/* =========================================================
   site.css — 非凡娱乐 共享外壳
   轨道导航 · 编号系统 · 纸白阅读区
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p,
ul, ol, li,
figure, blockquote, dl, dd, pre { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video { max-width: 100%; height: auto; display: block; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a { color: inherit; }

[hidden] { display: none !important; }

#main-content { scroll-margin-top: 5rem; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #0B1B33;
  --ink-2: #12294D;
  --ink-3: #1B3A66;
  --amber: #F2A33A;
  --amber-soft: #FFD28A;
  --jade: #5FBFA6;
  --jade-soft: #C9F0E4;
  --paper: #F7F4EC;
  --paper-2: #EFE7D6;
  --slate: #2E3A4A;
  --fog: #6B7785;
  --coral: #E8664A;

  --rail-w: 282px;
  --gutter: clamp(1.1rem, 4vw, 2.5rem);
  --measure: 66ch;

  --r-sm: 6px;
  --r-md: 14px;
  --r-lg: 26px;

  --font-title: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: clamp(16px, 0.34vw + 15px, 18px);
  line-height: 1.75;
  color: var(--slate);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.015em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.4rem, 5.2vw, 4.4rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); line-height: 1.22; }
h3 { font-size: clamp(1.2rem, 1.8vw, 1.55rem); line-height: 1.3; }

p { text-wrap: pretty; }

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--jade);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- 4. Layout ---------- */
.container {
  width: calc(100% - (var(--gutter) * 2));
  max-width: 1120px;
  margin-inline: auto;
}

.section { padding-block: clamp(2rem, 4.5vw, 3.5rem); }

.band { padding-block: clamp(2.5rem, 6vw, 5rem); }
.band--paper { background: var(--paper); }
.band--paper-2 { background: var(--paper-2); }
.band--jade { background: var(--jade-soft); }
.band--ink { background: var(--ink); color: rgba(247, 244, 236, 0.82); }
.band--ink h1,
.band--ink h2,
.band--ink h3,
.band--ink h4 { color: var(--paper); }

.grid { display: grid; gap: clamp(1rem, 2.5vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }
.grid--aside { grid-template-columns: 1fr; }

@media (min-width: 900px) {
  .grid--aside { grid-template-columns: minmax(0, 1fr) minmax(220px, 0.42fr); }
}

/* ---------- 5. 文本组件 ---------- */
.lede {
  max-width: 60ch;
  font-size: clamp(1.04rem, 1.4vw, 1.22rem);
  line-height: 1.72;
  color: var(--slate);
}
.band--ink .lede { color: rgba(247, 244, 236, 0.8); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
}
.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 2px;
  background: var(--amber);
  flex: none;
}
.band--ink .eyebrow { color: rgba(247, 244, 236, 0.6); }

.num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding: 0.14rem 0.42rem;
  border: 1px solid rgba(242, 163, 58, 0.42);
  border-radius: 4px;
  background: rgba(242, 163, 58, 0.07);
}

.rule {
  border: 0;
  border-top: 1px dashed rgba(46, 58, 74, 0.28);
  margin-block: clamp(1.5rem, 3vw, 2.5rem);
}
.band--ink .rule { border-top-color: rgba(247, 244, 236, 0.22); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.tag--amber { color: #8a5410; background: rgba(242, 163, 58, 0.16); border-color: rgba(242, 163, 58, 0.45); }
.tag--jade { color: #1d6b57; background: rgba(95, 191, 166, 0.18); border-color: rgba(95, 191, 166, 0.5); }
.tag--coral { color: #a3381f; background: rgba(232, 102, 74, 0.14); border-color: rgba(232, 102, 74, 0.45); }

.prose {
  max-width: var(--measure);
  color: var(--slate);
  font-size: 1.01rem;
  line-height: 1.82;
}
.prose > * + * { margin-top: 1.05em; }
.prose h2 {
  margin-top: 2.1em;
  font-size: clamp(1.55rem, 2.3vw, 2.05rem);
}
.prose h3 { margin-top: 1.7em; }
.prose ul, .prose ol { list-style: revert; padding-left: 1.35em; }
.prose li + li { margin-top: 0.4em; }
.prose a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--jade);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.prose a:hover { background: var(--amber-soft); }
.band--ink .prose,
.band--ink .prose a { color: rgba(247, 244, 236, 0.85); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.94rem;
  letter-spacing: 0.02em;
  padding: 0.72rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease,
              color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn--amber {
  background: var(--amber);
  color: var(--ink);
  box-shadow: 0 3px 0 rgba(11, 27, 51, 0.35);
}
.btn--amber:hover {
  background: var(--amber-soft);
  box-shadow: 0 5px 0 rgba(11, 27, 51, 0.35);
}

.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(242, 163, 58, 0.55);
}
.btn--ghost:hover {
  background: rgba(242, 163, 58, 0.14);
  border-color: var(--amber);
  color: var(--amber-soft);
}

/* ---------- 7. 面包屑 ---------- */
.crumbs {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--fog);
  margin-bottom: 1.2rem;
}
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}
.crumbs__link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 191, 166, 0.7);
  padding-bottom: 1px;
}
.crumbs__link:hover { background: var(--amber-soft); }
.crumbs__sep { color: rgba(46, 58, 74, 0.35); }
.crumbs__current { color: var(--fog); }

/* ---------- 8. 图片容器基础 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid rgba(46, 58, 74, 0.14);
  background: var(--paper-2);
}
.media__frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--ink-2);
}
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--square .media__frame { aspect-ratio: 1 / 1; }
.media--tall .media__frame { aspect-ratio: 4 / 5; }

.media__frame > img,
.media__frame > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__ph {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 82% 12%, rgba(242, 163, 58, 0.5), transparent 55%),
    repeating-linear-gradient(135deg, rgba(201, 240, 228, 0.16) 0 10px, rgba(201, 240, 228, 0) 10px 20px),
    linear-gradient(150deg, #12294D 0%, #0B1B33 72%);
}
.media__ph::after {
  content: attr(data-label);
  position: absolute;
  left: 0.85rem;
  bottom: 0.72rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: rgba(247, 244, 236, 0.72);
}

.media__cap {
  display: block;
  padding: 0.62rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.69rem;
  letter-spacing: 0.06em;
  color: var(--fog);
  background: var(--paper);
  border-top: 1px dashed rgba(46, 58, 74, 0.2);
}

/* ---------- 9. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 0.6rem;
  z-index: 200;
  transform: translateY(-180%);
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.62rem 1.05rem;
  border-radius: var(--r-sm);
  text-decoration: none;
  box-shadow: 0 6px 18px -8px rgba(4, 12, 24, 0.85);
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 10. 头部轨道（移动端：顶部条 + 抽屉） ---------- */
.rail {
  --bar-h: 3.85rem;
  position: sticky;
  top: 0;
  z-index: 90;
  color: var(--paper);
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
  border-bottom: 1px solid rgba(242, 163, 58, 0.3);
}

.rail__bar {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-height: var(--bar-h);
  padding: 0.55rem var(--gutter);
}

.rail__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 1 1 auto;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: var(--r-sm);
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.12rem;
  transform: rotate(-3deg);
  box-shadow: 2px 2px 0 rgba(4, 12, 24, 0.55);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.15;
}
.brand-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.04rem;
  letter-spacing: 0.03em;
  color: var(--paper);
  white-space: nowrap;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.13em;
  color: rgba(247, 244, 236, 0.5);
  white-space: nowrap;
}

.version-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.06em;
  padding: 0.28rem 0.52rem;
  border: 1px solid rgba(95, 191, 166, 0.45);
  border-radius: 999px;
  color: var(--jade-soft);
  background: rgba(95, 191, 166, 0.1);
  white-space: nowrap;
}
.version-chip__dot {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(95, 191, 166, 0.2);
  animation: chip-breathe 3.6s ease-in-out infinite;
}
@keyframes chip-breathe {
  0%, 100% { box-shadow: 0 0 0 3px rgba(95, 191, 166, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(95, 191, 166, 0.06), 0 0 12px rgba(95, 191, 166, 0.55); }
}

.rail__toggle {
  flex: none;
  display: grid;
  place-items: center;
  gap: 4px;
  width: 2.6rem;
  height: 2.6rem;
  padding: 0;
  border: 1px solid rgba(242, 163, 58, 0.45);
  border-radius: var(--r-sm);
  background: rgba(242, 163, 58, 0.08);
  cursor: pointer;
}
.rail__toggle:hover { background: rgba(242, 163, 58, 0.18); }

.toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--amber);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.rail[data-open="true"] .rail__toggle .toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.rail[data-open="true"] .rail__toggle .toggle-bar:nth-child(2) { opacity: 0; transform: scaleX(0.2); }
.rail[data-open="true"] .rail__toggle .toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.rail__scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(6, 16, 30, 0.62);
}

.rail__drawer { display: none; }

/* 移动端抽屉打开 */
@media (max-width: 1023.98px) {
  .rail[data-open="true"] .rail__drawer {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 85;
    max-height: calc(100dvh - var(--bar-h) - 0.5rem);
    overflow-y: auto;
    padding: 0.5rem var(--gutter) 1.5rem;
    background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
    border-bottom: 1px solid rgba(242, 163, 58, 0.35);
    box-shadow: 0 28px 44px -26px rgba(4, 12, 24, 0.95);
  }
  body.has-drawer { overflow: hidden; }
}

/* 导航列表（两端共用样式） */
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}
.nav-item { display: block; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.7rem 0.6rem;
  border-radius: var(--r-sm);
  border-left: 3px solid transparent;
  color: rgba(247, 244, 236, 0.82);
  text-decoration: none;
  transition: background-color 0.18s ease, color 0.18s ease,
              border-color 0.18s ease, transform 0.18s ease;
}
.nav-link:hover {
  background: rgba(242, 163, 58, 0.12);
  border-left-color: var(--amber);
  color: var(--paper);
  transform: translateX(2px);
}
.nav-link__num {
  flex: none;
  width: 1.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--amber);
}
.nav-link__label {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.97rem;
  letter-spacing: 0.015em;
}

.nav-link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(242, 163, 58, 0.24), rgba(242, 163, 58, 0.02));
  border-left-color: var(--amber);
  color: #fff;
}
.nav-link[aria-current="page"] .nav-link__num { color: var(--amber-soft); }
.nav-link[aria-current="page"] .nav-link__label { color: var(--amber-soft); }
.nav-link[aria-current="page"]::after {
  content: "当前";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  color: var(--jade);
  border: 1px solid rgba(95, 191, 166, 0.5);
  border-radius: 3px;
  padding: 0.04rem 0.3rem;
}

.rail__foot {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-top: 1.3rem;
  padding-top: 1.1rem;
  border-top: 1px dashed rgba(247, 244, 236, 0.2);
}
.rail__note {
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.58);
}
.rail__cta { width: 100%; }
.rail__meta {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  color: rgba(247, 244, 236, 0.4);
}

.progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: rgba(247, 244, 236, 0.09);
  pointer-events: none;
}
.progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--jade), var(--amber));
  transition: width 0.12s linear;
}

/* 桌面端：左侧固定轨道 */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  .rail {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: var(--rail-w);
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-bottom: 0;
    border-right: 1px solid rgba(242, 163, 58, 0.24);
    box-shadow: inset -1px 0 0 rgba(95, 191, 166, 0.1);
  }

  .rail__bar {
    flex-wrap: wrap;
    gap: 0.65rem;
    padding: 1.6rem 1.25rem 1rem;
    min-height: 0;
  }
  .rail__brand { flex: 1 1 100%; }
  .brand-sub { font-size: 0.63rem; }
  .rail__toggle { display: none; }
  .version-chip { margin-left: 0.05rem; }

  .rail__drawer {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
    position: static;
    max-height: none;
    overflow: visible;
    padding: 0 1.05rem 1.35rem;
    background: transparent;
    border: 0;
    box-shadow: none;
  }

  .rail__nav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding-right: 0.25rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(242, 163, 58, 0.45) transparent;
  }
  .rail__nav::-webkit-scrollbar { width: 4px; }
  .rail__nav::-webkit-scrollbar-thumb {
    background: rgba(242, 163, 58, 0.4);
    border-radius: 4px;
  }

  .nav-link { padding: 0.6rem 0.6rem; }
  .rail__scrim { display: none; }
  .progress { height: 4px; }
}

/* ---------- 11. 页脚（档案盒） ---------- */
.foot {
  position: relative;
  overflow: hidden;
  padding: clamp(2.6rem, 6vw, 4.5rem) 0 1.4rem;
  background: linear-gradient(180deg, #0B1B33 0%, #081426 100%);
  color: rgba(247, 244, 236, 0.78);
  border-top: 3px solid var(--amber);
}
.foot::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 240px at 10% 0%, rgba(242, 163, 58, 0.15), transparent 72%),
    radial-gradient(520px 220px at 90% 8%, rgba(95, 191, 166, 0.13), transparent 70%);
}

.foot__grid {
  position: relative;
  display: grid;
  gap: clamp(1.8rem, 3.5vw, 2.6rem);
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .foot__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .foot__grid { grid-template-columns: 1.25fr 0.72fr 0.72fr 1.1fr; }
}

.foot__brand { display: flex; flex-direction: column; align-items: flex-start; gap: 0.85rem; }
.foot__home {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--paper);
}
.foot__name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}
.foot__tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--jade);
}
.foot__text {
  max-width: 30ch;
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(247, 244, 236, 0.6);
}
.foot__cta { margin-top: 0.25rem; }

.foot__col { display: block; }
.foot__title {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--amber);
  padding-bottom: 0.6rem;
  margin-bottom: 0.9rem;
  border-bottom: 1px dashed rgba(247, 244, 236, 0.22);
}
.foot__list { display: grid; gap: 0.42rem; }
.foot__link {
  display: inline-block;
  padding-block: 0.12rem;
  font-size: 0.92rem;
  color: rgba(247, 244, 236, 0.78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.foot__link:hover {
  color: var(--amber-soft);
  border-bottom-color: var(--jade);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  margin-bottom: 0.85rem;
}
.contact-item__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: rgba(247, 244, 236, 0.42);
}
.contact-item__value {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.86);
  word-break: break-word;
}

.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 0.12rem 0.45rem;
  border: 1px solid rgba(95, 191, 166, 0.45);
  border-radius: 999px;
  background: transparent;
  color: var(--jade);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.copy-btn:hover { background: rgba(95, 191, 166, 0.16); color: var(--jade-soft); }
.copy-btn[data-copied="true"] { color: var(--amber-soft); border-color: var(--amber); }
.copy-btn[data-copied="false"] { color: var(--coral); border-color: rgba(232, 102, 74, 0.6); }

.foot__icp {
  display: inline-block;
  margin-top: 0.7rem;
  padding: 0.32rem 0.55rem;
  border: 1px dashed rgba(247, 244, 236, 0.22);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: rgba(247, 244, 236, 0.55);
}

.foot__bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.4rem;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.05rem;
  border-top: 1px solid rgba(247, 244, 236, 0.14);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: rgba(247, 244, 236, 0.45);
}
.foot__copy { line-height: 1.6; }

/* ---------- 12. 减少动态 ---------- */
@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;
  }
  .progress__bar { transition: none; }
  .btn:hover,
  .nav-link:hover { transform: none; }
}