/* ============================================================
   MG游戏站 · 共享样式表  /assets/site.css
   深靛蓝机房底色 + CRT 扫描线 + 纸张叠层档案卡
   ============================================================ */

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

html {
  background: #070B1E;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

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

ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
input, textarea, select { font: inherit; color: inherit; }

:root {
  --mg-night: #070B1E;
  --mg-deep: #11152B;
  --mg-panel: #1A1E33;
  --mg-line: #2C3352;
  --mg-line-soft: rgba(44, 51, 82, 0.6);
  --mg-cyan: #3AF0D2;
  --mg-orange: #FF7A2F;
  --mg-violet: #9A6BFF;
  --mg-lime: #C9FF57;
  --mg-ink: #F2F5FF;
  --mg-body-text: #DCE3F7;
  --mg-muted: #9AA6C9;
  --mg-muted-dim: #7B87B4;
  --mg-radius: 2px;
  --mg-font-display: "Oswald", "Archivo Narrow", "Arial Narrow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mg-font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mg-font-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "DejaVu Sans Mono", Consolas, "Liberation Mono", monospace;
  --mg-ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ---------- 底色与扫描线 ---------- */
body {
  min-height: 100vh;
  background: transparent;
  color: var(--mg-body-text);
  font: 400 16.5px / 1.85 var(--mg-font-body);
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(58, 240, 210, 0.10), transparent 70%),
    radial-gradient(820px 520px at 92% 2%, rgba(154, 107, 255, 0.10), transparent 72%),
    linear-gradient(180deg, #070B1E 0%, #0A1026 58%, #070B1E 100%);
}

body::after {
  content: "";
  position: fixed;
  left: 0;
  right: 0;
  top: -20%;
  height: 150%;
  z-index: 4;
  pointer-events: none;
  opacity: 0.55;
  background: repeating-linear-gradient(
    180deg,
    rgba(242, 245, 255, 0.05) 0 1px,
    rgba(242, 245, 255, 0) 1px 4px
  );
  animation: mg-scan 16s linear infinite;
}

@keyframes mg-scan {
  from { transform: translateY(0); }
  to   { transform: translateY(-32px); }
}

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

/* ---------- 排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--mg-font-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--mg-ink);
}

h1 { font-size: clamp(2.35rem, 5.2vw, 4.25rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.12rem, 1.6vw, 1.35rem); }
h4 { font-size: 1rem; letter-spacing: 0.02em; }

strong { color: var(--mg-ink); font-weight: 700; }

::selection { background: rgba(58, 240, 210, 0.28); color: #FFFFFF; }

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

html.mg-lock,
html.mg-lock body { overflow: hidden; }

/* ---------- 布局工具 ---------- */
.mg-shell {
  width: min(1200px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.mg-section { padding: clamp(2.4rem, 6vw, 5rem) 0; }

.mg-section__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

@media (min-width: 768px) {
  .mg-section__head {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: start;
  }
}

.mg-index {
  font: 400 clamp(2rem, 4.5vw, 3.25rem) / 1 var(--mg-font-mono);
  color: var(--mg-orange);
  letter-spacing: -0.04em;
}

.mg-section__title { font-size: clamp(1.55rem, 2.8vw, 2.1rem); }

.mg-section__lead {
  margin-top: 0.6rem;
  max-width: 62ch;
  color: var(--mg-muted);
  font-size: 16px;
  line-height: 1.85;
}

.mg-kicker {
  display: inline-block;
  font: 600 12px / 1 var(--mg-font-mono);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mg-cyan);
}

.mg-grid {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.6rem);
}

.mg-grid--2 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.mg-grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.mg-grid--asym { grid-template-columns: 1fr; }
.mg-grid--asym-r { grid-template-columns: 1fr; }

@media (min-width: 900px) {
  .mg-grid--asym {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
  .mg-grid--asym-r {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 正文容器 ---------- */
.mg-prose {
  max-width: 72ch;
  color: var(--mg-body-text);
}

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

.mg-prose h2 { margin-top: 2em; }
.mg-prose h3 { margin-top: 1.6em; }

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

.mg-prose a:hover { color: #7CF7E5; }

.mg-prose ul li {
  position: relative;
  padding-left: 1.35em;
  margin-top: 0.45em;
}

.mg-prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.76em;
  width: 8px;
  height: 1px;
  background: var(--mg-cyan);
}

.mg-prose code {
  font-family: var(--mg-font-mono);
  font-size: 0.9em;
  padding: 0.12em 0.42em;
  color: var(--mg-lime);
  background: var(--mg-panel);
  border: 1px solid var(--mg-line);
  border-radius: 2px;
}

/* ---------- 面包屑 ---------- */
.mg-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font: 400 12.5px / 1.6 var(--mg-font-mono);
  letter-spacing: 0.06em;
  color: var(--mg-muted);
}

.mg-breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

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

.mg-breadcrumb__link { color: var(--mg-muted); }
.mg-breadcrumb__link:hover { color: var(--mg-cyan); }
.mg-breadcrumb__current { color: var(--mg-ink); }

/* ---------- 按钮 ---------- */
.mg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.05rem;
  border: 1px solid var(--mg-line);
  border-radius: var(--mg-radius);
  background: rgba(26, 30, 51, 0.65);
  color: var(--mg-ink);
  font: 600 13.5px / 1 var(--mg-font-display);
  letter-spacing: 0.06em;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s var(--mg-ease), border-color 0.2s var(--mg-ease),
              color 0.2s var(--mg-ease), transform 0.2s var(--mg-ease);
}

.mg-btn:hover { border-color: rgba(58, 240, 210, 0.5); color: var(--mg-cyan); }

.mg-btn--cta {
  background: var(--mg-orange);
  border-color: var(--mg-orange);
  color: #16070A;
  box-shadow: 0 0 0 1px rgba(255, 122, 47, 0.25), 0 8px 22px rgba(255, 122, 47, 0.18);
}

.mg-btn--cta:hover {
  background: #FF9052;
  border-color: #FF9052;
  color: #16070A;
}

.mg-btn--ghost {
  background: transparent;
  border-color: rgba(58, 240, 210, 0.42);
  color: var(--mg-cyan);
}

.mg-btn--quiet {
  background: transparent;
  border-color: transparent;
  color: var(--mg-muted);
  padding-inline: 0.5rem;
}

.mg-btn--quiet:hover { color: var(--mg-ink); }

/* ---------- 胶囊标签与状态 ---------- */
.mg-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.44rem 0.72rem;
  border: 1px solid var(--mg-line);
  border-radius: 999px;
  background: rgba(26, 30, 51, 0.7);
  color: var(--mg-muted);
  font: 600 12px / 1 var(--mg-font-display);
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: color 0.2s var(--mg-ease), border-color 0.2s var(--mg-ease);
}

.mg-chip:hover { color: var(--mg-cyan); border-color: rgba(58, 240, 210, 0.5); }

.mg-chip--live {
  color: var(--mg-cyan);
  border-color: rgba(58, 240, 210, 0.42);
}

.mg-chip--live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mg-lime);
  box-shadow: 0 0 8px var(--mg-lime);
  animation: mg-pulse 2.6s ease-in-out infinite;
}

.mg-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.5rem;
  border-radius: var(--mg-radius);
  border: 1px solid rgba(154, 107, 255, 0.35);
  background: rgba(154, 107, 255, 0.16);
  color: #C6AAFF;
  font: 600 11px / 1.4 var(--mg-font-mono);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.mg-tag--cyan {
  border-color: rgba(58, 240, 210, 0.36);
  background: rgba(58, 240, 210, 0.13);
  color: #8DF7E6;
}

.mg-tag--orange {
  border-color: rgba(255, 122, 47, 0.4);
  background: rgba(255, 122, 47, 0.14);
  color: #FFB27F;
}

.mg-tag--lime {
  border-color: rgba(201, 255, 87, 0.36);
  background: rgba(201, 255, 87, 0.13);
  color: #DFFF9B;
}

.mg-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font: 600 12px / 1 var(--mg-font-mono);
  letter-spacing: 0.08em;
  color: var(--mg-muted);
}

.mg-status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mg-line);
}

.mg-status--live::before {
  background: var(--mg-cyan);
  box-shadow: 0 0 10px rgba(58, 240, 210, 0.8);
}

.mg-status--new::before {
  background: var(--mg-lime);
  box-shadow: 0 0 10px rgba(201, 255, 87, 0.8);
}

.mg-status--hold::before { background: var(--mg-orange); }

/* ---------- 卡片与面板 ---------- */
.mg-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: clamp(1.1rem, 2.2vw, 1.5rem);
  background: linear-gradient(160deg, #171C33 0%, #12162A 100%);
  border: 1px solid var(--mg-line);
  border-radius: var(--mg-radius);
  box-shadow: 6px 6px 0 -1px rgba(7, 11, 30, 0.9), 6px 6px 0 0 rgba(44, 51, 82, 0.55);
  transition: transform 0.22s var(--mg-ease), border-color 0.22s var(--mg-ease),
              box-shadow 0.22s var(--mg-ease);
}

.mg-card::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(154, 166, 201, 0.16);
  border-radius: 1px;
  pointer-events: none;
}

.mg-card:hover {
  transform: translateY(-4px);
  border-color: rgba(58, 240, 210, 0.42);
  box-shadow: 6px 10px 0 -1px rgba(7, 11, 30, 0.9), 0 0 0 1px rgba(58, 240, 210, 0.16);
}

.mg-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.mg-card__title {
  font-family: var(--mg-font-display);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: 0.01em;
  color: var(--mg-ink);
}

.mg-card__title a:hover { color: var(--mg-cyan); }

.mg-card__body {
  color: var(--mg-muted);
  font-size: 15px;
  line-height: 1.82;
}

.mg-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font: 400 12px / 1.6 var(--mg-font-mono);
  letter-spacing: 0.06em;
  color: var(--mg-muted-dim);
}

@media (min-width: 900px) {
  .mg-card--offset { margin-top: 2.25rem; }
}

.mg-panel {
  padding: clamp(1rem, 2vw, 1.4rem);
  background: var(--mg-deep);
  border: 1px solid var(--mg-line);
  border-radius: var(--mg-radius);
}

.mg-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.8rem;
  margin-bottom: 0.9rem;
  border-bottom: 1px solid var(--mg-line-soft);
  font: 600 12px / 1 var(--mg-font-mono);
  letter-spacing: 0.16em;
  color: var(--mg-muted-dim);
}

/* ---------- 折叠式服务清单 ---------- */
.mg-fold {
  border: 1px solid var(--mg-line);
  background: rgba(17, 21, 43, 0.75);
  border-radius: var(--mg-radius);
}

.mg-fold + .mg-fold { margin-top: -1px; }

.mg-fold__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.9rem;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s var(--mg-ease);
}

.mg-fold__summary::-webkit-details-marker { display: none; }
.mg-fold__summary:hover { background: rgba(58, 240, 210, 0.06); }
.mg-fold[open] .mg-fold__summary { background: rgba(58, 240, 210, 0.08); }

.mg-fold__num {
  min-width: 2.6em;
  font: 400 15px / 1 var(--mg-font-mono);
  letter-spacing: 0.04em;
  color: var(--mg-orange);
}

.mg-fold__title {
  font-family: var(--mg-font-display);
  font-weight: 700;
  font-size: 0.99rem;
  color: var(--mg-ink);
}

.mg-fold__state {
  font: 600 11px / 1 var(--mg-font-mono);
  letter-spacing: 0.1em;
  color: var(--mg-muted-dim);
}

.mg-fold[open] .mg-fold__state { color: var(--mg-cyan); }

.mg-fold__body {
  padding: 0 1.05rem 1.15rem calc(1.05rem + 3.5em);
  color: var(--mg-muted);
  font-size: 15px;
  line-height: 1.85;
}

.mg-fold__body > * + * { margin-top: 0.9rem; }

@media (max-width: 620px) {
  .mg-fold__body { padding-left: 1.05rem; }
}

/* ---------- 编号清单 ---------- */
.mg-list-index { display: flex; flex-direction: column; }

.mg-list-index__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--mg-line-soft);
}

.mg-list-index__row:first-child { border-top: 1px solid var(--mg-line-soft); }

.mg-list-index__num {
  font: 400 14px / 1.5 var(--mg-font-mono);
  letter-spacing: 0.08em;
  color: var(--mg-violet);
}

.mg-list-index__text { color: var(--mg-ink); }

.mg-list-index__state {
  font: 400 12px / 1.6 var(--mg-font-mono);
  letter-spacing: 0.06em;
  color: var(--mg-muted-dim);
}

/* ---------- 图片容器基础 ---------- */
.mg-figure { margin: 0; }

.mg-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--mg-line);
  border-radius: var(--mg-radius);
  background:
    repeating-linear-gradient(135deg, rgba(44, 51, 82, 0.5) 0 6px, rgba(17, 21, 43, 0.9) 6px 12px);
}

.mg-media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.04);
}

.mg-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.7;
  background: repeating-linear-gradient(
    180deg,
    rgba(7, 11, 30, 0.22) 0 1px,
    rgba(7, 11, 30, 0) 1px 3px
  );
}

.mg-media--square { aspect-ratio: 1 / 1; }
.mg-media--portrait { aspect-ratio: 4 / 5; }
.mg-media--tall { aspect-ratio: 3 / 4; }
.mg-media--wide { aspect-ratio: 21 / 9; }

.mg-media__badge {
  position: absolute;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 2;
}

.mg-media__caption {
  margin-top: 0.65rem;
  font: 400 13px / 1.7 var(--mg-font-body);
  color: var(--mg-muted-dim);
}

/* ---------- 头部 ---------- */
.mg-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 0.7rem clamp(0.7rem, 2vw, 1.4rem) 0;
  pointer-events: none;
}

.mg-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  z-index: 90;
  pointer-events: none;
  background: linear-gradient(90deg, var(--mg-cyan), var(--mg-violet));
  transition: width 0.12s linear;
}

.mg-skip {
  position: absolute;
  left: 50%;
  top: 0.5rem;
  z-index: 100;
  padding: 0.62rem 1.05rem;
  border-radius: var(--mg-radius);
  background: var(--mg-cyan);
  color: #06121A;
  font: 700 13px / 1 var(--mg-font-display);
  letter-spacing: 0.06em;
  transform: translate(-50%, -180%);
  transition: transform 0.2s var(--mg-ease);
  pointer-events: auto;
}

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

.mg-header__island {
  position: relative;
  width: min(1200px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.42rem 0.55rem 0.42rem 0.72rem;
  border: 1px solid var(--mg-line);
  border-radius: 999px;
  background: rgba(17, 21, 43, 0.86);
  box-shadow: 0 12px 34px rgba(4, 7, 20, 0.55), inset 0 1px 0 rgba(242, 245, 255, 0.05);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  pointer-events: auto;
  transition: width 0.35s var(--mg-ease), background-color 0.3s var(--mg-ease),
              border-color 0.3s var(--mg-ease);
}

.mg-header[data-compact] .mg-header__island {
  width: min(1000px, 100%);
  background: rgba(11, 15, 33, 0.95);
  border-color: rgba(58, 240, 210, 0.24);
}

/* 品牌 */
.mg-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: 0 0 auto;
  position: relative;
  z-index: 80;
}

.mg-brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(58, 240, 210, 0.5);
  border-radius: var(--mg-radius);
  background: linear-gradient(140deg, rgba(58, 240, 210, 0.18), rgba(154, 107, 255, 0.14));
}

.mg-brand__mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px dashed rgba(242, 245, 255, 0.18);
}

.mg-brand__glyph {
  font: 800 13px / 1 var(--mg-font-display);
  letter-spacing: 0.08em;
  color: var(--mg-cyan);
}

.mg-brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.mg-brand__name {
  font: 800 15px / 1.1 var(--mg-font-display);
  letter-spacing: 0.04em;
  color: var(--mg-ink);
}

.mg-brand__sub {
  font: 400 10.5px / 1 var(--mg-font-mono);
  letter-spacing: 0.1em;
  color: var(--mg-muted);
}

/* 移动导航按钮 */
.mg-navtoggle {
  position: relative;
  z-index: 80;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.82rem;
  border: 1px solid var(--mg-line);
  border-radius: 999px;
  background: rgba(26, 30, 51, 0.9);
  color: var(--mg-ink);
  font: 600 12px / 1 var(--mg-font-display);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 0.2s var(--mg-ease), color 0.2s var(--mg-ease);
}

.mg-navtoggle:hover { border-color: rgba(58, 240, 210, 0.5); color: var(--mg-cyan); }

.mg-navtoggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.mg-navtoggle__bar {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: var(--mg-cyan);
  transition: transform 0.22s var(--mg-ease), opacity 0.22s var(--mg-ease);
}

.mg-navtoggle[aria-expanded="true"] .mg-navtoggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mg-navtoggle[aria-expanded="true"] .mg-navtoggle__bar:nth-child(2) { opacity: 0; }
.mg-navtoggle[aria-expanded="true"] .mg-navtoggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mg-navtoggle__label { white-space: nowrap; }

/* 导航（移动优先：全屏清单） */
.mg-nav {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  padding: 5.6rem 1.25rem 2.2rem;
  overflow-y: auto;
  background:
    radial-gradient(700px 420px at 80% -10%, rgba(58, 240, 210, 0.1), transparent 70%),
    rgba(7, 11, 30, 0.98);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.24s var(--mg-ease), transform 0.24s var(--mg-ease), visibility 0.24s;
}

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

.mg-nav__list {
  counter-reset: mg-nav;
  display: flex;
  flex-direction: column;
}

.mg-nav__item {
  counter-increment: mg-nav;
  border-bottom: 1px solid var(--mg-line-soft);
}

.mg-nav__link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.95rem 0.4rem;
  font: 800 19px / 1.25 var(--mg-font-display);
  letter-spacing: 0.02em;
  color: var(--mg-ink);
  transition: color 0.2s var(--mg-ease);
}

.mg-nav__link::before {
  content: counter(mg-nav, decimal-leading-zero);
  font: 400 11px / 1 var(--mg-font-mono);
  letter-spacing: 0.1em;
  color: var(--mg-muted-dim);
}

.mg-nav__link:hover { color: var(--mg-cyan); }

.mg-nav__link[aria-current="page"] { color: var(--mg-cyan); }
.mg-nav__link[aria-current="page"]::before { color: var(--mg-orange); }

.mg-nav__utility {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mg-nav__foot { display: flex; flex-direction: column; }
.mg-nav__foot .mg-btn { width: 100%; }

@media (min-width: 1120px) {
  .mg-header { padding-top: 0.85rem; }

  .mg-navtoggle { display: none; }

  .mg-nav {
    position: static;
    inset: auto;
    z-index: auto;
    flex: 1 1 auto;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.8rem;
    padding: 0;
    overflow: visible;
    background: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .mg-nav[data-open] { opacity: 1; }

  .mg-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 0.1rem;
    margin-right: auto;
  }

  .mg-nav__item { border-bottom: 0; }

  .mg-nav__link {
    padding: 0.5rem 0.68rem;
    border-radius: 999px;
    font: 600 13.5px / 1 var(--mg-font-display);
    letter-spacing: 0.04em;
    color: var(--mg-muted);
  }

  .mg-nav__link::before { display: none; }

  .mg-nav__link:hover {
    color: var(--mg-ink);
    background: rgba(58, 240, 210, 0.09);
  }

  .mg-nav__link[aria-current="page"] {
    color: var(--mg-ink);
    background: rgba(58, 240, 210, 0.12);
    box-shadow: inset 0 0 0 1px rgba(58, 240, 210, 0.45);
  }

  .mg-nav__utility { display: none; }

  .mg-nav__foot { display: block; flex: 0 0 auto; }
  .mg-nav__foot .mg-btn { width: auto; }
}

@media (min-width: 1280px) {
  .mg-nav__utility { display: flex; margin-right: 0.55rem; }
}

/* 年代刻度条 */
.mg-scale { display: none; }

@media (min-width: 1120px) {
  .mg-scale {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    width: min(1200px, 100%);
    margin: 0.35rem auto 0;
    padding: 0.3rem 1.5rem 0.35rem;
    transition: opacity 0.3s var(--mg-ease), transform 0.3s var(--mg-ease);
  }

  .mg-scale::before {
    content: "";
    position: absolute;
    left: 1.8rem;
    right: 1.8rem;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--mg-line) 14%, var(--mg-line) 86%, transparent);
  }

  .mg-scale__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    font: 400 10px / 1 var(--mg-font-mono);
    letter-spacing: 0.1em;
    color: var(--mg-muted-dim);
  }

  .mg-scale__tick {
    width: 1px;
    height: 6px;
    background: var(--mg-line);
  }

  .mg-scale__item--now .mg-scale__year { color: var(--mg-cyan); }

  .mg-scale__item--now .mg-scale__tick {
    background: var(--mg-cyan);
    box-shadow: 0 0 8px var(--mg-cyan);
  }

  .mg-header[data-compact] .mg-scale {
    opacity: 0;
    transform: translateY(-8px);
  }
}

/* ---------- 页脚 ---------- */
.mg-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--mg-line);
  background:
    linear-gradient(180deg, rgba(17, 21, 43, 0.92), rgba(7, 11, 30, 1)),
    repeating-linear-gradient(90deg, rgba(44, 51, 82, 0.32) 0 1px, transparent 1px 44px);
}

.mg-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(260px, 44vw);
  height: 2px;
  background: linear-gradient(90deg, var(--mg-cyan), rgba(58, 240, 210, 0));
}

.mg-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 4vw, 3rem);
  padding: clamp(2.2rem, 5vw, 3.4rem) 0 clamp(1.4rem, 3vw, 2rem);
}

@media (min-width: 900px) {
  .mg-footer__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

.mg-footer__name {
  font: 800 1.15rem / 1.3 var(--mg-font-display);
  letter-spacing: 0.03em;
  color: var(--mg-ink);
}

.mg-footer__tag {
  margin-top: 0.55rem;
  font: 400 12px / 1.7 var(--mg-font-mono);
  letter-spacing: 0.14em;
  color: var(--mg-cyan);
}

.mg-footer__line {
  margin-top: 1rem;
  max-width: 44ch;
  color: var(--mg-muted);
  font-size: 14.5px;
  line-height: 1.85;
}

.mg-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

.mg-footer__contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font: 400 13px / 1.6 var(--mg-font-mono);
}

.mg-footer__label {
  padding: 0.16rem 0.42rem;
  border: 1px solid var(--mg-line);
  border-radius: var(--mg-radius);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mg-muted-dim);
}

.mg-footer__value { color: #C9D2EE; word-break: break-all; }

.mg-copy {
  padding: 0.22rem 0.5rem;
  border: 1px solid var(--mg-line);
  border-radius: var(--mg-radius);
  color: var(--mg-muted-dim);
  font: 600 11px / 1.2 var(--mg-font-mono);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.2s var(--mg-ease), border-color 0.2s var(--mg-ease),
              background-color 0.2s var(--mg-ease);
}

.mg-copy:hover {
  color: var(--mg-cyan);
  border-color: rgba(58, 240, 210, 0.5);
}

.mg-copy[data-copied] {
  background: var(--mg-lime);
  border-color: var(--mg-lime);
  color: #0B1020;
}

.mg-footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.6rem;
}

@media (max-width: 520px) {
  .mg-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.mg-footer__title {
  padding-bottom: 0.7rem;
  margin-bottom: 0.85rem;
  border-bottom: 1px solid var(--mg-line-soft);
  font: 600 11.5px / 1 var(--mg-font-mono);
  letter-spacing: 0.2em;
  color: var(--mg-muted-dim);
}

.mg-footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.mg-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 14px;
  color: var(--mg-muted);
  transition: color 0.2s var(--mg-ease);
}

.mg-footer__link::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  background: var(--mg-line);
  transition: background-color 0.2s var(--mg-ease);
}

.mg-footer__link:hover { color: var(--mg-ink); }
.mg-footer__link:hover::before { background: var(--mg-cyan); }

.mg-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 1rem 0 1.5rem;
  border-top: 1px solid var(--mg-line-soft);
  font: 400 12px / 1.7 var(--mg-font-mono);
  letter-spacing: 0.06em;
  color: var(--mg-muted-dim);
}

/* ---------- 返回顶部 ---------- */
.mg-backtop {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 0.88rem;
  border: 1px solid rgba(58, 240, 210, 0.4);
  border-radius: 999px;
  background: rgba(26, 30, 51, 0.94);
  color: var(--mg-cyan);
  font: 600 12px / 1 var(--mg-font-mono);
  letter-spacing: 0.08em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s var(--mg-ease), transform 0.25s var(--mg-ease),
              visibility 0.25s, border-color 0.2s var(--mg-ease);
}

.mg-backtop[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.mg-backtop:hover { border-color: var(--mg-cyan); }

/* ---------- 显示动画协议 ---------- */
html.mg-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--mg-ease), transform 0.6s var(--mg-ease);
}

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

/* ---------- 自适应细节 ---------- */
@media (max-width: 600px) {
  .mg-shell { width: calc(100% - 1.6rem); }
  body { font-size: 16px; }
  .mg-backtop {
    right: 0.75rem;
    bottom: 0.75rem;
    padding: 0.55rem 0.7rem;
  }
  .mg-backtop span:last-child { display: none; }
}

@media (min-width: 601px) and (max-width: 1119px) {
  .mg-shell { width: calc(100% - 3rem); }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  body::after { animation: none; }

  .mg-chip--live::before { animation: none; }

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

  .mg-card:hover,
  .mg-card--offset:hover { transform: none; }

  .mg-backtop,
  .mg-nav,
  .mg-header__island,
  .mg-scale,
  .mg-progress {
    transition-duration: 0.01ms;
  }

  .mg-navtoggle__bar { transition: none; }
}