/* 威尼斯人主站 · 共享样式 /assets/site.css
   设计协议：城市光影控制台 / Bund Console */

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-night);
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.028) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

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

/* ---------- 变量 ---------- */
:root {
  --color-night: #0B1E36;
  --color-night-deep: #081120;
  --color-card: #1A2B4A;
  --color-gold: #D4AF37;
  --color-gold-light: #FFD700;
  --color-gold-deep: #B8860B;
  --color-purple: #8A2BE2;
  --color-orange: #FF8C00;
  --color-silver: #C0C0C0;
  --color-white: #FFFFFF;

  --grad-gold: linear-gradient(135deg, #B8860B, #FFD700);
  --grad-console: linear-gradient(90deg, #B8860B 0%, #FFD700 35%, #8A2BE2 100%);

  --font-display: "Playfair Display", "Noto Serif SC", "Songti SC", SimSun, Georgia, serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --radius: 0;
  --container-w: 1240px;
  --header-h: 84px;
  --border-gold: 1px solid rgba(212, 175, 55, 0.28);
  --border-gold-faint: 1px solid rgba(212, 175, 55, 0.14);
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.25;
  color: var(--color-white);
  letter-spacing: 0.04em;
}

h1 {
  font-size: clamp(36px, 5vw, 64px);
}

h2 {
  font-size: clamp(28px, 4vw, 48px);
}

h3 {
  font-size: 22px;
}

h4 {
  font-size: 18px;
  font-weight: 400;
}

p {
  color: var(--color-white);
}

#main-content {
  flex: 1 0 auto;
  width: 100%;
}

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

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.container--narrow {
  max-width: 860px;
}

/* ---------- 头部 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-4);
  z-index: 300;
  padding: var(--space-3) var(--space-5);
  background: var(--grad-gold);
  color: var(--color-night);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: top 0.2s var(--ease);
}

.skip-link:focus-visible {
  top: 0;
  outline: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 250;
  width: 0;
  height: 3px;
  background: var(--grad-console);
  pointer-events: none;
}

.site-header {
  position: relative;
  background-color: var(--color-night);
  border-bottom: var(--border-gold);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold-deep) 0%, var(--color-gold) 40%, rgba(138, 43, 226, 0.6) 100%);
}

.site-header__topline {
  background-color: var(--color-night-deep);
  border-bottom: var(--border-gold-faint);
}

.site-header__topline-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 40px;
  padding-block: var(--space-1);
}

.site-header__tagline {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--color-silver);
}

.site-header__tools {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-header__clock {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-gold);
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  background-color: var(--color-gold);
  animation: status-pulse 2.8s var(--ease) infinite;
}

@keyframes status-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.site-search {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-color: rgba(255, 255, 255, 0.04);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-silver);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.site-search:hover {
  border-color: var(--color-gold);
  background-color: rgba(212, 175, 55, 0.08);
  color: var(--color-white);
}

.site-search__icon {
  position: relative;
  display: block;
  width: 12px;
  height: 12px;
  border: 1.5px solid var(--color-gold);
  border-radius: 50%;
  flex-shrink: 0;
}

.site-search__icon::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -2px;
  width: 5px;
  height: 1.5px;
  background: var(--color-gold);
  transform: rotate(45deg);
  border-radius: 1px;
}

.site-header__main {
  background-color: var(--color-night);
}

.site-header__main-inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  min-height: var(--header-h);
}

.site-brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  margin-right: auto;
  padding-block: var(--space-2);
}

.site-brand__index {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.36em;
  color: var(--color-gold);
  opacity: 0.85;
  text-transform: uppercase;
  line-height: 1.2;
}

.site-brand__name {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: 0.18em;
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.site-brand::after {
  content: "";
  display: block;
  width: 64px;
  height: 2px;
  margin-top: 5px;
  background: linear-gradient(90deg, var(--color-gold) 0%, rgba(212, 175, 55, 0.12) 100%);
}

.site-nav {
  display: flex;
  align-items: center;
}

.site-nav__list {
  display: flex;
  align-items: stretch;
}

.site-nav__item {
  position: relative;
  display: flex;
}

.site-nav__item + .site-nav__item::before {
  content: "";
  align-self: center;
  width: 1px;
  height: 18px;
  background-color: rgba(212, 175, 55, 0.22);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: var(--space-3) 14px;
  font-size: 14px;
  color: var(--color-white);
  opacity: 0.82;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), opacity 0.2s var(--ease), color 0.2s var(--ease);
}

.site-nav__index {
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--color-gold);
  opacity: 0.75;
}

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

.site-nav__link:hover {
  background-color: rgba(138, 43, 226, 0.16);
  color: var(--color-white);
  opacity: 1;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold);
  opacity: 1;
}

.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  right: 14px;
  bottom: 0;
  left: 14px;
  height: 2px;
  background: var(--grad-gold);
}

.site-nav__toggle {
  display: none;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
  padding: var(--space-2);
}

.site-nav__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-gold);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.site-nav__toggle-line:nth-child(2) {
  width: 18px;
}

.site-nav__toggle-text {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-silver);
  margin-top: 4px;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background-color: var(--color-night-deep);
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-console);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--space-7);
  padding-block: var(--space-8);
}

.site-brand--footer {
  padding-block: 0;
}

.site-brand--footer::after {
  width: 48px;
}

.site-footer__tagline {
  margin-top: var(--space-3);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--color-gold);
}

.site-footer__trust {
  margin-top: var(--space-4);
  max-width: 38em;
  font-size: 13px;
  line-height: 1.85;
  color: var(--color-silver);
}

.site-footer__heading {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-gold-faint);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--color-gold);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-footer__link {
  display: inline-block;
  padding-block: 4px;
  font-size: 14px;
  color: var(--color-silver);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.site-footer__link::before {
  content: "/· ";
  color: var(--color-gold);
  opacity: 0.65;
}

.site-footer__link:hover {
  color: var(--color-white);
  transform: translateX(4px);
}

.site-footer__text {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-silver);
}

.site-footer__bar {
  border-top: var(--border-gold-faint);
  padding-block: var(--space-4);
}

.site-footer__bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 12px;
  color: var(--color-silver);
}

.site-footer__copyright {
  letter-spacing: 0.04em;
}

.site-footer__icp {
  letter-spacing: 0.08em;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius);
  background-color: transparent;
  color: var(--color-gold);
  font-size: 14px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.btn:hover {
  background-color: var(--color-gold);
  color: var(--color-night);
}

.btn--gold {
  background: var(--grad-gold);
  border-color: transparent;
  color: var(--color-night);
  font-weight: 600;
}

.btn--gold:hover {
  background: linear-gradient(135deg, #C99A2E, #F5CC45);
  box-shadow: 0 4px 18px rgba(212, 175, 55, 0.28);
  color: var(--color-night);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--color-white);
}

.btn--ghost:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-4);
  font-size: 13px;
  color: var(--color-silver);
}

.breadcrumb__link {
  color: var(--color-silver);
  transition: color 0.2s var(--ease);
}

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

.breadcrumb__sep {
  color: var(--color-gold);
  opacity: 0.5;
}

.breadcrumb__current {
  color: var(--color-white);
}

/* ---------- 面板 ---------- */
.panel {
  background-color: var(--color-card);
  border: var(--border-gold-faint);
  padding: var(--space-6);
}

.panel--status {
  border-left: 3px solid var(--color-gold);
}

.panel__title {
  margin-bottom: var(--space-3);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.panel__text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-silver);
}

/* ---------- 标题与索引 ---------- */
.index-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.section-heading__index {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--color-gold);
}

.section-heading__title {
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 300;
  letter-spacing: 0.06em;
}

.section-heading__note {
  margin-left: auto;
  font-size: 13px;
  color: var(--color-silver);
}

/* ---------- 页面头部横幅 ---------- */
.page-head {
  padding-block: var(--space-8) var(--space-6);
  border-bottom: var(--border-gold-faint);
}

.page-head__title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: 0.08em;
}

.page-head__desc {
  max-width: 46em;
  margin-top: var(--space-3);
  font-size: 16px;
  color: var(--color-silver);
}

/* ---------- 网格 ---------- */
.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.layout-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-5);
}

.layout-grid__span-4 {
  grid-column: span 4;
}

.layout-grid__span-6 {
  grid-column: span 6;
}

.layout-grid__span-8 {
  grid-column: span 8;
}

.layout-grid__span-12 {
  grid-column: span 12;
}

/* ---------- 分隔线 · 标签 · 媒体 ---------- */
.divider {
  height: 1px;
  border: none;
  margin-block: var(--space-6);
  background: linear-gradient(90deg, var(--color-gold) 0%, rgba(212, 175, 55, 0.14) 100%);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border: 1px solid rgba(138, 43, 226, 0.55);
  background-color: rgba(138, 43, 226, 0.12);
  color: var(--color-gold-light);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.5;
}

.tag--gold {
  border-color: rgba(212, 175, 55, 0.5);
  background-color: rgba(212, 175, 55, 0.1);
  color: var(--color-gold);
}

.media-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background-color: var(--color-card);
  border: var(--border-gold-faint);
}

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

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

.media-frame__placeholder {
  padding: var(--space-4);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-align: center;
  color: var(--color-silver);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--color-gold);
  transition: gap 0.2s var(--ease), color 0.2s var(--ease);
}

.link-arrow::after {
  content: "→";
  font-family: var(--font-display);
  color: var(--color-gold);
}

.link-arrow:hover {
  gap: 12px;
  color: var(--color-gold-light);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .site-header__main-inner {
    gap: var(--space-3);
  }

  .site-nav__link {
    padding: var(--space-3) 10px;
    font-size: 13px;
  }

  .site-nav__link[aria-current="page"]::before {
    right: 10px;
    left: 10px;
  }

  .site-header__tagline {
    letter-spacing: 0.16em;
  }
}

@media (max-width: 860px) {
  .site-header__main-inner {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    padding-block: var(--space-3);
  }

  .site-brand {
    order: 1;
    margin-right: 0;
  }

  .site-nav__toggle {
    display: inline-flex;
    order: 2;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    order: 3;
    flex-basis: 100%;
    align-items: stretch;
    border-top: var(--border-gold-faint);
    margin-top: var(--space-2);
    padding-top: var(--space-2);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__item {
    display: block;
  }

  .site-nav__item + .site-nav__item::before {
    display: none;
  }

  .site-nav__link {
    width: 100%;
    padding: 12px var(--space-4);
    border-bottom: var(--border-gold-faint);
    font-size: 14px;
  }

  .site-nav__link[aria-current="page"]::before {
    top: 0;
    right: auto;
    bottom: 0;
    left: 0;
    width: 3px;
    height: auto;
    background: var(--grad-gold);
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    padding-block: var(--space-7);
  }

  .data-grid {
    grid-template-columns: 1fr;
  }

  .layout-grid__span-4,
  .layout-grid__span-6,
  .layout-grid__span-8 {
    grid-column: span 12;
  }
}

@media (max-width: 600px) {
  .site-header__topline-inner {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    padding-block: var(--space-2);
  }

  .site-header__tools {
    justify-content: space-between;
    width: 100%;
  }

  .site-search {
    padding: 6px 10px;
  }

  .site-search__text {
    display: none;
  }

  .site-brand__name {
    font-size: 24px;
  }

  .site-brand__index {
    font-size: 9px;
    letter-spacing: 0.28em;
  }

  .site-brand::after {
    width: 48px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    padding-block: var(--space-6);
    gap: var(--space-6);
  }

  .site-footer__bar-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .page-head {
    padding-block: var(--space-6) var(--space-5);
  }
}

/* ---------- 无障碍动效 ---------- */
@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;
  }
}