/* ============================================================
   中小学英语单词拼写赛 · 日系极简
   近中性灰白 / 极致留白 / 1px 细线 / 无阴影无渐变
   ============================================================ */

:root{
  --c-primary:#637e6a;
  --c-secondary:#917882;
  --c-cta:#9c6371;
  --c-bg:#f8fbf9;
  --c-surface:#ffffff;
  --c-text:#1b2c20;
  --c-text-2:#5c7a64;
  --c-line:#dbe6de;
  --r:2px;
  --font:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  --w:1080px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
button{font-family:inherit;cursor:pointer}
::selection{background:rgba(99,126,106,.18)}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}

.container{max-width:var(--w);margin:0 auto;padding:0 24px}
.is-hidden{display:none!important}

/* ---------- 页头 ---------- */
.site-header{border-bottom:1px solid var(--c-line);background:var(--c-bg)}
.header-inner{
  max-width:var(--w);margin:0 auto;padding:18px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{width:22px;height:22px;background:var(--c-primary);border-radius:var(--r);position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:4px;border:1px solid rgba(255,255,255,.75)}
.brand-name{font-weight:800;letter-spacing:.05em;font-size:15px;line-height:1.3}
.brand-name small{display:block;font-size:10px;font-weight:500;letter-spacing:.3em;color:var(--c-text-2);text-transform:uppercase}
.nav{display:flex;flex-wrap:wrap;gap:2px}
.nav a{padding:8px 14px;font-size:14px;color:var(--c-text-2);text-decoration:none;border-radius:var(--r);transition:color .15s,background .15s}
.nav a:hover{color:var(--c-text);background:rgba(99,126,106,.09)}
.nav a.active{color:var(--c-text);font-weight:700;background:rgba(99,126,106,.12)}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--c-line);padding:34px 0;margin-top:72px}
.footer-inner{
  max-width:var(--w);margin:0 auto;padding:0 24px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-2);
}

/* ---------- 排版 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-size:12px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--c-text-2);font-weight:600;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--c-primary)}
h1{font-size:clamp(34px,6vw,72px);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin:20px 0 24px}
.lede{font-size:clamp(15px,2vw,18px);color:var(--c-text-2);max-width:62ch}

.hero{padding:clamp(72px,14vw,150px) 0 clamp(40px,7vw,80px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:40px}

.section{padding:clamp(48px,9vw,92px) 0}
.section-head{margin-bottom:36px}
.section-title{font-size:clamp(24px,4vw,34px);font-weight:800;letter-spacing:-.01em;margin-top:12px}
.section-sub{color:var(--c-text-2);margin-top:8px;font-size:15px}

.page-head{padding:clamp(56px,10vw,110px) 0 8px}
.page-head h1{font-size:clamp(30px,5vw,50px);font-weight:800;letter-spacing:-.02em;margin:14px 0 10px}
.page-head p{color:var(--c-text-2);max-width:58ch}
.page-head .actions,.empty .actions{margin-top:26px;display:flex;gap:10px;flex-wrap:wrap}
.empty .actions{justify-content:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border:1px solid var(--c-line);border-radius:var(--r);
  background:transparent;color:var(--c-text);font-size:15px;letter-spacing:.03em;
  text-decoration:none;white-space:nowrap;
  transition:background .15s,color .15s,border-color .15s,filter .15s;
}
.btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn--primary{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.btn--primary:hover{filter:brightness(.93);color:#fff}
.btn--cta{background:var(--c-cta);border-color:var(--c-cta);color:#fff}
.btn--cta:hover{filter:brightness(.93);color:#fff}
.btn--ghost{color:var(--c-primary);border-color:var(--c-line)}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);background:rgba(99,126,106,.06)}
.btn--sm{padding:8px 16px;font-size:13px}
.btn--block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed;filter:none}

/* ---------- 版本切换 / 参数组 ---------- */
.pill-group{display:inline-flex;border:1px solid var(--c-line);border-radius:var(--r);overflow:hidden;background:var(--c-surface)}
.pill-group button{border:none;background:transparent;padding:10px 20px;font-size:14px;color:var(--c-text-2);transition:background .15s,color .15s}
.pill-group button + button{border-left:1px solid var(--c-line)}
.pill-group button:hover{color:var(--c-text)}
.pill-group button.active{background:var(--c-primary);color:#fff}

/* ---------- 年级卡片 ---------- */
.grade-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.grade-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r);
  padding:26px 24px;text-decoration:none;display:block;position:relative;
  transition:border-color .15s,transform .15s;
}
.grade-card:hover{border-color:var(--c-primary);transform:translateY(-2px)}
.grade-card .num{font-size:12px;letter-spacing:.25em;color:var(--c-text-2)}
.grade-card h3{font-size:22px;font-weight:800;margin:10px 0 6px}
.grade-card .meta{font-size:13px;color:var(--c-text-2);display:flex;gap:8px;align-items:center}
.grade-card .go{position:absolute;right:20px;top:50%;transform:translateY(-50%);color:var(--c-primary);font-size:20px;opacity:0;transition:opacity .15s}
.grade-card:hover .go{opacity:1}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--c-line)}
.step{padding:30px 24px;border-left:1px solid var(--c-line)}
.step:first-child{border-left:none;padding-left:0}
.step .idx{font-size:13px;letter-spacing:.25em;color:var(--c-secondary)}
.step h3{font-size:18px;font-weight:800;margin:10px 0 6px}
.step p{font-size:14px;color:var(--c-text-2)}

/* ---------- 特性 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r);padding:30px 26px}
.feature b{display:block;font-size:38px;font-weight:800;letter-spacing:-.02em;color:var(--c-primary);line-height:1}
.feature:nth-child(2) b{color:var(--c-secondary)}
.feature:nth-child(3) b{color:var(--c-cta)}
.feature h3{font-size:16px;font-weight:800;margin:12px 0 6px}
.feature p{font-size:14px;color:var(--c-text-2)}

/* ---------- 表单 ---------- */
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r)}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:26px 28px}
.field > label{display:block;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--c-text-2);margin-bottom:12px;font-weight:600}
.select-wrap{position:relative;display:inline-block;width:100%}
.select-wrap::after{
  content:"";width:0;height:0;
  border-left:5px solid transparent;border-right:5px solid transparent;border-top:6px solid var(--c-primary);
  position:absolute;right:14px;top:50%;transform:translateY(-50%);pointer-events:none;
}
.select{
  appearance:none;-webkit-appearance:none;
  width:100%;border:1px solid var(--c-line);border-radius:var(--r);background:var(--c-surface);
  padding:12px 38px 12px 14px;font-family:inherit;font-size:15px;color:var(--c-text);
  cursor:pointer;transition:border-color .15s;
}
.select:focus{outline:none;border-color:var(--c-primary)}
.input{
  width:100%;border:1px solid var(--c-line);border-radius:var(--r);background:var(--c-surface);
  padding:12px 14px;font-family:inherit;font-size:16px;color:var(--c-text);
  transition:border-color .15s;
}
.input:focus{outline:none;border-color:var(--c-primary)}
.setup-actions{margin-top:34px}

/* ---------- 比赛页 ---------- */
.game-top{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.qnum{font-size:15px;color:var(--c-text-2);margin-top:6px}
.qnum b{color:var(--c-text);font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}
.timer{font-size:clamp(40px,8vw,64px);font-weight:800;line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--c-text)}
.timer .unit{font-size:.35em;color:var(--c-text-2);font-weight:600;margin-left:4px}
.timer.low{color:var(--c-cta)}
.score-tag{font-size:14px;color:var(--c-text-2)}
.score-tag b{font-size:22px;font-weight:800;color:var(--c-text);font-variant-numeric:tabular-nums;margin-left:4px}
.progress{height:2px;background:var(--c-line);position:relative;margin:0 0 34px}
.progress i{position:absolute;left:0;top:0;bottom:0;width:0;background:var(--c-primary);transition:width .3s ease}

.word-card{padding:clamp(36px,7vw,64px) clamp(22px,5vw,56px);text-align:center}
.word-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:30px}
.tag{font-size:11px;letter-spacing:.18em;color:var(--c-text-2);text-transform:uppercase;border:1px solid var(--c-line);border-radius:var(--r);padding:4px 10px;white-space:nowrap}
.input--word{
  border:none;border-bottom:2px solid var(--c-line);background:transparent;border-radius:0;
  font-size:clamp(28px,7vw,46px);font-weight:700;text-align:center;letter-spacing:.06em;
  padding:8px 4px;color:var(--c-text);
}
.input--word:focus{outline:none;border-bottom-color:var(--c-cta)}
.input--word.ok{border-bottom-color:var(--c-primary)}
.input--word.no{border-bottom-color:var(--c-cta);animation:shake .3s}
.hint{font-size:13px;letter-spacing:.25em;color:var(--c-text-2);margin-top:14px;min-height:20px}
.feedback{font-size:16px;margin-top:14px;min-height:26px;font-weight:800;letter-spacing:.04em}
.feedback.ok{color:var(--c-primary)}
.feedback.no{color:var(--c-cta)}
.word-actions{display:flex;gap:12px;justify-content:center;margin-top:36px;flex-wrap:wrap}

/* ---------- 结果页 ---------- */
.result-head{text-align:center;padding:clamp(28px,5vw,52px) 0 36px}
.score-big{font-size:clamp(56px,12vw,120px);font-weight:800;letter-spacing:-.03em;line-height:1;color:var(--c-cta);font-variant-numeric:tabular-nums;margin:18px 0 10px}
.result-stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--c-line);border-radius:var(--r);background:var(--c-surface);overflow:hidden}
.result-stats>div{padding:22px 14px;text-align:center;border-left:1px solid var(--c-line)}
.result-stats>div:first-child{border-left:none}
.result-stats span{display:block;font-size:11px;letter-spacing:.2em;color:var(--c-text-2);text-transform:uppercase;font-weight:600}
.result-stats b{font-size:26px;font-weight:800;font-variant-numeric:tabular-nums}
.result-words{margin-top:44px}
.result-words h3{font-size:15px;font-weight:800;letter-spacing:.08em;margin-bottom:6px}
.result-actions{display:flex;gap:12px;justify-content:center;margin-top:44px;flex-wrap:wrap}

/* ---------- 错词列表 ---------- */
.word-list{list-style:none}
.word-list li{
  display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:16px 0;border-bottom:1px solid var(--c-line);
}
.word-list .w{font-weight:800;font-size:17px;min-width:120px;letter-spacing:.02em}
.word-list .ph{color:var(--c-text-2);font-size:14px;flex:1}
.word-list .me{color:var(--c-text);font-size:14px;flex:1}
.word-list .src{font-size:12px;color:var(--c-text-2);letter-spacing:.08em;white-space:nowrap}
.li-actions{display:flex;gap:8px;flex-wrap:wrap}

/* ---------- 排行榜 ---------- */
.table-wrap{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r);overflow-x:auto}
.table{width:100%;border-collapse:collapse;font-size:14px;min-width:680px}
.table th{padding:14px 16px;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--c-text-2);border-bottom:1px solid var(--c-line);text-align:left;font-weight:600}
.table td{padding:15px 16px;border-bottom:1px solid var(--c-line);vertical-align:middle}
.table tr:last-child td{border-bottom:none}
.table .rank{font-weight:800;font-variant-numeric:tabular-nums;color:var(--c-text-2)}
.table .rank.top1{color:var(--c-cta)}
.table .rank.top2{color:var(--c-secondary)}
.table .rank.top3{color:var(--c-primary)}
.table .name b{font-weight:800}
.table tr.me td{background:rgba(156,99,113,.06)}

/* ---------- 空状态 ---------- */
.empty{padding:clamp(48px,9vw,90px) 0;text-align:center;color:var(--c-text-2)}
.empty b{display:block;font-size:18px;color:var(--c-text);margin-bottom:8px;font-weight:800}

/* ---------- 动效 ---------- */
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.rise{animation:rise .55s ease both}
.d1{animation-delay:.05s}.d2{animation-delay:.12s}.d3{animation-delay:.2s}.d4{animation-delay:.3s}

/* ---------- 响应式 ---------- */
@media (max-width:860px){
  .header-inner{flex-direction:column;align-items:flex-start}
  .steps{grid-template-columns:1fr}
  .step{border-left:none;border-top:1px solid var(--c-line);padding-left:0}
  .step:first-child{border-top:none}
  .feature-grid{grid-template-columns:1fr}
  .result-stats{grid-template-columns:1fr 1fr}
  .result-stats>div{border-left:none;border-top:1px solid var(--c-line)}
  .result-stats>div:nth-child(-n+2){border-top:none}
}
@media (max-width:640px){
  .word-list li{flex-wrap:wrap}
  .word-list .w{min-width:0;flex:1 1 100%}
  .word-list .ph,.word-list .me{flex:1 1 100%}
  .li-actions{margin-top:6px}
  .word-list .src{width:100%}
  .game-top{justify-content:space-between}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}