/* ============ 基础变量 ============ */
:root{
  --bg:#f4f6fb;
  --panel:#ffffff;
  --panel-2:#f8fafc;
  --line:#e6eaf2;
  --line-2:#eef1f7;
  --text:#1b2434;
  --text-2:#5b667a;
  --text-3:#8b95a8;
  --primary:#4c6ef5;
  --primary-d:#3b5bdb;
  --primary-l:#eef2ff;
  --green:#12a06a;
  --green-l:#e7f7f0;
  --blue:#2f7fe0;
  --blue-l:#eaf3fd;
  --orange:#e8833a;
  --orange-l:#fdf1e6;
  --red:#e0453c;
  --red-l:#fdeceb;
  --purple:#8250df;
  --purple-l:#f3edfd;
  --radius:14px;
  --radius-s:10px;
  --shadow:0 1px 2px rgba(23,35,58,.05), 0 8px 24px rgba(23,35,58,.06);
  --shadow-s:0 1px 3px rgba(23,35,58,.08);
  --sidebar-w:236px;
  --safe-b:env(safe-area-inset-bottom, 0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg); color:var(--text); font-size:15px; line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;line-height:1.35}
p{margin:0}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;font-size:inherit}
textarea,input,select{font-family:inherit;font-size:15px;color:var(--text)}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#d3dae6;border-radius:8px}
::-webkit-scrollbar-track{background:transparent}

/* ============ 布局骨架 ============ */
.app-shell{display:flex;min-height:100vh}
.sidebar{
  width:var(--sidebar-w);flex:0 0 var(--sidebar-w);background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.brand{display:flex;align-items:center;gap:10px;padding:20px 18px 16px}
.brand-logo{
  width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,#4c6ef5,#7048e8);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;flex:0 0 38px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:15px}
.brand-text span{font-size:11.5px;color:var(--text-3)}
.nav{display:flex;flex-direction:column;gap:2px;padding:6px 12px;flex:1;overflow:auto}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;
  color:var(--text-2);font-size:14.5px;text-align:left;width:100%;transition:.15s;
}
.nav-item .ico{width:20px;text-align:center;font-size:16px}
.nav-item:hover{background:var(--panel-2);color:var(--text)}
.nav-item.active{background:var(--primary-l);color:var(--primary-d);font-weight:600}
.nav-item .badge{margin-left:auto;background:var(--red);color:#fff;font-size:11px;padding:1px 7px;border-radius:20px;font-weight:600}
.sidebar-foot{padding:14px}
.streak-card{background:linear-gradient(135deg,#fff4e6,#ffe9d6);border-radius:var(--radius);padding:12px 14px;text-align:center}
.streak-num{font-size:26px;font-weight:800;color:#e8833a;line-height:1.1}
.streak-label{font-size:11.5px;color:#a86a3c}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 26px;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;
}
.topbar-title h1{font-size:19px;font-weight:700}
.topbar-title p{font-size:12.5px;color:var(--text-3);margin-top:1px}
.model-chip{
  font-size:12px;padding:5px 11px;border-radius:20px;background:var(--panel-2);
  color:var(--text-2);border:1px solid var(--line);white-space:nowrap;max-width:190px;overflow:hidden;text-overflow:ellipsis;
}
.model-chip.ok{background:var(--green-l);color:var(--green);border-color:#c9ecdd}
.model-chip.warn{background:var(--orange-l);color:var(--orange);border-color:#f7ddc4}
.view-wrap{padding:22px 26px 60px;max-width:1080px;width:100%}

.tabbar{display:none}

/* ============ 通用组件 ============ */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-s)}
.card-pad{padding:18px}
.card + .card{margin-top:14px}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.row{display:flex;gap:10px;align-items:center}
.row-wrap{flex-wrap:wrap}
.spacer{flex:1}
.sec-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;margin-bottom:12px}
.sec-title .dot{width:4px;height:15px;border-radius:3px;background:var(--primary)}
.hint{font-size:12.5px;color:var(--text-3);line-height:1.6}
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}.mt20{margin-top:20px}
.mb8{margin-bottom:8px}.mb12{margin-bottom:12px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 16px;border-radius:10px;font-size:14px;font-weight:600;
  background:var(--panel-2);color:var(--text-2);border:1px solid var(--line);transition:.15s;
}
.btn:hover{background:#eef1f7}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 12px rgba(76,110,245,.28)}
.btn-primary:hover{background:var(--primary-d)}
.btn-green{background:var(--green);color:#fff;border-color:var(--green)}
.btn-green:hover{filter:brightness(.94)}
.btn-outline{background:#fff}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}
.icon-btn{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--text-3);font-size:15px}
.icon-btn:hover{background:var(--panel-2);color:var(--text)}

.field{margin-bottom:14px}
.label{font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px;display:flex;align-items:center;gap:6px}
.label .req{color:var(--red)}
.input,.textarea,.select{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;
  outline:none;transition:.15s;line-height:1.6;
}
.input:focus,.textarea:focus,.select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(76,110,245,.12)}
.textarea{resize:vertical;min-height:110px}
.textarea.tall{min-height:200px}
.textarea.en{font-family:"SF Mono","Cascadia Mono",Consolas,Monaco,monospace;font-size:14.5px}

.tabs{display:flex;gap:4px;background:var(--panel-2);padding:4px;border-radius:11px;overflow-x:auto}
.tabs button{
  flex:1;white-space:nowrap;padding:7px 13px;border-radius:8px;font-size:13.5px;
  color:var(--text-2);font-weight:600;transition:.15s;
}
.tabs button.active{background:#fff;color:var(--primary-d);box-shadow:var(--shadow-s)}

.tag{
  display:inline-flex;align-items:center;gap:4px;font-size:11.5px;padding:2px 9px;border-radius:20px;
  background:var(--panel-2);color:var(--text-2);border:1px solid var(--line);
}
.tag-blue{background:var(--blue-l);color:var(--blue);border-color:#d6e7fa}
.tag-green{background:var(--green-l);color:var(--green);border-color:#c9ecdd}
.tag-orange{background:var(--orange-l);color:var(--orange);border-color:#f7ddc4}
.tag-red{background:var(--red-l);color:var(--red);border-color:#f8d3d1}
.tag-purple{background:var(--purple-l);color:var(--purple);border-color:#e3d5fb}

/* ============ 提示卡片 ============ */
.callout{background:var(--primary-l);border:1px solid #d6e7fa;border-radius:10px;padding:12px 14px}
.callout .co-title{font-size:13.5px;font-weight:700;color:var(--primary-d)}

/* ============ 模型选择器 ============ */
.md-list{max-height:44vh;overflow-y:auto;-webkit-overflow-scrolling:touch;margin:0 -4px}
.md-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:9px;cursor:pointer;border:1px solid transparent;transition:.12s}
.md-item:hover{background:var(--bg-2);border-color:var(--line)}
.mi-main{flex:1;min-width:0}
.mi-id{font-family:ui-monospace,Consolas,monospace;font-size:13px;color:var(--text);word-break:break-all;line-height:1.4}
.mi-name{font-size:12px;color:var(--text-3);margin-top:2px;word-break:break-all}
.mi-tags{display:flex;gap:5px;flex-shrink:0;flex-wrap:wrap;justify-content:flex-end}
.md-seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden}
.md-seg button{border:none;border-radius:0;background:var(--panel);padding:6px 12px;font-size:13px;color:var(--text-2);cursor:pointer;font-family:inherit}
.md-seg button.on{background:var(--primary);color:#fff}

.empty{text-align:center;padding:44px 20px;color:var(--text-3)}
.empty .emo{font-size:34px;display:block;margin-bottom:10px}
.empty p{font-size:13.5px}

/* ============ 上传区 ============ */
.uploader{
  border:1.5px dashed #c9d3e6;border-radius:12px;padding:14px;text-align:center;
  background:var(--panel-2);transition:.15s;cursor:pointer;
}
.uploader:hover,.uploader.drag{border-color:var(--primary);background:var(--primary-l)}
.uploader .u-ico{font-size:20px}
.uploader .u-txt{font-size:13px;color:var(--text-2);margin-top:2px}
.uploader .u-sub{font-size:11.5px;color:var(--text-3)}
.thumbs{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.thumb{position:relative;width:80px;height:80px;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb .del{
  position:absolute;top:3px;right:3px;width:19px;height:19px;border-radius:50%;background:rgba(0,0,0,.55);
  color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;
}
.mode-switch{display:flex;gap:6px;margin-bottom:10px}
.mode-switch button{
  flex:1;padding:8px;border-radius:9px;border:1px solid var(--line);background:#fff;
  font-size:13.5px;font-weight:600;color:var(--text-2);display:flex;align-items:center;justify-content:center;gap:6px;
}
.mode-switch button.active{border-color:var(--primary);background:var(--primary-l);color:var(--primary-d)}

/* ============ 批改结果 ============ */
.score-hero{
  display:flex;align-items:center;gap:20px;padding:20px;border-radius:var(--radius);
  background:linear-gradient(135deg,#f7f9ff,#eef3ff);border:1px solid #dde6fb;
}
.score-big{text-align:center;flex:0 0 118px}
.score-big .num{font-size:44px;font-weight:800;line-height:1;letter-spacing:-1px}
.score-big .num .den{font-size:17px;font-weight:600;color:var(--text-3);letter-spacing:0}
.score-big .band{margin-top:6px}
.score-meta{flex:1;min-width:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px}
.meta-box{background:rgba(255,255,255,.75);border-radius:10px;padding:8px 11px;border:1px solid #e6ecfa}
.meta-box .k{font-size:11.5px;color:var(--text-3)}
.meta-box .v{font-size:14px;font-weight:600;margin-top:1px;word-break:break-word}
.score-b1 .num{color:var(--green)}
.score-b2 .num{color:var(--blue)}
.score-b3 .num{color:var(--orange)}
.score-b4 .num{color:var(--red)}

.bar{height:8px;border-radius:6px;background:#e8edf5;overflow:hidden}
.bar i{display:block;height:100%;border-radius:6px;background:var(--primary)}
.bar.g i{background:var(--green)}.bar.b i{background:var(--blue)}
.bar.o i{background:var(--orange)}.bar.r i{background:var(--red)}

.sent-item{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden;background:#fff}
.sent-head{display:flex;align-items:center;gap:10px;padding:11px 14px;background:var(--panel-2);border-bottom:1px solid var(--line-2)}
.sent-idx{
  width:23px;height:23px;border-radius:7px;background:var(--primary);color:#fff;font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;flex:0 0 23px;
}
.sent-src{font-size:13px;color:var(--text-2);flex:1;min-width:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sent-score{font-size:13px;font-weight:700;color:var(--text);white-space:nowrap}
.sent-body{padding:13px 14px}
.sent-line{margin-bottom:10px}
.sent-line .k{
  font-size:11.5px;font-weight:700;color:var(--text-3);letter-spacing:.4px;margin-bottom:3px;
  display:flex;align-items:center;gap:5px;
}
.sent-line .v{font-size:14px;line-height:1.7;background:var(--panel-2);padding:8px 11px;border-radius:9px;border:1px solid var(--line-2)}
.sent-line .v.en{font-family:"SF Mono","Cascadia Mono",Consolas,monospace;font-size:13.8px}
.sent-line .v.good{background:var(--green-l);border-color:#c9ecdd}
.sent-line .v.bad{background:var(--red-l);border-color:#f8d3d1}
.kp-list{display:flex;flex-direction:column;gap:6px}
.kp{display:flex;align-items:flex-start;gap:8px;font-size:13px;background:var(--panel-2);padding:7px 10px;border-radius:9px;border:1px solid var(--line-2)}
.kp .kp-i{
  flex:0 0 auto;font-size:11px;font-weight:700;padding:1px 7px;border-radius:20px;margin-top:1px;
}
.kp.hit .kp-i{background:var(--green-l);color:var(--green)}
.kp.partial .kp-i{background:var(--orange-l);color:var(--orange)}
.kp.miss .kp-i{background:var(--red-l);color:var(--red)}
.kp .kp-t{flex:1;min-width:0}
.kp .kp-n{font-size:12px;color:var(--text-3);margin-top:2px}

.essay-line{border-bottom:1px dashed var(--line);padding:12px 0}
.essay-line:last-child{border-bottom:none}
.essay-line .orig,.essay-line .fix{
  padding:8px 11px;border-radius:9px;font-size:14px;line-height:1.75;
  font-family:"SF Mono","Cascadia Mono",Consolas,monospace;white-space:pre-wrap;word-break:break-word;
}
.essay-line .orig{background:var(--red-l);border:1px solid #f8d3d1}
.essay-line .fix{background:var(--green-l);border:1px solid #c9ecdd}
.essay-line .fix b{background:#ffe9a8;border-radius:3px;padding:0 2px}
.essay-line .cn{font-size:13px;color:var(--text-2);margin-top:6px;background:var(--panel-2);padding:7px 10px;border-radius:8px;border:1px solid var(--line-2)}
.essay-line .fl{font-size:11.5px;font-weight:700;color:var(--text-3);margin-bottom:3px;display:block}
.essay-line .fl .opt{color:var(--orange)}
.essay-line .fl .must{color:var(--red)}

.exp-item{border:1px solid var(--line);border-radius:11px;padding:11px 13px;background:#fff;margin-bottom:9px}
.exp-item .e{font-family:"SF Mono","Cascadia Mono",Consolas,monospace;font-size:14px;font-weight:600;color:var(--primary-d)}
.exp-item .m{font-size:12.5px;color:var(--text-2);margin-top:3px}

.weak-item{display:flex;gap:10px;padding:12px;border-radius:11px;background:#fff;border:1px solid var(--line);margin-bottom:9px}
.weak-item .wi-n{
  flex:0 0 22px;height:22px;border-radius:7px;background:var(--orange-l);color:var(--orange);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.weak-item .wi-t{font-size:14px;font-weight:600}
.weak-item .wi-d{font-size:13px;color:var(--text-2);margin-top:2px}

/* ============ 训练 ============ */
.train-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden;transition:.18s}
.train-card:hover{box-shadow:var(--shadow);transform:translateY(-1px)}
.train-card .tc-top{padding:14px 15px 12px;display:flex;gap:11px}
.train-card .tc-ico{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:19px;flex:0 0 38px;
}
.train-card .tc-t{font-size:15px;font-weight:700}
.train-card .tc-d{font-size:12.5px;color:var(--text-3);margin-top:2px;line-height:1.55}
.train-card .tc-foot{padding:10px 15px;border-top:1px solid var(--line-2);background:var(--panel-2);display:flex;align-items:center;justify-content:space-between}

.q-block{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px}
.q-head{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.q-n{width:21px;height:21px;border-radius:6px;background:var(--text);color:#fff;font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:0 0 21px}
.q-en{font-family:"SF Mono","Cascadia Mono",Consolas,monospace;font-size:14.5px;line-height:1.75;white-space:pre-wrap}
.q-cn{font-size:14px;line-height:1.75;white-space:pre-wrap;background:var(--panel-2);padding:9px 11px;border-radius:9px;border:1px solid var(--line-2)}

.chart-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px}
.chart-title{font-size:14.5px;font-weight:700;margin-bottom:8px}
table.data-tb{width:100%;border-collapse:collapse;font-size:13.5px;margin-top:8px}
table.data-tb th,table.data-tb td{border:1px solid var(--line);padding:6px 9px;text-align:center}
table.data-tb th{background:var(--panel-2);font-weight:600}
table.data-tb td:first-child{text-align:left}
table.data-tb tbody tr:hover td{background:#fafcff}

.pick-grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.pick{border:1px solid var(--line);border-radius:11px;padding:11px 13px;background:#fff;text-align:left;transition:.15s;width:100%}
.pick:hover{border-color:var(--primary);background:var(--primary-l)}
.pick.active{border-color:var(--primary);background:var(--primary-l);box-shadow:0 0 0 3px rgba(76,110,245,.1)}
.pick .pt{font-size:14px;font-weight:600}
.pick .pd{font-size:12px;color:var(--text-3);margin-top:2px}

.stat-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:15px}
.stat-box .s-k{font-size:12px;color:var(--text-3)}
.stat-box .s-v{font-size:25px;font-weight:800;line-height:1.2}
.stat-box .s-sub{font-size:11.5px;color:var(--text-3)}

.list-item{display:flex;gap:12px;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:9px;align-items:center}
.list-item .li-main{flex:1;min-width:0}
.list-item .li-t{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.list-item .li-d{font-size:12.5px;color:var(--text-3);margin-top:2px}
.score-pill{font-size:14px;font-weight:800;padding:3px 11px;border-radius:20px;flex:0 0 auto}
.p1{background:var(--green-l);color:var(--green)}
.p2{background:var(--blue-l);color:var(--blue)}
.p3{background:var(--orange-l);color:var(--orange)}
.p4{background:var(--red-l);color:var(--red)}

/* ============ 弹层 / Toast ============ */
.mask{position:fixed;inset:0;background:rgba(17,24,39,.45);z-index:60;display:none}
.mask.show{display:block}
.sheet{
  position:fixed;left:50%;top:50%;transform:translate(-50%,-48%) scale(.97);
  width:min(720px,92vw);max-height:84vh;background:#fff;border-radius:16px;z-index:61;
  display:none;flex-direction:column;box-shadow:0 24px 60px rgba(15,23,42,.28);opacity:0;transition:.18s;
}
.sheet.show{display:flex;opacity:1;transform:translate(-50%,-50%) scale(1)}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;border-bottom:1px solid var(--line)}
.sheet-head h3{font-size:16px}
.sheet-body{padding:18px;overflow:auto}

.loading{position:fixed;inset:0;background:rgba(244,246,251,.86);backdrop-filter:blur(3px);z-index:80;display:none;align-items:center;justify-content:center}
.loading.show{display:flex}
.loading-box{text-align:center}
.spinner{
  width:44px;height:44px;margin:0 auto 14px;border-radius:50%;
  border:3px solid #d9e1f2;border-top-color:var(--primary);animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-text{font-size:15px;font-weight:600}
.loading-sub{font-size:12.5px;color:var(--text-3);margin-top:3px}

.toast-wrap{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(30px + var(--safe-b));z-index:90;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{
  background:#1f2937;color:#fff;padding:9px 18px;border-radius:22px;font-size:13.5px;box-shadow:0 8px 24px rgba(0,0,0,.2);
  animation:tin .25s ease;max-width:88vw;
}
.toast.err{background:var(--red)}
.toast.ok{background:var(--green)}
@keyframes tin{from{opacity:0;transform:translateY(10px)}}

/* ============ 移动端 ============ */
@media (max-width:900px){
  .sidebar{display:none}
  .view-wrap{padding:14px 14px 92px;max-width:100%}
  .topbar{padding:12px 14px}
  .topbar-title h1{font-size:17px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .g4.keep2,.g3.keep2,.g2.keep2{grid-template-columns:1fr 1fr}
  .grid{gap:11px}
  .card-pad{padding:14px}
  .score-hero{flex-direction:column;align-items:stretch;gap:14px;padding:16px}
  .score-big{flex:none;display:flex;align-items:center;justify-content:center;gap:14px}
  .score-big .num{font-size:38px}
  .score-big .band{margin:0}
  .score-meta{grid-template-columns:1fr 1fr}
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:50;background:rgba(255,255,255,.96);
    backdrop-filter:blur(10px);border-top:1px solid var(--line);
    padding:6px 4px calc(6px + var(--safe-b));
  }
  .tabbar button{
    flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 0;
    font-size:10.5px;color:var(--text-3);
  }
  .tabbar button .ico{font-size:19px;line-height:1}
  .tabbar button.active{color:var(--primary);font-weight:700}
  .sheet{width:94vw;max-height:88vh}
  .tabs button{flex:0 0 auto}
}
@media print{
  .sidebar,.topbar,.tabbar,.btn{display:none!important}
  .view-wrap{padding:0}
  .card{border:none;box-shadow:none}
}