:root{
  --bg:#f2f0e9;--panel:#fbfaf6;--panel-a:rgba(251,250,246,.92);--soft:#efece4;--soft2:#e7e3d8;--line:#e2ddd0;--line2:#ebe7dd;
  --ink:#343a3b;--ink2:#56605e;--muted:#80877f;
  --brand:#3f7f73;--brand-2:#356b61;--brand-soft:#e1ede8;--brand-line:#c3d9d0;--brand-rgb:63,127,115;
  --grad:linear-gradient(135deg,#4b8c7f,#62a090);--accent:#c98a4b;--accent-soft:#f6ead9;
  --seal:#3f7f73;--ai:#3f7f73;--ai-bg:#e6f0ec;
  --ok:#3f8a5a;--ok-bg:#e5f1e7;--warn:#9c6c1f;--warn-bg:#f7eedb;--err:#b04f47;--err-bg:#f7e5e2;
  --shadow-rgb:62,58,45;--radius:20px;--radius-sm:14px;
  --shadow:0 1px 2px rgba(var(--shadow-rgb),.04),0 6px 20px rgba(var(--shadow-rgb),.05);
  --mask:rgba(40,38,30,.35);
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#1b2022;--panel:#22292b;--panel-a:rgba(34,41,43,.92);--soft:#283033;--soft2:#2f383b;--line:#343d40;--line2:#2b3336;
  --ink:#d6dbd8;--ink2:#b3bbb7;--muted:#8a938e;
  --brand:#86bdae;--brand-2:#9ccabd;--brand-soft:#2a3b37;--brand-line:#3d5750;--brand-rgb:134,189,174;
  --grad:linear-gradient(135deg,#467f73,#558f81);--accent:#d8a46e;--accent-soft:#3a3226;
  --seal:#4f8f80;--ai:#6fae9e;--ai-bg:#26352f;
  --ok:#7fbf91;--ok-bg:#24352a;--warn:#d9b06a;--warn-bg:#3a3222;--err:#e08a80;--err-bg:#3d2826;
  --shadow-rgb:0,0,0;--shadow:0 1px 2px rgba(0,0,0,.2),0 6px 20px rgba(0,0,0,.18);
  --mask:rgba(0,0,0,.5);
  color-scheme:dark;
}

*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:14px/1.65 -apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand-2);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{margin:0 0 .5em;line-height:1.3}
h1{font-size:24px;font-weight:700;letter-spacing:.01em}
h2{font-size:18px}h3{font-size:15px}
.muted{color:var(--muted)}.small{font-size:12px}.center{text-align:center}.right{text-align:right}.nowrap{white-space:nowrap}.grow{flex:1}
.good{color:var(--ok)}.bad{color:var(--err)}
.shell{display:flex;min-height:100vh}
.side{width:232px;flex:none;background:var(--panel);border-right:1px solid var(--line);color:var(--ink);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow:auto}
.brand{display:flex;align-items:center;gap:10px;padding:20px 20px 16px;color:var(--ink);font-weight:700;font-size:16px;letter-spacing:.04em}
.brand:hover{text-decoration:none}
.mark{display:inline-grid;place-items:center;width:32px;height:32px;background:var(--grad);color:#fff;border-radius:10px;font-size:16px;box-shadow:0 4px 10px rgba(var(--brand-rgb),.3)}
.brand.big{justify-content:center;font-size:22px;color:var(--brand);padding:0 0 6px}.brand.big .mark{width:40px;height:40px;font-size:22px}
.side nav{flex:1;padding:4px 10px}
.side nav a{display:block;color:var(--ink2);padding:8px 12px;border-radius:12px;margin:2px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side nav a small{display:block;font-size:11px;color:var(--muted);line-height:1.2}
.side nav a:hover{background:var(--soft);text-decoration:none}
.side nav a.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
.nav-h{font-size:11px;color:var(--muted);padding:16px 12px 4px;letter-spacing:.08em}
.logout{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-top:1px solid var(--line);font-size:13px}
.logout .link{color:var(--muted)}
.main{flex:1;min-width:0;padding:28px 36px 80px;max-width:1440px}
.menu-btn{display:none}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:16px;flex-wrap:wrap}
.page-head.sub{margin-top:4px}
.head-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.crumb{font-size:12px;color:var(--muted);margin-bottom:4px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:18px;overflow-x:auto}
.tabs a{padding:9px 14px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap;margin-bottom:-1px}
.tabs a:hover{color:var(--ink);text-decoration:none}
.tabs a.on{color:var(--brand);border-color:var(--brand);font-weight:600}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:16px;box-shadow:var(--shadow)}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.card-head h3{margin:0}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.course-card{display:block;color:var(--ink);transition:transform .12s,box-shadow .12s}
.course-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 6px 18px rgba(var(--shadow-rgb),.09)}
.cc-top{display:flex;justify-content:space-between;gap:8px;margin-bottom:10px}.cc-top b{font-size:16px}
.cc-stats{display:flex;gap:16px;color:var(--muted);font-size:13px}.cc-stats b{color:var(--ink);font-size:18px;margin-right:2px}
.cc-check{margin-top:10px;display:flex;gap:10px;font-size:12px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.layout-side{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:16px;align-items:start}
.layout-side.wide{grid-template-columns:minmax(0,1fr) 320px}
.sticky{position:sticky;top:16px}
.sec{margin:24px 0 12px}
.hero{padding:28px 32px}.hero p{max-width:760px}
.steps{padding-left:20px;max-width:760px}.steps li{margin:6px 0}
.empty{text-align:center;padding:40px}
/* forms */
.form label{display:block;margin-bottom:12px;font-weight:500}
.form label small{font-weight:400}
input,select,textarea{font:inherit;color:inherit;border:1px solid var(--line);border-radius:10px;padding:8px 12px;background:var(--panel);width:100%;transition:border-color .15s,box-shadow .15s}
textarea{resize:vertical;line-height:1.55}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand-line);box-shadow:0 0 0 4px rgba(var(--brand-rgb),.12)}
.form label>input,.form label>select,.form label>textarea{margin-top:4px}
input[type=checkbox],input[type=radio]{width:auto}
.row2,.row3,.row4,.row5{display:grid;gap:12px}
.row2{grid-template-columns:1fr 1fr}.row3{grid-template-columns:2fr 1fr 1fr}.row4{grid-template-columns:repeat(4,1fr)}.row5{grid-template-columns:80px 2fr 2fr 150px 110px}
.row5 .span2{grid-column:span 1}
.row2.tight{gap:8px;margin-top:8px}
.narrow{max-width:520px}
.actions{display:flex;gap:10px;align-items:center;margin-top:12px;flex-wrap:wrap}
.inline{display:inline-flex;gap:6px;align-items:center;flex-wrap:wrap}
.inline input,.inline select{width:auto}
.filters input{width:140px}
.radio{display:inline-flex!important;align-items:center;gap:5px;margin-right:14px;font-weight:400!important}
.status-row{color:var(--muted);font-size:13px}
.weekdays{display:flex;flex-wrap:wrap;gap:4px 10px;margin-bottom:12px}.weekdays label{font-weight:400;margin:0;display:flex;gap:4px;align-items:center}
.w-input{width:80px}
.inline-label{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.sm-select{width:auto}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:500;border:1px solid var(--brand-line);background:var(--panel);color:var(--brand);padding:8px 18px;border-radius:999px;cursor:pointer;white-space:nowrap;text-decoration:none!important;transition:all .15s}
.btn:hover{background:var(--brand-soft)}
.btn.primary{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 4px 12px rgba(var(--brand-rgb),.28)}.btn.primary:hover{filter:brightness(1.06);background:var(--grad)}
.btn.primary-soft{background:var(--brand-soft);border-color:transparent}
.btn.ghost{border-color:var(--line);color:var(--ink)}.btn.ghost:hover{background:var(--soft)}
.btn.ai{background:var(--ai);border-color:var(--ai);color:#fff}.btn.ai:hover{background:#0b5f58}
.btn.danger{background:var(--err);border-color:var(--err);color:#fff}
.btn.sm{padding:5px 13px;font-size:13px}
.btn.block{display:flex;width:100%;margin-bottom:8px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.link{background:none;border:0;padding:0;color:var(--brand-2);cursor:pointer;font:inherit}
.danger-text{color:var(--err)!important}
.ibtn{border:0;background:none;cursor:pointer;color:var(--muted);font-size:14px;padding:2px 4px;border-radius:4px}.ibtn:hover{background:var(--line2);color:var(--ink)}.ibtn.del:hover{color:var(--err)}
.danger-zone{margin-top:24px;text-align:right}
/* tables */
.tbl{width:100%;border-collapse:collapse}
.tbl th,.tbl td{border-bottom:1px solid var(--line2);padding:8px 8px;text-align:left;vertical-align:top}
.tbl th{font-weight:600;color:var(--muted);font-size:12px;background:var(--soft);border-bottom:1px solid var(--line)}
.tbl.small td,.tbl.small th{padding:5px 6px;font-size:12.5px}
.tbl.edit td{padding:6px 4px}
.tbl.lessons tbody tr:hover{background:var(--soft)}
.tbl.grid td,.tbl.grid th{text-align:center}.tbl.grid td:first-child,.tbl.grid th:first-child{text-align:left}
.tbl.grid td.target{background:var(--brand-soft);font-weight:600}
.tbl.grid td.gap{background:var(--err-bg);outline:1px solid var(--err)}
.tbl.matrix select{width:58px;padding:3px}
.lv-H{background:var(--brand);color:#fff}.lv-M{background:var(--brand-line)}.lv-L{background:var(--brand-soft)}
.scroll-x{overflow-x:auto}
.segs{min-width:820px}.segs textarea{min-width:170px}
.segs td{padding:6px 4px}
.segs select{margin-bottom:4px}.segs .mins{width:64px}
.handle{white-space:nowrap}.handle .ibtn{display:block}
/* tags & status */
.tag{display:inline-block;padding:1px 9px;border-radius:20px;background:var(--soft);color:var(--ink2);font-size:12px;margin-right:4px;font-weight:500;vertical-align:middle}
.tag.sm{font-size:11px;padding:0 7px}
.b1,.b2{background:var(--soft)}.b3{background:var(--ok-bg);color:var(--ok)}.b4{background:var(--warn-bg);color:var(--warn)}.b5{background:var(--err-bg);color:var(--err)}.b6{background:var(--soft2);color:var(--ink2)}
.st{font-size:12px;padding:1px 8px;border-radius:20px}
.st-draft{background:var(--soft);color:#7b7466}.st-ready{background:var(--brand-soft);color:var(--brand)}.st-taught{background:var(--ok-bg);color:var(--ok)}
.pill{display:inline-block;font-size:11px;padding:1px 8px;border-radius:20px;background:var(--soft);color:var(--ink2)}
.pill.ok{background:var(--ok-bg);color:var(--ok)}.pill.bad{background:var(--err-bg);color:var(--err)}
.ok-dot,.warn-dot,.err-dot{font-size:12px;display:inline-flex;align-items:center;gap:4px;margin-right:6px}
.ok-dot:before,.warn-dot:before,.err-dot:before{content:"";width:8px;height:8px;border-radius:50%}
.ok-dot{color:var(--ok)}.ok-dot:before{background:var(--ok)}
.warn-dot{color:var(--warn)}.warn-dot:before{background:var(--warn)}
.err-dot{color:var(--err)}.err-dot:before{background:var(--err)}
.ok-line{color:var(--ok);background:var(--ok-bg);padding:8px 12px;border-radius:7px;margin:0}
/* checks */
.checks{list-style:none;padding:0;margin:0}
.checks li{padding:9px 12px 9px 32px;border-radius:12px;margin-bottom:6px;position:relative;font-size:13px;line-height:1.5}
.checks li:before{position:absolute;left:10px;top:8px;font-weight:700}
.checks .error{background:var(--err-bg);color:#7a1a12}.checks .error:before{content:"✕";color:var(--err)}
.checks .warn{background:var(--warn-bg);color:#6b4106}.checks .warn:before{content:"!";color:var(--warn);left:13px}
.checks .info{background:var(--soft);color:var(--ink2)}.checks .info:before{content:"i";color:var(--muted);left:13px;font-style:italic}
/* flash */
.flash{padding:10px 16px;border-radius:12px;margin-bottom:14px;background:var(--ok-bg);color:var(--ok);border:1px solid var(--line);word-break:break-all}
.flash.err{background:var(--err-bg);color:var(--err);border-color:var(--line)}
/* lesson */
.obj-checks{display:grid;gap:6px;margin-bottom:12px}
.obj-check{display:flex!important;gap:8px;align-items:flex-start;font-weight:400!important;padding:8px 10px;border:1px solid var(--line2);border-radius:8px;margin:0!important;cursor:pointer}
.obj-check:has(input:checked){border-color:var(--brand-line);background:var(--brand-soft)}
.obj-check input{margin-top:4px}
.ai-box{border:1px dashed var(--brand-line);background:var(--ai-bg);border-radius:8px;padding:10px 14px}
.ai-box summary{cursor:pointer;color:var(--ai);font-weight:600}
.ai-box textarea{margin:10px 0 8px;background:var(--panel)}
.time-sum{font-size:13px;padding:4px 10px;border-radius:20px}
.time-sum.ok{background:var(--ok-bg);color:var(--ok)}.time-sum.bad{background:var(--err-bg);color:var(--err)}
.savebar{position:sticky;bottom:0;background:var(--panel-a);backdrop-filter:blur(4px);padding:12px 0;display:flex;justify-content:flex-end;align-items:center;gap:14px;border-top:1px solid var(--line);z-index:5}
.tools .btn{margin-bottom:8px}
.evi{margin-top:4px}
.evidence{margin-top:10px;font-size:12.5px}
.evidence div{margin:4px 0}
.ai-result{margin-top:10px;font-size:13px;background:#fbfaf7;border:1px solid var(--line2);border-radius:8px;padding:10px 12px}
.ai-result h4{margin:8px 0 4px;font-size:13px}
.ai-result ul{margin:4px 0;padding-left:18px}
.score-badge{display:inline-block;background:var(--brand);color:#fff;border-radius:6px;padding:0 8px;font-weight:700;margin-right:6px}
/* questions */
.qlist .q{border-top:1px solid var(--line2);padding:12px 0}
.q-meta{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-bottom:6px}
.q-stem{white-space:normal}.q-opts{color:var(--ink2);margin:4px 0 4px 1em;font-size:13px}
.q-ans{font-size:13px;background:var(--soft);padding:8px 10px;border-radius:6px;margin-top:4px}
.aiq-item{border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin-top:10px;background:var(--panel)}
.aiq-item label{display:flex;gap:8px;font-weight:500}
.pick-list{max-height:360px;overflow:auto;border:1px solid var(--line2);border-radius:8px;padding:6px}
.pick{display:block!important;font-weight:400!important;padding:5px 6px;margin:0!important;border-radius:5px;font-size:13px}
.pick:hover{background:var(--soft)}
/* stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:16px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:26px}
.stat span{color:var(--muted);font-size:12px}
.stat.bad b{color:var(--err)}.stat.good b{color:var(--ok)}
.bar-row{display:grid;grid-template-columns:56px 1fr 34px;gap:8px;align-items:center;margin:6px 0;font-size:13px}
.bar{height:12px;background:var(--line2);border-radius:6px;position:relative;overflow:visible}
.bar i{display:block;height:100%;background:var(--brand-2);border-radius:6px}
.bar i.low{background:var(--err)}
.attain{display:grid;grid-template-columns:1fr 44px;gap:8px;align-items:center}
.attain em{position:absolute;top:-3px;bottom:-3px;width:2px;background:var(--ink);opacity:.55}
.chain{white-space:pre-wrap;background:var(--brand-soft);border-left:3px solid var(--brand);padding:10px 14px;border-radius:4px;font-family:inherit}
.prose{max-width:900px}.prose li{margin:5px 0}
.add-user{margin-top:14px}.add-user input{width:160px}
/* slides */
.gen-bar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.gen-left{display:flex;gap:10px;flex:1;min-width:300px;align-items:center}
.gen-right{display:flex;gap:8px;flex-wrap:wrap}
.deck{display:grid;grid-template-columns:230px minmax(0,1fr);gap:16px;align-items:start}
.deck-list{padding:8px;max-height:calc(100vh - 120px);overflow:auto;position:sticky;top:16px}
.thumb{display:flex;gap:8px;padding:7px 8px;border-radius:7px;cursor:pointer;font-size:12.5px;align-items:flex-start;border:1px solid transparent}
.thumb:hover{background:var(--soft)}
.thumb.on{background:var(--brand-soft);border-color:var(--brand-line)}
.thumb .n{color:var(--muted);width:18px;flex:none;text-align:right}
.thumb .t{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.thumb .ph{font-size:10px;color:var(--muted)}
.deck-tools{display:flex;gap:4px;padding:6px 4px;border-top:1px solid var(--line2);margin-top:6px;flex-wrap:wrap}
.preview-wrap{margin-bottom:14px}
.slide-preview{aspect-ratio:16/9;width:100%;border-radius:8px;overflow:hidden;box-shadow:0 4px 20px rgba(var(--shadow-rgb),.15);position:relative;container-type:inline-size}
.sp{position:absolute;inset:0;padding:6cqw 7cqw;display:flex;flex-direction:column}
.sp .bar-top{position:absolute;left:0;top:0;right:0;height:1.4cqw}
.sp h2{font-size:3.6cqw;margin:0 0 2.5cqw;font-weight:700}
.sp ul{margin:0;padding-left:3cqw;font-size:2.3cqw;line-height:1.75}
.sp .cover{margin:auto 0}.sp .cover h1{font-size:5.4cqw;margin:0 0 1.6cqw}.sp .cover p{font-size:2.4cqw;margin:0;opacity:.8}
.sp .cols{display:grid;grid-template-columns:1fr 1fr;gap:3cqw;flex:1}
.sp .col{border-radius:1cqw;padding:2cqw 2.4cqw}.sp .col h3{font-size:2.4cqw;margin:0 0 1cqw}
.sp .q{font-size:2.6cqw;margin-bottom:2cqw}.sp .opt{font-size:2.2cqw;padding:1cqw 2cqw;border-radius:1cqw;margin-bottom:1.2cqw}
.sp .foot{position:absolute;left:7cqw;right:7cqw;bottom:2.4cqw;font-size:1.4cqw;opacity:.55;display:flex;justify-content:space-between}
.sp.section{justify-content:center}.sp.section h2{font-size:5cqw}
/* auth */
.auth-body{display:grid;place-items:center;min-height:100vh;background:radial-gradient(1200px 600px at 10% -10%,var(--brand-soft),transparent),radial-gradient(900px 500px at 110% 110%,var(--soft),transparent),var(--soft)}
.auth-card{width:min(400px,92vw);background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:36px;box-shadow:0 20px 60px rgba(var(--brand-rgb),.10);text-align:left}
.auth-card>p.muted{text-align:center;margin:0 0 20px;font-size:13px}
.list{list-style:none;padding:0;margin:0}
.list li{display:flex;justify-content:space-between;align-items:center;padding:7px 0;border-bottom:1px solid var(--line2);gap:8px}
.list .date{display:inline-block;min-width:46px;color:var(--muted);font-variant-numeric:tabular-nums}
/* busy */
.busy{position:fixed;inset:0;background:var(--mask);display:grid;place-items:center;z-index:100}
.busy[hidden]{display:none}
.busy-box{background:var(--panel);padding:24px 32px;border-radius:12px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,.2)}
.busy-box small{color:var(--muted)}
.spin{width:34px;height:34px;border:3px solid var(--ai-bg);border-top-color:var(--ai);border-radius:50%;margin:0 auto 10px;animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:8px;z-index:200;font-size:13px;max-width:90vw}
.toast.err{background:var(--err)}
@media (max-width:1100px){.layout-side,.layout-side.wide{grid-template-columns:1fr}.sticky{position:static}.deck{grid-template-columns:1fr}.deck-list{position:static;max-height:220px}}
@media (max-width:820px){
  .side{position:fixed;left:-240px;z-index:50;transition:left .2s}.side.open{left:0}
  .main{padding:16px 16px 80px}
  .menu-btn{display:inline-block;border:1px solid var(--line);background:var(--panel);border-radius:6px;padding:4px 10px;margin-bottom:10px;font-size:16px}
  .grid2,.row2,.row3,.row4,.row5{grid-template-columns:1fr}
}
@media print{.side,.tabs,.savebar,.head-actions,.menu-btn{display:none}.main{padding:0}}
.card-sum{cursor:pointer;list-style:none}.card-sum::-webkit-details-marker{display:none}.card-sum:before{content:"▸ ";color:var(--muted)}details[open]>.card-sum:before{content:"▾ "}.user-edit input,.user-edit select{padding:5px 8px}

/* ================= 手机端 ================= */
.m-bar{display:none}
.nav-mask{display:none}
.m-only{display:none!important}
@media (max-width:820px){
  body{font-size:15px}
  .main{padding:0 14px 90px}
  .m-bar{display:flex;align-items:center;gap:10px;position:sticky;top:0;z-index:40;margin:0 -14px 14px;padding:10px 14px;background:var(--panel-a);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .m-bar .brand{padding:0;font-size:15px}
  .m-bar .mark{width:28px;height:28px;font-size:14px;border-radius:9px}
  .menu-btn{display:grid!important;place-items:center;width:38px;height:38px;margin:0;border:1px solid var(--line);background:var(--panel);border-radius:12px;font-size:18px;padding:0}
  .side{position:fixed;left:0;top:0;bottom:0;z-index:60;transform:translateX(-105%);transition:transform .22s ease;box-shadow:10px 0 40px rgba(0,0,0,.12);width:260px}
  body.nav-open .side{transform:none}
  body.nav-open .nav-mask{display:block;position:fixed;inset:0;background:var(--mask);z-index:55}
  .side nav a{padding:11px 14px;font-size:15px}
  h1{font-size:21px}
  .page-head{margin-bottom:12px}
  .head-actions{width:100%}
  .card{padding:14px 15px;border-radius:14px}
  input,select,textarea{font-size:16px}
  .btn{padding:9px 16px}
  .btn.sm{padding:7px 13px}
  .tabs{margin:0 -14px 14px;padding:0 14px;scrollbar-width:none}
  .tabs a{padding:10px 12px}
  .layout-side,.layout-side.wide,.grid2,.row2,.row3,.row4,.row5{grid-template-columns:minmax(0,1fr)!important}
  .stats{grid-template-columns:1fr 1fr}
  .stat b{font-size:22px}
  .tbl th,.tbl td{padding:7px 6px}
  .savebar{margin:0 -14px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));position:sticky;bottom:0}
  .savebar .btn{flex:1}
  .toast{bottom:calc(20px + env(safe-area-inset-bottom))}
  .flash{font-size:14px}
  /* 教学环节表 → 卡片 */
  .segs{min-width:0!important}
  .segs thead{display:none}
  .segs,.segs tbody,.segs tr,.segs td{display:block;width:100%}
  .segs tr.seg{position:relative;border:1px solid var(--line);border-radius:14px;padding:10px 12px;margin-bottom:10px;background:var(--panel)}
  .segs td{border:0;padding:4px 0}
  .segs td[data-l]:before{content:attr(data-l);display:block;font-size:12px;color:var(--muted);margin-bottom:2px}
  .segs td.handle{position:absolute;right:40px;top:6px;width:auto;padding:0}
  .segs td.handle .ibtn{display:inline-block}
  .segs td:last-child{position:absolute;right:6px;top:6px;width:auto;padding:0}
  .segs textarea{min-width:0}
  .segs select{width:auto;max-width:calc(100% - 100px)}
  .filters input{width:100%}
  .add-user input,.user-edit input{width:100%!important}
  .q-meta{font-size:13px}
  .pick-list{max-height:300px}
  /* 逐页编辑器 */
  .deck{display:flex;flex-direction:column}
  .deck-main{order:1}
  .deck-list{order:2;position:static;max-height:none;display:flex;overflow-x:auto;gap:6px;padding:8px}
  .deck-list .thumb{flex:none;width:150px}
  .deck-list .deck-tools{flex:none;border:0;margin:0;align-items:center}
  .gen-bar{flex-direction:column;align-items:stretch}
  .gen-left{min-width:0;flex-wrap:wrap}
  .gen-right .btn{flex:1}
}
@media (max-width:820px){
  .segs tr.seg td:nth-child(2){padding-right:78px}
  .segs tr.seg td:nth-child(2) select{width:100%;max-width:none;margin-bottom:6px}
  .segs .mins{width:80px}
  .segs td.handle{right:36px;top:10px}
  .segs td:last-child{top:10px}
  .segs td.handle .ibtn,.segs td:last-child .ibtn{font-size:17px;padding:4px 7px}
}

/* ================= 柔和外观（全局） ================= */
body{background:var(--bg);color:var(--ink)}
.card,.stat,.pl,.deck-card,.starter{border-radius:var(--radius)}
input,select,textarea{background:var(--panel);color:var(--ink);border-color:var(--line);border-radius:12px}
input:disabled{background:var(--soft);color:var(--muted)}
.btn{border-color:var(--brand-line);color:var(--brand)}
.btn.ghost{border-color:var(--line);color:var(--ink);background:var(--panel)}
.btn.ghost:hover{background:var(--soft)}
.btn.primary,.btn.ai{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 4px 14px rgba(var(--brand-rgb),.22)}
.btn.primary:hover,.btn.ai:hover{filter:brightness(1.05);background:var(--grad)}
.btn.danger{background:var(--err);border-color:var(--err)}
a{color:var(--brand)}
.tag{background:var(--soft);color:var(--ink2)}
.tbl th{background:var(--soft);color:var(--muted)}
.tbl th,.tbl td{border-color:var(--line2)}
.checks .error{color:var(--err)}.checks .warn{color:var(--warn)}.checks .info{background:var(--soft);color:var(--ink2)}
.ai-box{background:var(--ai-bg);border-color:var(--brand-line)}
.ai-box summary{color:var(--ai)}
.flash{background:var(--ok-bg);color:var(--ok)}
.flash.err{background:var(--err-bg);color:var(--err)}
.busy-box,.toast{border-radius:16px}
.busy-box{background:var(--panel);color:var(--ink)}
.toast{background:var(--ink);color:var(--bg)}
.toast.err{background:var(--err);color:#fff}
.mark{background:var(--grad)!important;box-shadow:0 4px 10px rgba(var(--brand-rgb),.25)!important}
.theme-btn{display:flex;align-items:center;gap:10px;margin:0 10px 6px;padding:9px 14px;border:0;border-radius:12px;background:none;color:var(--ink2);font:inherit;cursor:pointer;text-align:left}
.theme-btn:hover{background:var(--soft)}
.theme-btn i{font-style:normal;width:20px;color:var(--muted)}
.me-card{padding:0;overflow:hidden}
.me-row{display:flex;align-items:center;gap:14px;padding:18px 20px;border-bottom:1px solid var(--line2)}
.me-av{display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;font-weight:700;font-size:18px}
.me-links a,.me-links button{display:flex;align-items:center;gap:12px;width:100%;padding:14px 20px;border:0;border-bottom:1px solid var(--line2);background:none;color:var(--ink);font:inherit;text-align:left;cursor:pointer;text-decoration:none!important}
.me-links a:hover,.me-links button:hover{background:var(--soft)}
.me-links span:first-child{width:22px;color:var(--muted)}
.me-links em{margin-left:auto;font-style:normal;color:var(--muted)}
.me-links form{margin:0}
.me-links form button{border-bottom:0}
.m-tabbar,.m-theme{display:none}

@media (max-width:820px){
  .side,.nav-mask,.menu-btn{display:none!important}
  .main{padding:0 14px calc(84px + env(safe-area-inset-bottom))}
  .m-bar{justify-content:space-between;background:var(--panel-a);border-bottom:1px solid var(--line2)}
  .m-theme{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--ink2);font-size:17px}
  .m-tabbar{display:flex;position:fixed;left:10px;right:10px;bottom:calc(8px + env(safe-area-inset-bottom));z-index:50;background:var(--panel-a);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:22px;box-shadow:0 8px 30px rgba(var(--shadow-rgb),.12);padding:6px}
  .m-tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px;padding:6px 0;border-radius:16px;color:var(--muted);font-size:11.5px;text-decoration:none!important}
  .m-tabbar a i{font-style:normal;font-size:18px;line-height:1.2}
  .m-tabbar a.on{color:var(--brand);background:var(--brand-soft);font-weight:600}
  .savebar{bottom:calc(76px + env(safe-area-inset-bottom));border-radius:18px;margin:0;border:1px solid var(--line);background:var(--panel-a);backdrop-filter:blur(10px)}
  .card{border-radius:18px}
  .me-card{margin-top:4px}
  .narrow{max-width:none}
  .btn{min-height:40px}
  .btn.sm{min-height:34px}
  .toast{bottom:calc(90px + env(safe-area-inset-bottom))}
}
.prov{border:1px solid var(--line2);background:var(--soft);border-radius:16px;padding:12px 14px;margin:0 0 12px}.prov>b{display:block;margin-bottom:6px}
.team-cfg{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:10px}
.tc-row{display:flex;gap:12px;border:1px solid var(--line2);background:var(--soft);border-radius:16px;padding:12px}
.tc-av{flex:none;display:grid;place-items:center;width:36px;height:36px;border-radius:50%;color:#fff;font-weight:700}
.tc-main{flex:1;min-width:0}
.tc-top{display:flex;align-items:center;gap:8px;margin-bottom:2px}
.tc-name{font-weight:600;padding:4px 8px;width:auto;flex:1;min-width:0}
.tc-main textarea{margin-top:6px;font-size:13px}
.switch{display:inline-flex!important;align-items:center;gap:6px;margin:0!important;font-weight:400!important;font-size:13px;cursor:pointer;white-space:nowrap}
.switch input{display:none}
.switch i{width:36px;height:20px;border-radius:999px;background:var(--soft2);position:relative;transition:background .2s;border:1px solid var(--line)}
.switch i:after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:var(--panel);box-shadow:0 1px 2px rgba(0,0,0,.2);transition:left .2s}
.switch input:checked+i{background:var(--brand)}
.switch input:checked+i:after{left:18px}
.sp.has-img{flex-direction:column}
.sp-left{max-width:58%}
.sp-img{background-size:cover;background-position:center}
.sp-img.side{position:absolute;right:7cqw;top:12cqw;width:34cqw;bottom:7cqw;border-radius:1.6cqw}
.sp-img.full{position:absolute;right:0;top:0;bottom:0;width:46%}
.sp.section.has-img .sp-left{margin-top:auto;margin-bottom:auto}
@media (max-width:820px){
  .tbl.lessons thead{display:none}
  .tbl.lessons,.tbl.lessons tbody,.tbl.lessons tr,.tbl.lessons td{display:block;width:100%}
  .tbl.lessons tr{display:flex;flex-wrap:wrap;align-items:center;gap:4px 10px;border:1px solid var(--line);border-radius:16px;padding:12px 14px;margin-bottom:10px;background:var(--panel)}
  .tbl.lessons td{border:0;padding:0;width:auto}
  .tbl.lessons td:nth-child(1):before{content:"第"}.tbl.lessons td:nth-child(1):after{content:"次"}
  .tbl.lessons td:nth-child(1){color:var(--muted);font-size:13px}
  .tbl.lessons td:nth-child(3){order:-1;width:100%;font-size:16px;font-weight:600}
  .tbl.lessons td:last-child{width:100%;text-align:left;padding-top:6px;border-top:1px dashed var(--line2);margin-top:4px}
  .tbl:not(.lessons):not(.segs){display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .tbl.edit textarea{min-width:200px}.tbl.edit input{min-width:70px}
}
.env-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px;margin-bottom:12px}
.env-grid>div{background:var(--soft);border-radius:12px;padding:8px 12px}
.env-grid small{display:block;font-size:11px}
.env-grid b{font-size:13px;word-break:break-all}
.logbox{background:var(--soft);border-radius:12px;padding:12px;font-size:12px;max-height:360px;overflow:auto;white-space:pre-wrap;word-break:break-all;margin:0}

/* 页面内对话框 */
.ui-modal{animation:fadein .15s ease}
.ui-modal .modal{animation:popin .18s ease;width:min(440px,100%)}
.ui-modal.closing{opacity:0;transition:opacity .12s}
.ui-modal .modal h3{margin:0 0 10px;font-size:17px}
.ui-msg{margin:0 0 6px;color:var(--ink2);line-height:1.7}
.ui-input{margin-top:6px}
.ui-actions{margin-top:18px;gap:8px}
@keyframes fadein{from{opacity:0}to{opacity:1}}
@keyframes popin{from{transform:translateY(8px) scale(.98);opacity:0}to{transform:none;opacity:1}}
.modal-bg{position:fixed;inset:0;background:var(--mask);display:grid;place-items:center;z-index:120;padding:16px;backdrop-filter:blur(2px)}
.modal{background:var(--panel);color:var(--ink);border-radius:22px;padding:22px 24px;width:min(720px,100%);max-height:90vh;overflow:auto;box-shadow:0 30px 80px rgba(0,0,0,.25)}
/* 选图面板 */
.ui-modal .modal.picker{width:min(860px,100%)}
.pk-bar{display:flex;gap:8px}
.pk-bar input{flex:1}
.pk-note{margin:8px 2px 10px;min-height:18px}
.pk-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.pk-item{position:relative;border:2px solid transparent;border-radius:14px;overflow:hidden;padding:0;background:var(--soft);cursor:pointer;aspect-ratio:16/10;transition:transform .12s,border-color .12s}
.pk-item:hover{border-color:var(--brand);transform:translateY(-2px)}
.pk-item img{width:100%;height:100%;object-fit:cover;display:block}
.pk-item span{position:absolute;left:0;right:0;bottom:0;font-size:10.5px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.6));padding:14px 8px 5px;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pk-grid.busy .pk-item:not(.picking){opacity:.4;pointer-events:none}
.pk-item.picking:after{content:"正在使用…";position:absolute;inset:0;display:grid;place-items:center;background:rgba(0,0,0,.45);color:#fff;font-size:13px}
.pk-skel{aspect-ratio:16/10;border-radius:14px;background:linear-gradient(90deg,var(--soft) 0,var(--soft2) 50%,var(--soft) 100%);background-size:200% 100%;animation:skel 1.2s infinite}
@keyframes skel{from{background-position:200% 0}to{background-position:-200% 0}}
.pk-empty{grid-column:1/-1;background:var(--soft);border-radius:14px;padding:22px;text-align:center;color:var(--ink2);font-size:13px}
.pk-more{text-align:center;margin-top:10px}
.picker .ui-actions{flex-wrap:wrap}
@media (max-width:820px){
  .modal-bg{align-items:end;padding:0}
  .modal,.ui-modal .modal{width:100%;border-radius:22px 22px 0 0;max-height:90vh;padding:18px 16px calc(16px + env(safe-area-inset-bottom))}
  .ui-modal .modal{animation:sheetin .2s ease}
  .pk-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .ui-actions .btn{flex:1}
  @keyframes sheetin{from{transform:translateY(40px);opacity:.5}to{transform:none;opacity:1}}
}

/* ===== 手机端：贴底导航、去缝隙、修正错位（v13） ===== */
html{-webkit-text-size-adjust:100%}
button,a,.btn,.chip{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
@media (max-width:820px){
  .main{padding:0 14px calc(76px + env(safe-area-inset-bottom))}
  .m-bar{padding-top:calc(10px + env(safe-area-inset-top))}
  .m-tabbar{left:0;right:0;bottom:0;border-radius:20px 20px 0 0;border-width:1px 0 0;padding:6px 8px calc(6px + env(safe-area-inset-bottom));box-shadow:0 -6px 24px rgba(var(--shadow-rgb),.08)}
  .m-tabbar a{padding:6px 0 4px;border-radius:14px}
  .savebar{position:fixed;left:0;right:0;bottom:calc(62px + env(safe-area-inset-bottom));margin:0;border-radius:0;border-width:1px 0 0;padding:10px 14px;z-index:45}
  .savebar .btn{flex:1}
  form#lesson-form{padding-bottom:70px}
  .toast{bottom:calc(84px + env(safe-area-inset-bottom))}
  .deck,.deck-main,.deck-list,.gen-bar{min-width:0;max-width:100%}
  .deck-list{width:100%}
}

/* v14 教学技能库（管理） */
.skill-list{display:flex;flex-direction:column;gap:8px;margin:8px 0 12px}
.sk-cat{font-size:12px;font-weight:700;color:var(--muted);margin:10px 2px 0;letter-spacing:.04em}
.sk-item{border:1px solid var(--line);border-radius:14px;background:var(--panel);overflow:hidden}
.sk-item.off{opacity:.6}
.sk-item>summary{list-style:none;cursor:pointer;padding:10px 14px;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.sk-item>summary::-webkit-details-marker{display:none}
.sk-item>summary b{white-space:nowrap}
.sk-item[open]>summary{border-bottom:1px solid var(--line)}
.sk-body{padding:12px 14px}
.sk-agents{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;margin:4px 0 10px}
.sk-agents .chk{display:inline-flex;gap:4px;align-items:center;font-size:13px;margin:0}
.sk-agents .chk input{width:auto;margin:0}
.sk-add{margin-top:8px}
.sk-add>summary{list-style:none;display:inline-flex}
.sk-add>summary::-webkit-details-marker{display:none}
.sk-add[open]>summary{margin-bottom:10px}
.skill-form .grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:640px){.skill-form .grid2{grid-template-columns:1fr}}
@media (max-width:820px){.d-only{display:none!important}}
@media (max-width:640px){.drop-inner .m-only{display:block!important}}
/* 全局兜底：长文本不撑出屏幕 */
@media (max-width:820px){
  h1,h2,h3,p,li,td,.crumb,.muted{overflow-wrap:anywhere}
  .main,.card{min-width:0;max-width:100%}
  img,video,table{max-width:100%}
}

/* v16 线性图标 */
.ico{width:1.15em;height:1.15em;flex:none;display:inline-block;vertical-align:-.2em;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.ico.lg{width:22px;height:22px}
.ico.xl{width:26px;height:26px}
.btn .ico{margin-right:4px}
.btn .ico:only-child{margin-right:0}
.ico.spin{animation:spin 1s linear infinite}
.th-sun{display:none!important}
:root[data-theme="dark"] .th-sun{display:inline-block!important}
:root[data-theme="dark"] .th-moon{display:none!important}
.side nav .ni{display:inline-grid;place-items:center}
.side nav .ni .ico{width:19px;height:19px}
.m-tabbar i .ico{width:23px;height:23px;stroke-width:1.7}
.m-tabbar a.on i .ico{stroke-width:2}
.me-links .ico{width:19px;height:19px}
.me-links em .ico{width:16px;height:16px;color:var(--muted)}
.theme-btn i .ico,.m-theme .ico,.sn-theme .ico{width:18px;height:18px}
.mark,.site-nav .mark,.site-foot .mark{background:none!important;overflow:hidden;padding:0}
.mark img{width:100%;height:100%;display:block}