px 7px; }
.trick-text { font-size:14px; line-height:1.65; color:var(--ink); margin:2px 0 10px; }
.trick-foot { display:flex; gap:8px; }
.trick-remember { border:1px solid var(--line); background:#fff; color:var(--ink); font-weight:700; font-size:13px; border-radius:10px; padding:6px 12px; cursor:pointer; }
.trick-remember.on { background:var(--junior); color:#fff; border-color:transparent; }
.trick-del { border:1px solid var(--line); background:#fff; color:#b23b3b; font-weight:700; font-size:13px; border-radius:10px; padding:6px 12px; cursor:pointer; }
.trick-del:hover { background:rgba(178,59,59,.08); }
.trick-add { margin-top:18px; border:1px solid var(--line); border-radius:14px; padding:14px; background:#fafbfd; }
.trick-add-row { display:flex; gap:10px; flex-wrap:wrap; margin-bottom:10px; }
.trick-add-row .ta-in { flex:1 1 160px; }
.ta-in, .ta-ta { border:1px solid var(--line); border-radius:10px; padding:9px 12px; font-size:14px; font-family:inherit; color:var(--ink); background:#fff; }
.ta-in:focus, .ta-ta:focus { outline:none; border-color:var(--primary); }
.ta-ta { width:100%; min-height:74px; resize:vertical; margin-bottom:10px; }
/* 单词练习闪卡背面的巧记提示 */
.flash-trick { margin-top:12px; padding:9px 11px; background:rgba(242,184,5,.14); border:1px solid rgba(242,184,5,.4); border-radius:10px; font-size:14px; line-height:1.6; color:var(--ink); text-align:left; }
.flash-trick::before { content:"💡 巧记 · "; font-weight:800; color:#b8860b; }

/* 巧记卡片里的图片 / 手写口诀 */
.trick-img { display:block; width:100%; max-width:240px; max-height:200px; object-fit:cover; border-radius:10px; margin:2px 0 10px; border:1px solid var(--line); }

/* 添加我的巧记 · 图片上传 */
.ta-file { padding:8px 10px; font-size:13px; }
.ta-img-prev { display:inline-flex; align-items:center; }
.ta-img-prev .trick-img { margin:0; max-width:64px; max-height:64px; }

/* 随机抽考入口条 */
.trick-quiz-bar { display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin:12px 0 4px; }
.trick-quiz-tip { font-size:13px; color:var(--muted); }
.trick-quiz-bar .check-all { background:var(--gold); color:#5a4500; border-color:transparent; }
.trick-quiz-bar .check-all:hover { opacity:.92; }

/* 随机抽考小游戏 */
.trick-quiz { max-width:560px; margin:18px auto 0; }
.trick-quiz .quiz-bar { display:flex; align-items:center; gap:14px; font-size:14px; font-weight:700; color:var(--muted); margin-bottom:12px; }
.trick-quiz .quiz-bar b { color:var(--ink); }
.trick-quiz .quiz-bar b.ok { color:var(--junior); }
.trick-quiz .quiz-bar .back { margin-left:auto; }
.quiz-flip { width:100%; max-width:480px; margin:0 auto; cursor:pointer; }
.quiz-flip .inner { min-height:200px; }
.quiz-flip .face { display:flex; flex-direction:column; align-items:center; justify-content:center; padding:26px 22px; text-align:center; }
.quiz-word { font-size:34px; font-weight:800; color:var(--ink); }
.quiz-zh { font-size:16px; color:var(--muted); margin-top:4px; }
.quiz-hint { font-size:13px; color:var(--muted); margin-top:14px; opacity:.8; }
.quiz-actions { display:flex; gap:10px; flex-wrap:wrap; justify-content:center; margin-top:16px; }
.quiz-actions .trick-remember { color:var(--junior); border-color:rgba(43,182,115,.4); }
.quiz-actions .trick-remember:hover { background:rgba(43,182,115,.1); }
.quiz-done { text-align:center; padding:30px 20px; border:1px solid var(--line); border-radius:16px; background:#fff; }
.quiz-done-emoji { font-size:54px; }
.quiz-done h2 { margin:10px 0 6px; color:var(--ink); }
.quiz-done p { color:var(--muted); font-size:15px; }
.quiz-done b.ok { color:var(--junior); }
.mode-pane.unit-tricks, .mode-pane[data-mode="tricks"] { }

/* ===== 课程学习主线（人教版为线） ===== */
.vol-section { margin: 16px 0 4px; }
.vol-title { font-weight: 800; color: var(--ink); margin: 8px 2px 2px; font-size: 15px; }

/* 学习中心 · 方法导航网格 */
.method-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin: 10px 0 6px; }
.method-card { display: flex; flex-direction: column; gap: 4px; padding: 14px; background: #fff; border: 1px solid #e6ebf2; border-radius: 14px; text-decoration: none; color: var(--ink); transition: .15s; }
.method-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(31,39,51,.08); border-color: var(--primary); }
.method-card.done { border-color: #2bb673; }
.method-card.disabled { opacity: .55; pointer-events: none; }
.m-ico { font-size: 26px; }
.m-label { font-weight: 800; }
.m-check { color: #2bb673; }
.m-desc { font-size: 12px; color: #7a8699; }

/* 学习中心 · 进度总览 */
.progress-hero { display: flex; align-items: center; gap: 22px; background: linear-gradient(120deg, #f6faff, #eef6ff); border: 1px solid #e3edfb; border-radius: 16px; padding: 16px 20px; margin: 14px 0; }
.ph-ring { --p: 0; width: 96px; height: 96px; border-radius: 50%; background: conic-gradient(var(--primary) calc(var(--p) * 1%), #e3edfb 0); display: flex; align-items: center; justify-content: center; flex: none; }
.ph-ring span { width: 74px; height: 74px; border-radius: 50%; background: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 20px; color: var(--primary); }
.ph-stats { display: flex; gap: 20px; flex-wrap: wrap; }
.ph-stat { display: flex; flex-direction: column; }
.ph-stat b { font-size: 20px; color: var(--ink); }
.ph-stat span { font-size: 12px; color: #7a8699; }

/* 单词卡「我会了 / 还不会」自评 */
.w-rate { display: flex; gap: 8px; margin-top: 8px; }
.w-known, .w-unknown { font-size: 12px; padding: 4px 10px; border-radius: 10px; border: 1px solid #e0e6ee; background: #fff; cursor: pointer; }
.w-known.on { background: #e7f7ef; border-color: #2bb673; color: #1c7a4d; }
.w-unknown.on { background: #fdecec; border-color: #e08a8a; color: #b23b3b; }