/* ==========================================================================
   满冠体育 · 赛讯 — 全站共享样式
   文件：/assets/site.css
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --mgu-bg: #0E0D0B;
  --mgu-surface: #151310;
  --mgu-surface-2: #1B1712;
  --mgu-cream: #F4E9D8;
  --mgu-muted: #B8A98A;
  --mgu-red: #E8532E;
  --mgu-red-deep: #C43D1C;
  --mgu-blue: #2E5E8C;
  --mgu-blue-bright: #3A7CA5;
  --mgu-gold: #D4A64F;
  --mgu-line: rgba(244, 233, 216, 0.3);
  --mgu-line-strong: rgba(244, 233, 216, 0.5);
  --mgu-line-weak: rgba(244, 233, 216, 0.08);
  --mgu-shadow: rgba(0, 0, 0, 0.5);
  --mgu-glow: rgba(232, 83, 46, 0.35);

  --mgu-font-display: Impact, 'Arial Narrow', 'Franklin Gothic Bold', 'Helvetica Neue Condensed', sans-serif;
  --mgu-font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --mgu-font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

  --mgu-container-max: 1200px;
  --mgu-radius: 6px;
  --mgu-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --mgu-speed: 0.25s;
  --mgu-reveal-delay: 0ms;
}

/* 旧版色温：金 / 蓝 */
[data-version="classic"] {
  --mgu-bg: #12100D;
  --mgu-surface: #161411;
  --mgu-surface-2: #1D1913;
  --mgu-red: #D4A64F;
  --mgu-red-deep: #A87B2C;
  --mgu-blue: #3A7CA5;
  --mgu-blue-bright: #5A9CC6;
  --mgu-glow: rgba(212, 166, 79, 0.35);
  --mgu-line: rgba(244, 233, 216, 0.22);
  --mgu-line-strong: rgba(244, 233, 216, 0.38);
}

/* ---------- 2. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

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

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--mgu-bg);
  color: var(--mgu-cream);
  font-family: var(--mgu-font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1 0 auto;
}

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

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

button {
  background: none;
  border: none;
  cursor: pointer;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--mgu-font-display);
  font-weight: 700;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--mgu-cream);
}

p {
  margin-bottom: 1em;
}

::selection {
  background: var(--mgu-red);
  color: var(--mgu-bg);
}

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

/* ---------- 3. 排版辅助 ---------- */
.mgu-display {
  font-family: var(--mgu-font-display);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 66px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--mgu-cream);
}

.mgu-display em {
  font-style: italic;
  color: var(--mgu-red);
}

.mgu-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mgu-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mgu-blue);
}

.mgu-kicker::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--mgu-blue);
}

.mgu-kicker--red {
  color: var(--mgu-red);
}

.mgu-kicker--red::before {
  background: var(--mgu-red);
}

.mgu-kicker--gold {
  color: var(--mgu-gold);
}

.mgu-kicker--gold::before {
  background: var(--mgu-gold);
}

.mgu-lead {
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--mgu-muted);
}

.mgu-chapter {
  position: relative;
  padding-left: clamp(68px, 12vw, 112px);
}

.mgu-chapter__num {
  position: absolute;
  left: 0;
  top: -0.12em;
  font-family: var(--mgu-font-display);
  font-weight: 700;
  font-size: clamp(48px, 8vw, 82px);
  line-height: 1;
  color: rgba(244, 233, 216, 0.12);
  -webkit-text-stroke: 1px rgba(244, 233, 216, 0.38);
  letter-spacing: 0.02em;
  user-select: none;
}

.mgu-chapter__num::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--mgu-red);
  margin-left: 10px;
  vertical-align: top;
  transform: translateY(0.2em);
}

.mgu-chapter__label {
  font-family: var(--mgu-font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--mgu-cream);
}

/* ---------- 4. 容器 / 网格 / 章节 ---------- */
.mgu-container {
  width: min(var(--mgu-container-max), 92%);
  margin-inline: auto;
}

.mgu-section {
  padding-block: clamp(48px, 8vw, 88px);
}

.mgu-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin-bottom: 28px;
}

.mgu-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(16px, 3vw, 32px);
}

.mgu-col-3 { grid-column: span 3; }
.mgu-col-4 { grid-column: span 4; }
.mgu-col-5 { grid-column: span 5; }
.mgu-col-6 { grid-column: span 6; }
.mgu-col-7 { grid-column: span 7; }
.mgu-col-8 { grid-column: span 8; }
.mgu-col-12 { grid-column: 1 / -1; }

@media (max-width: 959px) {
  .mgu-col-3,
  .mgu-col-4,
  .mgu-col-5,
  .mgu-col-6,
  .mgu-col-7,
  .mgu-col-8 { grid-column: span 6; }
}

@media (max-width: 639px) {
  .mgu-col-3,
  .mgu-col-4,
  .mgu-col-5,
  .mgu-col-6,
  .mgu-col-7,
  .mgu-col-8 { grid-column: 1 / -1; }
}

/* ---------- 5. 通用组件 ---------- */
.mgu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-family: var(--mgu-font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition:
    background var(--mgu-speed) var(--mgu-ease),
    color var(--mgu-speed) var(--mgu-ease),
    border-color var(--mgu-speed) var(--mgu-ease),
    box-shadow var(--mgu-speed) var(--mgu-ease);
}

.mgu-btn--primary {
  background: var(--mgu-red);
  color: var(--mgu-cream);
}

.mgu-btn--primary:hover {
  background: var(--mgu-red-deep);
  box-shadow: 0 4px 16px var(--mgu-glow);
}

.mgu-btn--secondary {
  background: var(--mgu-blue);
  color: var(--mgu-cream);
}

.mgu-btn--secondary:hover {
  background: var(--mgu-blue-bright);
}

.mgu-btn--ghost {
  border-color: var(--mgu-line-strong);
  color: var(--mgu-cream);
  background: transparent;
}

.mgu-btn--ghost:hover {
  border-color: var(--mgu-red);
  color: var(--mgu-red);
}

.mgu-card {
  background: var(--mgu-surface);
  border: 1px solid var(--mgu-line);
  border-radius: var(--mgu-radius);
  box-shadow: 0 4px 18px var(--mgu-shadow);
  overflow: hidden;
}

.mgu-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--mgu-line);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mgu-muted);
}

.mgu-pill--red {
  border-color: var(--mgu-red);
  color: var(--mgu-red);
}

.mgu-pill--blue {
  border-color: var(--mgu-blue);
  color: var(--mgu-blue-bright);
}

.mgu-pill--gold {
  border-color: var(--mgu-gold);
  color: var(--mgu-gold);
}

.mgu-stat {
  font-family: var(--mgu-font-display);
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1;
  color: var(--mgu-cream);
}

.mgu-stat__label {
  display: block;
  font-family: var(--mgu-font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mgu-muted);
  margin-top: 6px;
}

.mgu-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  border-bottom: 1px solid var(--mgu-line);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mgu-muted);
}

.mgu-breadcrumb a {
  color: var(--mgu-muted);
}

.mgu-breadcrumb a:hover {
  color: var(--mgu-cream);
}

.mgu-breadcrumb__sep {
  color: var(--mgu-blue);
  font-family: var(--mgu-font-mono);
  font-size: 10px;
}

.mgu-breadcrumb [aria-current="page"] {
  color: var(--mgu-cream);
}

.mgu-legend {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 12px 16px;
  border: 1px solid var(--mgu-line);
  border-radius: 4px;
  background: rgba(244, 233, 216, 0.03);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mgu-muted);
}

.mgu-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.mgu-legend__swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.mgu-legend__swatch--red { background: var(--mgu-red); }
.mgu-legend__swatch--blue { background: var(--mgu-blue); }
.mgu-legend__swatch--gold { background: var(--mgu-gold); }

.mgu-table-shell {
  overflow-x: auto;
}

.mgu-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.mgu-table th,
.mgu-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--mgu-line);
  text-align: left;
}

.mgu-table th {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mgu-muted);
}

.mgu-table tbody tr:hover {
  background: rgba(244, 233, 216, 0.03);
}

/* 图片容器 */
.mgu-media {
  position: relative;
  overflow: hidden;
  background: var(--mgu-surface-2);
}

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

.mgu-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, transparent 55%, rgba(232, 83, 46, 0.18));
  pointer-events: none;
}

/* 滚动显现 */
.js-enabled .mgu-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.55s var(--mgu-ease),
    transform 0.55s var(--mgu-ease);
  transition-delay: var(--mgu-reveal-delay, 0ms);
}

.js-enabled .mgu-reveal.is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 6. 通用工具 ---------- */
.mgu-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mgu-skip-link {
  position: fixed;
  top: -64px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background: var(--mgu-red);
  color: #fff;
  padding: 10px 22px;
  border-radius: 0 0 8px 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: top var(--mgu-speed) var(--mgu-ease);
}

.mgu-skip-link:focus-visible {
  top: 0;
}

/* ---------- 7. 页头 ---------- */
.mgu-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 13, 11, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-top: 3px solid var(--mgu-red);
  transition: box-shadow var(--mgu-speed) var(--mgu-ease), background-color var(--mgu-speed) var(--mgu-ease);
}

.mgu-header.is-scrolled {
  background: rgba(14, 13, 11, 0.96);
  box-shadow: 0 10px 30px var(--mgu-shadow);
}

.mgu-scroll-progress {
  position: absolute;
  top: 3px;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--mgu-red), var(--mgu-gold));
  z-index: 5;
  pointer-events: none;
}

.mgu-header__topbar {
  position: relative;
  border-bottom: 1px solid var(--mgu-line);
  background-image:
    linear-gradient(var(--mgu-line-weak) 1px, transparent 1px),
    linear-gradient(90deg, var(--mgu-line-weak) 1px, transparent 1px);
  background-size: 32px 32px;
}

.mgu-header__frame {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  padding-inline: 16px;
  border-inline: 1px solid var(--mgu-line);
}

.mgu-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.mgu-brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--mgu-red), var(--mgu-red-deep));
  color: var(--mgu-cream);
  font-family: var(--mgu-font-display);
  font-weight: 700;
  font-size: 24px;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
  box-shadow: 0 4px 12px var(--mgu-glow);
  flex-shrink: 0;
}

.mgu-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.mgu-brand__text strong {
  font-family: var(--mgu-font-display);
  font-size: 21px;
  letter-spacing: 0.04em;
  color: var(--mgu-cream);
}

.mgu-brand__text small {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--mgu-muted);
  white-space: nowrap;
}

.mgu-header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mgu-header__coords {
  font-family: var(--mgu-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mgu-blue);
  white-space: nowrap;
}

.mgu-version {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border: 1px solid var(--mgu-red);
  border-radius: 999px;
  background: rgba(232, 83, 46, 0.1);
  color: var(--mgu-cream);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition:
    background var(--mgu-speed) var(--mgu-ease),
    border-color var(--mgu-speed) var(--mgu-ease),
    box-shadow var(--mgu-speed) var(--mgu-ease);
}

.mgu-version:hover {
  background: rgba(232, 83, 46, 0.2);
  box-shadow: 0 0 0 3px var(--mgu-glow);
}

.mgu-version[aria-pressed="true"] {
  border-color: var(--mgu-gold);
  background: rgba(212, 166, 79, 0.12);
}

.mgu-version__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mgu-red);
  box-shadow: 0 0 8px var(--mgu-red);
}

/* ---------- 8. 导航 ---------- */
.mgu-nav {
  position: relative;
  border-bottom: 1px solid var(--mgu-line);
  background: rgba(14, 13, 11, 0.92);
}

.mgu-nav__inner {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding-inline: 16px;
  border-inline: 1px solid var(--mgu-line);
}

.mgu-nav__inner::before {
  content: 'NAV / INDEX 01–06';
  font-family: var(--mgu-font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--mgu-blue);
  white-space: nowrap;
}

.mgu-nav__inner::after {
  content: 'FIELD / LIVE';
  margin-left: auto;
  font-family: var(--mgu-font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--mgu-muted);
  white-space: nowrap;
  opacity: 0.7;
}

.mgu-nav__toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  color: var(--mgu-cream);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.mgu-nav__toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 20px;
}

.mgu-nav__toggle-line {
  height: 2px;
  width: 100%;
  background: var(--mgu-cream);
  transition: transform var(--mgu-speed) var(--mgu-ease), opacity var(--mgu-speed) var(--mgu-ease);
}

.mgu-nav__toggle-line:nth-child(2) {
  width: 70%;
}

.mgu-nav[data-open] .mgu-nav__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mgu-nav[data-open] .mgu-nav__toggle-line:nth-child(2) {
  opacity: 0;
}

.mgu-nav[data-open] .mgu-nav__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mgu-nav__list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 120;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  background: rgba(18, 16, 14, 0.98);
  box-shadow: 0 24px 40px var(--mgu-shadow);
  transition:
    max-height 0.4s var(--mgu-ease),
    opacity 0.3s ease,
    visibility 0s linear 0.4s;
}

.mgu-nav[data-open] .mgu-nav__list {
  max-height: min(480px, 90vh);
  overflow-y: auto;
  opacity: 1;
  visibility: visible;
  transition:
    max-height 0.4s var(--mgu-ease),
    opacity 0.35s ease;
}

.mgu-nav__list::after {
  content: '';
  display: block;
  height: 3px;
  flex-shrink: 0;
  background: linear-gradient(90deg, var(--mgu-red), transparent);
}

.mgu-nav__item {
  border-bottom: 1px solid var(--mgu-line);
}

.mgu-nav__item:last-child {
  border-bottom: none;
}

.mgu-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 15px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--mgu-muted);
  transition: color var(--mgu-speed) var(--mgu-ease), background var(--mgu-speed) var(--mgu-ease);
}

.mgu-nav__link:hover {
  color: var(--mgu-cream);
  background: rgba(244, 233, 216, 0.05);
}

.mgu-nav__num {
  font-family: var(--mgu-font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--mgu-blue);
  transition: color var(--mgu-speed) var(--mgu-ease);
}

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

.mgu-nav__link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: -1px;
  height: 3px;
  background: var(--mgu-red);
  clip-path: polygon(0 0, 100% 0, 96% 100%, 4% 100%);
}

.mgu-nav__link[aria-current="page"] .mgu-nav__num {
  color: var(--mgu-red);
}

/* ---------- 9. 页脚 ---------- */
.mgu-footer {
  margin-top: auto;
  background:
    linear-gradient(var(--mgu-line-weak) 1px, transparent 1px),
    linear-gradient(90deg, var(--mgu-line-weak) 1px, transparent 1px),
    var(--mgu-surface);
  background-size: 32px 32px;
  border-top: 3px solid var(--mgu-red);
}

.mgu-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 0.9fr 1.2fr;
  gap: clamp(28px, 5vw, 48px);
  padding-block: 56px 44px;
}

.mgu-footer__brand-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.mgu-footer__brand .mgu-brand__mark {
  width: 48px;
  height: 48px;
  font-size: 26px;
}

.mgu-footer__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.mgu-footer__brand-text strong {
  font-family: var(--mgu-font-display);
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--mgu-cream);
}

.mgu-footer__brand-text small {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--mgu-muted);
}

.mgu-footer__slogan {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mgu-cream);
}

.mgu-footer__trust {
  font-size: 12px;
  line-height: 1.7;
  color: var(--mgu-muted);
}

.mgu-footer__heading {
  position: relative;
  padding-bottom: 10px;
  margin-bottom: 14px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--mgu-cream);
  border-bottom: 1px solid var(--mgu-line);
}

.mgu-footer__heading::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 28px;
  height: 2px;
  background: var(--mgu-red);
}

.mgu-footer__list a {
  display: inline-block;
  padding: 4px 0;
  color: var(--mgu-muted);
  font-size: 14px;
  transition: color var(--mgu-speed) var(--mgu-ease), transform var(--mgu-speed) var(--mgu-ease);
}

.mgu-footer__list a:hover {
  color: var(--mgu-cream);
  transform: translateX(4px);
}

.mgu-footer__contact-list {
  font-style: normal;
}

.mgu-footer__contact-list li {
  padding: 4px 0;
  color: var(--mgu-muted);
  font-size: 14px;
  line-height: 1.7;
}

.mgu-footer__contact-list li:first-child {
  font-family: var(--mgu-font-display);
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--mgu-gold);
}

.mgu-footer__note {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mgu-muted);
}

.mgu-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-block: 18px 24px;
  border-top: 1px solid var(--mgu-line);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mgu-muted);
}

.mgu-footer__coords {
  font-family: var(--mgu-font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--mgu-blue);
}

/* ---------- 10. 断点响应 ---------- */
@media (max-width: 959px) {
  .mgu-nav__inner::before,
  .mgu-nav__inner::after {
    display: none;
  }

  .mgu-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .mgu-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .mgu-nav__toggle {
    display: none;
  }

  .mgu-nav__inner::before,
  .mgu-nav__inner::after {
    display: inline-block;
  }

  .mgu-nav__list,
  .mgu-nav[data-open] .mgu-nav__list {
    position: static;
    flex-direction: row;
    align-items: stretch;
    max-height: none;
    overflow: visible;
    opacity: 1;
    visibility: visible;
    background: transparent;
    box-shadow: none;
    margin-inline: 24px auto;
  }

  .mgu-nav__list::after {
    display: none;
  }

  .mgu-nav__item {
    border-bottom: none;
  }

  .mgu-nav__link,
  .mgu-nav__link[aria-current="page"] {
    height: 52px;
    padding: 0 18px;
    font-size: 15px;
  }

  .mgu-nav__link[aria-current="page"]::after {
    left: 18px;
    right: 18px;
  }
}

@media (max-width: 639px) {
  .mgu-header__coords {
    display: none;
  }

  .mgu-brand__text small {
    display: none;
  }

  .mgu-footer__grid {
    grid-template-columns: 1fr;
  }

  .mgu-footer__brand {
    grid-column: auto;
  }
}

@media (max-width: 479px) {
  .mgu-version {
    padding: 6px 12px;
    font-size: 12px;
  }

  .mgu-brand__mark {
    width: 40px;
    height: 40px;
    font-size: 22px;
  }

  .mgu-header__frame {
    min-height: 58px;
    padding-inline: 12px;
  }

  .mgu-nav__inner {
    padding-inline: 12px;
  }
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js-enabled .mgu-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .mgu-skip-link {
    transition: none;
  }
}