/* ============================================================
   威尼斯人娱乐 · 共享站点样式 /assets/site.css
   框架：运河深青导航边框 + 象牙白阅读面 + 暗金水波索引
   ============================================================ */

:root {
  --canal: #0B3B3C;
  --canal-deep: #06282A;
  --ivory: #F6F1E7;
  --water: #DDE9E4;
  --gold: #B08A3E;
  --gold-light: #D9B86C;
  --coral: #D9695B;
  --mist: #5E8C8A;
  --graphite: #1C2321;
  --linen: #C9C2B4;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;

  --frame-max: 1280px;
  --content-max: 1180px;
  --prose-max: 68ch;
  --radius-s: 10px;
  --radius-m: 16px;
  --radius-l: 24px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ivory);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: clamp(16px, .55vw + 14px, 18px);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }

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

a { color: var(--canal); }

button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--gold-light);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 300;
  transform: translate(-50%, -160%);
  padding: 11px 22px;
  background: var(--ivory);
  color: var(--canal-deep);
  border-radius: 0 0 14px 14px;
  font-size: 14px;
  letter-spacing: .08em;
  text-decoration: none;
  box-shadow: 0 12px 26px -18px rgba(6, 40, 42, .9);
  transition: transform .18s var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

/* ============================================================
   站点头部：框架式导航
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--ivory);
  background:
    linear-gradient(180deg, var(--canal-deep) 0%, var(--canal) 62%, #0d4142 100%);
  border-bottom: 1px solid rgba(217, 184, 108, .28);
  box-shadow: 0 18px 38px -30px #000;
}

.site-header::after {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg,
      transparent 0%,
      rgba(176, 138, 62, .55) 16%,
      var(--gold-light) 50%,
      rgba(176, 138, 62, .55) 84%,
      transparent 100%);
  opacity: .7;
}

.site-header__frame {
  width: 100%;
  max-width: var(--frame-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 3.4vw, 44px);
}

.site-header__top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(12px, 2vw, 26px);
  padding-block: 11px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--canal-deep);
  background: linear-gradient(148deg, var(--gold-light) 0%, var(--gold) 100%);
  border-radius: 52% 48% 44% 56% / 50% 52% 48% 50%;
  box-shadow: inset 0 0 0 1px rgba(246, 241, 231, .5);
  transition: transform .22s var(--ease);
}

.brand:hover .brand__mark {
  transform: translateY(-2px) rotate(-3deg);
}

.brand__type {
  display: block;
  min-width: 0;
}

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .08em;
}

.brand__line {
  display: block;
  margin-top: 2px;
  font-size: 10.5px;
  line-height: 1.4;
  letter-spacing: .26em;
  color: var(--gold-light);
  opacity: .82;
}

/* 检索 */
.site-search {
  position: relative;
  flex: 1 1 260px;
  max-width: 420px;
  margin-left: auto;
}

.site-search__icon {
  position: absolute;
  left: 15px;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -8px;
  border: 1.6px solid var(--gold-light);
  border-radius: 50%;
  pointer-events: none;
}

.site-search__icon::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 6px;
  height: 1.6px;
  background: var(--gold-light);
  transform: rotate(45deg);
  border-radius: 2px;
}

.site-search__input {
  width: 100%;
  padding: 10px 16px 10px 38px;
  border-radius: 999px;
  border: 1px solid rgba(217, 184, 108, .32);
  background: rgba(6, 40, 42, .6);
  color: var(--ivory);
  font-family: inherit;
  font-size: 14px;
  letter-spacing: .02em;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
}

.site-search__input::placeholder {
  color: rgba(246, 241, 231, .52);
}

.site-search__input:focus {
  outline: none;
  border-color: var(--coral);
  background: rgba(6, 40, 42, .92);
  box-shadow: 0 0 0 3px rgba(217, 105, 91, .22);
}

.site-search__input::-webkit-search-cancel-button {
  filter: invert(1) opacity(.5);
}

.site-search__results {
  position: absolute;
  top: calc(100% + 9px);
  left: 0;
  right: 0;
  z-index: 120;
  max-height: min(58vh, 340px);
  overflow: auto;
  margin: 0;
  padding: 7px;
  list-style: none;
  background: var(--ivory);
  color: var(--graphite);
  border: 1px solid var(--linen);
  border-radius: var(--radius-m);
  box-shadow: 0 26px 48px -26px rgba(6, 40, 42, .65);
}

.site-search__results[hidden] {
  display: none;
}

.site-search__result a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-s);
  color: var(--graphite);
  font-size: 14px;
  text-decoration: none;
  transition: background .15s var(--ease);
}

.site-search__result a:hover,
.site-search__result a:focus-visible {
  background: var(--water);
}

.site-search__result-label {
  font-weight: 500;
}

.site-search__result-cat {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--mist);
}

.site-search__empty {
  padding: 11px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(217, 184, 108, .42);
  background: rgba(217, 184, 108, .12);
  color: var(--gold-light);
  font-size: 12.5px;
  letter-spacing: .18em;
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.nav-toggle:hover {
  background: rgba(217, 184, 108, .22);
  border-color: var(--gold-light);
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.6px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(4.6px) 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(-4.6px) rotate(-45deg);
}

/* 主导航 */
.site-nav {
  border-top: 1px solid rgba(217, 184, 108, .18);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(4px, 1.4vw, 18px);
  margin: 0;
  padding: 7px 0 11px;
  list-style: none;
}

.site-nav__item {
  margin: 0;
}

.site-nav__item:nth-child(3n+2) {
  margin-top: 3px;
}

.site-nav__item:nth-child(3n) {
  margin-top: 1px;
}

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 11px;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  color: rgba(246, 241, 231, .82);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .07em;
  text-decoration: none;
  transition: color .15s var(--ease), background .15s var(--ease), border-color .15s var(--ease), transform .15s var(--ease);
}

.site-nav__num {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.site-nav__link:hover {
  color: var(--ivory);
  background: rgba(217, 184, 108, .1);
  border-color: rgba(217, 184, 108, .32);
  transform: translateY(-2px);
}

.site-nav__link[aria-current="page"] {
  color: var(--canal-deep);
  background: linear-gradient(180deg, var(--gold-light) 0%, var(--gold) 100%);
  border-color: var(--gold-light);
  box-shadow: 0 10px 22px -16px rgba(217, 184, 108, .95);
}

.site-nav__link[aria-current="page"] .site-nav__num {
  color: rgba(6, 40, 42, .68);
}

/* ============================================================
   站点页脚
   ============================================================ */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--canal) 0%, var(--canal-deep) 100%);
  color: rgba(246, 241, 231, .78);
  padding-bottom: 24px;
}

.site-footer__wave {
  height: 14px;
  background-image: radial-gradient(circle at 50% 100%,
      transparent 6.5px,
      rgba(217, 184, 108, .45) 6.5px,
      rgba(217, 184, 108, .45) 7.6px,
      transparent 7.6px);
  background-size: 28px 14px;
  background-repeat: repeat-x;
  background-position: center top;
  opacity: .85;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr .9fr 1.25fr 1fr;
  gap: clamp(22px, 3vw, 46px);
  width: 100%;
  max-width: var(--frame-max);
  margin-inline: auto;
  padding: clamp(28px, 4vw, 46px) clamp(16px, 3.4vw, 44px) 0;
}

.site-footer__name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: .1em;
  line-height: 1.3;
  color: var(--ivory);
}

.site-footer__line {
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold-light);
}

.site-footer__note {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: rgba(246, 241, 231, .6);
  max-width: 32ch;
}

.site-footer__heading {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .3em;
  color: var(--gold-light);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  font-size: 14px;
}

.site-footer__links a {
  display: inline-block;
  color: rgba(246, 241, 231, .82);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}

.site-footer__links a:hover {
  color: var(--gold-light);
  border-bottom-color: rgba(217, 184, 108, .6);
}

.site-footer__links li {
  font-size: 14px;
  color: rgba(246, 241, 231, .82);
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  width: 100%;
  max-width: var(--frame-max);
  margin: clamp(24px, 3vw, 36px) auto 0;
  padding: 16px clamp(16px, 3.4vw, 44px) 0;
  border-top: 1px solid rgba(217, 184, 108, .2);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: rgba(246, 241, 231, .55);
}

/* ============================================================
   通用版式与组件
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 44px);
}

.section {
  padding-block: clamp(40px, 6vw, 84px);
}

.section--water {
  background: var(--water);
}

.section--deep {
  background: linear-gradient(180deg, var(--canal) 0%, var(--canal-deep) 100%);
  color: var(--ivory);
}

.section--deep h2,
.section--deep h3 {
  color: var(--ivory);
}

.prose {
  max-width: var(--prose-max);
  line-height: 1.78;
}

.prose > * + * {
  margin-top: 1em;
}

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--canal);
}

.prose h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
.prose h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); }

.prose ul,
.prose ol {
  padding-left: 1.3em;
}

.prose li + li {
  margin-top: .4em;
}

.prose a {
  color: var(--canal);
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.lede {
  max-width: 60ch;
  font-size: clamp(1.04rem, 1.5vw, 1.22rem);
  line-height: 1.72;
  color: #2c3733;
}

.section--deep .lede {
  color: rgba(246, 241, 231, .82);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.section--deep .eyebrow {
  color: var(--gold-light);
}

.index-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.wave-rule {
  height: 12px;
  background-image: radial-gradient(circle at 50% 100%,
      transparent 6.5px,
      rgba(176, 138, 62, .55) 6.5px,
      rgba(176, 138, 62, .55) 7.5px,
      transparent 7.5px);
  background-size: 26px 12px;
  background-repeat: repeat-x;
  opacity: .8;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .05em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s var(--ease), background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease);
}

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

.btn--coral {
  background: var(--coral);
  color: #2b100d;
  box-shadow: 0 14px 28px -20px rgba(217, 105, 91, .95);
}

.btn--coral:hover {
  background: #e2776a;
}

.btn--gold {
  background: linear-gradient(180deg, var(--gold-light) 0%, var(--gold) 100%);
  color: var(--canal-deep);
  box-shadow: 0 14px 28px -20px rgba(217, 184, 108, .95);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(246, 241, 231, .45);
  color: var(--ivory);
}

.btn--ghost:hover {
  border-color: var(--gold-light);
  color: var(--gold-light);
}

.btn--outline {
  background: transparent;
  border-color: rgba(11, 59, 60, .3);
  color: var(--canal);
}

.btn--outline:hover {
  border-color: var(--gold);
  color: var(--canal);
  background: rgba(221, 233, 228, .7);
}

/* 面包屑 */
.breadcrumb {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

.breadcrumb__link {
  color: var(--canal);
  text-decoration: none;
  border-bottom: 1px solid rgba(176, 138, 62, .4);
  transition: color .15s var(--ease), border-color .15s var(--ease);
}

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

/* 图像容器 */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-m);
  background: linear-gradient(140deg, var(--water) 0%, #cfe0da 100%);
  box-shadow: 0 26px 50px -34px rgba(6, 40, 42, .8);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(217, 184, 108, .38);
  pointer-events: none;
}

.media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--landscape { aspect-ratio: 16 / 9; }
.media--wide { aspect-ratio: 21 / 9; }
.media--portrait { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  margin: 10px 2px 0;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--mist);
}

/* 栅格 */
.grid {
  display: grid;
  gap: clamp(22px, 3vw, 44px);
}

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

.grid--split {
  grid-template-columns: minmax(0, 1.85fr) minmax(0, 1fr);
}

.grid--split-rev {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.85fr);
}

/* 折叠组 */
.accordion {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.accordion__item {
  border: 1px solid rgba(11, 59, 60, .16);
  border-radius: var(--radius-m);
  background: #fffdf7;
  overflow: hidden;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.accordion__item[data-open] {
  border-color: rgba(176, 138, 62, .55);
  box-shadow: 0 18px 36px -28px rgba(6, 40, 42, .7);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  color: var(--canal);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
}

.accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}

.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--gold);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.accordion__icon::before {
  width: 14px;
  height: 2px;
}

.accordion__icon::after {
  width: 2px;
  height: 14px;
}

.accordion__item[data-open] .accordion__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .22s var(--ease);
}

.accordion__panel-inner {
  overflow: hidden;
  padding: 0 18px;
  font-size: 15.5px;
  line-height: 1.78;
  color: #33403a;
}

.accordion__item[data-open] .accordion__panel-inner {
  padding-bottom: 18px;
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(11, 59, 60, .2);
  background: rgba(221, 233, 228, .65);
  color: var(--canal);
  font-size: 12px;
  letter-spacing: .08em;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .site-footer__inner {
    grid-template-columns: 1.4fr 1fr 1.2fr;
  }
  .site-footer__col:last-child {
    grid-column: 1 / -1;
  }
  .site-footer__col:last-child .site-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
  }
}

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

  .site-search {
    order: 3;
    flex: 1 1 100%;
    max-width: none;
    margin-left: 0;
  }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height .3s var(--ease), opacity .22s var(--ease);
  }

  .site-nav[data-open] {
    max-height: 76vh;
    overflow-y: auto;
    opacity: 1;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 16px;
  }

  .site-nav__item,
  .site-nav__item:nth-child(3n),
  .site-nav__item:nth-child(3n+2) {
    margin-top: 0;
  }

  .site-nav__link {
    padding: 13px 14px;
    font-size: 15px;
    border-radius: var(--radius-s);
    border-bottom: 1px solid rgba(217, 184, 108, .14);
  }

  .site-nav__link:hover {
    transform: none;
  }

  .brand__name { font-size: 16px; }
  .brand__line { letter-spacing: .18em; }
  .brand__mark { width: 36px; height: 36px; font-size: 17px; }
}

@media (max-width: 860px) {
  .grid--two,
  .grid--split,
  .grid--split-rev {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 680px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }
  .site-footer__col:last-child {
    grid-column: auto;
  }
  .site-footer__note {
    max-width: none;
  }
  .site-footer__base {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-header::after { height: 2px; }
}

/* ============================================================
   动效偏好降级
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .site-nav,
  .accordion__panel {
    transition: none !important;
  }
}