/* =========================================================
 * style.css — 中考冲刺学习平台
 * =======================================================*/
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f2f5fb;
  --card: #ffffff;
  --ink: #1e293b;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #4f6ef7;
  --ok: #22b07d;
  --warn: #f59e0b;
  --bad: #ef5a7a;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(30, 41, 59, .07);
}
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  background: var(--bg); color: var(--ink); line-height: 1.65; min-height: 100vh;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 22px; background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.logo { font-size: 19px; font-weight: 800; color: var(--primary); text-decoration: none; }
.topnav { display: flex; align-items: center; gap: 18px; }
.topnav a { color: var(--muted); text-decoration: none; font-size: 14.5px; }
.topnav a:hover { color: var(--primary); }
.wrong-badge {
  background: #fef2f2; color: var(--bad) !important; border: 1px solid #fecdd3;
  border-radius: 999px; padding: 1px 12px; font-weight: 600; font-size: 13px !important;
}
#root { max-width: 1060px; margin: 0 auto; padding: 22px 20px 60px; }

/* ---------- 首页 ---------- */
.hero {
  text-align: center; padding: 44px 16px 34px; border-radius: 22px; margin-bottom: 18px;
  background: linear-gradient(135deg, #4f6ef7 0%, #7c3aed 55%, #0ea5e9 120%); color: #fff;
}
.hero h1 { font-size: 32px; letter-spacing: 2px; margin-bottom: 10px; }
.hero p { opacity: .92; font-size: 15px; max-width: 720px; margin: 0 auto; }
.stat-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
.stat {
  flex: 1; min-width: 150px; background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 14px 18px; display: flex; align-items: baseline; gap: 10px;
}
.stat b { font-size: 28px; color: var(--primary); }
.stat.ok b { color: var(--ok); } .stat.warn b { color: var(--bad); }
.stat span { color: var(--muted); font-size: 13.5px; }
.btn-line { color: var(--primary); text-decoration: none; font-size: 14px; font-weight: 600; }

.sec-title { font-size: 19px; margin: 8px 0 14px; }
.grid-subj { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.subj-card {
  position: relative; display: block; background: var(--card); border-radius: var(--radius);
  padding: 20px 18px 16px; text-decoration: none; color: inherit; box-shadow: var(--shadow);
  border-top: 4px solid var(--sc); transition: transform .15s ease, box-shadow .15s ease;
}
.subj-card:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(30,41,59,.13); }
.subj-icon { font-size: 30px; line-height: 1; margin-bottom: 8px; }
.subj-icon.big { font-size: 40px; }
.subj-name { font-size: 17.5px; font-weight: 800; color: var(--sc); margin-bottom: 2px; }
.subj-tag { font-size: 12.5px; color: var(--muted); min-height: 38px; margin-bottom: 10px; }
.subj-meta { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--muted); margin-bottom: 8px; }
.subj-bar { height: 6px; border-radius: 99px; background: #eef2f7; overflow: hidden; }
.subj-bar i { display: block; height: 100%; background: var(--sc); border-radius: 99px; transition: width .5s ease; }
.subj-wrong {
  position: absolute; top: 12px; right: 12px; background: #fef2f2; color: var(--bad);
  font-size: 11.5px; padding: 2px 9px; border-radius: 999px; border: 1px solid #fecdd3;
}

/* ---------- 科目页 ---------- */
.btn-back {
  background: none; border: none; color: var(--primary); cursor: pointer;
  font-size: 14px; margin-bottom: 14px; padding: 4px 2px;
}
.subj-head {
  display: flex; align-items: center; gap: 16px; background: var(--card);
  border-left: 6px solid var(--sc); border-radius: var(--radius); padding: 18px 22px;
  box-shadow: var(--shadow); margin-bottom: 18px;
}
.subj-head h1 { font-size: 24px; color: var(--sc); }
.subj-head p { color: var(--muted); font-size: 13.5px; }
.kp-list { display: flex; flex-direction: column; gap: 14px; }
.kp-row {
  display: flex; justify-content: space-between; gap: 20px; background: var(--card);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 20px;
}
.kp-main { flex: 1 1 58%; min-width: 0; }
.kp-title { font-size: 17px; font-weight: 700; color: var(--ink); text-decoration: none; }
.kp-title:hover { color: var(--sc); }
.kp-freq { margin: 4px 0 6px; font-size: 13px; color: var(--muted); }
.star { color: var(--warn); letter-spacing: 2px; margin-right: 8px; }
.kp-years { font-size: 12.5px; }
.kp-sum { font-size: 13.5px; color: var(--muted); }
.kp-side { flex: 1 1 42%; display: flex; flex-direction: column; justify-content: center; gap: 10px; }
.kp-btns { display: flex; gap: 8px; flex-wrap: wrap; }

/* 掌握度条 */
.mbar { display: flex; align-items: center; gap: 10px; font-size: 12.5px; }
.mbar-label { color: var(--muted); white-space: nowrap; }
.mbar-track {
  flex: 1; height: 8px; background: #eef2f7; border-radius: 99px; overflow: hidden;
}
.mbar-fill, .mbar-track i { display: block; height: 100%; border-radius: 99px; transition: width .5s ease; }
.mbar-num { font-weight: 700; white-space: nowrap; }

/* ---------- 考点页 ---------- */
.kp-head {
  display: flex; justify-content: space-between; align-items: center; gap: 18px;
  background: var(--card); border-left: 6px solid var(--sc); border-radius: var(--radius);
  padding: 18px 22px; box-shadow: var(--shadow); margin-bottom: 14px;
}
.kp-head h1 { font-size: 23px; margin-bottom: 4px; }
.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tab {
  padding: 8px 16px; border-radius: 999px; text-decoration: none; font-size: 14px;
  color: var(--muted); background: #fff; border: 1px solid var(--line);
}
.tab.on { background: var(--sc, var(--primary)); color: #fff; border-color: transparent; font-weight: 700; }

/* 讲解卡片 */
.learn-card, .qz-wrap, .result-wrap, .repair-intro, .empty-box, .chart-panel {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px 26px;
}
.learn-sum {
  font-size: 15.5px; background: #eef2ff; border-left: 4px solid var(--primary);
  padding: 12px 16px; border-radius: 8px; margin-bottom: 18px;
}
.learn-pt { margin-bottom: 16px; }
.learn-pt h3 { font-size: 15.5px; margin-bottom: 6px; color: var(--ink); }
.learn-pt p { font-size: 14px; color: #334155; }
.learn-chart { margin: 20px 0; text-align: center; }
.chart-box svg { max-width: 100%; height: auto; }
.chart-note { font-size: 12px; color: #94a3b8; margin-top: 6px; }
.chart-empty { padding: 30px; color: #94a3b8; }
.learn-tips ul { padding-left: 20px; font-size: 13.5px; color: #7c2d12; background: #fffbeb; border-radius: 8px; padding: 12px 12px 12px 32px; }
.learn-tips li { margin: 4px 0; }
.cta-row { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }

/* 图表动画 */
.ch-title { font-size: 14px; fill: #334155; font-weight: 600; }
.ch-grid { stroke: #edf1f7; stroke-width: 1; }
.ch-axis { stroke: #cbd5e1; stroke-width: 1.5; }
.ch-tick { font-size: 10.5px; fill: #94a3b8; }
.ch-lab { font-size: 12px; fill: #475569; }
.ch-val { font-size: 11px; fill: #64748b; font-weight: 600; }
.ch-leg { font-size: 12px; fill: #475569; }
.ch-pielab { font-size: 11.5px; fill: #ffffff; font-weight: 700; }
.ch-anim { animation: rise .6s ease both; transform-origin: bottom; }
@keyframes rise { from { transform: scaleY(.05); opacity: .3; } to { transform: scaleY(1); opacity: 1; } }

/* 按钮 */
.btn {
  display: inline-block; border: none; cursor: pointer; text-decoration: none; text-align: center;
  background: var(--primary); color: #fff; font-size: 14px; font-weight: 600;
  padding: 9px 18px; border-radius: 10px; transition: filter .15s, transform .1s;
}
.btn:hover { filter: brightness(1.08); } .btn:active { transform: scale(.97); }
.btn.mini { padding: 5px 13px; font-size: 12.5px; border-radius: 8px; }
.btn.big { padding: 12px 34px; font-size: 15.5px; }
.btn.ghost { background: #eef2ff; color: var(--primary); }
.btn.warn { background: var(--warn); }
.btn.danger { background: #fef2f2; color: var(--bad); border: 1px solid #fecdd3; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- 练习 ---------- */
.lvl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.lvl-card {
  border: 2px solid var(--line); background: #fff; border-radius: var(--radius);
  padding: 20px 18px; cursor: pointer; text-align: left; transition: all .15s;
  display: flex; flex-direction: column; gap: 6px;
}
.lvl-card b { font-size: 16.5px; }
.lvl-card span { font-size: 12.5px; color: var(--muted); }
.lvl-card em { font-style: normal; font-size: 12.5px; color: var(--primary); font-weight: 700; }
.lvl-card.lv1:hover { border-color: var(--ok); } .lvl-card.lv2:hover { border-color: var(--warn); }
.lvl-card.lv3:hover { border-color: var(--bad); }
.hint { font-size: 12.5px; color: #94a3b8; margin-top: 14px; }

.qz-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; color: var(--muted); font-size: 13px; }
.qz-lvl { font-weight: 700; }
.qz-lvl.lv1 { color: var(--ok); } .qz-lvl.lv2 { color: var(--warn); } .qz-lvl.lv3 { color: var(--bad); }
.lv-tag { font-size: 11px; border-radius: 6px; padding: 1px 7px; margin-left: 8px; vertical-align: middle; }
.lv-tag.lv1, .lv1-tag { background: #ecfdf5; color: var(--ok); }
.lv-tag.lv2 { background: #fffbeb; color: #b45309; }
.lv-tag.lv3 { background: #fef2f2; color: var(--bad); }
.qz-q { font-size: 15.5px; font-weight: 600; margin-bottom: 14px; }
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opts.col { grid-template-columns: 1fr; }
.opt {
  border: 1.5px solid var(--line); background: #fafbfd; border-radius: 10px;
  padding: 11px 14px; font-size: 14px; cursor: pointer; text-align: left; transition: all .12s;
}
.opt:hover:not(:disabled) { border-color: var(--primary); background: #f5f7ff; }
.opt.picked { border-color: var(--primary); background: #eef2ff; }
.opt.right { border-color: var(--ok); background: #ecfdf5; }
.opt.wrongpick { border-color: var(--bad); background: #fef2f2; }
.opt-line {
  display: flex; gap: 10px; align-items: baseline; border: 1.5px solid var(--line);
  border-radius: 10px; padding: 10px 14px; font-size: 14px; cursor: pointer; transition: border-color .12s;
}
.opt-line:hover { border-color: var(--primary); }
.opt-line input { accent-color: var(--primary); }
.explain { border-radius: 10px; padding: 13px 16px; font-size: 13.5px; margin-top: 14px; }
.explain.good { background: #ecfdf5; color: #065f46; }
.explain.bad { background: #fef2f2; color: #9f1239; }

.paper-q { border: none; margin-bottom: 20px; border-top: 1px dashed var(--line); padding-top: 16px; }
.paper-q legend { font-size: 13px; color: var(--muted); font-weight: 700; padding-right: 8px; }

.center { text-align: center; }
.big-score { font-size: 64px; font-weight: 900; line-height: 1.1; }
.big-score small { font-size: 20px; color: var(--muted); font-weight: 500; }

/* 测试列表 */
.exam-list { display: flex; flex-direction: column; gap: 12px; }
.exam-row {
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  border: 2px solid var(--line); border-left-width: 6px; border-radius: var(--radius);
  padding: 15px 20px; background: #fff;
}
.exam-row.lv1 { border-left-color: var(--ok); }
.exam-row.lv2 { border-left-color: var(--warn); }
.exam-row.lv3 { border-left-color: var(--bad); }
.exam-row b { font-size: 15.5px; display: block; }
.exam-row span { font-size: 12.5px; color: var(--muted); }
.exam-row em.best { display: block; font-style: normal; font-size: 12px; color: var(--primary); font-weight: 700; margin-top: 2px; }
.pass-note { margin-top: 16px; font-size: 13px; color: var(--muted); background: #f8fafc; border-radius: 10px; padding: 12px 16px; }

/* 巩固 */
.wrong-list { margin: 10px 0 14px; padding-left: 22px; font-size: 13.5px; color: #475569; }
.wrong-list li { margin: 3px 0; }
.empty-box { text-align: center; color: var(--muted); padding: 40px 20px !important; }

/* 结果 */
.result-wrap { margin-top: 4px; }
.result-score { display: flex; align-items: center; gap: 22px; margin-bottom: 18px; }
.result-score h2 { font-size: 21px; margin-bottom: 4px; }
.result-score p { color: var(--muted); font-size: 14px; }
.ring {
  --p: 0; --c: var(--primary);
  width: 110px; height: 110px; border-radius: 50%; flex-shrink: 0;
  background: conic-gradient(var(--c) calc(var(--p)*1%), #e8edf5 0);
  display: flex; align-items: center; justify-content: center; position: relative;
}
.ring::before { content: ''; position: absolute; inset: 10px; background: #fff; border-radius: 50%; }
.ring b { position: relative; font-size: 34px; color: var(--c); z-index: 1; }
.ring small { position: relative; z-index: 1; color: var(--muted); font-size: 13px; }
.analysis { background: #eff6ff; border-left: 4px solid var(--primary); border-radius: 8px; padding: 13px 16px; font-size: 13.5px; margin-bottom: 18px; }
.cleared { color: var(--ok); font-weight: 700; margin-top: 6px; }
.notyet { color: var(--warn); font-weight: 600; margin-top: 6px; }
.review { border: 1px solid var(--line); border-radius: 12px; padding: 15px 18px; margin-bottom: 12px; }
.review.ok { border-left: 5px solid var(--ok); }
.review.bad { border-left: 5px solid var(--bad); }
.rv-head { font-size: 13px; font-weight: 700; margin-bottom: 8px; color: #334155; }
.review.bad .rv-head { color: var(--bad); }
.rv-exp { font-size: 13px; color: var(--muted); background: #f8fafc; border-radius: 8px; padding: 9px 12px; }

/* ---------- 我的学习 ---------- */
.me-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.me-head h1 { font-size: 25px; }
.danger-zone { background: none; border: 1px solid #fecdd3; color: var(--bad); border-radius: 10px; padding: 7px 14px; cursor: pointer; font-size: 13px; }
.chart-panel { margin-bottom: 24px; }
.me-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; margin-bottom: 24px; }
.me-cell {
  display: flex; flex-direction: column; gap: 6px; background: var(--card); border-radius: 12px;
  box-shadow: var(--shadow); padding: 14px 16px; text-decoration: none; color: inherit;
  border-top: 3px solid var(--sc); font-size: 13.5px;
}
.me-cell b { font-size: 14.5px; }
.me-cell em { font-style: normal; font-size: 12px; color: var(--muted); align-self: flex-end; }
.me-subj { font-size: 11.5px; color: var(--muted); }
.hist-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.hist-table th, .hist-table td { padding: 10px 14px; font-size: 13.5px; text-align: left; }
.hist-table th { background: #f8fafc; color: var(--muted); font-weight: 600; }
.hist-table tr + tr td { border-top: 1px solid var(--line); }
.hist-table td[style] { font-weight: 700; }

.foot { text-align: center; color: #94a3b8; font-size: 12px; margin-top: 36px; }
.empty { text-align: center; color: var(--muted); padding: 40px; }

@media (max-width: 640px) {
  .kp-row, .kp-head, .result-score { flex-direction: column; align-items: stretch; }
  .opts { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  #root { padding: 14px 12px 50px; }
}

/* ---------- 登录 / 注册门禁 ---------- */
#auth-screen {
  position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #4f6ef7 0%, #7c3aed 55%, #0ea5e9 120%); padding: 20px;
}
.auth-card {
  width: min(420px, 94vw); background: #fff; border-radius: 20px; padding: 34px 34px 26px;
  box-shadow: 0 24px 60px rgba(0,0,0,.28); text-align: center;
}
.auth-logo { font-size: 44px; line-height: 1; margin-bottom: 8px; }
.auth-card h1 { font-size: 21px; margin-bottom: 4px; }
.auth-sub { font-size: 12.5px; color: var(--muted); margin-bottom: 20px; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 16px; background: #eef2f7; border-radius: 12px; padding: 4px; }
.auth-tabs button {
  flex: 1; border: none; background: transparent; padding: 9px; border-radius: 9px;
  font-size: 14.5px; cursor: pointer; color: var(--muted); font-weight: 600;
}
.auth-tabs button.on { background: #fff; color: var(--primary); box-shadow: var(--shadow); }
#auth-screen input {
  width: 100%; border: 1.5px solid var(--line); border-radius: 10px; padding: 11px 14px;
  font-size: 14px; margin-bottom: 12px; outline: none; transition: border-color .15s;
}
#auth-screen input:focus { border-color: var(--primary); }
#auth-error { display: none; color: var(--bad); font-size: 13px; text-align: left; margin: -4px 0 10px 2px; }
#auth-submit {
  width: 100%; border: none; background: var(--primary); color: #fff; font-size: 15.5px;
  font-weight: 700; letter-spacing: 2px; padding: 12px; border-radius: 10px; cursor: pointer;
}
#auth-submit:hover { filter: brightness(1.08); }
#auth-submit:disabled { opacity: .55; }
#auth-hint { font-size: 12px; color: var(--warn); margin-top: 12px; text-align: left; }

/* ---------- 顶栏用户区 ---------- */
.nav-user { font-size: 13px; color: var(--ink); font-weight: 600; white-space: nowrap; }
.logout-btn {
  border: 1px solid var(--line); background: #fff; color: var(--muted); border-radius: 8px;
  padding: 4px 12px; font-size: 12.5px; cursor: pointer;
}
.logout-btn:hover { color: var(--bad); border-color: #fecdd3; }

/* ---------- 年级筛选与徽章 ---------- */
.chips { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.chip {
  border: 1.5px solid var(--line); background: #fff; color: var(--muted); border-radius: 999px;
  padding: 6px 18px; font-size: 13.5px; cursor: pointer;
}
.chip.on { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 700; }
.grade-badge {
  display: inline-block; vertical-align: 2px; font-size: 11px; font-weight: 700;
  border-radius: 6px; padding: 1px 7px; margin-left: 8px;
}
.gb-初一 { background: #ecfdf5; color: #059669; }
.gb-初二 { background: #eff6ff; color: #2563eb; }
.gb-初三 { background: #fef2f2; color: #dc2626; }

/* ---------- 真题来源标签 ---------- */
.src-tag {
  display: inline-block; background: #fffbeb; border: 1px solid #fde68a; color: #92400e;
  font-size: 11px; border-radius: 6px; padding: 0 7px; margin-right: 6px; vertical-align: 1px;
}

.exam-row.real { border-left-color: var(--warn); }

/* ===================== 综合模拟考试 ===================== */
.mock-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:20px}
.mock-card{position:relative;display:flex;flex-direction:column;gap:8px;background:#fff;border:1.5px solid #e6e9f2;border-radius:14px;padding:14px 16px;box-shadow:0 2px 10px rgba(30,40,80,.05);transition:transform .15s,box-shadow .15s;border-top:4px solid var(--mk,#7b8cff)}
.mock-card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(30,40,80,.12)}
.mk-month{--mk:#5aa9ff}.mk-quarter{--mk:#8f7bff}.mk-midterm{--mk:#ff9a3d}.mk-final{--mk:#ef5a7a}
.mk-head{display:flex;align-items:center;gap:8px;font-size:17px}
.mk-icon{font-size:22px}
.mk-desc{font-size:12.5px;color:#667;line-height:1.5}
.mk-meta{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-top:auto}
.mk-meta em{font-style:normal;font-size:12px;color:#99a}
.mk-best{font-size:13px;font-weight:700}
.mk-best.none{color:#b9c0d0;font-weight:500}
.mk-go{align-self:flex-start}

/* 模考整卷页头 */
.mock-exam-head .kp-freq{color:#8892ab}