/* LUMÉA · 系列 03 · 夜展柜
   夜 #0C0A08 / 纸 #EFE8DA / 金 #C9A96A（对夜 9.0:1）/ 深金 #7A5B26（对纸 5.1:1）
   字体：本地子集 Noto Serif SC（OFL），不挂外部字体 */

@font-face{
  font-family:"Lumea Serif";
  src:url("assets/fonts/lumea-serif.woff2") format("woff2");
  font-weight:300 700;
  font-display:swap;
  font-style:normal;
}

:root{
  --night:#0C0A08;
  --night-2:#12100C;
  --night-3:#1A140E;
  --paper:#EFE8DA;
  --paper-2:#E4DBC9;
  --ink:#14110E;
  --muted:#5F5A53;            /* 对纸 5.6:1 */
  --muted-d:#A79C8B;          /* 对夜 7.4:1 */
  --gold:#C9A96A;             /* 对夜 9.0:1 */
  --gold-2:#E3C98F;
  --gold-ink:#7A5B26;         /* 对纸 5.1:1 */
  --gold-line:rgba(201,169,106,.26);
  --gold-line-2:rgba(201,169,106,.5);
  --rule:rgba(20,17,14,.14);
  --rule-2:rgba(20,17,14,.24);
  --serif:"Lumea Serif",Georgia,"Songti SC","Noto Serif SC","Source Han Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","MiSans","Microsoft YaHei","Noto Sans",sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
  --ease-io:cubic-bezier(.65,0,.35,1);
  --wrap:min(1240px,calc(100% - clamp(40px,7vw,112px)));
  --pad:clamp(96px,12vw,164px);
  --noise: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='.86' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--night);color:var(--paper);
  font:400 17px/1.85 var(--sans);
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3{font-family:var(--serif);font-weight:600}
em{font-style:normal;color:var(--gold)}
::selection{background:rgba(201,169,106,.3);color:var(--paper)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:2px}
.s-stone :focus-visible,.s-light :focus-visible,.s-macro :focus-visible{outline-color:var(--gold-ink)}

.wrap{width:var(--wrap);margin-inline:auto}
.defs{position:absolute;width:0;height:0;overflow:hidden}

.skip{
  position:fixed;left:16px;top:-72px;z-index:99;
  background:var(--paper);color:var(--ink);
  padding:12px 18px;border-radius:2px;font-size:14px;
  transition:top .2s;
}
.skip:focus{top:14px}

.progress{
  position:fixed;inset:0 0 auto 0;height:2px;z-index:70;
  background:linear-gradient(90deg,var(--gold-ink),var(--gold-2));
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 顶栏 ---------- */
.bar{
  position:fixed;inset:0 0 auto;z-index:60;height:72px;
  display:flex;align-items:center;
  background:linear-gradient(to bottom,rgba(12,10,8,.88),rgba(12,10,8,.58));
  -webkit-backdrop-filter:blur(18px) saturate(1.1);
  backdrop-filter:blur(18px) saturate(1.1);
  border-bottom:1px solid rgba(201,169,106,.16);
  transition:height .4s var(--ease),background .4s var(--ease);
}
.bar[data-scrolled="true"]{height:60px;background:rgba(10,8,6,.94)}
.bar-in{width:var(--wrap);margin-inline:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.mark{
  font-family:var(--serif);font-size:20px;line-height:1;letter-spacing:.34em;
  color:var(--paper);padding:14px 2px;white-space:nowrap;
}
.mark:hover{color:var(--gold-2)}
.nav{display:flex;gap:2px}
.nav a{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;min-width:44px;padding:0 13px;
  font-size:13.5px;letter-spacing:.14em;color:var(--muted-d);
  transition:color .25s;
}
.nav a:hover,.nav a.on{color:var(--gold-2)}
.cta{
  display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 20px;
  border:1px solid var(--gold-line-2);border-radius:999px;
  font-size:13.5px;letter-spacing:.1em;color:var(--gold);
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s;
  white-space:nowrap;
}
.cta:hover,.cta:focus-visible{background:var(--gold);color:var(--night);border-color:var(--gold)}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;letter-spacing:.04em;
  transition:background .35s var(--ease),color .35s var(--ease),
             border-color .35s var(--ease),transform .45s var(--ease);
  will-change:transform;
}
.btn-solid{background:var(--paper);color:var(--ink);border:1px solid var(--paper)}
.btn-solid:hover,.btn-solid:focus-visible{background:var(--gold);border-color:var(--gold);color:var(--night)}
.btn-ghost{border:1px solid rgba(201,169,106,.42);color:var(--gold)}
.btn-ghost:hover,.btn-ghost:focus-visible{background:rgba(201,169,106,.12);border-color:var(--gold)}
.s-stone .btn-ghost,.s-light .btn-ghost,.s-macro .btn-ghost{border-color:rgba(122,91,38,.45);color:var(--gold-ink)}
.s-stone .btn-ghost:hover,.s-light .btn-ghost:hover,.s-macro .btn-ghost:hover{background:rgba(122,91,38,.08);border-color:var(--gold-ink)}

/* ---------- 01 首屏 ---------- */
.s-hero{
  position:relative;min-height:100svh;
  display:flex;align-items:center;
  padding:132px 0 72px;
  background:
    radial-gradient(90% 70% at 72% 18%,#201811 0%,transparent 55%),
    radial-gradient(120% 100% at 50% 110%,#0A0806 0%,#0C0A08 60%);
  overflow:hidden;
  scroll-margin-top:72px;
}
.s-hero::before{
  content:"";position:absolute;inset:0;background-image:var(--noise);
  opacity:.05;pointer-events:none;mix-blend-mode:overlay;
}
.hero-glow{
  position:absolute;right:-6%;top:2%;width:min(70vw,820px);aspect-ratio:1;
  background:radial-gradient(circle,rgba(201,169,106,.16) 0%,rgba(201,169,106,.04) 42%,transparent 68%);
  filter:blur(24px);pointer-events:none;
}
.hero-in{
  position:relative;z-index:2;width:var(--wrap);margin-inline:auto;
  display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  gap:clamp(28px,5vw,72px);align-items:center;
}
.eyebrow{
  display:flex;align-items:center;gap:16px;
  font-size:12px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--gold);margin-bottom:32px;
}
.eyebrow i{width:44px;height:1px;background:var(--gold-line-2)}
.display{
  font-size:clamp(44px,6.1vw,92px);
  line-height:1.14;letter-spacing:-.015em;
  color:var(--paper);
}
.display em{color:var(--gold)}
.ln{display:block;overflow:hidden;padding-bottom:.06em}
.ln>span{display:block}
.js .ln>span{transform:translateY(112%);transition:transform 1.15s var(--ease)}
.js .ln:nth-child(2)>span{transition-delay:.12s}
.js .s-hero.in .ln>span{transform:none}
.lede{
  margin-top:30px;max-width:23em;
  color:var(--muted-d);font-size:17px;line-height:1.9;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.hero-specs{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:54px;padding-top:20px;border-top:1px solid rgba(201,169,106,.18);
  max-width:540px;
}
.hero-specs div{padding-left:18px;border-left:1px solid rgba(201,169,106,.14)}
.hero-specs div:first-child{padding-left:0;border-left:0}
.hero-specs dt{font-size:11.5px;letter-spacing:.14em;color:var(--muted-d)}
.hero-specs dd{
  font-family:var(--serif);font-size:26px;line-height:1.3;color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.hero-specs dd small{font-size:13px;color:var(--muted-d);margin-left:2px}

.hero-stage{
  position:relative;justify-self:end;
  width:min(100%,600px);aspect-ratio:1;
  perspective:1200px;
}
.halo{
  position:absolute;inset:6%;border-radius:50%;
  background:radial-gradient(circle at 50% 45%,rgba(227,201,143,.18),rgba(201,169,106,.05) 48%,transparent 70%);
  filter:blur(18px);pointer-events:none;
}
.hero-gem{
  position:absolute;inset:0;
  transform:rotate(-9deg);
  transition:transform .3s var(--ease-io);
  will-change:transform;
}
.gem{width:100%;height:100%;overflow:visible}
.hero-stage .gem{
  filter:drop-shadow(0 26px 48px rgba(0,0,0,.55)) drop-shadow(0 0 18px rgba(201,169,106,.08));
}
.gem .body{fill:#151009}
.gem .facet{stroke:rgba(201,169,106,.3);stroke-width:.55;vector-effect:non-scaling-stroke}
.gem .facet:not([fill]){fill:#F2E6CE}
.gem .facet.ug{stroke:rgba(201,169,106,.22)}
.gem .facet.table{stroke:rgba(201,169,106,.5)}
.gem .edge{fill:none;stroke:var(--gold-2);stroke-width:1.6;vector-effect:non-scaling-stroke}
.gem .ring{fill:none;stroke:rgba(201,169,106,.28);stroke-width:.7;vector-effect:non-scaling-stroke}
.gem .ring-b{stroke-dasharray:1 9}
.gem .guide{
  fill:none;stroke:rgba(201,169,106,.5);stroke-width:.7;
  stroke-dasharray:3 5;vector-effect:non-scaling-stroke;
}
.gem .claw{
  fill:#C9A96A;stroke:#E9D2A0;stroke-width:.5;vector-effect:non-scaling-stroke;
  filter:drop-shadow(0 2px 2px rgba(0,0,0,.55));
}
.gem .claw-shadow{fill:rgba(0,0,0,.4)}

.sheen{
  position:absolute;inset:14%;border-radius:50%;pointer-events:none;
  background:conic-gradient(from 0deg,
    transparent 0deg,rgba(255,244,220,.5) 26deg,transparent 58deg,
    transparent 180deg,rgba(255,244,220,.18) 210deg,transparent 246deg);
  -webkit-mask:radial-gradient(circle,transparent 62%,#000 70%,#000 88%,transparent 96%);
  mask:radial-gradient(circle,transparent 62%,#000 70%,#000 88%,transparent 96%);
  mix-blend-mode:screen;opacity:.55;
  animation:spin 26s linear infinite;
}
@keyframes spin{to{transform:rotate(1turn)}}

.caustic{
  position:absolute;inset:14%;border-radius:50%;pointer-events:none;
  background:conic-gradient(from 150deg,
    transparent 0deg,rgba(255,120,90,.32) 18deg,rgba(255,220,120,.22) 34deg,
    rgba(120,255,190,.24) 52deg,rgba(120,170,255,.3) 70deg,transparent 96deg,
    transparent 360deg);
  opacity:.3;filter:blur(10px);mix-blend-mode:screen;
}
.caustic.soft{opacity:.18;filter:blur(14px)}

.reflect{
  position:absolute;left:0;top:78%;width:100%;height:64%;
  transform:scaleY(-.6);transform-origin:top center;
  opacity:.16;filter:blur(3px);
  -webkit-mask:linear-gradient(to bottom,#000,transparent 72%);
  mask:linear-gradient(to bottom,#000,transparent 72%);
  pointer-events:none;
}
.hero-cap{
  position:absolute;left:2%;right:2%;bottom:-4px;
  display:flex;justify-content:center;gap:18px;
  font-size:11.5px;letter-spacing:.16em;color:var(--muted-d);
}
.hero-cap span+span::before{content:"·";margin-right:18px;color:rgba(201,169,106,.6)}
.scroll-cue{
  position:absolute;left:max(20px,calc((100vw - 1240px)/2));bottom:34px;
  display:flex;align-items:center;gap:12px;
  font-size:10.5px;letter-spacing:.28em;color:var(--muted-d);
}
.scroll-cue span{
  display:block;width:1px;height:38px;background:linear-gradient(to bottom,var(--gold),transparent);
  position:relative;overflow:hidden;
}
.scroll-cue span::after{
  content:"";position:absolute;top:-38px;left:0;width:1px;height:20px;background:var(--gold-2);
  animation:drop 2.4s var(--ease-io) infinite;
}
@keyframes drop{0%{transform:translateY(0)}60%,100%{transform:translateY(70px)}}

/* ---------- 分段基础 ---------- */
.sec{position:relative;padding:var(--pad) 0;scroll-margin-top:72px}
.dark{background:var(--night);color:var(--paper)}
.dark::after{
  content:"";position:absolute;inset:0;background-image:var(--noise);
  opacity:.04;pointer-events:none;mix-blend-mode:overlay;
}
.dark .wrap{position:relative;z-index:2}
.s-stone,.s-light,.s-macro{background:var(--paper);color:var(--ink)}
.s-stone em,.s-light em,.s-macro em{color:var(--gold-ink)}
.s-stone .kicker,.s-light .kicker,.s-macro .kicker{color:var(--gold-ink)}
.s-stone .body,.s-light .body,.s-macro .body{color:var(--muted)}
.s-stone .note,.s-light .note,.s-macro .note{color:rgba(95,90,83,.92)}
.kicker{
  display:flex;align-items:center;gap:14px;
  font-size:11.5px;letter-spacing:.28em;text-transform:uppercase;
  color:var(--gold);margin-bottom:26px;
}
.kicker span{
  display:inline-grid;place-items:center;
  width:30px;height:30px;border:1px solid currentColor;border-radius:50%;
  font-size:10.5px;letter-spacing:0;opacity:.85;
}
.h2{
  font-size:clamp(30px,3.6vw,52px);
  line-height:1.28;letter-spacing:-.012em;
}
.body{margin-top:26px;max-width:32em;color:var(--muted-d);font-size:16.5px;line-height:1.9}
.note{margin-top:26px;font-size:13.5px;line-height:1.8;color:rgba(167,156,139,.8);max-width:34em}
.cap{
  display:flex;justify-content:space-between;gap:20px;
  margin-top:18px;font-size:12.5px;letter-spacing:.04em;color:var(--muted);
}
.cap span+span{color:var(--muted)}
.dark .cap{color:var(--muted-d)}
.ghost-num{
  position:absolute;right:0;top:40px;z-index:1;
  font-family:var(--serif);font-size:clamp(140px,22vw,300px);line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(201,169,106,.12);
  pointer-events:none;user-select:none;
}
.sec-head{max-width:760px}
.sec-head.split{
  max-width:none;display:grid;grid-template-columns:1.05fr .95fr;
  gap:clamp(24px,5vw,80px);align-items:end;
}
.sec-head.split .body{margin-top:0;padding-bottom:6px}

/* ---------- 02 石 ---------- */
.s-stone{padding-bottom:0}
.s-stone .grid{
  display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);
  gap:clamp(36px,6vw,92px);align-items:start;
}
.s-stone .figure{position:sticky;top:110px}
.s-stone .copy{min-height:160vh;padding-bottom:var(--pad)}
.stage{
  position:relative;width:100%;aspect-ratio:1;
}
.plate{
  border:1px solid var(--rule);
  background:
    radial-gradient(75% 70% at 50% 44%,#F6F0E3 0%,#E8DFCC 70%,#E1D7C2 100%);
  box-shadow:0 24px 60px rgba(20,17,14,.08),inset 0 0 0 1px rgba(255,255,255,.35);
}
.dark .plate{
  border-color:rgba(201,169,106,.18);
  background:
    radial-gradient(70% 65% at 50% 42%,#19130D 0%,#100C08 72%,#0B0907 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.03),0 30px 70px rgba(0,0,0,.4);
}
.s-stone .plate{padding:0}
.cutline{
  position:absolute;left:10%;right:10%;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(122,91,38,.75),transparent);
  opacity:0;pointer-events:none;
}
.cutline::after{
  content:"";position:absolute;right:0;top:-2px;width:5px;height:5px;border-radius:50%;
  background:var(--gold-ink);
}
.steps{list-style:none;margin-top:44px;border-top:1px solid var(--rule)}
.steps li{
  display:grid;grid-template-columns:64px 1fr;gap:18px;
  padding:30px 0;border-bottom:1px solid var(--rule);
  transition:opacity .5s var(--ease),padding-left .5s var(--ease);
  opacity:.5;
}
.steps li .n{
  font-family:var(--serif);font-size:13px;letter-spacing:.12em;
  color:var(--gold-ink);padding-top:4px;
}
.steps li b{
  display:block;font-family:var(--serif);font-weight:600;font-size:21px;letter-spacing:.01em;
}
.steps li p{
  margin-top:6px;font-size:14.5px;line-height:1.8;color:var(--muted);max-width:26em;
}
.steps li.on{opacity:1;padding-left:8px}
.steps li.on .n{color:var(--gold-ink)}
.split-nums{
  display:grid;grid-template-columns:repeat(3,1fr);
  margin-top:46px;border-top:1px solid var(--rule);padding-top:22px;
}
.split-nums div+div{padding-left:20px;border-left:1px solid var(--rule)}
.split-nums dt{font-size:12px;letter-spacing:.14em;color:var(--muted)}
.split-nums dd{
  font-family:var(--serif);font-size:30px;line-height:1.3;
  font-variant-numeric:tabular-nums;
}

/* ---------- 03 切工 ---------- */
.s-cut{padding-bottom:calc(var(--pad) + 20px)}
.s-cut .sec-head{max-width:720px}
.panel{
  margin-top:clamp(48px,6vw,84px);
  border-radius:18px;padding:clamp(28px,4vw,56px);
  position:relative;overflow:hidden;
}
.glass{
  background:linear-gradient(155deg,rgba(255,255,255,.075),rgba(255,255,255,.015) 46%,rgba(201,169,106,.035));
  border:1px solid rgba(201,169,106,.24);
  -webkit-backdrop-filter:blur(18px) saturate(1.15);
  backdrop-filter:blur(18px) saturate(1.15);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.14),
    inset 0 -1px 0 rgba(0,0,0,.35),
    0 30px 80px rgba(0,0,0,.35);
}
.glass::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,transparent 20%,rgba(255,255,255,.05) 38%,transparent 52%);
}
.panel::after{
  content:"";position:absolute;right:-12%;top:-42%;width:62%;aspect-ratio:1;
  pointer-events:none;
  background:radial-gradient(circle,rgba(201,169,106,.17),transparent 66%);
  filter:blur(34px);
}
.metrics{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(20px,4vw,56px);position:relative;
}
.metric + .metric{padding-left:clamp(20px,4vw,56px);border-left:1px solid rgba(201,169,106,.16)}
.mlabel{font-size:12px;letter-spacing:.16em;color:var(--muted-d)}
.mval{
  display:flex;align-items:baseline;gap:4px;margin-top:10px;
  font-family:var(--serif);font-variant-numeric:tabular-nums;
}
.mval b{font-size:clamp(42px,5vw,68px);font-weight:500;line-height:1.1;color:var(--paper)}
.mval span{font-size:16px;color:var(--gold)}
.mbar{
  position:relative;height:2px;margin-top:22px;
  background:rgba(239,232,218,.14);
}
.mbar i{
  position:absolute;inset:0 auto 0 0;width:0;
  background:linear-gradient(90deg,var(--gold-ink),var(--gold-2));
  transition:width 1.5s var(--ease);
}
.mbar.in i{width:var(--v)}
.mbar .tick{
  position:absolute;top:-4px;left:var(--t);width:1px;height:10px;
  background:rgba(239,232,218,.42);
}
.mref{margin-top:10px;font-size:12.5px;color:var(--muted-d)}
.angles{
  display:grid;grid-template-columns:repeat(3,1fr);
  margin-top:clamp(32px,4vw,52px);padding-top:24px;
  border-top:1px solid rgba(201,169,106,.16);
}
.angles div+div{padding-left:20px;border-left:1px solid rgba(201,169,106,.14)}
.angles dt{font-size:12px;letter-spacing:.14em;color:var(--muted-d)}
.angles dd{
  font-family:var(--serif);font-size:24px;line-height:1.4;color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.panel .note{margin-top:30px;font-size:12.5px;color:rgba(167,156,139,.8)}

/* ---------- 04 光 ---------- */
.s-light{background:linear-gradient(to bottom,#EFE8DA,#E9E0CF)}
.light-grid{
  display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:clamp(28px,5vw,72px);align-items:start;margin-top:clamp(44px,6vw,76px);
}
.compass-wrap{cursor:grab;touch-action:pan-y;outline-offset:6px}
.compass-wrap:active{cursor:grabbing}
.compass{
  position:absolute;inset:0;border-radius:50%;pointer-events:none;
  background:
    radial-gradient(circle,transparent 57.05%,rgba(122,91,38,.3) 57.2%,rgba(122,91,38,.3) 57.45%,transparent 57.6%),
    repeating-conic-gradient(from 0deg,
      rgba(122,91,38,.3) 0deg .7deg,transparent .7deg 15deg);
  -webkit-mask:radial-gradient(circle,transparent 55.8%,#000 56.4%,#000 57.6%,transparent 58.2%);
  mask:radial-gradient(circle,transparent 55.8%,#000 56.4%,#000 57.6%,transparent 58.2%);
}
.stage-tag{
  position:absolute;left:18px;bottom:14px;
  font-size:10.5px;letter-spacing:.3em;color:var(--gold-ink);
}
.readout{padding-left:clamp(0px,2vw,24px);padding-top:22px;border-top:1px solid var(--rule)}
.hint{font-size:13px;letter-spacing:.04em;color:var(--muted)}
kbd{
  display:inline-grid;place-items:center;min-width:24px;height:24px;margin:0 2px;
  border:1px solid var(--rule-2);border-radius:4px;
  font:inherit;font-size:12px;line-height:1;
  background:rgba(255,255,255,.34);
}
.deg{
  display:flex;align-items:flex-start;gap:2px;
  margin-top:18px;font-family:var(--serif);font-variant-numeric:tabular-nums;
  font-size:clamp(64px,9vw,118px);line-height:1;letter-spacing:-.03em;
  color:var(--ink);
}
.deg small{font-size:.28em;margin-top:.16em;color:var(--gold-ink)}
.deg-label{font-size:11.5px;letter-spacing:.26em;color:var(--muted);margin-top:10px}
.mini{
  display:inline-flex;align-items:center;min-height:44px;padding:0 18px;
  margin-top:26px;border:1px solid var(--rule-2);border-radius:999px;
  font-size:13px;color:var(--ink);
  transition:.3s var(--ease);
}
.mini:hover,.mini:focus-visible{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.readout .note{margin-top:34px;padding-top:20px;border-top:1px solid var(--rule);max-width:24em}

/* ---------- 05 八枚 ---------- */
.s-collection{padding-bottom:calc(var(--pad) - 20px)}
.head-row{
  display:flex;justify-content:space-between;align-items:flex-end;gap:32px;
}
.rail-nav{display:flex;gap:8px;padding-bottom:8px;position:relative;z-index:3}
.round{
  width:48px;height:48px;display:grid;place-items:center;
  border:1px solid var(--gold-line-2);border-radius:50%;
  background:rgba(12,10,8,.62);
  color:var(--gold);font-size:17px;
  transition:.3s var(--ease);
}
.round:hover,.round:focus-visible{background:var(--gold);color:var(--night);border-color:var(--gold)}
.rail-wrap{margin-top:clamp(40px,5vw,64px)}
.rail{
  display:flex;gap:18px;overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x mandatory;
  scroll-padding-left:max(24px,calc((100vw - 1240px)/2));
  padding:6px max(24px,calc((100vw - 1240px)/2)) 26px;
  scrollbar-width:none;-ms-overflow-style:none;
  cursor:grab;touch-action:pan-x;
}
.rail::-webkit-scrollbar{display:none}
.rail.dragging{cursor:grabbing;scroll-snap-type:none;scroll-behavior:auto;user-select:none}
.rail:focus-visible{outline:2px solid var(--gold);outline-offset:-4px}
.card{
  position:relative;flex:0 0 clamp(258px,26vw,320px);
  min-height:430px;scroll-snap-align:start;
  display:flex;flex-direction:column;
  padding:24px;border:1px solid rgba(201,169,106,.18);
  background:linear-gradient(165deg,#16110C 0%,#0E0B08 72%);
  overflow:hidden;
  transition:border-color .4s var(--ease),transform .5s var(--ease);
}
.card::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;
  background:radial-gradient(240px circle at var(--mx,50%) var(--my,30%),rgba(201,169,106,.16),transparent 62%);
  transition:opacity .5s;
}
.card:hover{border-color:rgba(201,169,106,.42);transform:translateY(-4px)}
.card:hover::before{opacity:1}
.card-top{display:flex;justify-content:space-between;font-size:11px;letter-spacing:.18em;color:var(--muted-d)}
.card-idx{color:var(--gold)}
.card-art{
  flex:1;display:grid;place-items:center;padding:22px 0;
  background:radial-gradient(circle at 50% 48%,rgba(201,169,106,.09),transparent 62%);
}
.card-art svg{width:76%;max-width:170px;overflow:visible}
.card-art .shape{
  fill:rgba(201,169,106,.04);stroke:rgba(201,169,106,.62);stroke-width:.9;
  vector-effect:non-scaling-stroke;
}
.card-art .ln2{fill:none;stroke:rgba(201,169,106,.3);stroke-width:.7;vector-effect:non-scaling-stroke}
.card-art .shape-inner{fill:none;stroke:rgba(201,169,106,.34);stroke-width:.7;vector-effect:non-scaling-stroke}
.card-art .core{fill:rgba(239,232,218,.06);stroke:none}
.card:hover .card-art .shape{fill:rgba(201,169,106,.09)}
.card-name{font-family:var(--serif);font-size:25px;font-weight:600;line-height:1.3}
.card-line{margin-top:8px;font-size:13.5px;line-height:1.8;color:var(--muted-d)}
.card-foot{
  display:flex;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:12px;border-top:1px solid rgba(201,169,106,.14);
  font-size:11px;letter-spacing:.1em;color:rgba(167,156,139,.8);
}
.rail-dots{display:flex;justify-content:center;gap:7px;margin-top:8px}
.rail-dots span{
  width:5px;height:5px;border-radius:50%;background:rgba(239,232,218,.22);
  transition:.35s var(--ease);
}
.rail-dots span.on{width:18px;border-radius:3px;background:var(--gold)}
.rail-foot{
  display:flex;justify-content:space-between;align-items:baseline;gap:32px;
  margin-top:26px;padding-top:18px;border-top:1px solid rgba(201,169,106,.14);
}
.rail-now{font-size:13px;letter-spacing:.1em;color:var(--gold)}
.rail-foot .note{margin:0;max-width:38em;font-size:12px}

/* ---------- 06 微距 ---------- */
.scope{
  width:min(720px,100%);
  margin:clamp(44px,6vw,72px) auto 0;
  cursor:crosshair;touch-action:pan-y;
  overflow:hidden;
}
.scope .gem{position:absolute;inset:0;width:100%;height:100%}
.scope-hint{
  position:absolute;left:18px;bottom:14px;
  font-size:10.5px;letter-spacing:.24em;color:var(--gold-ink);
  transition:opacity .4s;
}
.scope.used .scope-hint{opacity:0}
.lens{
  position:absolute;left:50%;top:50%;
  width:clamp(112px,17vw,168px);aspect-ratio:1;
  transform:translate(-50%,-50%);
  border-radius:50%;overflow:hidden;
  background:#0D0A07;
  box-shadow:0 0 0 1px rgba(227,201,143,.9),0 0 0 4px rgba(12,10,8,.18),0 18px 44px rgba(20,17,14,.35);
  pointer-events:none;z-index:3;
}
.lens svg{
  width:100%;height:100%;
  filter:url(#refract);
}
.lens-ring{
  position:absolute;inset:0;border-radius:50%;pointer-events:none;
  box-shadow:inset 0 0 22px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.35);
  background:conic-gradient(from 200deg,rgba(255,120,90,.16),rgba(255,230,150,.1),rgba(120,255,190,.12),rgba(120,170,255,.16),transparent 60%);
  mix-blend-mode:screen;
}
.lens-spec{
  position:absolute;left:16%;top:12%;width:34%;height:16%;
  border-radius:50%;transform:rotate(-32deg);
  background:linear-gradient(to bottom,rgba(255,255,255,.34),transparent);
  filter:blur(2px);pointer-events:none;
}
.s-macro .cap{margin-top:20px;max-width:720px;margin-inline:auto}

/* ---------- 07 镶 ---------- */
.s-setting{
  padding-bottom:0;
  background:
    radial-gradient(80% 60% at 50% 108%,#2A1B0F 0%,transparent 60%),
    linear-gradient(to bottom,#0C0A08,#120D09 70%,#171009);
  overflow:hidden;
}
.setting-glow{
  position:absolute;left:50%;bottom:-14%;width:min(80vw,900px);aspect-ratio:1;
  transform:translateX(-50%);
  background:radial-gradient(circle,rgba(227,201,143,.12),rgba(201,169,106,.03) 45%,transparent 68%);
  filter:blur(30px);pointer-events:none;
}
.s-setting .grid{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(36px,6vw,88px);align-items:center;
  position:relative;z-index:2;
}
.s-setting .plate{
  border-color:rgba(201,169,106,.18);
  background:radial-gradient(70% 65% at 50% 42%,#19130D 0%,#100C08 72%,#0B0907 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.03),0 30px 70px rgba(0,0,0,.4);
}
.s-setting .figure .stage{width:min(100%,560px);margin-inline:auto}
.s-setting .cap{display:flex;justify-content:space-between;gap:16px;max-width:560px;margin-inline:auto}
.claws-steps li{opacity:1;border-bottom:1px solid rgba(201,169,106,.14)}
.claws-steps li .n{color:var(--gold)}
.claws-steps li p{color:var(--muted-d)}
.claws-steps li.on{padding-left:8px}
.s-setting .note{color:rgba(167,156,139,.82)}
.gem .claw{opacity:0;transform-box:fill-box;transform-origin:center;transform:scale(1.5)}
.js .stage-set-in .claw,.claws-in .claw{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .6s var(--ease)}
.closing{
  position:relative;z-index:2;
  margin-top:calc(var(--pad) * .9);
  padding:clamp(60px,7vw,96px) 0 clamp(80px,9vw,128px);
  border-top:1px solid rgba(201,169,106,.16);
  text-align:center;
}
.closing-line{
  font-family:var(--serif);font-size:clamp(26px,3.2vw,42px);
  line-height:1.5;color:var(--paper);
}
.closing .btn{margin-top:36px}

/* ---------- 页脚 ---------- */
.foot{background:#080604;border-top:1px solid rgba(201,169,106,.14);padding:56px 0 64px}
.foot .wrap{
  display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:center;
}
.foot-mark{font-family:var(--serif);font-size:18px;letter-spacing:.32em;color:var(--paper)}
.disc{font-size:13px;line-height:1.8;color:var(--muted-d);max-width:36em}
.meta{font-size:11.5px;letter-spacing:.16em;color:rgba(167,156,139,.82);white-space:nowrap}

/* ---------- 入场 ---------- */
.js .rise{opacity:0;transform:translateY(18px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rise.in{opacity:1;transform:none}

/* ---------- 响应 ---------- */
@media (max-width:1120px){
  .nav a{padding:0 9px;letter-spacing:.08em}
  .hero-stage{width:min(100%,520px)}
}
@media (max-width:980px){
  .nav{display:none}
  .ghost-num{display:none}
  .display{font-size:clamp(42px,7.4vw,64px)}
  .hero-in{grid-template-columns:1fr;gap:44px}
  .hero-stage{justify-self:center;width:min(100%,540px);margin-bottom:36px}
  .s-hero{padding-top:128px;min-height:0}
  .hero-specs{max-width:none}
  .sec-head.split{grid-template-columns:1fr;gap:24px}
  .sec-head.split .body{margin-top:0}
  .s-stone .grid,.s-setting .grid,.light-grid{grid-template-columns:1fr;gap:40px}
  .s-stone .figure{position:static}
  .s-stone .copy{min-height:0;padding-bottom:0}
  .s-stone{padding-bottom:var(--pad)}
  .light-grid .readout{padding-left:0}
  .deg{font-size:clamp(64px,12vw,96px)}
  .rail-foot{flex-direction:column;gap:10px}
  .foot .wrap{grid-template-columns:1fr;gap:14px;align-items:start}
  .scroll-cue{display:none}
}
@media (max-width:680px){
  body{font-size:16px}
  :root{--pad:88px}
  .bar{height:64px}
  .bar[data-scrolled="true"]{height:58px}
  .mark{font-size:17px;letter-spacing:.28em}
  .cta{min-height:44px;padding:0 14px;font-size:12.5px}
  .display{font-size:clamp(38px,11.5vw,52px);line-height:1.2}
  .lede{font-size:15.5px;margin-top:24px}
  .eyebrow{margin-bottom:24px;font-size:11px;letter-spacing:.24em}
  .hero-specs{grid-template-columns:1fr 1fr;row-gap:18px;margin-top:40px}
  .hero-specs div:nth-child(3){padding-left:0;border-left:0}
  .hero-specs dd{font-size:22px}
  .h2{font-size:clamp(27px,7.6vw,36px)}
  .body{font-size:15.5px}
  .sec{padding:var(--pad) 0}
  .metrics{grid-template-columns:1fr;gap:0}
  .metric{padding:22px 0}
  .metric + .metric{padding-left:0;border-left:0;border-top:1px solid rgba(201,169,106,.14)}
  .metric:first-child{padding-top:0}
  .mval b{font-size:44px}
  .angles{grid-template-columns:1fr 1fr 1fr;gap:8px}
  .angles div+div{padding-left:12px}
  .angles dd{font-size:19px}
  .angles dt{font-size:11px;letter-spacing:.08em}
  .panel{padding:24px 20px;border-radius:14px}
  .steps li{grid-template-columns:44px 1fr;gap:12px;padding:24px 0}
  .steps li b{font-size:19px}
  .steps li p{font-size:14px}
  .split-nums dd{font-size:25px}
  .card{flex-basis:82vw;min-height:400px}
  .card-name{font-size:23px}
  .rail-nav{display:none}
  .rail-now{font-size:12.5px}
  .rail-foot .note{font-size:11.5px}
  .scope{width:100%}
  .lens{width:112px}
  .scope-hint{font-size:9.5px;letter-spacing:.18em}
  .cap{font-size:11.5px;gap:12px}
  .closing-line{font-size:26px}
  .foot .wrap{padding-bottom:8px}
  .disc{font-size:12.5px}
  .scroll-cue{display:none}
}
@media (max-width:380px){
  .cta span{display:none}
  .hero-actions .btn{width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .js .rise{opacity:1;transform:none}
  .js .ln>span{transform:none}
  .sheen{animation:none}
}