/* 访客页手机端公共壳（内容更新.html 不引用）
 * 断点：≤820px 手机抽屉；电脑可 Chrome 设备模式预览 375 / 390 / 430
 * 参考：触控目标约 44–48px；iOS 勿用 background-attachment:fixed（易跳动/空白）
 */

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

/* 默认隐藏遮罩；桌面不占交互 */
.site-nav-backdrop {
  display: none;
}

@media (max-width: 820px) {
  html,
  body {
    overflow-x: clip;
    max-width: 100%;
  }

  /* 手机：关掉电脑端模糊垫底，改用可视化顶栏氛围 */
  .wrapper::before,
  .page::before,
  .wrapper::after,
  .page::after {
    content: none !important;
    display: none !important;
    background: none !important;
    filter: none !important;
  }

  .wrapper,
  .page {
    background-attachment: scroll !important;
    background-image: none !important;
  }

  .site-atmosphere {
    display: block;
    /* 手机顶栏更扁，上下取景才有空间 */
    height: min(calc(100vw * 1097 / 1920 * 0.72), 46vh);
  }

  .site-atmosphere-photo {
    /* 手机端：可视化取景（--atm-m-*）；盖过电脑端固定 top/height */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: var(--atm-m-pos-x, 62%) var(--atm-m-pos-y, 48%);
    transform: scale(var(--atm-m-scale, 1));
    transform-origin: var(--atm-m-pos-x, 62%) var(--atm-m-pos-y, 48%);
    filter: none;
    -webkit-mask-image: linear-gradient(
      180deg,
      #000 0%,
      #000 var(--atm-m-clear, 70%),
      rgba(0, 0, 0, 0.65) var(--atm-m-fade-a, 82%),
      rgba(0, 0, 0, 0.2) var(--atm-m-fade-b, 93%),
      transparent 100%
    );
    mask-image: linear-gradient(
      180deg,
      #000 0%,
      #000 var(--atm-m-clear, 70%),
      rgba(0, 0, 0, 0.65) var(--atm-m-fade-a, 82%),
      rgba(0, 0, 0, 0.2) var(--atm-m-fade-b, 93%),
      transparent 100%
    );
  }

  .site-atmosphere-veil {
    background:
      linear-gradient(
        180deg,
        rgba(11, 15, 23, 0.1) 0%,
        rgba(11, 15, 23, 0.14) var(--atm-m-veil-soft, 52%),
        rgba(11, 15, 23, 0.4) var(--atm-m-veil-mid, 70%),
        rgba(11, 15, 23, 0.85) var(--atm-m-veil-hard, 90%),
        #0b0f17 var(--atm-m-veil-end, 97%),
        #0b0f17 100%
      ),
      linear-gradient(
        90deg,
        rgba(11, 15, 23, 0.35) 0%,
        transparent 12%,
        transparent 88%,
        rgba(11, 15, 23, 0.35) 100%
      );
  }

  .menu-toggle {
    display: grid !important;
    place-items: center;
    top: max(0.85rem, env(safe-area-inset-top, 0px));
    right: max(0.85rem, env(safe-area-inset-right, 0px));
    z-index: 60;
    width: 48px;
    height: 48px;
  }

  #sidebar {
    position: fixed !important;
    inset: 0 auto 0 0;
    transform: translateX(-105%);
    width: min(280px, 86vw);
    height: 100vh;
    height: 100dvh;
    z-index: 55;
    background: rgba(11, 15, 23, 0.96);
    transition: transform 0.28s ease;
    padding-top: max(2.5rem, calc(env(safe-area-inset-top, 0px) + 1.25rem));
    padding-bottom: max(1.5rem, env(safe-area-inset-bottom, 0px));
    box-sizing: border-box;
    flex: 0 0 0 !important;
    margin: 0 !important;
    border: 0 !important;
    overflow: hidden;
    pointer-events: auto;
  }

  #sidebar.is-open {
    transform: translateX(0);
    overflow: auto;
  }

  /* 手机主栏占满整宽 */
  .wrapper {
    display: block;
  }

  .wrapper > main,
  main#main {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .site-nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 50;
    margin: 0;
    padding: 0;
    border: 0;
    background: rgba(0, 0, 0, 0.48);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s ease;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .site-nav-backdrop.is-show {
    opacity: 1;
    pointer-events: auto;
  }

  body.is-nav-open {
    overflow: hidden;
  }

  .wrapper > main,
  main#main {
    padding-top: 5.25rem;
    padding-right: max(1.15rem, env(safe-area-inset-right, 0px));
    padding-bottom: max(2.5rem, env(safe-area-inset-bottom, 0px));
    padding-left: max(1.15rem, env(safe-area-inset-left, 0px));
  }

  .vert-nav a {
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  .page-title {
    letter-spacing: 0.02em;
  }

  /* 作品集：两列一行；占位高度略收 */
  .portfolio-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    min-height: min(48vh, 520px);
  }

  .filter-btn {
    min-height: 40px;
    padding-left: 0.95rem;
    padding-right: 0.95rem;
  }

  /* 筛选：自动换行（方案 A） */
  .filters {
    flex-wrap: wrap;
    gap: 0.45rem;
  }

  /* 价目 CTA 保持电脑端小按钮尺寸；其它通用按钮保留触控高度 */
  .btn,
  .ghost-btn,
  .cta {
    min-height: 44px;
  }
}

@media (max-width: 820px) and (prefers-reduced-motion: reduce) {
  #sidebar,
  .site-nav-backdrop {
    transition: none;
  }
}