:root{--ink:#0d2a38;--deep:#102f3b;--deep2:#173d49;--paper:#f6efe0;--paper2:#fffaf0;--gold:#d5aa57;--clay:#a85d3b;--jade:#2f7569;--muted:#66757c;--line:rgba(16,47,59,.16);--shadow:0 18px 45px rgba(15,39,47,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}.skip-link{position:fixed;left:10px;top:-100px;z-index:9999;background:#fff;padding:8px 14px}.skip-link:focus{top:10px}.global-header{height:68px;background:#0e2937;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(16px,4vw,60px);position:sticky;top:0;z-index:1000;border-bottom:1px solid rgba(255,255,255,.12)}.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}.brand img{width:36px;height:36px}.brand strong{font-size:18px}.global-header nav{display:flex;gap:26px}.global-header nav a{color:#dce8e9;text-decoration:none;font-size:14px}.global-header nav a.active,.global-header nav a:hover{color:#f0ca77}.course-bar{position:sticky;top:68px;z-index:900;min-height:52px;background:rgba(246,239,224,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:8px clamp(16px,4vw,60px);gap:20px}.course-bar a{color:var(--ink);text-decoration:none;font-size:13px}.course-bar>div{display:flex;gap:18px;flex-wrap:wrap}.course-bar>span{font-weight:800;color:var(--clay)}.shell,.hero-shell{width:min(1160px,calc(100% - 36px));margin:auto}.hero{min-height:640px;background:radial-gradient(circle at 78% 18%,rgba(213,170,87,.16),transparent 27%),linear-gradient(135deg,#0d2935,#173e48 65%,#0f2835);color:#fff;display:grid;align-items:center;position:relative;overflow:hidden}.hero:after{content:"";position:absolute;inset:auto -8% -38% 35%;height:400px;border-radius:50%;border:1px solid rgba(213,170,87,.28)}.hero-shell{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;padding:80px 0 100px;position:relative;z-index:1}.eyebrow,.section-title>p{color:var(--gold);font-weight:700;letter-spacing:.12em;font-size:13px}.hero h1,.section-title h2{font-family:STKaiti,KaiTi,serif}.hero h1{font-size:clamp(48px,6vw,78px);line-height:1.05;margin:14px 0}.hero .subtitle{font-size:22px;color:#f1d69a}.hero .lead{font-size:17px;max-width:700px;color:#d8e2e3}.hero-actions{display:flex;gap:14px;margin:30px 0}.button{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:12px 22px;text-decoration:none;font-weight:700;border:1px solid transparent;cursor:pointer}.button.primary{background:var(--gold);color:#18313a}.button.ghost{border-color:rgba(255,255,255,.4);color:#fff}.button.compact{padding:9px 18px}.hero-note{display:flex;gap:12px;align-items:flex-start;border-left:3px solid var(--gold);padding-left:14px;color:#dce8e8}.hero-note b{white-space:nowrap;color:#f4d88f}.hero-visual img{width:100%;filter:drop-shadow(0 25px 40px rgba(0,0,0,.35));border-radius:24px}.hero-visual small{display:block;text-align:center;color:#b9c9ca;margin-top:8px}.section{padding:88px 0}.section-title{margin-bottom:30px}.section-title h2{font-size:clamp(34px,4vw,52px);line-height:1.15;margin:4px 0 6px}.section-title small{color:var(--muted)}.section-title.light h2,.section-title.light{color:#fff}.section-title.light small{color:#bcd0d3}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.method-grid article{background:var(--paper2);border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--shadow)}.method-grid span{font-size:13px;color:var(--clay);font-weight:800}.method-grid h3{font-size:22px;margin:10px 0}.rule-strip{margin-top:20px;border-radius:18px;background:#173b45;color:#fff;padding:18px 22px;display:flex;gap:18px}.rule-strip b{color:var(--gold)}.timeline-section,.lantian-section,.games-section{background:#173743;color:#fff}.time-nodes{display:grid;grid-template-columns:repeat(5,1fr);position:relative;margin:40px 0}.time-nodes:before{content:"";position:absolute;left:5%;right:5%;top:23px;height:2px;background:rgba(255,255,255,.25)}.time-node{position:relative;background:transparent;color:#fff;border:0;padding:0 8px;text-align:center;cursor:pointer}.time-node i{display:block;width:16px;height:16px;border-radius:50%;margin:15px auto 12px;background:var(--gold);box-shadow:0 0 0 8px rgba(213,170,87,.16)}.time-node strong{display:block;font-size:16px}.time-node span{font-size:12px;color:#c1d0d2}.time-node.active i{background:#fff;box-shadow:0 0 0 10px rgba(255,255,255,.16)}.map-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}.map-card,.site-detail{border:1px solid rgba(255,255,255,.17);border-radius:26px;background:rgba(255,255,255,.06);padding:24px}.map-shape{height:390px;position:relative;background:radial-gradient(circle at 35% 55%,rgba(213,170,87,.13),transparent 28%),linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.02));clip-path:polygon(12% 21%,28% 8%,49% 12%,63% 24%,84% 22%,93% 39%,83% 57%,91% 71%,72% 82%,56% 94%,39% 87%,25% 77%,10% 66%,15% 49%,5% 36%)}.compass{position:absolute;right:9%;top:7%;font-weight:800;color:#e8c875}.map-point{position:absolute;border:0;background:transparent;color:#fff;cursor:pointer;transform:translate(-50%,-50%);z-index:2}.map-point i{display:block;width:14px;height:14px;border-radius:50%;background:#efc66f;box-shadow:0 0 0 7px rgba(239,198,111,.16);margin:auto}.map-point b{display:block;white-space:nowrap;margin-top:7px;font-size:13px;text-shadow:0 2px 6px #000}.map-point.active i{background:#fff;box-shadow:0 0 0 9px rgba(255,255,255,.2)}.p-yuanmou{left:30%;top:70%}.p-lantian{left:49%;top:43%}.p-yunxian{left:51%;top:57%}.p-beijing{left:66%;top:32%}.p-shandingdong{left:71%;top:37%}.map-card>p{font-size:12px;color:#bcd0d3;margin:12px 0 0}.site-detail h3{font-family:STKaiti,KaiTi,serif;font-size:34px;margin:0 0 4px}.site-detail .site-time{color:#efc66f;font-weight:800}.site-detail ul{padding-left:20px}.site-detail .boundary{border-left:3px solid #d26d4b;padding-left:12px;color:#e8d8cf}.site-card-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.site-card{background:#fffaf0;border:1px solid var(--line);border-radius:20px;padding:20px;cursor:pointer;text-align:left;color:var(--ink);min-height:220px}.site-card:hover,.site-card.active{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(168,93,59,.5)}.site-card span{font-size:12px;color:var(--clay);font-weight:700}.site-card h3{font-family:STKaiti,KaiTi,serif;font-size:26px;margin:8px 0}.site-card small{color:var(--muted)}.split-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:start}.intro-copy{font-size:17px}.evidence-chain{display:grid;gap:12px}.evidence-chain article{display:grid;grid-template-columns:70px 190px 1fr;gap:18px;align-items:center;background:#fffaf0;border-radius:16px;padding:16px 18px;border:1px solid var(--line)}.evidence-chain span{color:var(--clay);font-weight:800}.evidence-chain p{margin:0}.evidence-chain .uncertain{border-color:#c66b51;background:#fff2eb}.question-box{background:#173743;color:#fff;border-radius:24px;padding:28px;position:sticky;top:140px}.question-box>span{color:#efc66f;font-weight:800}.question-box h3{font-size:24px}.question-box button{border:0;border-radius:999px;padding:11px 16px;background:#efc66f;color:#173743;font-weight:800}.question-box p{color:#dce8e8}.lantian-compare{display:grid;grid-template-columns:1fr 80px 1fr;align-items:center;gap:20px}.lantian-compare article{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:24px;padding:28px}.lantian-compare article span{color:#efc66f}.lantian-compare article strong{display:block;font-size:28px;margin:8px 0}.lantian-compare article small{color:#bcd0d3}.not-equal{text-align:center;font-size:44px;color:#efc66f}.shangchen-note{margin-top:24px;background:#f7edd5;color:#173743;border-radius:18px;padding:20px}.shangchen-note b{color:#9a4f34}.shangchen-note p{margin-bottom:0}.evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.evidence-card{border:1px solid var(--line);border-radius:20px;padding:22px;background:#fffaf0;cursor:pointer;text-align:left;color:var(--ink)}.evidence-card h3{margin:0 0 6px}.evidence-card small{color:var(--muted)}.evidence-card.active{border-color:#a85d3b;box-shadow:0 0 0 3px rgba(168,93,59,.1)}.evidence-detail{margin-top:18px;min-height:150px;background:#173743;color:#fff;border-radius:22px;padding:24px}.evidence-detail .detail-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.evidence-detail .detail-grid div{background:rgba(255,255,255,.08);padding:14px;border-radius:14px}.evidence-detail b{display:block;color:#efc66f}.game-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}.game-tabs button{border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:10px 16px;color:#fff;background:transparent;cursor:pointer}.game-tabs button.active{background:#efc66f;color:#173743}.game-panel{display:none;background:#f8f0df;color:var(--ink);border-radius:26px;padding:26px}.game-panel.active{display:block}.game-head{display:flex;justify-content:space-between;gap:20px;align-items:start}.game-head h3{font-size:28px;margin:0}.game-head p{margin:0;color:var(--muted)}.game-head>strong{color:var(--clay);font-size:22px}.match-board{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:22px}.match-cards,.match-targets{display:grid;gap:10px}.match-item,.match-target{border:1px solid var(--line);background:#fff;border-radius:14px;padding:14px;text-align:left;cursor:pointer}.match-item.selected{border-color:#a85d3b;box-shadow:0 0 0 3px rgba(168,93,59,.12)}.match-item.done,.match-target.done{opacity:.45;pointer-events:none}.feedback{min-height:28px;color:#8b452e;font-weight:700}.inference-list{display:grid;gap:14px;margin-top:20px}.inference-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.inference-item p{margin-top:0}.choice-row{display:flex;gap:8px;flex-wrap:wrap}.choice-row button{border:1px solid var(--line);background:#f8f0df;border-radius:999px;padding:8px 12px;cursor:pointer}.choice-row button.correct{background:#dff1e9;border-color:#4b8b72}.choice-row button.wrong{background:#f9ded6;border-color:#b65b42}.mini-map{height:340px;position:relative;background:linear-gradient(145deg,#d9ccb3,#f1e7d1);clip-path:polygon(12% 21%,28% 8%,49% 12%,63% 24%,84% 22%,93% 39%,83% 57%,91% 71%,72% 82%,56% 94%,39% 87%,25% 77%,10% 66%,15% 49%,5% 36%);margin:22px 0}.mini-map button{position:absolute;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;border:0;background:#173743;color:#fff;font-weight:800;cursor:pointer}.m-yuanmou{left:30%;top:70%}.m-lantian{left:49%;top:43%}.m-yunxian{left:51%;top:57%}.m-beijing{left:66%;top:32%}.m-shandingdong{left:71%;top:39%}.mini-map button.correct{background:#2f8067}.mini-map button.wrong{background:#b0523c}.summary-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:34px}.takeaways{display:grid;gap:14px;padding-left:0;counter-reset:item}.takeaways li{list-style:none;background:#fffaf0;border-radius:18px;padding:18px 20px;border:1px solid var(--line)}.recall-card{background:#173743;color:#fff;border-radius:24px;padding:28px}.recall-card>span{color:#efc66f;font-weight:800}.recall-card label{display:block;margin:12px 0}.recall-card .button{margin-top:16px}.sources-section{padding:30px 0 90px}.sources-section details{background:#efe4ce;border-radius:18px;padding:18px}.sources-section summary{font-weight:800;cursor:pointer}.sources-section a{color:#1f5c64}.sources-section li{margin:8px 0}footer{background:#0d2935;color:#dce8e8;padding:28px clamp(16px,4vw,60px);display:flex;gap:20px;justify-content:space-between;align-items:center}footer small{color:#9fb4b8}.mobile-dock{display:none}
@media(max-width:900px){.global-header nav{display:none}.course-bar>div{display:none}.hero{min-height:auto}.hero-shell,.map-layout,.split-layout,.summary-layout{grid-template-columns:1fr}.hero-shell{padding:56px 0 70px}.hero-visual{order:-1}.hero h1{font-size:50px}.method-grid,.evidence-grid{grid-template-columns:1fr}.site-card-grid{grid-template-columns:repeat(2,1fr)}.time-nodes{grid-template-columns:1fr;gap:8px}.time-nodes:before{display:none}.time-node{display:grid;grid-template-columns:40px 1fr;text-align:left;align-items:center}.time-node i{grid-row:1/3;margin:0}.lantian-compare{grid-template-columns:1fr}.not-equal{transform:rotate(90deg)}.match-board{grid-template-columns:1fr}.question-box{position:static}.evidence-chain article{grid-template-columns:1fr;gap:4px}footer{flex-direction:column;align-items:flex-start;padding-bottom:90px}.mobile-dock{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:1100;background:#0d2935;border-top:1px solid rgba(255,255,255,.15);padding-bottom:env(safe-area-inset-bottom)}.mobile-dock a{text-decoration:none;color:#bcd0d3;text-align:center;padding:8px 3px}.mobile-dock a.active{color:#efc66f}.mobile-dock span,.mobile-dock small{display:block}.mobile-dock span{font-weight:800}.mobile-dock small{font-size:11px}}@media(max-width:560px){.shell,.hero-shell{width:min(100% - 24px,1160px)}.section{padding:64px 0}.site-card-grid{grid-template-columns:1fr}.hero h1{font-size:42px}.hero .subtitle{font-size:18px}.map-shape{height:300px}.site-detail h3{font-size:28px}.rule-strip{flex-direction:column;gap:4px}.evidence-detail .detail-grid{grid-template-columns:1fr}.game-panel{padding:18px}.game-head{flex-direction:column}.global-header{height:60px}.course-bar{top:60px}}

/* V0.2.0 图文整合 */
.hero-visual{position:relative;overflow:hidden;background:#0f2e38;box-shadow:0 24px 60px rgba(0,0,0,.32)}
.hero-visual img{width:100%;height:100%;min-height:420px;display:block;object-fit:cover;object-position:center}
.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 58%,rgba(10,36,44,.72));pointer-events:none}
.hero-visual small{position:absolute;z-index:2;right:14px;bottom:12px;max-width:82%;background:rgba(9,34,42,.86);color:#f3d18a;border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:6px 11px;font-size:12px;line-height:1.25}
.lesson-wide-figure,.lesson-scene-figure,.lesson-card-figure,.game-cover-figure{position:relative;margin:24px 0 0;border-radius:22px;overflow:hidden;background:#d9ccb5;box-shadow:0 16px 38px rgba(16,46,57,.14)}
.lesson-wide-figure img{width:100%;height:430px;display:block;object-fit:cover}
.lesson-scene-figure img{width:100%;height:460px;display:block;object-fit:cover;object-position:center}
.lesson-card-figure img{width:100%;height:330px;display:block;object-fit:cover}
.lesson-wide-figure figcaption,.lesson-scene-figure figcaption,.lesson-card-figure figcaption,.game-cover-figure figcaption{position:absolute;right:12px;bottom:10px;background:rgba(9,34,42,.86);color:#f3d18a;border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:5px 10px;font-size:12px;line-height:1.2;max-width:86%}
.two-visual-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.two-visual-grid .lesson-card-figure{margin:0}
.evidence-table-figure img{object-position:center}
.fire-figure{max-width:680px;margin:24px auto 0}
.game-visual-launchers{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:20px 0 24px}
.game-visual-card{appearance:none;border:1px solid rgba(255,255,255,.2);border-radius:20px;padding:0 0 14px;overflow:hidden;background:rgba(255,255,255,.07);color:#fff;text-align:left;cursor:pointer;transition:.2s ease}
.game-visual-card:hover,.game-visual-card.active{transform:translateY(-3px);background:rgba(255,255,255,.13);border-color:#e9c36d}
.game-cover-figure{margin:0;border-radius:19px 19px 0 0;box-shadow:none;height:190px}
.game-cover-figure img{width:100%;height:100%;display:block;object-fit:cover}
.game-visual-card strong{display:block;padding:12px 16px 0;font-size:20px;font-family:STKaiti,KaiTi,serif}
@media(max-width:900px){.hero-visual img{min-height:340px}.lesson-wide-figure img,.lesson-scene-figure img{height:340px}.two-visual-grid{grid-template-columns:1fr}.game-visual-launchers{grid-template-columns:1fr 1fr}.game-visual-launchers .game-visual-card:last-child{grid-column:1/-1}.game-cover-figure{height:220px}}
@media(max-width:560px){.hero-visual img{min-height:250px}.hero-visual small{left:10px;right:10px;max-width:none;border-radius:12px}.lesson-wide-figure,.lesson-scene-figure,.lesson-card-figure{border-radius:16px}.lesson-wide-figure img,.lesson-scene-figure img,.lesson-card-figure img{height:250px}.game-visual-launchers{grid-template-columns:1fr}.game-visual-launchers .game-visual-card:last-child{grid-column:auto}.game-cover-figure{height:240px}}


/* V0.3.0 课程音频系统 */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.header-actions{display:flex;align-items:center;gap:18px}.sound-toggle{display:inline-flex;align-items:center;gap:7px;min-height:38px;padding:7px 11px;border:1px solid rgba(255,255,255,.24);border-radius:999px;background:rgba(255,255,255,.08);color:#fff;cursor:pointer;font-size:12px;font-weight:800}.sound-toggle:hover{border-color:#efc66f}.sound-toggle.is-off{background:rgba(255,255,255,.04);color:#aebec1}.sound-toggle-icon{font-size:15px;line-height:1}
.audio-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:9px 14px;border:1px solid rgba(16,47,59,.22);border-radius:999px;background:#fffaf0;color:#173743;cursor:pointer;font-weight:800;line-height:1.2;transition:transform .18s ease,border-color .18s ease,background .18s ease;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.audio-button:hover:not(:disabled){transform:translateY(-1px);border-color:#d5aa57}.audio-button:focus-visible,.sound-toggle:focus-visible{outline:3px solid rgba(213,170,87,.3);outline-offset:3px}.audio-button:disabled{cursor:not-allowed;opacity:.48}.audio-icon{display:grid;place-items:center;min-width:18px;font-size:16px}.audio-state{font-size:11px;color:#7a6651}.audio-button.is-playing{background:#2f7569;border-color:#2f7569;color:#fff}.audio-button.is-playing .audio-state{color:#d5eee7}.audio-button.is-paused{background:#e5eef2;border-color:#6f98a5}.audio-button.is-loading{cursor:progress}.hero-audio{border-color:rgba(255,255,255,.48);background:rgba(7,27,35,.58);color:#fff}.hero-audio .audio-state,.light-audio .audio-state,.closing-audio .audio-state{color:#f1d89e}.light-audio{border-color:rgba(255,255,255,.34);background:rgba(255,255,255,.08);color:#fff}.section-audio{margin-top:12px}.audio-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.audio-guide-section,.learning-guide{padding:28px 0;background:#eadfc8}.audio-guide-card,.learning-guide-card{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;background:#fffaf0;border:1px solid rgba(16,47,59,.14);border-radius:22px;padding:24px;box-shadow:0 12px 30px rgba(15,39,47,.08)}.audio-guide-card h2,.learning-guide-card h2{font-family:STKaiti,KaiTi,serif;font-size:30px;margin:2px 0}.audio-guide-card p,.learning-guide-card p{margin:0;color:#5e7077}.guide-kicker{color:#a85d3b;font-size:12px;font-weight:800;letter-spacing:.12em}.guide-mark{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#173743;color:#efc66f;font-weight:900;font-size:22px}.learning-guide-card{grid-template-columns:auto 1fr auto}
.audio-detail-card{display:grid;grid-template-columns:.75fr 1.25fr;gap:18px;align-items:center;margin-top:24px;padding:18px;border-radius:22px;background:#fffaf0;border:1px solid rgba(16,47,59,.15)}.audio-detail-copy strong{display:block;font-family:STKaiti,KaiTi,serif;font-size:24px}.audio-detail-copy p{color:#65747a}.audio-detail-card .lesson-card-figure{margin:0}.compact-audio{margin-top:6px}
.closing-audio-section{padding:24px 0 54px;background:#eadfc8}.closing-audio-card{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:28px;border-radius:24px;background:linear-gradient(135deg,#102f3b,#1d4b55);color:#fff}.closing-audio-card h2{font-family:STKaiti,KaiTi,serif;font-size:34px;margin:3px 0}.closing-audio-card p{margin:0;color:#d7e3e4}.closing-audio{flex:0 0 auto;border-color:rgba(255,255,255,.35);background:rgba(255,255,255,.09);color:#fff}
@media(max-width:900px){.header-actions nav{display:none}.sound-toggle-label{display:none}.audio-guide-card,.learning-guide-card{grid-template-columns:1fr}.guide-mark{display:none}.guide-audio{justify-self:start}.audio-detail-card{grid-template-columns:1fr}.closing-audio-card{align-items:stretch;flex-direction:column}.closing-audio{align-self:flex-start}}
@media(max-width:560px){.sound-toggle{padding:7px 9px}.audio-actions,.hero-audio-actions{flex-direction:column;align-items:stretch}.audio-actions .audio-button,.hero-audio-actions .audio-button{width:100%}.audio-guide-card,.learning-guide-card{padding:20px}.audio-guide-card h2,.learning-guide-card h2{font-size:26px}.section-audio{width:100%}.closing-audio-card h2{font-size:28px}}