/*
 * Corvux — visual system
 * 骨架：GitHub Universe（巨型字标 / 细线网格 / 表格化信息块 / 单一强调色）
 * 氛围：Rhine Lab（暗场 / 粒子 / 金属 3D / 字距拉宽的等宽小字）
 *
 * 一个 token 决定全部：--accent
 */

/* ═══ 字体 ═══ */
@font-face {
  font-family: "Mona Sans";
  src: url("../fonts/MonaSansVF-opsz-wght.woff2") format("woff2-variations");
  font-weight: 200 900;
  font-stretch: 75% 125%;
  font-display: swap;
}
@font-face {
  font-family: "Mona Sans Mono";
  src: url("../fonts/MonaSansMonoVF-wght.woff2") format("woff2-variations");
  font-weight: 200 900;
  font-display: swap;
}

/* ═══ Tokens ═══ */
:root {
  --paper: #0a0c0b;
  --paper-2: #0d100e;
  --ink: #eef1ec;
  --ink-dim: #9aa39d;
  --ink-faint: #5c6560;
  --line: #1e2420;
  --line-bright: #2c342e;

  /* Rhine 的暖金 —— 唯一强调色 */
  --accent: #c8a464;
  --accent-soft: #8c744b;

  /* GitHub 的绿（次强调，仅用于 live 状态） */
  --live: #3fb950;

  --font: "Mona Sans", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Mona Sans Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-glide: cubic-bezier(0.33, 1, 0.68, 1);
  --dur: 0.6s;

  --edge: clamp(16px, 4vw, 48px);
  --max: 1560px;
}

[data-theme="light"] {
  --paper: #e8e5e1;
  --paper-2: #f2f0ec;
  --ink: #080a08;
  --ink-dim: #4a4f4a;
  --ink-faint: #8a8f88;
  --line: #cfcac2;
  --line-bright: #b8b2a8;
  --accent: #8c744b;
  --accent-soft: #a68a5c;
  --live: #08872b;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--font);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-optical-sizing: auto;
}

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

em {
  font-style: italic;
  color: var(--accent);
}

.dim {
  color: var(--ink-dim);
}

/* ═══ 粒子底场 ═══ */
#field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

main,
.topbar,
.footer {
  position: relative;
  z-index: 1;
}

/* ═══ 顶栏 ═══ */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
  padding: 0 var(--edge);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mark {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.mark-glyph {
  color: var(--accent);
  font-size: 15px;
  line-height: 1;
}

.mark-word {
  font-weight: 700;
  letter-spacing: 0.18em;
}

.nav {
  display: flex;
  gap: 2px;
  margin-left: 8px;
}

.nav a {
  padding: 8px 14px;
  border: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  color: var(--ink-dim);
}

.nav a:hover {
  color: var(--ink);
  border-color: var(--line);
}

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.clock {
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.btn-pass {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--accent);
  color: #0a0c0b;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform 0.3s var(--ease), background 0.2s;
  white-space: nowrap;
}

.btn-pass:hover {
  background: var(--ink);
  transform: translateY(-1px);
}

/* ═══ HERO ═══ */
.hero {
  position: relative;
  min-height: 100svh;
  /* 底部渐隐，避免 3D 与玻璃区块硬接 */
  margin-bottom: 0;
  padding: calc(64px + clamp(28px, 5vh, 64px)) var(--edge) clamp(56px, 9vh, 96px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero > *:not(.stage):not(.stage-caption):not(.scroll-hint) {
  position: relative;
  z-index: 2;
}

/* 首屏底部的渐隐过渡 */
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 22vh;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--paper) 88%);
}

/* 字标区压住 3D 时保持可读：用径向暗场 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 46% 30% at 50% 34%, rgba(10,12,11,0.72), transparent 70%),
    linear-gradient(180deg, rgba(10,12,11,0.35) 0%, transparent 30%, rgba(10,12,11,0.86) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) minmax(0, 1.4fr) auto;
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
  max-width: var(--max);
  width: 100%;
  margin: clamp(24px, 4vh, 44px) auto 0;
}

.hero-lede {
  padding-top: 6px;
}

.hero-cta {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
}

/* 巨型字标 —— 横贯全宽 */
.hero-title {
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
}

.hero-title h1 {
  font-size: clamp(64px, 17.6vw, 300px);
  line-height: 0.82;
  font-weight: 800;
  letter-spacing: -0.045em;
  font-stretch: 105%;
  margin-left: -0.02em;
  padding-bottom: 0.06em;
}

.hero-title h1 .line {
  display: block;
}

.hero-sub .latin {
  color: var(--accent);
  font-style: italic;
  margin-left: 14px;
  letter-spacing: 0.06em;
  text-transform: none;
}

.hero-sub {
  margin-top: clamp(14px, 2vw, 26px);
  font-family: var(--mono);
  font-size: clamp(11px, 1.1vw, 13px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* 信息行：细线三栏（GitHub Universe 的表格化手法） */
.hero-meta {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.meta-cell {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.meta-cell .k {
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.meta-cell .v {
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 7px;
}

.meta-cell.wide {
  grid-template-columns: 1fr;
  padding: 20px 0;
  font-family: var(--font);
  font-size: clamp(15px, 1.35vw, 18px);
  line-height: 1.5;
  letter-spacing: 0;
}

.lede {
  max-width: 34ch;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  flex-shrink: 0;
  transition: background 0.3s, box-shadow 0.3s;
}

.dot.on {
  background: var(--live);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--live) 22%, transparent);
  animation: pulse 2.6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.btn-primary {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 18px 22px;
  background: var(--accent);
  color: #0a0c0b;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background 0.25s, transform 0.4s var(--ease);
}

.btn-primary:hover {
  background: var(--ink);
  transform: translateY(-2px);
}

/* ═══ 3D backdrop ═══
   全幅固定背景，不参与 .hero 的 flex 排版（否则会把字标推下去） */
.stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100svh;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 9%, #000 74%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 9%, #000 74%, transparent 100%);
}

#scene {
  display: block;
  width: 100%;
  height: 100%;

}

/* FIG 标注：右下角（原来被 hero 的 relative 规则压成流内元素，
   正好落在 FOCUS 那一行上 —— 用户指出「太近了」） */
.stage-caption {
  position: fixed;
  right: var(--edge);
  bottom: 20px;
  z-index: 3;
  display: flex;
  flex-direction: row-reverse;
  align-items: center;
  gap: 12px;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  pointer-events: none;
}

.line-h {
  width: 40px;
  height: 1px;
  background: var(--accent-soft);
}

/* ═══ scroll hint ═══ */
/* scroll 提示：底部居中（原来挤在左下角 FIG 旁边） */
.scroll-hint {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.tick {
  width: 1px;
  height: 26px;
  background: linear-gradient(var(--accent), transparent);
  animation: tick 2s var(--ease-glide) infinite;
  transform-origin: top;
}

@keyframes tick {
  0%, 100% { transform: scaleY(0.35); opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ═══ 区块通用 ═══ */
section.now,
section.notes {
  position: relative;
  z-index: 2;
  padding: clamp(64px, 10vh, 120px) var(--edge);
  max-width: var(--max);
  margin: 0 auto;
  border-top: 1px solid var(--line);
  /* 玻璃展板：半透明深底 + 模糊，压在 3D 之上仍可读 */
  background: color-mix(in srgb, var(--paper) 74%, transparent);
  backdrop-filter: blur(10px) saturate(1.12);
  -webkit-backdrop-filter: blur(10px) saturate(1.12);
}

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 52px);
  font-family: var(--mono);
}

.sec-no {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.sec-head h2 {
  font-family: var(--font);
  font-size: clamp(28px, 4.2vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.sec-note {
  margin-left: auto;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ═══ NOW ═══ */
.now-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.now-card {
  background: var(--paper);
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background 0.3s;
  position: relative;
}

.now-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}

.now-card:hover {
  background: var(--paper-2);
}

.now-card:hover::before {
  transform: scaleX(1);
}

.now-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.now-state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
}

.now-card h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.now-card p {
  font-size: 13.5px;
  color: var(--ink-dim);
  line-height: 1.5;
}

.now-meta {
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
}

/* ═══ ARXIVS ═══
   注意：这里不再加玻璃底 —— 卡片层由 3D archive 阵列承担（照抄原版），
   HTML 只保留章节标题，否则两层卡片会互相遮挡。 */
section.arxivs {
  position: relative;
  z-index: 2;
  padding: clamp(64px, 10vh, 120px) var(--edge);
  max-width: var(--max);
  margin: 0 auto;
  border-top: 1px solid var(--line);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  /* 给 3D 卡片留出视觉空间 */
  min-height: 92vh;
}


   形式借鉴 rhine-lab-art 的 archive 陈列：卡片编号 + 字段 + 标签，
   但用 CSS 而非 WebGL —— 文字是原生 DOM，可选中、可读屏、可 Ctrl+F。 */
.arxiv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.arxiv-card {
  position: relative;
  background: var(--paper);
  padding: 26px 24px 22px;
  display: flex;
  gap: 20px;
  min-height: 250px;
  overflow: hidden;
  transition: background 0.35s var(--ease);
}

.arxiv-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, color-mix(in srgb, var(--accent) 7%, transparent) 100%);
  opacity: 0;
  transition: opacity 0.45s var(--ease);
  pointer-events: none;
}

.arxiv-card:hover {
  background: var(--paper-2);
}

.arxiv-card:hover::after {
  opacity: 1;
}

/* 左侧大编号 —— archive 的视觉锚点 */
.arxiv-code {
  flex: 0 0 auto;
  font-family: var(--font);
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: var(--ink-faint);
  transition: color 0.35s;
  user-select: none;
}

.arxiv-card:hover .arxiv-code {
  color: var(--accent);
}

.arxiv-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.arxiv-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.arxiv-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
}

.arxiv-status .dot {
  width: 4px;
  height: 4px;
}

.arxiv-card h3 {
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.arxiv-card p {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.5;
}

.arxiv-ledger {
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
}

.arxiv-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

/* ═══ NOTES ═══ */
.notes-list {
  list-style: none;
  border-top: 1px solid var(--line);
}

.note {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.4s var(--ease);
}

.note:hover {
  padding-left: 8px;
}

.note time {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.note-title {
  font-size: clamp(15px, 1.5vw, 19px);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.note:hover .note-title {
  color: var(--accent);
}

.note-kind {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}

/* ═══ CONTACT ═══ */
.contact {
  position: relative;
  z-index: 2;
  padding: clamp(80px, 14vh, 160px) var(--edge);
  border-top: 1px solid var(--line);
  max-width: var(--max);
  margin: 0 auto;
  background: color-mix(in srgb, var(--paper) 74%, transparent);
  backdrop-filter: blur(10px) saturate(1.12);
  -webkit-backdrop-filter: blur(10px) saturate(1.12);
}

.contact-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}

.contact h2 {
  font-size: clamp(32px, 6vw, 84px);
  font-weight: 750;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.contact-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.mail-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 22px;
  min-height: 44px;
  background: var(--accent);
  color: #0a0c0b;
  border: none;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.25s, transform 0.4s var(--ease);
}

.mail-btn:hover {
  background: var(--ink);
  transform: translateY(-2px);
}

.mail-btn.copied {
  background: var(--live);
}

.link-out {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 22px;
  min-height: 44px;
  border: 1px solid var(--line-bright);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color 0.25s, color 0.25s;
}

.link-out:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ═══ FOOTER ═══ */
.footer {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px var(--edge) calc(20px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.foot-mid {
  margin: 0 auto;
}

/* ═══ 入场动效 ═══ */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: calc(var(--d, 0) * 110ms);
}

[data-reveal].in {
  opacity: 1;
  transform: none;
}

.sec-head,
.now-card,
.work-card,
.note {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.sec-head.in,
.now-card.in,
.arxiv-card.in,
.note.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal], .sec-head, .now-card, .arxiv-card, .note {
    opacity: 1;
    transform: none;
  }
}

/* ═══ 响应式 ═══ */
@media (max-width: 1100px) {
  .arxiv-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 700px) {
  .arxiv-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  /* 手机端 3D 只占上半屏，避免压住所有文字 */
  .stage {
    height: 62svh;
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 8%, #000 62%, transparent 100%);
    mask-image: linear-gradient(180deg, transparent 0%, #000 8%, #000 62%, transparent 100%);
  }

  .hero::before {
    background:
      radial-gradient(ellipse 92% 34% at 50% 20%, rgba(10,12,11,0.72), transparent 74%),
      linear-gradient(180deg, rgba(10,12,11,0.3) 0%, rgba(10,12,11,0.55) 34%, rgba(10,12,11,0.95) 72%, var(--paper) 100%);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: start;
  }

  .hero-cta {
    justify-content: flex-start;
  }

  .hero-title h1 {
    font-size: clamp(46px, 16.5vw, 120px);
  }

  .hero-sub {
    font-size: 10px;
    letter-spacing: 0.1em;
    line-height: 1.7;
  }

  .hero-sub .latin {
    display: block;
    margin-left: 0;
    margin-top: 4px;
  }

  .hero-meta {
    margin-top: 8px;
  }

  .nav {
    display: none;
  }

  .note {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 6px 14px;
    row-gap: 6px;
  }

  .note time {
    grid-column: 1 / -1;
    order: -1;
  }

  .note-title {
    grid-column: 1;
  }

  .note-kind {
    grid-column: 2;
  }

  .contact-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .topbar {
    height: 56px;
    gap: 12px;
  }

  .clock {
    display: none;
  }

  .btn-pass {
    padding: 9px 14px;
  }

  .hero {
    padding-top: calc(56px + 28px);
  }

  .meta-cell {
    grid-template-columns: 72px minmax(0, 1fr);
    font-size: 11px;
  }

  .footer {
    flex-wrap: wrap;
    gap: 8px;
  }

  .foot-mid {
    margin: 0;
    width: 100%;
    order: 3;
  }
}

/* 手机安全区 */
@supports (padding: env(safe-area-inset-bottom)) {
  .footer {
    padding-bottom: calc(20px + env(safe-area-inset-bottom));
  }
}


/* ═══ 3D 加载指示 ═══ */
#loader {
  position: fixed;
  left: var(--edge);
  bottom: 84px;
  z-index: 40;
  width: min(240px, 42vw);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  pointer-events: none;
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

#loader.done {
  opacity: 0;
  transform: translateY(6px);
}

.loader-bar {
  height: 1px;
  background: var(--line-bright);
  margin-bottom: 8px;
  overflow: hidden;
}

.loader-bar i {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.4s var(--ease-glide);
}

.loader-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.loader-pct {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ═══════════════════════════════════════════════════════
   ARCHIVE 整站模式
   原版 rhine-lab-art：整站就是卡片阵列，滚动穿行。
   HTML 不再是卡片层，只保留 HUD（左下索引 / 右上模式 / 卡片标题）。
   ═══════════════════════════════════════════════════════ */

/* 滚动轨道：给相机穿行提供足够的滚动距离 */
.scroll-track {
  height: 500vh;
  pointer-events: none;
}

/* ── hero 改成叠加层 ── */
.hero {
  position: fixed;
  inset: 0;
  min-height: 100svh;
  padding: calc(64px + clamp(24px, 5vh, 56px)) var(--edge) clamp(48px, 8vh, 80px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  pointer-events: none;
  z-index: 2;
}

.hero > * {
  pointer-events: auto;
}

/* 首个 section 之后的滚动空间由 .scroll-track 提供 */
main {
  position: relative;
}

/* ── 左下索引（原站 "WHAT ARE YOU LOOKING FOR?"）── */
.index-nav {
  position: fixed;
  left: var(--edge);
  bottom: clamp(56px, 9vh, 96px);
  z-index: 5;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}

.index-nav.in {
  opacity: 1;
}

.index-title {
  margin-bottom: 12px;
  color: var(--ink-dim);
}

.index-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.index-nav a {
  color: var(--ink-faint);
  transition: color 0.25s, transform 0.35s var(--ease);
  display: inline-block;
}

.index-nav a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

/* ── 右上 HUD（原站 ARCHIVE / ABOUT 胶囊）── */
.hud-right {
  position: fixed;
  top: 82px;
  right: var(--edge);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(238, 241, 236, 0.14);
  background: rgba(10, 12, 11, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}

.hud-right.in {
  opacity: 1;
}

.hud-mode {
  color: var(--ink);
}

.hud-line {
  width: 42px;
  height: 1px;
  background: rgba(238, 241, 236, 0.28);
}

.hud-about {
  color: var(--ink-faint);
}

/* ── 卡片标题大字（原站 WORK THE DREAM 那种）── */
.card-title {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}

.card-title.in {
  opacity: 1;
}

.ct-code {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--accent);
}

.ct-name {
  font-size: clamp(28px, 5.2vw, 76px);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
  text-transform: uppercase;
  text-shadow: 0 6px 60px rgba(0, 0, 0, 0.75);
}

/* ── hero 内容在新布局下的间距 ── */
.hero-title {
  margin-bottom: auto;
  padding-top: clamp(40px, 10vh, 120px);
}

.hero-foot {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(20px, 3vw, 48px);
  align-items: end;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding-bottom: clamp(24px, 5vh, 56px);
}

.hero-foot .hero-meta {
  border-top: 1px solid var(--line);
}

.hero-foot .lede {
  max-width: 42ch;
  font-size: clamp(13px, 1.15vw, 16px);
}

@media (max-width: 900px) {
  .scroll-track {
    height: 400vh;
  }

  .hero {
    justify-content: flex-start;
    padding-top: calc(56px + 24px);
  }

  .hero-foot {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .index-nav {
    bottom: 20px;
    font-size: 8.5px;
  }

  .index-nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 10px;
  }

  .hud-right {
    top: 70px;
    padding: 8px 14px;
  }

  .ct-name {
    font-size: clamp(22px, 7vw, 40px);
  }
}