/* =========================================================
   青铜宇宙 · The Bronze Cosmos
   设计系统：深海 / 铜绿 / 旧金
   零外链 · 全系统字体 · file:// 可直接运行
   ========================================================= */

:root{
  --abyss:#070a0b;
  --sea:#0e1a1c;
  --sea-2:#122325;
  --patina:#4e7f6c;
  --patina-lit:#7fb39b;
  --gold:#c9a227;
  --gold-lit:#e8c86a;
  --parchment:#e9e1ce;
  --rust:#9c4a2f;
  --mist:#8a9691;
  --line:rgba(201,162,39,.22);
  --line-soft:rgba(201,162,39,.10);

  --serif:Georgia,"Times New Roman","Songti SC",SimSun,serif;
  --sans:"Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  --mono:Consolas,"SFMono-Regular",Menlo,monospace;

  --ease:cubic-bezier(.2,.8,.2,1);
  --pad:clamp(22px,6vw,104px);
  --rail:232px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

body{
  margin:0;
  background:var(--abyss);
  color:var(--parchment);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 底噪与暗角 */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(1200px 700px at 70% -10%,rgba(78,127,108,.13),transparent 60%),
    radial-gradient(900px 600px at 10% 110%,rgba(201,162,39,.06),transparent 60%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.05;
  background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.5) 0 1px,transparent 1px 3px);
  mix-blend-mode:overlay;
}

::selection{background:var(--gold);color:#0a0c0c}

a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}

/* ================= 侧栏 ================= */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:40;
  display:flex;flex-direction:column;gap:28px;
  padding:34px 26px 28px;
  border-right:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(7,10,11,.96),rgba(7,10,11,.86));
  backdrop-filter:blur(10px);
}
.rail-brand{display:flex;align-items:center;gap:12px}
.rail-brand svg{width:34px;height:34px;color:var(--gold);flex:none;animation:spin 90s linear infinite}
.rail-brand-text{display:flex;flex-direction:column;font-family:var(--serif);font-size:17px;letter-spacing:.08em;line-height:1.3}
.rail-brand-text em{font-family:var(--mono);font-style:normal;font-size:8.5px;letter-spacing:.16em;color:var(--mist);margin-top:4px}

.rail-list{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-direction:column;gap:2px}
.rail-list a{
  display:flex;align-items:baseline;gap:12px;
  padding:9px 10px;border-radius:2px;
  color:var(--mist);transition:color .3s var(--ease),background .3s var(--ease);
}
.rail-list b{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--patina)}
.rail-list span{font-size:14.5px;letter-spacing:.14em}
.rail-list a:hover,.rail-list a:focus-visible{color:var(--parchment);background:rgba(201,162,39,.06);outline:none}
.rail-list a.active{color:var(--gold-lit)}
.rail-list a.active b{color:var(--gold)}

.rail-src{
  margin-top:auto;background:none;border:1px solid var(--line);
  padding:10px 12px;border-radius:2px;cursor:pointer;
  font-size:12px;letter-spacing:.18em;color:var(--parchment);
  display:flex;justify-content:space-between;align-items:center;
  transition:border-color .3s,color .3s;
}
.rail-src span{font-family:var(--mono);color:var(--gold)}
.rail-src:hover{border-color:var(--gold);color:var(--gold-lit)}

/* 顶部进度 */
.progress{position:fixed;top:0;left:var(--rail);right:0;height:2px;z-index:45;background:rgba(255,255,255,.04)}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--patina),var(--gold));transition:width .15s linear}

main{position:relative;z-index:2;margin-left:var(--rail)}

/* ================= 首页 ================= */
.hero{
  position:relative;min-height:100svh;display:flex;align-items:center;
  padding:120px var(--pad) 90px;overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.hero-gears{position:absolute;inset:-10% -20% 0 -10%;opacity:.5;pointer-events:none}
.hero-gears svg{width:100%;height:100%}
.hero-inner{position:relative;max-width:820px}
.hero-kicker{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.34em;
  color:var(--patina-lit);text-transform:uppercase;margin:0 0 26px;
}
.hero-title{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(64px,11vw,148px);line-height:.92;letter-spacing:.04em;
  margin:0 0 26px;color:var(--parchment);
}
.hero-title span{color:var(--gold);display:inline-block;transform:translateX(.06em)}
.hero-sub{
  font-family:var(--serif);font-size:clamp(19px,2.1vw,26px);
  color:var(--gold-lit);letter-spacing:.06em;margin:0 0 26px;
}
.hero-desc{max-width:56ch;color:#c9c2b2;font-size:15.5px;line-height:1.95;margin:0 0 40px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:64px}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;border-radius:2px;cursor:pointer;
  font-size:13.5px;letter-spacing:.16em;border:1px solid transparent;
  transition:background .35s var(--ease),color .35s var(--ease),border-color .35s var(--ease),transform .35s var(--ease);
}
.btn span{transition:transform .35s var(--ease)}
.btn-primary{background:var(--gold);color:#0b0d0d;font-weight:600}
.btn-primary:hover{background:var(--gold-lit);transform:translateY(-1px)}
.btn-primary:hover span{transform:translateX(4px)}
.btn-ghost{border-color:var(--line);color:var(--parchment);background:transparent}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-lit)}

.hero-stats{display:flex;gap:clamp(22px,4vw,60px);margin:0;flex-wrap:wrap}
.hero-stats div{border-left:1px solid var(--line);padding-left:16px}
.hero-stats dt{font-family:var(--serif);font-size:30px;color:var(--gold);line-height:1}
.hero-stats dd{margin:8px 0 0;font-size:11px;letter-spacing:.16em;color:var(--mist)}

.hero-scroll{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-family:var(--mono);font-size:9px;letter-spacing:.3em;color:var(--mist);
}
.hero-scroll i{width:1px;height:46px;background:linear-gradient(180deg,var(--gold),transparent);animation:drop 2.4s var(--ease) infinite}

/* ================= 展区通用 ================= */
.zone{
  position:relative;scroll-margin-top:26px;
  padding:clamp(70px,10vh,130px) var(--pad);
  border-bottom:1px solid var(--line-soft);
}
.zone-alt{background:linear-gradient(180deg,rgba(14,26,28,.55),rgba(7,10,11,0))}

.zone-head{max-width:900px;margin-bottom:clamp(40px,6vh,72px)}
.zone-no{
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--gold);
  margin:0 0 6px;
}
.zone-en{
  font-family:var(--mono);font-size:10px;letter-spacing:.42em;color:var(--patina);
  text-transform:uppercase;margin:0 0 18px;
}
.zone-title{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(46px,6.4vw,84px);line-height:1;letter-spacing:.06em;
  margin:0 0 26px;
}
.lede{
  font-family:var(--serif);font-size:clamp(18px,1.9vw,23px);
  line-height:1.8;color:#d8d0bd;margin:0;max-width:40ch;
}

.zone-body{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(36px,5vw,80px);align-items:start}
.prose p{margin:0 0 22px;max-width:62ch;color:#cdc6b6;font-size:16px;line-height:1.95}
.prose p:last-child{margin-bottom:0}
.prose b{color:var(--gold-lit);font-weight:600}

/* 卡片 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.kcard{
  position:relative;padding:20px 20px 16px;
  background:linear-gradient(160deg,rgba(24,45,46,.82),rgba(10,16,17,.82));
  border:1px solid var(--line-soft);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.02),0 18px 40px -30px #000;
  transition:border-color .4s var(--ease),transform .4s var(--ease),background .4s var(--ease);
}
.kcard::before{
  content:"";position:absolute;left:0;top:0;width:1px;height:0;
  background:linear-gradient(180deg,var(--gold),transparent);
  transition:height .5s var(--ease);
}
.kcard:hover{border-color:var(--line);transform:translateY(-3px);background:linear-gradient(160deg,rgba(30,55,56,.9),rgba(10,16,17,.9))}
.kcard:hover::before{height:100%}
.kcard-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.kcard-id{font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;color:var(--mist)}
.kcard h3{font-family:var(--serif);font-weight:400;font-size:17.5px;line-height:1.45;margin:0 0 10px;letter-spacing:.02em}
.kcard p{margin:0 0 14px;font-size:13.5px;line-height:1.8;color:#b6b0a1}
.kcard-src{display:flex;gap:6px;flex-wrap:wrap}
.kcard-src button{
  background:none;border:1px solid var(--line-soft);color:var(--mist);
  font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;
  padding:3px 7px;cursor:pointer;transition:all .3s var(--ease);
}
.kcard-src button:hover{border-color:var(--gold);color:var(--gold-lit)}

/* 徽标 */
.badge{
  display:inline-block;font-size:9.5px;letter-spacing:.16em;
  padding:3px 8px;border:1px solid;border-radius:1px;line-height:1.4;
}
.badge-a{color:var(--patina-lit);border-color:rgba(127,179,155,.45);background:rgba(78,127,108,.12)}
.badge-b{color:var(--gold-lit);border-color:rgba(201,162,39,.45);background:rgba(201,162,39,.1)}
.badge-c{color:#d98a6d;border-color:rgba(156,74,47,.55);background:rgba(156,74,47,.14)}
.badge-d{color:#9aa5a0;border-color:rgba(138,150,145,.35);background:rgba(138,150,145,.08)}
.badge-e{color:#e9e1ce;border-color:rgba(233,225,206,.4);background:transparent}

/* 引语 */
.zone-quote{
  font-family:var(--serif);font-size:clamp(20px,2.6vw,30px);line-height:1.6;
  color:var(--gold-lit);max-width:26ch;margin:64px 0 0;padding-left:24px;
  border-left:1px solid var(--gold);
}
.zone-quote-src{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--mist);margin:14px 0 0 25px}

/* 下一展区 */
.zone-next{
  display:flex;align-items:center;gap:16px;margin-top:clamp(52px,7vh,88px);
  padding-top:22px;border-top:1px solid var(--line-soft);
  transition:color .35s var(--ease);
}
.zone-next span{font-family:var(--mono);font-size:9.5px;letter-spacing:.26em;color:var(--mist)}
.zone-next b{font-family:var(--serif);font-weight:400;font-size:16px;letter-spacing:.06em}
.zone-next i{margin-left:auto;font-style:normal;color:var(--gold);transition:transform .4s var(--ease)}
.zone-next:hover{color:var(--gold-lit)}
.zone-next:hover i{transform:translateX(8px)}

/* ================= 交互台 ================= */
.stage{
  margin-top:clamp(46px,6vh,76px);
  border:1px solid var(--line-soft);
  background:linear-gradient(160deg,rgba(14,26,28,.6),rgba(7,10,11,.9));
  padding:clamp(18px,2.6vw,34px);
}
.stage-wide{margin-top:26px}
.stage-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;flex-wrap:wrap;margin-bottom:10px}
.stage-label{font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;color:var(--gold);margin:0}
.stage-hint{font-size:12px;color:var(--mist);margin:0}
.stage-canvas{position:relative;width:100%;margin:6px 0 4px}
.stage-canvas svg{width:100%;height:auto;display:block}
.stage-canvas-round{max-width:700px;margin-inline:auto}
.stage-canvas-graph svg{max-height:520px}
.stage-foot{margin-top:14px;display:flex;flex-direction:column;gap:12px}
.stage-note{font-size:11.5px;color:var(--mist);margin:0;line-height:1.7}

.slider-label{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--mist)}
.slider-label output{color:var(--gold-lit)}

input[type=range]{
  -webkit-appearance:none;appearance:none;width:100%;height:2px;
  background:linear-gradient(90deg,var(--patina),rgba(201,162,39,.35));
  outline:none;cursor:pointer;margin:4px 0;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:16px;height:16px;border-radius:50%;
  background:var(--gold);border:2px solid #0b0d0d;
  box-shadow:0 0 0 3px rgba(201,162,39,.18),0 0 18px rgba(201,162,39,.5);
}
input[type=range]::-moz-range-thumb{
  width:14px;height:14px;border-radius:50%;background:var(--gold);
  border:2px solid #0b0d0d;box-shadow:0 0 0 3px rgba(201,162,39,.18);
}
input[type=range]:focus-visible{box-shadow:0 0 0 6px rgba(201,162,39,.12)}

.readout{display:flex;gap:14px;align-items:baseline;flex-wrap:wrap;padding:10px 14px;border-left:1px solid var(--gold);background:rgba(201,162,39,.04)}
.readout b{font-family:var(--serif);font-weight:400;font-size:15px;color:var(--gold-lit);letter-spacing:.04em;white-space:nowrap}
.readout span{font-size:12.5px;color:#b6b0a1;line-height:1.7}

/* 齿轮 */
#gearSvg .gear{cursor:pointer;transition:opacity .3s}
#gearSvg .gear.dim{opacity:.35}
#gearSvg text{font-family:var(--mono);paint-order:stroke;stroke:#0a0d0d;stroke-width:3px;stroke-linejoin:round}

/* 残片墙 */
.fragwall{
  display:grid;grid-template-columns:repeat(14,1fr);gap:6px;
  margin:16px 0 6px;
}
.frag{
  padding:0;border:none;background:none;cursor:pointer;
  aspect-ratio:1;display:block;transition:transform .3s var(--ease);
}
.frag svg{width:100%;height:100%;display:block}
.frag polygon{
  fill:rgba(78,127,108,.10);stroke:rgba(127,179,155,.32);stroke-width:1;
  transition:fill .3s var(--ease),stroke .3s var(--ease);
}
.frag:hover polygon{fill:rgba(201,162,39,.14);stroke:rgba(232,200,106,.85)}
.frag:focus-visible{outline:1px solid var(--gold);outline-offset:2px}
.frag-main{grid-column:span 2;grid-row:span 2}
.frag-main polygon{fill:rgba(201,162,39,.08);stroke:rgba(201,162,39,.6);stroke-width:1.2}
.frag-main:hover polygon{fill:rgba(201,162,39,.2);stroke:#e8c86a}
.frag-main text{pointer-events:none}

@media (max-width:900px){.fragwall{grid-template-columns:repeat(9,1fr);gap:4px}}
@media (max-width:520px){.fragwall{grid-template-columns:repeat(7,1fr);gap:3px}}

/* 周期尺 */
#cycleRuler .cycle-row rect{transition:filter .3s var(--ease)}
#cycleRuler .cycle-row:hover rect{filter:brightness(1.25)}

/* 方法对照 */
.methods{margin-top:clamp(44px,6vh,72px);padding-top:26px;border-top:1px solid var(--line-soft)}
.method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 0 16px}
.method{
  padding:18px 18px 14px;border:1px solid var(--line-soft);
  background:linear-gradient(160deg,rgba(20,38,40,.55),rgba(9,14,15,.7));
  transition:border-color .35s var(--ease),transform .35s var(--ease);
}
.method:hover{border-color:var(--line);transform:translateY(-2px)}
.method-year{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--gold);margin:0 0 8px}
.method h3{font-family:var(--serif);font-weight:400;font-size:16px;line-height:1.45;margin:0 0 10px}
.method p{margin:0 0 10px;font-size:12.5px;line-height:1.8;color:#b0aa9b}
.method-src{font-family:var(--mono);font-size:9px;letter-spacing:.12em;color:var(--mist);margin:0}
.methods-note{font-size:12.5px;color:var(--mist);line-height:1.8;margin:0;max-width:70ch}

@media (max-width:1180px){.method-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.method-grid{grid-template-columns:1fr}}

/* 齿数比计算器 */
.ratio-wrap{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(240px,.9fr);gap:24px;align-items:center;margin-top:6px}
.ratio-controls{display:flex;flex-direction:column;gap:10px}
.ratio-row{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--mist)}
.ratio-row output{color:var(--gold-lit)}
#ratioInfo{margin-top:4px}

@media (max-width:900px){
  .ratio-wrap{grid-template-columns:1fr;gap:14px}
}

/* 三维宇宙盘 */
.orrery3d-wrap{
  position:relative;width:100%;aspect-ratio:16/10;max-height:620px;
  margin:10px 0 4px;
}
.orrery3d-wrap canvas{width:100%;height:100%;display:block;touch-action:none;cursor:grab}
.orrery3d-wrap canvas.dragging{cursor:grabbing}
.orrery3d-wrap canvas:focus-visible{outline:1px solid var(--gold);outline-offset:2px}
.orrery3d-foot{flex-direction:row;align-items:center;gap:16px;flex-wrap:wrap}
.btn-sm{padding:8px 14px;font-size:12px;letter-spacing:.1em}

/* 2D / 3D 切换 */
.cosmos-stage .stage-head{align-items:flex-start;gap:16px}
.view-toggle{display:flex;flex:none;border:1px solid var(--line-soft);border-radius:2px;overflow:hidden}
.view-toggle button{
  background:none;border:none;color:var(--mist);cursor:pointer;
  font-size:11px;letter-spacing:.14em;padding:7px 14px;
  transition:background .25s var(--ease),color .25s var(--ease);
}
.view-toggle button+button{border-left:1px solid var(--line-soft)}
.view-toggle button:hover{color:var(--parchment)}
.view-toggle button.on{background:rgba(201,162,39,.14);color:var(--gold-lit)}
.view[hidden]{display:none}

@media (max-width:720px){
  .orrery3d-wrap{aspect-ratio:1/1;max-height:380px}
  .view-toggle button{padding:6px 10px;font-size:10.5px}
}

/* 时间轴 */
.timeline{position:relative;padding:34px 0 10px}
.timeline-track{position:relative;height:1px;background:rgba(201,162,39,.18)}
.timeline-track i{position:absolute;left:0;top:0;height:1px;width:0;background:linear-gradient(90deg,var(--patina),var(--gold));transition:width .3s var(--ease)}
.timeline-ticks{position:relative;height:46px;margin-top:-23px}
.timeline-ticks button{
  position:absolute;top:23px;transform:translate(-50%,-50%);
  width:9px;height:9px;padding:0;border-radius:50%;cursor:pointer;
  background:#0a0d0d;border:1px solid var(--patina);
  transition:all .3s var(--ease);
}
.timeline-ticks button:hover,.timeline-ticks button.on{background:var(--gold);border-color:var(--gold);box-shadow:0 0 0 4px rgba(201,162,39,.14)}
.timeline-ticks span{
  position:absolute;top:38px;transform:translateX(-50%);
  font-family:var(--mono);font-size:9px;color:var(--mist);letter-spacing:.06em;
}
.timeline-card{
  min-height:112px;margin-top:18px;padding:20px 22px;
  border:1px solid var(--line-soft);border-left:2px solid var(--gold);
  background:rgba(18,35,37,.5);
}
.timeline-card h4{margin:0 0 8px;font-family:var(--serif);font-weight:400;font-size:18px;letter-spacing:.03em}
.timeline-card h4 em{font-style:normal;font-family:var(--mono);font-size:10px;color:var(--gold);letter-spacing:.14em;margin-right:10px}
.timeline-card p{margin:0;font-size:13.5px;line-height:1.85;color:#b6b0a1;max-width:70ch}
.inline-src{background:none;border:none;border-bottom:1px solid var(--line);color:var(--patina-lit);font-family:var(--mono);font-size:10px;letter-spacing:.08em;padding:0 0 1px;cursor:pointer}
.inline-src:hover{color:var(--gold-lit);border-color:var(--gold)}

/* 关系图 */
#knowledgeGraph text{font-family:var(--sans);pointer-events:none}
#knowledgeGraph .node{cursor:pointer}
#knowledgeGraph .node circle{transition:all .3s var(--ease)}
#knowledgeGraph .node:hover circle{stroke-width:2.5}

/* 证据图例 */
.evidence-legend{margin-top:clamp(40px,5vh,64px);padding-top:26px;border-top:1px solid var(--line-soft)}
.legend-title{font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;color:var(--gold);margin:0 0 16px}
.evidence-legend ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px 26px}
.evidence-legend li{font-size:12.5px;color:#a9a394;line-height:1.7;display:flex;gap:10px;align-items:baseline}

/* ================= 尾厅 ================= */
.outro{padding:clamp(80px,12vh,150px) var(--pad);text-align:center;border-top:1px solid var(--line-soft);background:radial-gradient(700px 380px at 50% 0%,rgba(78,127,108,.10),transparent 70%)}
.outro-kicker{font-family:var(--mono);font-size:10px;letter-spacing:.4em;color:var(--gold);margin:0 0 26px}
.outro h2{font-family:var(--serif);font-weight:400;font-size:clamp(26px,3.8vw,48px);line-height:1.45;letter-spacing:.04em;margin:0 auto 30px;max-width:22ch}
.outro-text{max-width:62ch;margin:0 auto 40px;font-size:14.5px;line-height:1.95;color:#b6b0a1}
.outro-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:44px}
.outro-meta{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;color:var(--mist);margin:0}

/* ================= 抽屉 ================= */
.drawer{
  width:min(760px,92vw);max-height:86vh;padding:0;
  background:#0c1415;color:var(--parchment);
  border:1px solid var(--line);border-radius:2px;
  box-shadow:0 40px 120px -40px #000;
}
.drawer::backdrop{background:rgba(3,5,5,.78);backdrop-filter:blur(6px)}
.drawer[open]{animation:slideIn .45s var(--ease)}
.drawer-head{display:flex;justify-content:space-between;align-items:center;padding:22px 26px;border-bottom:1px solid var(--line-soft);position:sticky;top:0;background:#0c1415;z-index:2}
.drawer-head h2{font-family:var(--serif);font-weight:400;font-size:22px;letter-spacing:.06em;margin:0}
.drawer-close{background:none;border:1px solid var(--line-soft);width:34px;height:34px;cursor:pointer;color:var(--mist);transition:all .3s}
.drawer-close:hover{border-color:var(--gold);color:var(--gold-lit)}
.drawer-note{margin:18px 26px 0;font-size:12px;color:var(--mist);line-height:1.7}
.drawer-body{padding:16px 26px 30px;overflow:auto;max-height:calc(86vh - 130px)}
.about-body p{font-size:14px;line-height:1.95;color:#c3bcac;margin:0 0 16px}
.about-body b{color:var(--gold-lit);font-weight:600}

.src-item{padding:18px 0;border-bottom:1px solid var(--line-soft)}
.src-item:last-child{border-bottom:none}
.src-head{display:flex;gap:12px;align-items:baseline;margin-bottom:8px}
.src-id{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--gold);flex:none}
.src-item h3{margin:0;font-family:var(--serif);font-weight:400;font-size:15.5px;letter-spacing:.02em;line-height:1.5}
.src-item p{margin:0 0 8px;font-size:12.5px;line-height:1.8;color:#a9a394}
.src-item a{font-family:var(--mono);font-size:10.5px;color:var(--patina-lit);word-break:break-all;border-bottom:1px solid rgba(127,179,155,.3)}
.src-item a:hover{color:var(--gold-lit);border-color:var(--gold)}
.src-tag{display:inline-block;font-family:var(--mono);font-size:9px;letter-spacing:.1em;color:var(--mist);border:1px solid var(--line-soft);padding:2px 6px;margin-left:8px}

/* ================= 动效 ================= */
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
@keyframes slideIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ================= 响应式 ================= */
@media (max-width:1180px){
  :root{--rail:0px}
  .rail{
    top:auto;right:0;bottom:0;width:100%;height:auto;flex-direction:row;align-items:center;
    gap:8px;padding:10px 14px;border-right:none;border-top:1px solid var(--line-soft);
    background:rgba(7,10,11,.94);
  }
  .rail-brand-text,.rail-src span{display:none}
  .rail-brand svg{width:26px;height:26px}
  .rail-list{flex-direction:row;overflow-x:auto;margin:0;gap:2px;flex:1;scrollbar-width:none}
  .rail-list::-webkit-scrollbar{display:none}
  .rail-list a{padding:8px 10px;white-space:nowrap}
  .rail-list span{font-size:12.5px;letter-spacing:.1em}
  .rail-src{margin:0;padding:7px 10px;font-size:11px}
  .rail-tools{flex-direction:row;margin:0;gap:6px}
  .rail-tools .rail-src span{display:none}
  .progress{left:0}
  main{margin-left:0;padding-bottom:64px}
  .zone-body{grid-template-columns:1fr}
  .hero{padding:100px var(--pad) 90px}
}

@media (max-width:720px){
  body{font-size:16px}
  .hero-title{font-size:clamp(56px,18vw,90px)}
  .hero-stats{gap:18px}
  .hero-stats dt{font-size:24px}
  .zone-quote{font-size:19px;max-width:none}
  .cards{grid-template-columns:1fr}
  .stage{padding:16px}
  .timeline-card{padding:16px}
  .outro h2{max-width:none}
  .drawer{width:96vw;max-height:90vh}
  .hero-scroll{display:none}
}

@media (max-width:420px){
  .rail-list span{display:none}
  .rail-list a{padding:8px 12px}
  .rail-list b{font-size:11px}
}

@media (max-height:820px){
  .hero-scroll{display:none}
}

/* ================= 检索 ================= */
.skip-link{
  position:fixed;left:12px;top:-70px;z-index:120;
  background:var(--gold);color:#0b0d0d;padding:10px 16px;
  font-size:13px;letter-spacing:.1em;transition:top .25s var(--ease);
}
.skip-link:focus{top:12px}

.rail-tools{margin-top:auto;display:flex;flex-direction:column;gap:8px}
.rail-tools .rail-src{margin-top:0}

.search-drawer{width:min(720px,94vw)}
.search-bar{display:flex;gap:10px;padding:18px 26px 0}
.search-bar input{
  flex:1;min-width:0;background:rgba(255,255,255,.03);
  border:1px solid var(--line);color:var(--parchment);
  padding:12px 14px;font:inherit;font-size:14px;letter-spacing:.04em;border-radius:2px;
}
.search-bar input::placeholder{color:#6f7d78}
.search-bar input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}
.search-bar input:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,162,39,.12)}
.search-random{
  background:none;border:1px solid var(--line);color:var(--mist);
  padding:0 14px;font-size:12px;letter-spacing:.12em;cursor:pointer;white-space:nowrap;
  transition:all .3s var(--ease);
}
.search-random:hover{border-color:var(--gold);color:var(--gold-lit)}

.filter-chips{display:flex;gap:6px;flex-wrap:wrap;padding:14px 26px 4px}
.filter-chips button{
  background:none;border:1px solid var(--line-soft);color:var(--mist);
  font-size:11px;letter-spacing:.12em;padding:5px 10px;cursor:pointer;
  transition:all .25s var(--ease);
}
.filter-chips button:hover{color:var(--parchment);border-color:var(--line)}
.filter-chips button.on{border-color:var(--gold);color:var(--gold-lit);background:rgba(201,162,39,.08)}

.search-meta{margin:10px 26px 6px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--mist)}
.search-hint{margin:0 26px 2px;font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;color:#6f7d78}
mark{background:rgba(201,162,39,.22);color:var(--gold-lit);padding:0 1px;border-radius:1px}
.search-results{padding:0 26px 24px;overflow:auto;max-height:min(50vh,440px)}
.result{
  display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;
  gap:3px 12px;width:100%;text-align:left;background:none;border:none;
  border-bottom:1px solid var(--line-soft);padding:12px 8px;cursor:pointer;
  transition:background .2s var(--ease);
}
.result:hover,.result.active{background:rgba(201,162,39,.06)}
.result:focus-visible{outline:1px solid var(--gold);outline-offset:-1px}
.r-grade{
  grid-row:1/3;align-self:center;font-size:9.5px;letter-spacing:.1em;
  padding:3px 7px;border:1px solid;white-space:nowrap;justify-self:start;
}
.g-A{color:var(--patina-lit);border-color:rgba(127,179,155,.45)}
.g-B{color:var(--gold-lit);border-color:rgba(201,162,39,.45)}
.g-C{color:#d98a6d;border-color:rgba(156,74,47,.55)}
.g-D{color:#9aa5a0;border-color:rgba(138,150,145,.35)}
.g-E{color:#e9e1ce;border-color:rgba(233,225,206,.4)}
.g-P{color:#a9b8b1;border-color:rgba(169,184,177,.32)}
.r-title{font-family:var(--serif);font-size:15px;color:var(--parchment);line-height:1.4}
.r-zone{font-family:var(--mono);font-size:9.5px;color:var(--mist);letter-spacing:.08em}
.r-empty{font-size:13px;color:var(--mist);padding:20px 8px;margin:0;line-height:1.8}

.kcard.flash{animation:flash 2.2s var(--ease)}
.kcard.tour-focus{box-shadow:0 0 0 1px var(--gold),0 0 34px rgba(201,162,39,.18);border-color:rgba(201,162,39,.45)}
@keyframes flash{
  0%,100%{box-shadow:inset 0 0 0 1px rgba(255,255,255,.02),0 18px 40px -30px #000}
  12%,55%{box-shadow:0 0 0 1px var(--gold),0 0 44px rgba(201,162,39,.28)}
}

.prose p.flash-p,.lede.flash-p{animation:flashP 2.2s var(--ease)}
@keyframes flashP{
  0%,100%{background:transparent;box-shadow:none}
  12%,55%{background:rgba(201,162,39,.10);box-shadow:inset 3px 0 0 var(--gold)}
}

@media (max-width:1180px){
  .rail .rail-tools{flex-direction:row;margin:0;gap:6px}
  .rail .rail-tools .rail-src span{display:none}
}

/* ================= 导览 ================= */
.tour{
  position:fixed;right:clamp(16px,3vw,40px);bottom:96px;z-index:60;
  width:min(360px,calc(100vw - 32px));
  padding:20px 22px 16px;
  background:rgba(10,18,19,.96);
  border:1px solid var(--line);
  box-shadow:0 30px 80px -30px #000,inset 0 0 0 1px rgba(255,255,255,.03);
  backdrop-filter:blur(12px);
  animation:slideIn .4s var(--ease);
}
.tour[hidden]{display:none}
.tour-step{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;
  color:var(--gold);margin:0 0 8px;
}
.tour-title{
  font-family:var(--serif);font-weight:400;font-size:21px;letter-spacing:.06em;
  margin:0 0 8px;color:var(--parchment);
}
.tour-text{margin:0 0 10px;font-size:13px;line-height:1.85;color:#b6b0a1}
.tour-links{display:flex;gap:8px;margin:0 0 14px}
.tour-link{
  background:none;border:none;padding:0 0 2px;cursor:pointer;
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;
  color:var(--patina-lit);border-bottom:1px solid rgba(127,179,155,.35);
  transition:color .25s var(--ease),border-color .25s var(--ease);
}
.tour-link:hover{color:var(--gold-lit);border-color:var(--gold)}
.tour-link[disabled]{opacity:.4;cursor:default}
.tour-actions{display:flex;align-items:center;gap:8px}
.tour-btn{
  background:none;border:1px solid var(--line-soft);color:var(--mist);
  font-size:11.5px;letter-spacing:.12em;padding:7px 12px;cursor:pointer;
  transition:all .25s var(--ease);
}
.tour-btn:hover{border-color:var(--gold);color:var(--gold-lit)}
.tour-next{margin-left:auto;border-color:rgba(201,162,39,.5);color:var(--gold-lit)}
.tour-next:hover{background:rgba(201,162,39,.1)}
.tour-btn[disabled]{opacity:.35;cursor:default;border-color:var(--line-soft);color:var(--mist)}
.tour-exit{
  position:absolute;top:12px;right:12px;
  background:none;border:1px solid var(--line-soft);
  width:26px;height:26px;cursor:pointer;color:var(--mist);font-size:11px;
}
.tour-exit:hover{border-color:var(--gold);color:var(--gold-lit)}
body.tour-open .tour{pointer-events:auto}

@media (max-width:720px){
  .tour{left:12px;right:12px;bottom:76px;width:auto;padding:18px 18px 14px}
}

/* ================= 声音开关 ================= */
.sound-toggle span{margin-left:6px}
.sound-toggle.on{border-color:rgba(127,179,155,.55);color:var(--patina-lit)}
.sound-toggle.on span{color:var(--patina-lit)}
.sound-toggle .wave{display:inline-block;width:10px;height:10px;border-radius:50%;background:currentColor;opacity:0;margin-right:2px}
.sound-toggle.on .wave{opacity:1;animation:pulse 2.4s var(--ease) infinite}
@keyframes pulse{0%,100%{transform:scale(.7);opacity:.35}50%{transform:scale(1);opacity:1}}

/* ================= 声音分层 ================= */
.sound-group{display:flex;gap:6px}
.sound-mix{flex:0 0 34px;justify-content:center;padding:10px 0;font-size:14px;letter-spacing:0}
.mixer{
  position:fixed;left:calc(var(--rail) + 14px);bottom:92px;z-index:60;
  width:min(300px,calc(100vw - 32px));
  padding:16px 18px 14px;
  background:rgba(10,18,19,.97);
  border:1px solid var(--line);
  box-shadow:0 30px 80px -30px #000;
  backdrop-filter:blur(12px);
  animation:slideIn .35s var(--ease);
}
.mixer[hidden]{display:none}
.mixer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.mixer-head h3{font-family:var(--serif);font-weight:400;font-size:16px;letter-spacing:.08em;margin:0}
.mixer-head .tour-exit{position:static;width:24px;height:24px}
.mixer-note{font-size:11px;line-height:1.7;color:var(--mist);margin:0 0 12px}
.mix-row{display:flex;justify-content:space-between;font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;color:var(--mist);margin-bottom:2px}
.mix-row output{color:var(--gold-lit)}
.mixer input[type=range]{margin-bottom:12px}

@media (max-width:1180px){
  .mixer{left:12px;right:12px;bottom:76px;width:auto}
  .sound-mix{flex:0 0 30px;padding:7px 0}
}

/* ================= 打印：图录模式 ================= */
@media print{
  :root{
    --abyss:#ffffff;--parchment:#141414;--mist:#5a5a5a;
    --line:rgba(0,0,0,.35);--line-soft:rgba(0,0,0,.16);
    --gold:#7a5c00;--gold-lit:#5a4400;--patina:#2f5c4c;--patina-lit:#2f5c4c;
  }
  body{background:#fff;color:#141414;font-size:11pt}
  body::before,body::after{display:none}
  .rail,.progress,.hero-scroll,.stage,.zone-next,.outro-actions,.fragwall,.methods-note,.tour{display:none!important}
  main{margin:0}
  .hero{min-height:auto;padding:10pt 10pt 18pt;border-bottom:1px solid #ddd}
  .zone-alt,.outro{background:none}
  .hero-gears{display:none}
  .hero-title{font-size:44pt;color:#111}
  .hero-title span{color:#7a5c00}
  .hero-sub,.hero-desc,.lede,.prose p,.kcard p{color:#222}
  .hero-actions{display:none}
  .hero-stats dt{color:#7a5c00}
  .zone{padding:18pt 10pt;page-break-inside:avoid;border-bottom:1px solid #ddd}
  .zone-body{grid-template-columns:1fr;gap:10pt}
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .prose p,.lede,.hero-desc{max-width:none}
  .zone-head{margin-bottom:12pt}
  .zone-title{color:#111;font-size:26pt}
  .zone-no,.zone-en{color:#666}
  .kcard{background:#fff;border:1px solid #bbb;break-inside:avoid}
  .badge{border-color:#888;color:#333;background:none}
  .zone-quote{color:#333;border-left-color:#888}
  .evidence-legend,.methods{border-color:#ddd}
  .method{background:#fff;border-color:#ccc}
  .outro{padding:24pt 0}
  a{color:#141414}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:8pt;color:#666;word-break:break-all}
}