/* ============================================================================
   深空档案 · Deep Field Archive
   home.css — 首页专用视觉系统（2026 版）
   设计语言：观测台铜版册页（Observatory Plate）
   —— 温暖纸白 / 氧化黄铜 / 冰蓝数据 / 发丝级分隔线 / 仪器框角标
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root{
  --bg:        #070809;
  --bg-2:      #0b0c0e;
  --surface:   #101114;
  --surface-2: #15171b;

  --ink:   #f6f3ec;
  --ink-2: #c2bfb5;
  --ink-3: #95928a;
  --ink-4: #6b6862;

  --line:    rgba(245,242,234,.13);
  --line-2:  rgba(245,242,234,.07);

  --gold:    #c9a462;
  --gold-2:  #eed69c;
  --gold-dim:rgba(201,164,98,.16);
  --ice:     #83b6d4;
  --ice-dim: rgba(131,182,212,.16);
  --warn:    #cf7a5c;

  --mono:   ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;
  --serif:  "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --sans:   -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;

  --max: 1340px;
  --gut: clamp(20px, 4.4vw, 68px);
  --ease: cubic-bezier(.16,1,.3,1);
  --ease-2: cubic-bezier(.4,0,.2,1);
}

/* ---------- 基础 ---------- */
*,*::before,*::after{ margin:0; padding:0; box-sizing:border-box }

html{
  background:var(--bg);
  color-scheme:dark;
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.012em;
  overflow-x:clip;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeSpeed;
}

/* 背景：极深的天顶辉光 + 细颗粒 */
body::before{
  content:"";
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(120% 80% at 78% 4%,  rgba(201,164,98,.075) 0%, rgba(201,164,98,0) 52%),
    radial-gradient(90% 60% at 10% 0%,   rgba(131,182,212,.05) 0%, rgba(131,182,212,0) 50%),
    radial-gradient(140% 90% at 50% 118%, rgba(20,22,28,.9) 0%, rgba(7,8,9,0) 60%);
}
body::after{
  content:"";
  position:fixed; inset:0; z-index:1; pointer-events:none; opacity:.032;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

::selection{ background:var(--gold); color:#08090a }

::-webkit-scrollbar{ width:9px; height:9px }
::-webkit-scrollbar-track{ background:#050607 }
::-webkit-scrollbar-thumb{ background:#20232a; border-radius:0 }
::-webkit-scrollbar-thumb:hover{ background:var(--gold) }

h1,h2,h3,h4{ font-weight:600; line-height:1.2; letter-spacing:-.012em }
p{ text-wrap:pretty }
a{ color:inherit; text-decoration:none }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer }
img{ display:block; max-width:100% }
b,strong{ font-weight:600; color:var(--ink) }
em{ font-style:normal }

:focus-visible{ outline:1px solid var(--gold); outline-offset:3px }

/* ---------- 通用工具 ---------- */
.wrap{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--gut);
  position:relative;
  z-index:2;
}

.mono{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--ink-3);
}

/* 仪器框角标：四角细线 */
.ticks{ position:relative }
.ticks::before,
.ticks::after{
  content:"";
  position:absolute;
  width:10px; height:10px;
  border-color:var(--line);
  border-style:solid;
  pointer-events:none;
}
.ticks::before{ top:0; left:0; border-width:1px 0 0 1px }
.ticks::after{ bottom:0; right:0; border-width:0 1px 1px 0 }

/* ---------- 顶部导航 ---------- */
header.top{
  position:fixed; inset:0 0 auto 0; z-index:60;
  display:flex; align-items:center; justify-content:space-between;
  gap:24px;
  padding:22px var(--gut);
  transition:background-color .3s var(--ease-2), padding .3s var(--ease-2), border-color .3s var(--ease-2);
  border-bottom:1px solid transparent;
}
header.top::before{
  content:"";
  position:absolute; inset:0; z-index:-1;
  background:linear-gradient(to bottom, rgba(7,8,9,.92), rgba(7,8,9,.55) 60%, rgba(7,8,9,0));
  opacity:0;
  transition:opacity .45s var(--ease-2);
}
header.top.solid{ padding-top:14px; padding-bottom:14px; border-bottom-color:var(--line-2) }
header.top.solid::before{ opacity:1 }
header.top.solid{ backdrop-filter:blur(14px) saturate(120%) }

.mark{
  display:flex; align-items:center; gap:12px;
  font-family:var(--mono); font-size:10.5px;
  letter-spacing:.2em; text-transform:uppercase;
  color:var(--ink-3); white-space:nowrap;
}
.mark .aperture{
  position:relative; width:16px; height:16px; flex:none; border-radius:50%;
  border:1px solid var(--gold);
  background:
    conic-gradient(from 210deg, rgba(201,164,98,.75) 0deg, rgba(201,164,98,0) 120deg, rgba(201,164,98,.5) 240deg, rgba(201,164,98,0) 360deg);
  box-shadow:0 0 16px rgba(201,164,98,.35);
  animation:apertureSpin 24s linear infinite;
}
.mark .aperture::after{
  content:""; position:absolute; inset:5px; border-radius:50%;
  background:var(--bg); box-shadow:inset 0 0 6px rgba(201,164,98,.5);
}
@keyframes apertureSpin{ to{ transform:rotate(360deg) } }
.mark b{ font-family:var(--sans); font-weight:600; font-size:12px; letter-spacing:.18em; color:var(--ink) }

/* 模块切换 */
.view-switcher{
  display:flex; align-items:center; gap:4px;
  padding:4px;
  border:1px solid var(--line-2);
  background:rgba(16,17,20,.5);
  position:relative;
}
.view-tab{
  position:relative;
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 16px;
  font-size:12.5px; letter-spacing:.06em;
  color:var(--ink-3);
  transition:color .3s var(--ease-2), background-color .3s var(--ease-2);
}
.view-tab .vt-num{
  font-family:var(--mono); font-size:9px; letter-spacing:.1em;
  color:var(--ink-4); opacity:.9;
}
.view-tab:hover{ color:var(--ink); background:rgba(245,242,234,.045) }
.view-tab.on, .view-tab.active{ color:#0a0b0c; background:var(--gold) }
.view-tab.on .vt-num, .view-tab.active .vt-num{ color:rgba(10,11,12,.55) }

/* 顶栏工具 */
.top-tools{ display:flex; align-items:center; gap:10px }
.tool-pill{
  position:relative; overflow:hidden;
  display:inline-flex; align-items:center; gap:8px;
  padding:9px 16px;
  border:1px solid var(--line);
  font-family:var(--mono); font-size:10.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink-2); white-space:nowrap;
  transition:color .3s var(--ease-2), border-color .3s var(--ease-2);
}
.tool-pill::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:var(--gold); transform:translateY(101%);
  transition:transform .45s var(--ease);
}
.tool-pill:hover{ color:#0a0b0c; border-color:var(--gold) }
.tool-pill:hover::before{ transform:translateY(0) }
.tool-pill .tp-txt{ position:relative; z-index:1 }

/* 顶部滚动进度 */
.rail{
  position:fixed; top:0; left:0; right:0; height:2px; z-index:70;
  pointer-events:none; background:transparent;
}
.rail i{
  display:block; height:100%; width:100%;
  transform:scaleX(0); transform-origin:0 50%;
  will-change:transform;
  background:linear-gradient(90deg, var(--gold), var(--gold-2));
  box-shadow:0 0 12px rgba(201,164,98,.6);
}

/* ---------- 首屏 ---------- */
.hero-stage-section{
  position:relative;
  min-height:min(100svh, 980px);
  display:flex; align-items:center;
  padding-top:clamp(92px,11vh,132px);
  padding-bottom:clamp(30px,4vh,54px);
  overflow:hidden;
}
/* 首屏背后的同心环（光圈意象） */
.hero-stage-section::before{
  content:"";
  position:absolute; z-index:0;
  top:50%; right:min(-8vw,-40px);
  width:min(78vw,1040px); aspect-ratio:1;
  transform:translateY(-50%);
  border-radius:50%;
  background:
    repeating-radial-gradient(circle at 50% 50%,
      rgba(201,164,98,.055) 0 1px, transparent 1px 74px);
  mask-image:radial-gradient(circle at 50% 50%, #000 0%, #000 46%, transparent 74%);
  opacity:.9;
  pointer-events:none;
}

.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);
  grid-template-rows:auto auto;
  gap:clamp(26px,3.2vw,48px);
  align-items:center;
}
.hero-grid > *{ min-width:0 }
.hero-content{ grid-column:1; grid-row:1; min-width:0 }
.mirror-stage-box{ grid-column:2; grid-row:1; align-self:stretch }

.hero-content{ position:relative; z-index:2; display:flex; flex-direction:column; gap:clamp(20px,2.4vw,30px) }

.hero-eyebrow{
  display:flex; align-items:center; gap:14px;
  font-family:var(--mono); font-size:10.5px; letter-spacing:.26em; text-transform:uppercase;
  color:var(--gold);
}
.hero-eyebrow::before{
  content:""; width:clamp(28px,4vw,56px); height:1px; background:var(--gold); opacity:.7;
}

.hero-content h1{
  font-family:var(--serif);
  font-size:clamp(2.7rem, 6.4vw, 5.6rem);
  line-height:1.02;
  letter-spacing:-.03em;
  font-weight:600;
  color:var(--ink);
}
.hero-content h1 .ln{ display:block; overflow:hidden }
.hero-content h1 .ln > span{
  display:block;
  transform:translateY(110%);
  animation:lineUp 1.1s var(--ease) forwards;
}
.hero-content h1 .ln:nth-child(2) > span{ animation-delay:.12s }
.hero-content h1 em{
  color:var(--gold-2);
  position:relative;
  white-space:nowrap;
}
.hero-content h1 em::after{
  content:"";
  position:absolute; left:0; right:0; bottom:.06em; height:1px;
  background:linear-gradient(90deg, var(--gold), transparent);
  transform:scaleX(0); transform-origin:left;
  animation:ruleIn 1.4s var(--ease) .55s forwards;
}

@keyframes lineUp{ to{ transform:translateY(0) } }
@keyframes ruleIn{ to{ transform:scaleX(1) } }

.hero-lede{
  max-width:31em;
  font-size:clamp(15px,.28vw + 14px,17.5px);
  line-height:1.95;
  color:var(--ink-2);
}
.hero-lede strong{ color:var(--ink); font-weight:600; box-shadow:inset 0 -.42em 0 var(--gold-dim) }

.cta-row{ display:flex; flex-wrap:wrap; gap:10px; align-items:center }

/* 按钮 */
.btn{
  position:relative; overflow:hidden;
  display:inline-flex; align-items:center; gap:10px;
  padding:13px 22px;
  border:1px solid var(--line);
  font-size:13px; letter-spacing:.04em;
  color:var(--ink-2);
  transition:color .35s var(--ease-2), border-color .35s var(--ease-2), transform .35s var(--ease-2);
  will-change:transform;
}
.btn .ar{ transition:transform .35s var(--ease) }
.btn::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:var(--ink); transform:translateY(101%);
  transition:transform .5s var(--ease);
}
.btn:hover{ color:var(--bg); border-color:var(--ink) }
.btn:hover::before{ transform:translateY(0) }
.btn:hover .ar{ transform:translateX(4px) }

.btn.primary{
  border-color:var(--gold);
  color:var(--gold-2);
  background:rgba(201,164,98,.06);
}
.btn.primary::before{ background:var(--gold) }
.btn.primary:hover{ color:#0a0b0c; border-color:var(--gold) }
.btn.cyan{ border-color:rgba(131,182,212,.5); color:var(--ice) }
.btn.cyan::before{ background:var(--ice) }
.btn.cyan:hover{ color:#08090a }

/* 首屏遥测条 */
.telemetry{
  display:flex; flex-wrap:nowrap; align-items:center; gap:0;
  overflow:hidden; white-space:nowrap; max-width:100%;
  border-top:1px solid var(--line-2);
  border-bottom:1px solid var(--line-2);
  padding:14px 0;
  font-family:var(--mono); font-size:10px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-3);
}
.telemetry span{
  display:inline-flex; align-items:center; gap:8px;
  padding:0 clamp(14px,2vw,26px);
  border-right:1px solid var(--line-2);
  white-space:nowrap;
}
.telemetry span:first-child{ padding-left:0 }
.telemetry span:last-child{ border-right:0 }
@media (max-width:1480px){
  .telemetry span:nth-child(5){ display:none }
}
.telemetry b{ color:var(--ink); font-weight:500; letter-spacing:.1em }
.telemetry .dot{
  width:5px; height:5px; border-radius:50%; background:#79d18b;
  box-shadow:0 0 8px #79d18b;
  animation:livePulse 2.4s ease-in-out infinite;
}
@keyframes livePulse{ 0%,100%{opacity:1} 50%{opacity:.25} }

/* 主镜交互提示 */
.mirror-hud-panel{
  display:flex; align-items:center; gap:10px;
  font-family:var(--mono); font-size:10px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--ink-3);
}
.hud-tag{
  display:inline-flex; align-items:center; gap:10px;
  padding:8px 12px;
  border-left:1px solid var(--gold);
  background:linear-gradient(90deg, rgba(201,164,98,.09), transparent);
  line-height:1.5;
}

/* 天球入口卡 */
.portal{
  position:relative;
  grid-column:1 / -1;
  grid-row:2;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.35fr) auto;
  gap:clamp(16px,2.6vw,40px);
  align-items:center;
  align-content:center;
  padding:22px 26px;
  border:1px solid var(--line-2);
  background:linear-gradient(160deg, rgba(21,23,27,.9), rgba(11,12,14,.6));
  overflow:hidden;
  transition:border-color .5s var(--ease-2), transform .5s var(--ease-2), background-color .5s;
}
.portal::after{
  content:"";
  position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(420px 220px at var(--mx,50%) var(--my,0%), rgba(201,164,98,.12), transparent 70%);
  opacity:0; transition:opacity .5s var(--ease-2);
}
.portal:hover{ border-color:rgba(201,164,98,.45); transform:translateY(-3px) }
.portal:hover::after{ opacity:1 }

.portal-sky{
  position:absolute; inset:0; overflow:hidden; pointer-events:none; opacity:.7;
}
.portal-sky .ring{
  position:absolute; left:50%; top:50%;
  transform:translate(-50%,-50%);
  border:1px solid rgba(201,164,98,.16);
  border-radius:50%;
}
.portal-sky .pt{
  position:absolute; border-radius:50%;
  animation:twinkle 3.4s ease-in-out infinite;
  opacity:.8;
}
@keyframes twinkle{ 0%,100%{opacity:.25; transform:scale(.9)} 50%{opacity:.95; transform:scale(1.15)} }

.pl-tag{
  position:relative;
  grid-column:1;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.24em; text-transform:uppercase;
  color:var(--gold); margin-bottom:8px;
}
.portal h3{
  position:relative;
  grid-column:1; align-self:center;
  font-family:var(--serif);
  font-size:clamp(18px,1.35vw,22px);
  line-height:1.4; color:var(--ink); margin:0;
}
.portal p{
  position:relative;
  grid-column:2; grid-row:1 / span 2;
  font-size:13px; line-height:1.85; color:var(--ink-3); max-width:38em;
}
.portal p b{ color:var(--ink-2); font-weight:500 }
.pl-foot{
  position:relative;
  grid-column:3; grid-row:1 / span 2;
  display:flex; flex-direction:column; align-items:flex-end; gap:10px;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-4); text-align:right;
}
.pl-foot .go{ color:var(--gold); display:inline-flex; align-items:center; gap:6px }
.portal:hover .pl-foot .go{ color:var(--gold-2) }

/* 3D 舞台 */
.mirror-stage-box{
  position:relative;
  z-index:2;
  min-height:clamp(420px,58vh,620px);
  border:1px solid var(--line-2);
  background:
    radial-gradient(70% 60% at 50% 42%, rgba(201,164,98,.1), transparent 68%),
    radial-gradient(120% 120% at 50% 120%, rgba(15,17,21,.9), rgba(7,8,9,.2));
  overflow:hidden;
  isolation:isolate;
}
.mirror-stage-box::before{
  content:"";
  position:absolute; inset:0; z-index:0; pointer-events:none;
  background:
    repeating-linear-gradient(to right, rgba(245,242,234,.05) 0 1px, transparent 1px 25%),
    repeating-linear-gradient(to bottom, rgba(245,242,234,.05) 0 1px, transparent 1px 25%);
  mask-image:radial-gradient(60% 60% at 50% 50%, #000, transparent 78%);
  opacity:.5;
}
/* 四角标 */
.mirror-stage-box::after{
  content:"";
  position:absolute; inset:14px; z-index:3; pointer-events:none;
  border:1px solid rgba(245,242,234,.08);
  clip-path:polygon(0 0,32px 0,32px 1px,1px 1px,1px 32px,0 32px,0 0,
                    100% 0,100% 32px,calc(100% - 1px) 32px,calc(100% - 1px) 1px,calc(100% - 32px) 1px,calc(100% - 32px) 0,
                    100% 100%,calc(100% - 32px) 100%,calc(100% - 32px) calc(100% - 1px),calc(100% - 1px) calc(100% - 1px),calc(100% - 1px) calc(100% - 32px),100% calc(100% - 32px),
                    0 100%,0 calc(100% - 32px),1px calc(100% - 32px),1px calc(100% - 1px),32px calc(100% - 1px),32px 100%);
}
#primaryMirror3D{
  position:relative; z-index:1;
  display:block; width:100%; height:100%;
  min-height:inherit;
  cursor:grab;
  touch-action:pan-y;
}
#primaryMirror3D:active{ cursor:grabbing }

.stage-overlay-corner{
  position:absolute; z-index:4;
  left:18px; top:16px;
  display:flex; flex-direction:column; gap:5px;
  pointer-events:none;
  padding:9px 14px 9px 11px;
  background:linear-gradient(90deg, rgba(7,8,9,.92) 0%, rgba(7,8,9,.72) 62%, rgba(7,8,9,0) 100%);
}
.stage-badge{
  font-family:var(--mono); font-size:9.5px; letter-spacing:.26em; text-transform:uppercase;
  color:var(--gold);
  display:inline-flex; align-items:center; gap:8px;
}
.stage-badge::before{
  content:""; width:6px; height:6px; background:var(--gold);
  box-shadow:0 0 10px var(--gold);
  animation:livePulse 2.6s ease-in-out infinite;
}
.stage-sub{
  font-family:var(--mono); font-size:9px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink-4);
}

/* 拖拽提示 */
.stage-hint{
  position:absolute; z-index:4; left:26px; bottom:22px; right:26px;
  display:flex; align-items:center; justify-content:space-between;
  font-family:var(--mono); font-size:9px; letter-spacing:.2em; text-transform:uppercase;
  color:var(--ink-4);
  pointer-events:none;
  opacity:1; transition:opacity .6s var(--ease-2);
}
.stage-hint.hide{ opacity:0 }
.stage-hint .drag{ display:inline-flex; align-items:center; gap:8px; color:var(--ink-3) }
.stage-hint .drag svg{ opacity:.6 }

/* 滚动提示 */
.scroll-cue{
  position:absolute; left:var(--gut); bottom:26px; z-index:3;
  display:none; align-items:center; gap:12px;
  font-family:var(--mono); font-size:9px; letter-spacing:.26em; text-transform:uppercase;
  color:var(--ink-4);
}
.scroll-cue i{
  position:relative; display:block; width:1px; height:44px;
  background:var(--line);
  overflow:hidden;
}
.scroll-cue i::after{
  content:""; position:absolute; inset:0 0 auto 0; height:40%;
  background:var(--gold);
  animation:cueSlide 2.6s var(--ease-2) infinite;
}
@keyframes cueSlide{ 0%{transform:translateY(-100%)} 60%,100%{transform:translateY(260%)} }

/* ---------- 数据跑马灯 ---------- */
.ticker{
  position:relative; z-index:2;
  border-top:1px solid var(--line-2);
  border-bottom:1px solid var(--line-2);
  overflow:hidden;
  background:rgba(10,11,13,.6);
}
.ticker-track{
  display:flex; align-items:center; gap:0; width:max-content;
  padding:13px 0;
  animation:tickerMove 42s linear infinite;
  will-change:transform;
}
.ticker:hover .ticker-track{ animation-play-state:paused }
.ticker-item{
  display:inline-flex; align-items:baseline; gap:10px;
  padding:0 26px;
  border-right:1px solid var(--line-2);
  font-family:var(--mono); font-size:10.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink-3); white-space:nowrap;
}
.ticker-item b{ color:var(--ink); font-size:12px; letter-spacing:.1em; font-weight:500 }
.ticker-item .u{ color:var(--gold); font-size:9.5px }
@keyframes tickerMove{ from{transform:translateX(0)} to{transform:translateX(-50%)} }

/* ---------- 章节导轨 ---------- */
.chapter-rail{
  position:fixed; left:26px; top:50%; transform:translateY(-50%);
  z-index:50;
  display:none;
  flex-direction:column; gap:2px;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; text-transform:uppercase;
}
.chapter-rail a{
  display:flex; align-items:center; gap:10px;
  padding:7px 0; color:var(--ink-4);
  transition:color .35s var(--ease-2);
}
.chapter-rail a::before{
  content:""; width:14px; height:1px; background:currentColor; opacity:.5;
  transition:width .35s var(--ease), opacity .35s;
}
.chapter-rail a .n{ width:16px }
.chapter-rail a.on{ color:var(--gold) }
.chapter-rail a.on::before{ width:28px; opacity:1 }
.chapter-rail a:hover{ color:var(--ink-2) }

/* ---------- 章节 ---------- */
.ch{
  position:relative;
  z-index:2;
  isolation:isolate;
  overflow:clip;
  padding-block:clamp(54px,7.2vh,96px);
  border-top:1px solid var(--line-2);
  counter-increment:ch;
}
.ch::before{
  content:"";
  position:absolute; inset:0; z-index:-1; pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg, rgba(246,243,236,.045) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(90deg, rgba(246,243,236,.03) 0 1px, transparent 1px 84px);
  -webkit-mask-image:radial-gradient(130% 96% at 50% 38%, #000 22%, transparent 76%);
  mask-image:radial-gradient(130% 96% at 50% 38%, #000 22%, transparent 76%);
}
.ch::after{
  content:"";
  position:absolute; z-index:-1; pointer-events:none;
  right:-12%; top:-18%; width:62%; height:72%;
  background:radial-gradient(closest-side, rgba(201,164,98,.075), rgba(131,182,212,.028) 55%, transparent 74%);
}
.ch-head{
  position:relative;
  display:grid;
  grid-template-columns:auto minmax(0,1.75fr) minmax(0,1fr);
  gap:clamp(16px,3vw,48px);
  align-items:end;
  padding-bottom:clamp(26px,3.4vw,42px);
  margin-bottom:clamp(28px,3.6vw,46px);
  border-bottom:1px solid var(--line-2);
}
.ch-head::after{
  content:"";
  position:absolute; z-index:-1; pointer-events:none;
  left:calc(50% - 50vw); width:100vw;
  top:calc(-1 * clamp(54px,7.2vh,96px));
  height:clamp(330px,44vh,480px);
  background-image:
    linear-gradient(180deg, rgba(7,8,9,.28) 0%, rgba(7,8,9,.62) 40%, rgba(7,8,9,.90) 66%, var(--bg) 92%),
    var(--plate, none);
  background-size:cover;
  background-position:center 32%;
  filter:saturate(.78) contrast(1.1) brightness(1.08);
  -webkit-mask-image:linear-gradient(180deg,#000 0%, #000 56%, transparent 96%);
  mask-image:linear-gradient(180deg,#000 0%, #000 56%, transparent 96%);
}
#c1{--plate:url("img/smacs.jpg")}
#c2{--plate:url("img/jades.jpg")}
#c3{--plate:url("img/hubble_deep_field.jpg")}
#c4{--plate:url("img/k2_18b.jpg")}
#c5{--plate:url("img/carina.jpg")}
#c6{--plate:url("img/cartwheel.jpg")}

.ch-head::before{
  content:"0" counter(ch);
  grid-column:1;
  align-self:end;
  padding-bottom:.18em;
  font-family:var(--mono);
  font-size:clamp(30px,3.5vw,46px);
  line-height:.9; letter-spacing:.01em; font-weight:300;
  color:transparent;
  -webkit-text-stroke:1px rgba(201,164,98,.55);
  opacity:.95;
}
.ch-head h2{
  font-family:var(--serif);
  text-shadow:0 2px 26px rgba(4,5,7,.72);
  font-size:clamp(1.65rem, 3.1vw, 2.9rem);
  line-height:1.28;
  letter-spacing:-.02em;
  font-weight:600;
}
.ch-head h2 em{
  color:var(--gold-2);
  position:relative;
  white-space:nowrap;
}
.ch-sub{
  position:relative;
  font-size:14.5px; line-height:1.95; color:var(--ink-3);
  max-width:36em;
  padding-top:20px;
  border-top:1px solid var(--line-2);
}
.ch-sub::before{
  content:"提要 · ABSTRACT";
  display:block;
  margin:0 0 9px;
  font-family:var(--mono); font-size:8.5px; letter-spacing:.26em;
  color:rgba(201,164,98,.62);
}
.ch-sub b{ color:var(--ink-2); font-weight:500; box-shadow:inset 0 -.45em 0 rgba(201,164,98,.14) }

/* ---------- 三栏矩阵 ---------- */
.matrix{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  border:1px solid var(--line-2);
  background:linear-gradient(180deg, rgba(246,243,236,.022), rgba(246,243,236,0) 34%);
}
.matrix.c2{ grid-template-columns:repeat(2,minmax(0,1fr)) }
.cell{
  position:relative;
  padding:clamp(24px,3vw,38px) clamp(20px,2.4vw,34px) clamp(26px,3vw,40px);
  border-bottom:1px solid var(--line-2);
  border-right:1px solid var(--line-2);
  overflow:hidden;
  transition:background-color .5s var(--ease-2);
}
.matrix > .cell:nth-child(3n){ border-right:0 }
.matrix.c2 > .cell:nth-child(2n){ border-right:0 }
.cell::before{
  content:"";
  position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(340px 240px at var(--mx,50%) var(--my,0%), rgba(201,164,98,.09), transparent 68%);
  opacity:0; transition:opacity .5s var(--ease-2);
}
.cell:hover{ background-color:rgba(201,164,98,.026); box-shadow:inset 0 1px 0 rgba(201,164,98,.5) }
.cell:hover::before{ opacity:1 }
.cell::after{
  content:"";
  position:absolute; left:0; top:0; bottom:0; width:1px;
  background:var(--gold); transform:scaleY(0); transform-origin:top;
  transition:transform .6s var(--ease);
}
.cell:hover::after{ transform:scaleY(1) }

.idx{
  display:block;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--ink-4);
  margin-bottom:clamp(16px,2vw,24px);
  transition:color .4s var(--ease-2);
}
.cell:hover .idx{ color:var(--gold) }
.cell h3{
  font-family:var(--serif);
  font-size:clamp(18px,1.35vw,22px);
  line-height:1.42;
  letter-spacing:-.01em;
  margin-bottom:12px;
  color:var(--ink);
}
.cell p{
  font-size:13.8px; line-height:1.92; color:var(--ink-3);
}
.cell p b{ color:var(--ink-2); font-weight:600 }
.foot{
  display:inline-block;
  margin-top:20px; padding-left:11px;
  border-left:1px solid rgba(201,164,98,.45);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.08em; line-height:1.7;
  color:var(--ink-4);
}


/* ---------- 章节图版 ---------- */
.ch-figure{
  margin:clamp(34px,4.4vw,58px) 0 0;
  border:1px solid var(--line-2);
  background:#05060a;
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);
  overflow:hidden;
}
.ch-figure img{
  display:block; width:100%; height:clamp(250px,32vw,380px);
  object-fit:cover;
  filter:saturate(.92) contrast(1.03);
  transition:transform 1.2s var(--ease-2);
}
.ch-figure:hover img{ transform:scale(1.025) }
.ch-figure figcaption{
  padding:clamp(22px,2.4vw,34px);
  border-left:1px solid var(--line-2);
  display:flex; flex-direction:column; justify-content:space-between; gap:18px;
  background:linear-gradient(180deg, rgba(246,243,236,.02), transparent 60%);
}
.fg-idx{
  font-family:var(--mono); font-size:9px; letter-spacing:.24em;
  color:rgba(201,164,98,.75); text-transform:uppercase;
}
.fg-txt{ font-size:13.6px; line-height:1.9; color:var(--ink-3); }
.fg-txt b{
  display:block; margin-bottom:10px;
  font-family:var(--serif); font-size:clamp(17px,1.35vw,20px);
  line-height:1.5; font-weight:600; color:var(--ink);
}
.fg-src{
  font-family:var(--mono); font-size:8.5px; letter-spacing:.14em;
  color:var(--ink-4); text-transform:uppercase;
}
@media (max-width:880px){
  .ch-figure{ grid-template-columns:1fr }
  .ch-figure figcaption{ border-left:0; border-top:1px solid var(--line-2) }
  .ch-figure img{ height:clamp(200px,46vw,300px) }
}

/* ---------- 引文 ---------- */
.pull{
  position:relative;
  margin-block:clamp(34px,4.4vw,60px);
  padding:clamp(18px,2.2vw,26px) clamp(20px,3vw,34px) clamp(18px,2.2vw,26px) clamp(22px,3vw,44px);
  border-left:1px solid var(--gold);
  max-width:44em;
  background:linear-gradient(90deg, rgba(201,164,98,.05), rgba(201,164,98,.012) 46%, transparent 78%);
}
.pull::after{
  content:"\201D";
  position:absolute; right:6px; top:-38px;
  font-family:var(--serif); font-size:clamp(72px,7vw,108px); line-height:1;
  color:rgba(201,164,98,.10);
  pointer-events:none;
}
.pull p{
  font-family:var(--serif);
  font-size:clamp(1.18rem,1.9vw,1.7rem);
  line-height:1.7;
  letter-spacing:-.01em;
  color:var(--ink);
  text-wrap:balance;
}
.pull cite{
  display:block; margin-top:14px;
  font-family:var(--mono); font-style:normal; font-size:9.5px;
  letter-spacing:.2em; text-transform:uppercase; color:var(--ink-4);
}

/* ---------- 数值面板 ---------- */
.metrics{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  margin-block:clamp(28px,4vw,48px);
}
.metric{
  position:relative;
  padding:clamp(24px,3vw,36px) clamp(14px,2vw,26px);
  border-right:1px solid var(--line-2);
}
.metric:last-child{ border-right:0 }
.metric::after{
  content:""; position:absolute; left:0; right:0; bottom:-1px; height:1px;
  background:var(--gold); transform:scaleX(0); transform-origin:left;
  transition:transform .8s var(--ease);
}
.metric:hover::after{ transform:scaleX(1) }
.metric .num{
  font-family:var(--serif);
  font-size:clamp(2.1rem,3.6vw,3.4rem);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--ink);
  display:flex; align-items:baseline; gap:4px;
  font-variant-numeric:tabular-nums;
}
.metric .num .u{
  font-family:var(--mono); font-size:11px; letter-spacing:.1em;
  color:var(--gold); text-transform:none;
  margin-left:4px;
}
.metric .cap{
  margin-top:14px;
  font-size:12.5px; line-height:1.7; color:var(--ink-3);
}
.metric .cap::first-line{ color:var(--ink-2) }
.metric .num.c1{ color:var(--ec1,var(--gold-2)) }
.metric .num.c2{ color:var(--ec2,var(--ink)) }
.metric .num.c3{ color:var(--ec3,var(--ice)) }
.metric .num.c4{ color:var(--ec4,var(--ink)) }

/* ---------- 比例条 ---------- */
.ratios{ display:flex; flex-direction:column; gap:clamp(18px,2.4vw,28px); margin-block:clamp(30px,4vw,50px) }
.ratio{ display:flex; flex-direction:column; gap:10px }
.ratio .top{
  display:flex; align-items:baseline; justify-content:space-between; gap:16px;
  font-size:13.5px; color:var(--ink-2);
}
.ratio .nm span{
  font-family:var(--mono); font-size:9px; letter-spacing:.2em; color:var(--ink-4);
  margin-left:10px; text-transform:uppercase;
}
.ratio .vl{
  font-family:var(--mono); font-size:10px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--gold); white-space:nowrap;
}
.ratio .track{
  position:relative;
  height:2px;
  background:var(--line-2);
  overflow:hidden;
}
.ratio .track i{
  display:block; height:100%; width:0;
  transition:width 1.5s var(--ease);
  background:linear-gradient(90deg, var(--gold-dim), var(--gold));
}
.ratio .track i.g2{ background:linear-gradient(90deg, var(--ice-dim), var(--ice)) }
.ratio .track i.g3{ background:linear-gradient(90deg, rgba(207,122,92,.16), var(--warn)) }
.ratio .note{
  font-family:var(--mono); font-size:10px; letter-spacing:.04em; color:var(--ink-4);
}

/* ---------- 交互实验室 ---------- */
.lab-box{
  position:relative;
  margin-block:clamp(28px,3.6vw,44px);
  border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(17,19,23,.85), rgba(9,10,12,.9));
  overflow:hidden;
}
.lab-box::before{
  content:"";
  position:absolute; inset:0; pointer-events:none;
  background:repeating-linear-gradient(to right, rgba(245,242,234,.03) 0 1px, transparent 1px 8.3333%);
  mask-image:linear-gradient(to bottom, #000, transparent 40%);
  opacity:.6;
}
.lab-head{
  position:relative;
  display:flex; align-items:flex-start; justify-content:space-between; gap:24px;
  padding:clamp(20px,2.4vw,28px) clamp(20px,2.6vw,32px);
  border-bottom:1px solid var(--line-2);
  flex-wrap:wrap;
}
.lh-tag{
  display:block;
  font-family:var(--mono); font-size:9px; letter-spacing:.24em; text-transform:uppercase;
  color:var(--gold); margin-bottom:10px;
}
.lab-head h3{
  font-family:var(--sans);
  font-size:clamp(15px,1.25vw,17.5px);
  font-weight:600; line-height:1.6;
  letter-spacing:0; color:var(--ink);
  max-width:42em;
}
.lab-btns{ display:flex; flex-wrap:wrap; gap:8px }
.lab-btn{
  position:relative; overflow:hidden;
  display:inline-flex; align-items:center; gap:8px;
  padding:9px 14px;
  border:1px solid var(--line);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--ink-2);
  transition:color .3s var(--ease-2), border-color .3s var(--ease-2), background-color .3s;
}
.lab-btn:hover{ color:var(--ink); border-color:rgba(245,242,234,.35); background:rgba(245,242,234,.04) }
.lab-btn.on, .lab-btn.primary:hover{
  color:#0a0b0c; background:var(--gold); border-color:var(--gold);
}
.lab-btn.on:hover{ background:var(--gold-2); border-color:var(--gold-2) }
.lab-btn.cyan{ border-color:rgba(131,182,212,.45); color:var(--ice) }
.lab-btn.cyan:hover{ background:rgba(131,182,212,.12); color:var(--ice) }

/* 实验区通用画布框 */
.mirror-grid{
  display:grid; grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:0;
}
.mirror-stage{
  position:relative;
  padding:clamp(16px,2vw,26px);
  border-right:1px solid var(--line-2);
  min-height:320px;
  display:flex; align-items:center;
}
#mirrorCanvas{
  display:block; width:100%; height:auto;
  cursor:crosshair;
  background:radial-gradient(60% 60% at 50% 50%, rgba(201,164,98,.06), transparent 70%);
}
.mirror-info{
  display:flex; flex-direction:column; gap:18px;
  padding:clamp(18px,2.4vw,28px);
}
.mi-stat{ display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:1px; background:var(--line-2) }
.mi-card{
  display:flex; flex-direction:column; gap:6px;
  padding:12px 14px; background:rgba(11,12,14,.9);
}
.mi-card .k{
  font-family:var(--mono); font-size:8.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink-4);
}
.mi-card .v{
  font-family:var(--mono); font-size:13px; letter-spacing:.04em; color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.mi-card .v.c{ color:var(--gold) }
.mi-desc{ font-size:13px; line-height:1.9; color:var(--ink-3) }
.mi-desc b{ color:var(--ink-2) }

/* 多波段 */
.band-grid{ display:grid; grid-template-columns:minmax(0,1.3fr) minmax(0,1fr) }
.band-viewport{
  position:relative;
  padding:clamp(16px,2vw,24px);
  border-right:1px solid var(--line-2);
}
#bandCanvas{ display:block; width:100%; height:auto; background:#05060a }
.band-controls{
  display:flex; flex-direction:column; gap:20px;
  padding:clamp(18px,2.4vw,26px);
}
.sec-label{
  display:block;
  font-family:var(--mono); font-size:8.5px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--ink-4); margin-bottom:10px;
}
.slider-group{ display:flex; flex-direction:column; gap:14px }
.slider-group label{
  display:flex; justify-content:space-between; gap:12px;
  font-size:11.5px; line-height:1.6; color:var(--ink-3); margin-bottom:7px;
}
.slider-group label b{
  font-family:var(--mono); font-size:10px; color:var(--gold); white-space:nowrap; font-weight:500;
}
input[type="range"]{
  -webkit-appearance:none; appearance:none;
  width:100%; height:2px; background:var(--line); outline:none; cursor:pointer;
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none;
  width:11px; height:11px; border-radius:50%;
  background:var(--gold); border:2px solid #0b0c0e;
  box-shadow:0 0 0 1px var(--gold), 0 0 12px rgba(201,164,98,.5);
  transition:transform .2s var(--ease-2);
}
input[type="range"]:hover::-webkit-slider-thumb{ transform:scale(1.2) }
input[type="range"]:focus-visible{ outline:2px solid var(--gold); outline-offset:3px }
input[type="range"]::-moz-range-thumb{
  width:11px; height:11px; border-radius:50%; border:2px solid #0b0c0e;
  background:var(--gold); box-shadow:0 0 0 1px var(--gold);
}
.band-meta-title{
  font-family:var(--sans); font-size:13.5px; font-weight:600; color:var(--ink);
  margin-bottom:8px;
}
.band-meta-desc{ font-size:12.5px; line-height:1.85; color:var(--ink-3) }

/* 光谱 */
.spec-viewport{
  position:relative;
  padding:clamp(14px,1.8vw,22px) clamp(14px,2vw,24px) 0;
}
#specCanvas{ display:block; width:100%; height:auto; cursor:crosshair }
.spec-bar{
  display:flex; align-items:center; justify-content:space-between; gap:18px;
  padding:14px clamp(16px,2vw,24px) clamp(16px,2vw,24px);
  flex-wrap:wrap;
}
.spec-readout-txt{
  font-family:var(--mono); font-size:10px; letter-spacing:.12em;
  color:var(--ink-3);
}

/* ---------- 参数表 ---------- */
.specs-table{ display:flex; flex-direction:column }
.spec-row{
  display:grid;
  grid-template-columns:minmax(120px,.9fr) minmax(0,2.6fr) minmax(90px,.7fr);
  gap:clamp(12px,2vw,28px);
  align-items:baseline;
  padding:clamp(15px,1.8vw,20px) 0;
  border-bottom:1px solid var(--line-2);
  transition:background-color .4s var(--ease-2), padding-left .4s var(--ease-2);
}
.spec-row:hover{ background:rgba(245,242,234,.022); padding-left:10px }
.spec-row dt{
  font-size:13px; color:var(--ink); letter-spacing:.02em;
  font-weight:500;
}
.spec-row dd{ font-size:12.8px; line-height:1.8; color:var(--ink-3) }
.spec-row .v{
  font-family:var(--mono); font-size:12px; letter-spacing:.04em;
  color:var(--gold); text-align:right; white-space:nowrap;
  font-variant-numeric:tabular-nums;
}

/* ---------- 结尾 ---------- */
.outro{
  position:relative; z-index:2;
  border-top:1px solid var(--line);
  padding-block:clamp(60px,9vh,110px);
  background:
    radial-gradient(70% 120% at 22% 0%, rgba(201,164,98,.09), transparent 60%);
}
.outro-in{
  display:flex; align-items:center; justify-content:space-between; gap:clamp(24px,4vw,60px);
  flex-wrap:wrap;
  max-width:var(--max); margin-inline:auto;
  padding-inline:var(--gut);
}
.outro h3{
  font-family:var(--serif);
  font-size:clamp(1.5rem,2.9vw,2.5rem);
  line-height:1.32; letter-spacing:-.02em;
  margin-bottom:14px;
}
.outro p{ font-size:13.5px; line-height:1.85; color:var(--ink-3); max-width:34em }

/* ---------- 页脚 ---------- */
footer.site{
  position:relative; z-index:2;
  padding:clamp(44px,6vw,72px) var(--gut) 28px;
  border-top:1px solid var(--line-2);
  background:#050608;
}
.f-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr;
  gap:clamp(24px,4vw,60px);
  max-width:var(--max); margin-inline:auto;
  padding-inline:var(--gut);
  box-sizing:content-box;
}
.f-grid h5{
  font-family:var(--mono); font-size:9px; letter-spacing:.24em; text-transform:uppercase;
  color:var(--gold); margin-bottom:16px; font-weight:500;
}
.f-grid p{ font-size:12.5px; line-height:1.9; color:var(--ink-3) }
.f-list{ list-style:none; display:flex; flex-direction:column; gap:9px }
.f-list li{ font-size:12.5px; line-height:1.7; color:var(--ink-3) }
.f-list a{ color:var(--ink-2); transition:color .3s }
.f-list a:hover{ color:var(--gold) }
.f-base{
  display:flex; align-items:center; justify-content:space-between;
  max-width:var(--max); margin:clamp(28px,4vw,44px) auto 0;
  padding:18px var(--gut) 0; border-top:1px solid var(--line-2);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.2em; text-transform:uppercase;
  color:var(--ink-4);
}

/* ---------- 吐司 ---------- */
#dfToast{
  position:fixed; left:50%; bottom:28px; z-index:120;
  transform:translate(-50%,20px);
  padding:11px 20px;
  background:rgba(17,19,23,.95);
  border:1px solid var(--line);
  font-family:var(--mono); font-size:10.5px; letter-spacing:.12em;
  color:var(--ink-2);
  opacity:0; pointer-events:none;
  transition:opacity .4s var(--ease-2), transform .4s var(--ease);
  backdrop-filter:blur(12px);
}
#dfToast.show{ opacity:1; transform:translate(-50%,0) }

/* ---------- 图鉴模态 ---------- */
.gallery-modal{
  position:fixed; inset:0; z-index:200;
  display:flex; flex-direction:column;
  background:
    radial-gradient(120% 70% at 50% -12%, rgba(201,164,98,.075), transparent 58%),
    #06070a;
  opacity:0; visibility:hidden;
  transition:opacity .45s var(--ease-2), visibility .45s;
}
.gallery-modal.show{ opacity:1; visibility:visible }

/* ---------- 头部 ---------- */
.gm-head{
  position:relative; z-index:3;
  display:grid; grid-template-columns:minmax(0,1fr) auto; align-items:end;
  gap:clamp(16px,3vw,44px);
  padding:clamp(22px,3.2vw,36px) var(--gut) clamp(16px,2vw,22px);
  border-bottom:1px solid var(--line-2);
  transform:translateY(-12px); opacity:0;
  transition:transform .55s var(--ease), opacity .45s var(--ease-2);
}
.gallery-modal.show .gm-head{ transform:none; opacity:1 }
.gm-title::before{
  content:"ARCHIVE ／ 深空图鉴";
  display:block; margin-bottom:10px;
  font-family:var(--mono); font-size:8.5px; letter-spacing:.28em;
  color:rgba(201,164,98,.66);
}
.gm-title h3{
  font-family:var(--serif);
  font-size:clamp(21px,2.5vw,32px); line-height:1.22; letter-spacing:-.012em;
}
#gmCountLbl{
  display:inline-block; margin-top:11px;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--gold);
}
.gm-controls{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:flex-end }

/* 搜索：带放大镜的背景图，不引入外部资源 */
.gm-search{
  width:clamp(180px,22vw,280px);
  padding:10px 14px 10px 36px;
  background-color:rgba(245,242,234,.035);
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Ccircle cx='6' cy='6' r='4.4' fill='none' stroke='%238f8b82' stroke-width='1.1'/%3E%3Cpath d='M9.2 9.2 12.5 12.5' stroke='%238f8b82' stroke-width='1.1'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:13px 50%;
  border:1px solid var(--line);
  color:var(--ink); font-family:var(--sans); font-size:12.5px;
  outline:none; transition:border-color .3s, background-color .3s;
}
.gm-search:focus{ border-color:var(--gold); background-color:rgba(201,164,98,.05) }
.gm-search:focus-visible{ outline:2px solid var(--gold); outline-offset:3px }
.gm-search::placeholder{ color:var(--ink-4) }

/* 筛选：文字胶囊，选中项金色描边 + 底部短线 */
.gm-filters{ display:flex; gap:4px; flex-wrap:wrap }
.gm-filters button{
  position:relative; padding:9px 11px;
  font-family:var(--mono); font-size:9px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-3); border:1px solid transparent;
  transition:color .25s, border-color .25s;
}
.gm-filters button:hover{ color:var(--ink); border-color:var(--line-2) }
.gm-filters button.on{ color:var(--gold); border-color:rgba(201,164,98,.4) }
.gm-filters button.on::after{
  content:""; position:absolute; left:11px; right:11px; bottom:4px; height:1px;
  background:var(--gold); opacity:.8;
}

.gm-close{
  width:38px; height:38px; flex:0 0 auto;
  display:grid; place-items:center;
  border:1px solid var(--line);
  color:var(--ink-2); font-size:18px; line-height:1;
  transition:all .3s var(--ease-2);
}
.gm-close:hover{ background:var(--gold); border-color:var(--gold); color:#0a0b0c; transform:rotate(90deg) }

/* ---------- 网格 ---------- */
.gm-body{
  flex:1; overflow-y:auto; overscroll-behavior:contain;
  padding:clamp(20px,2.8vw,36px) var(--gut) clamp(50px,7vw,84px);
  scrollbar-width:thin; scrollbar-color:rgba(201,164,98,.35) transparent;
}
.gm-body::-webkit-scrollbar{ width:8px }
.gm-body::-webkit-scrollbar-thumb{ background:rgba(201,164,98,.3); border-radius:8px }
.gm-body::-webkit-scrollbar-track{ background:transparent }

.gm-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(216px,1fr));
  grid-auto-flow:dense;
  grid-auto-rows:clamp(150px,12.6vw,204px);
  gap:clamp(8px,1vw,14px);
}
.gm-card{
  position:relative;
  height:100%;
  text-align:left;
  overflow:hidden;
  cursor:pointer;
  background:#0a0b0d;
  isolation:isolate;
  opacity:0; transform:translateY(14px);
}
.gallery-modal.show .gm-card{ animation:gmIn .6s var(--ease) forwards }
.gm-card:nth-child(1){ animation-delay:.02s } .gm-card:nth-child(2){ animation-delay:.05s }
.gm-card:nth-child(3){ animation-delay:.08s } .gm-card:nth-child(4){ animation-delay:.11s }
.gm-card:nth-child(5){ animation-delay:.14s } .gm-card:nth-child(6){ animation-delay:.17s }
.gm-card:nth-child(7){ animation-delay:.20s } .gm-card:nth-child(8){ animation-delay:.23s }
.gm-card:nth-child(9){ animation-delay:.26s } .gm-card:nth-child(10){ animation-delay:.29s }
.gm-card:nth-child(11){ animation-delay:.32s } .gm-card:nth-child(12){ animation-delay:.35s }
.gm-card:nth-child(n+13){ animation-delay:.38s }
@keyframes gmIn{ to{ opacity:1; transform:none } }

/* 每 9 张第一张做成横向大图，破掉网格的单调 */
.gm-card:nth-child(9n+1){ grid-column:span 2; grid-row:span 2 }

.gm-thumb{ position:absolute; inset:0 }
.gm-thumb img{
  width:100%; height:100%; object-fit:cover;
  transform:scale(1.001);
  transition:transform .9s var(--ease), filter .5s var(--ease-2);
  filter:saturate(.9) brightness(.9);
}
.gm-card:hover .gm-thumb img{ transform:scale(1.06); filter:saturate(1.04) brightness(1.02) }

/* 金色细线扫过 */
.gm-card::after{
  content:""; position:absolute; inset:0; z-index:2; pointer-events:none;
  background:linear-gradient(115deg, transparent 38%, rgba(238,214,156,.22) 50%, transparent 62%);
  transform:translateX(-120%);
  transition:transform .9s var(--ease);
}
.gm-card:hover::after{ transform:translateX(120%) }

.gm-badge{
  position:absolute; left:10px; top:10px; z-index:3;
  padding:4px 8px;
  font-family:var(--mono); font-size:8px; letter-spacing:.16em; text-transform:uppercase;
  background:rgba(5,6,8,.82); color:var(--gold);
  border:1px solid rgba(201,164,98,.3);
}

/* 信息层压在图片底部，避免"图 + 白框"的呆板结构 */
.gm-info{
  position:absolute; left:0; right:0; bottom:0; z-index:3;
  display:flex; flex-direction:column; gap:6px;
  padding:34px 14px 12px;
  background:linear-gradient(180deg, transparent, rgba(4,5,7,.72) 42%, rgba(4,5,7,.94));
  transform:translateY(6px);
  transition:transform .5s var(--ease);
}
.gm-card:hover .gm-info{ transform:none }
.gm-zh{ font-size:13.5px; color:var(--ink); line-height:1.45 }
.gm-en{
  font-family:var(--mono); font-size:9px; letter-spacing:.1em;
  color:rgba(246,243,236,.5); text-transform:uppercase;
}
.gm-meta{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  margin-top:4px; padding-top:8px;
  border-top:1px solid rgba(245,242,234,.12);
  font-family:var(--mono); font-size:8.5px; letter-spacing:.12em; text-transform:uppercase;
  color:rgba(246,243,236,.42);
  opacity:0; max-height:0; overflow:hidden;
  transition:opacity .4s var(--ease-2), max-height .4s var(--ease-2);
}
.gm-card:hover .gm-meta{ opacity:1; max-height:40px }
.gm-card:hover .gm-meta span:last-child{ color:var(--gold) }

/* 空状态 */
.gm-empty{
  grid-column:1/-1;
  padding:clamp(50px,10vw,110px) 0;
  text-align:center;
  font-family:var(--serif); font-size:16px; color:var(--ink-3);
}
.gm-empty span{ display:block; margin-top:10px; font-family:var(--mono); font-size:9px; letter-spacing:.24em; color:var(--ink-4); text-transform:uppercase }

@media (max-width:700px){
  .gm-grid{ grid-template-columns:repeat(auto-fill,minmax(148px,1fr)); gap:6px; grid-auto-rows:clamp(120px,30vw,150px) }
  .gm-card:nth-child(9n+1){ grid-column:span 2; grid-row:span 2 }
  .gm-info{ padding:26px 10px 9px }
  .gm-zh{ font-size:12px }
  .gm-head{ grid-template-columns:1fr; gap:12px; padding:20px 16px 14px; padding-right:58px }
  .gm-title::before{ display:none }
  .gm-title h3{ font-size:20px }
  .gm-close{ position:absolute; top:16px; right:16px }
  .gm-controls{ width:100%; justify-content:flex-start; gap:8px }
  .gm-search{ width:100% }
  .gm-filters{ flex-wrap:nowrap; overflow-x:auto; width:100%; padding-bottom:2px; scrollbar-width:none }
  .gm-filters::-webkit-scrollbar{ display:none }
  .gm-filters button{ flex:0 0 auto }
}
@media (prefers-reduced-motion:reduce){
  .gm-card, .gallery-modal.show .gm-card{ animation:none; opacity:1; transform:none }
  .gm-card::after{ display:none }
}

/* ---------- 新增 UI：指针光圈 / 回到顶部 ---------- */
.cursor-ring{
  position:fixed; left:0; top:0; z-index:150;
  width:26px; height:26px; margin:-13px 0 0 -13px;
  border:1px solid rgba(201,164,98,.55);
  border-radius:50%;
  pointer-events:none;
  opacity:0;
  transition:opacity .3s, width .35s var(--ease), height .35s var(--ease), margin .35s var(--ease), background-color .35s;
  mix-blend-mode:screen;
  display:none;
}
.cursor-ring.on{ opacity:1 }
.cursor-ring.hot{
  width:52px; height:52px; margin:-26px 0 0 -26px;
  background:rgba(201,164,98,.09);
  border-color:rgba(201,164,98,.9);
}
@media (hover:hover) and (pointer:fine){
  .cursor-ring{ display:block }
}

.to-top{
  position:fixed; right:clamp(16px,3vw,34px); bottom:clamp(16px,3vw,34px); z-index:90;
  width:44px; height:44px;
  display:grid; place-items:center;
  border:1px solid var(--line);
  background:rgba(10,11,13,.8);
  backdrop-filter:blur(10px);
  color:var(--ink-2);
  opacity:0; transform:translateY(12px); pointer-events:none;
  transition:opacity .4s var(--ease-2), transform .4s var(--ease), background-color .3s, color .3s;
}
.to-top.show{ opacity:1; transform:none; pointer-events:auto }
.to-top:hover{ background:var(--gold); border-color:var(--gold); color:#0a0b0c }

/* ---------- 揭示动画 ---------- */
.rv{
  opacity:0;
  transform:translate3d(0,26px,0);
  transition:opacity .95s var(--ease), transform 1.1s var(--ease);
}
.rv.in{ opacity:1; transform:none }
/* 子项错峰 */
.matrix.in .cell,
.metrics.in .metric,
.ratios.in .ratio{
  animation:cellIn .9s var(--ease) both;
}
.matrix.in .cell:nth-child(2), .metrics.in .metric:nth-child(2), .ratios.in .ratio:nth-child(2){ animation-delay:.09s }
.matrix.in .cell:nth-child(3), .metrics.in .metric:nth-child(3), .ratios.in .ratio:nth-child(3){ animation-delay:.18s }
.matrix.in .cell:nth-child(4), .metrics.in .metric:nth-child(4){ animation-delay:.27s }
.matrix.in .cell:nth-child(5){ animation-delay:.36s }
.matrix.in .cell:nth-child(6){ animation-delay:.45s }
@keyframes cellIn{
  from{ opacity:0; transform:translateY(18px) }
  to{ opacity:1; transform:none }
}

/* ---------- 响应式 ---------- */
@media (min-width:1600px){
  .chapter-rail{ display:flex }
}

@media (max-width:1180px){
  .hero-grid{ grid-template-columns:1fr; grid-template-rows:auto; gap:clamp(22px,4vw,34px) }
  .hero-grid > *{ min-width:0 }
.hero-content{ grid-column:1; grid-row:1; min-width:0 }
  .mirror-stage-box{ grid-column:1; grid-row:2; min-height:clamp(360px,56vh,520px) }
  .portal{ grid-column:1; grid-row:3; display:block; padding:20px 20px 18px }
  .pl-tag, .portal h3, .portal p, .pl-foot{ grid-column:auto; grid-row:auto }
  .portal h3{ margin-bottom:10px }
  .portal p{ margin-bottom:14px }
  .pl-foot{ flex-direction:row; align-items:center; justify-content:space-between; text-align:left }
  .ch::before{ top:clamp(60px,9vh,110px) }
}

@media (max-width:1020px){
  .ch-head{ grid-template-columns:1fr; gap:18px; align-items:start }
  .metrics{ grid-template-columns:repeat(2,minmax(0,1fr)) }
  .metric:nth-child(2n){ border-right:0 }
  .metric:nth-child(1), .metric:nth-child(2){ border-bottom:1px solid var(--line-2) }
  .matrix{ grid-template-columns:repeat(2,minmax(0,1fr)) }
  .matrix > .cell:nth-child(3n){ border-right:1px solid var(--line-2) }
  .matrix > .cell:nth-child(2n){ border-right:0 }
  .mirror-grid, .band-grid{ grid-template-columns:1fr }
  .mirror-stage, .band-viewport{ border-right:0; border-bottom:1px solid var(--line-2) }
  .f-grid{ grid-template-columns:1fr 1fr }
}

@media (max-width:760px){
  body{ font-size:16px }
  header.top{ padding:14px 18px; gap:12px }
  .view-switcher{ display:none }
  .mark span:last-child{ display:none }
  .hero-stage-section{ padding-top:104px }
  .hero-content h1{ font-size:clamp(2.4rem,10vw,3.4rem) }
  .matrix, .matrix.c2{ grid-template-columns:1fr }
  .matrix > .cell{ border-right:0 }
  .metrics{ grid-template-columns:1fr 1fr }
  .metric .num{ font-size:clamp(1.9rem,8vw,2.6rem) }
  .spec-row{ grid-template-columns:1fr; gap:6px }
  .spec-row .v{ text-align:left }
  .f-grid{ grid-template-columns:1fr }
  .mi-stat{ grid-template-columns:1fr }
  .lab-head{ gap:14px }
  .cta-row .btn{ flex:1 1 auto; justify-content:center }
  .telemetry{ gap:6px }
  .telemetry span{ padding:0 12px }
  .telemetry span:nth-child(5){ display:none }
  .telemetry span{ padding:0 9px; font-size:9px }
  .telemetry span:nth-child(4){ display:none }
  .gm-head{ align-items:flex-start }
  .gm-search{ width:100% }
  .gm-grid{ grid-template-columns:repeat(auto-fill,minmax(150px,1fr)) }
  .outro-in{ flex-direction:column; align-items:flex-start }
}

@media (max-width:420px){
  .metrics{ grid-template-columns:1fr }
  .metric{ border-right:0; border-bottom:1px solid var(--line-2) }
}

/* ---------- 无障碍 / 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .rv{ opacity:1; transform:none; clip-path:none }
  .hero-content h1 .ln > span{ transform:none }
  .ticker-track{ animation:none }
}

/* ---------- 补充：模态滚动锁 / 锚点补偿 ---------- */
body.modal-open{ overflow:hidden }
section.ch{ scroll-margin-top:86px }

/* ============================================================================
   v3 · 版式与交互深化
   ========================================================================== */

/* ---------- 章节抬头：滚动时吸附并收紧 ---------- */
.ch-head h2{ text-wrap:balance }
.ch-head h2 em{ text-wrap:balance }

/* 章节指示条：吸附在顶栏下方，只在滚动进入某章时出现 */
.chap-indicator{
  position:fixed; left:var(--gut); top:70px; z-index:55;
  display:flex; align-items:center; gap:12px;
  padding:7px 14px 7px 12px;
  border:1px solid var(--line-2);
  background:rgba(10,11,13,.72);
  backdrop-filter:blur(12px);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--ink-3);
  opacity:0; transform:translateY(-8px); pointer-events:none;
  transition:opacity .4s var(--ease-2), transform .4s var(--ease);
}
.chap-indicator.on{ opacity:1; transform:none }
.chap-indicator b{ color:var(--gold); font-weight:500 }
.chap-indicator span{ color:var(--ink-2); letter-spacing:.1em; text-transform:none; font-size:11px }

/* 正文链接：下划线扫过 */
.ch-sub a, .portal p a, .cell p a, footer.site a{
  position:relative;
  background-image:linear-gradient(var(--gold),var(--gold));
  background-repeat:no-repeat;
  background-size:0% 1px;
  background-position:0 100%;
  transition:background-size .45s var(--ease);
}
.ch-sub a:hover, .cell p a:hover, footer.site a:hover{ background-size:100% 1px }

/* ---------- 里程碑：横向滚动的纪年带 ---------- */
.hscroll{
  position:relative;
  margin-block:clamp(30px,4vw,54px);
}
.hscroll-sticky{
  position:sticky;
  top:clamp(58px,8vh,96px);
  overflow:hidden;
  min-height:min(74vh,640px);
  display:flex; flex-direction:column; justify-content:center;
  padding-block:clamp(16px,3vh,30px);
  /* 两端淡出，卡片进出画面更干净 */
  -webkit-mask-image:linear-gradient(90deg, transparent 0, #000 3%, #000 97%, transparent 100%);
          mask-image:linear-gradient(90deg, transparent 0, #000 3%, #000 97%, transparent 100%);
}
.hscroll .matrix{
  display:flex;
  gap:0;
  width:max-content;
  border-top:1px solid var(--line-2);
  will-change:transform;
}
.hscroll .matrix > .cell{
  width:min(44vw,480px);
  flex:0 0 auto;
  border-right:1px solid var(--line-2);
  border-bottom:1px solid var(--line-2);
  padding:clamp(22px,2.6vw,34px) clamp(20px,2.4vw,32px);
  background:linear-gradient(180deg, rgba(16,17,20,.55), rgba(9,10,12,.2));
}
.hscroll .matrix > .cell::after{ display:none }
.hscroll-progress{
  display:flex; align-items:center; gap:14px;
  margin-top:18px;
  font-family:var(--mono); font-size:9px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--ink-4);
}
.hscroll-progress .bar{
  position:relative; flex:1; height:1px; background:var(--line);
}
.hscroll-progress .bar i{
  position:absolute; inset:0 auto 0 0; width:0; background:var(--gold);
  box-shadow:0 0 10px rgba(201,164,98,.6);
}
@media (max-width:1020px){
  .hscroll{ margin-block:0 }
  .hscroll-sticky{ position:static; overflow:visible }
  .hscroll .matrix{ display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); width:auto }
  .hscroll .matrix > .cell{ width:auto }
  .hscroll-progress{ display:none }
}

/* ---------- 页脚巨型字标 ---------- */
.f-wordmark{
  position:relative;
  z-index:2;
  overflow:hidden;
  padding:clamp(20px,3vw,34px) var(--gut) 0;
  border-top:1px solid var(--line-2);
  background:#050608;
}
.f-wordmark b{
  display:block;
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(3rem,14vw,11rem);
  line-height:.82;
  letter-spacing:-.045em;
  color:transparent;
  -webkit-text-stroke:1px rgba(245,242,234,.16);
  white-space:nowrap;
  transition:color .6s var(--ease-2), -webkit-text-stroke-color .6s var(--ease-2);
}
.f-wordmark:hover b{
  color:rgba(201,164,98,.08);
  -webkit-text-stroke-color:rgba(201,164,98,.55);
}

/* ---------- 顶部导航：滑动指示 ---------- */
.view-switcher{ position:relative }
.view-switcher .vs-ind{
  position:absolute; left:0; top:4px; bottom:4px; width:0;
  background:var(--gold); z-index:0; opacity:.16;
  transition:transform .45s var(--ease), width .45s var(--ease);
  pointer-events:none;
}
.view-tab{ z-index:1 }

/* 移动端：章节大号编号与顶部指示条重复且会被遮挡，隐藏 */
@media (max-width:760px){
  .ch-head::before{ display:none }
  .ch-head{ grid-template-columns:1fr }
}

/* ============================================================
   柔化层 v2：去掉"方正廉价感"——圆角、柔边、内发光、留白
   ============================================================ */
:root{
  --r-xs:4px;
  /* 与全站（assets.css）对齐：主控件 7px、胶囊 999px */
  --r:7px; --r-pill:999px;
  --r-sm:7px; --r-md:7px; --r-lg:14px;
  --edge:1px solid rgba(246,243,236,.085);
  --edge-soft:1px solid rgba(246,243,236,.055);
  --lift:0 1px 0 rgba(255,255,255,.035) inset, 0 24px 48px -34px rgba(0,0,0,.9);
}

/* 章节头图：圆角 + 内描边，不再像一块黑板 */
.ch-head::after{ border-radius:0 0 var(--r-lg) var(--r-lg) }

/* 三栏矩阵：整块圆角卡片，内部改为柔和分隔 */
.matrix{
  border:var(--edge);
  border-radius:var(--r-md);
  background:linear-gradient(180deg, rgba(246,243,236,.035), rgba(246,243,236,.008) 42%, rgba(246,243,236,.014));
  box-shadow:var(--lift);
  overflow:hidden;
}
.cell{
  border-right:1px solid rgba(246,243,236,.06);
  border-bottom:1px solid rgba(246,243,236,.06);
  padding:clamp(26px,3.2vw,42px) clamp(22px,2.6vw,36px) clamp(28px,3.2vw,44px);
}
.matrix > .cell:nth-child(3n){ border-right:0 }
.cell:hover{ background-color:rgba(201,164,98,.045) }

/* 图版：圆角 + 柔和阴影 */
.ch-figure{
  border:var(--edge);
  border-radius:var(--r-md);
  box-shadow:var(--lift);
}
.ch-figure figcaption{ border-left:1px solid rgba(246,243,236,.06) }

/* 引文：圆角底带，左侧金线改成短竖条 */
.pull{
  border-left:0;
  border-radius:var(--r-md);
  padding-left:clamp(26px,3vw,48px);
  background:linear-gradient(100deg, rgba(201,164,98,.075), rgba(201,164,98,.018) 42%, rgba(201,164,98,.004));
  box-shadow:inset 1px 0 0 rgba(201,164,98,.55), var(--lift);
}

/* 按钮：小圆角 + 内高光 */
.btn{ border-radius:var(--r-sm); }
.btn.primary{
  border-radius:var(--r-sm);
  box-shadow:0 1px 0 rgba(255,255,255,.18) inset, 0 14px 26px -18px rgba(201,164,98,.75);
}

/* 数值面板 / 实验台 / 入口卡 */
.metric, .lab-box, .portal, .scroll-cue, .stage-badge{
  border-radius:var(--r-md);
}
.stage-overlay-corner{ border-radius:var(--r-md) 0 var(--r-md) 0 }

/* 头部导航：胶囊化 */
.view-switcher{ border-radius:999px; overflow:hidden }
.view-tab:first-child{ border-radius:999px 0 0 999px }
.view-tab:last-child{ border-radius:0 999px 999px 0 }
.tool-pill{ border-radius:999px }

/* 图鉴：卡片圆角 + 搜索胶囊 */
.gm-card{ border-radius:var(--r-sm) }
.gm-search{ border-radius:999px }
.gm-close{ border-radius:50% }
.gm-filters button{ border-radius:999px }
.gm-filters button.on{ border-radius:999px }
.gm-filters button.on::after{ display:none }
.gm-head{ border-bottom-color:rgba(246,243,236,.07) }

/* 回到顶部 / 指针光圈 */
.to-top{ border-radius:50% }

/* 小节标题引导线更柔 */
.ch{ border-top-color:rgba(246,243,236,.06) }

/* 页脚：原版设计存档入口 */
.f-legacy{
  color:var(--ink-3);
  text-decoration:none;
  border-bottom:1px solid rgba(201,164,98,.35);
  padding-bottom:1px;
  transition:color .25s, border-color .25s;
}
.f-legacy:hover{ color:var(--gold-2); border-color:var(--gold) }

/* ===== 交互动效：点击涟漪 + 按钮磁吸 ===== */
@keyframes fxRip{ from{ transform:scale(.25); opacity:.85 } to{ transform:scale(1); opacity:0 } }
.fx-ripple{
  position:absolute; border-radius:50%; pointer-events:none; z-index:0;
  background:radial-gradient(circle, rgba(238,214,156,.6), rgba(238,214,156,0) 68%);
  animation:fxRip .62s cubic-bezier(.22,.61,.36,1) forwards;
}
.btn, .tool-pill, .view-tab, .to-top, .gm-filters button{ position:relative; overflow:hidden }
.btn:hover{ transform:translateY(-2px) }
.btn.primary:hover{ box-shadow:0 1px 0 rgba(255,255,255,.22) inset, 0 18px 34px -18px rgba(201,164,98,.85) }
.tool-pill:hover, .view-tab:hover{ transform:translateY(-2px) }
@media (prefers-reduced-motion: reduce){ .fx-ripple{ display:none } }

/* 按钮尺度与全站统一（2026-10-26） */
.lab-btn{ font-size:12px; letter-spacing:.1em; min-height:36px; border-radius:var(--r) }

/* ============================================================
   顶栏与全站对齐（2026-10-26）
   首页原来自成一套：等宽大写胶囊 + 金色填充悬停 + 旋转光圈，
   与其它 7 页（assets.css）不一致。这里统一到全站口径。
   ============================================================ */
.mark{
  font-family:inherit; font-size:12px; letter-spacing:.12em; text-transform:uppercase;
}
.mark .aperture{
  width:14px; height:14px; border:0; box-shadow:none; animation:none;
  background:var(--gold);
}
.mark .aperture::after{ inset:4px; background:var(--bg); box-shadow:none }
.mark b{ font-family:inherit; font-weight:600; letter-spacing:.14em }

.view-switcher{
  padding:3px; gap:2px;
  background:rgba(246,243,236,.035);
  border-color:rgba(246,243,236,.07);
}
.view-tab{ padding:6px 12px; font-size:12px; letter-spacing:.06em }
.view-tab .vt-num{ display:none }
.view-tab:hover{ transform:none; background:rgba(246,243,236,.05) }

.tool-pill{
  padding:7px 12px;
  border:1px solid rgba(246,243,236,.075);
  background:rgba(246,243,236,.035);
  font-family:inherit; font-size:11.5px; letter-spacing:.04em;
  text-transform:none;
}
.tool-pill::before{ display:none }
.tool-pill:hover{
  transform:none;
  color:var(--ink);
  background:rgba(246,243,236,.07);
  border-color:rgba(246,243,236,.075);
}

/* 顶栏胶囊图标（与 assets.css 的 .ico 同规矩） */
.tool-pill .ico{
  width:13px; height:13px; flex:none;
  fill:none; stroke:currentColor; stroke-width:1.35;
  stroke-linecap:round; stroke-linejoin:round;
  margin-right:5px; vertical-align:-2px;
}
.tool-pill{ gap:6px }

/* 顶栏尺寸与其它页逐像素对齐 */
header.top{ gap:20px; padding:clamp(12px,1.8vw,18px) var(--gut) }
header.top.solid{
  padding-top:clamp(12px,1.8vw,18px);
  padding-bottom:clamp(12px,1.8vw,18px);
  border-bottom:1px solid rgba(246,243,236,.06);
  background:rgba(7,8,9,.84);
}
header.top::before{ display:none }

/* ============================================================
   顶栏防裁切（2026-10-26）
   原来三段内容都 nowrap 且不可收缩，窄屏时右侧胶囊被顶出可视区、
   被 body 的 overflow-x:hidden 直接裁掉。这里让它们按优先级收缩。
   ============================================================ */
header.top{
  max-width: 100vw;
  gap: clamp(10px, 1.6vw, 20px);
}
header.top .mark{
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
header.top .view-switcher{
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
header.top .view-switcher::-webkit-scrollbar{ display: none }
header.top .top-tools{ flex: none }

/* 中屏：先收 logo 副标题 */
@media (max-width: 1180px){
  header.top .mark span{ display: none }
  header.top .view-tab{ padding: 6px 10px; font-size: 11.5px }
  header.top .tool-pill{ padding: 7px 10px; font-size: 11px }
}

/* 窄屏：胶囊只留图标，文字收起 */
@media (max-width: 900px){
  header.top .tool-pill .tp-txt{ display: none }
  header.top .tool-pill{ padding: 8px 10px; gap: 0 }
  header.top .tool-pill .ico{ margin-right: 0 }
  header.top .view-tab{ padding: 6px 8px; font-size: 11px; letter-spacing: 0 }
}

/* 手机：导航可横滑，logo 收成圆点 */
@media (max-width: 640px){
  header.top .mark b{ display: none }
  header.top .view-switcher{ max-width: 54vw }
  header.top .view-tab{ padding: 6px 8px; font-size: 10.5px }
}

/* 窄屏不再隐藏导航：改成可横滑，与其它 7 页一致（2026-10-26） */
@media (max-width: 760px){
  header.top .view-switcher{
    display: flex;
    max-width: 58vw;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
  }
  header.top .view-switcher::-webkit-scrollbar{ display: none }
  header.top .mark b{ display: inline; font-size: 11px; letter-spacing: .12em }
  header.top .mark{ gap: 8px }
}

/* 窄屏导航单行横滑，不再折行 */
@media (max-width: 760px){
  header.top .view-switcher{ flex-wrap: nowrap; white-space: nowrap }
  header.top .view-tab{ flex: 0 0 auto; white-space: nowrap }
  header.top .mark{ flex: 0 1 auto; min-width: 0 }
}

/* 窄屏：导航可横滑，右缘做渐隐提示，避免"被硬切"的观感 */
@media (max-width: 760px){
  header.top .view-switcher{
    -webkit-mask-image: linear-gradient(to right, #000 84%, transparent 100%);
            mask-image: linear-gradient(to right, #000 84%, transparent 100%);
  }
}

/* 页签自身做成胶囊（与其它页一致），不再顶出"半圆" */
.view-tab{
  border-radius: var(--r-pill);
  padding: 6px 12px;
}
.view-switcher{
  padding: 3px;
  gap: 2px;
  background: rgba(246,243,236,.035);
  border: 1px solid rgba(246,243,236,.075);
  border-radius: var(--r-pill);
  overflow: hidden;
}

/* 首尾页签不再只做半边圆角（那条规则把胶囊切成了半圆） */
.view-tab:first-child,
.view-tab:last-child,
.view-tab:first-child.on,
.view-tab:last-child.on{
  border-radius: var(--r-pill);
}

/* 旧版有一个半透明滑动方块指示器（.vs-ind），会和胶囊选中态叠在一起冒出个方块，去掉 */
.view-switcher .vs-ind{ display: none !important }