/* =========================================================
   /assets/site.css — 申博娱乐馆 共享样式
   层 0 奶油底 / 层 1 靛蓝面板 / 层 2 纸白卡片 / 层 3 暖金强调
   ========================================================= */

/* 1. Reset ------------------------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, dt { margin: 0; }

ul, ol { padding: 0; list-style: none; }

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

button, input, select, textarea { font: inherit; color: inherit; }

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

[hidden] { display: none !important; }

/* 2. 变量 ------------------------------------------------- */
:root {
  --indigo: #1B2A4A;
  --indigo-deep: #0F1B33;
  --indigo-mid: #2E4270;
  --gold: #C89B3C;
  --gold-light: #E7C87A;
  --cream: #F6F1E6;
  --paper: #FFFCF5;
  --ink: #241F1B;
  --ink-soft: #6B6355;
  --jade: #1F7A5C;
  --cinnabar: #C0452F;

  --hair: rgba(27, 42, 74, 0.16);
  --hair-light: rgba(231, 200, 122, 0.22);

  --radius-card: 18px;
  --radius-panel: 28px;
  --radius-pill: 999px;

  --frame-w: min(1240px, 100% - 48px);
  --font-heading: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;

  --shadow-panel: 0 24px 60px rgba(15, 27, 51, 0.16);
  --shadow-card: 0 12px 28px rgba(15, 27, 51, 0.08);
}

/* 3. 基础排版 --------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--cream);
  background-image:
    radial-gradient(circle at 8% 4%, rgba(200, 155, 60, 0.13), transparent 40%),
    radial-gradient(circle at 92% 2%, rgba(27, 42, 74, 0.10), transparent 36%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
}

h1, .h1 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(38px, 7.2vw, 88px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--ink);
}

h2, .h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.22;
  letter-spacing: 0.015em;
}

h3, .h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.38;
}

p { text-wrap: pretty; }

::selection { background: var(--gold-light); color: var(--indigo-deep); }

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

/* 4. 通用工具 --------------------------------------------- */
.frame {
  width: var(--frame-w);
  margin-inline: auto;
}

.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;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.78em;
  letter-spacing: 0.14em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 1px;
  background: currentColor;
}

.dot {
  display: inline-block;
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jade);
}

.dot--live { animation: dot-pulse 2.4s ease-out 2; }

@keyframes dot-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(31, 122, 92, 0.55); }
  70%  { box-shadow: 0 0 0 9px rgba(31, 122, 92, 0); }
  100% { box-shadow: 0 0 0 0 rgba(31, 122, 92, 0); }
}

/* 5. 按钮 ------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--indigo-deep);
}
.btn--gold:hover { background: var(--gold-light); border-color: var(--gold-light); transform: translateY(-1px); }

.btn--line {
  background: transparent;
  border-color: var(--hair-light);
  color: var(--gold-light);
}
.btn--line:hover { border-color: var(--gold); color: var(--paper); background: rgba(200, 155, 60, 0.14); }

.btn--jade {
  background: rgba(31, 122, 92, 0.12);
  border-color: rgba(31, 122, 92, 0.45);
  color: var(--jade);
}
.btn--jade:hover { background: rgba(31, 122, 92, 0.2); }

.btn--ghost {
  background: transparent;
  border-color: var(--hair);
  color: var(--ink-soft);
}
.btn--ghost:hover { border-color: var(--gold); color: var(--ink); }

.btn--sm { padding: 8px 15px; font-size: 13px; letter-spacing: 0.06em; }
.btn--block { width: 100%; }

/* 6. 跳转链接与阅读进度 ----------------------------------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -120px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--gold);
  color: var(--indigo-deep);
  font-weight: 600;
  border-radius: 0 0 12px 12px;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0; }

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 200;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--jade) 0%, var(--gold) 60%, var(--gold-light) 100%);
}

/* 7. 页头 ------------------------------------------------- */
.site-header {
  position: relative;
  z-index: 60;
  background: var(--indigo);
  color: var(--cream);
  border-bottom: 3px solid var(--gold);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 7%;
  right: 7%;
  top: 100%;
  height: 9px;
  background: var(--indigo-deep);
  border-radius: 0 0 14px 14px;
  opacity: 0.92;
  pointer-events: none;
}

.site-header__strip {
  background: var(--indigo-deep);
  border-bottom: 1px solid var(--hair-light);
}

.site-header__stripInner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 54px;
  padding-block: 8px;
}

.site-header__meta {
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: rgba(246, 241, 230, 0.62);
}

.site-header__meta .mono {
  color: var(--gold-light);
  letter-spacing: 0.24em;
}

.utility {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-header__band { background: var(--indigo); }

.site-header__bandInner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 18px 48px;
  padding-block: 22px 20px;
}

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  gap: 7px;
  justify-self: start;
}

.brand__name {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.1;
  letter-spacing: 0.07em;
  color: var(--paper);
}

.brand__name::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 13px;
  background: var(--gold);
  border-radius: 3px;
  transform: rotate(45deg);
}

.brand__motto {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.42em;
  color: var(--gold-light);
}

/* 导航 */
.nav { justify-self: end; }

.nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.nav__item { display: block; }

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: rgba(246, 241, 230, 0.82);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(231, 200, 122, 0.72);
}

.nav__label { white-space: nowrap; }

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--paper);
  background: rgba(231, 200, 122, 0.12);
}

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

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
}

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

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  background: rgba(231, 200, 122, 0.1);
  border: 1px solid rgba(231, 200, 122, 0.4);
  border-radius: var(--radius-pill);
  color: var(--gold-light);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover { background: rgba(231, 200, 122, 0.2); border-color: var(--gold); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s ease, opacity 0.24s ease;
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.site-header[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 8. 页脚 ------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(72px, 9vw, 120px);
  background: var(--indigo-deep);
  color: rgba(246, 241, 230, 0.78);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--gold) 0 34%,
    var(--jade) 34% 46%,
    var(--cinnabar) 46% 56%,
    rgba(231, 200, 122, 0.22) 56% 100%
  );
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.3fr;
  gap: 44px 40px;
  padding-block: 68px 44px;
}

.footer-brand__name {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.07em;
  color: var(--paper);
}

.footer-brand__motto {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--gold-light);
}

.footer-brand__note {
  margin-top: 18px;
  max-width: 34ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(246, 241, 230, 0.6);
}

.footer-col__title {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold-light);
}

.footer-col__list { display: grid; gap: 12px; }

.footer-col__list a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 15px;
  color: rgba(246, 241, 230, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-col__list a:hover,
.footer-col__list a:focus-visible {
  color: var(--gold-light);
  border-bottom-color: rgba(231, 200, 122, 0.55);
}

.footer-col__list--meta { gap: 16px; }

.footer-meta { display: grid; gap: 3px; }

.footer-meta__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(231, 200, 122, 0.7);
}

.footer-meta__value {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(246, 241, 230, 0.85);
  word-break: break-word;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding-block: 22px 32px;
  border-top: 1px solid var(--hair-light);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(246, 241, 230, 0.55);
}

.site-footer__legal { color: rgba(246, 241, 230, 0.62); }
.site-footer__note { color: rgba(231, 200, 122, 0.68); }

/* 9. 章节、面板、卡片 ------------------------------------- */
.section { padding-block: clamp(48px, 7vw, 96px); }

.panel {
  position: relative;
  padding: clamp(28px, 4vw, 56px);
  border-radius: var(--radius-panel);
  background: var(--indigo);
  color: var(--cream);
  box-shadow: var(--shadow-panel);
}

.panel h2, .panel h3 { color: var(--paper); }
.panel p { color: rgba(246, 241, 230, 0.82); }
.panel .eyebrow { color: var(--gold-light); }

.panel--paper {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--hair);
  box-shadow: var(--shadow-card);
}
.panel--paper h2, .panel--paper h3 { color: var(--ink); }
.panel--paper p { color: var(--ink-soft); }

.card {
  padding: clamp(20px, 2.4vw, 32px);
  background: var(--paper);
  border: 1px solid var(--hair);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); }

/* 10. 正文与面包屑 ---------------------------------------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}
.prose p + p { margin-top: 1.1em; }
.prose h2 { margin-top: 1.6em; margin-bottom: 0.6em; }
.prose h3 { margin-top: 1.4em; margin-bottom: 0.5em; }

.breadcrumbs {
  margin-bottom: 28px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(27, 42, 74, 0.3);
}
.breadcrumbs a:hover { color: var(--gold); }

/* 11. 标签与数据 ------------------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-pill);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.tag--gold { color: #8A6520; border-color: rgba(200, 155, 60, 0.5); }
.tag--jade { color: var(--jade); border-color: rgba(31, 122, 92, 0.38); }
.tag--cinnabar { color: var(--cinnabar); border-color: rgba(192, 69, 47, 0.38); }

.stat { display: grid; gap: 6px; }
.stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 44px);
  line-height: 1;
  color: var(--gold);
}
.stat__label {
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}
.panel .stat__label { color: rgba(246, 241, 230, 0.72); }

/* 12. 图片容器（共享基础规则） ---------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--indigo-mid);
  isolation: isolate;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--plate { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame--horizon {
  aspect-ratio: 21 / 9;
  background-color: var(--indigo);
  background-image:
    linear-gradient(
      180deg,
      rgba(15, 27, 51, 0.94) 0%,
      rgba(27, 42, 74, 0.88) 44%,
      rgba(46, 66, 112, 0.6) 64%,
      rgba(231, 200, 122, 0.4) 80%,
      rgba(246, 241, 230, 0.92) 100%
    ),
    repeating-linear-gradient(90deg, rgba(231, 200, 122, 0.16) 0 1px, transparent 1px 46px);
}

.media-frame__caption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(255, 252, 245, 0.88);
}

/* 13. 标签页与筛选 ---------------------------------------- */
.tabs { display: block; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.tab {
  appearance: none;
  padding: 9px 18px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-pill);
  background: var(--paper);
  color: var(--ink-soft);
  font-size: 14.5px;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.tab:hover { color: var(--ink); border-color: rgba(200, 155, 60, 0.55); }
.tab[aria-selected="true"] {
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--paper);
}

.tab-panel { display: block; }

.filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
}

.filter__btn {
  appearance: none;
  padding: 8px 16px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-pill);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.filter__btn:hover { color: var(--ink); border-color: rgba(200, 155, 60, 0.6); }
.filter__btn.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--indigo-deep);
}

.filter__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

/* 14. 入场显现 -------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.32s ease, transform 0.32s ease;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* 15. 响应式 ---------------------------------------------- */
@media (max-width: 1080px) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  :root { --frame-w: min(1240px, 100% - 32px); }

  .site-header__bandInner {
    grid-template-columns: 1fr auto;
    gap: 14px;
    padding-block: 16px;
  }

  .nav-toggle { display: inline-flex; justify-self: end; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 5;
    padding: 12px clamp(16px, 5vw, 40px) 24px;
    background: var(--indigo-deep);
    border-bottom: 3px solid var(--gold);
    box-shadow: 0 24px 48px rgba(15, 27, 51, 0.38);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.24s ease, transform 0.24s ease, visibility 0.24s;
  }

  .site-header[data-open] .nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
  }

  .nav__link {
    justify-content: space-between;
    padding: 15px 12px;
    border-radius: 12px;
    border-bottom: 1px solid rgba(231, 200, 122, 0.14);
  }

  .nav__link[aria-current="page"] {
    background: rgba(200, 155, 60, 0.14);
    border-left: 3px solid var(--gold);
  }

  .nav__link[aria-current="page"]::after { display: none; }

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

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

@media (max-width: 640px) {
  body { font-size: 16px; }

  .site-header__meta { display: none; }
  .site-header__stripInner { justify-content: flex-end; padding-block: 10px; }

  .brand__motto { letter-spacing: 0.3em; }

  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
    padding-block: 48px 32px;
  }

  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .site-footer__bottom { justify-content: flex-start; }

  .filter__count { margin-left: 0; width: 100%; }
}

/* 16. 动效偏好 -------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress { transition: none; }
}