/* ============ WordWise · 全局样式 ============ */
:root{
  --bg:#f5f6fa; --card:#ffffff; --ink:#1c2130; --sub:#697089;
  --pri:#4f46e5; --pri-dk:#3730a3; --pri-soft:#eef0fe;
  --ok:#16a34a; --warn:#d97706; --err:#dc2626;
  --line:#e6e8f0; --shadow:0 10px 30px rgba(28,33,48,.07);
  --r:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  font-family:"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  background:var(--bg);color:var(--ink);min-height:100vh;display:flex;flex-direction:column;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:15px}
.ic{flex-shrink:0;display:inline-block;vertical-align:-3px}

/* ---------- 顶栏 ---------- */
.topbar{
  background:linear-gradient(135deg,#312e81 0%,#4f46e5 52%,#6d28d9 100%);
  color:#fff;padding:14px 26px;display:flex;align-items:center;gap:26px;flex-wrap:wrap;
  box-shadow:0 6px 24px rgba(49,46,129,.28);
}
.brand{display:flex;align-items:center;gap:12px;cursor:pointer}
.logo-tile{
  width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:center;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.22);
}
.brand h1{font-size:18px;letter-spacing:.5px;font-weight:700}
.brand small{opacity:.72;font-size:11.5px;letter-spacing:.4px}
.mainnav{
  display:flex;gap:2px;margin-left:auto;flex-wrap:wrap;
  background:rgba(255,255,255,.10);border-radius:14px;padding:4px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.12);
}
.nav-btn{
  color:rgba(255,255,255,.88);padding:7px 13px;border-radius:10px;font-size:13.5px;
  transition:.18s;white-space:nowrap;display:inline-flex;align-items:center;gap:7px;
}
.nav-btn:hover{background:rgba(255,255,255,.14);color:#fff}
.nav-btn.active{background:#fff;color:var(--pri-dk);font-weight:600;box-shadow:0 2px 10px rgba(0,0,0,.18)}

/* ---------- 布局 ---------- */
.container{width:min(1080px,96vw);margin:24px auto;flex:1}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:22px;margin-bottom:18px}
.page-title{font-size:21px;margin-bottom:4px}
.page-sub{color:var(--sub);font-size:13.5px;margin-bottom:16px}
.grid{display:grid;gap:14px}
.cols-2{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.cols-3{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}

/* ---------- 首页：教材选择 ---------- */
.stage-tabs{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.stage-tab{
  padding:9px 22px;border-radius:999px;border:2px solid var(--line);background:#fff;
  font-size:15px;color:var(--sub);transition:.2s;font-weight:bold;
}
.stage-tab:hover{border-color:var(--pri);color:var(--pri)}
.stage-tab.active{background:linear-gradient(120deg,var(--pri),#7c4dff);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(79,107,255,.35)}
.grade-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.row-lab{font-size:12.5px;color:var(--sub);font-weight:600;min-width:34px;letter-spacing:2px}
.grade-chip,.vol-chip{
  padding:7px 16px;border-radius:10px;background:#fff;border:2px solid var(--line);
  font-size:14px;color:var(--ink);transition:.2s;
}
.grade-chip:hover,.vol-chip:hover{border-color:var(--pri)}
.grade-chip.active{background:var(--pri);color:#fff;border-color:var(--pri)}
.vol-chip.active{background:#efeaff;color:#7c4dff;border-color:#7c4dff;font-weight:bold}

.unit-card{
  border:2px solid var(--line);border-radius:var(--r);padding:16px 18px;background:#fff;
  cursor:pointer;transition:.2s;position:relative;
}
.unit-card:hover{transform:translateY(-3px);border-color:var(--pri);box-shadow:var(--shadow)}
.unit-card h3{font-size:16px;margin-bottom:4px}
.unit-card p{color:var(--sub);font-size:13px}
.unit-meta{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.tag{font-size:11.5px;background:var(--pri-soft);color:var(--pri-dk);padding:3px 10px;border-radius:999px;font-weight:500}
.done-badge{
  position:absolute;top:12px;right:14px;font-size:11px;color:var(--ok);
  background:#ecfdf3;border:1px solid #bbe7cb;padding:2px 9px;border-radius:999px;font-weight:600;
}

/* ---------- 功能入口卡 ---------- */
.feature-card{
  background:linear-gradient(170deg,#ffffff,#fafbff);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 16px;cursor:pointer;transition:.2s;text-align:center;
  box-shadow:0 2px 8px rgba(28,33,48,.04);
}
.feature-card:hover{transform:translateY(-3px);border-color:#c7cdf5;box-shadow:var(--shadow)}
.ic-tile{
  width:46px;height:46px;border-radius:13px;margin:0 auto 10px;
  background:linear-gradient(135deg,var(--pri-soft),#f5effe);color:var(--pri);
  display:flex;align-items:center;justify-content:center;
}
.feature-card h4{font-size:15px;margin-bottom:5px;font-weight:600}
.feature-card p{font-size:12px;color:var(--sub)}

/* ---------- 单词学习卡 ---------- */
.word-card{text-align:center;padding:36px 24px}
.word-en{font-size:46px;font-weight:800;letter-spacing:1px;color:var(--pri-dk)}
.word-ipa{color:var(--sub);font-size:17px;margin:8px 0 4px}
.word-zh{font-size:20px;margin-bottom:14px}
.word-sent{background:#f6f8ff;border-radius:12px;padding:12px 16px;margin-top:14px;font-size:15px;line-height:1.7}
.word-sent .zh{color:var(--sub);font-size:13px}
.phrase-list{display:flex;flex-direction:column;gap:6px;margin-top:12px;text-align:left}
.phrase-item{display:flex;justify-content:space-between;gap:12px;background:#fafbff;border:1px dashed var(--line);border-radius:10px;padding:8px 12px;font-size:14px}
.speak-big{
  width:56px;height:56px;border-radius:50%;background:var(--pri);
  color:#fff;box-shadow:0 6px 16px rgba(79,70,229,.35);transition:.18s;margin:10px auto 4px;display:flex;align-items:center;justify-content:center;
}
.speak-big:hover{transform:scale(1.07);background:#4338ca}
.speak-small{
  display:inline-flex;align-items:center;gap:5px;
  background:var(--pri-soft);color:var(--pri-dk);border-radius:8px;padding:5px 10px;font-size:12.5px;font-weight:600;transition:.15s;
}
.speak-small:hover{background:#e0e5fd}
.rate-tag{font-weight:700;font-size:11px;letter-spacing:.3px}
.progress-wrap{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin:14px 0}
.progress-bar{height:100%;background:linear-gradient(90deg,var(--ok),#7ce0b0);border-radius:99px;transition:width .4s}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  background:var(--pri);color:#fff;border-radius:11px;
  padding:10px 22px;font-size:14.5px;font-weight:600;transition:.18s;
  box-shadow:0 4px 12px rgba(79,70,229,.28);
}
.btn:hover{background:#4338ca;transform:translateY(-1px)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn.ghost{background:#fff;color:var(--pri);border:1.5px solid #c7cdf5;box-shadow:none}
.btn.ghost:hover{border-color:var(--pri);background:var(--pri-soft)}
.btn.gray{background:#eef0f5;color:var(--sub);box-shadow:none}
.btn.gray:hover{background:#e3e6ee}
.row-center{display:flex;justify-content:center;gap:12px;margin-top:20px;flex-wrap:wrap}

/* ---------- 拼写练习 ---------- */
.spell-hint{display:flex;gap:14px;align-items:center;justify-content:center;margin:18px 0;flex-wrap:wrap}
.spell-input{
  width:min(420px,90%);text-align:center;font-size:26px;letter-spacing:3px;
  border:2.5px solid var(--line);border-radius:14px;padding:12px;outline:none;transition:.2s;
}
.spell-input:focus{border-color:var(--pri)}
.spell-input.ok{border-color:var(--ok);background:#effaf4;animation:pulse .4s}
.spell-input.err{border-color:var(--err);animation:shake .4s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}
@keyframes pulse{50%{transform:scale(1.04)}}
.answer-box{min-height:30px;margin-top:14px;font-size:16px;font-weight:bold}
.answer-box.ok{color:var(--ok)}.answer-box.err{color:var(--err)}

/* ---------- 选择题 / 听力 ---------- */
.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:640px;margin:20px auto 0}
.choice-btn{
  border:1.5px solid var(--line);border-radius:14px;padding:16px;font-size:19px;background:#fff;transition:.15s;font-weight:500;
}
.choice-btn:hover:not(:disabled){border-color:var(--pri);transform:translateY(-2px);color:var(--pri-dk)}
.choice-btn.right{border-color:var(--ok);background:#ecfdf3;color:var(--ok);font-weight:600}
.choice-btn.wrong{border-color:var(--err);background:#fef2f2;color:var(--err)}
.big-ear{
  width:72px;height:72px;border-radius:50%;background:var(--pri-soft);color:var(--pri);
  display:inline-flex;align-items:center;justify-content:center;transition:.18s;margin:14px auto 6px;
}
.big-ear:hover{transform:scale(1.08);background:#e0e5fd}

/* ---------- 导入区 ---------- */
.imp-btns{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0 4px}
.bank-chip{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:11px;
  border:1.5px solid var(--line);background:#fff;font-size:13.5px;cursor:pointer;transition:.18s;
}
.bank-chip:hover{border-color:#c7cdf5}
.bank-chip.active{border-color:var(--pri);background:var(--pri-soft);color:var(--pri-dk);font-weight:600}
.bank-chip .del{color:var(--sub);display:inline-flex;padding:2px;border-radius:6px}
.bank-chip .del:hover{color:var(--err);background:#fee2e2}
details.paste-wrap{margin-top:12px}
details.paste-wrap summary{cursor:pointer;font-size:13px;color:var(--sub);user-select:none}
details.paste-wrap summary:hover{color:var(--pri)}
details.paste-wrap[open] summary{margin-bottom:10px}

/* ---------- 发音评测 ---------- */
.target-text{font-size:24px;font-weight:700;text-align:center;line-height:1.6}
.target-zh{text-align:center;color:var(--sub);margin-top:6px;font-size:14px}
.mic-btn{
  width:86px;height:86px;border-radius:50%;font-size:36px;color:#fff;
  background:radial-gradient(circle at 30% 30%,#ff7d7d,#ef4444);
  box-shadow:0 8px 22px rgba(239,68,68,.4);transition:.25s;margin:22px auto 8px;display:block;
}
.mic-btn:hover{transform:scale(1.07)}
.mic-btn.rec{animation:micPulse 1.1s infinite}
@keyframes micPulse{0%{box-shadow:0 0 0 0 rgba(239,68,68,.5)}70%{box-shadow:0 0 0 22px rgba(239,68,68,0)}100%{box-shadow:0 0 0 0 rgba(239,68,68,0)}}
.heard-text{text-align:center;color:var(--sub);min-height:26px;font-style:italic;margin-top:6px}
.score-ring{
  width:110px;height:110px;border-radius:50%;margin:16px auto;display:flex;flex-direction:column;
  align-items:center;justify-content:center;font-weight:800;font-size:30px;color:#fff;
  transition:.3s;
}
.score-ring small{font-size:12px;font-weight:normal;opacity:.9}
.score-4{background:conic-gradient(#22b573 var(--p),#e5e9f4 0)}.score-4>div{width:88px;height:88px;border-radius:50%;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#111}
.score-tip{text-align:center;color:var(--sub);font-size:13.5px;margin-top:8px}

/* ---------- 对话 ---------- */
.dlg-line{
  display:flex;gap:12px;margin-bottom:12px;align-items:flex-start;
}
.dlg-line.me{flex-direction:row-reverse}
.bubble{
  max-width:72%;background:#f1f4ff;border-radius:14px;padding:10px 14px;font-size:15px;line-height:1.65;
  position:relative;
}
.me .bubble{background:#e7f9f0}
.bubble .who{font-size:11.5px;color:var(--sub);margin-bottom:2px;display:flex;gap:8px;align-items:center}
.bubble .zh{color:var(--sub);font-size:12.5px;margin-top:3px}
.avatar{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:19px;background:#dde4ff;flex-shrink:0}
.me .avatar{background:#bdeeda}

/* ---------- 错词本 / 统计 ---------- */
.wrong-item{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:11px 4px;gap:10px}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin-bottom:6px}
.stat-card{background:linear-gradient(150deg,#fff,#f6f8ff);border:2px solid var(--line);border-radius:var(--r);padding:18px;text-align:center}
.stat-num{font-size:30px;font-weight:800;color:var(--pri-dk)}
.stat-lab{color:var(--sub);font-size:13px;margin-top:4px}

/* ---------- 综合学习卡：打字挑战 / 打字机效果 ---------- */
.mini-spell{display:flex;gap:10px;justify-content:center;align-items:center;margin-top:20px;flex-wrap:wrap}
.spell-input.small{width:min(260px,80%);font-size:19px;padding:9px;letter-spacing:2px}
.caret::after{content:"▌";color:var(--pri);margin-left:1px;animation:blink .8s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
code{background:#eef1f8;border-radius:6px;padding:2px 7px;font-size:12.5px;font-family:Consolas,"Courier New",monospace;color:#47418f}
.answer-box b{letter-spacing:1px}

/* ---------- 实时判色打字 ---------- */
.live-word{display:flex;gap:6px;justify-content:center;align-items:flex-end;flex-wrap:wrap;margin:18px auto 8px;max-width:680px;min-height:60px;cursor:text}
.live-word.main{margin:10px auto 4px;min-height:66px}
.live-word.main .lt{font-size:38px;min-width:48px;height:64px}
.lt{
  font-size:32px;font-weight:800;min-width:42px;height:56px;padding:0 8px;
  display:inline-flex;align-items:center;justify-content:center;border-radius:10px;
  background:#f3f5fb;color:#b9c0d4;border-bottom:4px solid #e2e7f2;
  transition:transform .12s,background .12s,color .12s,border-color .12s;
  font-family:Consolas,"Courier New",monospace;user-select:none;
}
.lt.ok{color:var(--ok);background:#eafaf2;border-bottom-color:#22b573;transform:translateY(-3px)}
.lt.cur{border-bottom-color:var(--pri);color:#8a93b8;box-shadow:0 4px 0 -1px rgba(79,107,255,.30)}
.lt.bad{color:#fff;background:#ef4444;border-bottom-color:#b91c1c;animation:shake .3s}
.lt.sp{min-width:16px;padding:0}
.live-input{position:absolute;left:-9999px;top:0;width:10px;height:10px;opacity:0}
.mini-sel{border:1.5px solid var(--line);border-radius:8px;padding:3px 8px;font-size:12.5px;background:#fff;color:var(--ink);outline:none;cursor:pointer}
.mini-sel:hover{border-color:var(--pri)}
.mini-inp{border:1.5px solid var(--line);border-radius:8px;padding:6px 10px;font-size:13px;background:#fff;color:var(--ink);outline:none}
.mini-inp:focus{border-color:var(--pri)}
.mic-banner{
  display:flex;align-items:center;gap:8px;justify-content:center;flex-wrap:wrap;
  background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:12px;
  padding:10px 14px;font-size:13px;margin-top:12px;
}
.self-practice{text-align:center;padding:8px 0}
.modal-mask{
  position:fixed;inset:0;background:rgba(28,33,48,.45);backdrop-filter:blur(2px);
  display:flex;align-items:center;justify-content:center;z-index:100;padding:16px;
}
.modal{
  width:min(540px,94vw);background:#fff;border-radius:16px;padding:24px 26px;
  box-shadow:0 24px 64px rgba(0,0,0,.28);animation:pulse .25s;
}
.help-steps{margin:0 0 8px 18px;display:flex;flex-direction:column;gap:9px;font-size:13.5px;line-height:1.7;color:var(--ink)}

/* ---------- 其他 ---------- */
.empty-tip{text-align:center;color:var(--sub);padding:40px 10px;font-size:15px}
textarea.import-box{width:100%;height:170px;border:2px solid var(--line);border-radius:12px;padding:12px;outline:none;resize:vertical;font-size:13px}
textarea.import-box:focus{border-color:var(--pri)}
.toast{
  position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(80px);
  background:rgba(31,37,64,.92);color:#fff;padding:11px 22px;border-radius:999px;font-size:14px;
  opacity:0;transition:.35s;z-index:99;pointer-events:none;max-width:86vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.footer{text-align:center;color:var(--sub);font-size:12.5px;padding:18px 10px 26px}
.crumb{font-size:13.5px;color:var(--sub);margin-bottom:14px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.crumb b{color:var(--pri-dk)}
.link-btn{color:var(--pri);cursor:pointer;font-size:13.5px}
.link-btn:hover{text-decoration:underline}

@media (max-width:720px){
  .topbar{padding:12px 14px;gap:10px}
  .mainnav{margin-left:0;width:100%}
  .word-en{font-size:36px}
  .choice-grid{grid-template-columns:1fr}
}