/* 字园 Hanzi Garden */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --paper:#f6f2ea;--card:#fffdf9;--ink:#1e1a15;--ink2:#5d554b;--ink3:#8d8379;
  --line:#e5ddd0;--cinnabar:#b8352c;--cinnabar2:#d4574a;--gold:#b8912f;
  --serif:"Songti SC","STSong",SimSun,"Noto Serif CJK SC",serif;
  --kai:"KaiTi",STKaiti,"Kaiti SC","Songti SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ar:"Segoe UI",Tahoma,"Noto Naskh Arabic",Arial,sans-serif;
}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.75;
  background-image:radial-gradient(circle at 15% 0%,#fffaf2 0%,rgba(255,250,242,0) 55%)}
a{color:inherit;text-decoration:none}
em{font-style:normal}
.skip{position:absolute;left:-9999px}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.narrow{max-width:960px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 28px;box-shadow:0 1px 2px rgba(120,100,70,.04)}
.card.pad{padding:22px 24px}

/* 顶栏 */
.site{border-bottom:1px solid var(--line);background:rgba(255,253,249,.78);backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;gap:24px;padding:13px 22px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px}
.seal{width:38px;height:38px;border-radius:6px;background:var(--cinnabar);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:21px}
.brand b{font-family:var(--serif);font-size:21px;font-weight:500;letter-spacing:2px;display:block;line-height:1.2}
.brand i{font-style:normal;font-size:11.5px;color:var(--ink3);letter-spacing:.8px}
.site nav{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}
.site nav a{font-size:13.5px;color:var(--ink2);padding:6px 14px;border-radius:9px;border:1px solid transparent;transition:.15s}
.site nav a:hover{background:#fff;border-color:var(--line);color:var(--cinnabar)}

/* 面包屑 / 标题 */
.crumbs{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--ink3);padding:20px 0 14px;flex-wrap:wrap}
.crumbs a:hover{color:var(--cinnabar)}
.crumbs b{color:var(--ink2);font-weight:400}
.pagetitle{font-family:var(--serif);font-size:30px;font-weight:500;letter-spacing:1px;margin-bottom:10px}
.pagetitle em{font-size:14px;color:var(--ink3);font-family:var(--sans);letter-spacing:.5px;margin-left:8px}
.lead{font-size:14.5px;color:var(--ink2);margin-bottom:10px}
.lead.en{font-size:13.5px;color:var(--ink3)}
.lead b{font-weight:500;color:var(--ink)}

/* 首页 hero —— 左右分栏，左边文字右边焦点字 */
.hero2{display:grid;grid-template-columns:1fr 280px;gap:40px;align-items:center;padding:50px 0 34px}
.hero2-left h1{font-family:var(--serif);font-size:46px;font-weight:500;line-height:1.3;letter-spacing:2px;margin-bottom:16px}
.hero2-left h1 em{color:var(--cinnabar);display:block}
.kicker{font-size:12px;letter-spacing:3px;color:var(--cinnabar);margin-bottom:14px}
.hero2 .lead{max-width:520px;margin-bottom:22px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.solid,.ghost{font-family:var(--sans);font-size:14px;padding:10px 22px;border-radius:11px;cursor:pointer;transition:.15s;display:inline-block}
.solid{background:var(--cinnabar);border:1px solid var(--cinnabar);color:#fff}
.solid:hover{background:#a42e26}
.ghost{background:#fff;border:1px solid var(--line);color:var(--ink2)}
.ghost:hover{border-color:var(--cinnabar2);color:var(--cinnabar)}

/* 焦点字卡片 */
.spotcard{display:flex;flex-direction:column;align-items:center;gap:4px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px 20px 22px;text-decoration:none;transition:.2s;box-shadow:0 2px 12px rgba(120,100,70,.06)}
.spotcard:hover{border-color:var(--cinnabar);transform:translateY(-3px);box-shadow:0 6px 20px rgba(120,100,70,.1)}
.spotgrid{width:130px;height:130px;border:2px solid var(--cinnabar);border-radius:6px;position:relative;display:grid;place-items:center;background:#fffdf8;margin-bottom:6px}
.spotgrid::before,.spotgrid::after{content:"";position:absolute;opacity:.35}
.spotgrid::before{left:0;right:0;top:50%;height:1px;transform:translateY(-.5px);background:repeating-linear-gradient(to right,var(--cinnabar2) 0 4px,transparent 4px 8px)}
.spotgrid::after{top:0;bottom:0;left:50%;width:1px;transform:translateX(-.5px);background:repeating-linear-gradient(to bottom,var(--cinnabar2) 0 4px,transparent 4px 8px)}
.spotch{font-family:var(--kai);font-size:80px;line-height:1;color:var(--ink)}
.spotpy{font-size:20px;color:var(--cinnabar);letter-spacing:1px;font-weight:400}
.spotmean{font-size:12.5px;color:var(--ink2);text-align:center;line-height:1.6;max-width:210px}
.spotmeta{font-size:11px;color:var(--gold)}
.spotbtn{font-size:12.5px;color:var(--cinnabar);margin-top:8px}

/* 数据条 */
.statsbar{display:flex;gap:0;flex-wrap:wrap;border:1px solid var(--line);border-radius:14px;background:var(--card);margin-bottom:8px;overflow:hidden}
.statsbar span{flex:1;min-width:120px;text-align:center;padding:14px 10px;font-size:12.5px;color:var(--ink2);border-right:1px solid var(--line)}
.statsbar span:last-child{border-right:0}
.statsbar b{display:block;font-family:var(--serif);font-size:22px;color:var(--cinnabar);font-weight:500;margin-bottom:2px}

/* AI 对话预览 */
.chatpreview{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:12px 0;max-width:580px}
.cp-msg{display:flex;align-items:flex-start;gap:8px;margin-bottom:6px}
.cp-msg.cp-ai{margin-left:24px}
.cp-who{font-size:11px;color:var(--ink3);min-width:22px;padding-top:3px}
.cp-text{font-family:var(--kai);font-size:15.5px}
.cp-feedback{display:flex;flex-direction:column;gap:5px;margin-top:10px;padding:10px 13px;background:#fff;border:1px solid var(--line);border-radius:10px;border-left:3px solid var(--cinnabar)}
.cf-item{font-size:12px;color:var(--ink2);line-height:1.7}

/* 汉字卡片 —— 首页加大版 */
.chartgrid.big{grid-template-columns:repeat(auto-fill,minmax(176px,1fr));gap:14px}
.chartgrid.big .cc{font-size:52px}
.chartgrid.big .cm{min-height:2.6em}

@media(max-width:900px){
  .hero2{grid-template-columns:1fr;gap:24px;text-align:center;padding:36px 0 24px}
  .hero2-left h1{font-size:32px}
  .hero2 .lead{margin:0 auto 18px}
  .cta{justify-content:center}
  .spotcard{max-width:260px;margin:0 auto}
  .statsbar span{min-width:calc(50% - 1px);border-bottom:1px solid var(--line)}
}
@media(max-width:560px){
  .hero2-left h1{font-size:26px}
  .chartgrid.big{grid-template-columns:1fr 1fr}
}

/* 章节 */
.blk{padding:26px 0;border-bottom:1px solid var(--line)}
.blk:last-child{border-bottom:0}
.blk h2{font-family:var(--serif);font-size:19px;font-weight:500;margin-bottom:14px;display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}
.blk h2 em{font-size:12.5px;color:var(--ink3);font-family:var(--sans);letter-spacing:.4px}
.blk h2 .count{font-size:12px;color:var(--gold);font-family:var(--sans);margin-left:auto}
.blk h3.sub{font-size:13px;font-weight:500;color:var(--ink2);margin:16px 0 8px;display:flex;gap:7px;align-items:baseline}
.blk h3.sub em{font-size:11.5px;color:var(--ink3)}

/* 汉字头卡 */
.chead{display:flex;gap:26px;align-items:center;flex-wrap:wrap;padding-bottom:20px;border-bottom:1px solid var(--line)}
.grid{width:146px;height:146px;border:1.5px solid var(--cinnabar);border-radius:6px;position:relative;flex:none;background:#fffdf8}
.grid::before,.grid::after{content:"";position:absolute;opacity:.45}
.grid::before{left:0;right:0;top:50%;height:1px;transform:translateY(-.5px);background:repeating-linear-gradient(to right,var(--cinnabar2) 0 4px,transparent 4px 8px)}
.grid::after{top:0;bottom:0;left:50%;width:1px;transform:translateX(-.5px);background:repeating-linear-gradient(to bottom,var(--cinnabar2) 0 4px,transparent 4px 8px)}
.grid .ch{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--kai);font-size:90px;line-height:1}
.cinfo{flex:1;min-width:220px}
.cinfo h1{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.h1char{font-family:var(--kai);font-size:40px;font-weight:400}
.h1py{font-size:26px;color:var(--cinnabar);font-weight:400;letter-spacing:1px}
.pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.pill{font-size:11.5px;padding:3px 11px;border-radius:20px;background:#f3ede2;color:var(--ink2);border:1px solid var(--line)}
.pill.hot{background:#fbecea;color:var(--cinnabar);border-color:#f0d3cf}

/* 控件条 */
.controls{display:grid;gap:12px;padding:18px 0;border-bottom:1px solid var(--line);margin-bottom:6px}
.ctl{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.ctl .lbl{font-size:11.5px;color:var(--ink3);letter-spacing:.8px;min-width:132px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:#fff;color:var(--ink2);font-family:var(--sans);font-size:12.5px;padding:4px 12px;border-radius:20px;cursor:pointer;transition:.15s;line-height:1.6}
.chip:hover{border-color:var(--cinnabar2);color:var(--cinnabar)}
.chip.on{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}
.seg{display:flex;background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:2px}
.seg button{border:0;background:transparent;font-family:var(--sans);font-size:12.5px;color:var(--ink2);padding:4px 13px;border-radius:7px;cursor:pointer;transition:.15s}
.seg button.on{background:var(--cinnabar);color:#fff}
.tgl{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:12.5px;color:var(--ink2)}
.tgl input{appearance:none;width:34px;height:19px;background:#ddd6c9;border-radius:20px;position:relative;cursor:pointer;transition:.18s;flex:none}
.tgl input:checked{background:var(--cinnabar)}
.tgl input::after{content:"";position:absolute;top:2px;left:2px;width:15px;height:15px;background:#fff;border-radius:50%;transition:.18s}
.tgl input:checked::after{transform:translateX(15px)}

/* 注解 */
.anno{}
.anno .zh{color:var(--ink);font-size:15px}
.anno .tr{display:none;margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);font-size:13.5px;color:var(--ink2);line-height:1.7}
.anno .tr.rtl{text-align:right;font-family:var(--ar);font-size:14.5px;line-height:2}
/* 注解一直是「常显」——不做隐藏/悬停档：手机上没法悬停，而且用户会以为站点坏了 */
.anno .tr.on{display:block}
.modehint{font-size:12px;color:var(--ink3);background:#fffdf8;border:1px dashed var(--line);border-radius:10px;padding:8px 13px;line-height:1.7;margin-top:2px}
.modehint b{color:var(--cinnabar);font-weight:500}

/* 例句 / 拼音 */
.sentence{font-family:var(--kai);font-size:21px;line-height:2.7;letter-spacing:0}
.sentence ruby{margin-right:7px}
.sentence ruby:last-child{margin-right:0}
rt{font-size:10.5px;color:var(--gold);font-family:var(--sans);font-weight:400;letter-spacing:0}
body.nopy rt{display:none}
body.nopy .sentence ruby{margin-right:2px}

/* 朗读按钮 */
.speakrow{display:flex;gap:9px;flex-wrap:wrap;align-items:center;margin-top:12px}
.speak{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:5px 13px;font-family:var(--sans);font-size:12.5px;color:var(--ink2);cursor:pointer;transition:.15s;line-height:1.6}
.speak:hover{border-color:var(--cinnabar2);color:var(--cinnabar);background:#fffaf8}
.speak svg{width:14px;height:14px;flex:none}
.speak.playing{background:var(--cinnabar);border-color:var(--cinnabar);color:#fff}

/* 汉字卡片网格 */
.chartgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));gap:12px}
.ccard{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px;display:flex;flex-direction:column;gap:3px;transition:.15s}
.ccard:hover{background:#fff;border-color:var(--cinnabar);transform:translateY(-2px)}
.ccard .cc{font-family:var(--kai);font-size:40px;line-height:1.15}
.ccard .cp{font-size:13px;color:var(--cinnabar);letter-spacing:.5px}
.ccard .cm{font-size:11.5px;color:var(--ink3);line-height:1.6;min-height:2.4em}
.ccard .ct{font-size:11px;color:var(--gold);margin-top:2px}
.more{margin-top:14px;font-size:13.5px}
.more a{color:var(--cinnabar)}

/* 场景网格 */
.scenegrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:12px}
.scard{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:13px 15px;display:flex;flex-direction:column;gap:2px;transition:.15s}
.scard.play{background:#fff;border-color:#efd9d6;cursor:pointer}
.scard.play:hover{border-color:var(--cinnabar);transform:translateY(-2px)}
.scard .st{font-family:var(--serif);font-size:15.5px}
.scard .se{font-size:11.5px;color:var(--ink3)}
.scard .sm{font-size:11px;color:var(--gold);margin-top:4px}
.scard.play .st::after{content:"可试玩";font-size:9.5px;background:var(--gold);color:#fff;padding:1px 6px;border-radius:7px;margin-left:6px;vertical-align:2px}

/* 学习路径 */
.ladder{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.step{border:1px solid var(--line);border-radius:12px;padding:15px;background:var(--paper)}
.step.on{background:#fff;border-color:var(--cinnabar);box-shadow:0 0 0 3px #fbecea}
.step .lv{font-size:11px;letter-spacing:1.4px;color:var(--cinnabar)}
.step b{display:block;font-size:14.5px;font-weight:500;margin:5px 0 6px;font-family:var(--serif)}
.step p{font-size:11.8px;color:var(--ink2);line-height:1.65}
.howto{list-style:none}
.howto li{font-size:13.5px;color:var(--ink2);padding:7px 0 7px 18px;position:relative;line-height:1.75}
.howto li::before{content:"";position:absolute;left:0;top:16px;width:7px;height:7px;border-radius:50%;background:var(--cinnabar);opacity:.55}
.howto b{font-weight:500;color:var(--ink)}
.note{font-size:11.5px;color:var(--ink3);margin-top:14px;line-height:1.7}
.pager{display:flex;gap:12px;justify-content:space-between;padding-top:20px;margin-top:8px;border-top:1px solid var(--line);flex-wrap:wrap}
.pg{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:10px 16px;transition:.15s;min-width:150px}
.pg:hover{border-color:var(--cinnabar);background:#fff}
.pg.right{text-align:right}
.pg span{display:block;font-size:11px;color:var(--ink3)}
.pg b{font-family:var(--kai);font-size:17px;font-weight:400}

/* 对话 */
.chathead{padding-bottom:18px;border-bottom:1px solid var(--line)}
.chathead h1{font-family:var(--serif);font-size:26px;font-weight:500;margin-bottom:10px}
.chathead h1 em{font-size:13.5px;color:var(--ink3);font-family:var(--sans);margin-left:8px}
.chat{display:flex;flex-direction:column;gap:22px;padding:22px 0}
.round{display:flex;flex-direction:column;gap:14px}
.round[hidden]{display:none}
.msg{display:flex;flex-direction:column;gap:6px;max-width:94%}
.who{font-size:11px;color:var(--ink3);letter-spacing:.5px}
.bubble{border:1px solid var(--line);border-radius:14px;border-top-left-radius:5px;padding:13px 16px;background:#fff}
.bubble .sentence{font-size:19px;line-height:2.6}
.replies{display:flex;flex-direction:column;gap:9px;padding-left:14px}
.replies .hint{font-size:11.5px;color:var(--ink3)}
.reply{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 15px;cursor:pointer;transition:.15s;text-align:left}
.reply:hover{border-color:var(--cinnabar2);background:#fffaf8}
.reply.active{border-color:var(--cinnabar);background:#fffaf8}
.rtop{position:relative;padding-right:74px;cursor:pointer}
.rtoggle{position:absolute;right:0;top:2px;font-size:11px;line-height:1.9;color:var(--ink3);border:1px solid var(--line);border-radius:9px;padding:0 9px;background:#fff;transition:.15s}
.rtoggle::after{content:"看点评 ▾"}
.rtop:hover .rtoggle{border-color:var(--cinnabar2);color:var(--cinnabar)}
.reply.active .rtoggle{background:var(--cinnabar);color:#fff;border-color:var(--cinnabar)}
.reply.active .rtoggle::after{content:"收起 ▴"}
.collapse{justify-self:start;align-self:start;margin-top:2px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:5px 13px;font-family:var(--sans);font-size:12px;color:var(--ink2);cursor:pointer;transition:.15s}
.collapse:hover{border-color:var(--cinnabar2);color:var(--cinnabar)}
.rpy{font-size:12px;color:var(--gold);letter-spacing:.3px}
/* AI 回复里的整行拼音：必须是块级，否则会和汉字挤在同一行 */
.pyline2{display:block;font-size:12.5px;color:var(--gold);letter-spacing:.3px;margin-bottom:4px;line-height:1.5}
.bubble .sentence{display:block}
.rzh{font-family:var(--kai);font-size:17px}
.coach{margin-top:10px;display:grid;gap:9px}
.cc{border-left:3px solid var(--line);border-radius:10px;padding:10px 13px;background:var(--paper)}
.cc h4{font-size:12px;font-weight:500;margin-bottom:5px}
.cc p{font-size:13px;color:var(--ink2);line-height:1.7}
.cc p.tr{font-size:12.5px;color:var(--ink3);display:none;margin-top:5px}
.cc p.tr.on{display:block}
.cc-fix{border-left-color:#c0392b}.cc-fix h4{color:#a32d2d}
.cc-better{border-left-color:var(--gold)}.cc-better h4{color:#8a6a14}
.cc-culture{border-left-color:#1d9e75}.cc-culture h4{color:#0f6e56}
.chatfoot{padding-top:20px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:6px;align-items:flex-start}

/* ================= AI 自由对话 ================= */
.modebar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:16px 0 4px;border-top:1px solid var(--line);margin-top:6px}
.modebarNote{font-size:12px;color:var(--ink3);flex:1;min-width:200px}
.aimsgs{display:flex;flex-direction:column;gap:18px;padding:16px 0 4px;max-height:520px;overflow-y:auto}
.aimsgs:empty{display:none}
.aiinput{display:flex;gap:9px;padding:14px 0 4px;flex-wrap:wrap}
.aiinput input{flex:1;min-width:180px;border:1px solid var(--line);border-radius:11px;padding:11px 15px;font-family:var(--sans);font-size:14px;background:#fff;color:var(--ink)}
.aiinput input:focus{outline:none;border-color:var(--cinnabar2)}
.aiinput input:disabled{background:var(--paper);color:var(--ink3)}
.aiinput .solid{font-size:13.5px;padding:10px 20px}
.aiinput .solid:disabled{opacity:.5;cursor:default}
.thinking{display:flex;gap:6px;align-items:center;font-size:12.5px;color:var(--ink3);padding:6px 0}
.thinking i{width:6px;height:6px;border-radius:50%;background:var(--cinnabar2);display:block;animation:aiblink 1.1s infinite}
.thinking i:nth-child(2){animation-delay:.18s}
.thinking i:nth-child(3){animation-delay:.36s}
@keyframes aiblink{0%,60%,100%{opacity:.25}30%{opacity:1}}
@media (prefers-reduced-motion: reduce){.thinking i{animation:none;opacity:.6}}
.errmsg{background:#fdf3f1;border:1px solid #f0d9d5;border-radius:11px;padding:10px 14px;font-size:13px;color:#a32d2d;line-height:1.7}

/* 页脚 */
footer.site{border-top:1px solid var(--line);background:#fffdf9;margin-top:34px;padding:26px 0 40px;text-align:center}
.fnav{font-size:13px;margin-bottom:8px}
.fnav a{color:var(--cinnabar)}
.fline{font-size:12px;color:var(--ink2);margin-top:4px}
.fline.dim{color:var(--ink3);font-size:11px;max-width:640px;margin:8px auto 0;line-height:1.7}

/* 提示条 */
#toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(14px);background:#1e1a15;color:#fff;font-size:13px;padding:10px 18px;border-radius:11px;opacity:0;pointer-events:none;transition:.25s;z-index:99;max-width:min(520px,88vw);line-height:1.6}
#toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:900px){
  .hero h1{font-size:32px}
  .ladder{grid-template-columns:1fr 1fr}
  .ctl .lbl{min-width:auto;width:100%}
  .card{padding:20px 16px}
  .grid{width:120px;height:120px}
  .grid .ch{font-size:72px}
  .h1char{font-size:34px}.h1py{font-size:22px}
}
@media(max-width:560px){
  .chead{flex-direction:column;align-items:flex-start}
  .ladder{grid-template-columns:1fr}
  .chartgrid{grid-template-columns:1fr 1fr}
  .scenegrid{grid-template-columns:1fr}
  .site nav{margin-left:0;width:100%}
  .bar{padding:11px 16px;gap:12px}
  .wrap{padding:0 16px}
  .replies{padding-left:0}
}