:root{
  --bg:#f2f2f7; --card:#fff; --ink:#1c1c1e; --ink2:#3a3a3c; --ink3:#545458;
  --line:#e2e2e7; --blue:#007aff; --blue-d:#0062cc; --own:#a84f00; --own-bg:#fff1df;
  --green:#248a3d; --green-bg:#e6f5ea; --red:#c4271b; --red-bg:#fdecea;
  --r:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",sans-serif}
a{color:var(--blue);text-decoration:none}
.top{position:sticky;top:0;z-index:10;background:rgba(242,242,247,.86);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
.top-in{max-width:880px;margin:0 auto;padding:12px 16px 6px;display:flex;align-items:center;gap:12px}
.brand{flex:1;min-width:0}
.brand .t{font-weight:700;font-size:19px;letter-spacing:.2px}
.brand .s{font-size:12.5px;color:var(--ink3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rc-toggle{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink2);cursor:pointer;user-select:none;flex-shrink:0}
.rc-toggle input{display:none}
.rc-toggle i{width:46px;height:28px;border-radius:14px;background:#d1d1d6;position:relative;transition:.2s}
.rc-toggle i:after{content:"";position:absolute;left:2px;top:2px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 2px 4px rgba(0,0,0,.2);transition:.2s}
.rc-toggle input:checked+i{background:#34c759}
.rc-toggle input:checked+i:after{left:20px}
.tabs{max-width:880px;margin:0 auto;padding:4px 12px 10px;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs a{flex-shrink:0;padding:6px 14px;border-radius:999px;font-size:14.5px;color:var(--ink2);background:rgba(118,118,128,.12)}
.tabs a.on{background:var(--blue);color:#fff;font-weight:600}
main{max-width:880px;margin:0 auto;padding:14px 16px 40px;overflow-wrap:anywhere}
h2{font-size:22px;margin:26px 4px 10px}
h2:first-child{margin-top:6px}
h3{font-size:15px;color:var(--ink3);font-weight:600;margin:22px 6px 8px;letter-spacing:.3px}
.lead{margin:0 6px 12px;color:var(--ink2);font-size:15px}
.group{background:var(--card);border-radius:var(--r);overflow:hidden;margin-bottom:14px}
.group>.row{padding:13px 16px;border-top:1px solid var(--line)}
.group>.row:first-child{border-top:0}
.row b{font-weight:600}
.muted{color:var(--ink3);font-size:14px}
/* 卡片 */
.card{background:var(--card);border-radius:var(--r);padding:14px 16px 12px;margin-bottom:12px;scroll-margin-top:120px;position:relative}
.card.flash{animation:flash 1.4s}
@keyframes flash{0%,40%{box-shadow:0 0 0 3px var(--blue)}100%{box-shadow:0 0 0 0 transparent}}
.card .hd{display:flex;align-items:baseline;gap:8px;margin-bottom:6px}
.card .slot{font-weight:600;font-size:15px;flex:1}
.pg{font-size:12px;color:var(--ink3);background:var(--bg);border-radius:6px;padding:1px 7px;flex-shrink:0}
.en{font-family:"New York","Iowan Old Style",Georgia,"Times New Roman",serif;font-size:18.5px;line-height:1.55;color:var(--ink);white-space:pre-line;margin:2px 0 4px}
.zh{color:var(--ink2);font-size:15px;white-space:pre-line}
.blank{color:var(--own);background:var(--own-bg);border-radius:5px;padding:0 4px;font-family:-apple-system,"PingFang SC",sans-serif;font-size:.86em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.fill{margin-top:8px;font-size:14.5px;color:var(--ink2);background:#f7f7fa;border-radius:10px;padding:8px 11px}
.fill:before{content:"怎么填　";font-weight:600;color:var(--ink)}
.tip{margin-top:8px;font-size:14px;color:var(--ink2)}
details.diff{margin-top:8px;font-size:14px}
details.diff summary{cursor:pointer;color:var(--blue);list-style:none;font-size:13.5px}
details.diff summary::-webkit-details-marker{display:none}
details.diff summary:before{content:"▸ "}
details.diff[open] summary:before{content:"▾ "}
.orig{margin:6px 0 4px;padding:8px 11px;background:var(--red-bg);border-radius:10px;color:#5a1a14}
.orig:before{content:"原书　";font-weight:600;color:var(--red)}
.why{padding:0 2px;color:var(--ink2)}
/* 背诵模式 */
body.recite .card .en,body.recite .all-en{filter:blur(7px);user-select:none;cursor:pointer;transition:filter .15s}
body.recite .card.show .en,body.recite li.show .all-en{filter:none}
body.recite .card .hint{display:block}
.hint{display:none;font-size:12px;color:var(--ink3);margin-top:2px}
/* 分段控件 */
.seg{display:flex;background:rgba(118,118,128,.12);border-radius:10px;padding:2px;margin:0 0 12px}
.seg button{flex:1;border:0;background:none;font:inherit;font-size:14.5px;padding:7px 4px;border-radius:8px;color:var(--ink);cursor:pointer}
.seg button.on{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.12);font-weight:600}
/* 总图 */
.map{display:grid;gap:10px}
.mp{background:var(--card);border-radius:var(--r);padding:12px 14px}
.mp .pn{font-weight:700;margin-bottom:6px}
.mp ol{margin:0;padding-left:0;list-style:none;counter-reset:a}
.mp li{display:flex;gap:10px;align-items:baseline;padding:6px 0;border-top:1px solid var(--line)}
.mp li:first-child{border-top:0}
.mp li .n{flex:1}
.tag{font-size:12px;border-radius:6px;padding:1px 7px;flex-shrink:0}
.tag.bei{background:#e5f0ff;color:var(--blue-d)}
.tag.xie{background:var(--own-bg);color:var(--own)}
/* 表格 */
table.t{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--r);overflow:hidden;font-size:15px;margin-bottom:12px}
table.t td,table.t th{padding:9px 12px;border-top:1px solid var(--line);text-align:left;vertical-align:top}
table.t tr:first-child td,table.t tr:first-child th{border-top:0}
table.t th{background:#f7f7fa;font-weight:600;font-size:14px}
table.t .e{font-family:Georgia,"Times New Roman",serif;font-size:16.5px}
.rs{background:var(--card);border-radius:var(--r);padding:12px 16px;margin-bottom:10px}
.rs .rh{font-weight:700;margin-bottom:4px}
.rs .ri{display:flex;gap:10px;padding:5px 0;border-top:1px solid var(--line);align-items:baseline}
.rs .ri:first-of-type{border-top:0}
.rs .ri .e{flex:1;font-family:Georgia,"Times New Roman",serif;font-size:16.5px}
.rs .note{font-size:13.5px;color:var(--ink3);margin-top:4px}
/* 示范 */
.ex{background:var(--card);border-radius:var(--r);padding:14px 16px;margin-bottom:16px}
.ex .xt{font-weight:700;font-size:17px;margin-bottom:6px}
.ex .meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.badge{font-size:12.5px;border-radius:6px;padding:2px 8px;background:var(--bg);color:var(--ink2)}
.badge.ok{background:var(--green-bg);color:var(--green)}
.ex details{font-size:14px;margin-bottom:8px}
.ex details summary{cursor:pointer;color:var(--blue)}
.ex .dir{font-family:Georgia,serif;font-size:15px;color:var(--ink2);margin:6px 0;background:#f7f7fa;border-radius:10px;padding:8px 11px}
.ex .pic{font-size:14.5px;color:var(--ink2);margin:0 0 10px;background:#f7f7fa;border-radius:10px;padding:8px 11px}
.essay{font-family:"New York","Iowan Old Style",Georgia,"Times New Roman",serif;font-size:17.5px;line-height:1.75;border-left:3px solid var(--line);padding-left:12px}
.essay p{margin:0 0 10px;white-space:pre-line}
.essay p.c{text-align:center;font-weight:600}
.sent{cursor:pointer;border-radius:4px}
.sent:hover{background:#eef4ff}
.sent.sel{background:#e5f0ff}
.own{color:var(--own);background:var(--own-bg);border-radius:4px;padding:0 2px}
.sent.free .own{background:#ffe7c7}
.legend{font-size:13.5px;color:var(--ink2);margin:0 0 10px}
.legend .own{font-family:inherit}
.which{font-size:13.5px;color:var(--blue-d);background:#eef4ff;border-radius:10px;padding:7px 11px;margin:-2px 0 10px;display:none}
.which.on{display:block}
.xnote{font-size:14.5px;color:var(--ink2);background:#f7f7fa;border-radius:10px;padding:8px 11px;margin-top:6px}
.xnote:before{content:"这篇怎么套　";font-weight:600;color:var(--ink)}
/* 一页背完 */
.prog{display:flex;align-items:center;gap:10px;margin:0 6px 12px;font-size:14.5px;color:var(--ink2)}
.prog .bar{flex:1;height:6px;background:#e5e5ea;border-radius:3px;overflow:hidden}
.prog .bar i{display:block;height:100%;background:#34c759;transition:width .2s}
ol.all{list-style:none;margin:0 0 14px;padding:0;background:var(--card);border-radius:var(--r);overflow:hidden}
ol.all li{display:flex;gap:10px;padding:11px 14px;border-top:1px solid var(--line);align-items:flex-start}
ol.all li:first-child{border-top:0}
ol.all .no{font-size:12.5px;color:var(--ink3);width:22px;flex-shrink:0;padding-top:4px}
ol.all .bd{flex:1;min-width:0}
ol.all .lab{font-size:12.5px;color:var(--ink3)}
ol.all .all-en{font-family:Georgia,"Times New Roman",serif;font-size:16.5px;white-space:pre-line}
ol.all .all-zh{font-size:14px;color:var(--ink2)}
.ck{width:26px;height:26px;border-radius:50%;border:2px solid #c7c7cc;background:#fff;flex-shrink:0;cursor:pointer;margin-top:2px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;padding:0}
.ck.on{background:#34c759;border-color:#34c759}
.btn{border:0;background:rgba(118,118,128,.12);color:var(--ink);font:inherit;font-size:14px;padding:6px 12px;border-radius:999px;cursor:pointer}
/* 改动 */
.df{background:var(--card);border-radius:var(--r);padding:12px 16px;margin-bottom:10px}
.df .dh{font-weight:600;margin-bottom:4px}
.df .now{margin:6px 0 4px;padding:8px 11px;background:var(--green-bg);border-radius:10px;color:#123d1d;font-family:Georgia,serif}
.df .now:before{content:"这里　";font-weight:600;color:var(--green);font-family:-apple-system,"PingFang SC",sans-serif}
.df .orig{font-family:Georgia,serif}
.df .orig:before{font-family:-apple-system,"PingFang SC",sans-serif}
.foot{max-width:880px;margin:0 auto;padding:0 20px 40px;font-size:13px;color:var(--ink3)}
@media (max-width:560px){
  .brand .t{font-size:17px}
  .en{font-size:17.5px}
  .essay{font-size:16.5px}
  main{padding:12px 12px 40px}
  .card,.ex{padding:13px 14px}
}