/* 欢乐伙伴字卡 · 2015 版 1A–6B + 2.0 版 1A–3B */
:root{--teal:#0f766e;--teal2:#14b8a6;--teal-soft:#ccfbf1;--ink:#1f2937;--muted:#6b7280;--line:#e5e7eb;--paper:#f6f8f7;--card:#fff;--amber:#f59e0b;--red:#e11d48;--green:#16a34a}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--paper);color:var(--ink)}
button,input{font:inherit}
.kai{font-family:"Kaiti SC","STKaiti","KaiTi","BiauKai",serif}
/* header */
.zk-top{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(0,0,0,.04)}
.zk-bar{max-width:1180px;margin:0 auto;padding:8px 16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.zk-brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink)}
.zk-brand img{height:38px;width:auto}
.zk-brand b{font-size:17px;font-weight:900;display:block;line-height:1.1}.zk-brand small{font-size:11px;color:var(--teal);font-weight:700}
.zk-seg{display:inline-flex;background:#eef2f1;border-radius:999px;padding:3px}
.zk-seg button{border:0;background:none;padding:6px 14px;border-radius:999px;font-weight:800;font-size:14px;color:var(--muted);cursor:pointer}
.zk-seg button.on{background:#fff;color:var(--teal);box-shadow:0 1px 4px rgba(0,0,0,.1)}
.zk-search{flex:1;min-width:160px;max-width:300px;margin-left:auto;position:relative}
.zk-search input{width:100%;border:1.5px solid var(--line);border-radius:999px;padding:7px 14px 7px 34px;font-size:14px;background:#f9fafb}
.zk-search::before{content:"🔍";position:absolute;left:11px;top:50%;transform:translateY(-50%);font-size:13px}
.zk-search input:focus{outline:none;border-color:var(--teal2);background:#fff}
.zk-back{font-size:13px;font-weight:800;color:var(--teal);text-decoration:none;white-space:nowrap}
.zk-books{max-width:1180px;margin:0 auto;padding:0 16px 8px;display:flex;gap:6px;flex-wrap:wrap}
.zk-book{border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:4px 12px;font-weight:900;font-size:15px;cursor:pointer;color:var(--ink)}
.zk-book small{font-size:11px;color:var(--muted);font-weight:700;margin-left:4px}
.zk-book.on{background:var(--teal);border-color:var(--teal);color:#fff}.zk-book.on small{color:#d1fae5}
/* main */
.zk-wrap{max-width:1180px;margin:0 auto;padding:18px 16px 60px}
.zk-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.zk-head h1{font-size:26px;font-weight:900}
.zk-head h1 em{font-style:normal;color:var(--teal)}
.zk-head p{color:var(--muted);font-size:14px;margin-top:2px}
.zk-prog{font-size:13px;font-weight:800;color:var(--teal);background:var(--teal-soft);border-radius:999px;padding:5px 12px}
.zk-lessons{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.zk-lesson{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-size:14px;font-weight:800;cursor:pointer;position:relative;overflow:hidden;color:var(--ink)}
.zk-lesson i{position:absolute;left:0;bottom:0;height:3px;background:var(--green)}
.zk-lesson.on{border-color:var(--teal);background:var(--teal);color:#fff}
.zk-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.zk-tab{border:0;background:#fff;border:1.5px solid var(--line);border-radius:12px;padding:8px 14px;font-weight:900;font-size:15px;cursor:pointer;color:var(--ink)}
.zk-tab.on{background:var(--ink);border-color:var(--ink);color:#fff}
.zk-play{display:flex;align-items:center;gap:6px;flex-wrap:wrap;background:#fffbeb;border:1px dashed #fcd34d;border-radius:12px;padding:8px 12px;margin-bottom:16px;font-size:13px;font-weight:800;color:#92400e}
.zk-play a{background:#fff;border:1.5px solid #fcd34d;border-radius:999px;padding:4px 10px;color:#92400e;text-decoration:none;font-weight:800}
.zk-play a:hover{background:#fde68a}
/* grid */
.zk-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.zk-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 8px 10px;text-align:center;cursor:pointer;transition:transform .12s,box-shadow .12s}
.zk-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.08)}
.zk-card .h{font-size:60px;line-height:1.1;color:#111}
.zk-card .p{font-size:16px;color:var(--teal);font-weight:700;margin-top:2px}
.zk-card .w{font-size:13px;color:var(--muted);margin-top:4px;min-height:18px}
.zk-card .e{position:absolute;top:6px;left:8px;font-size:18px}
.zk-card.ok::after{content:"✓";position:absolute;top:6px;right:8px;width:20px;height:20px;border-radius:50%;background:var(--green);color:#fff;font-size:12px;font-weight:900;display:grid;place-items:center}
.zk-card.weak{border-color:#fda4af}
.zk-empty{color:var(--muted);padding:40px;text-align:center}
.zk-lesson-h{font-size:18px;font-weight:900;margin:18px 0 8px;color:var(--teal)}
/* modal */
.zk-ov{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:80;display:none;align-items:center;justify-content:center;padding:14px}
.zk-ov.show{display:flex}
.zk-box{background:#fff;border-radius:22px;width:min(560px,100%);max-height:94vh;overflow-y:auto;padding:20px 22px;position:relative;text-align:center}
.zk-x{position:absolute;top:10px;right:12px;border:0;background:#f3f4f6;width:34px;height:34px;border-radius:50%;font-size:16px;cursor:pointer}
.zk-big{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap}
.zk-hw{width:200px;height:200px;border:2px solid #fca5a5;border-radius:8px;position:relative;background:#fff}
.zk-hw::before,.zk-hw::after{content:"";position:absolute;inset:0;pointer-events:none}
.zk-hw::before{background:linear-gradient(#fecaca,#fecaca) center/100% 1px no-repeat,linear-gradient(#fecaca,#fecaca) center/1px 100% no-repeat}
.zk-hw::after{background:linear-gradient(45deg,transparent 49.6%,#fee2e2 50%,transparent 50.4%),linear-gradient(-45deg,transparent 49.6%,#fee2e2 50%,transparent 50.4%)}
.zk-hw svg{position:relative;z-index:1}
.zk-hw .fb{position:absolute;inset:0;display:grid;place-items:center;font-size:150px;line-height:1;z-index:1}
.zk-info .py{font-size:34px;color:var(--teal);font-weight:800}
.zk-info .em{font-size:44px}
.zk-words{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:14px 0}
.zk-words button{border:1.5px solid var(--line);background:#f9fafb;border-radius:12px;padding:6px 14px;font-size:20px;cursor:pointer}
.zk-words button b{color:var(--red);font-weight:400}
.zk-acts{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.zk-btn{border:0;border-radius:999px;padding:9px 18px;font-weight:900;font-size:15px;cursor:pointer;background:#f3f4f6;color:var(--ink)}
.zk-btn.main{background:var(--teal);color:#fff}
.zk-btn.ok{background:var(--green);color:#fff}
.zk-btn.warn{background:#ffe4e6;color:var(--red)}
.zk-nav{display:flex;justify-content:space-between;margin-top:14px}
/* flash */
.zk-flash{display:flex;flex-direction:column;align-items:center;gap:14px;padding:10px 0}
.zk-fc{width:min(360px,86vw);height:min(420px,60vh);perspective:1200px;cursor:pointer}
.zk-fc-in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.zk-fc.flip .zk-fc-in{transform:rotateY(180deg)}
.zk-fc-f,.zk-fc-b{position:absolute;inset:0;backface-visibility:hidden;border-radius:24px;background:#fff;border:2px solid var(--line);box-shadow:0 12px 30px rgba(0,0,0,.08);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:16px}
.zk-fc-f .h{font-size:min(190px,30vh);line-height:1}
.zk-fc-b{transform:rotateY(180deg);background:linear-gradient(160deg,#f0fdfa,#fff)}
.zk-fc-b .p{font-size:44px;color:var(--teal);font-weight:800}.zk-fc-b .w{font-size:24px}.zk-fc-b .e{font-size:54px}
.zk-fc-hint{font-size:13px;color:var(--muted)}
.zk-count{font-weight:900;color:var(--muted)}
/* quiz */
.zk-quiz{max-width:560px;margin:0 auto;background:#fff;border-radius:22px;border:1px solid var(--line);padding:20px;text-align:center}
.zk-q-h{font-weight:900;color:var(--muted);font-size:14px}
.zk-q-ask{font-size:20px;font-weight:900;margin:8px 0 12px}
.zk-q-big{font-size:110px;line-height:1.1}
.zk-q-snd{border:0;width:110px;height:110px;border-radius:50%;font-size:46px;background:radial-gradient(circle at 35% 30%,#fef3c7,#f59e0b);box-shadow:0 6px 0 #b45309;cursor:pointer;margin-bottom:10px}
.zk-q-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.zk-q-opts button{border:2px solid var(--line);background:#f9fafb;border-radius:16px;padding:10px;font-size:34px;cursor:pointer;min-height:76px}
.zk-q-opts button.py{font-size:24px;font-weight:800;color:var(--teal);font-family:inherit}
.zk-q-opts button.right{border-color:var(--green);background:#dcfce7}
.zk-q-opts button.wrong{border-color:var(--red);background:#ffe4e6;animation:zkShake .35s}
@keyframes zkShake{25%,75%{transform:translateX(-6px)}50%{transform:translateX(6px)}}
.zk-stars{font-size:46px;letter-spacing:4px}
.zk-res-list{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:10px 0}
.zk-res-list span{border:1.5px solid #fda4af;background:#fff1f2;border-radius:10px;padding:2px 10px;font-size:24px}
/* match */
.zk-mhead{display:flex;justify-content:center;gap:16px;font-weight:900;color:var(--muted);margin-bottom:12px}
.zk-mgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:640px;margin:0 auto}
.zk-m{aspect-ratio:1;border-radius:16px;cursor:pointer;perspective:800px}
.zk-m-in{position:relative;width:100%;height:100%;transition:transform .35s;transform-style:preserve-3d}
.zk-m.open .zk-m-in,.zk-m.done .zk-m-in{transform:rotateY(180deg)}
.zk-m-f,.zk-m-b{position:absolute;inset:0;backface-visibility:hidden;border-radius:16px;display:grid;place-items:center}
.zk-m-f{background:linear-gradient(135deg,var(--teal2),var(--teal));color:#fff;font-size:28px;font-weight:900}
.zk-m-b{transform:rotateY(180deg);background:#fff;border:2px solid var(--line);font-size:clamp(22px,6vw,46px)}
.zk-m-b.py{font-size:clamp(15px,3.6vw,24px);color:var(--teal);font-weight:800}
.zk-m.done .zk-m-b{border-color:var(--green);background:#f0fdf4}
/* projector */
.zk-proj{position:fixed;inset:0;z-index:90;background:#fffdf7;display:none;flex-direction:column;align-items:center;justify-content:center;gap:10px}
.zk-proj.show{display:flex}
.zk-proj .h{font-size:min(56vh,46vw);line-height:1}
.zk-proj .p{font-size:min(9vh,7vw);color:var(--teal);font-weight:800;min-height:1.2em}
.zk-proj .w{font-size:min(6vh,5vw);color:#374151;min-height:1.2em}
.zk-proj-bar{position:fixed;top:12px;left:12px;right:12px;display:flex;justify-content:space-between;align-items:center;gap:8px;font-weight:900;color:var(--muted)}
.zk-proj-bar .zk-btn{padding:7px 14px;font-size:14px}
.zk-proj-tip{position:fixed;bottom:12px;font-size:13px;color:#9ca3af}
/* print */
.zk-print-opts{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.zk-print-opts label{font-weight:800;font-size:14px;display:flex;align-items:center;gap:6px}
#zkPrint{display:none}
.zk-foot{max-width:1180px;margin:0 auto;padding:20px 16px 40px;font-size:12px;color:#9ca3af;text-align:center;line-height:1.8}
@media (max-width:640px){.zk-grid{grid-template-columns:repeat(2,1fr)}.zk-card .h{font-size:52px}.zk-head h1{font-size:21px}.zk-search{max-width:none;order:5;flex-basis:100%}.zk-hw{width:170px;height:170px}.zk-hw .fb{font-size:128px}}
@media print{
  body{background:#fff}
  body>*:not(#zkPrint){display:none!important}
  #zkPrint{display:block!important}
  @page{size:A4;margin:10mm}
  .pp{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:repeat(4,1fr);height:277mm;page-break-after:always;border-top:1px dashed #bbb;border-left:1px dashed #bbb}
  .pp:last-child{page-break-after:auto}
  .pc{border-right:1px dashed #bbb;border-bottom:1px dashed #bbb;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2mm;position:relative}
  .pc .h{font-size:120px;line-height:1}
  .pc .p{font-size:26px;color:#0f766e;font-weight:700}
  .pc .w{font-size:18px;color:#333}
  .pc .t{position:absolute;bottom:2mm;right:3mm;font-size:9px;color:#aaa}
  .pp.nopy .p{display:none}
}