/* ===== 意大利语自学站 ===== */
:root{
  --bg:#f5f5f8;
  --card:#ffffff;
  --ink:#171720;
  --ink2:#3d3d4d;
  --muted:#73738a;
  --line:#e7e7ef;
  --green:#0a7a48;
  --green-l:#e8f5ee;
  --red:#c8102e;
  --red-l:#fdecef;
  --blue:#1c5fa8;
  --shadow:0 1px 2px rgba(20,20,40,.04),0 8px 24px rgba(20,20,40,.06);
  --r:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
button,input,select,textarea{font-family:inherit}
button,summary,a,label{-webkit-tap-highlight-color:transparent}
button{touch-action:manipulation}      /* 去掉移动端点击的 300ms 延迟 */
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font:16px/1.65 "PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{
  max-width:1000px;margin:0 auto;
  padding-left:max(18px,env(safe-area-inset-left));
  padding-right:max(18px,env(safe-area-inset-right));
  padding-bottom:calc(70px + env(safe-area-inset-bottom));
}
b,strong{font-weight:600}
kbd{
  font:13px/1 ui-monospace,Consolas,monospace;background:#f0f0f6;border:1px solid var(--line);
  border-bottom-width:2px;border-radius:5px;padding:2px 5px;color:var(--ink2)
}
small{color:var(--muted);font-size:13px}

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)
}
.topbar-inner{
  max-width:1000px;margin:0 auto;padding:10px max(18px,env(safe-area-inset-right)) 10px max(18px,env(safe-area-inset-left));
  display:flex;align-items:center;gap:16px;flex-wrap:wrap
}
.brand{display:flex;align-items:center;gap:10px;min-width:190px}
.brand strong{display:block;letter-spacing:.2px}
.brand-sub{font-size:12px;color:var(--muted)}
.flag{display:inline-flex;height:22px;width:34px;border:1px solid #dcdce6;border-radius:4px;overflow:hidden}
.flag i{flex:1}
.flag i:nth-child(1){background:#008c45}
.flag i:nth-child(2){background:#f4f5f0}
.flag i:nth-child(3){background:#cd212a}
.lesson-nav{display:flex;gap:6px;flex:1;flex-wrap:wrap}
.lesson-nav a,.lesson-nav button{
  border:1px solid var(--line);background:#fff;color:var(--ink2);
  border-radius:999px;padding:5px 13px;font-size:13px;cursor:pointer;
  text-decoration:none;display:inline-block
}
.lesson-nav a.active,.lesson-nav button.active{background:var(--green);border-color:var(--green);color:#fff}
.lesson-nav button.soon{color:#a5a5b5;cursor:not-allowed;background:#fbfbfd}
.topbar-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.rate{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}
.rate input{width:92px;accent-color:var(--green)}
.btn-ghost{
  border:1px solid var(--line);background:#fff;color:var(--ink2);
  border-radius:8px;padding:5px 11px;font-size:12.5px;cursor:pointer
}
.btn-ghost:hover{border-color:#c9c9d8}
.btn-mini{
  border:1px solid var(--green);background:var(--green-l);color:var(--green);
  border-radius:7px;padding:3px 10px;font-size:12.5px;cursor:pointer
}
.progress-line{height:3px;background:#eeeef4}
.progress-line i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green),#3aa06b);transition:width .35s}

/* ---------- Hero ---------- */
.hero{
  margin:22px 0;background:linear-gradient(135deg,#0a7a48 0%,#12855a 55%,#1c6f8f 100%);
  color:#fff;border-radius:18px;padding:26px 26px 22px;box-shadow:var(--shadow)
}
.hero .lvl{font-size:12.5px;letter-spacing:1.4px;opacity:.85;text-transform:uppercase}
.hero h1{margin:6px 0 4px;font-size:32px;letter-spacing:.3px}
.hero .sub{opacity:.92;font-size:16px}
.hero .tag{margin-top:12px;font-size:14px;background:rgba(255,255,255,.16);display:inline-block;padding:5px 12px;border-radius:999px}
.hero .meta{margin-top:12px;font-size:13px;opacity:.85}
.voice-ok{opacity:.88}
.voice-bad{color:#ffd8de;background:rgba(0,0,0,.18);padding:3px 9px;border-radius:999px}
.onread{background:#fff6c9;border-radius:4px;box-shadow:0 0 0 3px #fff6c9}
.tag-mini{font-size:12px;color:var(--muted);background:#f2f2f8;border-radius:6px;padding:2px 7px}

/* ---------- Card ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:20px 22px;margin:18px 0}
.card h2{margin:0 0 4px;font-size:19px;display:flex;align-items:center;gap:10px}
.card h2 .num{font:600 12px/1 ui-monospace,monospace;color:#fff;background:var(--green);padding:5px 7px;border-radius:6px}
.card h2 em{font-style:italic;color:var(--muted);font-size:15px;font-weight:400}
.card h3.sub{margin:24px 0 10px;font-size:16px;display:flex;align-items:baseline;gap:8px}
.lead{margin:2px 0 14px;color:var(--muted);font-size:14px}

/* ---------- 目标 ---------- */
.goals{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.goals li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink2)}
.goals li::before{content:"";position:absolute;left:6px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--green);opacity:.75}

/* ---------- 对话 ---------- */
.dialog{border:1px solid var(--line);border-radius:12px;padding:14px;margin:12px 0;background:#fcfcfe}
.dialog h4{margin:0 0 2px;font-size:15px}
.dialog .scene{font-size:12.5px;color:var(--muted);margin-bottom:12px}
.line{display:flex;gap:10px;margin:8px 0;align-items:flex-start}
.line.even{flex-direction:row-reverse}
.bubble{max-width:76%;border:1px solid var(--line);border-radius:12px;padding:8px 12px;background:#fff}
.line.even .bubble{background:var(--green-l);border-color:#d6ecdf}
.who{font-size:11.5px;color:var(--muted);margin-bottom:2px}
.it{font-size:16px;font-weight:600;color:var(--ink);letter-spacing:.2px}
.zh{font-size:13px;color:var(--muted)}
.row-tools{display:flex;gap:6px;align-items:center;margin-top:6px}
.spk{
  border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer;
  padding:2px 8px;font-size:13px;line-height:1.6
}
.spk:hover{border-color:var(--green);color:var(--green)}
.spk.playing{border-color:var(--green);background:var(--green-l)}

/* ---------- 短句 ---------- */
/* 栅格统一用 min() 兜底：窄屏时自动降到 1 列，不会横向溢出 */
.phrase-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(260px,100%),1fr));gap:8px}
.phrase{border:1px solid var(--line);border-radius:10px;padding:8px 11px;display:flex;gap:8px;align-items:center;background:#fcfcfe}
.phrase .txt{flex:1;min-width:0}
.phrase .txt b{display:block;font-size:15px}
.phrase .txt span{font-size:12.5px;color:var(--muted)}

/* ---------- 重音符元音 ---------- */
.acc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:11px}
.acc-card{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fcfcfe}
.acc-card:hover{border-color:#cfcfdd}
.acc-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.acc-ch{font-size:34px;line-height:1;font-weight:600;color:var(--green)}
.acc-ipa{font:14px/1 ui-monospace,Consolas,monospace;background:#f0f0f6;border:1px solid var(--line);border-radius:6px;padding:4px 8px;color:var(--ink2)}
.kind{font-size:12.5px;border-radius:999px;padding:3px 10px}
.kind.open{background:var(--red-l);color:var(--red)}
.kind.close{background:#eaf2fb;color:var(--blue)}
.kind.plain{background:#f0f0f6;color:var(--muted)}
.acc-tip{font-size:13.5px;color:var(--ink2);margin:8px 0 9px}
.acc-rules{margin-top:14px;border-left:3px solid #f0d8a8;padding:2px 0 2px 14px}
.acc-rules h4{margin:0 0 6px;font-size:14.5px}
.acc-rules ol{margin:0;padding-left:20px}
.acc-rules li{font-size:13.5px;color:var(--ink2);margin:5px 0}

/* ---------- 发音 ---------- */
.pron{border-left:3px solid var(--green);padding:2px 0 2px 12px;margin:14px 0}
.pron .rule{font-weight:600;font-size:15px}
.pron .note{font-size:13.5px;color:var(--ink2);margin:3px 0 6px}
.ex-row{display:flex;gap:8px;flex-wrap:wrap}
.ex-chip{border:1px solid var(--line);border-radius:8px;padding:3px 10px;background:#fff;font-size:14px;display:flex;gap:8px;align-items:center}
.ex-chip i{font-style:normal;color:var(--muted);font-size:12.5px}

/* ---------- 字母表 ---------- */
.alpha-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(118px,100%),1fr));gap:8px}
.alpha{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:#fcfcfe}
.alpha b{font-size:17px;letter-spacing:.5px}
.alpha .nm{font-size:12.5px;color:var(--green);font-style:italic}
.alpha .wd{font-size:13.5px;margin-top:2px}
.alpha .wd i{font-style:normal;color:var(--muted);font-size:12px}
.foreign{display:flex;gap:8px;flex-wrap:wrap}
.foreign .alpha{min-width:150px}

/* ---------- 语法表 ---------- */
.gblock{margin:14px 0}
.gblock h4{margin:0 0 6px;font-size:15px}
.tbl{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl td{border-bottom:1px solid var(--line);padding:7px 10px;vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{font-weight:600;color:var(--green);white-space:nowrap;width:38%}
.tbl td:first-child .spk{margin-right:7px;vertical-align:1px}
.gblock h4{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.gblock h4 .btn-mini{font-weight:400}
.gnote{font-size:13.5px;color:var(--muted);margin-top:8px;border-left:3px solid #f0d8a8;padding-left:10px}

/* ---------- 词汇卡 ---------- */
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(150px,100%),1fr));gap:9px}
.vc{border:1px solid var(--line);border-radius:11px;background:#fff;padding:12px;min-height:86px;cursor:pointer;transition:.18s;position:relative}
@media (hover:hover){.vc:hover{border-color:var(--green);transform:translateY(-2px)}}
.vc .it{font-size:16px}
.vc .zh{font-size:13px;color:var(--muted);margin-top:4px}
.vc .hint{position:absolute;right:8px;bottom:6px;font-size:11px;color:#c2c2d0}
.vc.flipped{background:var(--green-l);border-color:#cfe8da}
.vc .back{display:none}
.vc.flipped .front{display:none}
.vc.flipped .back{display:block}

/* ---------- 键盘 ---------- */
.kb{background:#fbfbfe;border:1px solid var(--line);border-radius:12px;padding:14px;overflow-x:auto}
.kb-row{display:flex;gap:5px;margin-bottom:5px}
.key{
  min-width:44px;height:46px;border:1px solid #dedee8;border-radius:7px;background:#fff;
  display:flex;flex-direction:column;justify-content:center;align-items:center;position:relative;
  font-size:15px;color:var(--ink2);box-shadow:0 1px 0 #dddde6
}
.key .sh{position:absolute;top:2px;left:5px;font-size:11px;color:#9b9bb0}
.key.acc{background:var(--green-l);border-color:#a8dcc0;color:var(--green);font-weight:600}
.how-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr));gap:12px;margin-top:4px}
.how{border:1px solid var(--line);border-radius:12px;padding:13px 15px;background:#fcfcfe}
.how h4{margin:2px 0 8px;font-size:15px}
.how p{margin:6px 0;font-size:13.5px;color:var(--ink2)}
.how-n{font:600 11.5px/1 ui-monospace,monospace;background:var(--green-l);color:var(--green);padding:4px 8px;border-radius:6px}
.how-ol{margin:6px 0;padding-left:20px}
.how-ol li{font-size:13.5px;color:var(--ink2);margin:4px 0}
.how-tip{color:var(--muted)!important}
.how-warn{color:var(--red)!important;background:var(--red-l);border-radius:7px;padding:6px 9px!important}
code{font:13px/1 ui-monospace,Consolas,monospace;background:#f0f0f6;border:1px solid var(--line);border-radius:5px;padding:3px 6px;letter-spacing:1px}
.tbl thead th{text-align:left;font-size:12.5px;font-weight:600;color:var(--muted);padding:6px 10px;border-bottom:1px solid var(--line)}
.kb-notes{display:grid;grid-template-columns:1.1fr 1fr;gap:18px;margin-top:16px}
.kb-hint{display:none}          /* 只在窄屏提示键盘图可横滑 */
.kb-notes h4{margin:0 0 6px;font-size:14.5px}
.tips{margin:0;padding-left:18px;font-size:13.5px;color:var(--ink2)}
.tips li{margin:3px 0}

/* ---------- 练习 ---------- */
.ex{border:1px solid var(--line);border-radius:12px;padding:13px 14px;margin:11px 0;background:#fcfcfe}
.ex .stem{font-size:14.5px;margin:0 0 10px;color:var(--ink2)}
.ex-head{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.ex-idx{font:600 12px/1 monospace;color:#fff;background:#b9b9cb;padding:5px 7px;border-radius:6px}
.ex.ok .ex-idx{background:var(--green)}
.ex.bad .ex-idx{background:var(--red)}
.opts{display:grid;gap:7px}
.opt{
  display:flex;gap:9px;align-items:flex-start;
  text-align:left;border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 12px;
  cursor:pointer;font-size:14.5px;font-family:inherit;color:var(--ink2)
}
.opt:hover{border-color:#bdbdd0}
.opt.sel{border-color:var(--blue);background:#f2f7fd}
.opt.right{border-color:var(--green);background:var(--green-l);color:var(--green)}
.opt.wrong{border-color:var(--red);background:var(--red-l);color:var(--red)}
.opt-key{
  flex:none;width:20px;height:20px;margin-top:1px;border-radius:5px;
  background:#eeeef5;color:#6d6d86;font:600 11.5px/20px ui-monospace,monospace;text-align:center
}
.opt.right .opt-key{background:var(--green);color:#fff}
.opt.wrong .opt-key{background:var(--red);color:#fff}
.opt-t{flex:1;min-width:0}

/* ---------- 逐项解析 ---------- */
.why-box{
  margin-top:9px;padding:10px 12px;border-radius:0 10px 10px 0;
  border-left:3px solid #d9d9e6;background:#fafafd
}
.why-box[hidden]{display:none}
.why-title{font-size:12.5px;color:var(--muted);letter-spacing:.02em;margin-bottom:7px}
.why-title em{font-style:normal;opacity:.7}
.why-list{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.why-list li{display:flex;gap:8px;font-size:13.5px;line-height:1.6;color:var(--ink2)}
.why-key{
  flex:none;width:18px;height:18px;margin-top:2px;border-radius:5px;
  background:#e8e8f0;color:#6d6d86;font:600 11px/18px ui-monospace,monospace;text-align:center
}
.why-list li.w-ok .why-key{background:var(--green);color:#fff}
.why-list li.w-no .why-key{background:var(--red-l);color:var(--red)}
.why-body{flex:1;min-width:0}
.why-body b{margin-right:5px;color:var(--ink)}
.why-list li.w-ok .why-body b{color:var(--green)}
.why-list li.w-no .why-body b{color:var(--red)}
/* 选中但答错的那一项，在面板里也标出来，方便对照 */
.why-list li.w-pick{background:var(--red-l);border-radius:7px;padding:3px 8px;margin:-3px -8px}
.w-tag{
  flex:none;margin-right:5px;font-size:10.5px;line-height:1;padding:2px 5px;border-radius:4px;
  background:var(--red);color:#fff;vertical-align:1px
}
.fill-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:17px;color:var(--ink)}
.fill-row input{
  font:600 16px/1 inherit;color:var(--green);border:0;border-bottom:2px solid var(--green);
  background:transparent;text-align:center;padding:2px 4px;outline:none
}
.fill-row input[readonly]{border-bottom-color:var(--line)}
.order-bank,.order-answer{display:flex;gap:6px;flex-wrap:wrap;min-height:40px;padding:7px;border-radius:9px}
.order-bank{background:#f4f4f9;border:1px dashed #d5d5e2}
.order-answer{background:#fff;border:1px solid var(--line);margin-top:7px}
.wchip{border:1px solid var(--line);background:#fff;border-radius:8px;padding:4px 11px;font-size:14.5px;cursor:pointer;font-family:inherit}
.wchip:hover{border-color:var(--green);color:var(--green)}
.typing-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.typing-row input{
  flex:1;min-width:220px;font:16px/1.4 inherit;padding:8px 11px;border:1px solid var(--line);
  border-radius:9px;outline:none;background:#fff
}
.typing-row input:focus{border-color:var(--green)}
.acc-btns{display:flex;gap:5px}
.acc-btns button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:3px 9px;cursor:pointer;font-size:15px}
.acc-btns button:hover{border-color:var(--green);color:var(--green)}
.fb{margin-top:9px;font-size:13.5px;color:var(--muted);display:none}
.fb.show{display:block}
.fb.good{color:var(--green)}
.fb.bad{color:var(--red)}
.ex-btns{display:flex;gap:8px;margin-top:9px}
.btn-sm{border:1px solid var(--line);background:#fff;border-radius:8px;padding:4px 12px;font-size:13px;cursor:pointer;color:var(--ink2)}
.btn-sm.pri{background:var(--green);border-color:var(--green);color:#fff}
.score-bar{display:flex;align-items:center;gap:12px;margin-top:16px;font-size:14px;color:var(--muted)}

/* ---------- 小结 ---------- */
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.checklist label{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;cursor:pointer;color:var(--ink2)}
.checklist input{margin-top:4px;width:16px;height:16px;accent-color:var(--green)}
.checklist label.done{color:#a5a5b5;text-decoration:line-through}
.next-up{margin-top:16px;border:1px dashed #c9c9dd;border-radius:11px;padding:12px 14px;background:#fbfbfd}
.next-up h4{margin:0 0 6px;font-size:14px}
.next-up ol{margin:0;padding-left:20px;font-size:13.5px;color:var(--ink2)}
.foot{margin:26px 0 0;font-size:12.5px;color:#9a9aae;text-align:center;line-height:1.7}
.foot p{margin:0 0 6px}
.foot-audio{font-size:13px;color:var(--green)}
.foot-how{max-width:560px;margin:12px auto 0;text-align:left;background:#fff;border:1px solid var(--line);border-radius:11px;padding:0 14px}
.foot-how summary{cursor:pointer;padding:11px 0;font-size:13.5px;color:var(--ink2);list-style:none}
.foot-how summary::-webkit-details-marker{display:none}
.foot-how summary::before{content:"▸ ";color:var(--green)}
.foot-how[open] summary::before{content:"▾ "}
.foot-how ol{margin:0 0 12px;padding-left:20px;color:var(--ink2)}
.foot-how li{margin:5px 0}
.foot-tip{color:var(--red)}

/* ---------- 环境提示条（微信 / 本地文件） ---------- */
.env-tip{
  background:#7a3b00;color:#fff;font-size:13.5px;line-height:1.6;
  padding:10px max(18px,env(safe-area-inset-right)) 10px max(18px,env(safe-area-inset-left));
  padding-top:calc(10px + env(safe-area-inset-top));
}
.env-tip b{color:#ffd9a0}

/* ---------- 语音自检报告 ---------- */
.audio-diag{
  background:#fff5f5;border-bottom:1px solid #f0c6c6;color:#8a2b2b;
  font-size:12.5px;line-height:1.75;padding:10px 18px
}
.diag-head{font-weight:700;margin-bottom:4px}
.diag-head .btn-mini{margin-left:6px}
.diag-body{-webkit-user-select:text;user-select:text;word-break:break-all}
.build{color:#b4b4c4;margin-left:8px;font-size:12px}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(26px + env(safe-area-inset-bottom));transform:translate(-50%,20px);
  opacity:0;pointer-events:none;max-width:88vw;text-align:center;
  background:#1e1e2b;color:#fff;font-size:13.5px;padding:9px 16px;border-radius:9px;transition:.25s;z-index:99
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ============================================================
   手机 / 平板
   ============================================================ */
@media (max-width:720px){
  .wrap{
    padding-left:max(12px,env(safe-area-inset-left));
    padding-right:max(12px,env(safe-area-inset-right));
    padding-bottom:calc(56px + env(safe-area-inset-bottom));
  }

  /* --- 顶栏：品牌一行，课程导航横滑一行 --- */
  .topbar-inner{gap:8px;padding:8px max(12px,env(safe-area-inset-right)) 8px max(12px,env(safe-area-inset-left))}
  .brand{min-width:0;flex:1 1 auto}
  .brand strong{font-size:14px}
  .brand-sub{font-size:11px}
  .flag{height:19px;width:29px}
  .lesson-nav{
    order:3;flex:0 0 100%;flex-wrap:nowrap;overflow-x:auto;gap:5px;
    padding-bottom:3px;-webkit-overflow-scrolling:touch;scrollbar-width:none
  }
  .lesson-nav::-webkit-scrollbar{display:none}
  .lesson-nav a,.lesson-nav button{flex:0 0 auto;padding:6px 12px}
  .topbar-tools{margin-left:0;gap:8px}
  .rate input{width:64px}
  .btn-ghost{min-height:34px}

  /* --- 内容 --- */
  .hero{margin:14px 0;padding:20px 18px 18px;border-radius:14px}
  .hero h1{font-size:24px;line-height:1.25}
  .hero .sub{font-size:14.5px}
  .card{padding:16px 14px;border-radius:12px;margin:14px 0}
  .card h2{font-size:17px;flex-wrap:wrap;gap:8px}
  .card h2 em{font-size:13.5px}
  .card h3.sub{font-size:15px;flex-wrap:wrap;margin:20px 0 10px}
  .lead{font-size:13.5px}
  .kb-notes{grid-template-columns:1fr;gap:14px}
  .kb-notes>div{overflow-x:auto}
  .bubble{max-width:90%;padding:8px 11px}
  .it{font-size:15.5px}

  /* --- 手势目标：都撑到 36px 以上，手指点得准 --- */
  .spk{min-height:36px;padding:6px 12px;font-size:14px}
  .btn-sm{min-height:38px;padding:7px 14px;font-size:13.5px}
  .btn-mini{min-height:32px;padding:5px 11px}
  .opt{min-height:44px;padding:11px 13px;font-size:15px;gap:8px}
  .why-box{padding:9px 11px;margin-top:8px}
  .why-list li{font-size:14px;line-height:1.62}
  .wchip{min-height:38px;padding:8px 13px;font-size:15px}
  .acc-btns{gap:6px;flex-wrap:wrap}
  .acc-btns button{min-width:42px;min-height:42px;font-size:17px;padding:0}
  .fill-row input{min-width:64px}
  .fill-row{gap:6px;font-size:16px}
  .typing-row input{min-width:0;flex:1 1 100%}
  .checklist input{width:20px;height:20px;margin-top:2px}
  .checklist label{font-size:14px}

  /* --- 键盘图：小屏横滑，按键缩小但要能看清 --- */
  .kb{padding:10px 8px}
  .key{min-width:34px;height:40px;font-size:13px;border-radius:6px}
  .key .sh{font-size:10px;left:4px;top:1px}
  .acc-ch{font-size:29px}
  .acc-card{padding:11px 12px}

  /* --- 表格：窄屏横滑，别把列挤变形 --- */
  .tbl{font-size:13.5px}
  .tbl td,.tbl thead th{padding:7px 8px}
  .tbl td:first-child{width:auto}
  .tbl thead th{white-space:normal}
  /* 四列对照表：短列不换行、长列（布局位置）换行，
     这样一屏能看完，不用横滑，也不会把「字符」挤成竖排 */
  .tbl-acc th:first-child,.tbl-acc td:first-child,
  .tbl-acc th:nth-child(2),.tbl-acc td:nth-child(2){white-space:nowrap}
  .kb-hint{display:block;font-size:12px;color:var(--muted);margin:0 0 6px}
  .ex{padding:12px}
  .score-bar{flex-wrap:wrap;gap:8px}
  .toast{font-size:13px;padding:9px 13px}
}

/* 超窄屏（iPhone SE 一类，320–380px）再收一档 */
@media (max-width:380px){
  .hero h1{font-size:21px}
  .card{padding:14px 11px}
  .alpha-grid{grid-template-columns:repeat(auto-fill,minmax(min(104px,100%),1fr))}
  .vocab-grid{grid-template-columns:repeat(auto-fill,minmax(min(132px,100%),1fr))}
  .key{min-width:30px;height:37px;font-size:12px}
}