/* ===========================================================
 * style.css
 * =========================================================== */
:root {
  --bg: #0d1117;
  --bg-2: #131a24;
  --card: #161e2a;
  --card-2: #1b2432;
  --line: #26303f;
  --text: #e6edf3;
  --muted: #8b98a9;
  --primary: #38bdf8;
  --ok: #4ade80;
  --bad: #f87171;
  --warn: #fbbf24;
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #16233a 0%, var(--bg) 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  min-height: 100%;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 28px;
  background: rgba(13, 17, 23, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  font-weight: 800; font-size: 20px; color: #04121f;
}
.brand-text { font-size: 18px; font-weight: 700; letter-spacing: .5px; line-height: 1.1; }
.brand-text em { display: block; font-size: 11px; font-style: normal; color: var(--muted); font-weight: 400; }

.tabs { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.tab {
  border: 0; background: transparent; color: var(--muted);
  padding: 9px 16px; border-radius: 10px; cursor: pointer;
  font-size: 14px; font-weight: 600; transition: .18s;
}
.tab:hover { color: var(--text); background: var(--card); }
.tab.active { color: #04121f; background: linear-gradient(135deg, var(--primary), #22d3ee); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 22px 20px 60px; }
.view { display: none; animation: fade .25s ease; }
.view.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }

/* ---------- 通用面板 ---------- */
.panel, .lesson-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 16px;
}
.panel h3 { margin: 0 0 14px; font-size: 15px; font-weight: 700; }
.panel-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.panel-head h2 { margin: 0; font-size: 17px; font-weight: 700; }
.panel-head h2 .tag {
  font-size: 11px; font-weight: 500; color: var(--primary);
  background: rgba(56, 189, 248, .12); border: 1px solid rgba(56, 189, 248, .3);
  padding: 3px 8px; border-radius: 20px; margin-left: 8px; vertical-align: 2px;
}
.lesson-pager { margin-left: auto; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.btn {
  border: 1px solid var(--line); background: var(--card-2); color: var(--text);
  padding: 8px 14px; border-radius: 10px; cursor: pointer; font-size: 13px;
  font-weight: 600; transition: .16s; font-family: inherit;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: linear-gradient(135deg, var(--primary), #0ea5e9); color: #04121f; border: 0; }
.btn.primary:hover { filter: brightness(1.08); color: #04121f; }
.btn.ghost { background: transparent; }

.select {
  background: var(--card-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 10px; font-size: 13px; font-family: inherit; cursor: pointer;
}
.select.wide { min-width: 220px; }
.chk { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); cursor: pointer; }
.chk input { accent-color: var(--primary); }
.muted { color: var(--muted); font-size: 12px; }
.row-end { display: flex; justify-content: flex-end; align-items: center; gap: 10px; margin-top: 10px; }

/* ---------- 关卡卡片 ---------- */
.lesson-cards { display: flex; gap: 8px; overflow-x: auto; padding: 12px 2px 4px; }
.lesson-cards::-webkit-scrollbar { height: 6px; }
.lesson-cards::-webkit-scrollbar-thumb { background: var(--line); border-radius: 6px; }
.lcard {
  flex: 0 0 auto; min-width: 96px; text-align: left;
  background: var(--card-2); border: 1px solid var(--line); border-radius: 12px;
  padding: 8px 10px; cursor: pointer; color: var(--muted); transition: .16s; font-family: inherit;
}
.lcard:hover { border-color: var(--primary); color: var(--text); }
.lcard.active { background: rgba(56, 189, 248, .14); border-color: var(--primary); color: var(--text); }
.lcard.done { border-color: rgba(74, 222, 128, .5); }
.lcard .lno { font-size: 11px; opacity: .8; }
.lcard .lname { font-size: 13px; font-weight: 700; margin-top: 2px; white-space: nowrap; }
.lcard .lbest { font-size: 11px; color: var(--ok); margin-top: 4px; }

.lesson-desc {
  border-top: 1px dashed var(--line); margin-top: 8px; padding-top: 10px;
  font-size: 13px; color: var(--muted); line-height: 1.7;
}
.lesson-desc b { color: var(--primary); }
.km { display: inline-block; background: var(--card-2); border: 1px solid var(--line);
  border-radius: 6px; padding: 1px 7px; margin: 0 3px; font-family: var(--mono); color: var(--text); }

/* ---------- 统计条 ---------- */
.stat-bar {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 12px 18px; margin-bottom: 14px;
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat .k { font-size: 11px; color: var(--muted); }
.stat .v { font-size: 20px; font-weight: 700; font-family: var(--mono); }
.stat .v i { font-size: 11px; font-style: normal; color: var(--muted); font-weight: 500; }
.stat.grow { flex: 1; min-width: 120px; }
.bar { height: 8px; background: var(--card-2); border-radius: 8px; overflow: hidden; border: 1px solid var(--line); }
.bar i { display: block; height: 100%; width: 0; border-radius: 8px;
  background: linear-gradient(90deg, var(--primary), var(--ok)); transition: width .2s; }

/* ---------- 打字区 ---------- */
.typing-box {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; margin-bottom: 10px;
  font-family: var(--mono); font-size: 22px; line-height: 1.9;
  max-height: 190px; overflow-y: auto; cursor: text;
  letter-spacing: .5px; word-break: break-word; outline: none;
  position: relative;
}
.typing-box:focus { border-color: rgba(56, 189, 248, .5); }
.typing-box::-webkit-scrollbar { width: 8px; }
.typing-box::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }
.typing-box.dim { opacity: .45; }

.ch { color: var(--muted); transition: color .05s; position: relative; }
.ch.correct { color: var(--text); }
.ch.wrong { color: var(--bad); background: rgba(248, 113, 113, .18); border-radius: 3px; }
.ch.space.wrong { background: rgba(248, 113, 113, .35); }
.ch.current::before {
  content: ''; position: absolute; left: -2px; top: 4px; bottom: 4px; width: 2px;
  background: var(--primary); animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.tip { color: var(--muted); font-size: 12px; margin: 0 0 16px; }

/* ---------- 键盘 ---------- */
.kb-wrap { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px 18px; }
.kb-hint { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.kb-hint b { color: var(--primary); font-family: var(--mono); }
.keyboard { display: flex; flex-direction: column; gap: 6px; user-select: none; }
.kb-row { display: flex; gap: 6px; }
.kb-key {
  flex: 1 1 0; height: 44px; border-radius: 8px;
  background: var(--card-2); border: 1px solid var(--line);
  display: grid; place-items: center; font-size: 12px; font-family: var(--mono);
  color: var(--muted); transition: .12s; min-width: 0; position: relative;
}
.kb-key .cap { pointer-events: none; }
.kb-key[data-finger]::after {
  content: ''; position: absolute; inset: auto 6px 4px; height: 3px; border-radius: 3px;
  background: currentColor; opacity: .0; transition: .15s;
}
.kb-key.finger-active::after { opacity: .85; }
.kb-key.dim { opacity: .28; }
.kb-key.next {
  background: var(--primary); color: #04121f; border-color: var(--primary);
  font-weight: 700; transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(56, 189, 248, .35);
}
.kb-key.next::after { opacity: 0; }
.kb-key.hit-ok { background: var(--ok); color: #04121f; }
.kb-key.hit-bad { background: var(--bad); color: #2b0b0b; }

[data-finger="l-pinky"]  { color: #f472b6; }
[data-finger="l-ring"]   { color: #fb923c; }
[data-finger="l-middle"] { color: #facc15; }
[data-finger="l-index"]  { color: #4ade80; }
[data-finger="thumb"]    { color: #94a3b8; }
[data-finger="r-index"]  { color: #38bdf8; }
[data-finger="r-middle"] { color: #818cf8; }
[data-finger="r-ring"]   { color: #c084fc; }
[data-finger="r-pinky"]  { color: #fca5a5; }
.kb-key.next { color: #04121f; }

.legend { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 12px; font-size: 12px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

/* ---------- 结果卡 ---------- */
.result-card {
  margin-top: 16px; background: linear-gradient(135deg, rgba(56,189,248,.1), rgba(74,222,128,.08));
  border: 1px solid rgba(56, 189, 248, .35); border-radius: var(--radius); padding: 18px 20px;
}
.result-card h3 { margin: 0 0 14px; font-size: 16px; }
.res-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 12px; }
.res-item { background: rgba(0, 0, 0, .22); border-radius: 12px; padding: 12px; text-align: center; }
.res-item .rk { font-size: 11px; color: var(--muted); }
.res-item .rv { font-size: 24px; font-weight: 800; font-family: var(--mono); margin-top: 4px; }
.res-item .rv.good { color: var(--ok); }
.res-item .rv.warn { color: var(--warn); }
.res-item .rv.bad { color: var(--bad); }
.res-note { margin-top: 12px; font-size: 13px; color: var(--muted); line-height: 1.8; }
.res-note .kb { display: inline-block; font-family: var(--mono); background: rgba(248,113,113,.16);
  color: var(--bad); border-radius: 6px; padding: 1px 7px; margin: 0 3px; }
.res-actions { margin-top: 14px; display: flex; gap: 10px; }

/* ---------- 自定义文本 ---------- */
.custom-box { margin-top: 12px; }
.custom-box textarea, .dict-input {
  width: 100%; background: var(--bg-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; font-size: 14px; font-family: var(--mono); resize: vertical;
  outline: none;
}
.custom-box textarea:focus, .dict-input:focus { border-color: var(--primary); }

/* ---------- 默写 ---------- */
.dict-stage { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; }
.dict-progress { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--muted); }
.dict-progress .bar { flex: 1; }
.dict-card { text-align: center; padding: 26px 10px 18px; }
.dict-zh { font-size: 30px; font-weight: 700; letter-spacing: 1px; }
.dict-slots { margin: 14px 0 16px; font-family: var(--mono); font-size: 22px; letter-spacing: 4px; color: var(--muted); }
.dict-slots .fill { color: var(--primary); }
.dict-input { max-width: 420px; margin: 0 auto; text-align: center; font-size: 20px; letter-spacing: 1px; }
.dict-input.ok { border-color: var(--ok); background: rgba(74, 222, 128, .08); }
.dict-input.bad { border-color: var(--bad); background: rgba(248, 113, 113, .08); }
.dict-feedback { min-height: 26px; margin-top: 12px; font-size: 14px; font-weight: 600; }
.dict-feedback.ok { color: var(--ok); }
.dict-feedback.bad { color: var(--bad); }

/* ---------- 单词练习 ---------- */
.word-card { text-align: center; padding: 22px 10px 12px; }
.word-target {
  font-family: var(--mono); font-size: 44px; font-weight: 700;
  letter-spacing: 3px; line-height: 1.4; word-break: break-all;
}
.word-target span { color: var(--muted); transition: .06s; border-radius: 4px; padding: 0 1px; }
.word-target span.ok { color: var(--ok); }
.word-target span.bad { color: var(--bad); background: rgba(248, 113, 113, .18); }
.word-target span.cur { background: rgba(56, 189, 248, .22); box-shadow: inset 0 -3px 0 var(--primary); }
.word-target .masked { color: var(--line); letter-spacing: 6px; }
.word-zh { font-size: 16px; color: var(--muted); margin-bottom: 16px; min-height: 22px; }

/* ---------- 词库管理 ---------- */
.bank-layout { display: grid; grid-template-columns: 250px 1fr; gap: 16px; align-items: start; }
.bank-side {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 12px 16px; position: sticky; top: 76px;
}
.side-title {
  font-size: 12px; color: var(--muted); font-weight: 700; letter-spacing: .5px;
  margin: 12px 4px 6px; padding-bottom: 6px; border-bottom: 1px dashed var(--line);
}
.side-title:first-child { margin-top: 0; }
.bank-list { display: flex; flex-direction: column; gap: 6px; }
.bank-item {
  background: var(--card-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 10px; cursor: pointer; transition: .15s; position: relative;
}
.bank-item:hover { border-color: var(--primary); }
.bank-item.active { background: rgba(56, 189, 248, .14); border-color: var(--primary); }
.bi-name { font-size: 13px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-right: 18px; }
.bi-meta { font-size: 11px; color: var(--muted); margin-top: 2px; }
.bi-del {
  position: absolute; right: 6px; top: 6px; border: 0; background: transparent;
  color: var(--muted); cursor: pointer; font-size: 13px; line-height: 1; padding: 2px;
}
.bi-del:hover { color: var(--bad); }
.bank-empty { font-size: 12px; color: var(--muted); padding: 8px 6px; line-height: 1.6; }

.bank-main { min-width: 0; }
.bank-editor {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px;
}
.row-line { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.text-input {
  background: var(--bg-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 9px 12px; font-size: 14px; font-family: inherit;
  outline: none; min-width: 200px;
}
.text-input:focus { border-color: var(--primary); }
.text-input:disabled, .bank-text:disabled { opacity: .6; cursor: not-allowed; }

.bank-text {
  width: 100%; min-height: 240px; resize: vertical;
  background: var(--bg-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; font-family: var(--mono); font-size: 14px;
  line-height: 1.8; outline: none;
}
.bank-text:focus { border-color: var(--primary); }

.bank-status { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--muted); margin-top: 10px; }
.bank-status b { color: var(--text); font-family: var(--mono); }
.bank-status .warn b, .bank-status .warn { color: var(--warn); }
.bank-status .bad b, .bank-status .bad { color: var(--bad); }

.bank-errors { margin-top: 8px; font-size: 12px; }
.err-title { color: var(--warn); margin-bottom: 4px; }
.err-line { color: var(--muted); padding: 2px 0; }
.err-line code { font-family: var(--mono); color: var(--bad); background: rgba(248,113,113,.1);
  border-radius: 4px; padding: 1px 5px; }

.bank-tools { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line);
  display: flex; flex-direction: column; gap: 10px; }
.tool-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tool-label { font-size: 11px; color: var(--muted); width: 34px; flex: 0 0 34px; font-weight: 700; }
.bank-preview { display: flex; gap: 6px; flex-wrap: wrap; }
.wp { background: var(--card-2); border: 1px solid var(--line); border-radius: 8px;
  padding: 3px 9px; font-size: 12px; }
.wp b { margin-right: 6px; font-family: var(--mono); }

.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translate(-50%, 12px);
  background: var(--primary); color: #04121f; font-weight: 700; font-size: 13px;
  padding: 10px 20px; border-radius: 20px; opacity: 0; transition: .28s; z-index: 99;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .35);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty-icon { font-size: 42px; }
.empty-state p { margin: 8px 0; }

/* ---------- 章节选择 ---------- */
.chapter-block { border-top: 1px dashed var(--line); margin-top: 10px; padding-top: 10px; }
.cb-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  font-size: 13px; font-weight: 600; margin-bottom: 8px; flex-wrap: wrap;
}
.cb-actions { display: flex; gap: 6px; }
.btn.tiny { padding: 4px 10px; font-size: 12px; border-radius: 8px; }
.chapter-row {
  display: flex; gap: 6px; flex-wrap: wrap;
  max-height: 108px; overflow-y: auto; padding-bottom: 4px;
}
.chapter-row::-webkit-scrollbar { width: 6px; }
.chapter-row::-webkit-scrollbar-thumb { background: var(--line); border-radius: 6px; }
.chip {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 5px;
  background: var(--card-2); border: 1px solid var(--line); border-radius: 20px;
  padding: 5px 12px; font-size: 12px; color: var(--muted); cursor: pointer;
  font-family: inherit; transition: .15s;
}
.chip:hover { border-color: var(--primary); color: var(--text); }
.chip.on { background: rgba(56, 189, 248, .16); border-color: var(--primary); color: var(--text); font-weight: 700; }
.chip em { font-style: normal; font-size: 11px; opacity: .75; font-family: var(--mono); }

/* ---------- 设置页 ---------- */
.set-list { display: flex; flex-direction: column; gap: 4px; }
.set-row { display: flex; align-items: center; gap: 16px; padding: 12px 4px; border-bottom: 1px dashed var(--line); flex-wrap: wrap; }
.set-row:last-child { border-bottom: 0; }
.set-text { flex: 1; min-width: 220px; }
.set-title { font-size: 14px; font-weight: 700; }
.set-tag {
  font-size: 11px; font-weight: 500; color: var(--primary); margin-left: 8px;
  background: rgba(56, 189, 248, .12); border: 1px solid rgba(56, 189, 248, .3);
  padding: 2px 7px; border-radius: 20px; vertical-align: 2px;
}
.set-desc { font-size: 12px; color: var(--muted); margin-top: 4px; line-height: 1.7; }
.set-desc code { font-family: var(--mono); background: var(--card-2); border-radius: 4px; padding: 1px 5px; color: var(--primary); }
.set-actions { display: flex; gap: 8px; }
.btn.danger { border-color: rgba(248, 113, 113, .5); color: var(--bad); }
.btn.danger:hover { background: rgba(248, 113, 113, .12); border-color: var(--bad); }

.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.switch input { display: none; }
.switch i {
  width: 44px; height: 24px; border-radius: 24px; background: var(--card-2);
  border: 1px solid var(--line); position: relative; transition: .18s; flex: 0 0 44px;
}
.switch i::after {
  content: ''; position: absolute; left: 3px; top: 2px; width: 18px; height: 18px;
  border-radius: 50%; background: var(--muted); transition: .18s;
}
.switch.on i { background: rgba(56, 189, 248, .28); border-color: var(--primary); }
.switch.on i::after { left: 22px; background: var(--primary); }
.switch-label { font-size: 12px; color: var(--muted); width: 14px; }
.switch.on .switch-label { color: var(--primary); }

.about-box { display: flex; flex-direction: column; gap: 10px; }
.about-ver { font-size: 20px; font-weight: 800; font-family: var(--mono); color: var(--primary); }
.log-list { display: flex; flex-direction: column; gap: 2px; margin-top: 4px; }
.log-item { display: flex; gap: 12px; font-size: 12px; padding: 5px 0; border-bottom: 1px dashed var(--line); align-items: baseline; flex-wrap: wrap; }
.log-v { font-family: var(--mono); font-weight: 700; color: var(--primary); flex: 0 0 62px; }
.log-d { color: var(--muted); flex: 0 0 84px; font-family: var(--mono); }
.log-t { color: var(--text); }

/* ---------- 页脚 ---------- */
.foot-line { font-size: 13px; font-weight: 600; }
.foot-ver { font-family: var(--mono); color: var(--primary); }

/* ---------- 统计页 ---------- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.kpi .kk { font-size: 12px; color: var(--muted); }
.kpi .kv { font-size: 26px; font-weight: 800; font-family: var(--mono); margin-top: 4px; }
.kpi .ks { font-size: 11px; color: var(--muted); margin-top: 4px; }

.chart { display: flex; align-items: flex-end; gap: 6px; height: 150px; padding-top: 10px; }
.chart .col { flex: 1; background: linear-gradient(180deg, var(--primary), rgba(56,189,248,.25));
  border-radius: 6px 6px 0 0; min-height: 3px; position: relative; }
.chart .col span { position: absolute; top: -18px; left: 0; right: 0; text-align: center;
  font-size: 10px; color: var(--muted); }
.chart .col:hover { filter: brightness(1.25); }

.err-list, .wrong-list { display: flex; flex-wrap: wrap; gap: 8px; }
.err-item { background: rgba(248, 113, 113, .12); border: 1px solid rgba(248, 113, 113, .3);
  border-radius: 10px; padding: 6px 12px; font-family: var(--mono); font-size: 13px; }
.err-item b { color: var(--bad); }
.wrong-item { background: var(--card-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 12px; font-size: 13px; display: flex; gap: 10px; align-items: center; }
.wrong-item .en { font-weight: 700; }
.wrong-item .n { font-size: 11px; color: var(--bad); }
.wrong-item .del { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 14px; }
.wrong-item .del:hover { color: var(--bad); }

.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 0 20px 30px; }

@media (max-width: 720px) {
  .topbar { padding: 10px 14px; gap: 10px; }
  .brand-text em { display: none; }
  .tab { padding: 8px 10px; font-size: 13px; }
  .typing-box { font-size: 18px; padding: 16px; }
  .kb-key { height: 34px; font-size: 10px; }
  .lesson-pager { width: 100%; margin-left: 0; }
  .bank-layout { grid-template-columns: 1fr; }
  .bank-side { position: static; }
}

/* ---------- 全局：确保 hidden 属性生效 ----------
 * 类选择器（如 .auth-mask { display: flex }）优先级高于浏览器默认的
 * [hidden] { display: none }，会导致 element.hidden = true 之后元素依然显示。
 * 这条规则强制 hidden 属性在任何情况下都生效。 */
[hidden] { display: none !important; }

/* ---------- 同步徽标 & 登录 ---------- */
.sync-badge {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 20px; padding: 4px 12px;
  font-size: 12px; color: var(--muted); background: var(--card-2);
  margin-left: 8px; white-space: nowrap; transition: .15s; user-select: none;
}
.sync-badge:hover { border-color: var(--primary); color: var(--text); }
.sync-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex: 0 0 7px; }
.sync-badge.on { color: var(--primary); border-color: rgba(56,189,248,.45); background: rgba(56,189,248,.10); }
.sync-badge.on .dot { background: var(--primary); box-shadow: 0 0 0 3px rgba(56,189,248,.18); }
.sync-badge.bad { color: var(--bad); border-color: rgba(248,113,113,.45); background: rgba(248,113,113,.10); }
.sync-badge.bad .dot { background: var(--bad); }
.sync-badge .uname { max-width: 120px; overflow: hidden; text-overflow: ellipsis; }

.auth-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.62); z-index: 120;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  backdrop-filter: blur(2px);
}
.auth-card {
  width: 100%; max-width: 380px; background: var(--card);
  border: 1px solid var(--line); border-radius: 16px; padding: 22px;
  box-shadow: 0 18px 50px rgba(0,0,0,.5);
}
.auth-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.auth-head h3 { margin: 0; font-size: 17px; }
.auth-close {
  border: 0; background: transparent; color: var(--muted); cursor: pointer;
  font-size: 16px; line-height: 1; padding: 4px;
}
.auth-close:hover { color: var(--text); }
.auth-label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.auth-err { min-height: 18px; font-size: 12px; color: var(--bad); margin-top: 8px; }
.auth-actions { display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; }
.auth-actions .btn { flex: 1 1 auto; }

@media (max-width: 720px) {
  .sync-badge { margin-left: 0; }
}

/* ---------- 单词音标 + 朗读 ---------- */
.word-ph {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin: 6px 0 2px; min-height: 22px;
}
.word-ph[hidden] { display: none !important; }
.ph-text {
  font-family: var(--mono); font-size: 14px; color: var(--primary);
  letter-spacing: .5px; user-select: none;
}
.ph-speak {
  border: 1px solid var(--line); background: var(--card-2); color: var(--text);
  border-radius: 8px; padding: 2px 9px; font-size: 14px; line-height: 1.5;
  cursor: pointer; transition: .15s;
}
.ph-speak:hover { border-color: var(--primary); color: var(--primary); background: rgba(56,189,248,.10); }
.ph-speak:active { transform: scale(.94); }

/* 词库预览中的音标 */
.wp-ph {
  font-style: normal; font-family: var(--mono); font-size: 11px;
  color: var(--primary); margin: 0 5px; opacity: .9;
}

/* 设置页下拉选择 */
.set-select {
  background: var(--card-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 10px; font-size: 13px; max-width: 240px; cursor: pointer;
}
.set-select:focus { outline: none; border-color: var(--primary); }

/* ---------------- 登录门（未登录时全屏遮挡，数据全程存服务器） ---------------- */
.auth-gate {
  position: fixed; inset: 0; z-index: 900;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at 50% 0%, #16263a 0%, var(--bg) 60%);
  padding: 20px; overflow: auto;
}
[hidden] { display: none !important; }
.auth-card {
  width: 100%; max-width: 380px; background: var(--panel);
  border: 1px solid var(--line); border-radius: 14px;
  padding: 26px 24px 22px; box-shadow: 0 18px 50px rgba(0,0,0,.45);
}
.auth-brand {
  font-size: 20px; font-weight: 700; letter-spacing: .5px; text-align: center;
  margin-bottom: 18px; color: var(--text);
}
.auth-brand span {
  display: block; font-size: 12px; font-weight: 400; color: var(--muted);
  letter-spacing: 2px; margin-top: 4px;
}
.auth-tabs { display: flex; gap: 6px; background: var(--bg); padding: 4px; border-radius: 10px; }
.auth-tab {
  flex: 1; padding: 8px 0; border: 0; border-radius: 8px; cursor: pointer;
  background: transparent; color: var(--muted); font-size: 13px; font-weight: 600;
}
.auth-tab.active { background: var(--panel); color: var(--primary); box-shadow: 0 1px 4px rgba(0,0,0,.3); }
.auth-sub { font-size: 12px; color: var(--muted); line-height: 1.7; margin: 12px 0 16px; text-align: center; }
.auth-label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.pwd-wrap { position: relative; }
.pwd-wrap .text-input { padding-right: 42px; }
.pwd-eye {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  border: 0; background: transparent; cursor: pointer; font-size: 14px;
  padding: 4px 6px; border-radius: 6px; opacity: .6;
}
.pwd-eye:hover { opacity: 1; background: rgba(255,255,255,.06); }
.auth-strong { margin-top: 8px; }
.strong-bar { height: 4px; border-radius: 3px; background: var(--line); overflow: hidden; }
.strong-bar i { display: block; height: 100%; width: 0; transition: width .2s, background .2s; border-radius: 3px; }
.strong-txt { font-size: 11px; color: var(--muted); display: block; margin-top: 4px; }
.auth-err {
  min-height: 18px; font-size: 12px; color: var(--bad);
  margin: 10px 0 4px; line-height: 1.6; word-break: break-word;
}
.auth-remember {
  display: flex; align-items: center; gap: 7px; font-size: 12px;
  color: var(--muted); margin: 10px 0 14px; cursor: pointer; user-select: none;
}
.auth-remember input { accent-color: var(--primary); }
.btn.block { width: 100%; padding: 11px 0; font-size: 14px; font-weight: 600; }
.btn.small { padding: 6px 12px; font-size: 12px; }
.auth-foot { font-size: 11px; color: var(--muted); text-align: center; margin-top: 12px; line-height: 1.7; }

/* ---------------- 用户菜单 ---------------- */
/* 菜单的锚点：必须是 position:relative，否则 absolute 会跑到文档原点去 */
.user-wrap { position: relative; display: inline-flex; align-items: center; }
.user-menu {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 500; width: 220px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px; box-shadow: 0 12px 30px rgba(0,0,0,.45);
}
/* 展开态：显式 display，优先级高于任何隐藏规则 */
.user-menu.open { display: block !important; }
.um-head { font-size: 13px; margin-bottom: 8px; }
.um-head .muted { display: block; font-size: 11px; margin-top: 2px; }
.um-row { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.um-actions { display: flex; gap: 6px; }
.um-actions .btn { flex: 1; }
.um-link {
  display: block; width: 100%; margin-top: 8px; padding: 6px 0; border: 0;
  background: transparent; color: var(--muted); font-size: 11px; cursor: pointer;
}
.um-link:hover { color: var(--bad); }

/* ---------------- 多词性释义：换行显示 ----------------
 * 同一个单词的多个词性释义合并后用 \n 连接，
 * 这些容器需要保留换行，否则会挤成一行。 */
.word-zh, .dict-zh, .dict-feedback, .kb, .wp, .res-note {
  white-space: pre-line;
}

/* 移动端软键盘接收器：必须真实存在且可聚焦，才能唤起 iPad 软键盘；
 * 视觉上完全不可见，但不能 display:none（那样无法聚焦）。 */
.tap-sink {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: 0; border: 0;
  opacity: 0;
  pointer-events: none;
  left: 0; top: 0;
  font-size: 16px;   /* 小于 16px 时 iOS 聚焦会自动放大页面 */
}


/* ===========================================================
 * 首页（功能介绍）
 * =========================================================== */
.home-hero {
  text-align: center;
  padding: 36px 20px 8px;
}
.home-title {
  margin: 0 0 10px;
  font-size: 30px;
  letter-spacing: .5px;
}
.home-sub {
  margin: 0 auto 20px;
  max-width: 620px;
  color: var(--muted, #8b95a1);
  line-height: 1.7;
}
.home-cta {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.home-h2 {
  margin: 28px 0 14px;
  font-size: 17px;
}
.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 14px;
}
.home-card {
  background: var(--card, #fff);
  border: 1px solid var(--line, #e5e9ef);
  border-radius: 12px;
  padding: 16px 18px;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}
.home-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .07);
  border-color: var(--primary, #3b82f6);
}
.home-card:active { transform: translateY(0); }
.hc-icon { font-size: 22px; margin-bottom: 6px; }
.hc-title { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.hc-desc { margin: 0; font-size: 13px; line-height: 1.65; color: var(--muted, #8b95a1); }
.hc-desc code {
  background: var(--bg2, #f3f5f8);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12px;
}
.hc-tag {
  margin-top: 10px;
  font-size: 12px;
  color: var(--primary, #3b82f6);
}
.home-tips { padding-bottom: 10px; }
.home-tips ul {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  line-height: 2;
  color: var(--muted, #8b95a1);
}
.home-tips b { color: var(--fg, #1f2937); }

/* ===========================================================
 * 页脚：版权 / ICP 备案 / 公安联网备案
 * =========================================================== */
.foot .copyright {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted, #8b95a1);
}
/* 备案行：公安徽章 + 公安备案号 + ICP 备案号，同一行居中显示。
 * 顺序按监管惯例 —— 公安在前、ICP 在后。 */
.foot .beian-row {
  margin-top: 6px;
  display: flex;
  flex-wrap: nowrap;          /* 强制单行：备案号换行会显得不正式 */
  /* 用 center 而不是 baseline：
   * .police 是 inline-flex 容器，其基线取自第一个 flex item（即图标的底边），
   * 而 .icp 的基线是文字基线 —— 两者天然不同，用 baseline 反而差 3px。
   * 统一 line-height 后用 center，两个盒子高度一致，文字自然齐平。 */
  align-items: center;
  justify-content: center;
  gap: 0 10px;
  white-space: nowrap;        /* 备案号内部也不允许断行 */
  font-size: 12px;
  line-height: 20px;          /* 固定行高，让图标与文字的高度可预期 */
  color: var(--muted, #8b95a1);
}
/* 所有直接子项显式清零 margin。
 * 踩过的坑：早期「上下堆叠」时代给 .icp 留了 margin-top:6px，改横排后
 * 旧规则没删，与横排规则属性合并后继续生效。flex 居中时 margin 计入
 * 外边距盒，把 ICP 整体下推 3px，两个备案号出现高低差。 */
.foot .beian-row > * {
  margin: 0;
}
.foot .beian-row a {
  color: inherit;
  text-decoration: none;
}
.foot .beian-row a:hover {
  text-decoration: underline;
  color: var(--primary, #38bdf8);
}
.foot .police {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.foot .police-icon {
  width: 16px;
  height: 16px;
  /* inline-block + middle：display:block 会让图标独占块级盒，
   * 在 baseline 对齐下反而破坏文字基线 */
  display: inline-block;
  vertical-align: middle;
}
.foot .icp {
  display: inline-flex;
  align-items: center;
}
/* 分隔点用真实元素而不是伪元素：伪元素 ::before 会被 flex 的 gap
 * 再算一次间距，两者叠起来是 28px，窄屏上更容易挤到第二行。 */
.foot .beian-dot {
  color: var(--line, #26303f);
  user-select: none;
}
/* 窄屏兜底：放不下时缩小字号 + 收紧间距，而不是换行。
 * 备案号挤到第二行会显得很不正式。 */
@media (max-width: 480px) {
  .foot .beian-row {
    font-size: 11px;
    gap: 4px 8px;
  }
  .foot .police-icon {
    width: 14px;
    height: 14px;
  }
}

/* ===========================================================
 * 修改密码弹窗
 * =========================================================== */
.pw-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
}
.pw-mask[hidden] { display: none !important; }
.pw-box {
  background: var(--card, #fff);
  border-radius: 12px;
  padding: 22px 24px;
  width: 340px;
  max-width: calc(100vw - 32px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .22);
}
.pw-box h3 { margin: 0 0 14px; font-size: 16px; }
.pw-field { margin-bottom: 12px; }
.pw-field label {
  display: block;
  font-size: 12px;
  color: var(--muted, #8b95a1);
  margin-bottom: 5px;
}
.pw-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 9px 11px;
  border: 1px solid var(--line, #e5e9ef);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.pw-field input:focus {
  outline: none;
  border-color: var(--primary, #3b82f6);
}
.pw-strength {
  height: 4px;
  border-radius: 3px;
  background: var(--line, #e5e9ef);
  margin-top: 7px;
  overflow: hidden;
}
.pw-strength i { display: block; height: 100%; width: 0; transition: width .18s ease, background .18s ease; }
.pw-hint { font-size: 12px; color: var(--muted, #8b95a1); margin-top: 5px; min-height: 16px; }
.pw-err { font-size: 12px; color: #dc2626; margin-top: 8px; min-height: 16px; }
.pw-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 14px; }

/* 首页未登录提示条 */
.home-guest {
  margin: 14px auto 0;
  padding: 8px 14px;
  display: inline-block;
  font-size: 13px;
  color: var(--warn, #fbbf24);
  background: rgba(251, 191, 36, .1);
  border: 1px solid rgba(251, 191, 36, .28);
  border-radius: 8px;
}
.home-guest[hidden] { display: none !important; }
.home-guest a {
  color: var(--primary, #38bdf8);
  text-decoration: none;
  font-weight: 600;
}
.home-guest a:hover { text-decoration: underline; }

/* 更新日志「展开更早的版本」按钮 */
.log-more {
  margin-top: 8px;
  align-self: flex-start;
  padding: 5px 12px;
  font-size: 12px;
  font-family: inherit;
  color: var(--primary, #38bdf8);
  background: transparent;
  border: 1px solid var(--line, #26303f);
  border-radius: 999px;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.log-more:hover {
  background: rgba(56, 189, 248, .1);
  border-color: var(--primary, #38bdf8);
}

/* ===========================================================
 * 后台（仅管理员）
 * =========================================================== */
.admin-table-wrap {
  overflow-x: auto;
  margin-top: 10px;
  border: 1px solid var(--line, #26303f);
  border-radius: 8px;
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.admin-table th,
.admin-table td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--line, #26303f);
  white-space: nowrap;
}
.admin-table th {
  background: rgba(56, 189, 248, .08);
  color: var(--primary, #38bdf8);
  font-weight: 600;
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: rgba(255, 255, 255, .03); }

/* 访问量柱状图 */
.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 150px;
  padding: 10px 0 0;
}
.bar-col {
  flex: 1 1 0;
  min-width: 4px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
}
.bar-fill {
  background: linear-gradient(180deg, var(--primary, #38bdf8), rgba(99, 102, 241, .5));
  border-radius: 2px 2px 0 0;
  min-height: 2px;
}
.bar-x {
  font-size: 9px;
  color: var(--muted, #8b95a1);
  text-align: center;
  margin-top: 3px;
  writing-mode: vertical-rl;
  height: 42px;
  overflow: hidden;
}
/* 天数多时横向密集，允许窄条 */
.bar-chart { overflow-x: auto; }

/* 访客画像 */
.admin-profile {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.prof-block {
  background: rgba(255, 255, 255, .02);
  border: 1px solid var(--line, #26303f);
  border-radius: 8px;
  padding: 12px 14px;
}
.prof-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary, #38bdf8);
}
.prof-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  margin-bottom: 5px;
}
.prof-name {
  flex: 0 0 88px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted, #8b95a1);
}
.prof-bar {
  flex: 1 1 auto;
  height: 6px;
  background: rgba(255, 255, 255, .06);
  border-radius: 3px;
  overflow: hidden;
}
.prof-bar i {
  display: block;
  height: 100%;
  background: var(--primary, #38bdf8);
  border-radius: 3px;
}
.prof-n {
  flex: 0 0 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* 窄屏下画像单列，避免挤成一条 */
@media (max-width: 640px) {
  .admin-profile { grid-template-columns: 1fr; }
  .prof-name { flex: 0 0 68px; }
}