:root{--porcelain-blue: #1b3a6b;--porcelain-blue-deep: #12294d;--glaze-white: #f4f9ff;--kintsugi-gold: #c9a227;--ink: #22303f;--hud-font: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", serif;--ui-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;overflow:hidden;background:#dde8f4;font-family:var(--ui-font);color:var(--ink)}#app{position:relative;width:100vw;height:100vh}#scene-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}.hud{position:absolute;inset:0;pointer-events:none;z-index:10}.hud button{pointer-events:auto;cursor:pointer;font-family:inherit}.hud-top{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;padding:18px 26px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--porcelain-blue);color:var(--glaze-white);font-family:var(--hud-font);font-size:24px;box-shadow:0 6px 18px #1b3a6b47}.brand-text h1{margin:0;font-family:var(--hud-font);font-size:18px;letter-spacing:2px;color:var(--porcelain-blue-deep)}.brand-text p{margin:2px 0 0;font-size:11px;letter-spacing:4px;color:#6b7d92}.ghost-btn{border:1px solid rgba(27,58,107,.35);background:#f4f9ffb3;color:var(--porcelain-blue);border-radius:999px;padding:8px 18px;font-size:13px;letter-spacing:2px;transition:all .2s ease;backdrop-filter:blur(6px)}.ghost-btn:hover{background:var(--porcelain-blue);color:var(--glaze-white)}.fire-btn{border:1px solid rgba(27,58,107,.35);background:#f4f9ffb3;color:var(--porcelain-blue);border-radius:8px;font-size:12px;letter-spacing:1px;transition:all .18s ease;cursor:pointer}.fire-btn:hover:not(:disabled){background:#1b3a6b14}.fire-btn.active{background:var(--porcelain-blue);color:var(--glaze-white);border-color:var(--porcelain-blue);box-shadow:0 2px 6px #1b3a6b40}.fire-btn:disabled{opacity:.5;cursor:not-allowed}.hud-steps{position:absolute;top:50%;right:18px;transform:translateY(-50%);display:flex;flex-direction:column;gap:8px}.step{display:flex;align-items:center;gap:8px;flex-direction:row-reverse;border:none;background:#f4f9ff8c;border-radius:999px;padding:6px 8px;opacity:.75;transition:all .25s ease;backdrop-filter:blur(6px)}.step-dot{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:#1b3a6b26;color:var(--porcelain-blue);font-size:12px;flex-shrink:0}.step-label{font-size:12px;letter-spacing:1px;color:var(--porcelain-blue-deep);white-space:nowrap}.step.active{opacity:1;background:var(--porcelain-blue)}.step.active .step-dot{background:var(--glaze-white);color:var(--porcelain-blue)}.step.active .step-label{color:var(--glaze-white)}.step.done{opacity:.95}.step.done .step-dot{background:var(--kintsugi-gold);color:#2a2103}.knowledge-card{position:absolute;left:26px;top:96px;width:280px;background:#f4f9ffeb;border:1px solid rgba(27,58,107,.18);border-left:4px solid var(--porcelain-blue);border-radius:14px;padding:16px 18px;box-shadow:0 12px 32px #1b3a6b29;backdrop-filter:blur(10px);pointer-events:auto}.knowledge-card h3{margin:0 0 8px;font-family:var(--hud-font);font-size:16px;color:var(--porcelain-blue);letter-spacing:1px}.kc-body p{margin:4px 0;font-size:13px;line-height:1.7;color:#43566b}.hud-bottom{position:absolute;left:0;right:0;bottom:0;display:flex;justify-content:center;padding:0 26px 34px}.narrator{display:flex;align-items:flex-start;gap:12px;max-width:760px;width:100%}.narrator[hidden]{display:none}.narrator-avatar{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(150deg,#fff,#d7e4f5);border:2px solid var(--porcelain-blue);color:var(--porcelain-blue);font-family:var(--hud-font);font-size:22px;flex-shrink:0;box-shadow:0 6px 18px #1b3a6b33}.narrator-bubble{background:#f4f9fff0;border-radius:2px 14px 14px;padding:14px 20px;font-size:15px;line-height:1.8;color:var(--ink);box-shadow:0 10px 28px #1b3a6b24;backdrop-filter:blur(10px);cursor:pointer;user-select:none;transition:transform .12s ease,box-shadow .12s ease}.narrator-bubble:hover{transform:translateY(-1px);box-shadow:0 14px 32px #1b3a6b2e}.narrator-bubble:active{transform:translateY(0)}.overlay{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(circle at 50% 40%,#f4f9ff8c,#c5d6ebeb);backdrop-filter:blur(3px);pointer-events:auto;transition:opacity .6s ease,visibility .6s ease}.overlay--hidden{opacity:0;visibility:hidden;pointer-events:none}.overlay-inner{text-align:center;padding:40px;animation:rise .9s cubic-bezier(.16,1,.3,1) both}.overlay-kicker{margin:0 0 10px;font-size:12px;letter-spacing:6px;color:#7a8ea6}.overlay-title{margin:0 0 18px;font-family:var(--hud-font);font-size:52px;letter-spacing:6px;color:var(--porcelain-blue-deep);display:flex;flex-direction:column;gap:6px}.overlay-title span{font-size:24px;letter-spacing:14px;color:var(--porcelain-blue)}.overlay-sub{margin:0 auto 34px;max-width:460px;font-size:14px;line-height:1.9;color:#54687e}.primary-btn{border:none;background:var(--porcelain-blue);color:var(--glaze-white);border-radius:999px;padding:14px 46px;font-size:16px;letter-spacing:6px;box-shadow:0 14px 34px #1b3a6b52;transition:transform .2s ease,box-shadow .2s ease}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 18px 42px #1b3a6b66}@keyframes rise{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.era-panel{position:absolute;left:26px;top:96px;width:320px;max-height:calc(100vh - 250px);display:flex;flex-direction:column;background:#f4f9ffeb;border:1px solid rgba(27,58,107,.18);border-left:4px solid var(--kintsugi-gold);border-radius:14px;padding:18px 20px;box-shadow:0 12px 32px #1b3a6b29;backdrop-filter:blur(10px);pointer-events:auto;animation:rise .5s cubic-bezier(.16,1,.3,1) both}.era-scroll{flex:1 1 auto;min-height:0;overflow-y:auto;padding-right:4px}.era-years{margin:0;font-size:11px;letter-spacing:2px;color:#7a8ea6}.era-title{margin:6px 0 4px;font-family:var(--hud-font);font-size:20px;letter-spacing:1px;color:var(--porcelain-blue)}.era-tagline{margin:0 0 12px;font-size:12px;line-height:1.6;color:var(--kintsugi-gold);filter:saturate(.9) brightness(.85)}.era-body p{margin:6px 0;font-size:13px;line-height:1.8;color:#43566b}.era-know{margin-top:12px;padding-top:10px;border-top:1px dashed rgba(27,58,107,.25)}.era-know h4{margin:0 0 6px;font-family:var(--hud-font);font-size:13px;letter-spacing:1px;color:var(--porcelain-blue)}.era-know p{margin:4px 0;font-size:12px;line-height:1.7;color:#5b6f85}.timeline{position:absolute;left:50%;bottom:118px;transform:translate(-50%);display:flex;align-items:flex-end;gap:0;pointer-events:auto;padding:0;max-width:92vw}.timeline:before{content:"";position:absolute;left:0;right:0;bottom:30px;height:2px;background:linear-gradient(90deg,transparent,rgba(27,58,107,.35),transparent)}.tl-node{position:relative;display:flex;flex-direction:column;align-items:center;gap:6px;border:none;background:transparent;padding:6px 22px;opacity:.6;transition:all .25s ease}.tl-node:hover{opacity:.9;transform:translateY(-2px)}.tl-era{font-family:var(--hud-font);font-size:22px;color:var(--porcelain-blue-deep);letter-spacing:2px}.tl-dot{width:12px;height:12px;border-radius:50%;background:var(--glaze-white);border:2px solid var(--porcelain-blue);transition:all .25s ease}.tl-title{font-size:11px;letter-spacing:1px;color:#6b7d92;white-space:nowrap}.tl-node.active{opacity:1}.tl-node.active .tl-era{color:var(--porcelain-blue);text-shadow:0 2px 12px rgba(27,58,107,.35)}.tl-node.active .tl-dot{background:var(--kintsugi-gold);border-color:var(--kintsugi-gold);box-shadow:0 0 0 6px #c9a22738}.tl-node.active .tl-title{color:var(--porcelain-blue-deep);font-weight:600}.tl-node.visited .tl-dot{background:var(--porcelain-blue)}.era-next{margin-top:12px;padding-top:12px;border-top:1px solid rgba(27,58,107,.16);flex:0 0 auto}.era-next-btn{width:100%;padding:12px 10px;font-size:14px;letter-spacing:2px}.craft-panel{position:absolute;left:26px;top:96px;width:336px;max-height:calc(100vh - 220px);display:flex;flex-direction:column;background:#f4f9ffeb;border:1px solid rgba(27,58,107,.18);border-left:4px solid var(--porcelain-blue);border-radius:14px;padding:18px 20px;box-shadow:0 12px 32px #1b3a6b29;backdrop-filter:blur(10px);pointer-events:auto;animation:rise .5s cubic-bezier(.16,1,.3,1) both}.craft-controls{margin-top:12px;padding-top:10px;border-top:1px dashed rgba(27,58,107,.25)}.craft-controls:empty{display:none}.ctl-row{display:flex;align-items:center;gap:10px;margin:8px 0;font-size:12px;color:#43566b}.ctl-row input[type=range]{flex:1;accent-color:var(--porcelain-blue)}.ctl-hint{margin:6px 0 2px;font-size:12px;line-height:1.7;color:var(--porcelain-blue)}.ctl-toggle{display:inline-flex;align-items:center;gap:4px;cursor:pointer;user-select:none}.ctl-toggle input{accent-color:var(--porcelain-blue)}.ctl-toggle input,.ctl-toggle{pointer-events:auto}.craft-score{font-family:var(--hud-font);font-size:18px;color:var(--kintsugi-gold);filter:saturate(.9) brightness(.85);min-width:42px}.craft-foot{margin-top:12px;padding-top:12px;border-top:1px solid rgba(27,58,107,.16);flex:0 0 auto}.craft-progress{height:6px;border-radius:999px;background:#1b3a6b24;overflow:hidden;margin-bottom:10px}.craft-progress-bar{height:100%;width:0%;border-radius:999px;background:linear-gradient(90deg,var(--kintsugi-gold),var(--porcelain-blue));transition:width .15s ease}#craft-next-btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}.showcase-panel{border-left-color:var(--kintsugi-gold)}.showcase-stars{margin-left:10px;font-size:15px;letter-spacing:2px;color:var(--kintsugi-gold);filter:saturate(.9) brightness(.85)}.score-bars{margin:12px 0 8px;padding:10px 0 4px;border-top:1px dashed rgba(27,58,107,.25)}.score-bar-row{display:flex;align-items:center;gap:8px;margin:7px 0;font-size:12px;color:#43566b}.score-bar-label{min-width:72px;flex-shrink:0}.score-bar{flex:1;height:6px;border-radius:999px;background:#1b3a6b24;overflow:hidden}.score-bar-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--kintsugi-gold),var(--porcelain-blue));transition:width .6s ease}.showcase-back-btn{width:100%;padding:10px;font-size:13px;letter-spacing:2px}@media (max-width: 720px){.overlay-title{font-size:36px}.hud-steps{right:10px}.step-label{display:none}.knowledge-card{width:210px;left:14px}.era-panel{width:240px;left:14px;max-height:calc(100vh - 280px)}.craft-panel{width:250px;left:14px;max-height:calc(100vh - 260px)}.timeline{bottom:132px}.tl-node{padding:6px 10px}.tl-title{display:none}}.narrator.has-xiaoqi .narrator-avatar{display:none}.xiaoqi-2d{width:118px;flex:none;align-self:flex-end;margin:0 6px -14px 0;animation:xq-bob 3.2s ease-in-out infinite;transform-origin:bottom center;pointer-events:none;filter:drop-shadow(0 4px 8px rgba(22,64,126,.18))}@keyframes xq-bob{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}.xq-mouth{transform-box:fill-box;transform-origin:center top}.xiaoqi-2d.speaking .xq-mouth{animation:xq-talk .26s ease-in-out infinite}@keyframes xq-talk{0%,to{transform:scaleY(.5)}50%{transform:scaleY(1.2)}}.xq-arm{transform-box:fill-box;transform-origin:22% 6%}.xiaoqi-2d.speaking .xq-arm{animation:xq-wave .5s ease-in-out infinite}@keyframes xq-wave{0%,to{transform:rotate(0)}50%{transform:rotate(-26deg)}}.xq-eyes{transform-box:fill-box;transform-origin:center;transition:transform 70ms ease}.xq-eyes.is-blink{transform:scaleY(.12)}