/* ============================================================
   学科成绩分析工作台 · 设计系统
   主题：清爽教育蓝 + 掌握度语义色（绿/琥珀/红）
   响应式、iPad 友好
   ============================================================ */
:root{
  --primary:#4c6ef5;
  --primary-d:#3b5bdb;
  --primary-l:#edf0fe;
  --teal:#0ca678;
  --green:#2f9e44;
  --amber:#f59f00;
  --red:#e03131;
  --red-l:#fff0f0;
  --ink:#1f2937;
  --muted:#6b7280;
  --line:#e6eaf2;
  --bg:#f4f6fb;
  --surface:#ffffff;
  --shadow:0 6px 24px rgba(31,41,55,.08);
  --shadow-s:0 2px 8px rgba(31,41,55,.06);
  --radius:16px;
  --radius-s:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,sans-serif;
  background:var(--bg);color:var(--ink);font-size:15px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;cursor:pointer;border:none;background:none}
a{color:var(--primary);text-decoration:none}

/* ---------- 登录页 ---------- */
.login-wrap{
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:50;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#4c6ef5 0%,#7048e8 100%);
  padding:24px;overflow:auto;
}
.login-split{
  display:flex;width:100%;max-width:960px;border-radius:24px;overflow:hidden;
  box-shadow:0 24px 70px rgba(0,0,0,.28);min-height:560px;background:#fff;
}
.login-intro{
  flex:1.1;background:linear-gradient(150deg,#3b45c9 0%,#5a25bf 100%);
  color:#fff;padding:46px 40px;display:flex;flex-direction:column;
}
.li-brand{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:700;margin-bottom:6px}
.li-brand .mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#4c6ef5,#7048e8);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:19px}
.li-tag{opacity:1;font-size:14px;font-weight:500;margin:0 0 30px}
.li-h{font-size:16px;font-weight:700;margin:0 0 16px}
.li-list{list-style:none;padding:0;margin:0 0 auto;display:flex;flex-direction:column;gap:14px}
.li-list li{font-size:13.5px;line-height:1.7;opacity:1;padding-left:18px;position:relative}
.li-list li:before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:#ffd43b}
.li-list b{color:#fff}
.li-flow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:30px;font-size:12.5px;opacity:1}
.li-flow i{opacity:.7;font-style:normal}
.li-flow span{background:rgba(255,255,255,.22);color:#fff;font-weight:600;padding:5px 10px;border-radius:8px}
.login-card{
  flex:1.25;max-width:600px;background:#fff;padding:44px 40px;display:flex;flex-direction:column;justify-content:center;
}
.login-card .logo{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.login-card .logo .mark{
  width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,#4c6ef5,#7048e8);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:20px;
}
.login-card h1{font-size:22px;font-weight:700}
.login-card .sub{color:var(--muted);font-size:13px;margin:8px 0 22px}
/* 登录双栏：管理员 / 家长 */
.login-cols{display:flex;gap:22px;align-items:stretch}
.login-col{flex:1;min-width:0;display:flex;flex-direction:column}
.login-col .field{margin-bottom:14px}
.login-divider{width:1px;background:var(--line);flex-shrink:0}
.col-h{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;margin-bottom:2px}
.col-ic{width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:700}
.ic-a{background:linear-gradient(135deg,#4c6ef5,#7048e8)}
.ic-p{background:linear-gradient(135deg,#12b886,#0ca678)}
.col-sub{font-size:12px;color:var(--muted);margin-bottom:14px}
.col-tip{font-size:11.5px;color:var(--muted);text-align:center;margin-top:auto;padding-top:10px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:600}
.field input{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius-s);
  font-size:15px;transition:.2s;background:#fbfcfe;
}
.field input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px var(--primary-l)}
.login-tip{font-size:12px;color:var(--muted);margin-top:16px;line-height:1.6;text-align:center}
.demo-only{margin-top:12px}

/* ---------- 主框架 ---------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:240px;flex-shrink:0;background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.sb-logo{display:flex;align-items:center;gap:10px;padding:20px 20px 14px}
.sb-logo .mark{
  width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#4c6ef5,#7048e8);
  color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:17px;
}
.sb-logo .t{font-weight:700;font-size:15px;line-height:1.2}
.sb-logo .t small{display:block;font-weight:400;font-size:11px;color:var(--muted)}
.sb-nav{flex:1;padding:8px 12px;overflow-y:auto}
.sb-nav a{
  display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:10px;
  color:var(--muted);font-weight:500;font-size:14px;margin-bottom:4px;transition:.15s;
}
.sb-nav a svg{width:18px;height:18px;flex-shrink:0}
.sb-nav a:hover{background:var(--bg);color:var(--ink)}
.sb-nav a.active{background:var(--primary-l);color:var(--primary-d);font-weight:600}
.sb-foot{padding:14px 18px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}

.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{
  height:64px;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:5;
}
.topbar .title{font-size:18px;font-weight:700}
.topbar .title small{display:block;font-size:12px;color:var(--muted);font-weight:400}
.topbar .right{display:flex;align-items:center;gap:14px}
.role-badge{padding:5px 12px;border-radius:20px;font-size:12px;font-weight:600}
.role-admin{background:#fff0f6;color:#c2255c}
.role-user{background:var(--primary-l);color:var(--primary-d)}
.btn-logout{display:inline-flex;align-items:center;gap:5px;padding:7px 13px;border-radius:9px;font-size:13px;font-weight:600;cursor:pointer;background:var(--bg);color:var(--muted);border:1px solid var(--line);transition:.15s}
.btn-logout:hover{border-color:#ef4444;color:#ef4444;background:#fef2f2}
.btn-logout svg{display:block}
.avatar{
  width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#4c6ef5,#7048e8);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;
}
.content{padding:28px;flex:1;overflow-y:auto}

/* ---------- 通用卡片/按钮 ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-s);padding:22px}
.card h3{font-size:16px;font-weight:700;margin-bottom:4px}
.card .desc{color:var(--muted);font-size:13px;margin-bottom:16px}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1100px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:820px){.sidebar{display:none}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.login-intro{display:none}.login-card{flex:1;max-width:100%}.login-split{min-height:0}}
@media(max-width:620px){.login-cols{flex-direction:column;gap:18px}.login-divider{width:auto;height:1px;margin:2px 0}.login-card{padding:34px 24px}.login-tip{margin-top:18px}}

.btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-s);
  font-size:14px;font-weight:600;transition:.18s;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-ghost{background:var(--bg);color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:7px 13px;font-size:13px}

.stat{display:flex;flex-direction:column;gap:6px}
.stat .num{font-size:30px;font-weight:800;line-height:1}
.stat .lab{font-size:13px;color:var(--muted)}
.stat .ic{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:6px}
.ic-blue{background:var(--primary-l);color:var(--primary-d)}
.ic-green{background:#e6fcf0;color:var(--green)}
.ic-amber{background:#fff4e0;color:var(--amber)}
.ic-red{background:var(--red-l);color:var(--red)}

/* ---------- 标签 / 徽章 ---------- */
.tag{padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600;display:inline-block}
.tag-base{background:#e7f5ff;color:#1c7ed6}
.tag-mid{background:#fff4e0;color:#e8920c}
.tag-hard{background:#fde8f0;color:#c2255c}
.tag-ok{background:#e6fcf0;color:var(--green)}
.tag-warn{background:#fff4e0;color:var(--amber)}
.tag-bad{background:var(--red-l);color:var(--red)}
.tag-gray{background:var(--bg);color:var(--muted)}

/* ---------- 试卷上传/审核 ---------- */
.upload-zone{
  border:2px dashed #c5cde0;border-radius:var(--radius);padding:48px;text-align:center;
  background:linear-gradient(180deg,#fafbff,#f4f6fb);transition:.2s;cursor:pointer;
}
.upload-zone:hover{border-color:var(--primary);background:#f0f3ff}
.upload-zone .big{font-size:46px;margin-bottom:10px}
.q-list{display:flex;flex-direction:column;gap:12px}
.q-item{
  display:flex;gap:14px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line);
  border-radius:var(--radius-s);background:#fff;transition:.15s;
}
.q-item.wrong{border-color:#ffc9c9;background:var(--red-l)}
.q-no{width:34px;height:34px;flex-shrink:0;border-radius:9px;background:var(--primary-l);color:var(--primary-d);
  font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px}
.q-item.wrong .q-no{background:var(--red);color:#fff}
.q-body{flex:1;min-width:0}
.q-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.q-actions{display:flex;flex-direction:column;gap:6px;flex-shrink:0}
.mini-btn{padding:5px 10px;border-radius:8px;font-size:12px;font-weight:600;border:1px solid var(--line);background:#fff;color:var(--muted)}
.mini-btn.on-ok{border-color:var(--green);color:var(--green);background:#e6fcf0}
.mini-btn.on-del{border-color:var(--red);color:var(--red);background:var(--red-l)}

/* ---------- 报告 ---------- */
.report-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:18px}
.seg{display:inline-flex;background:var(--bg);border-radius:10px;padding:4px}
.seg button{padding:7px 16px;border-radius:8px;font-size:13px;font-weight:600;color:var(--muted)}
.seg button.active{background:#fff;color:var(--primary-d);box-shadow:var(--shadow-s)}
.chart{width:100%;height:320px}
.chart-s{height:260px}
.kp-bar{display:flex;flex-direction:column;gap:10px}
.kp-row{display:flex;align-items:center;gap:12px}
.kp-row .name{width:160px;font-size:13px;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.kp-track{flex:1;height:10px;background:var(--bg);border-radius:6px;overflow:hidden}
.kp-fill{height:100%;border-radius:6px}
.weak-list{display:flex;flex-direction:column;gap:10px}
.weak-item{display:flex;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-s);background:#fff}
.weak-rank{width:26px;height:26px;border-radius:50%;background:var(--red);color:#fff;font-weight:700;font-size:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.priority-note{font-size:12px;color:var(--muted);margin-top:4px}
.roadmap{display:flex;flex-direction:column;gap:0;margin-top:6px}
.road-step{display:flex;gap:14px;padding:10px 0;border-left:2px solid var(--line);padding-left:18px;position:relative}
.road-step::before{content:"";position:absolute;left:-7px;top:14px;width:12px;height:12px;border-radius:50%;background:var(--primary)}
.road-step.s2::before{background:var(--amber)}
.road-step.s3::before{background:var(--red)}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.tbl th{font-size:12px;color:var(--muted);font-weight:600;text-transform:none;background:var(--bg)}
.tbl tr:hover td{background:#fafbff}
.tbl tbody tr:last-child td{border-bottom:none}

/* ---------- 管理员 ---------- */
.admin-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.kpi{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-s)}
.kpi .num{font-size:28px;font-weight:800}
.kpi .lab{font-size:13px;color:var(--muted);margin-top:4px}
.notice{background:#fff8e6;border:1px solid #ffe08a;color:#8a6d00;padding:12px 16px;border-radius:var(--radius-s);font-size:13px;margin-bottom:18px}
.section-title{font-size:15px;font-weight:700;margin:6px 0 14px;display:flex;align-items:center;gap:8px}
.page{animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.empty{text-align:center;color:var(--muted);padding:40px;font-size:14px}
.hidden{display:none!important}
.flex{display:flex}.between{justify-content:space-between}.center{align-items:center}.gap10{gap:10px}.gap16{gap:16px}.wrap{flex-wrap:wrap}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mb8{margin-bottom:8px}.mb16{margin-bottom:16px}
.right{text-align:right}.w100{width:100%}.muted{color:var(--muted)}

/* 弹窗 / 提示 */
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}
.modal{background:#fff;border-radius:14px;width:380px;max-width:100%;box-shadow:0 20px 60px rgba(0,0,0,.25);overflow:hidden}
.modal-h{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;font-size:16px;font-weight:600;border-bottom:1px solid #eef0f4}
.modal-x{cursor:pointer;font-size:22px;line-height:1;color:#9aa3b2}
.modal-b{padding:18px 20px;display:flex;flex-direction:column;gap:14px}
.modal-b label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#475569}
.inp{border:1px solid #d4d9e2;border-radius:8px;padding:9px 11px;font-size:14px;outline:none}
.inp:focus{border-color:#4c6ef5}
.modal-f{padding:14px 20px;border-top:1px solid #eef0f4;display:flex;justify-content:flex-end;gap:10px}
#toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);background:#1f2937;color:#fff;padding:10px 18px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:1100}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}