*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
:root{
  --brand:#3b7cff;--brand-soft:#e9f0ff;--brand-deep:#2a63dd;
  --bg:#f2f4fa;--card:#fff;--text:#171f30;--muted:#8b93a7;
  --line:#e9ecf4;--ok:#12b364;--ok-soft:#e6f8ef;--warn:#ff9d18;--err:#f04438;--err-soft:#fdecea;
  --r:18px;--shadow:0 6px 22px rgba(23,35,66,.07);
  --safe-b:env(safe-area-inset-bottom,0px);
}
body{
  margin:0;background:var(--bg);color:var(--text);font-size:16px;line-height:1.55;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",system-ui,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;overscroll-behavior-y:none;
}
#screen{max-width:560px;margin:0 auto;min-height:100%;display:flex;flex-direction:column;background:var(--bg);position:relative}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
a{color:var(--brand);text-decoration:none}

/* ---------- 顶部栏（含机构 LOGO） ---------- */
.topbar{
  position:sticky;top:0;z-index:30;background:var(--card);border-bottom:1px solid var(--line);
  padding:calc(env(safe-area-inset-top,0px) + 10px) 14px 10px;
  display:flex;align-items:center;gap:10px;
}
.org-logo{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:15px;overflow:hidden;border:1px solid var(--line)
}
.org-logo img{width:100%;height:100%;object-fit:contain;background:#fff}
.org-meta{min-width:0;flex:1}
.org-name{font-size:15px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.org-sub{font-size:12px;color:var(--muted);line-height:1.3}
.icon-btn{width:36px;height:36px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--muted)}
.icon-btn:active{background:var(--bg)}

/* ---------- 内容区 ---------- */
.content{flex:1;padding:14px 14px calc(96px + var(--safe-b))}
.content.flush{padding-top:0}
.tabbar~.content{padding-bottom:calc(96px + var(--safe-b))}
.h1{font-size:24px;font-weight:800;letter-spacing:-.3px;margin:0 0 4px}
.h2{font-size:17px;font-weight:700;margin:22px 0 10px;display:flex;align-items:center;gap:8px}
.h2:first-child{margin-top:6px}
.muted{color:var(--muted)}
.small{font-size:13px}
.tiny{font-size:12px}
.center{text-align:center}
.row{display:flex;align-items:center;gap:10px}
.row.between{justify-content:space-between}
.grow{flex:1;min-width:0}
.ellipsis{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stack>*+*{margin-top:10px}
.spacer{height:8px}

/* ---------- 卡片 ---------- */
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:15px;border:1px solid rgba(233,236,244,.9)}
.card+.card{margin-top:10px}
.card.tap:active{transform:scale(.985);transition:transform .08s}
.card.flat{box-shadow:none;border:1px solid var(--line)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:48px;padding:0 18px;border-radius:14px;font-weight:700;font-size:16px;
  background:var(--brand);color:#fff;transition:transform .08s,filter .15s;width:100%
}
.btn:active{transform:scale(.97);filter:brightness(.95)}
.btn[disabled]{opacity:.45}
.btn.ghost{background:var(--brand-soft);color:var(--brand)}
.btn.line{background:transparent;color:var(--text);border:1.5px solid var(--line)}
.btn.danger{background:var(--err-soft);color:var(--err)}
.btn.ok{background:var(--ok)}
.btn.sm{height:38px;font-size:14px;padding:0 14px;border-radius:11px;width:auto}
.btn.block{width:100%}
.btn-row{display:flex;gap:10px}
.link-btn{color:var(--brand);font-weight:600;font-size:14px;padding:6px 2px}

/* ---------- 表单 ---------- */
.field{margin-bottom:13px}
.label{font-size:13px;font-weight:600;color:#5b6478;margin-bottom:6px;display:block}
.input,.textarea,.select{
  width:100%;background:var(--card);border:1.5px solid var(--line);border-radius:13px;
  padding:12px 13px;font-size:16px;outline:none;transition:border-color .15s,box-shadow .15s
}
.input:focus,.textarea:focus,.select:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.textarea{min-height:88px;resize:vertical;line-height:1.6}
.select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 18px) 21px,calc(100% - 13px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.input-group{display:flex;gap:8px}
.input-group .input{flex:1}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.err-text{font-size:13px;color:var(--err);margin-top:8px}

/* ---------- 登录页 ---------- */
.auth{padding:0 22px 30px;flex:1;display:flex;flex-direction:column;justify-content:center;min-height:100vh;max-width:560px;margin:0 auto}
.auth-logo{width:96px;height:96px;border-radius:26px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;
  background:#fff;box-shadow:0 12px 32px rgba(23,35,66,.1);overflow:hidden;font-size:38px}
.auth-logo img{width:78%;height:78%;object-fit:contain}
.auth-org{text-align:center;font-size:20px;font-weight:800}
.auth-sub{text-align:center;color:var(--muted);font-size:13px;margin-top:4px}
.role-switch{display:flex;background:#e8ebf5;border-radius:14px;padding:4px;margin:22px 0 18px}
.role-switch button{flex:1;height:42px;border-radius:11px;font-weight:700;font-size:15px;color:#6a7386}
.role-switch button.on{background:#fff;color:var(--brand);box-shadow:0 2px 8px rgba(23,35,66,.1)}
.code-btn{min-width:104px;height:48px;border-radius:13px;background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:14px}
.code-btn[disabled]{opacity:.55}

/* ---------- 列表项 ---------- */
.list-item{display:flex;align-items:center;gap:12px;padding:14px;background:var(--card);border-radius:15px;border:1px solid rgba(233,236,244,.9);box-shadow:var(--shadow)}
.list-item+.list-item{margin-top:9px}
.li-icon{width:44px;height:44px;border-radius:13px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:21px;flex:0 0 auto}
.li-title{font-weight:700;font-size:15.5px}
.li-sub{font-size:12.5px;color:var(--muted);margin-top:2px;display:flex;gap:8px;flex-wrap:wrap}
.li-right{text-align:right;flex:0 0 auto}

/* ---------- 标签 / 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:4px;font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--brand-soft);color:var(--brand)}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.warn{background:#fff3e0;color:#d97b00}
.badge.err{background:var(--err-soft);color:var(--err)}
.badge.plain{background:#eef0f6;color:#5b6478}
.dot{width:7px;height:7px;border-radius:50%;background:var(--brand);display:inline-block}
.dot.ok{background:var(--ok)}
.dot.err{background:var(--err)}

/* ---------- 底部导航 ---------- */
.tabbar{
  position:fixed;bottom:0;left:0;right:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);display:flex;padding:6px 4px calc(6px + var(--safe-b));max-width:560px;margin:0 auto
}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 0;color:var(--muted);font-size:11px;font-weight:600}
.tab .ti{font-size:21px;line-height:1}
.tab.on{color:var(--brand)}

/* ---------- 进度 ---------- */
.bar{height:8px;background:#e8ebf5;border-radius:999px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--brand);border-radius:999px;transition:width .45s cubic-bezier(.2,.8,.2,1)}
.bar.ok>i{background:var(--ok)}
.stage{height:6px;background:#e8ebf5;border-radius:999px;overflow:hidden;display:flex;gap:4px;background:transparent}
.stage>i{flex:1;height:100%;background:#e2e6f0;border-radius:999px;transition:background .3s}
.stage>i.done{background:var(--ok)}
.stage>i.now{background:var(--brand)}
.stage>i.wrong{background:var(--err)}

/* ---------- 吉祥物 ---------- */
.mascot{width:132px;height:132px;margin:0 auto;position:relative}
.mascot svg{width:100%;height:100%;display:block;overflow:visible}
.mascot .body-g{transform-origin:60px 96px;animation:bob 2.4s ease-in-out infinite}
.mascot.happy .body-g{animation:jump .55s cubic-bezier(.3,1.6,.5,1) 2}
.mascot.sad .body-g{animation:shake .42s ease-in-out 2}
.mascot.cheer .arm-l{animation:armL .5s ease-in-out infinite alternate}
.mascot.cheer .arm-r{animation:armR .5s ease-in-out infinite alternate}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@keyframes jump{0%,100%{transform:translateY(0) scale(1)}35%{transform:translateY(-22px) scale(1.05,.95)}70%{transform:translateY(0) scale(.96,1.06)}}
@keyframes shake{0%,100%{transform:translateX(0) rotate(0)}25%{transform:translateX(-7px) rotate(-3deg)}75%{transform:translateX(7px) rotate(3deg)}}
@keyframes armL{from{transform:rotate(0)}to{transform:rotate(-32deg)}}
@keyframes armR{from{transform:rotate(0)}to{transform:rotate(32deg)}}
.mascot .arm-l,.mascot .arm-r{transform-origin:0px 0px}

/* ---------- 特效层 ---------- */
#fx{position:fixed;inset:0;pointer-events:none;z-index:60;overflow:hidden}
.particle{position:absolute;width:12px;height:12px;border-radius:3px;will-change:transform,opacity}
.fly-star{position:absolute;font-size:26px;will-change:transform,opacity}
.fx-msg{
  position:fixed;left:50%;top:38%;transform:translate(-50%,-50%);z-index:61;
  font-size:30px;font-weight:900;color:#fff;padding:14px 30px;border-radius:20px;
  animation:pop .9s cubic-bezier(.2,1.4,.4,1) forwards;pointer-events:none;white-space:nowrap;
  box-shadow:0 12px 34px rgba(0,0,0,.22)
}
.fx-msg.ok{background:linear-gradient(135deg,#20c17a,#0ea15d)}
.fx-msg.bad{background:linear-gradient(135deg,#ff7a6b,#ef4136)}
@keyframes pop{0%{transform:translate(-50%,-50%) scale(.4);opacity:0}25%{transform:translate(-50%,-50%) scale(1.1);opacity:1}70%{transform:translate(-50%,-50%) scale(1);opacity:1}100%{transform:translate(-50%,-90%) scale(.9);opacity:0}}
.shake{animation:shake .42s ease-in-out}
.pulse{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.55}}

/* ---------- 题目 ---------- */
.q-stem{font-size:17px;font-weight:700;line-height:1.6;margin:2px 0 14px}
.q-stem .qno{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:8px;background:var(--brand);color:#fff;font-size:13px;margin-right:8px;vertical-align:2px}
.opt{display:flex;align-items:center;gap:12px;padding:14px;border:2px solid var(--line);border-radius:15px;background:var(--card);margin-bottom:10px;transition:border-color .15s,background .15s,transform .08s}
.opt:active{transform:scale(.985)}
.opt .key{width:30px;height:30px;border-radius:50%;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;color:#7b8496;flex:0 0 auto}
.opt .txt{flex:1;font-size:15.5px}
.opt.on{border-color:var(--brand);background:var(--brand-soft)}
.opt.on .key{background:var(--brand);border-color:var(--brand);color:#fff}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.right .key{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--err);background:var(--err-soft)}
.opt.wrong .key{background:var(--err);border-color:var(--err);color:#fff}
.fill-input{width:100%;border:2px solid var(--line);border-radius:14px;padding:14px;font-size:17px;outline:none;text-align:center;letter-spacing:2px}
.fill-input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.fill-input.right{border-color:var(--ok);background:var(--ok-soft)}
.fill-input.wrong{border-color:var(--err);background:var(--err-soft)}

/* ---------- 媒体 ---------- */
.media-box{border-radius:15px;overflow:hidden;background:#0e1424;margin-bottom:14px;position:relative}
.media-box video,.media-box img{width:100%;display:block;max-height:280px;object-fit:contain;background:#0e1424}
.media-audio{padding:14px;background:var(--card);border:1.5px solid var(--line);border-radius:15px;margin-bottom:14px}
.media-audio audio{width:100%;display:block}
.media-tag{position:absolute;left:10px;top:10px;background:rgba(0,0,0,.55);color:#fff;font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px}
.media-chip{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:4px 10px;border-radius:999px}

/* ---------- 动画题 ---------- */
.anim-stage{background:linear-gradient(160deg,#1b2a54,#2c4a8f);border-radius:16px;padding:18px 12px;margin-bottom:14px;position:relative;overflow:hidden}
.anim-stage .sky-label{color:#cfe0ff;font-size:12.5px;text-align:center;margin-bottom:6px;position:relative;z-index:2}
.anim-scene{height:120px;position:relative}
.anim-ball{position:absolute;bottom:0;width:26px;height:26px;border-radius:50%;box-shadow:inset -4px -5px 0 rgba(0,0,0,.16)}
.anim-ball.will-hop{animation:hop 1.1s cubic-bezier(.35,0,.5,1) infinite}
@keyframes hop{0%{transform:translateY(0) scaleY(.86)}12%{transform:translateY(0) scaleY(1.1)}50%{transform:translateY(-72px) scaleY(.96)}88%{transform:translateY(0) scaleY(1.1)}100%{transform:translateY(0) scaleY(.86)}}
.anim-mascot{position:absolute;right:8px;bottom:0;font-size:34px;animation:bob 1.8s ease-in-out infinite}
.anim-sign{position:absolute;left:8px;bottom:6px;background:#fff;color:#1b2a54;font-weight:800;font-size:13px;padding:5px 11px;border-radius:10px;animation:pulse 2s ease-in-out infinite}

/* ---------- 弹窗 / 提示 ---------- */
.sheet-mask{position:fixed;inset:0;background:rgba(14,20,36,.45);z-index:70;display:flex;align-items:flex-end;justify-content:center;animation:fade .18s}
.sheet{background:#fff;width:100%;max-width:560px;border-radius:24px 24px 0 0;padding:18px 18px calc(18px + var(--safe-b));max-height:88vh;overflow:auto;animation:up .26s cubic-bezier(.2,.9,.2,1)}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes up{from{transform:translateY(30px)}to{transform:translateY(0)}}
.sheet h3{margin:2px 0 14px;font-size:18px}
.sheet-item{display:flex;align-items:center;gap:12px;padding:14px 4px;border-bottom:1px solid var(--line);font-size:15.5px;width:100%;text-align:left}
.sheet-item:last-child{border-bottom:0}
.toast{
  position:fixed;left:50%;bottom:calc(90px + var(--safe-b));transform:translateX(-50%) translateY(16px);
  background:rgba(23,31,48,.94);color:#fff;padding:11px 18px;border-radius:14px;font-size:14px;font-weight:600;
  max-width:88%;text-align:center;opacity:0;pointer-events:none;transition:opacity .22s,transform .22s;z-index:90
}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 空状态 ---------- */
.empty{text-align:center;padding:52px 20px;color:var(--muted)}
.empty .e-icon{font-size:52px;opacity:.5}
.empty .e-title{font-weight:700;color:#5b6478;margin-top:10px}

/* ---------- 结果页 ---------- */
.result-hero{background:linear-gradient(160deg,var(--brand),var(--brand-deep));border-radius:22px;padding:24px 18px;color:#fff;text-align:center;position:relative;overflow:hidden}
.result-hero.good{background:linear-gradient(160deg,#22c37c,#0b9955)}
.result-hero.mid{background:linear-gradient(160deg,#ffa62b,#f07c00)}
.score-big{font-size:52px;font-weight:900;line-height:1.1;letter-spacing:-1px}
.stars{font-size:26px;letter-spacing:2px;margin-top:6px}

/* ---------- 统计 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.stat{background:var(--card);border-radius:15px;padding:13px 8px;text-align:center;border:1px solid rgba(233,236,244,.9);box-shadow:var(--shadow)}
.stat .n{font-size:22px;font-weight:800;line-height:1.2}
.stat .l{font-size:11.5px;color:var(--muted);margin-top:2px}
.stu-row{display:flex;align-items:center;gap:11px;padding:12px 4px;border-bottom:1px solid var(--line)}
.stu-row:last-child{border-bottom:0}
.avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:15px;flex:0 0 auto}

/* ---------- 拖拽排序项 ---------- */
.q-card{border:1.5px solid var(--line);border-radius:15px;padding:13px;background:var(--card);margin-bottom:10px}
.q-card .qc-head{display:flex;align-items:center;gap:8px;margin-bottom:9px}
.q-type{font-size:11.5px;font-weight:800;color:#fff;background:var(--brand);padding:3px 9px;border-radius:999px}
.mini-input{width:100%;border:1.5px solid var(--line);border-radius:11px;padding:10px 12px;font-size:15px;outline:none}
.mini-input:focus{border-color:var(--brand)}
.opt-row{display:flex;align-items:center;gap:8px;margin-bottom:7px}
.opt-row .pick{width:30px;height:30px;border-radius:50%;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#8b93a7;flex:0 0 auto}
.opt-row .pick.on{background:var(--ok);border-color:var(--ok);color:#fff}
.opt-row .del{width:30px;height:30px;border-radius:9px;color:var(--muted);font-size:16px;flex:0 0 auto}