:root {
  --red: #8a1a1a;
  --red-deep: #6e1414;
  --gold: #c8a24a;
  --gold-soft: #e7d49b;
  --ink: #2b2320;
  --paper: #f6efe2;
  --paper-2: #efe5d2;
  --card: #fffaf0;
  --muted: #8a7d68;
  --line: #e3d6bd;
  --shadow: 0 10px 30px rgba(60, 30, 10, 0.16);
  --green: #3f7d4e;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  background-image: radial-gradient(circle at 12% 18%, rgba(200,162,74,0.10), transparent 40%),
                    radial-gradient(circle at 88% 82%, rgba(138,26,26,0.07), transparent 45%);
  min-height: 100vh;
  line-height: 1.65;
}

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 12px max(26px, calc((100vw - 1080px) / 2));
  background: linear-gradient(120deg, var(--red), var(--red-deep));
  color: #fdf6e6;
  box-shadow: 0 4px 18px rgba(60,20,20,0.28);
}
.brand { display: flex; align-items: center; gap: 12px; flex: 1; }
.topbar-toggle {
  display: none;
  background: rgba(255,255,255,0.15); border: 1px solid rgba(243,230,194,0.4);
  color: #fdf6e6; width: 36px; height: 36px; border-radius: 8px;
  cursor: pointer; font-size: 16px; margin-left: auto;
  align-items: center; justify-content: center;
}
.topbar.collapsed .top-actions { display: none; }
.topbar.collapsed .tagline { display: none; }
.seal {
  width: 46px; height: 46px; border-radius: 10px;
  background: var(--gold); color: var(--red-deep);
  display: grid; place-items: center;
  font-size: 26px; font-weight: 800;
  border: 2px solid #f3e6c2; box-shadow: inset 0 0 0 2px rgba(110,20,20,0.25);
}
.brand h1 { font-size: 20px; letter-spacing: 1px; }
.tagline { font-size: 12px; opacity: 0.82; }
.llm-status { font-size: 10px; margin-left: 6px; color: #c8a24a; }
.llm-status.on { color: #3cb371; }
.llm-status.off { color: #c0c0c0; }
.tts-toggle {
  background: transparent; border: none; color: #c0c0c0; font-size: 14px;
  cursor: pointer; padding: 2px 4px; margin-left: 4px; vertical-align: middle;
}
.tts-toggle.on { color: #3cb371; }
.top-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.grade-pick { display: flex; gap: 4px; background: rgba(255,255,255,0.12); padding: 4px; border-radius: 999px; }
.grade-pick button {
  border: none; background: transparent; color: #f4e8cf;
  padding: 5px 12px; border-radius: 999px; cursor: pointer; font-size: 13px;
  font-family: inherit; transition: .15s;
}
.grade-pick button.active { background: var(--gold); color: var(--red-deep); font-weight: 700; }

.chip-btn {
  border: 1px solid rgba(243,230,194,0.5); background: rgba(255,255,255,0.08);
  color: #fdf6e6; padding: 8px 14px; border-radius: 999px; cursor: pointer;
  font-size: 13px; font-family: inherit; display: inline-flex; align-items: center; gap: 7px;
  transition: .15s;
}
.chip-btn:hover { background: rgba(255,255,255,0.18); }
.chip-btn.active { background: var(--gold); color: var(--red-deep); font-weight: 700; border-color: var(--gold); }
.badge-num { background: var(--gold); color: var(--red-deep); font-weight: 700; border-radius: 999px; padding: 1px 8px; font-size: 12px; }

.back-to-top {
  position: fixed; right: 18px; bottom: 24px; z-index: 50;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--red); color: #fff; border: 2px solid var(--gold);
  font-size: 20px; cursor: pointer; display: none;
  align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(80,30,10,0.35); transition: .2s;
}
.back-to-top.show { display: flex; }
.back-to-top:hover { filter: brightness(1.1); transform: translateY(-2px); }

/* ---------- Main ---------- */
main { max-width: 1080px; margin: 0 auto; padding: 26px 22px 60px; }
.sec-title { font-size: 20px; margin-bottom: 6px; color: var(--red-deep); }
.sec-sub { color: var(--muted); font-size: 14px; margin-bottom: 16px; }

.hero { text-align: center; padding: 22px 10px 30px; }
.kicker {
  display: inline-block; background: var(--gold-soft); color: #6b551f;
  border: 1px solid var(--gold); border-radius: 999px; padding: 5px 14px; font-size: 13px; margin-bottom: 14px;
}
.hero h2 { font-size: 30px; color: var(--red-deep); letter-spacing: 1px; margin-bottom: 10px; }
.hero p { max-width: 720px; margin: 0 auto 20px; color: #5b5145; }
.hero-controls { display: flex; gap: 12px; justify-content: center; align-items: center; flex-wrap: wrap; }

.primary-btn {
  background: linear-gradient(120deg, var(--red), var(--red-deep)); color: #fdf2dc;
  border: 1px solid var(--gold); padding: 12px 26px; border-radius: 999px;
  font-size: 16px; font-weight: 700; cursor: pointer; font-family: inherit;
  box-shadow: var(--shadow); transition: .15s;
}
.primary-btn:hover { transform: translateY(-1px); }
.ghost-btn {
  background: #fff; color: var(--red-deep); border: 1px solid var(--gold);
  padding: 12px 22px; border-radius: 999px; font-size: 15px; cursor: pointer; font-family: inherit; transition: .15s;
}
.ghost-btn:disabled { opacity: .45; cursor: not-allowed; }
.tour-status { font-size: 13px; color: var(--muted); }

/* ---------- Map ---------- */
.map-section { margin-top: 18px; }
.map-wrap { display: flex; justify-content: center; }
.map {
  position: relative; width: 100%; max-width: 520px; aspect-ratio: 3 / 4;
  background: linear-gradient(180deg, rgba(40,24,12,0.42), rgba(40,24,12,0.30) 45%, rgba(40,24,12,0.5));
  border: 8px solid var(--red); border-radius: 14px;
  box-shadow: var(--shadow), inset 0 0 0 3px var(--gold);
  overflow: hidden;
}
.map::before {
  content: "";
  position: absolute; inset: 0;
  background: url("assets/gugong.jpg") center 30%/cover no-repeat;
  z-index: 0;
}
.axis-line {
  position: absolute; left: 50%; top: 4%; bottom: 4%; width: 0;
  border-left: 2px dashed rgba(255,235,190,0.6); transform: translateX(-50%);
  z-index: 1;
}
.compass { position: absolute; top: 10px; right: 14px; font-size: 13px; color: #fff; font-weight: 700; text-shadow: 0 1px 3px rgba(0,0,0,0.6); z-index: 1; }
.moat-label { position: absolute; bottom: 10px; left: 14px; font-size: 12px; color: #ffe9c2; letter-spacing: 2px; text-shadow: 0 1px 3px rgba(0,0,0,0.6); z-index: 1; }

.hotspot {
  position: absolute; transform: translate(-50%, -50%);
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  background: none; border: none; cursor: pointer; font-family: inherit; color: var(--ink);
  transition: .15s;
  z-index: 1;
}
.hotspot:hover { transform: translate(-50%, -50%) scale(1.08); }
.hotspot .pin {
  position: relative; width: 50px; height: 50px; border-radius: 50%;
  display: grid; place-items: center; font-size: 22px; overflow: hidden;
  background: #fff; border: 2px solid #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.35);
}
.hotspot .pin img { width: 100%; height: 100%; object-fit: cover; }
.hotspot .pin-ic {
  position: absolute; right: -2px; bottom: -2px; font-size: 13px;
  background: rgba(255,255,255,0.92); border-radius: 50%; width: 20px; height: 20px;
  display: grid; place-items: center; box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.hotspot:not(.visited) .pin img { filter: grayscale(0.75) brightness(0.78); }
.hotspot.axis .pin { border-color: var(--gold); }
.hotspot.visited .pin { border-color: var(--gold); box-shadow: 0 0 0 4px rgba(200,162,74,0.6), 0 4px 10px rgba(0,0,0,0.35); }
.hotspot .pin-label {
  font-size: 12px; font-weight: 700; background: rgba(255,255,255,0.88);
  padding: 1px 7px; border-radius: 6px; white-space: nowrap; border: 1px solid var(--line);
}
.hotspot.visited .pin-label { background: var(--red); color: #fff; border-color: var(--red); }
.hotspot .check { position: absolute; top: -4px; right: 2px; font-size: 13px; }

.avatar {
  position: absolute; transform: translate(-50%, -120%); z-index: 6;
  display: flex; flex-direction: column; align-items: center; font-size: 26px;
  filter: drop-shadow(0 4px 4px rgba(0,0,0,.3)); transition: top .8s ease, left .8s ease;
  pointer-events: none;
}
.avatar span { font-size: 11px; background: var(--red); color: #fff; padding: 1px 6px; border-radius: 6px; margin-top: -4px; }

.map-legend { display: flex; gap: 18px; justify-content: center; margin-top: 14px; font-size: 13px; color: var(--muted); }
.map-legend i.dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 2px solid var(--muted); vertical-align: middle; margin-right: 4px; }
.map-legend i.dot.lit { background: var(--gold); border-color: var(--red); }
.map-legend i.dot.axis { background: #fff; border-color: var(--gold); }

/* ---------- Tasks ---------- */
.task-section { margin-top: 38px; }
.task-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 16px; }
.task-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px;
  box-shadow: 0 4px 14px rgba(80,50,20,0.07); position: relative; overflow: hidden;
}
.task-card.done { border-color: var(--green); }
.task-card .t-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.task-card .t-icon { font-size: 24px; }
.task-card h4 { font-size: 16px; color: var(--red-deep); }
.task-card .t-points { margin-left: auto; font-size: 12px; background: var(--gold-soft); color: #6b551f; border: 1px solid var(--gold); border-radius: 999px; padding: 1px 9px; }
.task-card p { font-size: 13px; color: #5b5145; margin-bottom: 12px; }
.task-prog { display: flex; align-items: center; gap: 10px; }
.bar { flex: 1; height: 9px; background: var(--paper-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--line); }
.fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--gold), var(--red)); transition: width .5s; }
.task-prog .p-text { font-size: 12px; color: var(--muted); min-width: 34px; text-align: right; }
.task-done-flag { position: absolute; top: 10px; right: -30px; transform: rotate(40deg); background: var(--green); color: #fff; font-size: 11px; padding: 2px 34px; }
.task-toggle {
  margin-top: 10px; font-size: 12px; color: var(--red-deep); background: var(--gold-soft);
  border: 1px solid var(--gold); border-radius: 999px; padding: 4px 12px; cursor: pointer;
  font-family: inherit; transition: .15s;
}
.task-toggle:hover { background: var(--gold); color: #fff; }
.task-steps {
  margin-top: 10px; padding: 10px 12px; background: var(--paper-2); border-radius: 10px;
  border: 1px solid var(--line); animation: stepIn .25s ease;
}
@keyframes stepIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
.task-step {
  display: flex; align-items: flex-start; gap: 8px; font-size: 13px; color: #3f372e;
  padding: 5px 0; border-bottom: 1px dashed var(--line);
}
.task-step:last-child { border-bottom: none; }
.task-step.done { color: var(--muted); }
.step-check { font-size: 14px; flex-shrink: 0; margin-top: 1px; }
.step-text { line-height: 1.5; }

/* ---------- Overlay / Panels ---------- */
.overlay { position: fixed; inset: 0; z-index: 90; background: rgba(40,20,10,0.5); display: flex; align-items: center; justify-content: center; padding: 18px; backdrop-filter: blur(2px); }
.overlay[hidden] { display: none; }
.panel { width: 100%; max-width: 640px; max-height: 88vh; background: var(--paper); border-radius: 16px; box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; animation: pop .2s ease; }
@keyframes pop { from { transform: translateY(14px) scale(.98); opacity: 0; } to { transform: none; opacity: 1; } }
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; background: linear-gradient(120deg, var(--red), var(--red-deep)); color: #fdf6e6; }
.panel-head.red { background: linear-gradient(120deg, var(--red), var(--red-deep)); }
.loc-title { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.loc-icon { font-size: 26px; }
.loc-title h3 { font-size: 18px; }
.loc-title small { opacity: 0.8; font-size: 12px; }
.panel-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.icon-btn { background: rgba(255,255,255,0.16); border: none; color: #fff; width: 32px; height: 32px; border-radius: 50%; cursor: pointer; font-size: 15px; }

.grade-bar { display: flex; align-items: center; gap: 12px; padding: 10px 18px; background: var(--paper-2); border-bottom: 1px solid var(--line); }
.grade-label { font-size: 13px; color: var(--muted); }
.grade-switch { display: flex; gap: 8px; flex-wrap: wrap; }
.grade-switch button {
  border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 6px 12px; cursor: pointer;
  font-family: inherit; font-size: 13px; display: flex; align-items: center; gap: 6px; transition: .15s;
}
.grade-switch button small { color: var(--muted); font-size: 11px; }
.grade-switch button.active { background: var(--red); color: #fff; border-color: var(--red); }
.grade-switch button.active small { color: var(--gold-soft); }

.chat-body { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 12px; }

.bubble { display: flex; gap: 10px; max-width: 92%; }
.bubble .face { font-size: 22px; flex-shrink: 0; }
.bubble .content { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; box-shadow: 0 2px 6px rgba(80,50,20,0.06); }
.bubble .content h5 { color: var(--red-deep); font-size: 15px; margin-bottom: 5px; }
.bubble .content p { font-size: 14.5px; color: #3f372e; }
.bubble.user { align-self: flex-end; flex-direction: row-reverse; }
.bubble.user .content { background: var(--red); color: #fdf2dc; border-color: var(--red); }
.bubble.user .content p { color: #fdf2dc; }
.bubble.sys { align-self: center; max-width: 100%; }
.bubble.sys .content { background: var(--gold-soft); border-color: var(--gold); color: #6b551f; font-size: 13px; padding: 6px 12px; }

.collect-tag { margin-top: 8px; display: inline-flex; align-items: center; gap: 5px; font-size: 12px; color: var(--green); background: #eaf3ec; border: 1px solid #cfe6d5; border-radius: 999px; padding: 2px 10px; }

/* Socratic quiz */
.quiz { margin-top: 4px; }
.quiz .q { font-weight: 700; color: var(--red-deep); margin-bottom: 8px; font-size: 14.5px; }
.quiz .opt {
  display: block; width: 100%; text-align: left; margin: 6px 0; padding: 10px 12px;
  border: 1px solid var(--line); background: #fff; border-radius: 10px; cursor: pointer;
  font-family: inherit; font-size: 14px; transition: .15s;
}
.quiz .opt:hover { border-color: var(--gold); background: #fffdf6; }
.quiz .opt.correct { background: #eaf3ec; border-color: var(--green); color: var(--green); font-weight: 700; }
.quiz .opt.wrong { background: #fbecec; border-color: #c98; color: #a33; }
.quiz .opt:disabled { cursor: default; }
.quiz-hint { font-size: 12px; color: var(--muted); margin-top: 6px; }

.suggestions { display: flex; flex-wrap: wrap; gap: 8px; padding: 8px 18px; border-top: 1px solid var(--line); background: var(--paper-2); position: relative; }
.suggestions:empty { display: none; }
.suggestions .sug { display: none; }
.suggestions.expanded { padding: 12px 18px; }
.suggestions.expanded .sug { display: block; }
.suggestions.expanded .suggestions-toggle i { transform: rotate(90deg); }
.suggestions-toggle {
  display: none;
  background: transparent; border: none; color: var(--muted); font-size: 13px;
  cursor: pointer; padding: 2px 6px; margin-left: auto; align-self: center; order: 999;
}
.suggestions-toggle i { transition: transform .2s; }
.sug {
  border: 1px solid var(--gold); background: #fff; color: var(--red-deep);
  border-radius: 999px; padding: 7px 13px; font-size: 13px; cursor: pointer; font-family: inherit; transition: .15s;
}
.sug:hover { background: var(--gold-soft); }
.sug.seen { opacity: 0.7; }

/* ---------- Passport ---------- */
.passport-panel { max-width: 600px; }
.passport-body { padding: 18px; overflow-y: auto; }
.passport-body h4 { margin: 18px 0 8px; color: var(--red-deep); font-size: 15px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 6px; text-align: center; }
.stat .num { font-size: 24px; font-weight: 800; color: var(--red); }
.stat .lbl { font-size: 12px; color: var(--muted); }
.map-progress { display: flex; align-items: center; gap: 10px; }
.map-progress span { font-size: 13px; color: var(--muted); min-width: 38px; text-align: right; }

.passport-tasks { display: flex; flex-direction: column; gap: 8px; }
.ptask { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.ptask .pt-ic { font-size: 18px; }
.ptask .pt-name { min-width: 96px; }
.ptask .pt-state { margin-left: auto; font-size: 12px; }
.ptask .pt-state.done { color: var(--green); font-weight: 700; }
.ptask .pt-state.todo { color: var(--muted); }

.badge-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.badge { text-align: center; padding: 12px 6px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); opacity: 0.45; filter: grayscale(0.8); transition: .2s; }
.badge.on { opacity: 1; filter: none; border-color: var(--gold); background: #fffdf4; box-shadow: 0 4px 12px rgba(200,162,74,0.25); }
.badge .b-ic { font-size: 28px; }
.badge .b-name { font-size: 13px; font-weight: 700; color: var(--red-deep); margin-top: 3px; }
.badge .b-desc { font-size: 11px; color: var(--muted); }

.reset-btn { display: block; margin: 22px auto 4px; background: none; border: 1px solid var(--line); color: var(--muted); border-radius: 999px; padding: 7px 18px; cursor: pointer; font-family: inherit; font-size: 13px; }
.reset-btn:hover { border-color: var(--red); color: var(--red); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%) translateY(20px);
  background: linear-gradient(120deg, var(--red), var(--red-deep)); color: #fdf2dc;
  border: 1px solid var(--gold); border-radius: 999px; padding: 12px 24px;
  font-size: 15px; font-weight: 600; box-shadow: var(--shadow); z-index: 120;
  opacity: 0; transition: .35s; pointer-events: none;
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Location banner (chat panel) ---------- */
.loc-banner { width: 100%; height: 170px; overflow: hidden; background: #2b2320; }
.loc-banner img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- Treasures gallery ---------- */
.treasure-section { margin-top: 38px; }
.treasure-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.treasure-card {
  text-align: left; padding: 0; cursor: pointer; font-family: inherit;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
  box-shadow: 0 4px 14px rgba(80,50,20,0.08); transition: .18s;
}
.treasure-card:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(80,50,20,0.18); border-color: var(--gold); }
.tc-img { position: relative; width: 100%; height: 160px; overflow: hidden; background: #2b2320; }
.tc-img img { width: 100%; height: 100%; object-fit: cover; transition: .3s; }
.treasure-card:hover .tc-img img { transform: scale(1.06); }
.tc-zoom {
  position: absolute; right: 8px; bottom: 8px; font-size: 11px; color: #fff;
  background: rgba(40,20,10,0.6); padding: 3px 8px; border-radius: 999px;
}
.tc-body { padding: 11px 13px 14px; }
.tc-where { font-size: 11px; color: var(--gold); font-weight: 700; margin-bottom: 3px; }
.tc-body h4 { font-size: 16px; color: var(--red-deep); }
.tc-body small { font-size: 11px; color: var(--muted); }
.tc-body p { font-size: 12.5px; color: #5b5145; margin-top: 6px; }

/* Treasure lightbox */
.treasure-panel { max-width: 860px; }
.treasure-detail { display: flex; gap: 0; overflow-y: auto; }
.td-figure { flex: 1.1; min-width: 0; background: #1e1714; display: flex; align-items: center; }
.td-figure img { width: 100%; max-height: 78vh; object-fit: contain; display: block; }
.td-text { flex: 1; padding: 18px 20px; overflow-y: auto; }
.td-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.td-tags span { font-size: 11px; color: #6b551f; background: var(--gold-soft); border: 1px solid var(--gold); border-radius: 999px; padding: 1px 9px; }
.td-meta { font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.td-text h4 { color: var(--red-deep); font-size: 15px; margin: 12px 0 5px; }
.td-text p { font-size: 14px; color: #3f372e; }
.td-look { margin-top: 12px; background: #eaf3ec; border: 1px solid #cfe6d5; border-radius: 10px; padding: 10px 12px; font-size: 13.5px; color: #2f5b3c; }
.td-look b { display: block; color: var(--green); margin-bottom: 3px; }
.td-tip { margin-top: 12px; font-size: 12px; color: var(--muted); }

/* Treasure AI chat */
.td-chat {
  margin-top: 18px; padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.td-chat-head {
  font-size: 14px; font-weight: 700; color: var(--red-deep);
  margin-bottom: 10px; display: flex; align-items: center; gap: 6px;
}
.td-chat-body {
  max-height: 240px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 10px;
  padding: 10px 4px; background: var(--paper-2); border-radius: 10px;
  margin-bottom: 10px;
}
.td-chat-body:empty::before {
  content: "点下面的问题快速了解，或自由提问"; font-size: 13px; color: var(--muted);
  text-align: center; padding: 20px 10px; display: block;
}
.td-chat-body .bubble { max-width: 96%; }
.td-chat .suggestions { padding: 8px 4px 12px; border-top: none; background: transparent; }
.td-chat .ask-bar { padding: 8px 0 0; border-top: 1px solid var(--line); background: transparent; }

/* ---------- Lab promo cards ---------- */
.lab-promo { margin-top: 38px; }
.lab-promo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.lab-promo-card {
  display: flex; align-items: flex-start; gap: 12px; text-align: left; cursor: pointer; font-family: inherit;
  background: linear-gradient(135deg, #fffaf0, #fbf0d8); border: 1px solid var(--line); border-radius: 14px; padding: 16px;
  box-shadow: 0 4px 14px rgba(80,50,20,0.07); transition: .18s; position: relative;
}
.lab-promo-card:hover { transform: translateY(-3px); border-color: var(--gold); box-shadow: 0 10px 24px rgba(80,50,20,0.16); }
.lp-icon { font-size: 32px; flex-shrink: 0; }
.lab-promo-card h4 { font-size: 16px; color: var(--red-deep); }
.lab-promo-card small { font-size: 11px; color: var(--gold); font-weight: 700; }
.lab-promo-card p { font-size: 12.5px; color: #5b5145; margin-top: 6px; }
.lp-go { position: absolute; right: 14px; bottom: 12px; font-size: 12px; color: var(--red); font-weight: 700; }

/* ---------- Lab overlay ---------- */
.lab-panel { max-width: 760px; }
.lab-tabs { display: flex; gap: 8px; padding: 12px 16px; background: var(--paper-2); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.lab-tab {
  border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 7px 14px; cursor: pointer;
  font-family: inherit; font-size: 13px; transition: .15s;
}
.lab-tab.active { background: var(--red); color: #fff; border-color: var(--red); }
.lab-stage { padding: 16px 18px; overflow-y: auto; }
.lab-intro { font-size: 13.5px; color: #5b5145; margin-bottom: 12px; }
.lab-canvas-wrap { width: 100%; background: #eef3f1; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.lab-canvas { display: block; width: 100%; height: auto; }
.lab-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 14px 0; }
.lab-field { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink); font-weight: 600; }
.lab-field input[type="range"] { width: 160px; accent-color: var(--red); }
.lab-val { min-width: 56px; color: var(--red-deep); font-weight: 700; }
.lab-btn {
  border: 1px solid var(--gold); background: linear-gradient(120deg, var(--red), var(--red-deep)); color: #fdf2dc;
  border-radius: 999px; padding: 8px 16px; cursor: pointer; font-family: inherit; font-size: 13px; font-weight: 700;
}
.lab-btn.ghost { background: #fff; color: var(--red-deep); }
.lab-btn:hover { filter: brightness(1.05); }
.lab-seg { display: inline-flex; border: 1px solid var(--gold); border-radius: 999px; overflow: hidden; }
.lab-seg-btn { border: none; background: #fff; color: var(--red-deep); padding: 8px 14px; cursor: pointer; font-family: inherit; font-size: 13px; }
.lab-seg-btn.active { background: var(--red); color: #fff; }
.lab-readout { width: 100%; display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: #5b5145; background: var(--paper-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; }
.lab-readout b { color: var(--red-deep); }
.lab-readout .ok { color: var(--green); font-weight: 600; }
.lab-readout .bad { color: #a31515; font-weight: 600; }
.lab-principle { margin-top: 14px; font-size: 13px; color: #4a4137; background: #fbf3df; border: 1px solid var(--gold); border-radius: 10px; padding: 11px 14px; }
.lab-principle b { display: block; color: var(--red-deep); margin-bottom: 4px; }

/* ---------- 会说话的文物 IP ---------- */
.char-section { margin-top: 38px; }
.char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.char-card {
  display: flex; flex-direction: column; text-align: left; padding: 0; cursor: pointer; font-family: inherit;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  box-shadow: 0 4px 14px rgba(80,50,20,0.08); transition: .18s; position: relative;
}
.char-card:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(80,50,20,0.18); border-color: var(--gold); }
.cc-img { position: relative; width: 100%; height: 150px; overflow: hidden; background: linear-gradient(135deg, #3a2a22, #5a3a2c); }
.cc-img img { width: 100%; height: 100%; object-fit: cover; transition: .3s; }
.char-card:hover .cc-img img { transform: scale(1.06); }
.cc-emoji {
  position: absolute; left: 10px; bottom: -18px; width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 24px;
  background: var(--paper); border: 2px solid var(--gold); box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}
.cc-body { padding: 22px 14px 16px; }
.cc-role { font-size: 11px; color: var(--gold); font-weight: 700; margin-bottom: 3px; }
.cc-body h4 { font-size: 17px; color: var(--red-deep); }
.cc-body p { font-size: 12.5px; color: #5b5145; margin-top: 6px; line-height: 1.5; }
.cc-go { display: inline-block; margin-top: 10px; font-size: 12px; color: var(--red); font-weight: 700; }

/* Character chat panel */
.char-panel { max-width: 600px; }
.char-ava { width: 42px; height: 42px; flex-shrink: 0; }
.char-ava .cface-img { display: block; width: 42px; height: 42px; border-radius: 50%; overflow: hidden; border: 2px solid var(--gold); }
.char-ava .cface-img img { width: 100%; height: 100%; object-fit: cover; }
.char-ava .cface-emoji { font-size: 30px; }
.char-toolbar { padding: 12px 18px 0; }
.drama-btn {
  border: 1px solid var(--gold); background: linear-gradient(120deg, var(--gold), #d9b85e); color: var(--red-deep);
  border-radius: 999px; padding: 8px 18px; cursor: pointer; font-family: inherit; font-size: 13.5px; font-weight: 700;
  box-shadow: 0 3px 8px rgba(200,162,74,0.3); transition: .15s;
}
.drama-btn:hover:not(:disabled) { filter: brightness(1.05); transform: translateY(-1px); }
.drama-btn:disabled { opacity: 0.55; cursor: default; }
.char-body .bubble.drama { animation: dramaIn .4s ease; }
.char-body .bubble.drama .content { background: #fffaf0; border-color: var(--gold); }
.drama-line .dl-who { display: inline-block; font-size: 11px; font-weight: 700; color: var(--gold); background: #fbf0d8; border: 1px solid var(--gold); border-radius: 999px; padding: 1px 9px; margin-bottom: 5px; }
@keyframes dramaIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.char-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.drama-stage {
  position: relative;
  background: linear-gradient(180deg, #1c1512 0%, #2a1f18 60%, #1c1512 100%);
  border: 1px solid rgba(200,162,74,0.25); border-radius: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 20px 16px; margin: 10px 0; animation: stageIn .35s ease;
  min-height: 320px;
}
@keyframes stageIn { from { opacity: 0; } to { opacity: 1; } }

.drama-stage-title {
  font-size: 13px; font-weight: 700; color: var(--gold);
  letter-spacing: 3px; text-align: center; margin-bottom: 14px;
  opacity: 0.9;
}

.drama-scene-box {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 100%; max-width: 420px; gap: 12px; overflow: hidden;
}

.drama-scene {
  animation: sceneIn .45s ease;
  max-width: 92%;
}
@keyframes sceneIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: none; }
}

.drama-scene.narrator {
  background: rgba(40,30,22,0.9); border: 1px solid rgba(200,162,74,0.45);
  border-radius: 14px; padding: 16px 18px; text-align: center;
  color: #fff8e8; font-size: 15px; line-height: 1.7;
  box-shadow: 0 4px 24px rgba(0,0,0,0.35);
}

.drama-scene.dialogue-left, .drama-scene.dialogue-right {
  display: flex; align-items: flex-start; gap: 10px;
  width: 100%;
}
.drama-scene.dialogue-left { flex-direction: row; align-self: flex-start; }
.drama-scene.dialogue-right { flex-direction: row-reverse; align-self: flex-end; }

.ds-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--paper-2);
  border: 2px solid var(--gold); display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0; box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.ds-content {
  background: #fff; border: 1px solid var(--gold); border-radius: 14px;
  padding: 10px 14px; box-shadow: 0 3px 14px rgba(0,0,0,0.28);
  max-width: calc(100% - 56px);
}
.drama-scene.dialogue-left .ds-content { border-bottom-left-radius: 4px; }
.drama-scene.dialogue-right .ds-content { border-bottom-right-radius: 4px; }

.ds-who {
  font-size: 11px; font-weight: 700; color: var(--red); margin-bottom: 4px;
}

.ds-text {
  font-size: 14px; color: #2b2320; line-height: 1.65;
}
.drama-scene.narrator .ds-text { color: #fff8e8; }

.typing-cursor::after {
  content: "|"; animation: blink 0.8s infinite; color: var(--gold); margin-left: 2px;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.drama-progress {
  display: flex; gap: 6px; margin-top: 10px;
}
.drama-progress span {
  width: 7px; height: 7px; border-radius: 50%; background: rgba(200,162,74,0.25);
  transition: .25s;
}
.drama-progress span.active { background: var(--gold); transform: scale(1.3); }
.drama-progress span.past { background: rgba(200,162,74,0.55); }

.drama-skip-btn {
  position: absolute; top: 10px; right: 12px;
  background: rgba(255,255,255,0.08); color: rgba(243,230,200,0.65);
  border: 1px solid rgba(200,162,74,0.25); border-radius: 999px;
  padding: 4px 12px; font-size: 12px; cursor: pointer; font-family: inherit;
  transition: .15s;
}
.drama-skip-btn:hover { background: rgba(255,250,240,0.14); color: var(--gold); }
.ai-badge { font-size: 11.5px; font-weight: 700; color: var(--red); background: #fbeeee; border: 1px solid #e7c9c9; border-radius: 999px; padding: 3px 10px; }

/* ---------- 自由提问输入栏（角色 / 定点讲解共用） ---------- */
.ask-bar { display: flex; gap: 8px; padding: 10px 18px 16px; border-top: 1px solid var(--line); background: var(--card); }
.ask-bar input {
  flex: 1; font-family: inherit; font-size: 14px; color: #3a322a;
  border: 1px solid var(--line); border-radius: 999px; padding: 10px 16px; background: #fff; outline: none; transition: .15s;
}
.ask-bar input:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(200,162,74,0.18); }
.ask-bar input:disabled { background: #f1ece2; color: #9a9082; }
.ask-bar button {
  flex-shrink: 0; font-family: inherit; font-size: 14px; font-weight: 700; cursor: pointer;
  border: none; border-radius: 999px; padding: 10px 20px; color: #fff;
  background: linear-gradient(120deg, var(--red), var(--red-deep)); box-shadow: 0 3px 8px rgba(138,26,26,0.25); transition: .15s;
}
.ask-bar button:hover:not(:disabled) { filter: brightness(1.07); transform: translateY(-1px); }
.ask-bar button:disabled { opacity: 0.5; cursor: default; }
.bubble .typing { letter-spacing: 2px; color: var(--gold); animation: typingBlink 1s infinite; }
@keyframes typingBlink { 0%,100% { opacity: .3; } 50% { opacity: 1; } }

@media (max-width: 640px) {
  /* Topbar */
  .topbar { padding: 10px 14px; gap: 10px; }
  .topbar-toggle { display: inline-flex; }
  .brand h1 { font-size: 16px; }
  .seal { width: 38px; height: 38px; font-size: 20px; }
  .chip-btn { padding: 6px 10px; font-size: 12px; gap: 5px; }
  .grade-pick button { padding: 4px 8px; font-size: 12px; }

  /* Main */
  main { padding: 18px 14px 40px; }
  .sec-title { font-size: 18px; }

  /* Hero */
  .hero { padding: 16px 6px 22px; }
  .hero h2 { font-size: 22px; }
  .hero p { font-size: 14px; }
  .primary-btn, .ghost-btn { padding: 10px 18px; font-size: 14px; }

  /* Map */
  .map { max-width: 100%; border-width: 5px; }
  .hotspot .pin { width: 36px; height: 36px; font-size: 14px; }
  .hotspot .pin-label { font-size: 10px; padding: 1px 5px; }
  .avatar { font-size: 20px; }
  .avatar span { font-size: 10px; }

  /* Grids */
  .treasure-grid { grid-template-columns: 1fr; gap: 12px; }
  .tc-img { height: 160px; }
  .char-grid { grid-template-columns: 1fr; gap: 12px; }
  .cc-img { height: 160px; }
  .lab-promo-grid { grid-template-columns: 1fr; gap: 12px; }
  .task-grid { grid-template-columns: 1fr; gap: 12px; }

  /* Overlay / Panels */
  .overlay { padding: 0; align-items: flex-end; }
  .panel { max-height: 100vh; border-radius: 16px 16px 0 0; }
  .panel-head { padding: 12px 14px; }
  .loc-title h3 { font-size: 16px; }
  .chat-body { padding: 12px; }
  .bubble { max-width: 96%; }
  .bubble .face { font-size: 18px; }
  .bubble .content { padding: 10px 12px; }
  .bubble .content p { font-size: 14px; }
  .suggestions { padding: 6px 12px; gap: 6px; }
  .suggestions.expanded { padding: 10px 12px; }
  .suggestions-toggle { display: inline-flex; }
  .sug { padding: 6px 10px; font-size: 12px; }
  .ask-bar { padding: 10px 12px 14px; }
  .ask-bar input { padding: 8px 12px; font-size: 14px; }
  .ask-bar button { padding: 8px 16px; font-size: 14px; }

  /* Treasure lightbox */
  .treasure-panel { max-width: 100%; }
  .treasure-detail { flex-direction: column; }
  .td-figure { flex: none; height: 220px; }
  .td-figure img { max-height: 220px; }
  .td-text { padding: 14px 16px; }
  .td-chat-body { max-height: 200px; }

  /* Passport */
  .passport-panel { max-width: 100%; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .badge-wall { grid-template-columns: repeat(2, 1fr); gap: 10px; }

  /* Lab */
  .lab-panel { max-width: 100%; }
  .lab-canvas-wrap { border-radius: 8px; }
  .lab-field input[type="range"] { width: 120px; }

  /* Character panel */
  .char-panel { max-width: 100%; }
  .drama-stage { min-height: 280px; padding: 16px 12px; }
  .ds-content { padding: 8px 12px; }
  .ds-text { font-size: 13px; }
  .drama-btn { padding: 7px 14px; font-size: 12px; }

  /* Pagination */
  .section-pager { gap: 8px; }
  .pager-info { font-size: 12px; }

  /* Toast */
  .toast { padding: 10px 18px; font-size: 14px; bottom: 20px; }

  /* 3D viewer */
  .viewer3d-panel { max-width: 100%; }
  .viewer3d-stage { height: 55vh; min-height: 280px; }
  .v3d-controls { flex-wrap: wrap; gap: 6px; }
  .v3d-hint { font-size: 12px; }
}

/* ---------- 3D 立体查看器 ---------- */
.tc-3d {
  position: absolute; left: 8px; top: 8px; font-size: 11px; font-weight: 700;
  color: var(--red-deep); background: var(--gold-soft);
  border: 1px solid var(--gold); padding: 2px 8px; border-radius: 999px;
}
.td-figure { position: relative; }
.td-3d-btn {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%);
  background: linear-gradient(120deg, var(--red), var(--red-deep)); color: #fdf2dc;
  border: 1px solid var(--gold); padding: 9px 16px; border-radius: 999px;
  font-family: inherit; font-size: 13px; font-weight: 700; cursor: pointer;
  box-shadow: var(--shadow); white-space: nowrap;
}
.td-3d-btn:hover { filter: brightness(1.08); }

.viewer3d-panel { max-width: 900px; width: 100%; }
.viewer3d-stage {
  position: relative; width: 100%; height: 62vh; min-height: 360px;
  background: radial-gradient(circle at 50% 35%, #3a2f2a 0%, #1c1512 80%);
  overflow: hidden;
}
#viewer3dCanvas { width: 100%; height: 100%; display: block; touch-action: none; }
.v3d-hotspots { position: absolute; inset: 0; pointer-events: none; }
.v3d-hot {
  position: absolute; transform: translate(-50%, -50%); pointer-events: auto;
  background: none; border: none; cursor: pointer; padding: 0;
  display: flex; align-items: center; justify-content: center;
}
.v3d-hot-dot {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--gold); color: var(--red-deep); font-weight: 800; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid #fff; box-shadow: 0 0 0 3px rgba(200,162,74,0.45), 0 2px 8px rgba(0,0,0,0.5);
  animation: v3dPulse 1.8s infinite;
}
.v3d-hot.active .v3d-hot-dot { background: var(--red); color: #fff; }
@keyframes v3dPulse {
  0%,100% { box-shadow: 0 0 0 3px rgba(200,162,74,0.45), 0 2px 8px rgba(0,0,0,0.5); }
  50% { box-shadow: 0 0 0 7px rgba(200,162,74,0.15), 0 2px 8px rgba(0,0,0,0.5); }
}
.v3d-loading {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  color: #f3e6c8; font-size: 14px; background: rgba(0,0,0,0.35);
  padding: 10px 18px; border-radius: 999px; border: 1px solid var(--gold);
}
.v3d-info {
  background: rgba(255,250,240,0.96); border: 1px solid var(--gold); border-radius: 12px;
  padding: 11px 14px; box-shadow: var(--shadow);
  margin: 8px 16px;
}
.v3d-info b { color: var(--red-deep); font-size: 14px; }
.v3d-info p { color: #5b5145; font-size: 13px; margin-top: 4px; line-height: 1.5; }
.viewer3d-toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 12px 16px; background: var(--paper-2); border-top: 1px solid var(--line);
}
.v3d-hint { font-size: 12.5px; color: var(--muted); }
.v3d-controls { display: flex; gap: 8px; margin-left: auto; }
.v3d-btn {
  background: #fff; color: var(--red-deep); border: 1px solid var(--gold);
  border-radius: 999px; padding: 6px 13px; font-family: inherit; font-size: 13px;
  font-weight: 700; cursor: pointer; transition: .15s;
}
.v3d-btn:hover { background: var(--gold-soft); }
.v3d-credit { flex-basis: 100%; font-size: 11px; color: var(--muted); }

@media (max-width: 620px) {
  .v3d-controls { margin-left: 0; }
  .viewer3d-stage { height: 52vh; }
}

.section-more {
  font-size: 13px; font-weight: 700; font-family: inherit; cursor: pointer;
  color: var(--red-deep); background: var(--gold-soft);
  border: 1px solid var(--gold); border-radius: 999px;
  padding: 8px 22px; transition: .15s;
}
.section-more:hover { background: var(--gold); color: #fff; }
.section-more:disabled { opacity: 0.45; cursor: default; transform: none; filter: none; }
.section-pager {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  margin-top: 16px;
}
.section-pager .pager-info { font-size: 13px; color: var(--muted); }

/* ---------- Footer ---------- */
.page-foot {
  margin-top: 40px;
  padding: 28px 18px 38px;
  text-align: center;
  font-size: 13px;
  color: rgba(160, 140, 110, 0.7);
  background: linear-gradient(180deg, var(--paper-2), var(--paper));
  border-top: 1px solid var(--line);
  letter-spacing: 1.5px;
}
.page-foot .fa-star {
  display: block;
  font-size: 18px;
  color: var(--gold);
  margin-bottom: 10px;
  opacity: 0.6;
}