/* ============ 基础与变量 ============ */
:root{
  --navy:#0b1026;
  --navy-2:#111838;
  --ink:#1c2333;
  --ink-soft:#39435a;
  --gold:#c9a44c;
  --gold-soft:#e6d39a;
  --paper:#f7f5ef;
  --line:#e4e0d6;
  --pro:#2f6d53;
  --pro-bg:#eef6f1;
  --con:#9b4838;
  --con-bg:#f9efec;
  --radius:14px;
  --shadow:0 10px 30px rgba(11,16,38,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overscroll-behavior:none}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,SimSun,serif;
  font-weight:700;
  line-height:1.35;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}

/* ============ 导航（统一头部组件） ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:64px;padding:0 4%;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(11,16,38,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(201,164,76,.25);
}
.nav-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;letter-spacing:2px}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border:1.5px solid var(--gold);border-radius:50%;
  color:var(--gold);font-family:"Noto Serif SC",serif;font-size:19px;
}
.nav-logo-img{width:32px;height:32px;display:block;flex-shrink:0}
.nav-links{display:flex;gap:30px}
.nav-links a{color:rgba(255,255,255,.92);font-size:15px;transition:color .2s;white-space:nowrap}
.nav-links a:hover{color:var(--gold-soft)}
.nav-links a.active{color:var(--gold);font-weight:600}
.nav-burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:9px;flex:none;
  background:transparent;border:1px solid rgba(201,164,76,.4);border-radius:10px;cursor:pointer;
}
.nav-burger span{display:block;height:2px;width:100%;background:var(--gold-soft);border-radius:2px;transition:transform .25s,opacity .25s}
.nav.menu-open .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.menu-open .nav-burger span:nth-child(2){opacity:0}
.nav.menu-open .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 平板：收紧间距 */
@media (max-width:1120px){
  .nav{padding:0 20px}
  .nav-links{gap:18px}
  .nav-links a{font-size:13.5px}
}
/* 手机：汉堡菜单 */
@media (max-width:880px){
  .nav-burger{display:flex}
  .nav-links{
    position:absolute;top:64px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(11,16,38,.97);backdrop-filter:blur(12px);
    border-bottom:1px solid rgba(201,164,76,.3);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .nav.menu-open .nav-links{max-height:360px}
  .nav-links a{padding:15px 6%;font-size:15px;border-top:1px solid rgba(255,255,255,.06)}
  .nav-links a.active{background:rgba(201,164,76,.12)}
}
@media (max-width:480px){
  .nav{padding:0 16px}
  .nav-logo{font-size:16px;gap:8px}
  .logo-mark{width:30px;height:30px;font-size:17px}
}

/* ============ 首屏 ============ */
.hero{
  position:relative;min-height:62vh;
  display:flex;align-items:center;justify-content:center;
  text-align:center;overflow:hidden;color:#fff;
}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,16,38,.72) 0%,rgba(11,16,38,.55) 45%,rgba(11,16,38,.9) 100%);
}
.hero-inner{position:relative;z-index:2;padding:120px 24px 80px;max-width:860px}
.hero-kicker{
  font-size:13px;letter-spacing:4px;color:var(--gold-soft);
  margin-bottom:26px;opacity:.9;
}
.hero-title{
  font-size:clamp(52px,9vw,104px);letter-spacing:14px;text-indent:14px;
  background:linear-gradient(180deg,#fff 30%,var(--gold-soft) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:22px;
}
.hero-sub{font-size:clamp(16px,2.2vw,21px);color:rgba(255,255,255,.88);font-weight:300}
.hero-sub em{color:var(--gold-soft);font-style:normal}
.hero-actions{margin-top:40px;display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.btn{padding:12px 34px;border-radius:999px;font-size:15px;transition:transform .2s,box-shadow .2s,background .2s}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;box-shadow:0 8px 24px rgba(201,164,76,.35)}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.hero-scroll{
  position:absolute;bottom:20px;left:50%;transform:translateX(-50%);z-index:2;
  color:rgba(255,255,255,.85);font-size:13px;letter-spacing:2px;animation:bob 2s ease-in-out infinite;
}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,7px)}}

/* 首页首屏：地球缓缓漂移（Ken Burns） */
@keyframes heroDrift{
  0%{transform:scale(var(--hero-scale,1)) translate(0,0)}
  50%{transform:scale(calc(var(--hero-scale,1) * 1.04)) translate(-0.8%,0.5%)}
  100%{transform:scale(var(--hero-scale,1)) translate(0,0)}
}
.hero-live .hero-bg{animation:heroDrift 40s ease-in-out infinite;will-change:transform}
@media (prefers-reduced-motion:reduce){
  .hero-live .hero-bg{animation:none}
}

/* ============ 通用区块 ============ */
.section{padding:92px 0}
.section-dark{background:linear-gradient(180deg,var(--navy) 0%,var(--navy-2) 100%);color:#eef1f8}
.section-tint{background:#f0ecdf}
.sec-head{text-align:center;max-width:820px;margin:0 auto 54px}
.sec-head h2{font-size:clamp(26px,3.4vw,36px);margin-bottom:16px;letter-spacing:2px}
.section-dark .sec-head h2{color:var(--gold-soft)}
.sec-head p{color:var(--ink-soft);font-size:15.5px}
.section-dark .sec-head p{color:rgba(238,241,248,.88)}
.sec-head strong{color:var(--ink)}
.section-dark .sec-head strong{color:#fff}
.ok-text{color:var(--pro)}
.section-dark .ok-text{color:#7fc9a4}

/* ============ 域名卡片（单层、对称） ============ */
.domain-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.domain-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;display:flex;flex-direction:column;gap:12px;
  box-shadow:var(--shadow);transition:transform .25s,border-color .25s;
}
.domain-card:hover{transform:translateY(-4px);border-color:var(--gold)}
.domain-card.is-primary{border:1.6px solid var(--gold);background:linear-gradient(180deg,#fffdf6,#fff)}
.domain-card.is-pending{background:#faf8f2;border-style:dashed}
.domain-row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.domain-name{font-family:ui-monospace,Consolas,monospace;font-size:18px;font-weight:700;color:var(--navy)}
.badge{font-size:12px;padding:3px 11px;border-radius:999px;white-space:nowrap;letter-spacing:1px}
.badge-ok{background:var(--pro-bg);color:var(--pro);border:1px solid #bfe0d1}
.badge-pending{background:#f4ecd9;color:#6f5319;border:1px solid #e2d2a6}
.domain-desc{font-size:14px;color:var(--ink-soft);flex:1}
.copy-btn{
  align-self:flex-start;border:1px solid var(--navy);background:transparent;color:var(--navy);
  font-size:13px;padding:6px 18px;border-radius:999px;cursor:pointer;transition:all .2s;
}
.copy-btn:hover{background:var(--navy);color:#fff}
.tips{
  margin-top:40px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 32px;
}
.tips h3{font-size:17px;margin-bottom:12px;color:var(--navy)}
.tips ul{list-style:none;display:grid;grid-template-columns:1fr;gap:8px;font-size:14.5px;color:var(--ink-soft)}
.tips code{background:#f0ecdf;padding:1px 8px;border-radius:5px;font-size:13px;color:var(--navy)}

/* ============ 选项卡 ============ */
.tabs{
  display:grid;grid-template-columns:repeat(7,1fr);gap:10px;margin-bottom:38px;
}
.tab-btn{
  padding:14px 6px;border:1px solid rgba(201,164,76,.35);border-radius:12px;
  background:rgba(255,255,255,.05);color:rgba(238,241,248,.92);
  font-size:15px;font-family:inherit;line-height:1.5;cursor:pointer;transition:all .25s;
}
.tab-btn small{font-size:11.5px;opacity:.8;letter-spacing:1px}
.tab-btn:hover{border-color:var(--gold);color:#fff}
.tab-btn.active{
  background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;border-color:transparent;
  font-weight:700;
}
.tab-btn.active small{opacity:.85}

.panel{display:none;animation:fadeUp .45s ease}
.panel.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.panel-title{text-align:center;font-size:23px;color:#fff;margin-bottom:36px;letter-spacing:1px}

/* 关键事实：4 格严格对称 */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:34px}
.fact{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
  border-radius:12px;padding:20px 16px;
  display:flex;flex-direction:column;gap:10px;min-height:190px;
}
.fact-num{
  font-size:21px;font-weight:700;color:var(--gold-soft);font-family:ui-monospace,Consolas,monospace;
  line-height:1.3;
}
.fact-quote{font-size:15px;font-weight:700;color:var(--gold-soft);font-family:"Noto Serif SC",serif;line-height:1.6}
.fact-label{font-size:13px;color:rgba(238,241,248,.88)}

/* 正反两栏：50/50 对称 */
.sides{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.side{border-radius:12px;padding:28px 30px}
.side h4{font-size:17px;margin-bottom:14px;letter-spacing:1px}
.side ul{padding-left:20px;font-size:14.5px;display:flex;flex-direction:column;gap:10px}
.side-pro{background:linear-gradient(180deg,rgba(52,120,90,.22),rgba(52,120,90,.1));border:1px solid rgba(127,201,164,.4)}
.side-pro h4{color:#9fe0c2}
.side-pro li::marker{color:#7fc9a4}
.side-con{background:linear-gradient(180deg,rgba(165,84,66,.2),rgba(165,84,66,.08));border:1px solid rgba(224,152,136,.4)}
.side-con h4{color:#f0b8a8}
.side-con li::marker{color:#e09888}
.panel-note{
  margin-top:28px;text-align:center;font-size:14px;
  color:rgba(238,241,248,.88);border-top:1px solid rgba(255,255,255,.12);padding-top:20px;
}
.panel-note strong{color:var(--gold-soft)}
.panel-note a{color:var(--gold);border-bottom:1px solid rgba(201,164,76,.5)}

/* 浅色区块内的深色组件配色反转（假说/悖论页交替底色） */
.section:not(.section-dark) .fact{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.section:not(.section-dark) .fact-num{color:#8a6a24}
.section:not(.section-dark) .fact-label{color:var(--ink-soft)}
.section:not(.section-dark) .side-pro{background:linear-gradient(180deg,#eef6f1,#f7fbf9);border:1px solid #bfe0d1}
.section:not(.section-dark) .side-pro h4{color:var(--pro)}
.section:not(.section-dark) .side-pro li::marker{color:var(--pro)}
.section:not(.section-dark) .side-con{background:linear-gradient(180deg,#f9efec,#fdf7f5);border:1px solid #e6c3b8}
.section:not(.section-dark) .side-con h4{color:var(--con)}
.section:not(.section-dark) .side-con li::marker{color:var(--con)}
.section:not(.section-dark) .panel-note{color:var(--ink-soft);border-top:1px solid var(--line)}
.section:not(.section-dark) .panel-note strong{color:#7d621f}
.section:not(.section-dark) .panel-note a{color:#6f5319;border-bottom:1px solid #6f5319}

/* ============ 总览表 ============ */
.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.verdict-table{width:100%;border-collapse:collapse;background:#fff;font-size:15px}
.verdict-table th,.verdict-table td{padding:18px 24px;text-align:left;border-bottom:1px solid var(--line)}
.verdict-table th{background:var(--navy);color:#fff;font-family:"Noto Serif SC",serif;letter-spacing:1px;font-weight:600}
.verdict-table td:first-child{font-weight:700;width:16%;color:var(--navy)}
.verdict-table td:nth-child(2){color:var(--ink-soft);width:46%}
.verdict-table tr:last-child td{border-bottom:none}
.verdict-table tr:hover td{background:#fdfcf8}
.tag{display:inline-block;font-size:13px;padding:4px 14px;border-radius:999px;white-space:nowrap}
.tag-open{background:#f4ecd9;color:#6f5319;border:1px solid #e2d2a6}
.tag-weak{background:#eef0f6;color:#4a5c8a;border:1px solid #d2d9ea}
.tag-con{background:var(--con-bg);color:var(--con);border:1px solid #e6c3b8}
.tag-out{background:#efeaf3;color:#6d4a86;border:1px solid #d9c8e4}

/* ============ 结论 ============ */
.conclusion-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.concl-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 36px;box-shadow:var(--shadow)}
.concl-box h3{font-size:19px;color:var(--navy);margin-bottom:18px}
.concl-box ol{padding-left:22px;display:flex;flex-direction:column;gap:14px;font-size:15px;color:var(--ink-soft)}
.concl-box ol strong{color:var(--ink)}
.stance-list{list-style:none;display:flex;flex-direction:column;gap:14px;font-size:15px;color:var(--ink-soft)}
.stance{
  display:inline-block;min-width:76px;text-align:center;margin-right:12px;
  padding:3px 0;border-radius:8px;font-size:13.5px;color:#fff;font-weight:600;
}
.stance-at{background:#5a5f6e}
.stance-ag{background:#4a6f8a}
.stance-de{background:#8a7236}
.stance-th{background:#7a4f5e}
.final-line{
  margin-top:50px;text-align:center;font-size:clamp(18px,2.4vw,24px);
  color:var(--navy);line-height:2;letter-spacing:1px;
}
.final-line strong{color:#7d621f}

/* ============ 页脚 ============ */
.footer{background:var(--navy);color:rgba(255,255,255,.85);padding:70px 0 34px}
.footer h2{color:var(--gold-soft);font-size:21px;text-align:center;margin-bottom:38px;letter-spacing:1px}
.ref-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-bottom:44px}
.ref-grid ul{list-style:none;display:flex;flex-direction:column;gap:11px;font-size:13px}
.ref-grid li{padding-left:14px;position:relative;line-height:1.6}
.ref-grid li::before{content:"";position:absolute;left:0;top:10px;width:5px;height:5px;border-radius:50%;background:var(--gold)}
.copyright{text-align:center;font-size:12.5px;color:rgba(255,255,255,.7);border-top:1px solid rgba(255,255,255,.12);padding-top:26px}

/* ============ 帕斯卡赌注页：决策矩阵 ============ */
.matrix-wrap{
  max-width:920px;margin:0 auto 48px;
  display:grid;grid-template-columns:140px 1fr 1fr;grid-template-rows:auto auto;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:#fff;box-shadow:var(--shadow);
}
.matrix-corner{background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-family:"Noto Serif SC",serif;letter-spacing:2px;font-size:14px;padding:18px 8px;text-align:center;line-height:1.6}
.matrix-head{background:var(--navy);color:#fff;padding:18px 16px;text-align:center;font-family:"Noto Serif SC",serif;letter-spacing:2px;font-size:15px;border-left:1px solid rgba(255,255,255,.12)}
.matrix-head .sym{display:block;font-family:ui-monospace,Consolas,monospace;color:var(--gold-soft);font-size:17px;margin-bottom:4px}
.matrix-row-label{background:linear-gradient(180deg,var(--navy),var(--navy-2));color:#fff;padding:22px 12px;text-align:center;font-family:"Noto Serif SC",serif;letter-spacing:2px;font-size:15px;border-top:1px solid rgba(255,255,255,.12)}
.matrix-cell{padding:24px 22px;border-top:1px solid var(--line);border-left:1px solid var(--line);display:flex;flex-direction:column;gap:8px;min-height:140px}
.matrix-cell .tag{align-self:flex-start;font-size:12px;padding:3px 11px;border-radius:999px;letter-spacing:1px}
.matrix-cell .pay{font-family:ui-monospace,Consolas,monospace;font-size:18px;font-weight:700;letter-spacing:1px}
.matrix-cell .desc{font-size:13.5px;color:var(--ink-soft);line-height:1.7}
.matrix-cell.is-heaven{background:linear-gradient(180deg,#fffdf6,#faf6e8);border-left:1.6px solid var(--gold)}
.matrix-cell.is-heaven .tag{background:var(--gold);color:#1a1408}
.matrix-cell.is-heaven .pay{color:var(--gold)}
.matrix-cell.is-hell{background:linear-gradient(180deg,#f9efec,#f0ddd6)}
.matrix-cell.is-hell .tag{background:var(--con);color:#fff}
.matrix-cell.is-hell .pay{color:var(--con)}
.matrix-cell.is-neutral{background:#fff}
.matrix-cell.is-neutral .tag{background:#eef0f6;color:#4a5c8a}
.matrix-cell.is-neutral .pay{color:#4a5c8a}
.matrix-cell.is-pleasure{background:linear-gradient(180deg,#f6f4ec,#ece8da)}
.matrix-cell.is-pleasure .tag{background:#8a7236;color:#fff}
.matrix-cell.is-pleasure .pay{color:#8a7236}

/* 期望效用差值条 */
.eu-bar{
  max-width:920px;margin:0 auto 48px;display:grid;grid-template-columns:1fr 1fr;gap:18px;
}
.eu-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow);text-align:center;
}
.eu-card .lbl{font-size:13px;color:var(--ink-soft);letter-spacing:2px;margin-bottom:14px}
.eu-card .formula{font-family:ui-monospace,"Cambria Math",Consolas,monospace;font-size:17px;color:var(--navy);font-weight:700;line-height:1.8;padding:14px 16px;background:linear-gradient(180deg,#fffdf6,#faf6e8);border:1px dashed var(--gold);border-radius:8px}
.eu-card.is-win{border:1.6px solid #bfe0d1;background:linear-gradient(180deg,#f6fbf8,#eef6f1)}
.eu-card.is-win .formula{border:1.6px solid var(--pro);background:linear-gradient(180deg,#eef6f1,#dff0e6);color:var(--pro)}
.eu-card .verdict{margin-top:14px;font-size:14.5px;color:var(--ink-soft)}
.eu-card.is-win .verdict{color:var(--pro);font-weight:600}

/* 反驳：四卡格栅 */
.critique-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-bottom:16px}
.critique-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow);
  border-left:4px solid var(--con);
}
.critique-card h4{font-size:16px;color:var(--con);margin-bottom:10px;letter-spacing:1px}
.critique-card p{font-size:14px;color:var(--ink-soft);line-height:1.8}
.critique-card.is-moral{border-left-color:var(--gold)}
.critique-card.is-moral h4{color:#8a6a24}

@media (max-width:980px){
  .matrix-wrap{grid-template-columns:90px 1fr 1fr}
  .matrix-corner,.matrix-head,.matrix-row-label{font-size:13px;padding:14px 6px}
  .eu-bar,.critique-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  .matrix-wrap{grid-template-columns:70px 1fr}
  .matrix-head:nth-of-type(3){grid-column:2/3}
  .matrix-cell.is-pleasure{grid-column:2/3}
}

/* ============ 模拟假说页：公式与推导 ============ */
.lead-quote{
  max-width:880px;margin:0 auto 48px;padding:30px 36px;
  background:#fff;border-left:4px solid var(--gold);border-radius:0 var(--radius) var(--radius) 0;
  box-shadow:var(--shadow);font-family:"Noto Serif SC",serif;font-size:18px;line-height:1.85;color:var(--ink);
}
.lead-quote .who{display:block;margin-top:12px;font-size:14px;color:var(--ink-soft);font-family:"PingFang SC",sans-serif;letter-spacing:1px}

/* 三段论三卡片 */
.trilemma{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:56px}
.trilemma-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;
  text-align:center;box-shadow:var(--shadow);position:relative;
}
.trilemma-card .tag-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:50%;background:var(--navy);color:var(--gold-soft);
  font-family:"Noto Serif SC",serif;font-size:18px;margin-bottom:16px;
}
.trilemma-card h4{font-size:17px;color:var(--navy);margin-bottom:10px;letter-spacing:1px}
.trilemma-card p{font-size:14px;color:var(--ink-soft);line-height:1.75}
.trilemma-card.is-active{border:1.6px solid var(--gold);background:linear-gradient(180deg,#fffdf6,#fff)}
.trilemma-card.is-active .tag-num{background:var(--gold);color:#1a1408}

/* 符号表 */
.sym-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin-bottom:40px;font-size:15px}
.sym-table th,.sym-table td{padding:14px 22px;text-align:left;border-bottom:1px solid var(--line)}
.sym-table th{background:var(--navy);color:#fff;font-family:"Noto Serif SC",serif;letter-spacing:1px;font-weight:600}
.sym-table td:first-child{font-family:ui-monospace,Consolas,monospace;font-weight:700;color:#8a6a24;width:18%}
.sym-table td:nth-child(2){color:var(--navy);font-weight:600;width:30%}
.sym-table tr:last-child td{border-bottom:none}
.sym-table tr:hover td{background:#fdfcf8}

/* 推导步骤 */
.derive{counter-reset:step;margin-bottom:48px}
.derive-step{
  position:relative;padding:24px 30px 24px 70px;margin-bottom:14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
}
.derive-step::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:22px;top:24px;
  width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#d9b75c,#b8923f);
  color:#1a1408;font-family:"Noto Serif SC",serif;font-weight:700;font-size:16px;
  display:flex;align-items:center;justify-content:center;
}
.derive-step h4{font-size:16px;color:var(--navy);margin-bottom:10px;letter-spacing:1px}
.derive-step p{font-size:14.5px;color:var(--ink-soft);line-height:1.8}
.derive-step .formula{
  margin:14px 0 4px;padding:14px 20px;background:linear-gradient(180deg,#fffdf6,#faf6ea);
  border:1px dashed var(--gold);border-radius:8px;
  font-family:ui-monospace,"Cambria Math",Consolas,monospace;font-size:15.5px;color:var(--navy);
  text-align:center;overflow-x:auto;line-height:1.9;
}
.derive-step .formula.boxed{
  border:1.6px solid var(--gold);background:linear-gradient(180deg,#fff8e6,#f6ecc8);
  font-weight:700;font-size:16.5px;
}
.derive-step .formula sup,.derive-step .formula sub{font-size:75%}

/* 数值估算表 */
.theta-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-bottom:24px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.theta-grid .cell{padding:18px 18px;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
.theta-grid .cell:nth-child(4n){border-right:none}
.theta-grid .cell.is-head{background:var(--navy);color:#fff;font-family:"Noto Serif SC",serif;font-weight:600;letter-spacing:1px;text-align:center}
.theta-grid .cell.is-head .sym{font-family:ui-monospace,Consolas,monospace;color:var(--gold-soft);display:block;font-size:18px;margin-bottom:4px}
.theta-grid .cell.is-val{text-align:center;font-family:ui-monospace,Consolas,monospace;font-size:16px;color:var(--navy);font-weight:700}
.theta-grid .cell.is-val .tier{display:block;font-size:11px;color:var(--ink-soft);font-family:"PingFang SC",sans-serif;font-weight:400;margin-bottom:6px;letter-spacing:1px}
.theta-grid .cell.is-result{background:linear-gradient(180deg,#fffdf6,#faf6ea);text-align:center;font-family:ui-monospace,Consolas,monospace;font-weight:700;color:#8a6a24;font-size:15px}
.theta-grid .cell.is-result.is-win{background:linear-gradient(180deg,#eef6f1,#dff0e6);color:var(--pro)}
.theta-grid .cell.is-result.is-lose{background:linear-gradient(180deg,#f9efec,#f0ddd6);color:var(--con)}

.scenario-bar{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:48px;
}
.scenario-card{
  border-radius:var(--radius);padding:26px 24px;text-align:center;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
}
.scenario-card .pct{font-size:30px;font-family:"Noto Serif SC",serif;font-weight:700;letter-spacing:1px;margin-bottom:6px}
.scenario-card .lbl{font-size:13px;color:var(--ink-soft);letter-spacing:2px;margin-bottom:14px}
.scenario-card .desc{font-size:13.5px;color:var(--ink-soft);line-height:1.7}
.scenario-card.is-low .pct{color:var(--con)}
.scenario-card.is-mid .pct{color:#6f5319}
.scenario-card.is-high .pct{color:var(--pro)}
.scenario-card.is-mid{border:1.6px solid var(--gold)}
.scenario-card.is-high{border:1.6px solid #bfe0d1}

/* 公式区（结论用） */
.key-formula{
  max-width:760px;margin:0 auto 36px;padding:28px 36px;
  background:linear-gradient(180deg,#fffdf6,#faf6ea);
  border:1.6px solid var(--gold);border-radius:var(--radius);
  text-align:center;font-family:ui-monospace,"Cambria Math",Consolas,monospace;
  font-size:18px;color:var(--navy);line-height:2;
}
.key-formula .small{font-size:13px;color:var(--ink-soft);font-family:"PingFang SC",sans-serif;letter-spacing:1px;margin-top:10px;display:block}

/* 入口卡片（首页新增） */
.entry-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 32px;box-shadow:var(--shadow);transition:all .25s;position:relative;overflow:hidden;
}
.entry-card:hover{transform:translateY(-4px);border-color:var(--gold);box-shadow:0 14px 36px rgba(201,164,76,.18)}
.entry-card .ribbon{
  position:absolute;top:18px;right:-32px;transform:rotate(45deg);
  background:var(--gold);color:#1a1408;font-size:11px;padding:3px 36px;letter-spacing:1px;font-weight:700;
}
.entry-card h3{font-size:21px;color:var(--navy);margin-bottom:8px;letter-spacing:1px}
.entry-card .kicker{font-size:12.5px;color:#8a6a24;letter-spacing:3px;margin-bottom:12px}
.entry-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.8}
.entry-card .more{margin-top:18px;display:inline-block;font-size:13.5px;color:var(--navy);font-weight:600;letter-spacing:1px;border-bottom:1px solid var(--navy);padding-bottom:2px}

@media (max-width:980px){
  .trilemma{grid-template-columns:1fr}
  .theta-grid{grid-template-columns:repeat(2,1fr)}
  .theta-grid .cell:nth-child(2n){border-right:none}
  .scenario-bar{grid-template-columns:1fr}
}
@media (max-width:620px){
  .theta-grid{grid-template-columns:1fr}
  .theta-grid .cell{border-right:none}
  .derive-step{padding:22px 18px 22px 60px}
  .derive-step::before{left:14px}
  .lead-quote,.key-formula{padding:22px 20px}
}

.panel-img{width:100%;max-height:280px;object-fit:cover;border-radius:var(--radius);margin:0 0 26px;box-shadow:var(--shadow);display:block}

/* 完整推导手风琴（白卡自带底色，深浅区块通用） */
.derive-box{
  max-width:860px;margin:30px auto 0;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;
}
.derive-box summary{
  list-style:none;cursor:pointer;padding:16px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:15px;font-weight:600;color:var(--navy);letter-spacing:1px;transition:background .2s;
}
.derive-box summary::-webkit-details-marker{display:none}
.derive-box summary::after{content:"+";font-size:22px;line-height:1;font-weight:400;color:#8a6a24;transition:transform .25s}
.derive-box[open] summary::after{transform:rotate(45deg)}
.derive-box summary:hover{background:#fdfcf8}
.derive-box[open] summary{border-bottom:1px solid var(--line)}
.derive-body{padding:26px 30px 28px;font-size:14.5px;color:var(--ink-soft);line-height:1.95}
.derive-body ol{padding-left:22px;display:flex;flex-direction:column;gap:11px}
.derive-body li::marker{color:#8a6a24;font-weight:700}
.derive-body strong{color:var(--navy)}
.derive-body .key-formula{margin:20px 0 0;font-size:16px;padding:18px 22px}
.derive-body .derive-verdict{margin-top:18px;font-size:14px;text-align:center;border-top:1px dashed var(--line);padding-top:14px}
.derive-body .derive-verdict strong{color:#6f5319}
.derive-body a{color:#6f5319;border-bottom:1px solid #6f5319}
.derive-body code{background:#f0ecdf;padding:1px 7px;border-radius:5px;font-size:13px;color:var(--navy);font-family:ui-monospace,Consolas,monospace}

/* ============ 悬浮件 ============ */
#backTop{
  position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;
  border:none;background:var(--navy);color:var(--gold-soft);font-size:20px;cursor:pointer;
  opacity:0;pointer-events:none;transition:opacity .3s;box-shadow:var(--shadow);z-index:90;
}
#backTop.show{opacity:1;pointer-events:auto}
#toast{
  position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:var(--gold-soft);padding:11px 26px;border-radius:999px;
  font-size:14px;opacity:0;transition:all .3s;z-index:200;border:1px solid rgba(201,164,76,.4);
}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============ 滚动显现 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ============ VR 展厅 ============ */
.vr-card{position:relative;overflow:hidden;perspective:1200px;transform-style:preserve-3d;--mx:0;--my:0}
.vr-card:hover{transform:rotateY(calc(var(--mx,0)*4deg)) rotateX(calc(var(--my,0)*-4deg)) translateY(-3px)}
.vr-card .vr-pano{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transform:scale(1.18);transition:opacity .5s ease,transform .9s ease;z-index:0;
}
.vr-card:hover .vr-pano{opacity:.62;transform:scale(1.05)}
.vr-card > *{position:relative;z-index:1}
.vr-card .vr-pano{z-index:0}
.vr-card .vr-enter{
  position:absolute;top:14px;right:14px;z-index:2;
  display:inline-flex;align-items:center;gap:5px;
  background:rgba(11,16,38,.72);color:var(--gold-soft);
  border:1px solid rgba(201,164,76,.55);padding:6px 13px;border-radius:999px;
  font-size:12px;letter-spacing:1px;cursor:pointer;backdrop-filter:blur(4px);
  transition:background .2s,color .2s;font-family:inherit;
}
.vr-card .vr-enter::before{content:"◐ "}
.vr-card .vr-enter:hover{background:var(--gold);color:#1a1408}
.vr-overlay{
  position:fixed;inset:0;z-index:1000;background:#05070f;
  display:none;align-items:center;justify-content:center;overflow:hidden;
}
.vr-overlay.open{display:flex}
.vr-stage{position:relative;width:100%;height:100%;overflow:hidden;cursor:grab;perspective:1200px;transform-style:preserve-3d}
.vr-stage:active{cursor:grabbing}
.vr-img{
  position:absolute;top:-5%;left:0;width:170%;height:110%;max-width:none;
  object-fit:cover;will-change:transform;
  transform:translateX(-35%);transition:transform .18s ease-out;
}
.vr-caption{
  position:absolute;left:0;right:0;bottom:7vh;text-align:center;color:#fff;
  font-family:"Noto Serif SC",serif;font-size:clamp(22px,3.4vw,34px);letter-spacing:8px;
  text-shadow:0 2px 16px rgba(0,0,0,.9);z-index:2;pointer-events:none;
}
.vr-caption small{display:block;margin-top:8px;font-size:13px;letter-spacing:4px;color:var(--gold-soft);font-family:"PingFang SC",sans-serif}
.vr-close{
  position:absolute;top:22px;right:22px;z-index:3;
  background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;
  border:none;padding:10px 24px;border-radius:999px;font-size:14px;cursor:pointer;
  font-family:inherit;box-shadow:0 6px 20px rgba(201,164,76,.4);
}
.vr-hint{position:absolute;top:22px;left:22px;z-index:3;color:rgba(255,255,255,.7);font-size:13px;letter-spacing:2px;pointer-events:none}
/* 左缘暗渐变：压暗生成图里的伪外语墙文字 */
.vr-stage::before{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,7,15,.74) 0%,rgba(5,7,15,.3) 24%,transparent 47%);z-index:1;pointer-events:none}
/* 玻璃信息板：显示该展厅中文标题与关键词 */
.vr-plaque{
  position:absolute;left:4%;top:50%;transform:translateY(-50%);z-index:2;
  width:min(330px,32vw);padding:26px 28px;border-radius:16px;
  background:rgba(11,16,38,.42);backdrop-filter:blur(14px) saturate(1.1);
  border:1px solid rgba(201,164,76,.5);box-shadow:0 12px 40px rgba(0,0,0,.5);
  color:#fff;pointer-events:none;
}
.vr-plaque-title{font-family:"Noto Serif SC",serif;font-size:clamp(24px,2.6vw,32px);letter-spacing:6px;color:var(--gold-soft);margin-bottom:10px;font-weight:700}
.vr-plaque-tag{font-size:15px;color:rgba(255,255,255,.92);letter-spacing:1px;margin-bottom:16px}
.vr-plaque-kw{font-size:13.5px;line-height:2;color:rgba(230,211,154,.92);letter-spacing:1px;border-top:1px solid rgba(201,164,76,.3);padding-top:14px}
@media (max-width:680px){
  .vr-plaque{top:auto;bottom:16vh;left:4%;right:4%;width:auto;transform:none;max-height:34vh;overflow:auto}
}
@media (prefers-reduced-motion:reduce){
  .vr-card:hover{transform:none}
  .vr-card:hover .vr-pano{transform:scale(1.18)}
}

/* ============ 爱问 AI 问答 ============ */
.ai-box{max-width:760px;margin:0 auto;background:rgba(255,255,255,.05);border:1px solid rgba(201,164,76,.4);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:14px}
.ai-log{height:52vh;min-height:320px;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:6px 4px}
.ai-msg{max-width:82%;padding:12px 16px;border-radius:14px;font-size:14.5px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.ai-bot{align-self:flex-start;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:rgba(238,241,248,.94)}
.ai-user{align-self:flex-end;background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;font-weight:600}
.ai-form{display:flex;gap:10px}
.ai-input{flex:1;padding:12px 16px;border-radius:999px;border:1px solid rgba(201,164,76,.5);background:rgba(11,16,38,.6);color:#fff;font-size:15px;font-family:inherit;outline:none}
.ai-input:focus{border-color:var(--gold)}
.ai-send{padding:12px 26px;border-radius:999px;border:none;background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;transition:transform .2s}
.ai-send:hover{transform:translateY(-1px)}
.ai-note{font-size:12.5px;color:rgba(238,241,248,.75);text-align:center}

/* ===== 爱问 · 沉浸式书房 hero + 加深毛玻璃 + AI 学者头像 ===== */
.ai-hero{position:relative;overflow:hidden}
.ai-hero::before{
  content:'';position:absolute;inset:-5% -2%;z-index:0;
  background:url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Cozy%20scholar%20study%20room%20at%20night%2C%20warm%20golden%20candlelight%2C%20towering%20bookshelves%20filled%20with%20ancient%20leather%20books%2C%20a%20glowing%20celestial%20star%20chart%20on%20the%20wall%2C%20a%20brass%20telescope%20by%20the%20window%20showing%20deep%20starry%20cosmos%20outside%2C%20floating%20dust%20motes%20in%20light%2C%20deep%20navy%20and%20warm%20amber%20palette%2C%20cinematic%20atmospheric%20perspective%2C%20ultra%20detailed%2C%20no%20text%20no%20words%20no%20people&image_size=landscape_16_9') center/cover no-repeat;
  filter:saturate(115%) brightness(.55);
  animation:ai-kenburns 38s ease-in-out infinite alternate;
}
.ai-hero::after{
  content:'';position:absolute;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 80% 60% at 50% 40%,rgba(11,16,38,.25) 0%,rgba(6,9,20,.85) 70%,rgba(6,9,20,.96) 100%);
}
.ai-hero > .wrap{position:relative;z-index:2}
@keyframes ai-kenburns{
  0%{transform:scale(1.08) translate(-1.2%,-.8%)}
  100%{transform:scale(1.18) translate(1.2%,.8%)}
}
.ai-float{animation:ai-floatin 1.4s cubic-bezier(.16,.84,.44,1) both}
@keyframes ai-floatin{
  0%{opacity:0;transform:translateY(28px)}
  100%{opacity:1;transform:translateY(0)}
}
.ai-box{
  background:rgba(11,16,38,.55);
  backdrop-filter:blur(24px) saturate(160%);
  -webkit-backdrop-filter:blur(24px) saturate(160%);
  border:1px solid rgba(201,164,76,.55);
  box-shadow:0 24px 60px -20px rgba(0,0,0,.6),0 0 0 1px rgba(201,164,76,.08) inset,0 1px 0 rgba(255,255,255,.04) inset;
}
.ai-bot{
  position:relative;
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
  background:rgba(20,26,52,.62);
  border:1px solid rgba(201,164,76,.22);
  padding-left:52px;
}
.ai-bot::before{
  content:'';position:absolute;left:10px;top:50%;transform:translateY(-50%);
  width:32px;height:32px;border-radius:50%;
  background:linear-gradient(135deg,#d9b75c,#8a6a2a);
  box-shadow:0 0 0 1px rgba(201,164,76,.6),0 2px 8px rgba(0,0,0,.4);
}
.ai-bot::after{
  content:'';position:absolute;left:14px;top:50%;transform:translateY(-50%);
  width:24px;height:24px;border-radius:50%;
  background:url("data:image/svg+xml;utf8,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2064%2064'%3E%3Cpath%20d='M32%2014c-5%200-9%204-9%209%200%202.7%201.2%205.1%203.1%206.9C21.5%2031.5%2016%2036%2016%2042.5V48h32v-5.5c0-6.5-5.5-11-10.1-12.6%201.9-1.8%203.1-4.2%203.1-6.9%200-5-4-9-9-9z'%20fill='%231a1408'/%3E%3C/svg%3E") center/contain no-repeat;
}
.ai-log{scrollbar-width:thin;scrollbar-color:rgba(201,164,76,.4) transparent}
.ai-log::-webkit-scrollbar{width:6px}
.ai-log::-webkit-scrollbar-thumb{background:rgba(201,164,76,.4);border-radius:3px}

/* ============ VR 科普馆（菜单页全景背景 + 玻璃展项） ============ */
body.museum{background:#060914}
.museum-bg{
  position:fixed;inset:0;z-index:-2;background:#060914 center/cover no-repeat;
  transform:scale(1.08);
  transition:transform .55s ease-out;
  will-change:transform;
}
.museum-bg::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,9,20,.8) 0%,rgba(6,9,20,.62) 42%,rgba(6,9,20,.85) 100%);
}

/* 全屏欢迎首屏 + 滚动缩放（抬头/低头看展） */
.museum-hero{min-height:100vh}
.museum-hero .hero-bg{
  transition:none;will-change:transform,opacity,filter;
  transform:scale(1.14);
  opacity:var(--bg-fade,1);
  filter:blur(var(--bg-blur,0px));
}
.hero-live.museum-hero .hero-bg{transform:none}
/* 底部柔和渐隐：首图与后面的深色展厅无缝相接 */
.museum-hero .hero-overlay{
  background:linear-gradient(180deg,rgba(11,16,38,.6) 0%,rgba(11,16,38,.48) 52%,rgba(8,11,24,.82) 82%,#060914 100%)!important;
}
.museum-hero .hero-inner{opacity:var(--hero-fade,1)}
.museum-hero .hero-welcome{
  font-size:clamp(13px,1.6vw,16px);letter-spacing:3px;color:var(--gold-soft);
  margin-bottom:24px;opacity:.95;
  border:1px solid rgba(201,164,76,.45);border-radius:999px;
  display:inline-block;padding:9px 22px;background:rgba(11,16,38,.45);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
body.museum .section,body.museum .section-dark,body.museum .section-tint{background:transparent}
body.museum .footer{background:linear-gradient(180deg,rgba(11,16,38,.72),rgba(6,9,20,.92));backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
body.museum .section{color:rgba(238,241,248,.92)}
body.museum .sec-head h2,body.museum .section h3{color:#f3f5fa}
body.museum .sec-head p{color:rgba(238,241,248,.88)!important}
body.museum .sec-head strong{color:#fff}
body.museum .final-line{color:rgba(238,241,248,.85)}
body.museum .final-line strong{color:var(--gold-soft)}

/* 玻璃展柜：事实卡 / 结论卡 / 公式 / 推导步骤 / 手风琴 / 提示卡等 */
body.museum .fact,
body.museum .concl-box,
body.museum .key-formula,
body.museum .derive-step,
body.museum .derive-box,
body.museum .critique-card,
body.museum .scenario-card,
body.museum .entry-card,
body.museum .tips{
  background:rgba(255,255,255,.06)!important;
  border:1px solid rgba(201,164,76,.32)!important;
  box-shadow:0 10px 34px rgba(0,0,0,.38)!important;
  color:rgba(238,241,248,.92);
  backdrop-filter:blur(15px) saturate(1.1);
  -webkit-backdrop-filter:blur(15px) saturate(1.1);
}
body.museum .fact-num,body.museum .fact-quote{color:var(--gold-soft)!important}
body.museum .fact-label{color:rgba(238,241,248,.88)!important}
body.museum .key-formula .small{color:rgba(238,241,248,.78)}

/* 支持方 / 拆台方玻璃（保留绿红色调） */
body.museum .side{
  background:none!important;backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);
}
body.museum .side-pro{
  background:linear-gradient(180deg,rgba(52,120,90,.3),rgba(52,120,90,.1))!important;
  border:1px solid rgba(127,201,164,.5)!important;
}
body.museum .side-con{
  background:linear-gradient(180deg,rgba(165,84,66,.28),rgba(165,84,66,.1))!important;
  border:1px solid rgba(224,152,136,.5)!important;
}
body.museum .side li{color:rgba(238,241,248,.9)}
body.museum .panel-note{color:rgba(238,241,248,.9)!important;border-top-color:rgba(255,255,255,.15)}

/* 结论文字 */
body.museum .concl-box h3{color:var(--gold-soft)}
body.museum .concl-box ol,body.museum .stance-list{color:rgba(238,241,248,.85)}
body.museum .concl-box ol strong{color:#fff}

/* 推导手风琴与公式 */
body.museum .derive-box summary{background:rgba(11,16,38,.4);border-color:rgba(201,164,76,.3)}
body.museum .derive-box summary:hover{background:rgba(201,164,76,.16)}
body.museum .derive-box[open] summary{border-bottom-color:rgba(201,164,76,.3)}
body.museum .derive-body{color:rgba(238,241,248,.85)}
body.museum .derive-body strong{color:#fff}
body.museum .derive-body a{color:var(--gold-soft);border-bottom-color:var(--gold-soft)}
body.museum .derive-body code{background:rgba(201,164,76,.18);color:var(--gold-soft)}
body.museum .derive-step h4{color:var(--gold-soft)}
body.museum .derive-step p{color:rgba(238,241,248,.85)}
body.museum .derive-step .formula.boxed{background:rgba(11,16,38,.5);border-color:rgba(201,164,76,.5);color:#fff}

/* 表格玻璃化 */
body.museum .table-wrap,body.museum .sym-table,body.museum .theta-grid{
  background:rgba(11,16,38,.5)!important;border-color:rgba(201,164,76,.3);
  backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);
}
body.museum .verdict-table,body.museum .sym-table{color:rgba(238,241,248,.9)}
body.museum .verdict-table td,body.museum .sym-table td{border-bottom-color:rgba(255,255,255,.12)}
body.museum .verdict-table td:first-child{color:var(--gold-soft)}
body.museum .verdict-table td:nth-child(2){color:rgba(238,241,248,.85)}
body.museum .sym-table td:first-child,body.museum .sym-table td:nth-child(2){color:var(--gold-soft)}
body.museum .verdict-table tr:hover td,body.museum .sym-table tr:hover td{background:rgba(201,164,76,.1)}
body.museum .theta-grid .cell{border-color:rgba(255,255,255,.12)}
body.museum .theta-grid .cell.is-val{color:#fff}
body.museum .theta-grid .cell.is-val .tier{color:rgba(238,241,248,.7)}
body.museum .theta-grid .cell.is-result{background:rgba(201,164,76,.16)!important;color:var(--gold-soft)}
body.museum .theta-grid .cell.is-result.is-win{background:rgba(52,120,90,.25)!important;color:#9fe0c2}
body.museum .theta-grid .cell.is-result.is-lose{background:rgba(165,84,66,.25)!important;color:#f0b8a8}

/* 情景卡 / 批判卡 / 入口卡 / 提示卡文字 */
body.museum .scenario-card .lbl,body.museum .scenario-card .desc{color:rgba(238,241,248,.78)}
body.museum .scenario-card.is-low .pct{color:#e09888}
body.museum .scenario-card.is-mid .pct{color:var(--gold-soft)}
body.museum .scenario-card.is-high .pct{color:#9fe0c2}
body.museum .critique-card p{color:rgba(238,241,248,.82)}
body.museum .critique-card h4,body.museum .critique-card.is-moral h4{color:var(--gold-soft)}
body.museum .entry-card h3{color:#fff}
body.museum .entry-card .kicker{color:var(--gold-soft)}
body.museum .entry-card p{color:rgba(238,241,248,.82)}
body.museum .entry-card .more{color:var(--gold-soft);border-bottom-color:var(--gold-soft)}
body.museum .tips h3{color:var(--gold-soft)}
body.museum .tips ul{color:rgba(238,241,248,.85)}
body.museum .tips code{background:rgba(201,164,76,.18);color:var(--gold-soft)}

/* 展项目录（右侧玻璃条） */
.museum-rail{
  position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:90;
  width:136px;max-height:74vh;overflow:auto;
  display:flex;flex-direction:column;gap:4px;padding:12px;
  border-radius:16px;background:rgba(11,16,38,.6);
  backdrop-filter:blur(18px) saturate(1.15);-webkit-backdrop-filter:blur(18px) saturate(1.15);
  border:1px solid rgba(201,164,76,.45);box-shadow:0 10px 36px rgba(0,0,0,.45);
}
.museum-rail .rail-title{
  font-size:11px;letter-spacing:3px;color:var(--gold-soft);text-align:center;
  padding:2px 0 8px;margin-bottom:6px;border-bottom:1px solid rgba(201,164,76,.3);
}
.museum-rail button{
  text-align:left;padding:8px 10px;border-radius:10px;border:1px solid transparent;
  background:transparent;color:rgba(238,241,248,.78);
  font-size:12.5px;font-family:inherit;line-height:1.4;cursor:pointer;transition:all .2s;
}
.museum-rail button:hover{background:rgba(201,164,76,.14);color:#fff}
.museum-rail button.active{
  background:linear-gradient(135deg,rgba(217,183,92,.92),rgba(184,146,63,.92));
  color:#1a1408;font-weight:700;
}
.spotlight{outline:3px solid rgba(201,164,76,.9);outline-offset:10px;border-radius:8px;animation:spot 1.9s ease-out}
@keyframes spot{
  0%{outline-color:rgba(201,164,76,0);outline-offset:0}
  12%{outline-color:rgba(230,211,154,.95);outline-offset:10px}
  100%{outline-color:rgba(201,164,76,0);outline-offset:30px}
}
@media (max-width:980px){.museum-rail{display:none}}

/* 防晕车：左下角总开关 */
.motion-toggle{
  position:fixed;left:16px;bottom:18px;z-index:120;
  padding:9px 16px;border-radius:999px;font-size:13px;letter-spacing:1px;
  font-family:inherit;cursor:pointer;color:var(--gold-soft);
  background:rgba(11,16,38,.62);border:1px solid rgba(201,164,76,.5);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:0 6px 20px rgba(0,0,0,.4);transition:background .2s,color .2s;
}
.motion-toggle:hover{background:rgba(201,164,76,.2);color:#fff}
body.motion-off .motion-toggle{background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;border-color:transparent}

/* 防晕车开启：一切滚动/视差/漂移动效全部静止，页面保持最终可用状态 */
body.motion-off .museum-bg{transform:scale(1.04)!important;transition:none}
body.motion-off .museum-hero .hero-bg{
  transform:scale(1.05)!important;opacity:1!important;filter:none!important;
}
body.motion-off .museum-hero .hero-inner{opacity:1!important}
body.motion-off .hero-live .hero-bg{animation:none}
body.motion-off .vr-card{--mx:0;--my:0}
body.motion-off .vr-card:hover{transform:none}
body.motion-off .vr-card .vr-pano{transition:opacity .3s ease}
body.motion-off .spotlight{animation:none;outline-color:rgba(201,164,76,.9)}
body.motion-off .hero-scroll,body.motion-off .hero-welcome{animation:none}

/* ============ 响应式 ============ */
@media (max-width:980px){
  .domain-grid{grid-template-columns:repeat(2,1fr)}
  .tabs{grid-template-columns:repeat(4,1fr)}
  .facts{grid-template-columns:repeat(2,1fr)}
  .ref-grid{grid-template-columns:repeat(2,1fr)}
  .conclusion-grid,.sides{grid-template-columns:1fr}
}
@media (max-width:620px){
  .section{padding:64px 0}
  .domain-grid{grid-template-columns:1fr}
  .tabs{grid-template-columns:repeat(2,1fr)}
  .facts{grid-template-columns:1fr}
  .ref-grid{grid-template-columns:1fr}
  .hero-title{letter-spacing:8px;text-indent:8px}
}

/* ============ 八面 3D 环绕环幕 VR 展厅（hypotheses.html · body.rotunda-page，类名一律 rot- 前缀） ============ */
body.rotunda-page{overflow:hidden;background:#060914}
.rotunda{
  position:fixed;inset:0;z-index:0;overflow:hidden;
  /* 长焦视角：环半径 120.71vw 固定，相机距离取 ≈17.67 个半径（2133vw），
     正面放大率 d/(d-r)≈1.06，任意屏宽环幕都在相机前方且正面铺满；
     切勿在 preserve-3d 的 .rot-world 上用 scale() 做适配——Chrome 下会导致 3D 子面不绘制 */
  perspective:2133vw;perspective-origin:50% 45%;background:#060914;
}
/* --base 换面旋转 / --look 鼠标环视（纯 vw 几何，无需 JS 缩放，任意视口自适应） */
.rot-world{
  position:absolute;inset:0;transform-style:preserve-3d;will-change:transform;
  --base:0deg;--look:0deg;
  transform:rotateY(calc(var(--base) + var(--look)));
  transition:transform .9s cubic-bezier(.65,0,.25,1);
}
.rot-panel{
  position:absolute;left:50%;top:50%;width:100vw;height:100vh;margin:0;
  overflow:hidden;transform-origin:center;
  transform:translate(-50%,-50%) rotateY(calc(var(--i)*45deg)) translateZ(120.71vw);
  background:#0b1026 center/cover no-repeat;backface-visibility:hidden;
  display:flex;align-items:center;justify-content:center;
  padding:92px 4vw 128px;
}
.rot-panel::after{
  content:'';position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(6,9,20,.86),rgba(6,9,20,.35) 30%,rgba(6,9,20,.35) 70%,rgba(6,9,20,.86)),
    linear-gradient(180deg,rgba(6,9,20,.55),rgba(6,9,20,.25) 40%,rgba(6,9,20,.85));
}

/* 穹顶与镜面大理石地面（固定层，换面转动的间隙露出，制造身处环廊的空间感） */
.rot-ceiling{
  position:absolute;left:-10%;right:-10%;top:-40vh;height:58vh;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse at 50% 100%,rgba(28,40,82,.92),rgba(6,9,20,0) 72%);
  border-radius:50% 50% 0 0/100% 100% 0 0;
}
.rot-floor{
  position:absolute;left:-10%;right:-10%;bottom:-6vh;height:48vh;z-index:1;pointer-events:none;
  border-top:1px solid rgba(201,164,76,.28);
  background:
    radial-gradient(ellipse at 50% 0%,rgba(201,164,76,.18),rgba(6,9,20,0) 55%),
    linear-gradient(180deg,rgba(6,9,20,0) 0%,rgba(201,164,76,.1) 34%,rgba(6,9,20,.96) 100%),
    repeating-linear-gradient(90deg,rgba(201,164,76,.09) 0 2px,transparent 2px 120px);
  opacity:.92;
}

/* 玻璃卡：基础可见性（2D overlay 直接渲染，3D 面板已不承载内容） */
.rot-card{
  position:relative;z-index:2;width:min(1080px,86vw);max-height:78vh;overflow:auto;
  margin:auto;padding:32px 40px;border-radius:20px;
  background:rgba(9,13,30,.82);
  backdrop-filter:blur(16px) saturate(1.15);-webkit-backdrop-filter:blur(16px) saturate(1.15);
  border:1px solid rgba(201,164,76,.45);
  box-shadow:0 24px 70px rgba(0,0,0,.5),inset 0 0 60px rgba(201,164,76,.05);
  color:rgba(238,241,248,.92);
  opacity:1;transform:none;
  transition:box-shadow .35s ease,border-color .35s ease;
  scrollbar-width:thin;scrollbar-color:rgba(201,164,76,.5) transparent;
}
.rot-kicker{text-align:center;letter-spacing:4px;font-size:12px;color:rgba(201,164,76,.85);margin-bottom:8px}
.rot-card h2{
  font-size:clamp(22px,2.6vw,32px);letter-spacing:2px;text-align:center;
  color:var(--gold-soft);margin-bottom:18px;
}
.rot-lead{font-size:15px;line-height:1.9;text-align:justify;color:rgba(238,241,248,.92);margin-bottom:18px}

/* fact 小金片 */
.rot-facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin:18px 0 22px}
.rot-fact{
  background:rgba(201,164,76,.1);border:1px solid rgba(201,164,76,.4);
  border-radius:12px;padding:10px 14px;
}
.rot-fact b{
  display:block;font-family:"Noto Serif SC",serif;font-size:16px;
  color:var(--gold-soft);margin-bottom:2px;
}
.rot-fact span{font-size:12.5px;line-height:1.65;color:rgba(238,241,248,.78)}

/* 左右双栏：支持方绿边玻璃 / 质询方红边玻璃 */
.rot-sides{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.rot-pro,.rot-con{border-radius:16px;padding:18px 20px}
.rot-pro{
  background:linear-gradient(180deg,rgba(52,120,90,.26),rgba(52,120,90,.08));
  border:1px solid rgba(127,201,164,.5);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.rot-con{
  background:linear-gradient(180deg,rgba(165,84,66,.24),rgba(165,84,66,.08));
  border:1px solid rgba(224,152,136,.5);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.rot-pro h4,.rot-con h4{font-size:15px;letter-spacing:2px;margin-bottom:10px}
.rot-pro h4{color:#9fe0c2}
.rot-con h4{color:#f0b8a8}
.rot-pro ul,.rot-con ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.rot-pro li,.rot-con li{
  position:relative;padding-left:16px;font-size:13.5px;line-height:1.7;
  color:rgba(238,241,248,.88);
}
.rot-pro li::before,.rot-con li::before{
  content:'';position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
}
.rot-pro li::before{background:#7fc9a4}
.rot-con li::before{background:#e09888}
.rot-tag{
  display:inline-block;font-style:normal;font-size:11px;letter-spacing:1px;
  color:var(--gold-soft);border:1px solid rgba(201,164,76,.5);border-radius:999px;
  padding:0 8px;margin-right:7px;vertical-align:1px;white-space:nowrap;
}

/* 底部金线会诊结论 + 专题页链接 */
.rot-verdict{
  border-top:1px solid rgba(201,164,76,.4);padding-top:14px;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;justify-content:space-between;
  font-size:14px;color:rgba(238,241,248,.92);
}
.rot-verdict strong{color:var(--gold-soft)}
.rot-link{
  color:var(--gold-soft);font-size:13.5px;letter-spacing:1px;white-space:nowrap;
  border-bottom:1px solid rgba(201,164,76,.6);transition:color .2s,border-color .2s;
}
.rot-link:hover{color:#fff;border-color:#fff}
.rot-foot{
  margin-top:16px;text-align:center;font-size:13px;font-style:italic;letter-spacing:1px;
  color:rgba(230,211,154,.75);
}

/* 序章：会诊规则 + 按钮 */
.rot-rules{
  list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0 24px;
}
.rot-rules li{
  background:rgba(255,255,255,.05);border:1px solid rgba(201,164,76,.3);
  border-radius:12px;padding:12px 16px;font-size:13.5px;line-height:1.7;
  color:rgba(238,241,248,.88);
}
.rot-rules b{color:var(--gold-soft);letter-spacing:2px}
.rot-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.rot-btn{
  display:inline-block;padding:12px 30px;border-radius:999px;cursor:pointer;
  font-size:14px;letter-spacing:3px;transition:transform .25s,box-shadow .25s,background .25s,color .25s;
}
.rot-btn-gold{
  background:linear-gradient(135deg,#d9b75c,#b8923f);color:#1a1408;font-weight:700;
  box-shadow:0 8px 26px rgba(201,164,76,.35);
}
.rot-btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(201,164,76,.5)}
.rot-btn-ghost{
  border:1px solid rgba(201,164,76,.6);color:var(--gold-soft);background:rgba(11,16,38,.4);
}
.rot-btn-ghost:hover{background:rgba(201,164,76,.16);color:#fff}

/* 成绩单：判词表 + 参考资料 */
.rot-grade{width:100%;border-collapse:collapse;font-size:13.5px;margin:6px 0 18px}
.rot-grade th,.rot-grade td{border-bottom:1px solid rgba(255,255,255,.12);padding:9px 10px;text-align:left;vertical-align:middle}
.rot-grade th{color:var(--gold-soft);font-weight:600;letter-spacing:1px;font-size:12.5px}
.rot-grade td{color:rgba(238,241,248,.85);line-height:1.6}
.rot-grade td:first-child{color:var(--gold-soft);white-space:nowrap;font-family:"Noto Serif SC",serif}
.rot-status{
  display:inline-block;font-size:11.5px;white-space:nowrap;padding:2px 10px;border-radius:999px;
  border:1px solid rgba(201,164,76,.55);color:var(--gold-soft);background:rgba(201,164,76,.12);
}
.rot-status.is-weak{border-color:rgba(224,152,136,.6);color:#f0b8a8;background:rgba(165,84,66,.14)}
.rot-refs-title{
  color:var(--gold-soft);font-size:14px;letter-spacing:2px;margin-bottom:10px;
  padding-top:4px;border-top:1px solid rgba(201,164,76,.3);padding-top:14px;
}
.rot-refs{
  list-style:none;columns:2;column-gap:26px;margin-bottom:20px;
  font-size:12.5px;line-height:1.7;color:rgba(238,241,248,.78);
}
.rot-refs li{break-inside:avoid;margin-bottom:7px;padding-left:16px;position:relative}
.rot-refs li::before{content:'※';position:absolute;left:0;color:var(--gold)}

/* 底部 HUD */
.rot-hud{
  position:fixed;left:0;right:0;bottom:26px;z-index:30;text-align:center;color:#fff;
  pointer-events:none;
}
.rot-dots{display:flex;gap:10px;justify-content:center;margin-bottom:12px;pointer-events:auto}
.rot-dot{
  width:10px;height:10px;padding:0;border-radius:50%;cursor:pointer;
  border:1px solid rgba(201,164,76,.8);background:rgba(201,164,76,.15);
  transition:background .3s,transform .3s,box-shadow .3s;
}
.rot-dot:hover{background:rgba(201,164,76,.5)}
.rot-dot.is-active{
  background:var(--gold);transform:scale(1.5);
  box-shadow:0 0 12px rgba(201,164,76,.8);
}
.rot-caption{
  font-family:"Noto Serif SC",serif;letter-spacing:4px;color:var(--gold-soft);font-size:18px;
  text-shadow:0 2px 12px rgba(0,0,0,.8);
}
.rot-hint{font-size:12px;letter-spacing:2px;color:rgba(255,255,255,.55);margin-top:6px}
/* HUD 底部版权行（固定在"移动鼠标环视"下一行，链接可点） */
.rot-copy{
  margin-top:9px;font-size:11.5px;letter-spacing:.5px;line-height:1.7;
  color:rgba(238,241,248,.55);pointer-events:none;
}
.rot-copy a{color:rgba(230,211,154,.8);border-bottom:1px solid rgba(201,164,76,.35);transition:color .2s,border-color .2s;pointer-events:auto}
.rot-copy a:hover{color:#eeda9f;border-bottom-color:#eeda9f}
.rot-copy .rot-beian{white-space:nowrap}

/* 窄屏 */
@media (max-width:760px){
  .rot-panel{padding:82px 3vw 118px}
  .rot-card{width:92vw;max-height:80vh;padding:22px 18px}
  .rot-card h2{font-size:21px}
  .rot-facts{grid-template-columns:repeat(2,1fr)}
  .rot-sides,.rot-rules{grid-template-columns:1fr}
  .rot-refs{columns:1}
  .rot-pro li,.rot-con li{font-size:12.5px}
  .rot-grade{font-size:12.5px}
  .rot-verdict{flex-direction:column;align-items:flex-start}
  .rot-caption{font-size:14px;letter-spacing:2px}
  .rot-btn{padding:10px 22px;font-size:13px}
  .rot-hud{bottom:14px}
  .rot-copy{font-size:10.5px;letter-spacing:0;line-height:1.65;padding:0 4vw}
  .rot-copy .rot-beian{white-space:normal}
}

/* 防晕车：换面瞬时、卡片即时淡入、环视由 JS 停用 */
body.motion-off .rot-world{transition:transform .01ms!important}
body.motion-off .rot-card,
body.motion-off .rot-panel.is-active .rot-card{transition:none}

/* ============ 学者剪影头像（.rot-pro/.rot-con 内 li 自动注入） ============ */
.rot-pro li.has-ava,
.rot-con li.has-ava{
  padding-left:0;display:flex;align-items:flex-start;gap:10px;
}
.rot-pro li.has-ava::before,
.rot-con li.has-ava::before{display:none}
.rot-avatar{
  position:relative;flex-shrink:0;width:40px;height:40px;
  display:inline-block;border-radius:50%;
  background:radial-gradient(circle at 50% 30%,rgba(201,164,76,.18),rgba(11,16,38,.95));
  border:1px solid rgba(201,164,76,.55);
  box-shadow:0 2px 8px rgba(0,0,0,.4),inset 0 0 8px rgba(201,164,76,.08);
}
.rot-ava-base{
  position:absolute;left:6px;top:5px;width:28px;height:28px;
  color:rgba(230,211,154,.85);
  filter:drop-shadow(0 1px 2px rgba(0,0,0,.5));
}
.rot-ava-badge{
  position:absolute;right:-3px;bottom:-3px;width:18px;height:18px;
  background:#060914;border:1.4px solid var(--gold);border-radius:50%;
  padding:1.5px;color:var(--gold-soft);
  box-shadow:0 1px 4px rgba(0,0,0,.5);
}
.rot-pro li.has-ava:hover .rot-avatar,
.rot-con li.has-ava:hover .rot-avatar{
  border-color:var(--gold);
  box-shadow:0 4px 14px rgba(201,164,76,.35),inset 0 0 12px rgba(201,164,76,.18);
}
.rot-pro li.has-ava .rot-tag,
.rot-con li.has-ava .rot-tag{
  display:inline-block;margin-top:8px;
}
@media (max-width:760px){
  .rot-avatar{width:34px;height:34px}
  .rot-ava-base{left:5px;top:4px;width:24px;height:24px}
  .rot-ava-badge{width:16px;height:16px;right:-2px;bottom:-2px}
}

/* ============ 环幕沉浸感增强：远端暖雾 / 顶部光柱 / 镜面反射 / 面板呼吸 ============ */
/* 远端暖色雾气：增强空间纵深感 */
.rotunda::before{
  content:'';position:absolute;left:0;right:0;top:30%;bottom:0;z-index:0;
  background:
    radial-gradient(ellipse 60% 30% at 50% 100%,rgba(201,164,76,.10),transparent 70%),
    radial-gradient(ellipse 40% 25% at 50% 50%,rgba(86,108,168,.08),transparent 80%);
  pointer-events:none;mix-blend-mode:screen;
}
/* 顶部光柱：模拟穹顶射灯 */
.rotunda::after{
  content:'';position:absolute;left:30%;right:30%;top:0;height:24vh;z-index:0;
  background:linear-gradient(180deg,rgba(255,238,180,.10),rgba(255,238,180,.03) 50%,transparent);
  pointer-events:none;mix-blend-mode:screen;
  filter:blur(8px);
}
/* 当前面板轻微金边光晕（叠加在 .rot-panel::after 暗角之上） */
.rot-panel.is-active::before{
  content:'';position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(ellipse at 50% 0%,rgba(201,164,76,.10),transparent 55%),
    radial-gradient(ellipse at 50% 100%,rgba(201,164,76,.08),transparent 60%);
  mix-blend-mode:screen;
  animation:rotBreathe 6s ease-in-out infinite alternate;
}
@keyframes rotBreathe{
  from{opacity:.5}
  to{opacity:1}
}
body.motion-off .rot-panel.is-active::before{animation:none;opacity:.85}
@media (prefers-reduced-motion: reduce){
  .rot-panel.is-active::before{animation:none;opacity:.85}
}

/* 玻璃卡 hover 金线高光：模拟走近展品时的反光（适配 2D overlay 新结构） */
.rot-card:hover{
  border-color:rgba(201,164,76,.85);
  box-shadow:0 28px 80px rgba(0,0,0,.55),inset 0 0 80px rgba(201,164,76,.08),0 0 24px rgba(201,164,76,.2);
}

/* 镜面地面加深：当前面投影更明显 */
body.rotunda-page .rot-floor{
  background:
    radial-gradient(ellipse at 50% 0%,rgba(201,164,76,.22),rgba(6,9,20,0) 50%),
    linear-gradient(180deg,rgba(6,9,20,0) 0%,rgba(201,164,76,.13) 28%,rgba(6,9,20,.97) 100%),
    repeating-linear-gradient(90deg,rgba(201,164,76,.10) 0 2px,transparent 2px 110px),
    linear-gradient(180deg,rgba(255,255,255,.015),transparent 40%);
}
body.rotunda-page .rot-floor::after{
  content:'';position:absolute;left:50%;top:0;width:30vw;height:30%;transform:translateX(-50%);
  background:radial-gradient(ellipse 50% 100% at 50% 0%,rgba(230,211,154,.10),transparent);
  pointer-events:none;
}

/* 序章面板特殊处理：欢迎词区金边略亮，引导玩家视线 */
.rot-panel:first-child .rot-card{
  border-color:rgba(201,164,76,.65);
  box-shadow:0 24px 70px rgba(0,0,0,.5),inset 0 0 80px rgba(201,164,76,.10),0 0 32px rgba(201,164,76,.18);
}

/* ================================================================
   VR 沉浸增强 v2 —— 文字清晰 / 展厅 VR 背景恢复 / 总体美化
   ================================================================ */

/* —— 1) 文字清晰：卡片底色加深提高对比 + 全局抗锯齿 + 字号提档 —— */
.rotunda{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-feature-settings:"kern" 1}
.rot-card{
  background:rgba(9,13,30,.82);
  backdrop-filter:blur(16px) saturate(1.15);-webkit-backdrop-filter:blur(16px) saturate(1.15);
}
.rot-card h2{text-shadow:0 2px 14px rgba(0,0,0,.65);font-size:30px}
.rot-lead{font-size:16px;line-height:2;color:rgba(240,244,252,.98)}
.rot-fact span{font-size:14px;line-height:1.7;color:rgba(242,246,252,.92)}
.rot-fact b{font-size:16px}
.rot-pro li,.rot-con li{font-size:15px;line-height:1.8;color:rgba(242,246,252,.97)}
.rot-tag{font-size:12px}
.rot-rules li{font-size:15px;line-height:1.8;color:rgba(242,246,252,.97)}
.rot-verdict{font-size:15px;color:rgba(242,246,252,.97)}
.rot-foot{font-size:13px;color:rgba(230,211,154,.88)}
.rot-kicker{font-size:12px}

/* —— 2) 恢复四大展厅 VR 背景：墙面放大盖缝 + 当前面 ken-burns 缓慢漂移（原 museum-bg 呼吸感） —— */
/* 注意：绝不加 scale() 在 rot-panel 上——Windows Chrome 3D 变换 scale 会把文字压成亚像素发虚 */
.rot-panel{
  transform:translate(-50%,-50%) rotateY(calc(var(--i)*45deg)) translateZ(120.71vw);
  background-size:cover;
}
/* 用 background-size 自身盖缝，不碰 transform */
.rot-panel.is-active{
  animation:rot-kenburns 34s ease-in-out infinite alternate;
}
@keyframes rot-kenburns{
  0%{background-position:38% 42%;background-size:108% auto}
  100%{background-position:62% 55%;background-size:118% auto}
}
/* 暗角强化：museum-bg 同款三段纵向渐变，文字区域更沉、边缘更暗，聚焦感回归 */
.rot-panel::after{
  background:
    linear-gradient(90deg,rgba(6,9,20,.88),rgba(6,9,20,.32) 28%,rgba(6,9,20,.32) 72%,rgba(6,9,20,.88)),
    linear-gradient(180deg,rgba(6,9,20,.62),rgba(6,9,20,.22) 42%,rgba(6,9,20,.88));
}
body.motion-off .rot-panel.is-active{animation:none;background-position:center;background-size:112% auto}
@media (prefers-reduced-motion: reduce){
  .rot-panel.is-active{animation:none;background-position:center}
}

/* —— 3) 总体美化：卡片金顶线 / fact 悬浮 / 进度点 / 提示 / 按钮质感 —— */
/* 卡片顶部一条金色渐变高光线，像展厅射灯打在玻璃柜顶 */
.rot-card::before{
  content:'';position:absolute;left:8%;right:8%;top:0;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(230,211,154,.75) 30%,rgba(230,211,154,.75) 70%,transparent);
}
/* fact 金片悬浮：走近时微微抬起发亮 */
.rot-fact{transition:transform .3s ease,border-color .3s ease,background .3s ease}
.rot-fact:hover{
  transform:translateY(-3px);
  border-color:rgba(201,164,76,.75);
  background:rgba(201,164,76,.16);
}
/* 进度点更精致：拉长成胶囊，当前面金光呼吸 */
.rot-dot{width:9px;height:9px;border-color:rgba(201,164,76,.65)}
.rot-dot.is-active{
  width:26px;border-radius:6px;
  animation:dotGlow 2.4s ease-in-out infinite alternate;
}
@keyframes dotGlow{
  from{box-shadow:0 0 8px rgba(201,164,76,.6)}
  to{box-shadow:0 0 16px rgba(201,164,76,.95)}
}
/* 当前面标题金光更亮 */
.rot-hud .rot-caption.is-active{color:#eeda9f}
/* 虚拟按钮 hover 填充金底 */
.rot-btn-ghost:hover{
  background:rgba(201,164,76,.18);color:#fff;border-color:var(--gold);
  transform:translateY(-2px);
}
/* 学者头像微光：呼吸一点生命感 */
.rot-avatar{transition:box-shadow .3s ease}
.rot-pro li:hover .rot-avatar,.rot-con li:hover .rot-avatar{
  box-shadow:0 0 0 1px rgba(230,211,154,.9),0 0 14px rgba(201,164,76,.45);
}
/* 滚动条金边细化 */
.rot-card::-webkit-scrollbar{width:8px}
.rot-card::-webkit-scrollbar-thumb{background:rgba(201,164,76,.45);border-radius:4px}
.rot-card::-webkit-scrollbar-track{background:transparent}

/* —— Nav 在环幕页：沉浸式半透明（不挡 3D 也不糊文字） —— */
body.rotunda-page .nav{
  background:rgba(7,11,26,.55);
  backdrop-filter:blur(14px) saturate(1.2);-webkit-backdrop-filter:blur(14px) saturate(1.2);
  border-bottom:1px solid rgba(201,164,76,.3);
}

/* —— 关键修复：rot-overlay 2D 覆盖层，文字在 2D 平面渲染 = ClearType 恢复 —— */
/* 根因：Chrome preserve-3d 把 3D 变换链内的所有子元素作为合成纹理渲染，
   子像素抗锯齿完全丢失。nav logo 在 position:fixed 层所以清晰。
   解法：把 rot-card 从 rot-panel（3D 变换链）拆到独立 2D 覆盖层。 */
.rot-overlay{
  position:absolute;inset:0;z-index:10;pointer-events:none;
  display:flex;align-items:center;justify-content:center;
}
.rot-overlay .rot-card{
  pointer-events:auto;
  animation:rotCardFadeIn .55s ease-out both;
  opacity:1;transform:none;
}
@keyframes rotCardFadeIn{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:none}
}
/* 3D 面板纯背景层，不再承载任何 HTML */
.rot-panel{pointer-events:none}
body.rotunda-page .nav-logo span{color:#fff;font-size:18px;font-weight:600;letter-spacing:2px}
body.rotunda-page .nav-links a{color:rgba(255,255,255,.92);font-size:15px;letter-spacing:1px}
body.rotunda-page .nav-links a:hover{color:#eeda9f}
body.rotunda-page .logo-mark{
  border:1.5px solid #c9a44c;border-radius:50%;
  filter:drop-shadow(0 0 4px rgba(201,164,76,.5));
}
/* nav link 当前页高亮 */
.nav-links a.nav-active{color:#eeda9f;font-weight:600}
body.rotunda-page .nav-links a.nav-active{color:#eeda9f;border-bottom:1px solid rgba(230,211,154,.8);padding-bottom:2px}
/* 汉堡菜单（移动端） */
.nav-links.is-open{max-height:360px!important}
/* nav 文字清晰度：整数像素、纯白色、禁止 subpixel */
.nav-logo span,.nav-links a{
  -webkit-font-smoothing:antialiased;font-smooth:always;
}