/* ============================================
   PG电娱 Site Kit — 共享样式 v3.2
   文件：/assets/site.css
   设计概念：霓虹展廊（Neon Gallery）
============================================ */

/* ---------- 变量 ---------- */
:root {
  --color-bg: #0A1128;
  --color-bg-deep: #060A18;
  --color-accent: #7B2FBE;
  --color-gold: #F2C14E;
  --color-indigo: #3D2C8D;
  --color-teal: #0F5257;
  --color-text: #E6E8EF;
  --color-muted: #8892B0;
  --color-white: #FFFFFF;

  --font-heading: 'Orbitron', 'Arial Narrow', 'DIN Condensed', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Open Sans', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --header-h: 72px;
  --content-w: 1200px;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  --cut: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --glow-gold: 0 0 12px rgba(242, 193, 78, 0.45);
  --glow-purple: 0 0 16px rgba(123, 47, 190, 0.55);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 900px 480px at 12% -80px, rgba(123, 47, 190, 0.10), transparent 60%),
    repeating-linear-gradient(0deg, rgba(230, 232, 239, 0.02) 0 1px, transparent 1px 48px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

@media (max-width: 640px) {
  html {
    font-size: 15px;
  }
}

/* ---------- 中文排版与基础元素 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  letter-spacing: 0.04em;
}

h2 {
  font-size: clamp(1.375rem, 2.5vw, 2.125rem);
  letter-spacing: 0.06em;
}

h3 {
  font-size: 1.25rem;
  letter-spacing: 0.08em;
}

h4 {
  font-size: 1rem;
  letter-spacing: 0.1em;
}

p {
  margin-bottom: var(--space-sm);
}

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

button {
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--color-accent);
  color: var(--color-white);
}

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

/* ---------- 布局容器 ---------- */
.container {
  width: min(100% - 2rem, var(--content-w));
  margin-inline: auto;
}

.page-header {
  position: relative;
  padding: var(--space-xl) 0 var(--space-lg);
}

.page-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
  opacity: 0.35;
}

.page-header__title {
  margin-top: var(--space-sm);
  max-width: 18em;
}

.page-header__summary {
  margin-top: var(--space-xs);
  max-width: 60ch;
  color: var(--color-muted);
  font-size: 1.0625rem;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  margin-bottom: var(--space-md);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.breadcrumb li:not(:last-child)::after {
  content: '›';
  margin-left: 0.35rem;
  color: var(--color-gold);
  opacity: 0.7;
}

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

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

.breadcrumb [aria-current="page"] {
  color: var(--color-gold);
}

/* ---------- 展格网格 ---------- */
.exhibit-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-sm);
}

.exhibit-grid__item {
  grid-column: span 6;
}

.exhibit-grid__item--wide {
  grid-column: span 8;
}

.exhibit-grid__item--narrow {
  grid-column: span 4;
}

.exhibit-grid__item--full {
  grid-column: span 12;
}

/* ---------- 切角面板 ---------- */
.panel {
  position: relative;
  padding: var(--space-md);
  background: var(--color-indigo);
  color: var(--color-text);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.panel--gold {
  background: var(--color-gold);
  color: var(--color-bg);
}

.panel--plain {
  background: var(--color-white);
  color: var(--color-bg);
}

/* ---------- 展区标签 ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.section-label::before {
  content: '';
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  background: var(--color-gold);
  transform: rotate(45deg);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8125rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  text-transform: uppercase;
  color: var(--color-text);
  background: transparent;
  text-decoration: none;
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
  transition:
    background 0.3s var(--ease),
    color 0.3s var(--ease),
    box-shadow 0.3s var(--ease),
    transform 0.3s var(--ease);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-gold);
  color: var(--color-bg);
  box-shadow: var(--glow-gold);
}

.btn--outline {
  color: var(--color-gold);
  box-shadow: inset 0 0 0 1px var(--color-gold);
}

.btn--outline:hover {
  background: var(--color-gold);
  color: var(--color-bg);
  box-shadow: var(--glow-gold);
}

/* ---------- 图片容器 ---------- */
.img-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, rgba(123, 47, 190, 0.18), rgba(15, 82, 87, 0.28)),
    var(--color-indigo);
  clip-path: polygon(
    0 8px,
    8px 0,
    calc(100% - 8px) 0,
    100% 8px,
    100% calc(100% - 8px),
    calc(100% - 8px) 100%,
    8px 100%,
    0 calc(100% - 8px)
  );
  overflow: hidden;
}

.img-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.img-frame--wide {
  aspect-ratio: 16 / 9;
}

.img-frame--square {
  aspect-ratio: 1 / 1;
}

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

.img-frame img,
.img-frame svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame__caption {
  position: absolute;
  z-index: 2;
  left: 0;
  bottom: 0;
  padding: 0.35rem 0.75rem;
  background: rgba(10, 17, 40, 0.85);
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  backdrop-filter: blur(4px);
}

/* ---------- 装饰 ---------- */
.diagonal-stripes {
  background: repeating-linear-gradient(
    135deg,
    rgba(123, 47, 190, 0.18) 0 6px,
    transparent 6px 14px
  );
}

.deco-line {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--color-gold) 30%, var(--color-accent) 70%, transparent);
  opacity: 0.45;
}

/* ---------- 头部：霓虹展架 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 17, 40, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(242, 193, 78, 0.22);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--color-gold) 25%, var(--color-accent) 75%, transparent 100%);
  opacity: 0.9;
  pointer-events: none;
  z-index: 5;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: min(100% - 2rem, var(--content-w));
  min-height: var(--header-h);
  margin-inline: auto;
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-accent), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left top;
  pointer-events: none;
  z-index: 6;
}

/* ---------- 品牌 ---------- */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-right: auto;
  color: var(--color-text);
  transition: color 0.3s var(--ease);
}

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

.site-brand__mark {
  position: relative;
  width: 30px;
  height: 30px;
  border: 2px solid var(--color-gold);
  transform: rotate(45deg);
  transition: transform 0.6s var(--ease), border-color 0.3s var(--ease);
  flex-shrink: 0;
}

.site-brand__mark::before {
  content: '';
  position: absolute;
  inset: 6px;
  background: var(--color-accent);
  transition: background 0.4s var(--ease);
}

.site-brand:hover .site-brand__mark {
  transform: rotate(225deg);
  border-color: var(--color-text);
}

.site-brand:hover .site-brand__mark::before {
  background: var(--color-gold);
}

.site-brand__text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1;
  white-space: nowrap;
}

.site-brand--footer {
  margin-right: 0;
}

/* ---------- 主导航 ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  white-space: nowrap;
  transition: color 0.3s var(--ease), text-shadow 0.3s var(--ease);
}

.site-nav__link:hover {
  color: var(--color-gold);
  text-shadow: var(--glow-gold);
}

.site-nav__link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 4px;
  height: 4px;
  background: var(--color-gold);
  transform: translateX(-50%) rotate(45deg);
  opacity: 0;
  transition: opacity 0.3s var(--ease), top 0.3s var(--ease);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.35s var(--ease);
}

.site-nav__link:hover::before,
.site-nav__link[aria-current="page"]::before {
  opacity: 1;
  top: -6px;
}

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

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

/* ---------- 移动端导航按钮 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(242, 193, 78, 0.4);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--color-gold);
  box-shadow: var(--glow-gold);
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-gold);
  border-radius: 1px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: 0;
  left: -9999px;
  z-index: 200;
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-gold);
  color: var(--color-bg) !important;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
}

.skip-link:focus {
  left: 0;
  outline: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ---------- 页脚：展览终章铭牌 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--space-xl);
  padding: var(--space-xl) 0 var(--space-md);
  background: var(--color-bg-deep);
  border-top: 1px solid rgba(242, 193, 78, 0.18);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-accent) 60%, transparent 100%);
  opacity: 0.7;
  pointer-events: none;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.4fr;
  align-items: start;
  gap: var(--space-lg);
  width: min(100% - 2rem, var(--content-w));
  margin-inline: auto;
}

.site-footer__brand {
  max-width: 46ch;
}

.site-footer__statement {
  margin-top: var(--space-sm);
  margin-bottom: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.site-footer__heading {
  margin-bottom: var(--space-sm);
  padding-bottom: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  border-bottom: 1px solid rgba(242, 193, 78, 0.18);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text);
  transition: color 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.site-footer__link::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  transform: rotate(45deg);
  opacity: 0.45;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  flex-shrink: 0;
}

.site-footer__link:hover {
  color: var(--color-gold);
  padding-left: 0.25rem;
}

.site-footer__link:hover::before {
  opacity: 1;
  transform: rotate(45deg) scale(1.25);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-muted);
}

.site-footer__contact p {
  margin: 0;
}

.site-footer__meta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs) var(--space-sm);
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(242, 193, 78, 0.15);
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.site-footer__meta p {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .exhibit-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .exhibit-grid__item,
  .exhibit-grid__item--narrow {
    grid-column: span 3;
  }

  .exhibit-grid__item--wide,
  .exhibit-grid__item--full {
    grid-column: span 6;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    display: block;
    padding: 0.75rem 0;
    background: rgba(6, 10, 24, 0.98);
    border-bottom: 1px solid rgba(242, 193, 78, 0.35);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s var(--ease);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav__link {
    display: block;
    width: min(100% - 2rem, var(--content-w));
    margin-inline: auto;
    padding: 0.875rem 1.25rem;
    font-size: 0.9375rem;
    letter-spacing: 0.16em;
    border-left: 3px solid transparent;
    border-bottom: 1px solid rgba(230, 232, 239, 0.06);
  }

  .site-nav__link:last-child {
    border-bottom: none;
  }

  .site-nav__link::before,
  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    background: linear-gradient(90deg, rgba(242, 193, 78, 0.12), transparent);
    border-left-color: var(--color-gold);
  }
}

@media (max-width: 760px) {
  .site-footer {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .site-footer__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
}

@media (max-width: 640px) {
  .exhibit-grid {
    grid-template-columns: 1fr;
  }

  .exhibit-grid__item,
  .exhibit-grid__item--wide,
  .exhibit-grid__item--narrow,
  .exhibit-grid__item--full {
    grid-column: 1 / -1;
  }

  .page-header {
    padding: var(--space-lg) 0 var(--space-md);
  }

  .panel {
    padding: var(--space-sm);
  }

  .section-label {
    letter-spacing: 0.14em;
  }
}

/* ---------- 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  html {
    scroll-behavior: auto;
  }
}