/**
 * PB 薄壳移动端响应式（对齐 twigspike bili-responsive 顶栏/频道行为）。
 * 依赖 tokens.css 中的 --nav-h / --gutter。
 */

@media (max-width: 640px) {
  body:has(.pb-bottom-nav),
  html.has-pb-bottom-nav body {
    padding-bottom: calc(56px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 960px) {
  :root {
    --gutter: 12px;
  }

  .bili-hero {
    display: none;
  }

  /* 首页移动端统一实心顶栏；跟 --c-surface（浅色/午夜深色均可读） */
  body.page-home .hd {
    background: color-mix(in srgb, var(--c-surface, #fff) 92%, transparent) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 2px 8px color-mix(in srgb, var(--c-text, #000) 6%, transparent) !important;
    border-bottom: 1px solid color-mix(in srgb, var(--c-border, #e3e5e7) 70%, transparent);
    min-height: var(--nav-h, 56px);
  }
  @supports not (background: color-mix(in srgb, #000 50%, transparent)) {
    body.page-home .hd {
      background: var(--c-surface, #fff) !important;
    }
  }

  body.page-home .hd .nav a,
  body.page-home .hd .hd-trailing > a:not(.hd-login),
  body.page-home .hd .hd-trailing .lang-dd__btn,
  body.page-home .hd .hd-notify__btn,
  body.page-home .hd .user-dd__btn,
  body.page-home .hd .user-dd__name,
  body.page-home .hd .hd-menu {
    color: var(--c-text);
    text-shadow: none;
  }

  body.page-home .hd .lang-dd__btn,
  body.page-home .hd .hd-notify__btn {
    background: transparent !important;
    border-color: transparent !important;
  }

  body.page-home .hd .user-dd__avatar,
  body.page-home .hd .hd-login__avatar {
    box-shadow: none;
  }

  body.page-home .hd .nav a:hover,
  body.page-home .hd .nav a.on {
    color: var(--c-accent) !important;
    background: var(--c-accent-soft);
  }

  body.page-home .hd .brand__logo {
    filter: none;
  }

  body.page-home .hd .sbox {
    background: var(--c-surface-2, #f6f7f8) !important;
    border-color: transparent !important;
  }

  /* 频道 Tab：通栏 + 吸顶（在顶栏下方）；负 margin 抵消 wrap 内边距 */
  .pbs-wrap > .bili-channel,
  .bili-channel {
    position: sticky;
    top: var(--nav-h, 56px);
    z-index: 850;
    display: block;
    gap: 0;
    margin: 0 calc(-1 * var(--gutter, 12px)) 10px;
    padding: 0;
    background: var(--c-surface, #fff);
    border-bottom: 1px solid var(--c-border, #e3e5e7);
    border-radius: 0;
    box-shadow: none;
    transition: box-shadow var(--dur) var(--ease);
  }

  .bili-channel.is-panel-open {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  }

  .bili-channel__tab-scroll {
    padding-left: var(--gutter, 12px);
  }

  .bili-channel--compact {
    margin-bottom: 8px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  /* 横滑 Tab / 横滑卡片不得把整页带偏 */
  .bili-channel__tab-scroll,
  .pb-scroll-row__viewport,
  .mc-row__viewport {
    overscroll-behavior-x: contain;
  }
}