/* ================= 基础 ================= */
:root{
  --bg:#F3F7F7;
  --surface:#FFFFFF;
  --surface-2:#F8FBFB;
  --line:#E2EBEB;
  --line-2:#EFF4F4;
  --ink:#0E2629;
  --ink-2:#476065;
  --ink-3:#82999D;
  --brand:#0E7C71;
  --brand-d:#0A5F57;
  --brand-2:#14A697;
  --brand-soft:#E4F3F1;
  --brand-soft-2:#F1F9F8;
  --accent:#E07B39;
  --accent-soft:#FDF1E7;
  --danger:#CE4343;
  --danger-soft:#FBEEEE;
  --ok:#1B9364;
  --ok-soft:#E9F6F0;
  --warn:#B4801F;
  --warn-soft:#FBF4E4;
  --r-s:10px;
  --r-m:14px;
  --r-l:18px;
  --shadow:0 1px 2px rgba(16,45,48,.04), 0 8px 24px -16px rgba(16,45,48,.18);
  --shadow-lg:0 2px 6px rgba(16,45,48,.05), 0 20px 48px -24px rgba(16,45,48,.28);
  --sidebar-w:254px;
}

*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:14.5px;
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}
svg{display:block;}
::selection{background:#BFE6E1;color:#08312C;}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:#D3E0E0;border-radius:99px;border:3px solid transparent;background-clip:content-box;}
::-webkit-scrollbar-thumb:hover{background:#B9CCCC;background-clip:content-box;border:3px solid transparent;}
::-webkit-scrollbar-track{background:transparent;}

/* ================= 布局 ================= */
.app{display:grid;grid-template-columns:var(--sidebar-w) 1fr;height:100vh;overflow:hidden;}

.sidebar{
  background:var(--surface);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:20px 14px 16px;
  overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:11px;padding:2px 6px 22px;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(145deg,var(--brand-2),var(--brand));
  color:#fff;display:grid;place-items:center;
  box-shadow:0 6px 16px -8px rgba(14,124,113,.8);
}
.brand-mark svg{width:20px;height:20px;}
.brand-txt{display:flex;flex-direction:column;line-height:1.3;}
.brand-txt strong{font-size:14.5px;letter-spacing:.2px;}
.brand-txt span{font-size:11.5px;color:var(--ink-3);letter-spacing:.6px;}

.nav{display:flex;flex-direction:column;gap:2px;}
.nav-item{
  display:flex;align-items:center;gap:11px;
  padding:10px 12px;border-radius:11px;
  color:var(--ink-2);font-size:14px;font-weight:500;
  transition:background .16s,color .16s;
  position:relative;
}
.nav-item svg{width:19px;height:19px;flex:none;opacity:.85;}
.nav-item:hover{background:var(--surface-2);color:var(--ink);}
.nav-item.active{background:var(--brand-soft);color:var(--brand-d);font-weight:600;}
.nav-item.active svg{opacity:1;}
.nav-item.active::before{
  content:"";position:absolute;left:-14px;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:0 3px 3px 0;background:var(--brand);
}

.side-foot{margin-top:auto;padding-top:26px;}
.mini-progress{background:var(--surface-2);border:1px solid var(--line-2);border-radius:12px;padding:12px;}
.mp-head{display:flex;justify-content:space-between;align-items:baseline;font-size:12px;color:var(--ink-2);margin-bottom:8px;}
.mp-head b{color:var(--brand);font-size:13px;}
.bar{height:6px;border-radius:99px;background:#E4EDED;overflow:hidden;}
.bar>i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand-2),var(--brand));transition:width .4s;}
.side-note{font-size:11px;color:var(--ink-3);line-height:1.6;margin-top:12px;padding:0 2px;}

.main{display:flex;flex-direction:column;overflow:hidden;min-width:0;}
.topbar{
  height:68px;flex:none;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 28px;gap:16px;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  z-index:20;
}
.tb-left{display:flex;align-items:center;gap:12px;min-width:0;}
.tb-left h1{font-size:17px;font-weight:650;letter-spacing:.2px;line-height:1.2;}
.tb-left p{font-size:12px;color:var(--ink-3);margin-top:2px;}
.tb-right{display:flex;align-items:center;gap:10px;}
.icon-btn{display:none;}

.ghost-btn{
  display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 13px;border-radius:9px;
  background:var(--brand-soft);color:var(--brand-d);
  border:1px solid transparent;font-size:13px;font-weight:600;cursor:pointer;
  transition:.16s;
}
.ghost-btn svg{width:15px;height:15px;}
.ghost-btn:hover{background:#D5EDEA;}
.avatar{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(145deg,#1D3E42,#0E2629);color:#fff;
  font-size:13px;font-weight:600;letter-spacing:.5px;
}

.view{flex:1;overflow-y:auto;padding:24px 28px 56px;scroll-behavior:smooth;}
.view-inner{max-width:1080px;margin:0 auto;}
.scrim{display:none;}

/* ================= 通用组件 ================= */
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-l);box-shadow:var(--shadow);
}
.card-pad{padding:20px 22px;}
.sec{margin-bottom:22px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:13px;}
.sec-title{font-size:15.5px;font-weight:650;display:flex;align-items:center;gap:8px;}
.sec-title .dot{width:6px;height:6px;border-radius:99px;background:var(--brand-2);}
.sec-sub{font-size:12.5px;color:var(--ink-3);margin-top:3px;}
.sec-act{font-size:12.5px;color:var(--brand);font-weight:600;cursor:pointer;white-space:nowrap;}
.sec-act:hover{text-decoration:underline;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:40px;padding:0 18px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  font-size:13.5px;font-weight:600;cursor:pointer;
  transition:.16s;white-space:nowrap;
}
.btn:hover{border-color:#C9DBDB;background:var(--surface-2);}
.btn svg{width:16px;height:16px;}
.btn.primary{
  background:linear-gradient(180deg,var(--brand-2),var(--brand));
  color:#fff;border-color:transparent;
  box-shadow:0 6px 16px -10px rgba(14,124,113,.9);
}
.btn.primary:hover{filter:brightness(1.05);}
.btn.dark{background:var(--ink);color:#fff;border-color:transparent;}
.btn.sm{height:32px;padding:0 12px;font-size:12.5px;border-radius:8px;}
.btn:disabled{opacity:.45;cursor:not-allowed;}

.tag{
  display:inline-flex;align-items:center;gap:5px;
  font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:7px;
  background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line-2);
  line-height:1.5;
}
.tag.brand{background:var(--brand-soft);color:var(--brand-d);border-color:transparent;}
.tag.warn{background:var(--warn-soft);color:var(--warn);border-color:transparent;}
.tag.danger{background:var(--danger-soft);color:var(--danger);border-color:transparent;}
.tag.ok{background:var(--ok-soft);color:var(--ok);border-color:transparent;}

.grid{display:grid;gap:14px;}
.g2{grid-template-columns:repeat(2,minmax(0,1fr));}
.g3{grid-template-columns:repeat(3,minmax(0,1fr));}
.g4{grid-template-columns:repeat(4,minmax(0,1fr));}

.muted{color:var(--ink-3);}
.small{font-size:12.5px;}
.tiny{font-size:11.5px;}
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}.mt20{margin-top:20px}
.center{text-align:center;}
.flex{display:flex;align-items:center;}
.between{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.wrap{flex-wrap:wrap;}

/* ================= 工作台 ================= */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#0B3B3A 0%,#0E7C71 62%,#17A08F 100%);
  color:#fff;border-radius:20px;padding:26px 28px;
  box-shadow:0 18px 40px -28px rgba(10,70,66,.9);
}
.hero::after{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.22),transparent 62%);
}
.hero::before{
  content:"";position:absolute;right:40px;bottom:-90px;width:220px;height:220px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);
}
.hero-in{position:relative;z-index:2;max-width:640px;}
.hero .hi{font-size:12.5px;letter-spacing:1.2px;opacity:.8;font-weight:600;}
.hero h2{font-size:24px;line-height:1.35;margin:8px 0 10px;font-weight:650;letter-spacing:.3px;}
.hero p{font-size:13.5px;opacity:.88;line-height:1.75;}
.hero-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap;}
.hero .btn{height:38px;font-size:13px;}
.hero .btn.light{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.28);color:#fff;backdrop-filter:blur(6px);}
.hero .btn.light:hover{background:rgba(255,255,255,.22);}
.hero .btn.white{background:#fff;color:var(--brand-d);border-color:transparent;}

.stat{padding:16px 18px;border-radius:var(--r-m);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);}
.stat .lb{font-size:12px;color:var(--ink-3);display:flex;align-items:center;gap:6px;}
.stat .vl{font-size:26px;font-weight:680;letter-spacing:-.5px;line-height:1.25;margin-top:6px;}
.stat .vl em{font-size:13px;font-weight:500;color:var(--ink-3);font-style:normal;margin-left:2px;}
.stat .ft{font-size:11.5px;color:var(--ink-3);margin-top:2px;}

.quick{display:flex;align-items:center;gap:14px;padding:15px 16px;border-radius:var(--r-m);border:1px solid var(--line);background:var(--surface);cursor:pointer;transition:.18s;}
.quick:hover{border-color:#BFDAD7;transform:translateY(-1px);box-shadow:var(--shadow);}
.qi{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;flex:none;background:var(--brand-soft);color:var(--brand);}
.qi svg{width:20px;height:20px;}
.qi.o{background:var(--accent-soft);color:var(--accent);}
.qi.b{background:#EAF0FB;color:#3B62B8;}
.quick b{display:block;font-size:13.5px;font-weight:620;}
.quick span{font-size:11.5px;color:var(--ink-3);}

.daily{padding:20px 22px;}
.daily .q{font-size:14.5px;font-weight:600;line-height:1.7;margin:10px 0 14px;}
.opt{
  display:flex;align-items:flex-start;gap:10px;
  padding:10px 13px;border-radius:10px;border:1px solid var(--line);
  margin-bottom:8px;cursor:pointer;transition:.15s;background:var(--surface);
  font-size:13.5px;line-height:1.6;
}
.opt:hover{border-color:#C6DCD9;background:var(--surface-2);}
.opt .bx{
  width:19px;height:19px;border-radius:6px;border:1.5px solid #C6D4D4;flex:none;
  display:grid;place-items:center;font-size:11px;font-weight:700;color:var(--ink-3);
  margin-top:1px;transition:.15s;
}
.opt.sel{border-color:var(--brand);background:var(--brand-soft-2);}
.opt.sel .bx{background:var(--brand);border-color:var(--brand);color:#fff;}
.opt.correct{border-color:#7FC5A9;background:var(--ok-soft);}
.opt.correct .bx{background:var(--ok);border-color:var(--ok);color:#fff;}
.opt.wrong{border-color:#E2A9A9;background:var(--danger-soft);}
.opt.wrong .bx{background:var(--danger);border-color:var(--danger);color:#fff;}
.opt.lock{cursor:default;}

.explain{
  margin-top:12px;padding:13px 15px;border-radius:11px;
  background:var(--brand-soft-2);border-left:3px solid var(--brand-2);
  font-size:13px;color:var(--ink-2);line-height:1.75;
}
.explain b{color:var(--brand-d);}

/* ================= 课程 ================= */
.alert{
  display:flex;gap:13px;padding:16px 18px;border-radius:var(--r-m);
  background:var(--warn-soft);border:1px solid #F0E1BE;
}
.alert .ai{flex:none;width:32px;height:32px;border-radius:9px;background:#F3DFAE;color:#8A6216;display:grid;place-items:center;font-weight:700;}
.alert h4{font-size:13.5px;font-weight:650;color:#7A5512;margin-bottom:3px;}
.alert p{font-size:12.5px;color:#8B6A2C;line-height:1.7;}

.fact{padding:16px 18px;border-radius:var(--r-m);border:1px solid var(--line);background:var(--surface);}
.fact h4{font-size:13.5px;font-weight:650;display:flex;align-items:center;gap:8px;margin-bottom:6px;}
.fact h4 i{width:22px;height:22px;border-radius:6px;background:var(--brand-soft);color:var(--brand-d);display:grid;place-items:center;font-size:11.5px;font-style:normal;font-weight:700;flex:none;}
.fact p{font-size:12.8px;color:var(--ink-2);line-height:1.78;}

.mod{border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface);overflow:hidden;margin-bottom:11px;transition:.18s;}
.mod:hover{border-color:#CFE1DF;}
.mod.open{border-color:#B9DBD6;box-shadow:var(--shadow);}
.mod-hd{display:flex;align-items:center;gap:14px;padding:16px 18px;cursor:pointer;}
.mod-ic{width:42px;height:42px;border-radius:11px;flex:none;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);}
.mod-ic svg{width:21px;height:21px;}
.mod-t{flex:1;min-width:0;}
.mod-t h3{font-size:14.5px;font-weight:640;display:flex;align-items:center;gap:8px;}
.mod-t p{font-size:12px;color:var(--ink-3);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.mod-meta{display:flex;align-items:center;gap:12px;flex:none;}
.hours{font-size:12px;color:var(--ink-3);}
.ring{width:34px;height:34px;position:relative;}
.ring svg{transform:rotate(-90deg);}
.ring span{position:absolute;inset:0;display:grid;place-items:center;font-size:10px;font-weight:700;color:var(--brand-d);}
.chev{width:16px;height:16px;color:var(--ink-3);transition:transform .2s;}
.mod.open .chev{transform:rotate(180deg);}
.mod-bd{display:none;padding:0 18px 16px;border-top:1px dashed var(--line-2);}
.mod.open .mod-bd{display:block;}
.lesson{padding:13px 0;border-bottom:1px dashed var(--line-2);}
.lesson:last-child{border-bottom:0;padding-bottom:2px;}
.lesson-hd{display:flex;align-items:center;gap:10px;cursor:pointer;}
.ck{
  width:18px;height:18px;border-radius:5px;border:1.5px solid #CBDADA;flex:none;
  display:grid;place-items:center;transition:.15s;background:#fff;
}
.ck svg{width:12px;height:12px;color:#fff;opacity:0;transition:.15s;}
.lesson.done .ck{background:var(--brand);border-color:var(--brand);}
.lesson.done .ck svg{opacity:1;}
.lesson-hd b{font-size:13.2px;font-weight:600;flex:1;}
.lesson.done .lesson-hd b{color:var(--ink-3);}
.lesson ul{margin:9px 0 0 28px;display:none;}
.lesson.open ul{display:block;}
.lesson li{font-size:12.8px;color:var(--ink-2);line-height:1.8;margin-bottom:5px;list-style:none;position:relative;padding-left:13px;}
.lesson li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:99px;background:#C3D8D5;}
.lesson li b{color:var(--brand-d);font-weight:650;}

/* ================= 题库 ================= */
.tabs{display:flex;gap:4px;padding:4px;background:#EAF1F1;border-radius:11px;width:fit-content;}
.tab{
  padding:8px 16px;border-radius:8px;font-size:13px;font-weight:600;
  color:var(--ink-2);cursor:pointer;border:0;background:transparent;transition:.16s;
  white-space:nowrap;
}
.tab.active{background:#fff;color:var(--brand-d);box-shadow:0 1px 3px rgba(16,45,48,.12);}

.exam-wrap{max-width:780px;margin:0 auto;}
.qbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;flex-wrap:wrap;}
.qbar .pgs{font-size:12.5px;color:var(--ink-3);}
.qcard{padding:24px 26px;}
.qmeta{display:flex;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap;}
.qtext{font-size:16px;font-weight:620;line-height:1.72;margin-bottom:18px;}
.qfoot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;flex-wrap:wrap;}

.timer{
  display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 12px;border-radius:8px;
  background:var(--surface-2);border:1px solid var(--line);font-size:13px;font-weight:650;
  font-variant-numeric:tabular-nums;color:var(--ink-2);
}
.timer.warn{background:var(--danger-soft);border-color:#EFC7C7;color:var(--danger);}

.cat-row{display:flex;align-items:center;gap:14px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);cursor:pointer;transition:.16s;}
.cat-row:hover{border-color:#BFDAD7;background:var(--brand-soft-2);}
.cat-row .ic{width:38px;height:38px;border-radius:10px;background:var(--brand-soft);color:var(--brand-d);display:grid;place-items:center;font-size:13px;font-weight:700;flex:none;}
.cat-row .info{flex:1;min-width:0;}
.cat-row b{font-size:13.5px;display:block;}
.cat-row span{font-size:11.5px;color:var(--ink-3);}

.result-hero{text-align:center;padding:32px 24px;}
.score-ring{width:132px;height:132px;margin:0 auto 18px;position:relative;}
.score-ring .num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.score-ring .num b{font-size:38px;font-weight:700;line-height:1;letter-spacing:-1px;}
.score-ring .num span{font-size:11.5px;color:var(--ink-3);margin-top:5px;}

.wrong-item{padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);margin-bottom:9px;cursor:pointer;transition:.16s;}
.wrong-item:hover{border-color:#CFE1DF;background:var(--surface-2);}
.wrong-item .wq{font-size:13.5px;font-weight:560;line-height:1.65;margin-bottom:6px;}
.wrong-item .wa{font-size:12px;color:var(--ink-3);}
.wrong-item .wa s{color:var(--danger);text-decoration:line-through;margin-right:8px;}
.wrong-item .wa em{color:var(--ok);font-style:normal;font-weight:600;}

.empty{text-align:center;padding:56px 20px;color:var(--ink-3);}
.empty .ei{width:56px;height:56px;border-radius:16px;background:var(--surface-2);border:1px solid var(--line);display:grid;place-items:center;margin:0 auto 14px;color:var(--ink-3);}
.empty h4{font-size:14px;color:var(--ink-2);margin-bottom:4px;font-weight:600;}
.empty p{font-size:12.5px;}

/* ================= AI 答疑 ================= */
.chat-shell{display:flex;flex-direction:column;height:calc(100vh - 68px - 80px);min-height:520px;max-width:900px;margin:0 auto;}
.chat-scroll{flex:1;overflow-y:auto;padding:6px 4px 18px;}
.msg{display:flex;gap:11px;margin-bottom:20px;align-items:flex-start;}
.msg .ava{width:32px;height:32px;border-radius:9px;flex:none;display:grid;place-items:center;font-size:12px;font-weight:600;}
.msg.ai .ava{background:linear-gradient(145deg,var(--brand-2),var(--brand));color:#fff;box-shadow:0 4px 12px -6px rgba(14,124,113,.9);}
.msg.me{flex-direction:row-reverse;}
.msg.me .ava{background:#E7EDF1;color:var(--ink-2);}
.bubble{
  max-width:min(720px,82%);padding:14px 17px;border-radius:14px;
  font-size:13.8px;line-height:1.82;background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--shadow);
  word-break:break-word;
}
.msg.me .bubble{background:var(--brand);color:#fff;border-color:transparent;box-shadow:0 6px 18px -12px rgba(14,124,113,.9);}
.bubble h4{font-size:14px;font-weight:680;margin:0 0 8px;color:var(--brand-d);}
.msg.me .bubble h4{color:#fff;}
.bubble p{margin:0 0 9px;}
.bubble p:last-child{margin-bottom:0;}
.bubble strong{font-weight:680;color:var(--brand-d);}
.msg.me .bubble strong{color:#fff;}
.bubble ul,.bubble ol{margin:6px 0 10px;padding-left:19px;}
.bubble li{margin-bottom:5px;}
.bubble table{border-collapse:collapse;width:100%;margin:8px 0;font-size:12.8px;}
.bubble th,.bubble td{border:1px solid var(--line);padding:6px 10px;text-align:left;}
.bubble th{background:var(--surface-2);font-weight:650;}
.bubble code{background:#EEF4F4;padding:1px 5px;border-radius:4px;font-size:12.5px;}
.bubble hr{border:0;border-top:1px dashed var(--line);margin:11px 0;}
.bubble .hintline{margin-top:10px;padding-top:9px;border-top:1px dashed var(--line);font-size:11.5px;color:var(--ink-3);}

.typing{display:flex;gap:4px;padding:6px 2px;}
.typing i{width:6px;height:6px;border-radius:99px;background:#B9CDCB;animation:bl 1.2s infinite;}
.typing i:nth-child(2){animation-delay:.15s;}
.typing i:nth-child(3){animation-delay:.3s;}
@keyframes bl{0%,60%,100%{opacity:.3;transform:translateY(0);}30%{opacity:1;transform:translateY(-3px);}}

.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;}
.chip{
  padding:7px 13px;border-radius:99px;border:1px solid var(--line);background:var(--surface);
  font-size:12.5px;color:var(--ink-2);cursor:pointer;transition:.16s;
}
.chip:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-soft-2);}

.composer{
  border:1px solid var(--line);border-radius:15px;background:var(--surface);
  box-shadow:var(--shadow-lg);padding:10px 10px 10px 16px;
  display:flex;align-items:flex-end;gap:10px;
}
.composer textarea{
  flex:1;border:0;outline:0;resize:none;background:transparent;
  font-size:13.8px;line-height:1.7;max-height:140px;padding:8px 0;
}
.composer textarea::placeholder{color:var(--ink-3);}
.send{
  width:38px;height:38px;border-radius:10px;flex:none;border:0;cursor:pointer;
  background:linear-gradient(180deg,var(--brand-2),var(--brand));color:#fff;
  display:grid;place-items:center;transition:.16s;
}
.send:hover{filter:brightness(1.06);}
.send:disabled{opacity:.4;cursor:not-allowed;}
.send svg{width:18px;height:18px;}
.composer-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:9px;padding:0 4px;font-size:11.5px;color:var(--ink-3);}

/* ================= 工具 ================= */
.tool-card{border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface);overflow:hidden;}
.tool-hd{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;cursor:pointer;}
.tool-hd b{font-size:13.5px;font-weight:620;}
.tool-bd{display:none;padding:0 16px 16px;border-top:1px dashed var(--line-2);}
.tool-card.open .tool-bd{display:block;}
.doc-pre{
  font-size:13px;line-height:1.95;white-space:pre-wrap;color:var(--ink-2);
  background:var(--surface-2);border:1px solid var(--line-2);border-radius:10px;
  padding:16px 18px;margin-top:12px;font-family:"SFMono-Regular",Consolas,"PingFang SC",monospace;
  max-height:460px;overflow:auto;
}

.sop-group{margin-bottom:16px;}
.sop-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;}
.sop-hd b{font-size:13px;font-weight:650;color:var(--brand-d);}
.check-item{display:flex;align-items:flex-start;gap:10px;padding:9px 12px;border-radius:9px;cursor:pointer;transition:.14s;}
.check-item:hover{background:var(--surface-2);}
.check-item .ck{margin-top:3px;}
.check-item.done .txt{color:var(--ink-3);text-decoration:line-through;}
.check-item .txt{font-size:13px;line-height:1.65;}

.redline{padding:15px 16px;border-radius:12px;border:1px solid #F0D9D9;background:linear-gradient(180deg,#FEF8F8,#FDF2F2);}
.redline b{display:flex;align-items:center;gap:7px;font-size:13.5px;color:#A53434;font-weight:680;margin-bottom:5px;}
.redline b i{width:18px;height:18px;border-radius:5px;background:#F3CFCF;color:#A53434;display:grid;place-items:center;font-size:11px;font-style:normal;font-weight:700;}
.redline p{font-size:12.5px;color:#8D5A5A;line-height:1.7;}

.calc-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.calc-row label{font-size:12.5px;color:var(--ink-2);width:110px;flex:none;}
.calc-row input{
  flex:1;height:36px;border:1px solid var(--line);border-radius:9px;padding:0 12px;
  font-size:13.5px;background:var(--surface);outline:0;transition:.16s;
}
.calc-row input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(20,166,151,.12);}
.calc-out{
  margin-top:14px;padding:16px 18px;border-radius:12px;
  background:linear-gradient(120deg,#0E4F49,#0E7C71);color:#fff;
}
.calc-out .row{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;opacity:.85;margin-bottom:6px;}
.calc-out .big{font-size:28px;font-weight:700;letter-spacing:-.5px;margin-top:4px;}

table.data{width:100%;border-collapse:collapse;font-size:12.8px;}
table.data th,table.data td{border-bottom:1px solid var(--line-2);padding:10px 12px;text-align:left;}
table.data th{background:var(--surface-2);font-weight:650;color:var(--ink-2);font-size:12px;white-space:nowrap;}
table.data tr:last-child td{border-bottom:0;}
table.data td b{color:var(--brand-d);}

/* ================= 我的 ================= */
.setting-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px dashed var(--line-2);}
.setting-row:last-child{border-bottom:0;}
.setting-row .sd b{font-size:13.5px;font-weight:600;display:block;}
.setting-row .sd span{font-size:12px;color:var(--ink-3);}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px;}
.field label{font-size:12px;font-weight:600;color:var(--ink-2);}
.field input{height:38px;border:1px solid var(--line);border-radius:9px;padding:0 12px;font-size:13px;outline:0;background:var(--surface);}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(20,166,151,.12);}

/* ================= 响应式 ================= */
@media (max-width:1080px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .g3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:860px){
  .app{grid-template-columns:1fr;}
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;width:262px;z-index:60;
    transform:translateX(-100%);transition:transform .24s ease;
    box-shadow:0 0 40px rgba(10,40,40,.18);
  }
  .app.menu-open .sidebar{transform:translateX(0);}
  .app.menu-open .scrim{display:block;position:fixed;inset:0;background:rgba(9,32,33,.32);z-index:50;backdrop-filter:blur(2px);}
  .icon-btn{
    display:grid;place-items:center;width:36px;height:36px;border-radius:9px;
    border:1px solid var(--line);background:var(--surface);cursor:pointer;color:var(--ink-2);
  }
  .icon-btn svg{width:19px;height:19px;}
  .topbar{height:62px;padding:0 16px;}
  .tb-left h1{font-size:15.5px;}
  .tb-left p{display:none;}
  .view{padding:16px 14px 40px;}
  .g2,.g3,.g4{grid-template-columns:1fr;}
  .hero{padding:22px 20px;border-radius:16px;}
  .hero h2{font-size:20px;}
  .chat-shell{height:calc(100vh - 62px - 60px);}
  .qcard{padding:18px 16px;}
  .qtext{font-size:15px;}
  .bubble{max-width:88%;}
  .ghost-btn span{display:none;}
  .mod-meta .hours{display:none;}
}
@media (max-width:420px){
  .hero-actions .btn{flex:1;justify-content:center;}
  .opt{font-size:13px;}
}

/* ================= 打印（文书） ================= */
@media print{
  body{background:#fff;}
  .sidebar,.topbar,.tabs,.sec-act,.btn,.chips,.composer,.scrim{display:none !important;}
  .app{display:block;height:auto;}
  .view{overflow:visible;padding:0;}
  .doc-pre{max-height:none;border:0;background:#fff;padding:0;font-size:12.5pt;line-height:2;}
  .card{box-shadow:none;border:0;}
}
.qi.g{background:#E6F3EC;color:#1F8A5F;}

/* 课程：考点速记 / 场景演练 */
.lesson .lk{background:#FFF7E8;border:1px solid #F0DFC0;border-radius:10px;padding:10px 14px;margin:10px 0 4px;}
.lesson .lk>b{color:#9A6B15;font-size:12.5px;display:block;margin-bottom:6px;}
.lesson .lk ul{margin:0;padding-left:18px;font-size:13px;color:#7A5510;line-height:1.85;}
.lesson .ls{background:#EFF6F4;border:1px solid #CFE5DD;border-radius:10px;padding:10px 14px;margin:10px 0 4px;}
.lesson .ls>b{color:#0E5C55;font-size:12.5px;display:block;margin-bottom:6px;}
.lesson .ls p{margin:0;font-size:13px;color:#234B45;line-height:1.9;}