/* 导航样式已统一到 assets/site-header.css（全站共用）。本文件此前保留了
   第三份副本，其中 .nav-links{margin-left:0} 会覆盖共享样式，导致 mt4/mt5
   的菜单比其它页面左移 8px。2026-08-20 移除。 */
/*
 * MT4 / MT5 alignment layer.
 * Loaded last so the legacy page CSS cannot override the homepage header.
 */
header {
  position: sticky;
  top: 18px;
  z-index: 50;
  background: transparent;
  pointer-events: none;
}

@keyframes mt-nav-shine {
  0% { transform: translateX(-160%); }
  20%, 100% { transform: translateX(160%); }
}

/* Same visible banner geometry as the canonical inner pages. */
.blank-hero {
  min-height: 667px;
  margin-top: -86px;
  background-position: center top;
  background-size: cover;
}@media (max-width: 900px) {
  header {
    top: 12px;
  }

  .blank-hero {
    min-height: 612px;
    margin-top: -76px;
  }} 覆盖（同优先级、后加载者胜）。 */
@media (max-width: 1280px) {

  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  nav.menu-open .menu-toggle span {
    position: relative;
    height: 0;
    box-shadow: none;
  }

  nav.menu-open .menu-toggle span::before,
  nav.menu-open .menu-toggle span::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 21px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transform-origin: center;
  }

  nav.menu-open .menu-toggle span::before {
    transform: translate(-50%, -50%) rotate(45deg);
  }

  nav.menu-open .menu-toggle span::after {
    transform: translate(-50%, -50%) rotate(-45deg);
  }

  .mobile-menu-panel {
    position: absolute;
    top: calc(100% + 14px);
    right: 10px;
    left: 10px;
    max-height: calc(100vh - 106px);
    padding: 26px 22px 28px;
    display: block;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 24px;
    background: rgba(4, 12, 30, .96);
    box-shadow: 0 26px 70px rgba(0, 0, 0, .48), inset 0 1px 0 rgba(255, 255, 255, .06);
    backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: .22s ease;
  }

  nav.menu-open .mobile-menu-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .mobile-menu-main {
    display: grid;
    gap: 0;
  }

  .mobile-menu-main > a,
  .mobile-menu-main summary {
    min-height: 50px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    color: #dbe6f7;
    font-family: "Microsoft YaHei", "PingFang SC", "Source Han Sans SC", sans-serif;
    font-size: 18px;
    letter-spacing: 0;
    cursor: pointer;
    list-style: none;
  }

  .mobile-menu-main summary::-webkit-details-marker {
    display: none;
  }

  .mobile-menu-main summary::after {
    content: "";
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    opacity: .65;
    transform: rotate(45deg);
    transition: .2s;
  }

  .mobile-submenu[open] summary::after {
    transform: rotate(225deg);
  }

  .mobile-submenu-links {
    padding: 12px 0 14px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
  }

  .mobile-submenu-links a {
    min-height: 0;
    padding: 7px 0;
    display: block;
    border: 0;
    color: #a8c2e4;
    font-size: 14.5px;
    line-height: 1.35;
  }

  .mobile-menu-meta {
    margin-top: 22px;
    padding-top: 22px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    border-top: 1px solid rgba(255, 255, 255, .08);
  }

  .mobile-menu-col h4 {
    margin: 0 0 14px;
    color: #697184;
    font-family: "General Sans", -apple-system, "Segoe UI", sans-serif;
    font-size: 13px;
    letter-spacing: .32em;
    text-transform: uppercase;
  }

  .mobile-menu-col button {
    width: 100%;
    padding: 4px 0;
    display: block;
    border: 0;
    color: #a8b1c2;
    background: transparent;
    text-align: left;
    font: inherit;
    font-size: 15px;
    line-height: 1.7;
    cursor: pointer;
  }

  .mobile-lang-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 20px;
  }

  .mobile-menu-actions {
    display: none;
  }
}@media (max-width: 560px) {
  header {
    top: 8px;
  }

  .mobile-menu-main > a,
  .mobile-menu-main summary {
    min-height: 48px;
    font-size: 17px;
  }

  .mobile-menu-meta {
    gap: 20px;
  }

  .blank-hero {
    min-height: 510px;
    margin-top: -76px;
  }}