:root{--ink:#231912;--paper:#f8f0dc;--clay:#b84f36;--jade:#0f6659;--line:#d7c5a2;--white:#fffdf7}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:radial-gradient(circle at 15% 5%,#fff8e8 0,transparent 28%),var(--paper);font:17px/1.7 system-ui,"Microsoft YaHei",sans-serif}a{color:inherit}.site-header{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem max(5vw,1rem);background:rgba(248,240,220,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.brand{font-weight:900;text-decoration:none;letter-spacing:.08em}.site-header nav{display:flex;gap:.85rem;overflow:auto;white-space:nowrap}.site-header nav a{font-size:.85rem;text-decoration:none}.hero,.page,.cards{width:min(100% - 2rem,1040px);margin:auto}.hero{min-height:68vh;padding:5rem 0 3rem;text-align:center}.eyebrow{color:var(--clay);font-size:.78rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.oracle-mark{display:grid;place-items:center;width:7rem;height:8rem;margin:1.5rem auto;border:2px solid var(--ink);border-radius:50% 44% 48% 38%;background:#d9b47d;color:var(--ink);font:700 3.8rem serif;transform:rotate(-3deg);box-shadow:10px 12px 0 rgba(35,25,18,.1)}h1{max-width:760px;margin:.4rem auto 1rem;font:900 clamp(2.2rem,8vw,5rem)/1.05 serif;letter-spacing:-.03em}.hero>p:not(.eyebrow){max-width:620px;margin:0 auto 2rem}.button{display:inline-block;border:0;border-radius:999px;padding:.8rem 1.35rem;background:var(--clay);color:white;font-weight:800;text-decoration:none;cursor:pointer;box-shadow:0 5px 0 #7f3020}.button:active{transform:translateY(3px);box-shadow:0 2px 0 #7f3020}.cards{display:grid;gap:1rem;padding:0 0 4rem}.card,.acts article,.source-list section,.exhibit,form{padding:1.35rem;border:1px solid var(--line);border-radius:20px;background:var(--white);box-shadow:0 12px 30px rgba(69,45,25,.07)}.card{text-decoration:none}.card span,.acts b{color:var(--clay);font-size:.8rem;letter-spacing:.08em}.card h2,.acts h2{margin:.35rem 0}.page{padding:3.5rem 0 5rem}.page h1{text-align:left;margin-left:0;font-size:clamp(2.25rem,7vw,4.5rem)}.acts,.source-list{display:grid;gap:1rem;margin:2rem 0}.exhibit{display:grid;gap:1.5rem;margin:2rem 0}.bone{min-height:260px;display:flex;align-items:center;justify-content:center;gap:.35rem;border-radius:45% 55% 48% 42%;background:#dcb77d;border:2px solid #7d5533;box-shadow:inset 10px -10px 0 rgba(102,61,33,.08);font:700 3rem serif}.bone span:nth-child(2){transform:translateY(-2rem)}.status{display:inline-block;padding:.35rem .7rem;border-radius:99px;background:#fff0c8;color:#744b00;font-size:.82rem;font-weight:700}.note{padding-left:.8rem;border-left:3px solid var(--clay);font-size:.9rem}.choice{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0}.choice button,.text-button{border:1px solid var(--jade);border-radius:99px;padding:.65rem .9rem;background:transparent;color:var(--jade);font:inherit;font-weight:700;cursor:pointer}.choice button.selected{background:var(--jade);color:white}form{max-width:700px}label{display:block;margin-bottom:1rem;font-weight:800}small{display:block;color:#715e4d;font-weight:400}input,textarea{width:100%;margin-top:.35rem;padding:.8rem;border:1px solid var(--line);border-radius:12px;background:white;color:var(--ink);font:inherit}textarea{min-height:120px;resize:vertical}#save-status,#observe-result{min-height:1.7em;color:var(--jade);font-weight:700}footer{padding:1.5rem;text-align:center;border-top:1px solid var(--line);font-size:.82rem}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #f2a900;outline-offset:3px}@media(min-width:700px){.cards{grid-template-columns:repeat(3,1fr)}.acts,.source-list{grid-template-columns:repeat(2,1fr)}.exhibit{grid-template-columns:minmax(280px,.8fr) 1.2fr}.site-header nav a{font-size:.95rem}}@media(max-width:620px){.site-header{align-items:flex-start;flex-direction:column}.site-header nav{width:100%;padding-bottom:.2rem}.hero{padding-top:3rem}.page{padding-top:2rem}}

/* V0.1-alpha 儿童体验微优化 */
body {
  background:
    radial-gradient(circle at 8% 7%, rgba(219, 175, 106, .22) 0 3px, transparent 4px),
    radial-gradient(circle at 92% 18%, rgba(15, 102, 89, .11) 0 4px, transparent 5px),
    radial-gradient(circle at 15% 5%, #fff8e8 0, transparent 28%),
    var(--paper);
  background-size: 120px 120px, 180px 180px, auto, auto;
}

.site-header nav a[aria-current="page"] {
  color: var(--clay);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 3px;
  text-underline-offset: .35rem;
}

.home-page .hero {
  min-height: 76vh;
  padding-top: 3.2rem;
}

.oracle-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  margin: 1.2rem auto 1.7rem;
}

.oracle-stage .oracle-mark {
  margin: 0;
}

.oracle-stage > i {
  width: .55rem;
  height: .55rem;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 .45rem rgba(15, 102, 89, .1);
}

.oracle-stage > i:last-child {
  width: .35rem;
  height: .35rem;
  background: var(--clay);
  box-shadow: 0 0 0 .35rem rgba(184, 79, 54, .1);
}

.hero h1 {
  max-width: 850px;
}

.hero-clues,
.source-keys {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .55rem;
  margin: -1rem auto 1.8rem;
}

.hero-clues span,
.source-keys span {
  padding: .35rem .75rem;
  border: 1px dashed var(--jade);
  border-radius: 999px;
  background: rgba(255, 253, 247, .72);
  color: var(--jade);
  font-size: .82rem;
  font-weight: 800;
}

.hero-clues span + span::before {
  content: "→";
  margin-right: .55rem;
  color: var(--clay);
}

.button-large {
  padding: .9rem 1.55rem;
  font-size: 1.05rem;
}

.card {
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  right: -1.5rem;
  bottom: -1.5rem;
  width: 5rem;
  height: 5rem;
  border: 1px dashed var(--line);
  border-radius: 50%;
}

.card b {
  color: var(--jade);
  font-size: .88rem;
}

.story-lead {
  max-width: 720px;
  margin: 0 0 1.6rem;
  color: #5e4b3c;
  font-size: 1.05rem;
}

.acts article {
  position: relative;
  padding-top: 3.2rem;
}

.scene-mark {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50% 45% 52% 42%;
  background: #e0bc82;
  color: var(--ink);
  font: 900 1.1rem serif;
  transform: rotate(5deg);
}

.question-toggle {
  width: 100%;
  margin-top: .8rem;
  padding: .75rem .9rem;
  border: 1px solid var(--jade);
  border-radius: 12px;
  background: #eef7f2;
  color: var(--jade);
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.question-toggle::after {
  content: "+";
  float: right;
  font-size: 1.25rem;
  line-height: 1;
}

.question-toggle[aria-expanded="true"]::after {
  content: "−";
}

.question-answer {
  margin: .65rem 0 0;
  padding: .75rem .9rem;
  border-left: 4px solid var(--clay);
  background: #fff9ec;
}

.inquiry {
  margin: 2rem 0;
}

.inquiry-heading {
  padding: 1.35rem;
  border-radius: 20px 20px 0 0;
  background: var(--ink);
  color: var(--white);
}

.inquiry-heading .eyebrow {
  margin: 0;
  color: #f3b99f;
}

.inquiry-heading h2 {
  margin: .25rem 0;
  font: 900 clamp(1.6rem, 5vw, 2.5rem)/1.15 serif;
}

.progress-text {
  margin: .4rem 0 0;
  color: #f5dfb6;
}

.inquiry-steps {
  display: grid;
  gap: .8rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 20px 20px;
  background: rgba(255, 253, 247, .78);
  list-style: none;
}

.inquiry-steps > li {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: .8rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--white);
}

.inquiry-steps > li > span {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border: 2px solid var(--line);
  border-radius: 50%;
  color: #786550;
  font-weight: 900;
}

.inquiry-steps > li.complete {
  border-color: rgba(15, 102, 89, .55);
  background: #f3faf6;
}

.inquiry-steps > li.complete > span {
  border-color: var(--jade);
  background: var(--jade);
  color: white;
}

.inquiry-steps h3 {
  margin: 0 0 .25rem;
  font-size: 1.05rem;
}

.inquiry-steps p {
  margin: 0;
  color: #6b5846;
}

.mini-field {
  margin: .5rem 0 0;
  color: #6b5846;
  font-weight: 400;
}

.discovery-card {
  position: relative;
  overflow: hidden;
  border-width: 2px;
  border-color: #caa778;
}

.discovery-card::before {
  content: "";
  position: absolute;
  inset: .65rem;
  border: 1px dashed rgba(184, 79, 54, .2);
  border-radius: 14px;
  pointer-events: none;
}

.discovery-card > * {
  position: relative;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: -.2rem 0 1.4rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--line);
}

.card-top span {
  color: var(--clay);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .08em;
}

.card-top h2 {
  margin: .15rem 0 0;
}

.discovery-stamp,
.source-icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 3.6rem;
  height: 3.6rem;
  border: 2px solid var(--clay);
  border-radius: 50% 44% 48% 43%;
  color: var(--clay);
  font: 900 1rem serif;
  transform: rotate(-8deg);
}

.field-step {
  display: inline-block;
  margin-bottom: .15rem;
  color: var(--ink);
  font-size: 1.08rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .7rem;
}

.source-keys {
  justify-content: flex-start;
  margin: 0 0 1.6rem;
}

.source-list section {
  position: relative;
  padding-top: 1.6rem;
}

.source-icon {
  width: 2.7rem;
  height: 2.7rem;
  margin-bottom: .7rem;
  font-size: .9rem;
}

@media (max-width: 620px) {
  .home-page .hero {
    min-height: auto;
    padding-top: 2.2rem;
  }

  .hero h1 {
    font-size: clamp(2.35rem, 11vw, 3.25rem);
  }

  .hero-clues span + span::before {
    content: "";
    margin: 0;
  }

  .inquiry-steps {
    padding: .7rem;
  }

  .inquiry-steps > li {
    grid-template-columns: 2.2rem 1fr;
    padding: .85rem;
  }

  .inquiry-steps .choice button {
    width: 100%;
    text-align: left;
  }

  .card-top {
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}