/* 砚田 · 每日习字 v9 —— 2026-09-17 重构
   范字 / 笔顺演示 / 描红统一由 hanzi-writer 轮廓渲染，同形同源 */

:root{
  --paper:#F4EEDF;
  --paper-hi:#FBF6EA;
  --paper-deep:#EAE1CC;
  --ink:#2B241C;
  --ink-soft:#5C5143;
  --red:#B03A2E;
  --red-deep:#8E2D24;
  --red-soft:#E8CFC4;
  --line:#D8CDB6;
  --line-2:#C9BCA2;
  --ok:#5B7A54;
  --ok-soft:#DDE6D4;
  --warn:#9A6B2F;
  --shadow:0 8px 28px rgba(90,72,48,.12);
  --radius:14px;
  --font-kai:"Noto Serif SC","Xingkai SC","STXingkai","华文行楷","KaiTi","楷体",serif;
  --font-body:"Noto Sans SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none !important}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
/* 宣纸颗粒纹理 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23p)' opacity='0.05'/%3E%3C/svg%3E");
}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
a{color:var(--red-deep)}
button{font-family:inherit}

/* ===== 米字格（可复用）=====
   注：不用多层 gradient 堆叠 —— Chromium 153 实测多层渐变背景会整体渲染发黑；
   改用单层 SVG data-uri，稳定且可拉伸。 */
.rice-grid{
  background-color:#FBF6EA;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 300' preserveAspectRatio='none'%3E%3Crect width='300' height='300' fill='%23FBF6EA'/%3E%3Cg stroke='%23D8CDB6' stroke-width='1.5'%3E%3Cline x1='100' y1='0' x2='100' y2='300'/%3E%3Cline x1='200' y1='0' x2='200' y2='300'/%3E%3Cline x1='0' y1='100' x2='300' y2='100'/%3E%3Cline x1='0' y1='200' x2='300' y2='200'/%3E%3Cline x1='0' y1='0' x2='300' y2='300'/%3E%3Cline x1='300' y1='0' x2='0' y2='300'/%3E%3C/g%3E%3Cg stroke='%23C9BCA2' stroke-width='2'%3E%3Cline x1='150' y1='0' x2='150' y2='300'/%3E%3Cline x1='0' y1='150' x2='300' y2='150'/%3E%3C/g%3E%3C/svg%3E");
  background-size:100% 100%;
}

/* ===== 顶栏 ===== */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 0;border-bottom:2px solid var(--line);flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-seal{
  width:44px;height:44px;flex:none;display:flex;align-items:center;justify-content:center;
  background:var(--red);color:var(--paper-hi);font-family:var(--font-kai);
  font-size:1.35rem;font-weight:700;border-radius:10px;box-shadow:0 3px 0 var(--red-deep);
  transform:rotate(-3deg);
}
.brand-name{font-family:var(--font-kai);font-size:1.25rem;font-weight:700;letter-spacing:.05em}
.brand-sub{font-size:.72rem;color:var(--ink-soft);letter-spacing:.12em}
.tabs{display:flex;gap:4px;background:var(--paper-deep);padding:4px;border-radius:12px}
.tab{
  border:0;background:transparent;padding:8px 18px;border-radius:9px;cursor:pointer;
  font-size:.92rem;color:var(--ink-soft);transition:all .2s;white-space:nowrap;
}
.tab:hover{color:var(--ink)}
.tab.active{background:var(--paper-hi);color:var(--red-deep);font-weight:700;box-shadow:0 2px 8px rgba(90,72,48,.14)}
.back-home{
  font-size:.82rem;color:var(--ink-soft);text-decoration:none;border:1px solid var(--line-2);
  padding:6px 12px;border-radius:999px;transition:all .2s;
}
.back-home:hover{color:var(--red-deep);border-color:var(--red);background:var(--paper-hi)}

/* ===== 视图 ===== */
.view{display:none;padding:24px 0 60px;animation:fadeIn .35s ease}
.view.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.card{
  background:var(--paper-hi);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:20px;
}
.card h2{
  font-family:var(--font-kai);font-size:1.05rem;font-weight:700;color:var(--red-deep);
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.card h2::before{content:"";width:14px;height:14px;background:var(--red);border-radius:3px;transform:rotate(45deg);flex:none}
.font-label{font-size:.78rem;color:var(--ink-soft)}

/* ===== 课程视图 ===== */
.courses-hero{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:20px;flex-wrap:wrap}
.courses-hero h2{margin-bottom:6px}
.courses-sub{font-size:.88rem;color:var(--ink-soft);max-width:560px}
.courses-progress{font-size:.84rem;color:var(--red-deep);font-weight:700;margin-top:8px}
.level-block{margin-bottom:22px}
.level-head{display:flex;align-items:baseline;gap:10px;margin:0 0 10px;flex-wrap:wrap}
.level-name{font-family:var(--font-kai);font-weight:700;font-size:1.02rem;color:var(--red-deep)}
.level-desc{font-size:.8rem;color:var(--ink-soft)}
.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(98px,1fr));gap:10px}
.lesson-tile{
  background:var(--paper-hi);border:2px solid var(--line);border-radius:12px;
  padding:12px 4px 8px;text-align:center;cursor:pointer;transition:all .18s;position:relative;
}
.lesson-tile:hover{border-color:var(--red);transform:translateY(-2px);box-shadow:0 4px 14px rgba(176,58,46,.14)}
.lesson-tile .lt-char{font-family:var(--font-kai);font-size:2rem;line-height:1.25;color:var(--ink)}
.lesson-tile .lt-status{position:absolute;top:6px;right:8px;font-size:.78rem;line-height:1}
.lesson-tile .lt-focus{font-size:.66rem;color:var(--ink-soft);display:block;margin-top:3px;line-height:1.4;min-height:2.6em}
.lesson-tile.done{border-color:var(--ok);background:var(--ok-soft)}
.lesson-tile.done .lt-status{color:var(--ok)}
.lesson-tile.next{border-color:var(--red);box-shadow:0 0 0 2px var(--red-soft)}
.lesson-tile.next .lt-status{color:var(--red)}
.lesson-tile.cur{border-color:var(--red);background:var(--red-soft)}

/* 课程内播放器 */
.lesson-player{background:var(--paper-hi);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.lp-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.lp-back{border:1px solid var(--line-2);background:var(--paper-deep);color:var(--ink);padding:6px 14px;border-radius:9px;cursor:pointer;font-size:.85rem}
.lp-back:hover{border-color:var(--red);color:var(--red-deep)}
.lp-title{font-family:var(--font-kai);font-size:1.3rem;font-weight:700;color:var(--red-deep)}
.lp-steps{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}
.lp-step-ind{
  font-size:.78rem;color:var(--ink-soft);padding:4px 10px;border-radius:999px;
  border:1px solid var(--line);background:var(--paper);
}
.lp-step-ind.cur{background:var(--red);border-color:var(--red);color:#fff;font-weight:700}
.lp-step-ind.ok{color:var(--ok);border-color:var(--ok)}
.lp-panel{display:none;animation:fadeIn .3s ease}
.lp-panel.active{display:block}
.lp-grid{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start}
.lp-stage{width:280px;height:280px;flex:none;position:relative;border:2px solid var(--line-2);border-radius:8px;overflow:hidden}
.lp-stage svg{display:block}
.lp-info h3{font-family:var(--font-kai);font-size:1.15rem;color:var(--ink);margin-bottom:8px}
.lp-info .lp-focus{font-size:.95rem;line-height:1.9;color:var(--ink);background:var(--paper-deep);border-radius:10px;padding:12px 14px}
.lp-info .lp-tip{font-size:.86rem;color:var(--ink-soft);line-height:1.8;margin-top:10px}
.lp-info .lp-tip b{color:var(--red-deep)}
.lp-hint{font-size:.84rem;color:var(--red-deep);margin-top:10px;min-height:1.5em;font-weight:600}
.lp-nav{display:flex;justify-content:space-between;gap:10px;margin-top:18px;flex-wrap:wrap}
.shake{animation:shake .4s ease}
@keyframes shake{
  0%,100%{transform:translateX(0)}
  20%{transform:translateX(-7px)} 40%{transform:translateX(7px)}
  60%{transform:translateX(-5px)} 80%{transform:translateX(5px)}
}
.lp-done{text-align:center;padding:34px 16px}
.lp-done .done-emoji{font-size:3rem;line-height:1}
.lp-done .done-char{font-family:var(--font-kai);font-size:2.6rem;color:var(--red-deep);margin:8px 0 4px}
.lp-done .done-sub{font-size:.9rem;color:var(--ink-soft);margin-bottom:18px}
.lp-done .done-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* ===== 练字视图 ===== */
.hero-row{display:grid;grid-template-columns:1fr 360px;gap:22px;align-items:start}
.input-panel{padding:18px 20px;margin-bottom:20px}
.input-row{display:flex;gap:12px}
.char-input{
  flex:1;min-width:0;font-family:var(--font-kai);font-size:1.35rem;padding:12px 16px;
  border:2px solid var(--line-2);border-radius:10px;background:var(--paper-hi);color:var(--ink);
  outline:none;transition:border-color .2s;
}
.char-input:focus{border-color:var(--red)}
.char-input::placeholder{color:#A89C88;font-size:1rem;font-family:var(--font-body)}
.btn{
  border:0;cursor:pointer;border-radius:10px;font-size:.95rem;padding:10px 22px;
  transition:all .2s;white-space:nowrap;
}
.btn-primary{background:var(--red);color:#fff;font-weight:700;box-shadow:0 3px 0 var(--red-deep)}
.btn-primary:hover{background:var(--red-deep)}
.btn-ghost{background:var(--paper-deep);color:var(--ink);border:1px solid var(--line-2)}
.btn-ghost:hover{background:var(--line)}
.btn-sm{padding:5px 12px;font-size:.82rem;border-radius:8px}
.recent-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;align-items:center}
.chip-label{font-size:.8rem;color:var(--ink-soft)}
.chip{
  border:1px solid var(--line-2);background:var(--paper-hi);color:var(--ink);
  padding:3px 12px;border-radius:999px;cursor:pointer;font-family:var(--font-kai);
  font-size:1.1rem;transition:all .2s;
}
.chip:hover{border-color:var(--red);color:var(--red-deep);transform:translateY(-1px)}

/* 范字卡 */
.model-card{text-align:center;position:relative;margin-bottom:20px}
.model-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.grid-box{
  width:210px;height:210px;margin:10px auto 8px;position:relative;
  border:2px solid var(--line-2);border-radius:6px;overflow:hidden;
}
.model-meta{display:flex;justify-content:center;gap:14px;font-size:.88rem;color:var(--ink-soft);margin:4px 0 4px;flex-wrap:wrap}
.model-meta b{color:var(--ink)}
.seal{
  position:absolute;right:6px;bottom:4px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  background:var(--red);color:var(--paper-hi);font-family:var(--font-kai);font-size:1.15rem;
  border-radius:50% 50% 50% 8px;box-shadow:0 2px 0 var(--red-deep);transform:rotate(4deg);z-index:2;pointer-events:none;
}

/* 笔画顺序 */
.demo-card{margin-bottom:20px}
.demo-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.demo-char-title{font-family:var(--font-kai);font-size:1.6rem;color:var(--ink)}
.demo-wrap{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.demo-stage{width:250px;height:250px;flex:none;border:2px solid var(--line-2);border-radius:8px;overflow:hidden}
.demo-stage svg{display:block}
.demo-controls{flex:1;min-width:230px;display:flex;flex-direction:column;gap:10px}
.ctrl-row{display:flex;gap:8px;flex-wrap:wrap}
.ctrl-btn{
  border:1px solid var(--line-2);background:var(--paper-hi);color:var(--ink);
  padding:7px 14px;border-radius:9px;cursor:pointer;font-size:.88rem;transition:all .2s;
}
.ctrl-btn:hover{border-color:var(--red);color:var(--red-deep)}
.ctrl-btn.primary{background:var(--red);color:#fff;border-color:var(--red);font-weight:700}
.ctrl-btn.primary:hover{background:var(--red-deep)}
.speed-row{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--ink-soft)}
.speed-row input[type=range]{flex:1;accent-color:var(--red)}
.stroke-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.stroke-item{
  border:1px solid var(--line-2);background:var(--paper-hi);padding:2px 10px;border-radius:8px;
  font-size:.82rem;color:var(--ink-soft);cursor:pointer;transition:all .2s;
}
.stroke-item:hover{border-color:var(--red);color:var(--red-deep)}
.stroke-item.cur{border-color:var(--red);background:var(--red);color:#fff;font-weight:700}
.stroke-item b{font-family:var(--font-kai);font-size:1rem;margin-right:4px}

/* 笔法要点 */
.tips-card{margin-bottom:20px}
.char-tip{font-size:.95rem;color:var(--ink);line-height:1.8;margin-bottom:6px}
.char-tip b{color:var(--red-deep)}
.tip-list{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.tip-row{
  display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);
  border-radius:10px;background:var(--paper-hi);cursor:pointer;transition:all .2s;
}
.tip-row:hover{border-color:var(--red);box-shadow:0 3px 12px rgba(176,58,46,.12)}
.tip-no{
  flex:none;width:26px;height:26px;border-radius:50%;background:var(--paper-deep);color:var(--ink-soft);
  display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;margin-top:3px;
}
.tip-row.cur .tip-no{background:var(--red);color:#fff}
.tip-name{font-family:var(--font-kai);font-size:1.05rem;font-weight:700;color:var(--ink);margin-bottom:2px}
.tip-row.cur .tip-name{color:var(--red-deep)}
.tip-desc{font-size:.85rem;color:var(--ink-soft);line-height:1.6}

/* ===== 打卡视图 ===== */
.checkin-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px}
.stat-card{background:var(--paper-hi);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow)}
.stat-num{font-family:var(--font-kai);font-size:2rem;font-weight:900;color:var(--red-deep);line-height:1.2}
.stat-label{font-size:.8rem;color:var(--ink-soft);margin-top:2px}
.stat-card.hl{background:var(--red);border-color:var(--red)}
.stat-card.hl .stat-num{color:#fff}
.stat-card.hl .stat-label{color:var(--red-soft)}
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:.85rem;color:var(--ink-soft);margin-bottom:5px;font-weight:600}
.form-group input[type=text],.form-group input[type=date],.form-group input[type=number],.form-group textarea{
  width:100%;padding:10px 12px;border:2px solid var(--line-2);border-radius:9px;background:var(--paper-hi);
  font-family:inherit;font-size:.95rem;color:var(--ink);outline:none;transition:border-color .2s;
}
.form-group input:focus,.form-group textarea:focus{border-color:var(--red)}
.form-group textarea{resize:vertical;min-height:74px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.photo-upload{border:2px dashed var(--line-2);border-radius:10px;padding:18px;text-align:center;cursor:pointer;transition:all .2s;position:relative}
.photo-upload:hover{border-color:var(--red);background:var(--red-soft)}
.photo-upload input{position:absolute;inset:0;opacity:0;cursor:pointer}
.photo-upload .up-txt{font-size:.88rem;color:var(--ink-soft)}
.photo-upload .up-txt b{color:var(--red-deep);font-size:1.4rem;display:block}
.photo-previews{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.photo-prev{width:76px;height:76px;border-radius:8px;object-fit:cover;border:2px solid var(--line);position:relative}
.photo-prev .del{
  position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;background:var(--red);color:#fff;
  border:0;font-size:.7rem;cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.save-row{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.save-msg{font-size:.85rem;color:var(--ok);margin-top:8px}
.hint-tip{font-size:.78rem;color:var(--ink-soft);margin-top:8px;line-height:1.5}
.checkin-today{
  background:var(--paper-hi);border:1px solid var(--line);border-radius:var(--radius);padding:20px;
  box-shadow:var(--shadow);
}
.checkin-today h3{font-family:var(--font-kai);font-size:1.05rem;color:var(--red-deep);margin-bottom:12px}
.today-done{display:flex;flex-direction:column;gap:10px}
.today-done .done-line{display:flex;justify-content:space-between;font-size:.9rem;padding:8px 12px;background:var(--paper-deep);border-radius:8px}
.today-none{color:var(--ink-soft);font-size:.9rem;line-height:1.7}

/* ===== 记录视图 ===== */
.data-tools-card{margin-bottom:20px}
.data-tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.record-list{display:flex;flex-direction:column;gap:16px}
.record-card{background:var(--paper-hi);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.record-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.record-date{font-family:var(--font-kai);font-size:1.05rem;font-weight:700;color:var(--red-deep)}
.record-actions{display:flex;gap:8px}
.record-body{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.record-photos{display:flex;flex-wrap:wrap;gap:8px}
.record-photo{width:96px;height:96px;border-radius:8px;object-fit:cover;cursor:pointer;border:2px solid var(--line);transition:all .2s}
.record-photo:hover{transform:scale(1.04);border-color:var(--red)}
.record-info{font-size:.88rem;color:var(--ink-soft);display:flex;flex-direction:column;gap:6px}
.record-info .rk{color:var(--ink);font-weight:600}
.record-note{font-size:.9rem;color:var(--ink);background:var(--paper-deep);padding:10px 12px;border-radius:8px;margin-top:10px;line-height:1.6}
.empty-tip{text-align:center;color:var(--ink-soft);padding:60px 20px;font-size:.95rem}
.empty-tip .big{font-family:var(--font-kai);font-size:1.4rem;color:var(--line-2);display:block;margin-bottom:8px}
.copy-bar{background:var(--paper-deep);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-top:12px;font-size:.82rem;color:var(--ink-soft);line-height:1.6}
.copy-bar b{color:var(--red-deep)}

/* 灯箱 */
.lightbox{position:fixed;inset:0;background:rgba(30,24,16,.86);z-index:100;display:none;align-items:center;justify-content:center;padding:30px}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:88vh;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;top:18px;right:22px;background:transparent;border:0;color:#fff;font-size:2rem;cursor:pointer;line-height:1}

/* 提示条 */
.toast{
  position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(80px);z-index:200;
  background:var(--ink);color:var(--paper-hi);padding:12px 22px;border-radius:999px;font-size:.9rem;
  box-shadow:0 8px 30px rgba(0,0,0,.25);opacity:0;transition:all .35s ease;pointer-events:none;max-width:86vw;text-align:center;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

footer{border-top:2px solid var(--line);padding:22px 0 30px;text-align:center;font-size:.78rem;color:var(--ink-soft);line-height:1.8}
footer b{color:var(--red-deep)}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .hero-row{grid-template-columns:1fr}
  .checkin-grid{grid-template-columns:1fr}
  .record-body{grid-template-columns:1fr}
}
@media(max-width:640px){
  body{font-size:15px}
  .wrap{padding:0 14px}
  .tabs{width:100%}
  .tab{flex:1;padding:9px 6px;font-size:.86rem}
  .brand-sub{display:none}
  .char-input{font-size:1.15rem;padding:11px 12px}
  .btn{padding:10px 16px}
  .grid-box{width:170px;height:170px}
  .demo-stage{width:210px;height:210px;margin:0 auto}
  .stats-row{grid-template-columns:repeat(3,1fr);gap:8px}
  .stat-num{font-size:1.6rem}
  .input-row{flex-direction:column}
  .input-row .btn{width:100%}
  .lesson-grid{grid-template-columns:repeat(auto-fill,minmax(84px,1fr))}
  .lp-grid{grid-template-columns:1fr}
  .lp-stage{margin:0 auto;width:240px;height:240px}
  .lp-steps{margin-left:0}
}