/* ==========================================================================
   牛马宝库 · 网址导航（分区 / 网格 / 站点卡片 / 简介气泡）
   ========================================================================== */

.nav {
  /* margin-top: 78px; */
}

.section {
  margin-bottom: 64px;
}

.section:last-child {
  margin-bottom: 0;
}

.section-title {
  margin: 0 0 28px;
  font-size: clamp(19px, 1.9vw, 25px);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-align: center;
  color: #2d3b4f;
}

.section-title .accent {
  background: linear-gradient(0deg, #5cb2ee 0%, #86d3f2 55%, #a6e3f5 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.section-body {
  padding: 38px var(--body-pad) 34px;
  border-radius: var(--radius-card);
}

/* 白底卡片型 */
.section--card .section-body {
  background: rgba(255, 255, 255, 0.7);
  box-shadow:
    0 22px 54px -26px rgba(110, 150, 185, 0.5),
    0 2px 6px rgba(110, 150, 185, 0.05);
}

/* 透明型 */
.section--plain .section-body {
  padding-top: 6px;
  padding-bottom: 6px;
  background: transparent;
}

/* 网格：桌面端一行 9 个 */
.site-grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: var(--grid-gap-y) var(--grid-gap-x);
}

.site {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 8px 2px;
  border-radius: 14px;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.22s ease;
}

.site:hover {
  /* background-color: var(--accent-soft); */
  background:linear-gradient(#00000000,rgba(113, 182, 228, 0.2));
  /* 悬停时抬高层级，简介气泡才不会被相邻图标盖住 */
  z-index: 20;
}

.site:focus-visible {
  outline: 2px solid rgba(43, 143, 214, 0.55);
  outline-offset: 2px;
}

.site-icon {
  width: 54px;
  height: 54px;
  flex: none;
  border-radius: 14px;
  object-fit: contain;
  transition: transform 0.24s cubic-bezier(0.34, 1.4, 0.64, 1);
}

.site:hover .site-icon {
  transform: translateY(-3px) scale(1.06);
}

/* 文字图标：icon 留空或直接填文字时使用，字号由 JS 按字数写在行内 */
.site-icon--text {
  display: grid;
  place-items: center;
  overflow: hidden; /* 保底：极端名称也只裁切，不撑破网格 */
  padding: 0 3px;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.04;
  color: #fff;
  letter-spacing: 0;
  text-align: center;
  user-select: none;
}

/* 四字名称折成两行（「腾讯 / 文档」），用 \n + pre-line 断行 */
.site-icon--text[data-wrap="1"] {
  white-space: pre-line;
  letter-spacing: -0.02em;
}

.site-label {
  max-width: 100%;
  font-size: 12.5px;
  line-height: 1.35;
  color: var(--ink-soft);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s ease;
}

.site:hover .site-label {
  font-weight: bold;
  /* color: var(--accent); */
}

/* 简介气泡：默认隐藏，鼠标在图标上停留 0.3 秒后淡入到下方 */
.site-tip {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  z-index: 30;
  width: max-content;
  max-width: 210px;
  padding: 9px 13px;
  border-radius: 12px;
  background-color: #2d3b4f;
  color: #fff;
  font-size: 12px;
  line-height: 1.55;
  font-weight: 400;
  letter-spacing: 0.01em;
  text-align: center;
  text-decoration: none;
  white-space: normal;
  box-shadow: 0 18px 34px -16px rgba(38, 56, 74, 0.55);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, -4px) scale(0.96);
  transform-origin: 50% 0;
  transition:
    opacity 0.18s ease,
    transform 0.18s ease,
    visibility 0s linear 0.18s;
}

.site:hover .site-tip,
.site:focus-visible .site-tip {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0) scale(1);
  /* 关键：悬停满 0.3 秒才出现，移开立刻淡出 */
  transition-delay: 0.3s;
}

/* 触屏设备没有 hover，窄屏列数少气泡会顶出屏幕，两种情况都不显示 */
@media (hover: none), (max-width: 720px) {
  .site-tip {
    display: none;
  }
}

/* 入场动画 */
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site {
  animation: rise 0.4s both;
  animation-delay: var(--delay, 0ms);
}

/* --------------------------------------------------------------------------
   响应式：一行卡片数量随宽度递减（9 → 7 → 6 → 5 → 4）
   -------------------------------------------------------------------------- */
@media (max-width: 1240px) {
  .site-grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .nav {
    /* margin-top: 60px; */
  }

  .site-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .section {
    margin-bottom: 44px;
  }
}

@media (max-width: 720px) {
  .nav {
    /* margin-top: 48px; */
  }

  .section-title {
    margin-bottom: 18px;
  }

  .section-body {
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .section--plain .section-body {
    padding-top: 0;
    padding-bottom: 0;
  }

  .site-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .site {
    gap: 8px;
    padding: 6px 2px;
  }

  .site-icon {
    width: 46px;
    height: 46px;
    border-radius: 13px;
  }

  .site-icon--text {
    padding: 0 2px; /* 文字图标内边距略收，46px 方块也放得下 */
  }
}

@media (max-width: 460px) {
  .site-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .site-icon {
    width: 42px;
    height: 42px;
  }

  .site-label {
    font-size: 11px;
  }
}