/* ==========================================================================
   pg麻将胡了 — /assets/site.css
   共享层：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================================== */

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

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

body { margin: 0; }

h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --bone: #F6F1E4;
  --paper: #E4DCC8;
  --jade: #0F5B4E;
  --jade-deep: #083A32;
  --jade-pale: #D8E6DD;
  --cinnabar: #C23B2A;
  --gold: #C9A24A;
  --ink: #122333;
  --mist: #8A9A8F;
  --white: #FFFFFF;

  --line: rgba(18, 35, 51, 0.14);
  --line-strong: rgba(18, 35, 51, 0.3);
  --line-gold: rgba(201, 162, 74, 0.42);
  --line-light: rgba(246, 241, 228, 0.16);

  --shadow-1: 0 10px 26px -20px rgba(8, 58, 50, 0.55);
  --shadow-2: 0 22px 46px -28px rgba(8, 58, 50, 0.7);

  --cut: 22px;
  --cut-sm: 12px;
  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 56px);

  --dur: 0.16s;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);

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

/* ---------- 3. 中文排版与页面底 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--bone);
  background-image:
    radial-gradient(1100px 560px at 88% -12%, rgba(216, 230, 221, 0.72), transparent 70%),
    radial-gradient(760px 420px at -8% 108%, rgba(201, 162, 74, 0.1), transparent 72%),
    repeating-linear-gradient(0deg, rgba(18, 35, 51, 0.024) 0 1px, transparent 1px 30px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
  color: var(--jade-deep);
}

h1 { font-size: clamp(2.6rem, 5vw, 4.8rem); }
h2 { font-size: clamp(1.8rem, 2.6vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 1.4vw, 1.35rem); }

p { max-width: 68ch; }

strong { font-weight: 700; color: var(--jade-deep); }

::selection {
  background: var(--jade);
  color: var(--bone);
}

/* ---------- 4. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
  border-radius: 2px;
}

[id="main-content"] { scroll-margin-top: 96px; }

.skip-link {
  position: fixed;
  left: 12px;
  top: 10px;
  z-index: 400;
  padding: 10px 18px;
  background: var(--cinnabar);
  color: var(--white);
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  border-radius: 3px;
  box-shadow: var(--shadow-2);
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(36px, 5.4vw, 76px);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
}

.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--offset > *:nth-child(even) {
  transform: translateY(24px);
}

@media (max-width: 720px) {
  .grid--2 { grid-template-columns: 1fr; }
  .grid--offset > *:nth-child(even) { transform: none; }
}

.rule {
  height: 1px;
  border: 0;
  margin-block: clamp(20px, 3vw, 34px);
  background: var(--line);
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bone);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.75);
}

.site-header__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 12px var(--gutter);
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.brand__link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}

.brand__tile {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.16rem;
  line-height: 1;
  color: var(--bone);
  background: linear-gradient(150deg, var(--jade) 0%, var(--jade-deep) 100%);
  border: 1px solid var(--gold);
  clip-path: polygon(0 0, calc(100% - 13px) 0, 100% 13px, 100% 100%, 13px 100%, 0 calc(100% - 13px));
  box-shadow: 0 10px 20px -14px rgba(8, 58, 50, 0.9);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.brand__link:hover .brand__tile,
.brand__link:focus-visible .brand__tile {
  transform: translateY(-1px) rotate(-2deg);
  border-color: var(--cinnabar);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.22rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--jade-deep);
  white-space: nowrap;
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
}

.brand__index {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--mist);
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  white-space: nowrap;
}

@media (max-width: 1180px) {
  .brand__index { display: none; }
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--white);
  color: var(--jade-deep);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--jade); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--jade);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--cinnabar);
  background: var(--jade-pale);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 20px);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1vw, 12px);
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 11px 9px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  border-radius: 2px;
  transition: color var(--dur) var(--ease);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--gold);
  transition: color var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 9px;
  right: 9px;
  bottom: 3px;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.site-nav__link:hover { color: var(--jade); }

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--jade-deep);
  font-weight: 800;
}

.site-nav__link[aria-current="page"] .site-nav__num { color: var(--cinnabar); }

.site-nav__cta { white-space: nowrap; }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
  pointer-events: none;
  z-index: 2;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--jade) 0%, var(--gold) 62%, var(--cinnabar) 100%);
  transition: width 0.1s linear;
}

/* 移动端导航 */
@media (max-width: 920px) {
  .nav-toggle { display: inline-flex; }

  .site-header__inner { padding-block: 10px; min-height: 68px; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px var(--gutter) 20px;
    background: var(--bone);
    border-top: 1px solid var(--line);
    border-bottom: 2px solid var(--jade);
    box-shadow: 0 22px 40px -26px rgba(8, 58, 50, 0.65);
    max-height: calc(100vh - 68px);
    overflow-y: auto;
  }

  .site-nav[data-open] { display: flex; }

  .site-nav__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 13px 8px;
    font-size: 1rem;
    border-bottom: 1px solid rgba(18, 35, 51, 0.08);
    border-radius: 0;
  }

  .site-nav__link::after {
    left: 8px;
    right: 8px;
    bottom: 0;
  }

  .site-nav__cta {
    width: 100%;
    margin-top: 16px;
  }
}

@media (max-width: 520px) {
  .brand__tagline { display: none; }
  .brand__tile { width: 40px; height: 40px; font-size: 1.02rem; }
  .brand__name { font-size: 1.1rem; }
  .site-nav__list { grid-template-columns: 1fr; }
}

/* ---------- 7. 按钮 ---------- */
.btn {
  --btn-bg: var(--jade);
  --btn-fg: var(--bone);
  --btn-bd: var(--jade);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--btn-bd);
  border-radius: var(--cut-sm) 2px var(--cut-sm) 2px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn:hover {
  --btn-bg: var(--jade-deep);
  --btn-bd: var(--cinnabar);
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.btn:active { transform: translateY(0); }

.btn--cinnabar {
  --btn-bg: var(--cinnabar);
  --btn-bd: var(--cinnabar);
  --btn-fg: var(--white);
}

.btn--cinnabar:hover {
  --btn-bg: #A62F21;
  --btn-bd: var(--jade-deep);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-bd: var(--line-strong);
  --btn-fg: var(--jade-deep);
}

.btn--ghost:hover {
  --btn-bg: var(--jade-pale);
  --btn-bd: var(--jade);
  box-shadow: none;
}

.btn--sm {
  padding: 9px 15px;
  font-size: 0.84rem;
  border-radius: 9px 2px 9px 2px;
}

/* ---------- 8. 文字与章节组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--jade);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1.02rem, 1.3vw, 1.16rem);
  line-height: 1.75;
  color: rgba(18, 35, 51, 0.82);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.section-head__title {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  color: var(--jade-deep);
}

.section-head__text {
  max-width: 46ch;
  font-size: 0.94rem;
  color: rgba(18, 35, 51, 0.72);
}

/* ---------- 9. 卡片 ---------- */
.tile-card {
  position: relative;
  padding: clamp(18px, 2vw, 26px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--cut) 3px var(--cut) 3px;
  box-shadow: var(--shadow-1);
  transition:
    transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease),
    border-color 0.18s var(--ease),
    background 0.18s var(--ease);
}

.tile-card:hover,
.tile-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(15, 91, 78, 0.45);
  box-shadow: var(--shadow-2);
}

.tile-card--alt {
  background: var(--paper);
  border-radius: 3px var(--cut) 3px var(--cut);
}

.tile-card--jade {
  background: linear-gradient(160deg, var(--jade) 0%, var(--jade-deep) 100%);
  border-color: transparent;
  color: var(--bone);
}

.tile-card--jade:hover,
.tile-card--jade:focus-within {
  border-color: var(--gold);
}

.tile-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.tile-card__index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.tile-card__title {
  font-size: clamp(1.08rem, 1.4vw, 1.28rem);
  color: inherit;
  margin-bottom: 6px;
}

.tile-card__text {
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(18, 35, 51, 0.76);
  max-width: none;
}

.tile-card--jade .tile-card__text { color: rgba(246, 241, 228, 0.84); }

.tile-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed rgba(18, 35, 51, 0.16);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--mist);
}

.tile-card--jade .tile-card__meta {
  border-top-color: rgba(201, 162, 74, 0.4);
  color: rgba(246, 241, 228, 0.66);
}

/* ---------- 10. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(15, 91, 78, 0.18);
  background: var(--jade-pale);
  color: var(--jade);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.tag--gold {
  background: rgba(201, 162, 74, 0.16);
  border-color: rgba(201, 162, 74, 0.42);
  color: #7F6318;
}

.tag--cinnabar {
  background: rgba(194, 59, 42, 0.1);
  border-color: rgba(194, 59, 42, 0.32);
  color: var(--cinnabar);
}

/* ---------- 11. 图片容器（供页面阶段放占位） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  display: block;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--cut) 3px var(--cut) 3px;
  background-color: var(--paper);
  background-image:
    linear-gradient(135deg, rgba(15, 91, 78, 0.16), rgba(201, 162, 74, 0.14) 62%, rgba(194, 59, 42, 0.1)),
    repeating-linear-gradient(45deg, rgba(18, 35, 51, 0.05) 0 2px, transparent 2px 11px);
}

.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame--square {
  aspect-ratio: 1 / 1;
  border-radius: 3px var(--cut) 3px var(--cut);
}

.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--bone);
  background: linear-gradient(180deg, rgba(8, 58, 50, 0), rgba(8, 58, 50, 0.86));
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb { padding-block: 16px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-strong);
}

.breadcrumb__link {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid rgba(15, 91, 78, 0.25);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.breadcrumb__link:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* ---------- 13. 动效协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--jade-deep);
  color: var(--paper);
  border-top: 3px solid var(--gold);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(135deg, rgba(201, 162, 74, 0.07) 0 1px, transparent 1px 22px),
    radial-gradient(680px 320px at 92% 0%, rgba(15, 91, 78, 0.6), transparent 70%);
}

.site-footer__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(34px, 4.6vw, 62px) var(--gutter) clamp(24px, 3vw, 38px);
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  grid-template-columns: minmax(210px, 1.5fr) minmax(120px, 0.9fr) minmax(120px, 0.9fr) minmax(220px, 1.3fr) minmax(180px, 1fr);
}

.site-footer__brand { min-width: 0; }

.site-footer__brandlink {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.42rem;
  letter-spacing: -0.01em;
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.site-footer__brandlink:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.site-footer__note {
  margin-top: 12px;
  max-width: 30ch;
  font-size: 0.9rem;
  line-height: 1.72;
  color: rgba(228, 220, 200, 0.74);
}

.site-footer__seal {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-top: 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--cinnabar);
  border: 1px solid rgba(194, 59, 42, 0.72);
  border-radius: 50%;
  background: rgba(194, 59, 42, 0.1);
  transform: rotate(-8deg);
}

.footer-col { min-width: 0; }

.footer-col__title {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--gold);
  margin-bottom: 14px;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(201, 162, 74, 0.3);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-col__link {
  display: inline-block;
  padding: 5px 0;
  font-size: 0.92rem;
  color: rgba(228, 220, 200, 0.9);
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer-col__link:hover,
.footer-col__link:focus-visible {
  color: var(--bone);
  transform: translateX(3px);
}

.footer-col__text {
  font-size: 0.88rem;
  line-height: 1.72;
  color: rgba(228, 220, 200, 0.82);
  max-width: 34ch;
}

.footer-col__text--muted {
  margin-top: 10px;
  color: rgba(228, 220, 200, 0.58);
  font-size: 0.82rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact__row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  color: rgba(228, 220, 200, 0.52);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--bone);
  word-break: break-word;
}

.footer-contact__value--text {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: rgba(246, 241, 228, 0.92);
}

.site-footer__legal {
  position: relative;
  border-top: 1px solid rgba(201, 162, 74, 0.26);
  background: rgba(0, 0, 0, 0.2);
}

.site-footer__legal-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 15px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
}

.site-footer__legal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.site-footer__legal-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: rgba(228, 220, 200, 0.88);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.site-footer__legal-link:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.site-footer__icp,
.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(228, 220, 200, 0.62);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid rgba(201, 162, 74, 0.42);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.to-top:hover {
  background: rgba(201, 162, 74, 0.16);
  color: var(--bone);
  border-color: var(--gold);
}

@media (max-width: 1080px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .site-footer__legal-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 15. 减少动态偏好 ---------- */
@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;
    scroll-behavior: auto !important;
  }

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

  .tile-card:hover,
  .tile-card:focus-within,
  .btn:hover,
  .footer-col__link:hover {
    transform: none;
  }
}