/* ==========================================================================
   LEYU 中国官网 · 共享站点样式 / /assets/site.css
   设计语言：夜间赛场档案 · 展览画册 × 数字竞技场
   ========================================================================== */

/* ==========================================================================
   1. 设计变量
   ========================================================================== */
:root {
  --color-blue: #0A1F44;
  --color-blue-soft: #12305F;
  --color-blue-dark: #071633;
  --color-bg: #F4F7FB;
  --color-orange: #FF6B35;
  --color-orange-dark: #E8511F;
  --color-gold: #FFD700;
  --color-text: #0D1B2E;
  --color-muted: #4A5B73;
  --color-line: #C9D4E3;
  --color-success: #1FA971;

  --font-display: Impact, 'Anton', 'Arial Black', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Source Han Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, 'JetBrains Mono', 'Roboto Mono', 'Cascadia Code', 'Courier New', monospace;

  --content-max: 1200px;
  --content-pad: 1.5rem;
  --shadow-hard: 5px 5px 0 var(--color-blue);
  --header-border: 4px solid var(--color-orange);
}

/* ==========================================================================
   2. Reset 与基础
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: none;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

main[id="main-content"] {
  flex: 1;
  width: 100%;
}

main[id="main-content"]:focus {
  outline: none;
}

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

a {
  color: var(--color-orange-dark);
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

a:hover {
  color: var(--color-orange);
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--color-gold);
  color: var(--color-blue);
}

/* ==========================================================================
   3. 可访问性与工具
   ========================================================================== */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

:focus-visible {
  outline: 3px solid var(--color-orange);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: -10rem;
  left: 1rem;
  z-index: 3000;
  background: var(--color-gold);
  color: var(--color-blue);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border: 3px solid var(--color-blue);
  box-shadow: 4px 4px 0 var(--color-orange);
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0;
  background: linear-gradient(90deg, var(--color-orange), var(--color-gold));
  z-index: 4000;
}

/* ==========================================================================
   4. 内容容器与栅格
   ========================================================================== */
.container {
  width: min(var(--content-max), 100% - (var(--content-pad) * 2));
  margin-inline: auto;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid[data-cols="2"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid[data-cols="3"] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* ==========================================================================
   5. 头部 · 居中刊头 / 记分牌
   ========================================================================== */
.site-header {
  position: relative;
  background-color: var(--color-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 22px 22px;
  border-top: 4px solid var(--color-gold);
  border-bottom: 4px solid var(--color-orange);
}

.site-header__inner {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.75rem 4.5rem 1.25rem;
}

.site-header__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  text-decoration: none;
  color: #fff;
  transition: opacity 0.15s ease;
}

.site-header__brand:hover {
  opacity: 0.88;
}

.site-header__brand-en {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.04em;
  color: #fff;
  transition: color 0.15s ease;
}

.site-header__brand:hover .site-header__brand-en {
  color: var(--color-gold);
}

.site-header__brand-cn {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: #fff;
}

.site-header__badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: inline-block;
  background: var(--color-orange);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
  padding: 0.55rem 0.7rem;
  border: 2px solid var(--color-gold);
  box-shadow: 3px 3px 0 var(--color-blue-dark);
  white-space: nowrap;
}

/* ==========================================================================
   6. 导航
   ========================================================================== */
.site-nav {
  position: relative;
  background: rgba(18, 48, 95, 0.55);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.site-nav__toggle {
  display: none;
  width: 100%;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: var(--color-orange);
  border: none;
  border-bottom: 3px solid var(--color-blue);
  padding: 0.875rem 1rem;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  transition: background 0.15s ease;
}

.site-nav__toggle:hover {
  background: var(--color-orange-dark);
}

.site-nav__toggle-icon {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
  flex-shrink: 0;
}

.site-nav__toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav__toggle-label {
  display: inline-flex;
  align-items: center;
}

.site-nav__toggle-label--close {
  display: none;
}

.site-nav[data-open] .site-nav__toggle-label--open {
  display: none;
}

.site-nav[data-open] .site-nav__toggle-label--close {
  display: inline;
}

.site-nav[data-open] .site-nav__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-nav[data-open] .site-nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-nav[data-open] .site-nav__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav__list {
  display: flex;
  justify-content: center;
  align-items: stretch;
  max-width: var(--content-max);
  margin-inline: auto;
}

.site-nav__item {
  flex: 0 0 auto;
}

.site-nav__item + .site-nav__item {
  border-left: 1px solid rgba(255, 255, 255, 0.28);
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 0.875rem 1.5rem;
  color: rgba(255, 255, 255, 0.88);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.site-nav__link:hover {
  color: var(--color-gold);
  background: rgba(255, 255, 255, 0.05);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
  font-weight: 700;
}

/* ==========================================================================
   7. 页脚 · 档案末页
   ========================================================================== */
.site-footer {
  background-color: var(--color-blue-dark);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 26px 26px;
  border-top: 4px solid var(--color-gold);
  color: rgba(255, 255, 255, 0.8);
}

.site-footer__inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 3rem var(--content-pad) 2rem;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.site-footer__identity {
  padding-right: 1rem;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  letter-spacing: 0.05em;
}

.site-footer__brand::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  background: var(--color-orange);
  border: 2px solid var(--color-gold);
}

.site-footer__brand span {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 900;
}

.site-footer__desc {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
}

.site-footer__trust {
  margin-top: 0.75rem;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  border: 1px solid rgba(255, 215, 0, 0.4);
  padding: 0.35rem 0.6rem;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding-bottom: 0.5rem;
  margin-bottom: 0.875rem;
}

.site-footer__links li + li {
  margin-top: 0.4rem;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.15s ease;
}

.site-footer__links a:hover {
  color: var(--color-orange);
}

.site-footer__contact {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.875rem;
  border-top: 2px dashed rgba(255, 255, 255, 0.22);
  border-bottom: 2px dashed rgba(255, 255, 255, 0.22);
  padding: 1.5rem 0;
  margin-bottom: 1.5rem;
}

.site-footer__contact-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 3px solid var(--color-orange);
  padding: 0.75rem 0.875rem;
  min-width: 0;
}

.site-footer__contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.25rem;
}

.site-footer__contact-value {
  display: block;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.85);
  word-break: break-all;
  overflow-wrap: anywhere;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__icp,
.site-footer__copyright {
  margin: 0;
}

/* ==========================================================================
   8. 展览组件
   ========================================================================== */
.section-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(3rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1;
  color: var(--color-blue);
  border-bottom: 4px solid var(--color-orange);
  padding-bottom: 0.25rem;
}

.exhibit-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-blue);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1;
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--color-blue);
  box-shadow: 3px 3px 0 var(--color-orange);
}

.exhibit-tag--gold {
  background: transparent;
  color: var(--color-gold);
  border-color: var(--color-gold);
  box-shadow: 3px 3px 0 rgba(255, 107, 53, 0.65);
}

.data-plate {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-orange);
  padding: 1rem 1.25rem;
  box-shadow: 4px 4px 0 rgba(10, 31, 68, 0.1);
  font-size: 0.875rem;
}

.data-plate__title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-orange-dark);
  margin-bottom: 0.375rem;
}

.data-plate > *:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   9. 按钮
   ========================================================================== */
.ticket-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--color-orange);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  padding: 0.875rem 1.75rem;
  border: 2px solid var(--color-orange-dark);
  box-shadow: var(--shadow-hard);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.ticket-btn:hover {
  background: var(--color-orange-dark);
  color: #fff;
  transform: translate(2px, 2px);
  box-shadow: 3px 3px 0 var(--color-blue);
}

.ticket-btn:active {
  transform: translate(4px, 4px);
  box-shadow: 1px 1px 0 var(--color-blue);
}

.ticket-btn--ghost {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
  box-shadow: 5px 5px 0 rgba(255, 255, 255, 0.18);
}

.ticket-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-gold);
  color: var(--color-gold);
  box-shadow: 3px 3px 0 rgba(255, 255, 255, 0.12);
}

/* ==========================================================================
   10. 图片容器
   ========================================================================== */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-blue-soft);
  border: 3px solid var(--color-blue);
  box-shadow: 6px 6px 0 rgba(10, 31, 68, 0.18);
}

.image-frame::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.image-frame[data-ratio="16/9"]::before {
  padding-top: 56.25%;
}

.image-frame[data-ratio="4/3"]::before {
  padding-top: 75%;
}

.image-frame[data-ratio="1/1"]::before {
  padding-top: 100%;
}

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

.image-frame--bordered {
  border-color: var(--color-orange);
  box-shadow: 8px 8px 0 var(--color-blue);
}

/* ==========================================================================
   11. 面包屑
   ========================================================================== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 1rem 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-line);
}

.breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-orange);
}

.breadcrumb__sep {
  color: var(--color-line);
  user-select: none;
}

.breadcrumb__current {
  color: var(--color-blue);
  font-weight: 700;
}

/* ==========================================================================
   12. 响应式
   ========================================================================== */
@media (min-width: 768px) {
  .site-header__inner {
    padding: 2.25rem 6rem 1.75rem;
  }

  .site-header__brand-en {
    font-size: 3.25rem;
  }

  .site-header__brand-cn {
    font-size: 1.375rem;
  }

  .site-header__badge {
    top: 1.5rem;
    right: 1.5rem;
    font-size: 0.75rem;
  }
}

@media (min-width: 1024px) {
  .site-header__brand-en {
    font-size: 3.75rem;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    padding: 1.25rem 4rem 1rem;
  }

  .site-header__brand-en {
    font-size: 2rem;
  }

  .site-header__brand-cn {
    font-size: 1.0625rem;
  }

  .site-header__badge {
    top: 0.75rem;
    right: 0.75rem;
    font-size: 0.625rem;
    padding: 0.4rem 0.55rem;
  }

  .site-nav__toggle {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    background: var(--color-blue);
    transition: max-height 0.3s ease;
  }

  .site-nav[data-open] .site-nav__list {
    max-height: 480px;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }

  .site-nav__item + .site-nav__item {
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-nav__link {
    padding: 0.875rem 1.25rem;
    border-bottom: none;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer__identity {
    padding-right: 0;
  }

  .site-footer__contact {
    grid-template-columns: 1fr;
    gap: 0.625rem;
  }

  .site-footer__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.375rem;
  }

  .grid[data-cols="2"],
  .grid[data-cols="3"] {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__identity {
    grid-column: 1 / -1;
  }

  .site-footer__contact {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   13. 减少动态偏好
   ========================================================================== */
@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;
  }

  .reading-progress {
    transition: none;
  }

  .site-nav__list {
    transition: none;
  }
}