/* ============================================================
   迈博体育 · 共享样式表  /assets/site.css
   夜战深蓝底 + 粗边框硬阴影 + 等宽数字的指挥室视觉
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
img, svg, video { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --mb-night: #071320;
  --mb-night-2: #0A1826;
  --mb-panel: #0F2135;
  --mb-line: #1E3A55;
  --mb-lime: #B6FF3C;
  --mb-orange: #FF7A1A;
  --mb-cyan: #35E0C8;
  --mb-ink: #F2F6EF;
  --mb-mist: #A9BED2;
  --mb-violet: #7A5CFF;
  --mb-sand: #E8E2D4;
  --mb-shadow: #030B13;
  --mb-head: 84px;
  --mb-shell: 1240px;
  --mb-gutter: clamp(18px, 4vw, 32px);
  --mb-ease: cubic-bezier(.2, .7, .3, 1);
  --mb-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mb-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

@media (max-width: 980px) {
  :root { --mb-head: 68px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--mb-night);
  background-image:
    linear-gradient(rgba(30, 58, 85, .26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 85, .26) 1px, transparent 1px);
  background-size: 88px 88px;
  color: var(--mb-ink);
  font-family: var(--mb-font);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--mb-lime); color: #06200a; }

:focus-visible {
  outline: 3px solid var(--mb-cyan);
  outline-offset: 3px;
}

#main-content { outline: none; scroll-margin-top: calc(var(--mb-head) + 10px); }

.mb-h1, .mb-h2, .mb-h3 {
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.02em;
  text-wrap: balance;
}
.mb-h1 { font-size: clamp(2.6rem, 6vw, 5rem); }
.mb-h2 { font-size: clamp(1.6rem, 3vw, 2.6rem); }
.mb-h3 { font-size: clamp(1.15rem, 1.8vw, 1.5rem); letter-spacing: -.01em; }

.mb-lede {
  max-width: 64ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--mb-mist);
}

.mb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mb-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mb-cyan);
}
.mb-eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--mb-lime);
}

.mb-link {
  color: var(--mb-cyan);
  border-bottom: 2px solid rgba(53, 224, 200, .4);
  transition: color .16s var(--mb-ease), border-color .16s var(--mb-ease);
}
.mb-link:hover { color: var(--mb-lime); border-bottom-color: var(--mb-lime); }

.mb-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;
}

/* ---------- 4. 跳转链接与滚动进度 ---------- */
.mb-skip {
  position: fixed;
  top: -140px;
  left: 16px;
  z-index: 130;
  display: inline-block;
  padding: 12px 18px;
  background: var(--mb-lime);
  color: #06180a;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .04em;
  border: 2px solid var(--mb-night);
  box-shadow: 4px 4px 0 var(--mb-shadow);
  transition: top .16s var(--mb-ease);
}
.mb-skip:focus { top: 12px; }

.mb-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 125;
  background: transparent;
  pointer-events: none;
}
.mb-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--mb-cyan), var(--mb-lime));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 5. 头部 ---------- */
.mb-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  min-height: var(--mb-head);
  background: transparent;
  border-bottom: 2px solid transparent;
  transition: background-color .22s var(--mb-ease), border-color .22s var(--mb-ease);
}
.mb-header.is-stuck {
  background: rgba(7, 19, 32, .95);
  border-bottom-color: var(--mb-line);
  backdrop-filter: blur(10px);
}

.mb-header__inner {
  width: min(var(--mb-shell), 100% - var(--mb-gutter) * 2);
  margin-inline: auto;
  min-height: var(--mb-head);
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
}

.mb-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.mb-brand__mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  background: var(--mb-lime);
  color: #06180a;
  border: 2px solid var(--mb-night);
  box-shadow: 3px 3px 0 var(--mb-shadow);
}
.mb-brand__mark svg { width: 22px; height: 22px; }
.mb-brand__text { display: grid; gap: 1px; min-width: 0; }
.mb-brand__name {
  display: block;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: .02em;
  line-height: 1.15;
  color: var(--mb-ink);
}
.mb-brand__line {
  display: block;
  font-family: var(--mb-mono);
  font-size: 11px;
  letter-spacing: .04em;
  line-height: 1.4;
  color: var(--mb-mist);
}

.mb-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.mb-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 1vw, 8px);
  flex-wrap: nowrap;
  min-width: 0;
}
.mb-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 12px 14px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1;
  color: var(--mb-mist);
  white-space: nowrap;
  transition: color .16s var(--mb-ease), background-color .16s var(--mb-ease);
}
.mb-nav__link::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 6px;
  height: 3px;
  background: var(--mb-lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s var(--mb-ease);
}
.mb-nav__link:hover { color: var(--mb-ink); }
.mb-nav__link:hover::after { transform: scaleX(.42); }
.mb-nav__link[aria-current="page"] { color: var(--mb-lime); }
.mb-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.mb-nav__num {
  font-family: var(--mb-mono);
  font-size: 11px;
  letter-spacing: 0;
  color: var(--mb-violet);
}
.mb-nav__link[aria-current="page"] .mb-nav__num { color: var(--mb-lime); }

.mb-nav__actions { display: none; }

.mb-header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}
.mb-util {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--mb-mist);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .16s var(--mb-ease), border-color .16s var(--mb-ease);
}
.mb-util:hover { color: var(--mb-cyan); border-bottom-color: var(--mb-cyan); }

.mb-nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  background: var(--mb-panel);
  border: 2px solid var(--mb-line);
  color: var(--mb-ink);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  box-shadow: 3px 3px 0 var(--mb-shadow);
  cursor: pointer;
  transition: transform .14s var(--mb-ease), box-shadow .14s var(--mb-ease), border-color .14s var(--mb-ease), color .14s var(--mb-ease);
}
.mb-nav-toggle:hover { border-color: var(--mb-lime); }
.mb-nav-toggle:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--mb-shadow); }
.mb-nav-toggle__label { line-height: 1; }
.mb-nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 14px;
}
.mb-nav-toggle__bars span {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: currentColor;
  transition: transform .18s var(--mb-ease), opacity .18s var(--mb-ease);
}
.mb-nav-toggle__bars span:nth-child(1) { top: 0; }
.mb-nav-toggle__bars span:nth-child(2) { top: 6px; }
.mb-nav-toggle__bars span:nth-child(3) { top: 12px; }
.mb-header[data-open] .mb-nav-toggle { border-color: var(--mb-lime); color: var(--mb-lime); }
.mb-header[data-open] .mb-nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mb-header[data-open] .mb-nav-toggle__bars span:nth-child(2) { opacity: 0; }
.mb-header[data-open] .mb-nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 6. 按钮 ---------- */
.mb-btn {
  --btn-bg: var(--mb-lime);
  --btn-fg: #06180a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .85em 1.25em;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .03em;
  line-height: 1;
  border: 2px solid var(--mb-night);
  box-shadow: 4px 4px 0 var(--mb-shadow);
  cursor: pointer;
  transition: transform .14s var(--mb-ease), box-shadow .14s var(--mb-ease), background-color .14s var(--mb-ease), border-color .14s var(--mb-ease), color .14s var(--mb-ease);
}
.mb-btn:hover { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--mb-shadow); }
.mb-btn:active { transform: translate(4px, 4px); box-shadow: 0 0 0 var(--mb-shadow); }
.mb-btn--lime { --btn-bg: var(--mb-lime); --btn-fg: #06180a; }
.mb-btn--cyan { --btn-bg: var(--mb-cyan); --btn-fg: #04222b; }
.mb-btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--mb-ink);
  border-color: var(--mb-line);
}
.mb-btn--ghost:hover { border-color: var(--mb-lime); color: var(--mb-lime); }
.mb-btn--compact { padding: .7em 1em; font-size: 14px; }

/* ---------- 7. 主内容骨架 ---------- */
.mb-main {
  padding-top: var(--mb-head);
  min-height: 60vh;
}
.mb-main--flush { padding-top: 0; }

.mb-shell {
  width: min(var(--mb-shell), 100% - var(--mb-gutter) * 2);
  margin-inline: auto;
}

.mb-section { padding-block: clamp(46px, 7vw, 96px); }
.mb-section--tight { padding-block: clamp(26px, 4vw, 52px); }
.mb-section--panel {
  background: var(--mb-panel);
  border-block: 2px solid var(--mb-line);
}
.mb-section--sand {
  background: var(--mb-sand);
  color: var(--mb-night);
  border-block: 3px solid var(--mb-night);
}
.mb-section--sand .mb-lede,
.mb-section--sand .mb-index__desc,
.mb-section--sand .mb-footer__tagline { color: #3C556B; }
.mb-section--sand .mb-eyebrow { color: #0F6E63; }
.mb-section--sand .mb-eyebrow::before { background: var(--mb-orange); }
.mb-section--sand .mb-index__link,
.mb-section--sand .mb-panel {
  background: #FBF8F1;
  border-color: var(--mb-night);
  color: var(--mb-night);
}
.mb-section--sand .mb-index__title,
.mb-section--sand .mb-panel__title { color: var(--mb-night); }
.mb-section--sand .mb-index__kicker { color: #5A3FE0; }

.mb-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  font-family: var(--mb-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mb-mist);
}
.mb-crumbs a:hover { color: var(--mb-cyan); }
.mb-crumbs__sep { color: var(--mb-line); }
.mb-crumbs [aria-current="page"] { color: var(--mb-lime); }

.mb-grid { display: grid; gap: clamp(14px, 2vw, 22px); }
.mb-grid > * { min-width: 0; }
.mb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.mb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mb-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.mb-stack > * + * { margin-top: var(--stack, 16px); }

/* ---------- 8. 可复用块面 ---------- */
.mb-index {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
}
.mb-index__link {
  display: grid;
  gap: 10px;
  align-content: start;
  height: 100%;
  padding: 20px 20px 22px;
  background: var(--mb-panel);
  border: 2px solid var(--mb-line);
  box-shadow: 6px 6px 0 var(--mb-shadow);
  transition: transform .16s var(--mb-ease), box-shadow .16s var(--mb-ease), border-color .16s var(--mb-ease);
}
.mb-index__link:hover {
  transform: translate(3px, 3px);
  box-shadow: 3px 3px 0 var(--mb-shadow);
  border-color: var(--mb-lime);
}
.mb-index__kicker {
  font-family: var(--mb-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mb-violet);
}
.mb-index__title {
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.3;
  color: var(--mb-ink);
}
.mb-index__desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--mb-mist);
}
.mb-index__go {
  font-family: var(--mb-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mb-cyan);
}

.mb-panel {
  background: var(--mb-panel);
  border: 2px solid var(--mb-line);
  box-shadow: 6px 6px 0 var(--mb-shadow);
  padding: clamp(16px, 2.2vw, 24px);
}
.mb-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--mb-line);
}
.mb-panel__title {
  font-size: 16px;
  font-weight: 900;
  letter-spacing: .02em;
}

.mb-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  font-family: var(--mb-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1.5;
  color: var(--mb-cyan);
  border: 1px solid currentColor;
}
.mb-badge--lime { color: var(--mb-lime); }
.mb-badge--orange { color: var(--mb-orange); }
.mb-badge--violet { color: var(--mb-violet); }

.mb-num {
  font-family: var(--mb-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -.02em;
}

.mb-stat {
  display: grid;
  gap: 3px;
  padding: 12px 16px;
  border-left: 4px solid var(--mb-line);
}
.mb-stat--lime { border-left-color: var(--mb-lime); }
.mb-stat--orange { border-left-color: var(--mb-orange); }
.mb-stat--cyan { border-left-color: var(--mb-cyan); }
.mb-stat__value {
  font-family: var(--mb-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.05;
  color: var(--mb-ink);
}
.mb-stat__label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mb-mist);
}

/* ---------- 9. 分段切换 ---------- */
.mb-tabs { display: block; }
.mb-tabs__list {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  border-bottom: 3px solid var(--mb-line);
  scrollbar-width: thin;
}
.mb-tabs__tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  margin-bottom: -3px;
  padding: 13px 18px;
  font-family: var(--mb-font);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--mb-mist);
  white-space: nowrap;
  cursor: pointer;
  transition: color .16s var(--mb-ease), border-color .16s var(--mb-ease), background-color .16s var(--mb-ease);
}
.mb-tabs__tab:hover { color: var(--mb-ink); background: rgba(30, 58, 85, .38); }
.mb-tabs__tab[aria-selected="true"] {
  color: var(--mb-lime);
  border-bottom-color: var(--mb-lime);
  background: rgba(30, 58, 85, .5);
}
.mb-tabs__panel { padding-top: clamp(18px, 2.5vw, 28px); }
.mb-tabs__panel[hidden] { display: none; }
.mb-tabs__panel.is-active { animation: mb-fade .18s var(--mb-ease); }
@keyframes mb-fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 10. 图文容器（页面阶段放置占位图） ---------- */
.mb-media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--mb-panel);
  border: 2px solid var(--mb-line);
  box-shadow: 6px 6px 0 var(--mb-shadow);
}
.mb-media > img,
.mb-media > svg,
.mb-media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.mb-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(rgba(53, 224, 200, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 224, 200, .12) 1px, transparent 1px);
  background-size: 44px 44px;
}
.mb-media--clean::after { display: none; }
.mb-media--wide { aspect-ratio: 16 / 9; }
.mb-media--standard { aspect-ratio: 4 / 3; }
.mb-media--square { aspect-ratio: 1 / 1; }
.mb-media--tall { aspect-ratio: 3 / 4; }
.mb-media--banner { aspect-ratio: 21 / 9; }
.mb-media--sliced {
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
  box-shadow: none;
}
.mb-media__cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 10px 14px;
  background: rgba(7, 19, 32, .88);
  border-top: 2px solid var(--mb-line);
  font-family: var(--mb-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mb-mist);
}

/* ---------- 11. 页脚 ---------- */
.mb-footer {
  position: relative;
  margin-top: clamp(54px, 8vw, 108px);
  background: var(--mb-night-2);
  border-top: 3px solid var(--mb-line);
}
.mb-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .7;
  background-image: repeating-linear-gradient(90deg, rgba(30, 58, 85, .55) 0 2px, transparent 2px 132px);
}
.mb-footer__inner {
  position: relative;
  width: min(var(--mb-shell), 100% - var(--mb-gutter) * 2);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) 0 24px;
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}
.mb-footer__top {
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
}
.mb-footer__brand .mb-brand__name { font-size: 26px; }
.mb-footer__tagline {
  margin-top: 14px;
  max-width: 34ch;
  font-family: var(--mb-mono);
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: .02em;
  color: var(--mb-mist);
}
.mb-footer__stamp {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.mb-footer__cols {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.mb-footer__coltitle {
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--mb-line);
  font-family: var(--mb-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mb-violet);
}
.mb-footer__list { display: grid; gap: 6px; }
.mb-footer__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-size: 15px;
  color: var(--mb-mist);
  transition: color .16s var(--mb-ease), transform .16s var(--mb-ease);
}
.mb-footer__list a::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--mb-line);
  transition: background-color .16s var(--mb-ease);
}
.mb-footer__list a:hover { color: var(--mb-lime); transform: translateX(3px); }
.mb-footer__list a:hover::before { background: var(--mb-lime); }

.mb-contact {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: var(--mb-panel);
  border: 2px solid var(--mb-line);
  box-shadow: 6px 6px 0 var(--mb-shadow);
}
.mb-contact__row {
  padding: 18px 20px;
  border-right: 2px solid var(--mb-line);
  min-width: 0;
}
.mb-contact__row:last-child { border-right: 0; }
.mb-contact__label {
  margin-bottom: 6px;
  font-family: var(--mb-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mb-violet);
}
.mb-contact__value {
  font-size: 14px;
  line-height: 1.68;
  color: var(--mb-ink);
  overflow-wrap: anywhere;
}
.mb-contact__value strong {
  font-family: var(--mb-mono);
  font-variant-numeric: tabular-nums;
  font-size: 17px;
  font-weight: 700;
  color: var(--mb-lime);
}

.mb-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 20px;
  border-top: 2px solid var(--mb-line);
  font-family: var(--mb-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mb-mist);
}
.mb-footer__legal { color: var(--mb-ink); }
.mb-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
}
.mb-footer__sep { color: var(--mb-orange); }

.mb-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 55;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--mb-panel);
  color: var(--mb-ink);
  border: 2px solid var(--mb-line);
  box-shadow: 4px 4px 0 var(--mb-shadow);
  font-family: var(--mb-mono);
  font-size: 12px;
  letter-spacing: .1em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .2s var(--mb-ease), transform .2s var(--mb-ease), visibility .2s linear, border-color .16s var(--mb-ease), color .16s var(--mb-ease);
}
.mb-top.is-on { opacity: 1; visibility: visible; transform: none; }
.mb-top:hover { border-color: var(--mb-lime); color: var(--mb-lime); }

/* ---------- 12. 显现动效 ---------- */
[data-reveal] {
  transition: opacity .55s var(--mb-ease), transform .55s var(--mb-ease);
}
html.mb-js [data-reveal]:not(.is-in) {
  opacity: 0;
  transform: translateY(14px);
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1180px) {
  .mb-nav__num { display: none; }
  .mb-nav__link { padding-inline: 9px; font-size: 14px; }
}

@media (max-width: 1024px) {
  .mb-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mb-footer__top { grid-template-columns: 1fr; }
}

@media (max-width: 1000px) {
  .mb-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mb-contact__row:nth-child(2n) { border-right: 0; }
  .mb-contact__row:nth-child(n+3) { border-top: 2px solid var(--mb-line); }
}

@media (max-width: 980px) {
  .mb-nav-toggle { display: inline-flex; }
  .mb-header__actions { display: none; }

  .mb-nav {
    position: fixed;
    top: var(--mb-head);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    justify-content: flex-start;
    padding: 18px var(--mb-gutter) 28px;
    background: var(--mb-night-2);
    border-bottom: 3px solid var(--mb-lime);
    box-shadow: 0 16px 0 rgba(3, 11, 19, .55);
    max-height: calc(100dvh - var(--mb-head));
    overflow-y: auto;
  }
  .mb-header[data-open] .mb-nav { display: flex; }

  .mb-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .mb-nav__link {
    padding: 15px 6px;
    font-size: 17px;
    color: var(--mb-ink);
    border-bottom: 2px solid var(--mb-line);
  }
  .mb-nav__link::after { display: none; }
  .mb-nav__link:hover { background: rgba(30, 58, 85, .35); }
  .mb-nav__link[aria-current="page"] {
    color: var(--mb-lime);
    border-bottom-color: var(--mb-line);
    box-shadow: inset 4px 0 0 var(--mb-lime);
    padding-left: 14px;
  }
  .mb-nav__num { display: inline; }

  .mb-nav__actions {
    display: grid;
    gap: 10px;
    margin-top: 22px;
  }
  .mb-nav__actions .mb-btn { width: 100%; }
}

@media (max-width: 820px) {
  body { font-size: 16px; }
  .mb-grid--2,
  .mb-grid--3,
  .mb-grid--4 { grid-template-columns: 1fr; }
  .mb-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mb-brand__line { display: none; }
  .mb-footer__brand .mb-brand__line { display: block; }
}

@media (max-width: 600px) {
  .mb-contact { grid-template-columns: 1fr; }
  .mb-contact__row { border-right: 0; border-top: 2px solid var(--mb-line); }
  .mb-contact__row:first-child { border-top: 0; }
  .mb-footer__cols { grid-template-columns: 1fr; }
  .mb-footer__bottom { flex-direction: column; align-items: flex-start; }
  .mb-brand__mark { width: 34px; height: 34px; }
  .mb-brand__mark svg { width: 18px; height: 18px; }
  .mb-brand__name { font-size: 17px; }
}

/* ---------- 14. 减动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.mb-js [data-reveal]:not(.is-in) {
    opacity: 1;
    transform: none;
  }
  .mb-btn:hover,
  .mb-index__link:hover,
  .mb-nav-toggle:active { transform: none; }
  .mb-tabs__panel.is-active { animation: none; }
}