/* ==========================================================================
   四喜娱乐 · 全站共享样式  /assets/site.css
   档案室体系：深墨蓝底 · 暖纸色面 · 朱红盖章 · 鎏金刻度
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  min-width: 320px;
}

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

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

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

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

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

table { border-collapse: collapse; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色板 */
  --c-navy: #0D1726;
  --c-navy-2: #122032;
  --c-navy-3: #1A2A3F;
  --c-paper: #F4E9D8;
  --c-paper-2: #FBF4E6;
  --c-vermilion: #C8322B;
  --c-vermilion-2: #9E251F;
  --c-gold: #C9A24A;
  --c-gold-2: #E8C97A;
  --c-ink: #070C12;
  --c-slate: #6B7A8F;
  --c-jade: #2F7D6E;
  --c-alert: #D9772A;

  /* 派生 */
  --line-gold: rgba(201, 162, 74, .28);
  --line-gold-soft: rgba(201, 162, 74, .14);
  --paper-82: rgba(244, 233, 216, .82);
  --paper-72: rgba(244, 233, 216, .72);
  --paper-56: rgba(244, 233, 216, .56);
  --navy-72: rgba(13, 23, 38, .76);
  --navy-56: rgba(13, 23, 38, .58);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 字号阶梯 */
  --step--1: clamp(12.5px, 0.78rem, 13.5px);
  --step-0: clamp(16px, 1.02rem, 17.5px);
  --step-1: clamp(18px, 1.15rem, 20px);
  --step-2: clamp(23px, 1.6rem, 28px);
  --step-3: clamp(28px, 2.4rem, 38px);
  --step-4: clamp(36px, 3.3rem, 50px);
  --step-5: clamp(44px, 4.5rem, 70px);

  /* 结构 */
  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 44px);
  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 22px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-navy);
  background-image:
    radial-gradient(circle at 6% -8%, rgba(200, 50, 43, .17), transparent 44%),
    radial-gradient(circle at 97% 106%, rgba(201, 162, 74, .13), transparent 46%);
  background-attachment: fixed;
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.75;
  letter-spacing: .005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--c-paper);
}

h1 { font-size: var(--step-5); letter-spacing: -.022em; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }
h5 { font-size: var(--step-0); }

p { color: var(--paper-72); }

strong, b { font-weight: 700; color: var(--c-paper); }

small { font-size: var(--step--1); }

#main-content { display: block; }

/* 焦点可见性 */
:focus { outline: none; }

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

::selection {
  background: var(--c-vermilion);
  color: var(--c-paper-2);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 6px;
  left: 6px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 11px 20px;
  background: var(--c-gold-2);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  border-radius: 0 0 var(--radius-m) var(--radius-m);
  transition: transform .2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. 页头：左右分置 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--c-ink);
  color: var(--c-paper);
  border-bottom: 1px solid var(--line-gold);
  transition: box-shadow .24s var(--ease), background-color .24s var(--ease);
}

.site-header[data-shrunk="true"] {
  background: #05090E;
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .98);
}

.header-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 38fr) minmax(0, 62fr);
  align-items: center;
  gap: clamp(12px, 2vw, 34px);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 0 var(--gutter);
  min-height: 86px;
  transition: min-height .24s var(--ease);
}

.site-header[data-shrunk="true"] .header-inner { min-height: 66px; }

/* 品牌签名 */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-seal {
  flex: none;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: linear-gradient(150deg, var(--c-vermilion), var(--c-vermilion-2));
  color: var(--c-gold-2);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .04em;
  line-height: 1;
  border-radius: 4px 15px 4px 15px;
  box-shadow: inset 0 0 0 1px rgba(232, 201, 122, .5);
  transition: transform .24s var(--ease), border-radius .24s var(--ease);
}

.brand:hover .brand-seal,
.brand:focus-visible .brand-seal {
  transform: rotate(-4deg);
  border-radius: 15px 4px 15px 4px;
}

.brand-words { min-width: 0; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 1.35vw, 20px);
  letter-spacing: .02em;
  line-height: 1.25;
  color: var(--c-paper);
  white-space: nowrap;
}

.brand-sub {
  display: block;
  margin-top: 1px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-gold);
  white-space: nowrap;
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  justify-self: end;
  padding: 9px 15px;
  background: transparent;
  color: var(--c-gold-2);
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.nav-toggle:hover { border-color: var(--c-gold-2); }

.tg-glyph {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color .2s var(--ease);
}

.tg-glyph::before,
.tg-glyph::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .22s var(--ease);
}

.tg-glyph::before { top: -6px; }
.tg-glyph::after { top: 6px; }

.site-header[data-open="true"] .tg-glyph { background: transparent; }
.site-header[data-open="true"] .tg-glyph::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .tg-glyph::after { transform: translateY(-6px) rotate(-45deg); }

/* 主导航 */
.site-nav {
  position: relative;
  z-index: 5;
  justify-self: end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.1vw, 20px);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 11px 4px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .015em;
  color: var(--paper-82);
  white-space: nowrap;
  transition: color .2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 5px;
  height: 2px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .22s var(--ease), background-color .22s var(--ease);
}

.nav-link:hover { color: var(--c-gold-2); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--c-gold-2); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-vermilion);
}

/* 滚动进度 */
.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  display: block;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-vermilion), var(--c-gold-2));
  transition: width .1s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 110px);
  background: var(--c-ink);
  border-top: 1px solid var(--line-gold);
  color: var(--paper-72);
  font-size: 14.5px;
  line-height: 1.72;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 38%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-vermilion), var(--c-gold-2));
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, .85fr) minmax(0, 1.3fr);
  gap: clamp(24px, 3vw, 52px);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(38px, 5vw, 66px) var(--gutter) clamp(26px, 3vw, 38px);
}

.footer-col--brand { max-width: 42ch; }

.footer-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 2.1vw, 30px);
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--c-paper);
}

.footer-brand::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 14px;
  background: var(--c-vermilion);
}

.footer-tagline {
  margin-top: 16px;
  font-size: 14px;
  color: var(--paper-56);
}

.footer-hours {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-gold);
}

.footer-heading {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.footer-nav li { line-height: 1.5; }

.footer-nav a {
  display: inline-block;
  padding: 5px 0;
  color: var(--paper-72);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--c-gold-2);
  border-bottom-color: rgba(232, 201, 122, .5);
}

.footer-contact li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  padding-block: 6px;
}

.footer-label {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-gold);
}

.footer-value {
  color: var(--paper-72);
  overflow-wrap: anywhere;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 18px var(--gutter) 30px;
  border-top: 1px solid var(--line-gold-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--c-slate);
}

.footer-base p { color: inherit; font-size: inherit; }

/* ---------- 7. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px);
}

.section--ink { background: var(--c-ink); }

.section--paper {
  background: var(--c-paper);
  color: var(--c-navy);
}

.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4 { color: var(--c-navy); }

.section--paper p { color: var(--navy-72); }

.section--paper .eyebrow { color: var(--c-vermilion); }

.section--paper .meta,
.section--paper .media-caption { color: var(--navy-56); }

.hairline {
  height: 1px;
  border: 0;
  background: var(--line-gold-soft);
}

/* ---------- 8. 通用排版模块 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .75;
}

.meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--paper-56);
}

.prose { max-width: 72ch; }

.prose > * + * { margin-top: 1.05em; }

.prose h2 { margin-top: 1.9em; }
.prose h3 { margin-top: 1.6em; }
.prose h4 { margin-top: 1.4em; }

.prose ul,
.prose ol {
  padding-left: 1.35em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li { color: var(--paper-72); }
.prose li + li { margin-top: .35em; }

.prose a {
  color: var(--c-gold-2);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.section--paper .prose li,
.section--paper .prose a { color: var(--c-navy); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 3px 15px 3px 15px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--c-vermilion);
  color: var(--c-paper-2);
  box-shadow: inset 0 0 0 1px rgba(232, 201, 122, .38);
}

.btn--primary:hover { background: var(--c-vermilion-2); color: var(--c-gold-2); }

.btn--gold { background: var(--c-gold); color: var(--c-ink); }
.btn--gold:hover { background: var(--c-gold-2); }

.btn--ghost {
  background: transparent;
  color: var(--c-paper);
  border-color: var(--line-gold);
}

.btn--ghost:hover { border-color: var(--c-gold-2); color: var(--c-gold-2); }

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .08em;
  color: var(--paper-56);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-gold);
  opacity: .6;
}

.breadcrumb a { color: inherit; transition: color .2s var(--ease); }
.breadcrumb a:hover { color: var(--c-gold-2); }
.breadcrumb [aria-current="page"] { color: var(--c-gold); }

.section--paper .breadcrumb { color: var(--navy-56); }
.section--paper .breadcrumb [aria-current="page"] { color: var(--c-vermilion); }

/* ---------- 11. 面板 / 标签 / 网格 ---------- */
.panel {
  padding: clamp(20px, 3vw, 34px);
  background: var(--c-navy-2);
  border: 1px solid var(--line-gold-soft);
  border-radius: var(--radius-m);
}

.panel--paper {
  background: var(--c-paper);
  color: var(--c-navy);
  border-color: rgba(13, 23, 38, .12);
}

.panel--paper p { color: var(--navy-72); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  white-space: nowrap;
  color: var(--c-gold);
  background: rgba(201, 162, 74, .1);
  border: 1px solid var(--line-gold);
  border-radius: 999px;
}

.tag--vermilion {
  color: #F2ADA6;
  background: rgba(200, 50, 43, .16);
  border-color: rgba(200, 50, 43, .48);
}

.tag--jade {
  color: #8ED3C4;
  background: rgba(47, 125, 110, .18);
  border-color: rgba(47, 125, 110, .48);
}

.tag--alert {
  color: #F0B77E;
  background: rgba(217, 119, 42, .16);
  border-color: rgba(217, 119, 42, .48);
}

.tag--paper {
  color: var(--c-navy);
  background: rgba(13, 23, 38, .06);
  border-color: rgba(13, 23, 38, .2);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ---------- 12. 图片容器（供页面阶段放置截图/标签特写） ---------- */
.media-figure { margin: 0; }

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-gold-soft);
  background: linear-gradient(155deg, var(--c-navy-3), var(--c-ink));
  isolation: isolate;
}

.media-frame > img,
.media-frame > picture > img,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(232, 201, 122, .16);
  background: linear-gradient(180deg, rgba(13, 23, 38, 0) 56%, rgba(13, 23, 38, .45) 100%);
}

.media-frame[data-ratio="21:9"] { aspect-ratio: 21 / 9; }
.media-frame[data-ratio="16:9"] { aspect-ratio: 16 / 9; }
.media-frame[data-ratio="4:3"]  { aspect-ratio: 4 / 3; }
.media-frame[data-ratio="1:1"]  { aspect-ratio: 1 / 1; }
.media-frame[data-ratio="3:4"]  { aspect-ratio: 3 / 4; }

.media-frame--tilt { transform: rotate(-.6deg); }

.section--paper .media-frame {
  border-color: rgba(13, 23, 38, .12);
  background: linear-gradient(155deg, #E4D6BF, #CFBFA3);
}

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--paper-56);
}

/* ---------- 13. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 34px);
  bottom: clamp(14px, 3vw, 34px);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  padding: 0;
  background: var(--c-vermilion);
  color: var(--c-paper-2);
  border: 1px solid var(--c-gold);
  border-radius: 50% 50% 6px 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .24s var(--ease), transform .24s var(--ease),
              visibility .24s var(--ease), background-color .2s var(--ease);
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover { background: var(--c-vermilion-2); }

.to-top-glyph {
  display: block;
  font-size: 17px;
  line-height: 1;
}

.to-top-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- 14. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .34s var(--ease), transform .34s var(--ease);
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1200px) and (min-width: 981px) {
  .nav-list { gap: 8px; }
  .nav-link { font-size: 14px; padding-inline: 3px; }
  .nav-link::after { left: 3px; right: 3px; }
}

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 40px;
  }
}

@media (max-width: 980px) {
  html { scroll-padding-top: 82px; }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    min-height: 74px;
    padding-block: 12px;
  }

  .site-header[data-shrunk="true"] .header-inner { min-height: 66px; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    justify-self: stretch;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background: var(--c-ink);
    border-bottom: 1px solid var(--line-gold);
    transition: max-height .3s var(--ease), visibility .3s var(--ease);
  }

  .site-header[data-open="true"] .site-nav {
    max-height: min(72vh, 560px);
    overflow-y: auto;
    visibility: visible;
  }

  .nav-list {
    display: block;
    padding: 10px var(--gutter) 24px;
  }

  .nav-list li + li { border-top: 1px solid var(--line-gold-soft); }

  .nav-link {
    display: block;
    padding: 15px 2px;
    font-size: 17px;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    padding-left: 12px;
    border-left: 3px solid var(--c-vermilion);
  }

  .header-progress { height: 2px; }
}

@media (max-width: 680px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .to-top {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 420px) {
  .brand-seal { width: 40px; height: 40px; font-size: 13px; }
  .tg-text { display: none; }
  .nav-toggle { padding: 10px 12px; }
}

/* ---------- 16. 无障碍与动效偏好 ---------- */
@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;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .media-frame--tilt { transform: none; }

  .to-top { transform: none; }
}