/* ==========================================================================
   美高梅中心 · 共享站点样式 (/assets/site.css)
   视觉逻辑：海报式分层构图 / 赌场夜色 / 档案索引语言 / 切角面板与斜线轨迹
   ========================================================================== */

:root {
  /* 主色阶 */
  --mg-red: #6B0F1A;
  --mg-wine: #8E1B2C;
  --mg-gold: #C9A24B;
  --mg-black: #101010;
  --mg-cream: #F8F1E7;
  /* 点缀 */
  --mg-jade: #2F7F7A;
  --mg-neon: #3B82F6;
  /* 辅助 */
  --mg-graphite: #2B2B2B;
  --mg-graygold: #A8874A;
  --mg-shadow: #3B070D;
  /* 线条 */
  --mg-hair: rgba(201, 162, 75, .26);
  --mg-hair-soft: rgba(248, 241, 231, .1);
  /* 字体 */
  --mg-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --mg-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mg-mono: "JetBrains Mono", "IBM Plex Mono", "Courier New", ui-monospace, monospace;
  /* 尺度 */
  --mg-wrap: 1240px;
  --mg-wrap-wide: 1560px;
  --mg-gutter: clamp(18px, 4vw, 64px);
  --mg-cut: 14px;
  --mg-radius: 2px;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--mg-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mg-cream);
  background-color: var(--mg-black);
  background-image:
    radial-gradient(120% 80% at 10% -12%, rgba(107, 15, 26, .92) 0%, rgba(107, 15, 26, 0) 62%),
    radial-gradient(90% 62% at 100% 0%, rgba(59, 7, 13, .95) 0%, rgba(59, 7, 13, 0) 58%),
    linear-gradient(180deg, #101010 0%, #17070B 42%, #101010 100%);
  background-repeat: no-repeat;
}

/* 细微噪点：强化“稳定版档案”质感 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .55;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(248, 241, 231, .022) 0 1px,
    rgba(248, 241, 231, 0) 1px 4px
  );
}

img { max-width: 100%; height: auto; }
a { color: var(--mg-gold); }
button { font: inherit; }
::selection { background: rgba(201, 162, 75, .32); color: #fff; }

:focus-visible {
  outline: 2px solid var(--mg-neon);
  outline-offset: 3px;
  border-radius: 1px;
}

#main-content { scroll-margin-top: 132px; }

/* ---------------------------- 中文排版与通用文本 ---------------------------- */
.mg-shell {
  width: 100%;
  max-width: var(--mg-wrap);
  margin-inline: auto;
  padding-inline: var(--mg-gutter);
}
.mg-shell--wide { max-width: var(--mg-wrap-wide); }

.mg-section { padding-block: clamp(48px, 7vw, 104px); }
.mg-section--tight { padding-block: clamp(28px, 4vw, 56px); }
.mg-section--flush { padding-block: 0; }

.mg-eyebrow {
  margin: 0 0 14px;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--mg-gold);
}
.mg-eyebrow--jade { color: var(--mg-jade); }

.mg-display {
  margin: 0 0 18px;
  font-family: var(--mg-serif);
  font-weight: 300;
  font-size: clamp(38px, 7vw, 92px);
  line-height: 1.02;
  letter-spacing: -.015em;
  color: var(--mg-cream);
}
.mg-display--xl {
  font-size: clamp(46px, 10.5vw, 148px);
  line-height: .96;
  letter-spacing: -.03em;
}
.mg-display em {
  font-style: normal;
  color: var(--mg-gold);
}

.mg-h2 {
  margin: 0 0 14px;
  font-family: var(--mg-serif);
  font-weight: 400;
  font-size: clamp(26px, 3.6vw, 46px);
  line-height: 1.2;
  letter-spacing: .01em;
}
.mg-h3 {
  margin: 0 0 10px;
  font-family: var(--mg-serif);
  font-weight: 500;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.35;
}
.mg-lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.9;
  color: rgba(248, 241, 231, .78);
}
.mg-meta {
  margin: 0;
  font-family: var(--mg-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(248, 241, 231, .55);
}
.mg-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(248, 241, 231, .58);
}
.mg-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;
}

.mg-rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, var(--mg-gold), rgba(201, 162, 75, .06) 70%, transparent);
}
.mg-rule--slash {
  height: 14px;
  background:
    linear-gradient(90deg, rgba(201, 162, 75, .8) 0 46px, transparent 46px 100%) left center / 100% 1px no-repeat,
    linear-gradient(115deg, transparent calc(50% - 1px), rgba(47, 127, 122, .85) 50%, transparent calc(50% + 1px)) right center / 180px 14px no-repeat;
}

/* ---------------------------- 跳转链接 ---------------------------- */
.mg-skip {
  position: absolute;
  top: 8px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  font-family: var(--mg-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: #1A0308;
  background: var(--mg-gold);
  text-decoration: none;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transform: translateY(-160%);
  transition: transform .2s ease;
}
.mg-skip:focus-visible { transform: translateY(0); }

/* ==========================================================================
   页头
   ========================================================================== */
.mg-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(16, 16, 16, .97) 0%, rgba(59, 7, 13, .93) 100%);
  border-bottom: 1px solid var(--mg-hair);
  backdrop-filter: blur(10px) saturate(1.1);
}

.mg-header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--mg-gold) 0%, var(--mg-jade) 62%, var(--mg-neon) 100%);
}

/* 顶层资料条 */
.mg-header__rail {
  border-bottom: 1px dashed rgba(201, 162, 75, .22);
  background: linear-gradient(90deg, rgba(107, 15, 26, .55) 0%, rgba(16, 16, 16, .12) 100%);
}
.mg-header__rail-inner {
  max-width: var(--mg-wrap-wide);
  margin-inline: auto;
  padding: 7px var(--mg-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: rgba(248, 241, 231, .6);
}
.mg-rail__note {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  white-space: nowrap;
}
.mg-rail__dot {
  width: 6px;
  height: 6px;
  background: var(--mg-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 10px rgba(201, 162, 75, .8);
}
.mg-util__list {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(12px, 2vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.mg-util__link {
  color: rgba(248, 241, 231, .66);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.mg-util__link:hover { color: var(--mg-gold); border-bottom-color: rgba(201, 162, 75, .6); }

/* 主行 */
.mg-header__bar {
  background: linear-gradient(180deg, rgba(142, 27, 44, .22) 0%, rgba(16, 16, 16, .06) 100%);
}
.mg-header__inner {
  max-width: var(--mg-wrap-wide);
  margin-inline: auto;
  padding: 12px var(--mg-gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(14px, 3vw, 40px);
}

.mg-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--mg-cream);
  text-decoration: none;
}
.mg-brand__mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  font-family: var(--mg-serif);
  font-size: 20px;
  color: var(--mg-gold);
  background: linear-gradient(150deg, rgba(107, 15, 26, .95) 0%, rgba(16, 16, 16, .92) 100%);
  border: 1px solid rgba(201, 162, 75, .55);
  clip-path: polygon(11px 0, 100% 0, 100% calc(100% - 11px), calc(100% - 11px) 100%, 0 100%, 0 11px);
}
.mg-brand__text { display: flex; flex-direction: column; line-height: 1.12; }
.mg-brand__name {
  font-family: var(--mg-serif);
  font-size: 21px;
  font-weight: 500;
  letter-spacing: .1em;
}
.mg-brand__sub {
  font-family: var(--mg-mono);
  font-size: 9.5px;
  letter-spacing: .32em;
  color: rgba(201, 162, 75, .78);
}

/* 主导航 */
.mg-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(8px, 1.6vw, 24px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.mg-nav__item { position: relative; }
.mg-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 15px;
  letter-spacing: .06em;
  color: rgba(248, 241, 231, .82);
  text-decoration: none;
  transition: color .2s ease;
}
.mg-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: linear-gradient(90deg, var(--mg-gold), rgba(201, 162, 75, 0));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .26s ease;
}
.mg-nav__link:hover,
.mg-nav__link:focus-visible { color: var(--mg-cream); }
.mg-nav__link:hover::after,
.mg-nav__link:focus-visible::after { transform: scaleX(1); }

.mg-nav__link[aria-current="page"] { color: var(--mg-gold); }
.mg-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--mg-gold), var(--mg-jade));
}
.mg-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 50%;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  background: var(--mg-jade);
  transform: rotate(45deg);
}

/* 行动区 / 按钮 */
.mg-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.mg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--mg-sans);
  font-size: 14px;
  line-height: 1.2;
  letter-spacing: .08em;
  color: var(--mg-cream);
  background: transparent;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background .22s ease, color .22s ease, border-color .22s ease, transform .22s ease;
}
.mg-btn--sm { padding: 8px 15px; font-size: 12.5px; letter-spacing: .1em; }
.mg-btn--gold {
  font-weight: 600;
  color: #1A0308;
  background: linear-gradient(135deg, #D9B45F 0%, #C9A24B 46%, #8E6C2A 100%);
}
.mg-btn--gold:hover { background: linear-gradient(135deg, #F0D089 0%, #D9B25C 52%, #A8874A 100%); transform: translateY(-1px); }
.mg-btn--line { color: var(--mg-gold); border-color: rgba(201, 162, 75, .55); }
.mg-btn--line:hover { color: var(--mg-cream); background: rgba(201, 162, 75, .14); }
.mg-btn--ghost { border-color: rgba(248, 241, 231, .24); }
.mg-btn--ghost:hover { color: #fff; background: rgba(47, 127, 122, .18); border-color: var(--mg-jade); }

.mg-burger {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  font-family: var(--mg-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mg-cream);
  background: rgba(248, 241, 231, .04);
  border: 1px solid rgba(201, 162, 75, .38);
  cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.mg-burger:hover { border-color: var(--mg-gold); }
.mg-burger__bars { display: inline-flex; flex-direction: column; gap: 5px; width: 20px; }
.mg-burger__bars span {
  display: block;
  height: 1.5px;
  background: var(--mg-gold);
  transition: transform .25s ease, opacity .25s ease;
}
.mg-header[data-open] .mg-burger__bars span:first-child { transform: translateY(3.25px) rotate(45deg); }
.mg-header[data-open] .mg-burger__bars span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

/* ==========================================================================
   页脚
   ========================================================================== */
.mg-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 112px);
  overflow: hidden;
  border-top: 1px solid var(--mg-hair);
  background: linear-gradient(180deg, #2A0509 0%, #15060A 46%, #0B0B0B 100%);
}
.mg-footer__glow {
  position: absolute;
  top: -180px;
  right: -140px;
  width: 540px;
  height: 540px;
  pointer-events: none;
  background: radial-gradient(circle, rgba(201, 162, 75, .18) 0%, rgba(201, 162, 75, 0) 66%);
}
.mg-footer__inner {
  position: relative;
  max-width: var(--mg-wrap-wide);
  margin-inline: auto;
  padding: clamp(38px, 6vw, 84px) var(--mg-gutter) clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.55fr);
  gap: clamp(28px, 4vw, 60px);
}

.mg-footer__brand { min-width: 0; }
.mg-footer__eyebrow {
  margin: 0 0 14px;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .26em;
  color: var(--mg-gold);
}
.mg-footer__statement {
  margin: 0 0 22px;
  max-width: 30ch;
  font-family: var(--mg-serif);
  font-weight: 300;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.5;
  color: var(--mg-cream);
}
.mg-footer__cta { display: flex; flex-wrap: wrap; gap: 12px; }

.mg-footer__maps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 38px);
  min-width: 0;
}
.mg-footcol__title {
  position: relative;
  margin: 0 0 16px;
  padding-bottom: 12px;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .26em;
  color: var(--mg-graygold);
}
.mg-footcol__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34px;
  height: 1px;
  background: linear-gradient(90deg, var(--mg-gold), rgba(201, 162, 75, 0));
}
.mg-footcol__list { margin: 0; padding: 0; list-style: none; }
.mg-footcol__list li + li { margin-top: 2px; }
.mg-footcol__list a {
  position: relative;
  display: inline-block;
  padding: 6px 0 6px 14px;
  font-size: 15px;
  color: rgba(248, 241, 231, .74);
  text-decoration: none;
  transition: color .2s ease, transform .2s ease;
}
.mg-footcol__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  background: rgba(201, 162, 75, .45);
  transform: rotate(45deg);
  transition: background .2s ease;
}
.mg-footcol__list a:hover { color: var(--mg-cream); transform: translateX(3px); }
.mg-footcol__list a:hover::before { background: var(--mg-jade); }

.mg-footer__contact {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px clamp(20px, 3vw, 44px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px dashed rgba(201, 162, 75, .24);
}
.mg-contact__line { margin: 0; min-width: 0; }
.mg-contact__key {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mg-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--mg-graygold);
}
.mg-contact__val {
  display: block;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(248, 241, 231, .82);
  overflow-wrap: anywhere;
}

.mg-footer__legal {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(10px, 2vw, 20px);
  padding-top: clamp(14px, 2vw, 22px);
  border-top: 1px solid var(--mg-hair-soft);
}
.mg-legal__copy {
  margin: 0;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: rgba(248, 241, 231, .5);
}
.mg-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
}
.mg-legal__links a { color: rgba(248, 241, 231, .6); text-decoration: none; }
.mg-legal__links a:hover { color: var(--mg-gold); }

/* ==========================================================================
   通用内容组件
   ========================================================================== */
/* 面包屑 */
.mg-breadcrumb { margin-bottom: clamp(18px, 2.5vw, 30px); }
.mg-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: rgba(248, 241, 231, .5);
}
.mg-breadcrumb__list a { color: rgba(248, 241, 231, .68); text-decoration: none; }
.mg-breadcrumb__list a:hover { color: var(--mg-gold); }
.mg-breadcrumb__sep { color: rgba(201, 162, 75, .5); }

/* 切角面板 */
.mg-panel {
  position: relative;
  padding: clamp(20px, 3vw, 38px);
  background: linear-gradient(155deg, rgba(142, 27, 44, .34) 0%, rgba(16, 16, 16, .72) 62%, rgba(59, 7, 13, .6) 100%);
  border: 1px solid var(--mg-hair);
  clip-path: polygon(var(--mg-cut) 0, 100% 0, 100% calc(100% - var(--mg-cut)), calc(100% - var(--mg-cut)) 100%, 0 100%, 0 var(--mg-cut));
}
.mg-panel--black {
  background: linear-gradient(160deg, rgba(24, 24, 24, .9) 0%, rgba(10, 10, 10, .92) 100%);
  border-color: rgba(248, 241, 231, .12);
}
.mg-panel--accent {
  border-color: rgba(47, 127, 122, .55);
  background: linear-gradient(160deg, rgba(47, 127, 122, .18) 0%, rgba(16, 16, 16, .85) 70%);
}

/* 网格 */
.mg-grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.mg-grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.mg-grid--3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.mg-grid--4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.mg-split {
  display: grid;
  gap: clamp(24px, 4vw, 64px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  align-items: start;
}

/* 索引列表（专题研究板） */
.mg-index { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--mg-hair); }
.mg-index__item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: clamp(12px, 2vw, 28px);
  padding: clamp(18px, 2.4vw, 28px) 0;
  border-bottom: 1px solid var(--mg-hair-soft);
  transition: background .25s ease;
}
.mg-index__item:hover { background: linear-gradient(90deg, rgba(107, 15, 26, .3), rgba(107, 15, 26, 0) 70%); }
.mg-index__num {
  font-family: var(--mg-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--mg-graygold);
  padding-top: 4px;
}
.mg-index__body { min-width: 0; }
.mg-index__title {
  margin: 0 0 8px;
  font-family: var(--mg-serif);
  font-weight: 500;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.35;
}
.mg-index__title a { color: var(--mg-cream); text-decoration: none; }
.mg-index__title a:hover { color: var(--mg-gold); }
.mg-index__desc {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(248, 241, 231, .7);
}
.mg-index__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* 标签 */
.mg-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--mg-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(248, 241, 231, .8);
  border: 1px solid rgba(248, 241, 231, .22);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}
.mg-tag--gold { color: var(--mg-gold); border-color: rgba(201, 162, 75, .55); }
.mg-tag--jade { color: #7FD6CF; border-color: rgba(47, 127, 122, .7); background: rgba(47, 127, 122, .14); }
.mg-tag--neon { color: #9CC4FF; border-color: rgba(59, 130, 246, .6); background: rgba(59, 130, 246, .12); }

/* 图文容器（页面阶段放置图片） */
.mg-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #2B0509 0%, #101010 56%, #1C1C1C 100%);
  border: 1px solid rgba(201, 162, 75, .18);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}
.mg-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.62) contrast(1.12) brightness(.92);
  transition: transform .6s ease, filter .4s ease;
}
.mg-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(248, 241, 231, .05) 0 1px,
    rgba(248, 241, 231, 0) 1px 3px
  );
  opacity: .5;
  mix-blend-mode: overlay;
}
.mg-media:hover img { transform: scale(1.035); filter: saturate(.82) contrast(1.06) brightness(1); }
.mg-media--wide { aspect-ratio: 21 / 9; }
.mg-media--square { aspect-ratio: 1 / 1; }
.mg-media--portrait { aspect-ratio: 3 / 4; }
.mg-media--tall { aspect-ratio: 4 / 5; }
.mg-media__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--mg-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: rgba(248, 241, 231, .55);
}

/* 长文排版 */
.mg-prose { max-width: 72ch; font-size: 16.5px; line-height: 1.9; color: rgba(248, 241, 231, .84); }
.mg-prose > * + * { margin-top: 1.1em; }
.mg-prose h2 {
  margin-top: 2.2em;
  font-family: var(--mg-serif);
  font-weight: 400;
  font-size: clamp(23px, 2.8vw, 32px);
  line-height: 1.3;
}
.mg-prose h3 { margin-top: 1.8em; font-family: var(--mg-serif); font-weight: 500; font-size: 20px; }
.mg-prose ul, .mg-prose ol { padding-left: 1.3em; }
.mg-prose li + li { margin-top: .5em; }
.mg-prose blockquote {
  margin-inline: 0;
  padding: 16px 22px;
  border-left: 2px solid var(--mg-gold);
  background: rgba(107, 15, 26, .26);
  color: rgba(248, 241, 231, .8);
}
.mg-prose a { color: var(--mg-gold); text-underline-offset: 4px; }
.mg-prose code {
  font-family: var(--mg-mono);
  font-size: 13.5px;
  padding: 2px 6px;
  color: #9CF0E8;
  background: rgba(47, 127, 122, .16);
}
.mg-prose hr { border: 0; height: 1px; background: var(--mg-hair); }

/* 版本对照 / 标签页 */
.mg-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px, 2.6vw, 30px);
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--mg-hair);
}
.mg-tabs__btn {
  padding: 11px 20px;
  font-family: var(--mg-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: rgba(248, 241, 231, .68);
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  cursor: pointer;
  clip-path: polygon(9px 0, 100% 0, 100% 100%, 0 100%, 0 9px);
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}
.mg-tabs__btn:hover { color: var(--mg-cream); background: rgba(248, 241, 231, .05); }
.mg-tabs__btn[aria-selected="true"] {
  color: #1A0308;
  font-weight: 600;
  background: linear-gradient(135deg, #D9B45F 0%, #C9A24B 55%, #A8874A 100%);
}
.mg-tabs__panel[hidden] { display: none; }
.mg-tabs__panel { padding-top: 4px; }

/* 显现动效协议 */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* 返回顶部（由 JS 注入） */
.mg-backtop {
  position: fixed;
  right: clamp(14px, 3vw, 34px);
  bottom: clamp(14px, 3vw, 34px);
  z-index: 120;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-family: var(--mg-mono);
  font-size: 16px;
  color: var(--mg-gold);
  background: rgba(16, 16, 16, .88);
  border: 1px solid rgba(201, 162, 75, .5);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, border-color .2s ease;
}
.mg-backtop.is-visible { opacity: 1; visibility: visible; transform: none; }
.mg-backtop:hover { border-color: var(--mg-jade); color: var(--mg-cream); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1180px) {
  .mg-split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 1080px) {
  .mg-burger { display: inline-flex; }

  .mg-nav {
    display: none;
    order: 5;
    flex: 1 0 100%;
    width: 100%;
    margin-top: 10px;
    border-top: 1px solid rgba(201, 162, 75, .22);
  }
  .mg-header[data-open] .mg-nav,
  .mg-nav[data-open] { display: block; }

  .mg-nav__list { flex-direction: column; align-items: stretch; gap: 0; padding: 6px 0 14px; }
  .mg-nav__link {
    display: block;
    padding: 13px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--mg-hair-soft);
  }
  .mg-nav__link::after { display: none; }
  .mg-nav__link[aria-current="page"] { padding-left: 20px; }
  .mg-nav__link[aria-current="page"]::before { left: 3px; }

  .mg-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .mg-footer__maps { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
}

@media (max-width: 720px) {
  .mg-header__rail-inner { font-size: 11px; letter-spacing: .1em; }
  .mg-footer__maps { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .mg-footcol { padding-bottom: 10px; border-bottom: 1px dashed var(--mg-hair-soft); }
  .mg-footcol__title { margin-bottom: 8px; }
  .mg-footcol__list { display: flex; flex-wrap: wrap; gap: 4px 18px; }
  .mg-footcol__list a { padding: 5px 0 5px 13px; font-size: 14.5px; }
  .mg-footer__statement { max-width: none; }
  .mg-legal__links { gap: 14px; }
}

@media (max-width: 620px) {
  .mg-rail__note { display: none; }
  .mg-header__rail-inner { justify-content: flex-start; }
  .mg-header__actions .mg-btn--gold { display: none; }
  .mg-burger__label { display: none; }
  .mg-brand__sub { letter-spacing: .22em; }
  .mg-index__item { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .mg-index__num { padding-top: 0; }
}

@media (max-width: 420px) {
  .mg-brand__name { font-size: 18px; }
  .mg-brand__mark { width: 36px; height: 36px; font-size: 17px; }
  .mg-btn { padding: 10px 15px; font-size: 13px; }
}

/* ==========================================================================
   偏好设置
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .mg-media:hover img { transform: none; }
  .mg-btn--gold:hover { transform: none; }
  .mg-footcol__list a:hover { transform: none; }
  .mg-skip { transition: none; }
}