/**
 * Header block styles — extracted from style-index-ext.css
 */

@layer mm-block {
  /* ── Sticky header: ensure all parent containers allow sticky behaviour ── */
  .modern-machinery-header-part,
  .modern-machinery-header-part > .wp-block-group,
  .wp-site-blocks,
  .wp-block-template-part {
    overflow: visible;
  }

  .mm-x-site-header {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.94);
    border-bottom: 1px solid rgba(15,23,42,.08);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    will-change: transform;
  }

  .mm-x-top-strip {
    background: var(--mmx-dark);
    color: #cfd4dc;
    font-size: 13px;
  }

  .mm-x-top-strip .mm-x-wrap {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    padding: 8px 0;
  }

  .mm-x-nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 76px;
  }

  .mm-x-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 220px;
    font-weight: 900;
  }

  .mm-x-brand img {
    width: 76px;
    height: 42px;
    object-fit: contain;
  }

  .mm-x-brand small {
    display: block;
    color: var(--mmx-muted);
    font-size: 11px;
    font-weight: 700;
  }

  .mm-x-nav-tools {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .mm-x-lang {
    color: var(--mmx-muted);
    font-size: 13px;
    white-space: nowrap;
  }

  .mm-x-lang-switch {
    position: relative;
  }

  .mm-x-lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 38px;
    padding: 0 10px;
    border: 1px solid var(--mmx-line);
    border-radius: 4px;
    background: #fff;
    color: #303641;
    font-size: 13px;
    font-weight: 800;
    white-space: nowrap;
    cursor: pointer;
    transition: border-color .18s ease, color .18s ease;
  }

  .mm-x-lang-btn:hover {
    border-color: #b9c2cd;
  }

  .mm-x-lang-globe { color: var(--mmx-muted); }

  .mm-x-lang-caret { transition: transform .18s ease; }

  .mm-x-lang-switch.mm-x-open .mm-x-lang-caret { transform: rotate(180deg); }

  .mm-x-lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 80;
    min-width: 170px;
    margin: 0;
    padding: 6px;
    list-style: none;
    background: #fff;
    border: 1px solid var(--mmx-line);
    border-radius: 8px;
    box-shadow: 0 18px 40px rgba(15, 23, 42, .16);
    opacity: 0;
    transform: translateY(-6px);
    visibility: hidden;
    pointer-events: none;
    /* 收起时 visibility 延迟到淡出结束;展开时立即可见(下方 delay 归零) */
    transition: opacity .16s ease, transform .16s ease, visibility 0s linear .16s;
  }

  .mm-x-lang-switch.mm-x-open .mm-x-lang-menu {
    opacity: 1;
    transform: none;
    visibility: visible;
    pointer-events: auto;
    transition-delay: 0s;
  }

  .mm-x-lang-menu button {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 8px 10px;
    border: 0;
    border-radius: 5px;
    background: none;
    color: #2b3037;
    font-size: 13px;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
  }

  .mm-x-lang-menu button:hover {
    background: var(--mmx-soft);
  }

  .mm-x-lang-short {
    display: inline-grid;
    place-items: center;
    min-width: 28px;
    height: 20px;
    border-radius: 4px;
    background: var(--mmx-soft);
    color: var(--mmx-muted);
    font-size: 10px;
    font-weight: 900;
    letter-spacing: .04em;
  }

  .mm-x-lang-menu button.mm-x-active {
    color: var(--mmx-red);
  }

  .mm-x-lang-menu button.mm-x-active .mm-x-lang-short {
    background: rgba(215, 25, 32, .1);
    color: var(--mmx-red);
  }

  .mm-x-lang-menu button.mm-x-active::after {
    content: "✓";
    margin-left: auto;
    font-weight: 900;
  }

  .home .mm-x-lang-menu button.mm-x-active { color: var(--mmx-orange-dark); }

  .home .mm-x-lang-menu button.mm-x-active .mm-x-lang-short {
    background: rgba(244, 123, 32, .12);
    color: var(--mmx-orange-dark);
  }

  .mm-x-nav-group { position: relative; }

  .mm-x-nav-group--mega { position: static; }

  .mm-x-nav-group:focus-within::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    height: 18px;
  }

  .mm-x-nav-parent { cursor: pointer; }

  .mm-x-nav-dropdown {
    position: absolute;
    left: 0;
    top: calc(100% + 12px);
    z-index: 60;
    display: grid;
    gap: 2px;
    min-width: 230px;
    padding: 10px;
    background: var(--mmx-white);
    border: 1px solid var(--mmx-line);
    border-radius: var(--mmx-radius);
    box-shadow: 0 16px 48px rgba(15, 23, 42, .14);
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity .16s ease, transform .16s ease;
  }

  .mm-x-nav-group:hover .mm-x-nav-dropdown,
  .mm-x-nav-group:focus-within .mm-x-nav-dropdown {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .mm-x-nav-dropdown a {
    padding: 9px 12px;
    border-radius: 6px;
    font-weight: 700;
  }

  .mm-x-nav-dropdown a:hover { background: var(--mmx-soft); color: var(--mmx-red); }

  .mm-x-nav-mega {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 60;
    background: var(--mmx-white);
    border-top: 1px solid var(--mmx-line);
    border-bottom: 1px solid var(--mmx-line);
    box-shadow: 0 24px 48px rgba(15, 23, 42, .14);
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    /* 关键: exit transition 延迟 0.25s,给鼠标穿过间隙的时间 */
    transition: opacity .2s ease, transform .2s ease, visibility 0s .25s;
    visibility: hidden;
  }

  .mm-x-nav-mega::before {
    content: "";
    position: absolute;
    top: -24px;
    left: 0;
    right: 0;
    height: 24px;
  }

  .mm-x-nav-group--mega:hover .mm-x-nav-mega,
  .mm-x-nav-group--mega:focus-within .mm-x-nav-mega {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    visibility: visible;
    /* enter 立即响应,无延迟 */
    transition: opacity .2s ease, transform .2s ease, visibility 0s 0s;
  }

  .mm-x-nav-group .mm-x-nav-parent {
    padding-bottom: 24px;
    margin-bottom: -24px;
  }

  .mm-x-mega {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 26px 0 30px;
    display: grid;
    gap: 24px;
  }

  .mm-x-mega--tabs { grid-template-columns: 220px minmax(0, 1fr); }

  .mm-x-mega-tabs {
    display: grid;
    gap: 6px;
    align-content: start;
    border-right: 1px solid var(--mmx-line);
    padding-right: 16px;
  }

  .mm-x-mega-tab {
    text-align: left;
    background: none;
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 6px;
    padding: 10px 12px;
    cursor: pointer;
    transition: .16s ease;
  }

  .mm-x-mega-tab strong { display: block; font-size: 14px; }

  .mm-x-mega-tab small { color: var(--mmx-muted); font-size: 12px; font-weight: 700; }

  .mm-x-mega-tab:hover { background: var(--mmx-soft); }

  .mm-x-mega-tab.mm-x-active {
    background: #fff0f0;
    border-left-color: var(--mmx-red);
  }

  .mm-x-mega-panel { display: none; }

  .mm-x-mega-panel.mm-x-active {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
  }

  .mm-x-mega-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
  }

  .mm-x-mega-card {
    display: block;
    border: 1px solid var(--mmx-line);
    border-radius: var(--mmx-radius);
    background: var(--mmx-white);
    overflow: hidden;
    transition: .2s ease;
  }

  .mm-x-mega-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--mmx-shadow);
  }

  .mm-x-mega-card img {
    width: 100%;
    aspect-ratio: 1.7 / 1;
    object-fit: cover;
  }

  .mm-x-mega-card strong {
    display: block;
    padding: 10px 12px 2px;
    font-size: 14px;
    line-height: 1.25;
  }

  .mm-x-mega-card small {
    display: block;
    padding: 0 12px 12px;
    color: var(--mmx-muted);
    font-weight: 700;
  }

  .mm-x-mega-more, .mm-x-mega-all {
    grid-column: 1 / -1; /* 独占一行 */
    color: var(--mmx-red);
    font-weight: 800;
    font-size: 13px;
    align-self: center;
  }

  .mm-x-mega-more::after, .mm-x-mega-all::after { content: " →"; }

  .mm-x-mega-all { padding: 10px 12px; }

  .mm-x-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: none;
    border: 1px solid var(--mmx-line);
    border-radius: 6px;
    cursor: pointer;
  }

  .mm-x-nav-toggle span {
    display: block;
    height: 2px;
    background: var(--mmx-ink);
    border-radius: 2px;
  }

  html.mm-x-nav-lock, html.mm-x-nav-lock body { overflow: hidden; }

  .mm-x-main-nav {
    display: flex;
    align-items: center;
    gap: 22px;
    color: #2b3037;
    font-size: 14px;
    font-weight: 900;
  }

  .mm-x-main-nav a.mm-x-active {
    color: var(--mmx-red);
  }
}

@layer mm-responsive {
  @media (max-width: 1080px) {
    .mm-x-main-nav {
      gap: 14px;
      font-size: 13px;
    }
  }
}

@layer mm-responsive {
  @media (max-width: 980px) {
    .mm-x-main-nav {
      display: none;
    }

    .mm-x-main-nav {
      display: none;
      position: absolute;
      left: 0;
      right: 0;
      top: 100%;
      z-index: 60;
      flex-direction: column;
      align-items: stretch;
      gap: 2px;
      padding: 12px 20px 20px;
      background: var(--mmx-white);
      border-bottom: 1px solid var(--mmx-line);
      box-shadow: 0 24px 48px rgba(15, 23, 42, .14);
      max-height: calc(100vh - 120px);
      overflow-y: auto;
    }

    .mm-x-main-nav.mm-x-open { display: flex; }

    .mm-x-main-nav > a, .mm-x-nav-parent {
      display: block;
      padding: 11px 4px;
      border-bottom: 1px solid var(--mmx-line);
    }
  }
}

@layer mm-responsive {
  /* ── Small phone ─────────────────────────────────────────────────── */
  @media (max-width: 480px) {
    .mm-x-brand {
      gap: 8px;
      min-width: auto;
    }
    .mm-x-brand img {
      width: 56px;
      height: 32px;
    }
    .mm-x-brand span {
      font-size: 14px;
    }
    .mm-x-nav-tools .mm-x-btn {
      min-height: 38px;
      padding: 0 12px;
    }
  }
}