/* ============================================================
   HTH华体会竞界 · /assets/site.css
   创意定位：竞技场光影 × 编辑目录 × 精密网格 × 锐利直角
   ============================================================ */

/* ---------- 0. 设计令牌 ---------- */
:root {
  --color-primary: #A3120E;
  --color-gold: #C9A137;
  --color-dark: #1F1B16;
  --color-cream: #F5EFE2;
  --color-green: #3FF23F;
  --color-orange: #E8542A;
  --color-paper: #FFF8F0;
  --color-gray: #3A3A3A;
  --color-line: #D0D0D0;
  --color-wood: #6B5A4E;

  --font-headline: Impact, "Arial Black", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "Courier New", Consolas, monospace;

  --container-width: 1280px;
  --header-height: 74px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
  --speed: 0.22s ease;
}

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--color-dark);
  color: var(--color-paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
}
ul,
ol {
  list-style: none;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headline);
  line-height: 1.18;
  letter-spacing: 0.02em;
  text-wrap: balance;
}
p {
  text-wrap: pretty;
}
button {
  font: inherit;
}
::selection {
  background: var(--color-primary);
  color: var(--color-cream);
}

/* ---------- 2. 全局焦点 ---------- */
:focus-visible {
  outline: 3px solid var(--color-green);
  outline-offset: 3px;
}
.site-main :focus-visible {
  outline-color: var(--color-primary);
}
.section--dark :focus-visible,
.section--red :focus-visible {
  outline-color: var(--color-green);
}

/* ---------- 3. 容器与主区 ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}
.site-main {
  background-color: var(--color-cream);
  color: var(--color-gray);
  min-height: 55vh;
}
.site-main h1,
.site-main h2,
.site-main h3 {
  color: var(--color-dark);
}
.section {
  padding-block: clamp(48px, 8vw, 112px);
}
.section--tight {
  padding-block: clamp(24px, 4vw, 48px);
}
.section--cream {
  background-color: var(--color-cream);
  color: var(--color-gray);
}
.section--dark {
  background-color: var(--color-dark);
  color: var(--color-paper);
}
.section--red {
  background-color: var(--color-primary);
  color: var(--color-cream);
}
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--red h1,
.section--red h2,
.section--red h3 {
  color: var(--color-cream);
}
.section--dark a,
.section--red a {
  color: var(--color-gold);
}

/* ---------- 4. 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border: 0;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--speed), color var(--speed), transform var(--speed);
}
.btn:active {
  transform: translateY(1px);
}
.btn::after {
  content: "→";
  margin-left: 6px;
  font-family: var(--font-data);
  font-size: 16px;
  transition: transform var(--speed);
}
.btn:hover::after {
  transform: translateX(3px);
}
.btn--primary {
  background: var(--color-primary);
  border-left: 4px solid var(--color-gold);
  color: var(--color-cream);
}
.btn--primary:hover {
  background: var(--color-orange);
  color: var(--color-cream);
}
.btn--gold {
  background: var(--color-gold);
  border-left: 4px solid var(--color-primary);
  color: var(--color-dark);
}
.btn--gold:hover {
  background: var(--color-cream);
}
.btn--outline {
  background: transparent;
  box-shadow: inset 0 0 0 2px var(--color-primary);
  color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-cream);
}
.btn--outline-light {
  background: transparent;
  box-shadow: inset 0 0 0 2px var(--color-gold);
  color: var(--color-paper);
}
.btn--outline-light:hover {
  background: var(--color-gold);
  color: var(--color-dark);
}

/* ---------- 5. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.4;
  color: var(--color-cream);
  background: var(--color-primary);
}
.tag::before {
  content: "◆";
  font-size: 8px;
}
.tag--gold {
  background: var(--color-gold);
  color: var(--color-dark);
}
.tag--outline {
  background: transparent;
  box-shadow: inset 0 0 0 1px var(--color-primary);
  color: var(--color-primary);
}
.tag--outline::before {
  content: "●";
}
.tag--green {
  background: var(--color-green);
  color: var(--color-dark);
}
.tag--green::before {
  content: "●";
}

/* ---------- 6. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: clamp(24px, 4vw, 40px);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li:not(:last-child)::after {
  content: "/";
  color: var(--color-line);
}
.breadcrumbs a {
  color: var(--color-primary);
}
.breadcrumbs a:hover {
  text-decoration: underline;
}
.breadcrumbs [aria-current="page"] {
  color: var(--color-gray);
  font-weight: 600;
}

/* ---------- 7. 编辑目录标题组 ---------- */
.section-head {
  margin-bottom: clamp(24px, 4vw, 44px);
}
.section-head__index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--color-primary);
}
.section-head__index::before {
  content: "// ";
  color: var(--color-gold);
}
.section-head__title {
  font-size: clamp(26px, 3.6vw, 44px);
  letter-spacing: 0.04em;
  color: var(--color-dark);
}
.section-head__sub {
  margin-top: 10px;
  max-width: 60ch;
  font-size: 14px;
  color: var(--color-gray);
}
.section-head--dark .section-head__title {
  color: var(--color-cream);
}
.section-head--dark .section-head__sub {
  color: var(--color-line);
}
.section-head--dark .section-head__index,
.section-head--red .section-head__index {
  color: var(--color-gold);
}
.section-head--red .section-head__title {
  color: var(--color-cream);
}
.section-head--red .section-head__sub {
  color: rgba(255, 248, 240, 0.82);
}

/* ---------- 8. 卡片 ---------- */
.card {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  transition: box-shadow var(--speed), transform var(--speed);
}
.card:hover {
  box-shadow: 8px 8px 0 rgba(163, 18, 14, 0.16);
  transform: translate(-2px, -2px);
}
.card--dark {
  background: var(--color-dark);
  border-color: #2e2922;
  color: var(--color-paper);
}
.card--dark:hover {
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.35);
}
.card--red {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-cream);
}
.card--red:hover {
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.25);
}
.card--gold-accent {
  border-top: 4px solid var(--color-gold);
}
.card__title {
  margin-bottom: 10px;
  font-size: clamp(18px, 2.2vw, 24px);
}
.card__meta {
  margin-bottom: 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.card__desc {
  font-size: 15px;
  color: var(--color-gray);
}
.card--red .card__desc {
  color: rgba(255, 248, 240, 0.85);
}
.card--dark .card__desc {
  color: var(--color-line);
}

/* ---------- 9. 媒体占位容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background-color: var(--color-dark);
  background-image: repeating-linear-gradient(-45deg, rgba(201, 161, 55, 0.06) 0 10px, transparent 10px 20px);
}
.media--4-3 {
  aspect-ratio: 4 / 3;
}
.media--1-1 {
  aspect-ratio: 1 / 1;
}
.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 24px;
  text-align: center;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(245, 239, 226, 0.6);
  background-image: linear-gradient(45deg, transparent 45%, rgba(201, 161, 55, 0.1) 45% 55%, transparent 55%);
}

/* ---------- 10. 正文排版 ---------- */
.prose {
  max-width: 68ch;
}
.prose > * + * {
  margin-top: 1em;
}
.prose h2 {
  margin-top: 1.8em;
  padding-left: 14px;
  border-left: 4px solid var(--color-gold);
  font-size: clamp(22px, 2.6vw, 30px);
}
.prose h3 {
  margin-top: 1.4em;
  font-size: clamp(18px, 2vw, 22px);
}
.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:hover {
  color: var(--color-orange);
}
.prose strong {
  font-weight: 700;
  color: var(--color-primary);
}
.prose ul {
  padding-left: 1.2em;
  list-style: square;
}
.prose li {
  margin-block: 0.4em;
}
.prose li::marker {
  color: var(--color-primary);
}

/* ---------- 11. 框景与速度线 ---------- */
.frame {
  position: relative;
  padding: clamp(24px, 4vw, 44px);
  border: 2px solid var(--color-gold);
}
.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 0 solid var(--color-primary);
}
.frame::before {
  top: -2px;
  left: -2px;
  border-top-width: 5px;
  border-left-width: 5px;
}
.frame::after {
  right: -2px;
  bottom: -2px;
  border-right-width: 5px;
  border-bottom-width: 5px;
}
.frame--dark {
  border-color: var(--color-primary);
}
.frame--dark::before,
.frame--dark::after {
  border-color: var(--color-gold);
}
.speed-lines {
  position: relative;
}
.speed-lines::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(-55deg, transparent 0 16px, rgba(201, 161, 55, 0.06) 16px 17px);
}

/* ---------- 12. 可展开组 ---------- */
.disclose {
  margin-block: 12px;
  background: var(--color-paper);
  border-left: 4px solid var(--color-gold);
  box-shadow: 0 0 0 1px var(--color-line);
}
.disclose__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
}
.disclose__head::-webkit-details-marker {
  display: none;
}
.disclose__head:hover {
  background: rgba(201, 161, 55, 0.1);
}
.disclose__num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-primary);
}
.disclose__title {
  flex: 1;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-gray);
}
.disclose__mark {
  font-family: var(--font-data);
  font-size: 20px;
  line-height: 1;
  color: var(--color-gold);
  transition: transform var(--speed);
}
.disclose[open] .disclose__mark {
  transform: rotate(45deg);
}
.disclose__body {
  padding: 0 22px 20px 48px;
  font-size: 15px;
  color: var(--color-gray);
}
.disclose[open] .disclose__body {
  animation: disclose-in 0.25s ease;
}
@keyframes disclose-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 13. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background-color: var(--color-dark);
  border-bottom: 1px solid rgba(201, 161, 55, 0.35);
}
.site-header::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0 32%, var(--color-gold) 32% 100%);
}
.site-header[data-nav-open="true"] {
  z-index: 960;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 40px);
  min-height: var(--header-height);
}

/* ---------- 14. 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  background: var(--color-primary);
  border: 2px solid var(--color-gold);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.35);
  color: var(--color-cream);
  font-family: var(--font-headline);
  font-size: 20px;
  letter-spacing: 0.04em;
  transition: background-color var(--speed), color var(--speed);
}
.brand:hover .brand__mark {
  background: var(--color-gold);
  color: var(--color-dark);
}
.brand__text {
  display: grid;
  gap: 2px;
}
.brand__name {
  font-family: var(--font-headline);
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: var(--color-cream);
}
.brand__tagline {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--color-gold);
}

/* ---------- 15. 导航按钮（移动端） ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 6px;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--color-paper);
  font-size: 14px;
  font-weight: 700;
}
.nav-toggle__box {
  position: relative;
  display: block;
  width: 26px;
  height: 18px;
}
.nav-toggle__line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-gold);
  transition: top 0.24s ease, transform 0.24s ease, opacity 0.2s ease, width 0.24s ease;
}
.nav-toggle__line:nth-child(1) {
  top: 0;
}
.nav-toggle__line:nth-child(2) {
  top: 8px;
}
.nav-toggle__line:nth-child(3) {
  top: 16px;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  top: 8px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  top: 8px;
  transform: rotate(-45deg);
}
.nav-toggle__label {
  letter-spacing: 0.1em;
}

/* ---------- 16. 主导航（桌面） ---------- */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.4vw, 6px);
}
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  white-space: nowrap;
  color: var(--color-paper);
  transition: color var(--speed);
}
.site-nav__link:hover {
  color: var(--color-gold);
}
.site-nav__index {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0;
  color: var(--color-gold);
}
.site-nav__name {
  letter-spacing: 0.03em;
}
.site-nav__link[aria-current="page"] {
  background: var(--color-primary);
  color: var(--color-cream);
}
.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--color-gold);
}
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 14px;
  height: 14px;
  background: var(--color-dark);
  clip-path: polygon(0 0, 100% 100%, 0 100%);
}
.site-nav__heading {
  display: none;
}
.site-nav__meta {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: 22px;
  padding-left: 22px;
  border-left: 1px solid rgba(201, 161, 55, 0.3);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: var(--color-line);
}
.site-nav__status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 8px rgba(63, 242, 63, 0.8);
  animation: status-pulse 2s ease infinite;
}
@keyframes status-pulse {
  0%,
  100% {
    box-shadow: 0 0 4px rgba(63, 242, 63, 0.5);
  }
  50% {
    box-shadow: 0 0 12px rgba(63, 242, 63, 1);
  }
}
.site-nav__version {
  letter-spacing: 0.02em;
}
@media (min-width: 1200px) {
  .site-nav__meta {
    display: inline-flex;
  }
}

/* ---------- 17. 主导航（移动端抽屉） ---------- */
.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 920;
  background: rgba(18, 15, 12, 0.74);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.nav-backdrop[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}
html.nav-locked {
  overflow: hidden;
}

@media (max-width: 1023px) {
  .nav-toggle {
    display: inline-flex;
  }
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 950;
    display: flex;
    flex-direction: column;
    width: min(380px, 92vw);
    padding: 96px 28px 28px;
    background: #17130f;
    background-image: repeating-linear-gradient(-55deg, transparent 0 18px, rgba(201, 161, 55, 0.04) 18px 19px);
    border-left: 4px solid var(--color-primary);
    box-shadow: -24px 0 48px rgba(0, 0, 0, 0.4);
    transform: translateX(105%);
    transition: transform 0.28s ease;
  }
  .site-nav[data-open="true"] {
    transform: translateX(0);
  }
  .site-nav__heading {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: 16px;
    margin-bottom: 14px;
    border-bottom: 2px solid rgba(201, 161, 55, 0.45);
  }
  .site-nav__heading-title {
    font-family: var(--font-headline);
    font-size: 22px;
    letter-spacing: 0.1em;
    color: var(--color-gold);
  }
  .site-nav__heading-sub {
    font-family: var(--font-data);
    font-size: 11px;
    letter-spacing: 0.3em;
    color: var(--color-line);
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow-y: auto;
  }
  .site-nav__item {
    border-bottom: 1px solid rgba(201, 161, 55, 0.16);
  }
  .site-nav__link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 6px;
    font-size: 17px;
    color: var(--color-paper);
  }
  .site-nav__link:hover {
    background: rgba(201, 161, 55, 0.06);
    color: var(--color-gold);
  }
  .site-nav__link[aria-current="page"] {
    background: transparent;
    color: var(--color-cream);
  }
  .site-nav__link[aria-current="page"]::before {
    top: 0;
    bottom: 0;
    left: auto;
    right: 0;
    width: 4px;
  }
  .site-nav__link[aria-current="page"]::after {
    display: none;
  }
  .site-nav__index {
    font-size: 11px;
  }
  .site-nav__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: auto 0 0;
    padding: 20px 0 0;
    border-top: 1px solid rgba(201, 161, 55, 0.16);
    border-left: 0;
  }
}

/* ---------- 18. 滚动进度与返回顶部 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 990;
  background: linear-gradient(90deg, var(--color-green), var(--color-gold), var(--color-orange));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 800;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--color-primary);
  border: 0;
  color: var(--color-cream);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, background-color 0.2s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}
.back-to-top:hover {
  background: var(--color-gold);
  color: var(--color-dark);
}
.back-to-top__arrow {
  font-size: 16px;
  line-height: 1;
}

/* ---------- 19. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 10px 18px;
  background: var(--color-green);
  color: var(--color-dark);
  font-weight: 700;
  transform: translateY(-200%);
  transition: transform 0.2s ease;
}
.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 20. 页脚 ---------- */
.site-footer {
  position: relative;
  background-color: var(--color-dark);
  color: var(--color-paper);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold) 0 220px, var(--color-primary) 220px 100%);
}
.site-footer__inner {
  padding-block: clamp(44px, 7vw, 76px) 22px;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: clamp(28px, 5vw, 64px);
}
.site-footer__brand,
.site-footer__nav,
.site-footer__contact,
.site-footer__edition {
  min-width: 0;
}
.site-footer__logo {
  display: inline-block;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--color-gold);
  font-family: var(--font-headline);
  font-size: clamp(26px, 3vw, 34px);
  letter-spacing: 0.04em;
  color: var(--color-cream);
}
.site-footer__tagline {
  margin-top: 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.site-footer__heading {
  position: relative;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(201, 161, 55, 0.3);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
}
.site-footer__heading::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 32px;
  height: 1px;
  background: var(--color-primary);
}
.site-footer__list {
  display: grid;
  gap: 12px;
  font-size: 14px;
}
.site-footer__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-paper);
  transition: color 0.2s ease;
}
.site-footer__list a::before {
  content: "▶";
  font-size: 8px;
  color: var(--color-primary);
  transition: color 0.2s ease, transform 0.2s ease;
}
.site-footer__list a:hover {
  color: var(--color-gold);
}
.site-footer__list a:hover::before {
  transform: translateX(3px);
  color: var(--color-gold);
}
.site-footer__contact .site-footer__list {
  color: var(--color-line);
}
.site-footer__contact .site-footer__list li {
  padding-left: 12px;
  border-left: 2px solid rgba(201, 161, 55, 0.35);
}
.site-footer__stamp {
  position: relative;
  display: inline-block;
  padding: 10px 16px 10px 12px;
  border: 2px solid var(--color-gold);
  transform: rotate(-3deg);
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--color-gold);
}
.site-footer__stamp::after {
  content: "";
  position: absolute;
  top: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  background: var(--color-dark);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}
.site-footer__stamp-note {
  margin-top: 14px;
  max-width: 24ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-line);
}
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  margin-top: clamp(36px, 5vw, 56px);
  padding-top: 16px;
  padding-bottom: 20px;
  border-top: 1px solid rgba(201, 161, 55, 0.22);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--color-line);
}
.site-footer__copyright {
  color: var(--color-paper);
}
.site-footer__icp {
  color: var(--color-gold);
}

/* ---------- 21. 显现动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--reveal-delay, 0s);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 22. 工具类 ---------- */
.font-data {
  font-family: var(--font-data);
}
.text-center {
  text-align: center;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 23. 响应式 ---------- */
@media (max-width: 900px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}
@media (max-width: 560px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ---------- 24. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .scroll-progress {
    display: none;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .disclose[open] .disclose__body {
    animation: none;
  }
}