/* ==========================================================
   学趣闯关营 · 设计系统
   暖纸底 + 墨绿主色 + 柿子橙强调；圆角卡片 + 轻投影
   ========================================================== */
:root{
  --paper:#f7f4ed;
  --paper-2:#fffdf9;
  --card:#ffffff;
  --ink:#22302b;
  --ink-2:#4b5a54;
  --ink-3:#7d8a84;
  --line:#e6e0d4;
  --brand:#2f6b53;
  --brand-2:#3d8a6a;
  --brand-soft:#e6f1ea;
  --accent:#e2703a;
  --accent-soft:#fdeee5;
  --gold:#e0a91b;
  --gold-soft:#fdf4d9;
  --danger:#c0483c;
  --danger-soft:#fbeceb;
  --blue:#3a6ea5;
  --blue-soft:#eaf1f8;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 1px 2px rgba(34,48,43,.05), 0 8px 24px -12px rgba(34,48,43,.18);
  --shadow-lg:0 24px 60px -24px rgba(34,48,43,.35);
  --side-w:236px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
html[data-theme="dark"]{
  --paper:#151a18;
  --paper-2:#1b211e;
  --card:#202724;
  --ink:#eaf1ec;
  --ink-2:#c2cec7;
  --ink-3:#8b9a92;
  --line:#2c3531;
  --brand:#5bb98d;
  --brand-2:#79cba4;
  --brand-soft:#1f3129;
  --accent:#f08a55;
  --accent-soft:#33241c;
  --gold:#e8bb43;
  --gold-soft:#332b14;
  --danger:#e0796d;
  --danger-soft:#331e1c;
  --blue:#7aa9d6;
  --blue-soft:#1c2732;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 10px 30px -14px rgba(0,0,0,.6);
  --shadow-lg:0 30px 70px -30px rgba(0,0,0,.8);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  background:var(--paper);
  color:var(--ink);
  font-size:15px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(760px 420px at 12% -8%, rgba(226,112,58,.10), transparent 62%),
    radial-gradient(680px 400px at 100% 0%, rgba(47,107,83,.12), transparent 60%);
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0 0 10px}
ul,ol{margin:0 0 10px;padding-left:20px}
button{font-family:inherit}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;z-index:99;background:var(--card);padding:8px 12px;border-radius:8px}

/* ---------------- 布局 ---------------- */
.app{display:flex;min-height:100vh;position:relative;z-index:1}
.side{
  width:var(--side-w);flex:0 0 var(--side-w);
  padding:20px 14px;
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:16px;
  position:sticky;top:0;height:100vh;
  background:linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,0));
}
html[data-theme="dark"] .side{background:linear-gradient(180deg, rgba(255,255,255,.03), transparent)}
.brand{display:flex;align-items:center;gap:10px;padding:0 6px}
.logo{
  width:38px;height:38px;border-radius:12px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(145deg,var(--accent),#c9552a);
  color:#fff;font-weight:800;font-size:19px;
  box-shadow:0 6px 16px -8px rgba(226,112,58,.9);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-txt strong{font-size:15px}
.brand-txt span{font-size:11px;color:var(--ink-3);letter-spacing:.08em;text-transform:uppercase}
.nav{display:flex;flex-direction:column;gap:2px;overflow-y:auto;flex:1}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 11px;border-radius:11px;
  color:var(--ink-2);font-size:14px;font-weight:500;
  border:0;background:none;cursor:pointer;text-align:left;width:100%;
  transition:.15s;
}
.nav-item:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.nav-item.on{background:var(--brand);color:#fff;box-shadow:0 8px 18px -12px rgba(47,107,83,.9)}
.nav-item .ic{font-size:16px;width:20px;text-align:center;flex:none}
.nav-group{font-size:11px;color:var(--ink-3);padding:12px 11px 4px;letter-spacing:.08em}
.side-foot{display:flex;flex-direction:column;gap:8px;border-top:1px solid var(--line);padding-top:12px}
.streak{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);padding:4px 8px}
.streak .fire{font-size:16px}
.streak b{color:var(--accent);font-size:15px}

.shell{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;gap:12px;
  padding:12px 26px;
  border-bottom:1px solid var(--line);
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:blur(12px);
}
.topbar-title{font-weight:700;font-size:16px}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:8px}
.chip{
  font-size:12.5px;padding:5px 11px;border-radius:999px;
  background:var(--card);border:1px solid var(--line);color:var(--ink-2);
  white-space:nowrap;
}
.chip b{color:var(--ink);font-size:13px}
.main{padding:26px;max-width:1180px;width:100%;margin:0 auto;flex:1}
.foot{
  display:flex;gap:8px;flex-wrap:wrap;align-items:center;
  padding:18px 26px 28px;color:var(--ink-3);font-size:12px;
}
.foot .dot{opacity:.5}
.tabbar{display:none}

/* ---------------- 基础组件 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 16px;border-radius:11px;border:1px solid var(--line);
  background:var(--card);color:var(--ink);font-size:14px;font-weight:600;
  cursor:pointer;transition:.15s;white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn:active{transform:none}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.accent{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.ghost{background:transparent}
.btn.sm{padding:6px 12px;font-size:13px;border-radius:9px}
.btn.lg{padding:13px 24px;font-size:15.5px;border-radius:14px}
.btn.block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.icon-btn{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  background:var(--card);color:var(--ink);cursor:pointer;font-size:16px;
  display:grid;place-items:center;
}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);
}
.card.flat{box-shadow:none}
.card.tight{padding:14px}
.card-h{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.card-h h3{font-size:15.5px}
.card-h .sub{font-size:12.5px;color:var(--ink-3);font-weight:400}
.card-h .right{margin-left:auto;display:flex;gap:8px;align-items:center}
.grid{display:grid;gap:16px}
.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))}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spread{display:flex;justify-content:space-between;align-items:center;gap:10px}
.muted{color:var(--ink-3)}
.small{font-size:12.5px}
.tiny{font-size:11.5px}
.center{text-align:center}
.pill{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:600;background:var(--brand-soft);color:var(--brand)}
.pill.warn{background:var(--gold-soft);color:#8a6a08}
.pill.danger{background:var(--danger-soft);color:var(--danger)}
.pill.blue{background:var(--blue-soft);color:var(--blue)}
.pill.gray{background:var(--paper);color:var(--ink-3)}
.divider{height:1px;background:var(--line);margin:14px 0}
.hr-soft{height:1px;background:var(--line);margin:10px 0;opacity:.7}
.empty{padding:34px 16px;text-align:center;color:var(--ink-3);font-size:13.5px}
.empty .big{font-size:34px;display:block;margin-bottom:8px;opacity:.7}

/* 进度条 */
.bar{height:9px;border-radius:999px;background:var(--line);overflow:hidden}
.bar > i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .5s cubic-bezier(.2,.8,.2,1)}
.bar.accent > i{background:linear-gradient(90deg,var(--accent),#f0a06d)}
.bar.gold > i{background:linear-gradient(90deg,var(--gold),#f2cd6a)}

/* 环形进度 */
.ring{position:relative;display:grid;place-items:center}
.ring svg{transform:rotate(-90deg)}
.ring .ring-txt{position:absolute;text-align:center;line-height:1.15}
.ring .ring-txt b{display:block;font-size:24px;font-weight:800}
.ring .ring-txt span{font-size:11px;color:var(--ink-3)}

/* ---------------- 首页 ---------------- */
.hero{
  display:grid;grid-template-columns:1fr 300px;gap:20px;
  background:
    radial-gradient(520px 240px at 88% -30%, var(--brand-soft), transparent 70%),
    var(--card);
  border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow);
}
.hero .row .btn{flex:0 0 auto}
.hero h1{font-size:23px;margin-bottom:6px}
.hero .lead{color:var(--ink-2);font-size:14px;margin-bottom:16px}
.hero-side{display:flex;flex-direction:column;gap:12px;justify-content:center;align-items:center}
.quick{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:10px;margin-top:6px}
.quick a{
  display:flex;flex-direction:column;gap:4px;align-items:flex-start;
  padding:12px;border-radius:14px;border:1px solid var(--line);background:var(--paper-2);
  color:var(--ink);font-size:13px;font-weight:600;transition:.15s;
}
.quick a:hover{transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none;border-color:var(--brand-2)}
.quick a .q-ic{font-size:19px}
.quick a small{color:var(--ink-3);font-weight:400;font-size:11.5px}

.stat{display:flex;flex-direction:column;gap:2px;padding:14px;border-radius:14px;background:var(--paper-2);border:1px solid var(--line)}
.stat .k{font-size:11.5px;color:var(--ink-3)}
.stat .v{font-size:21px;font-weight:800;letter-spacing:-.02em}
.stat .v small{font-size:11px;font-weight:600;color:var(--ink-3);margin-left:2px}

.timeline{display:flex;flex-direction:column;gap:0}
.tl-item{display:grid;grid-template-columns:58px 16px 1fr;gap:10px;align-items:start;position:relative}
.tl-item .t{font-size:11.5px;color:var(--ink-3);padding-top:10px;font-variant-numeric:tabular-nums}
.tl-item .dotline{display:flex;flex-direction:column;align-items:center;height:100%;padding-top:14px}
.tl-item .dotline i{width:9px;height:9px;border-radius:50%;background:var(--line);flex:none}
.tl-item .dotline em{width:2px;flex:1;background:var(--line);min-height:18px}
.tl-item.done .dotline i{background:var(--brand)}
.tl-item.now .dotline i{background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.tl-item:last-child .dotline em{display:none}
.tl-body{display:flex;align-items:center;gap:10px;padding:8px 0 8px 0;border-bottom:1px dashed transparent}
.tl-item .task{font-size:13.5px}
.tl-item.done .task{color:var(--ink-3)}

/* ---------------- 关卡地图 ---------------- */
.zones{display:flex;flex-direction:column;gap:20px}
.zone{border:1px solid var(--line);border-radius:20px;background:var(--card);overflow:hidden;box-shadow:var(--shadow)}
.zone-h{display:flex;align-items:center;gap:12px;padding:16px 20px;cursor:pointer;user-select:none}
.zone-h:hover{background:var(--paper-2)}
.zone-ic{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-size:21px;background:var(--paper-2);border:1px solid var(--line);flex:none}
.zone-h h3{font-size:15.5px}
.zone-h .zs{font-size:12px;color:var(--ink-3)}
.zone-body{padding:0 20px 18px;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.zone-body[hidden]{display:none}
.lv{
  border:1px solid var(--line);border-radius:15px;padding:13px 14px;background:var(--paper-2);
  display:flex;flex-direction:column;gap:6px;cursor:pointer;transition:.16s;position:relative;text-align:left;
}
.lv:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--brand-2)}
.lv .lv-t{font-size:13.5px;font-weight:700;line-height:1.4}
.lv .lv-m{font-size:11.5px;color:var(--ink-3)}
.lv .lv-f{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--ink-3);margin-top:2px}
.lv .stars{color:var(--gold);letter-spacing:1px;font-size:12px}
.lv.done{border-color:var(--brand-2);background:var(--brand-soft)}
.lv .lv-badge{position:absolute;right:10px;top:10px;font-size:11px;color:var(--brand)}

/* 答题 */
.quiz{max-width:760px;margin:0 auto}
.npc{display:flex;gap:12px;align-items:flex-start;background:var(--brand-soft);border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.npc .av{width:40px;height:40px;border-radius:50%;background:linear-gradient(145deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;font-size:18px;flex:none}
.npc .say{font-size:13.5px;color:var(--ink-2)}
.npc .say b{color:var(--brand)}
.qbox{margin-top:18px}
.qbox .qnum{font-size:12px;color:var(--ink-3);margin-bottom:6px}
.qbox .qt{font-size:17px;font-weight:700;line-height:1.55;margin-bottom:14px}
.opt{
  display:flex;gap:10px;align-items:flex-start;width:100%;text-align:left;
  padding:13px 15px;border-radius:13px;border:1.5px solid var(--line);
  background:var(--card);cursor:pointer;margin-bottom:9px;transition:.14s;font-size:14.5px;color:var(--ink);
}
.opt:hover{border-color:var(--brand-2);background:var(--brand-soft)}
.opt .k{
  width:22px;height:22px;border-radius:7px;background:var(--paper);border:1px solid var(--line);
  display:grid;place-items:center;font-size:11.5px;font-weight:700;flex:none;margin-top:1px;color:var(--ink-2)
}
.opt.ok{border-color:var(--brand);background:var(--brand-soft)}
.opt.ok .k{background:var(--brand);color:#fff;border-color:var(--brand)}
.opt.no{border-color:var(--danger);background:var(--danger-soft)}
.opt.no .k{background:var(--danger);color:#fff;border-color:var(--danger)}
.opt[disabled]{cursor:default}
.fb{margin-top:12px;padding:13px 15px;border-radius:13px;font-size:13.5px;border:1px solid var(--line)}
.fb.ok{background:var(--brand-soft)}
.fb.no{background:var(--danger-soft)}
.fb b{display:block;margin-bottom:4px}

/* ---------------- 专注舱 ---------------- */
.focus-wrap{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}
.timer-card{display:flex;flex-direction:column;align-items:center;gap:18px;padding:34px 24px}
.timer-num{font-size:64px;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1}
.timer-sub{font-size:13px;color:var(--ink-3)}
.timer-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.tab-seg{display:inline-flex;background:var(--paper);border:1px solid var(--line);border-radius:11px;padding:3px;gap:2px}
.tab-seg button{border:0;background:none;padding:6px 14px;border-radius:8px;font-size:13px;font-weight:600;color:var(--ink-3);cursor:pointer}
.tab-seg button.on{background:var(--card);color:var(--ink);box-shadow:var(--shadow)}

/* ---------------- 习惯 ---------------- */
.habit{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:var(--card);transition:.15s}
.habit:hover{border-color:var(--brand-2)}
.habit.on{background:var(--brand-soft);border-color:var(--brand-2)}
.habit .h-ic{width:38px;height:38px;border-radius:11px;background:var(--paper-2);display:grid;place-items:center;font-size:18px;flex:none;border:1px solid var(--line)}
.habit.on .h-ic{background:var(--card)}
.habit .h-b{flex:1;min-width:0}
.habit .h-b b{font-size:13.5px;font-weight:600;display:block}
.habit .h-b span{font-size:11.5px;color:var(--ink-3)}
.check{
  width:28px;height:28px;border-radius:50%;border:2px solid var(--line);background:var(--card);
  display:grid;place-items:center;cursor:pointer;flex:none;font-size:14px;color:transparent;transition:.15s;
}
.check:hover{border-color:var(--brand-2)}
.habit.on .check{background:var(--brand);border-color:var(--brand);color:#fff}

/* 家庭公约 */
.pact{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:12px;background:var(--paper-2);border:1px solid var(--line);margin-bottom:8px}
.pact .p-b{flex:1;font-size:13.5px}
.pact .p-who{font-size:11px;color:var(--ink-3)}

/* ---------------- 家长看板 ---------------- */
.metric{padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:var(--card)}
.metric .m-k{font-size:12px;color:var(--ink-3);display:flex;justify-content:space-between}
.metric .m-v{font-size:20px;font-weight:800;margin:3px 0 6px}
.metric .m-v small{font-size:11.5px;color:var(--ink-3);font-weight:600}
.trend{width:100%;height:150px;display:block}
.advice{padding:12px 14px;border-radius:13px;background:var(--blue-soft);border:1px solid var(--line);font-size:13px;color:var(--ink-2);margin-top:12px}

/* ---------------- AI 对话 ---------------- */
.chat-shell{display:grid;grid-template-columns:1fr 280px;gap:18px;align-items:start}
.chat{display:flex;flex-direction:column;height:calc(100vh - 250px);min-height:440px;border:1px solid var(--line);border-radius:18px;background:var(--card);overflow:hidden}
.chat-log{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:14px}
.msg{display:flex;gap:10px;max-width:88%}
.msg .av{width:32px;height:32px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:15px;background:var(--brand-soft);border:1px solid var(--line)}
.msg .bubble{padding:11px 14px;border-radius:14px;font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word;background:var(--paper-2);border:1px solid var(--line)}
.msg.me{margin-left:auto;flex-direction:row-reverse}
.msg.me .bubble{background:var(--brand);color:#fff;border-color:var(--brand)}
.msg.me .av{background:var(--accent-soft)}
.chat-in{border-top:1px solid var(--line);padding:12px;display:flex;gap:8px;align-items:flex-end;background:var(--paper-2)}
.chat-in textarea{
  flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:10px 12px;
  font-family:inherit;font-size:14px;max-height:130px;background:var(--card);color:var(--ink);outline:none;
}
.chat-in textarea:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px var(--brand-soft)}
.msg .bubble.thinking{color:var(--ink-3);font-size:13px}
.typing i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--ink-3);margin-right:3px;animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}
.typing i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.sugg{display:flex;flex-direction:column;gap:8px}
.sugg button{text-align:left;padding:10px 12px;border-radius:11px;border:1px solid var(--line);background:var(--card);font-size:13px;cursor:pointer;color:var(--ink)}
.sugg button:hover{border-color:var(--brand-2);background:var(--brand-soft)}

/* ---------------- 卡片 / 知识库 ---------------- */
.flip{perspective:1000px;height:158px;cursor:pointer}
.flip-in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flip.on .flip-in{transform:rotateY(180deg)}
.flip-f,.flip-b{
  position:absolute;inset:0;backface-visibility:hidden;border-radius:15px;border:1px solid var(--line);
  padding:16px;display:flex;flex-direction:column;justify-content:center;gap:6px;background:var(--card);
}
.flip-b{transform:rotateY(180deg);background:var(--brand-soft)}
.flip .q{font-size:14.5px;font-weight:700}
.flip .a{font-size:13px;color:var(--ink-2)}
.flip .tag{font-size:11px;color:var(--ink-3)}

.kb-tree{border:1px solid var(--line);border-radius:14px;overflow:hidden}
.kb-item{border-bottom:1px solid var(--line)}
.kb-item:last-child{border-bottom:0}
.kb-h{display:flex;align-items:center;gap:10px;padding:12px 14px;cursor:pointer;font-size:13.5px;font-weight:600}
.kb-h:hover{background:var(--paper-2)}
.kb-h .arw{margin-left:auto;color:var(--ink-3);font-size:12px;transition:.2s}
.kb-item.open .kb-h .arw{transform:rotate(90deg)}
.kb-c{padding:0 14px 12px 44px;font-size:13px;color:var(--ink-2);display:none}
.kb-item.open .kb-c{display:block}

/* 表格 */
.table{width:100%;border-collapse:collapse;font-size:13px}
.table th,.table td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line)}
.table th{font-size:11.5px;color:var(--ink-3);font-weight:600;text-transform:none}
.table tr:last-child td{border-bottom:0}
.table td b{font-variant-numeric:tabular-nums}

/* 表单 */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:12.5px;color:var(--ink-2);font-weight:600}
.field input[type=text],.field input[type=number],.field select,.field textarea{
  padding:10px 12px;border-radius:11px;border:1px solid var(--line);background:var(--card);
  color:var(--ink);font-family:inherit;font-size:14px;outline:none;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px var(--brand-soft)}
.switch{display:flex;align-items:center;gap:10px;font-size:13.5px;cursor:pointer}
.switch input{appearance:none;width:40px;height:23px;border-radius:999px;background:var(--line);position:relative;cursor:pointer;transition:.2s;flex:none}
.switch input:checked{background:var(--brand)}
.switch input::after{content:"";position:absolute;top:3px;left:3px;width:17px;height:17px;border-radius:50%;background:#fff;transition:.2s}
.switch input:checked::after{transform:translateX(17px)}

/* 测评 */
.step-dots{display:flex;gap:6px;justify-content:center;margin-bottom:18px}
.step-dots i{width:26px;height:5px;border-radius:99px;background:var(--line)}
.step-dots i.on{background:var(--brand)}
.step-dots i.done{background:var(--brand-2);opacity:.45}

/* 弹层 */
.modal{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:20px}
.modal[hidden]{display:none}
.modal-bg{position:absolute;inset:0;background:rgba(20,28,25,.42);backdrop-filter:blur(3px)}
.modal-card{
  position:relative;background:var(--card);border-radius:20px;border:1px solid var(--line);
  padding:22px;max-width:560px;width:100%;max-height:86vh;overflow-y:auto;box-shadow:var(--shadow-lg);
  animation:pop .18s ease-out;
}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.985)}to{opacity:1;transform:none}}
.modal-h{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px}
.modal-h h3{font-size:17px}
.modal-h .x{margin-left:auto;border:0;background:none;font-size:20px;cursor:pointer;color:var(--ink-3);line-height:1}

/* toast */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);
  background:var(--ink);color:var(--paper);padding:11px 18px;border-radius:12px;
  font-size:13.5px;opacity:0;pointer-events:none;transition:.25s;z-index:99;max-width:86vw;text-align:center;
}
.toast.on{opacity:1;transform:translate(-50%,0)}
html[data-theme="dark"] .toast{background:#eaf1ec;color:#151a18}

.only-mobile{display:none}

/* ---------------- 学段切换 ---------------- */
.stage-pick{display:flex;gap:2px;background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:3px}
.stage-pick button{
  border:0;background:none;padding:5px 9px;border-radius:7px;font-size:12px;font-weight:600;
  color:var(--ink-3);cursor:pointer;white-space:nowrap;transition:.15s;
}
.stage-pick button:hover{color:var(--brand)}
.stage-pick button.on{background:var(--card);color:var(--ink);box-shadow:var(--shadow)}
.stage-bar{display:flex;gap:8px;margin-bottom:18px;overflow-x:auto;padding-bottom:2px;scrollbar-width:none;-ms-overflow-style:none}
.stage-bar::-webkit-scrollbar{display:none;height:0}
.stage-tab{
  flex:1;min-width:132px;display:flex;align-items:center;gap:8px;
  padding:11px 14px;border-radius:14px;border:1px solid var(--line);background:var(--card);
  color:var(--ink-2);font-size:13.5px;font-weight:600;cursor:pointer;transition:.16s;text-align:left;
}
.stage-tab small{display:block;font-size:11px;font-weight:400;color:var(--ink-3);margin-left:auto}
.stage-tab:hover{border-color:var(--brand-2);transform:translateY(-1px)}
.stage-tab.on{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 10px 22px -14px rgba(47,107,83,.9)}
.stage-tab.on small{color:rgba(255,255,255,.75)}

/* ---------------- 方法卡 / 痛点 ---------------- */
.tip-banner{
  padding:11px 14px;border-radius:12px;background:var(--gold-soft);border:1px solid var(--line);
  font-size:12.5px;color:#8a6a08;margin-bottom:14px;
}
html[data-theme="dark"] .tip-banner{color:var(--gold)}
.method-card{padding:0;overflow:hidden}
.mc-h{display:flex;align-items:flex-start;gap:12px;padding:15px 18px;cursor:pointer}
.mc-h:hover{background:var(--paper-2)}
.mc-main{flex:1;min-width:0}
.mc-t{font-size:14.5px;font-weight:700;display:flex;align-items:center;gap:8px;flex-wrap:wrap;line-height:1.5}
.mc-tags{margin-top:7px;display:flex;gap:6px;flex-wrap:wrap}
.mc-ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:19px;background:var(--paper-2);border:1px solid var(--line);flex:none}
.mc-s{font-size:12.5px;color:var(--ink-3);line-height:1.55;margin-top:3px}
.mc-h .arw{color:var(--ink-3);font-size:13px;transition:.2s;flex:none}
.method-card.open .mc-h .arw{transform:rotate(90deg)}
.mc-b{padding:0 18px 18px;border-top:1px solid var(--line);margin-top:0;padding-top:14px}
.mc-label{font-size:11.5px;font-weight:700;color:var(--ink-3);letter-spacing:.06em;margin-bottom:6px}
.pain-t{font-size:14.5px;font-weight:700;margin-bottom:6px}
.pain-c{font-size:12.8px;color:var(--ink-2);line-height:1.7}
.pain-c b{color:var(--ink);font-weight:600}

/* 关卡 */
@media (max-width:860px){
  .stage-pick{display:none}
  .stage-tab{min-width:116px;padding:9px 11px;font-size:12.5px}
  .stage-tab small{display:none}
  .mc-h{padding:12px 14px}
  .mc-b{padding:0 14px 14px;padding-top:12px}
}

/* ---------------- 学科地图 ---------------- */
.subj-grid{align-items:start}
.subj-card{display:flex;flex-direction:column}
.subj-h{display:flex;align-items:center;gap:12px}
.subj-ic{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;font-size:20px;background:var(--paper-2);border:1px solid var(--line);flex:none}
.subj-t{font-size:15px;font-weight:700}
.kp-list{display:flex;flex-wrap:wrap;gap:6px}
.kp{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 9px;border-radius:8px;background:var(--paper-2);border:1px solid var(--line);
  font-size:11.8px;color:var(--ink-2);line-height:1.4;
}
.kp i{width:6px;height:6px;border-radius:50%;flex:none}
.kp em{font-style:normal;color:var(--ink-3);font-size:10.5px;margin-left:2px}
.kp-btn{cursor:pointer;font-family:inherit;transition:.14s}
.kp-btn:hover{border-color:var(--brand-2);background:var(--brand-soft);transform:translateY(-1px)}
.input-row{display:flex;gap:8px;align-items:center}
.input-row input{
  flex:1;padding:10px 13px;border-radius:11px;border:1px solid var(--line);
  background:var(--paper-2);color:var(--ink);font-size:13.5px;font-family:inherit;outline:none;min-width:0;
}
.input-row input:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px var(--brand-soft)}

/* 学习路径 */
.path-line{display:flex;flex-direction:column;gap:0;margin-top:4px}
.path-step{display:flex;gap:12px;align-items:flex-start;padding:10px 0;position:relative}
.path-step:not(:last-child)::before{
  content:"";position:absolute;left:13px;top:36px;bottom:-4px;width:2px;background:var(--line);
}
.ps-dot{
  width:28px;height:28px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:700;border:1px solid var(--line);
}
.ps-d{font-size:11.5px;color:var(--ink-3);font-weight:600}
.ps-t{font-size:13.5px;margin:2px 0 2px}

/* ---------------- 学习计划 ---------------- */
.plan-item{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--line)}
.plan-item:last-child{border-bottom:0}
.plan-item.on .pi-t{color:var(--ink-3);text-decoration:line-through}
.pi-t{font-size:13.5px;font-weight:600;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.pi-m{font-size:11.5px;color:var(--ink-3);margin-top:2px}
.plan-day{border-top:1px solid var(--line);padding:12px 0}
.plan-day:first-of-type{border-top:0}
.pd-h{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.pd-h b{font-size:13.5px}

/* 提示阶梯 */
.hint-box{background:var(--gold-soft);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:12px}
.hint-line{font-size:12.8px;color:var(--ink-2);line-height:1.7;padding:3px 0}
.hint-line b{display:inline-block;margin-right:8px;color:#8a6a08;font-size:11.5px}
html[data-theme="dark"] .hint-line b{color:var(--gold)}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .hero{grid-template-columns:1fr}
  .hero-side{flex-direction:row;justify-content:flex-start;flex-wrap:wrap}
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .focus-wrap,.chat-shell{grid-template-columns:1fr}
  .chat{height:auto;min-height:420px}
}
@media (max-width:860px){
  .side{
    position:fixed;left:0;top:0;bottom:0;z-index:60;transform:translateX(-102%);
    transition:.22s;box-shadow:var(--shadow-lg);background:var(--paper);
  }
  .side.open{transform:none}
  .only-mobile{display:grid}
  .main{padding:16px 14px 90px}
  .topbar{padding:10px 14px}
  .topbar-title{font-size:14.5px}
  .foot{display:none}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .quick{grid-template-columns:repeat(2,1fr)}
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:50;
    background:color-mix(in srgb,var(--card) 92%,transparent);
    border-top:1px solid var(--line);backdrop-filter:blur(12px);
    padding:6px 4px calc(6px + env(safe-area-inset-bottom));
  }
  .tabbar a{
    flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
    font-size:10.5px;color:var(--ink-3);padding:5px 2px;border-radius:10px;text-decoration:none;
  }
  .tabbar a .ic{font-size:18px}
  .tabbar a.on{color:var(--brand);background:var(--brand-soft)}
  .hero{padding:18px}
  .hero h1{font-size:19px}
  .timer-num{font-size:52px}
  .msg{max-width:94%}
  .zone-body{grid-template-columns:1fr}
  .card{padding:16px}
  .modal-card{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}