:root{
  --blue:#1457C8;
  --deep:#0A43A2;
  --mid:#78A3ED;
  --pale:#EDF4FF;
  --paper:#FFFFFF;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{margin:0;padding:0}
body{background:#EEF3F8;color:var(--deep);font-family:"Noto Serif SC","Songti SC","STSong","SimSun",serif}
button,input{font:inherit}

/* HOME */
.home-body{display:flex;justify-content:center;min-height:100dvh}
.home-canvas{
  position:relative;
  width:min(100vw,430px);
  aspect-ratio:941/1672;
  background:#fff;
  overflow:hidden;
}
.home-visual{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:fill;display:block;
  image-rendering:auto;
  user-select:none;-webkit-user-drag:none;
}
.hotspot{
  position:absolute;z-index:5;border:0;background:transparent;padding:0;margin:0;
  -webkit-tap-highlight-color:transparent;cursor:pointer
}
.home-start{left:19.1%;top:65.55%;width:61.8%;height:6.35%}
.home-invite{left:19.1%;top:72.45%;width:61.8%;height:5.75%}
.home-find{left:68.5%;top:81.2%;width:25.5%;height:11.3%}

.nickname-dialog{width:min(calc(100vw - 36px),360px);padding:0;border:1px solid rgba(20,87,200,.45);border-radius:18px;color:var(--deep);box-shadow:0 26px 80px rgba(10,40,90,.18)}
.nickname-dialog::backdrop{background:rgba(5,20,50,.28);backdrop-filter:blur(2px)}
.nickname-card{padding:26px 24px;background:#fff}
.dialog-brand{text-align:center;font-size:22px;letter-spacing:.15em;color:var(--blue)}
.dialog-brand span{display:block;margin-top:5px;font-family:Georgia,serif;font-size:8px;letter-spacing:.34em}
.nickname-card h2{text-align:center;margin:24px 0 7px;font-size:25px;font-weight:500}
.nickname-card p{text-align:center;margin:0 0 20px;font-size:13px;color:#6688C8}
.nickname-card label{display:block;font-size:12px;font-weight:700}
.nickname-card input{width:100%;height:48px;margin-top:7px;padding:0 14px;border:1px solid #83A9EF;border-radius:12px;outline:0;font:inherit}
.dialog-actions{display:grid;grid-template-columns:1fr 1.45fr;gap:10px;margin-top:20px}
.dialog-actions button{height:46px;border-radius:23px}
.dialog-actions .ghost{background:#fff;border:1px solid #83A9EF;color:var(--deep)}
.dialog-actions .primary{background:var(--blue);border:0;color:#fff}

/* QUIZ */
.quiz-body{min-height:100dvh;display:flex;justify-content:center;padding:8px}
.quiz-page{
  position:relative;
  width:min(100%,390px);
  min-height:844px;
  background:#fff;
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 8px 28px rgba(15,53,110,.06);
  padding:24px 28px 28px;
}
.frame{position:absolute;pointer-events:none}
.outer-frame{inset:10px;border:1.4px solid var(--blue)}
.inner-frame{inset:14px;border:1px solid rgba(120,163,237,.8)}
.quiz-wave{position:absolute;left:-48px;width:calc(100% + 96px);height:170px;opacity:.45;pointer-events:none}
.top-wave{top:130px;transform:scaleY(-1)}
.bottom-wave{bottom:4px}

.quiz-header{
  position:relative;z-index:2;
  display:grid;grid-template-columns:40px 1fr 40px;align-items:start
}
.back-btn{border:0;background:none;color:var(--blue);font-size:34px;line-height:1;text-align:left;padding:0}
.quiz-brand{text-align:center}
.brand-cn{font-size:25px;letter-spacing:.14em}
.brand-en{font-family:Georgia,serif;font-size:7px;letter-spacing:.32em;margin-top:4px}
.profile-dot{width:28px;height:28px;border:1.2px solid var(--blue);border-radius:50%;margin-left:auto;position:relative}
.profile-dot:before{content:"";position:absolute;width:8px;height:8px;border:1.2px solid var(--blue);border-radius:50%;top:5px;left:8px}
.profile-dot:after{content:"";position:absolute;width:14px;height:7px;border:1.2px solid var(--blue);border-radius:9px 9px 0 0;border-bottom:0;bottom:4px;left:5px}

.mini-brand-row{
  position:relative;z-index:2;
  display:grid;grid-template-columns:70px 1fr 70px;align-items:center;gap:10px;
  margin:18px 4px 28px;
  font-family:Georgia,serif;font-size:7px;line-height:1.35;letter-spacing:.18em;font-weight:700
}
.mini-brand-row .right{text-align:right}
.mini-brand-row .rule{height:1px;background:var(--blue);position:relative}
.mini-brand-row .rule span{position:absolute;width:6px;height:6px;background:var(--blue);left:50%;top:50%;transform:translate(-50%,-50%) rotate(45deg)}

.quiz-progress{
  position:relative;z-index:2;
  display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;
  margin:0 4px 34px
}
.count{font-family:Georgia,serif;font-size:20px;white-space:nowrap}
.progress-track{height:6px;background:#DFE9FB;border-radius:999px;overflow:hidden}
.progress-track span{display:block;height:100%;width:4.17%;background:var(--blue);border-radius:999px}
.progress-copy{font-size:8px;line-height:1.4;text-align:right;color:#4F78C8}

.question-block{position:relative;z-index:2}
.question-meta{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;font-family:Georgia,serif;font-size:8px;letter-spacing:.28em}
.question-meta i{height:1px;background:rgba(20,87,200,.48)}
.question-meta b{font-weight:400;letter-spacing:0}
.question-block h1{
  margin:24px 10px 14px;
  text-align:center;font-size:28px;font-weight:500;line-height:1.45;color:var(--deep)
}
.question-hint{text-align:center;font-size:11px;color:#7090CE;margin-bottom:18px}

.options{position:relative;z-index:2;display:grid;gap:10px}
.option{
  min-height:68px;display:grid;grid-template-columns:42px 1fr;align-items:center;gap:12px;
  padding:10px 14px;border:1px solid #80A8EE;border-radius:18px;background:rgba(255,255,255,.97);
  color:var(--deep);text-align:left
}
.letter{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  background:var(--pale);font-family:Georgia,serif;font-size:19px
}
.text{font-size:13px;line-height:1.48}
.option.selected{background:#EFF5FF;border-color:var(--blue)}
.option.selected .letter{background:var(--blue);color:#fff}

.answer-hint{position:relative;z-index:2;text-align:center;margin:24px 0 18px;font-size:10px;color:#6689CD}
.public-create-confirm-button{position:relative;z-index:2;display:block;width:78%;margin:0 auto 10px}
.boot-startup-notice{position:relative;z-index:3;width:78%;margin:10px auto 0;color:#8b3d4f;font-size:11px;line-height:1.5;text-align:center}
.boot-startup-reload{margin-left:8px;padding:0;border:0;color:var(--blue);background:transparent;text-decoration:underline;cursor:pointer}
.quiz-actions{position:relative;z-index:2;width:78%;margin:0 auto}
.primary-btn,.secondary-btn{width:100%;height:50px;border-radius:25px}
.primary-btn{border:0;background:linear-gradient(180deg,#2A68DD,#1457C8);color:#fff;font-size:18px;box-shadow:0 8px 18px rgba(20,87,200,.12)}
.secondary-btn{margin-top:10px;background:#fff;border:1px solid var(--blue);color:var(--deep);font-size:14px}
footer{position:relative;z-index:2;text-align:center;margin-top:34px;font-size:10px;letter-spacing:.08em;color:#6689CD}

@media (max-width:360px){
  .quiz-page{padding-left:22px;padding-right:22px}
  .question-block h1{font-size:25px}
  .text{font-size:12.5px}
}