/* ==========================================================
   让页脚贴底：body 用 flex 垂直布局
   main 撑开填满剩余空间 → 内容少时页脚贴底，
   内容多时页脚跟随滚动，两种情况下位置都正确
   ========================================================== */
body {
  display: flex;
  flex-direction: column;
}

/* ============ 布局 ============ */
main {
  position: relative;
  z-index: 2;
  flex: 1 0 auto;              /* ← 撑开填满剩余高度 */
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 68px 24px 60px;
}

/* ============ 头部 ============ */
.hero { text-align: center; margin-bottom: 40px; }

.clock {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 15px;
  margin-bottom: 24px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--card-solid);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 12.5px;
  font-weight: 400;
  letter-spacing: .03em;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
  animation: fadeDown .7s cubic-bezier(.2, .8, .2, 1) both;
  transition: background .4s, border-color .4s, color .4s;
}
.clock .time {
  color: var(--text);
  font-weight: 500;
  letter-spacing: .06em;
}
.clock .sep {
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-2);
  animation: pulse 2s ease-in-out infinite;
}

.title {
  font-size: clamp(26px, 4.4vw, 38px);
  font-weight: 500;
  letter-spacing: -.018em;
  line-height: 1.25;
  background: linear-gradient(120deg,
              var(--title-1) 10%,
              var(--title-2) 40%,
              var(--title-3) 65%,
              var(--title-1) 95%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fadeUp .8s cubic-bezier(.2, .8, .2, 1) .05s both,
             shine 7s linear infinite 1s;
  transition: background .4s ease;
}

.sub {
  margin-top: 14px;
  font-size: 13.5px;
  font-weight: 300;
  letter-spacing: .04em;
  color: var(--dim);
  animation: fadeUp .8s cubic-bezier(.2, .8, .2, 1) .12s both;
  transition: color .4s;
}

/* ============ 搜索框 ============ */
.search {
  position: relative;
  max-width: 520px;
  margin: 0 auto 36px;
  animation: fadeUp .8s cubic-bezier(.2, .8, .2, 1) .18s both;
}
.search svg {
  position: absolute; left: 18px; top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  stroke: var(--dim);
  fill: none;
  stroke-width: 1.8;
  transition: stroke .3s;
  pointer-events: none;
}
.search input {
  width: 100%;
  padding: 14px 90px 14px 46px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--card-solid);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--text);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .01em;
  font-family: inherit;
  outline: none;
  transition: border-color .3s, box-shadow .3s, background .4s, color .4s;
}
.search input::placeholder { color: var(--placeholder); font-weight: 300; }
.search input:focus {
  border-color: var(--border-hover);
  background: var(--card-hover);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, .12), 0 12px 40px -16px var(--card-shadow);
}
.search:focus-within svg { stroke: var(--accent-2); }
.search .hint {
  position: absolute; right: 18px; top: 50%;
  transform: translateY(-50%);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--placeholder);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
  pointer-events: none;
  transition: opacity .25s;
}
.search input:focus ~ .hint { opacity: 0; }

/* ============ 分类标签 ============ */
.tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 30px;
  animation: fadeUp .8s cubic-bezier(.2, .8, .2, 1) .24s both;
}
.tab {
  padding: 7px 17px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--dim);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .02em;
  font-family: inherit;
  cursor: pointer;
  transition: all .28s cubic-bezier(.2, .8, .2, 1);
}
.tab:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--card-hover);
  transform: translateY(-1px);
}
.tab.active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 10px 26px -10px var(--card-shadow);
  font-weight: 500;
}
[data-theme="dark"] .tab.active { color: #0b1120; font-weight: 600; }

/* ============ 卡片网格 ============ */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  cursor: pointer;
  transition: transform .35s cubic-bezier(.2, .8, .2, 1),
              background .4s, border-color .3s, box-shadow .35s;
  animation: rise .62s cubic-bezier(.2, .8, .2, 1) backwards;
  animation-delay: calc(var(--i) * 42ms);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 50%),
              rgba(59, 130, 246, .12), transparent 42%);
  opacity: 0;
  transition: opacity .35s;
  pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card:hover {
  transform: translateY(-6px);
  background: var(--card-hover);
  border-color: var(--border-hover);
  box-shadow: 0 24px 50px -26px var(--card-shadow),
              0 0 0 1px rgba(59, 130, 246, .06) inset;
}
.card:active { transform: translateY(-2px) scale(.985); }

.card .icon { width: 52px; height: 52px; }
.card .icon-unknown { width: 26px; height: 26px; }
.card .icon-img { width: 30px; height: 30px; }

.card:hover .icon,
.card:focus-visible .icon { transform: scale(1.08); }

.meta { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .012em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.desc {
  font-size: 12px;
  font-weight: 300;
  letter-spacing: .02em;
  color: var(--dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color .4s;
}

.arrow {
  position: absolute;
  top: 14px; right: 16px;
  font-size: 12px;
  color: var(--placeholder);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: all .35s cubic-bezier(.2, .8, .2, 1);
}
.card:hover .arrow {
  opacity: 1;
  transform: translate(0, 0);
  color: var(--accent-2);
}

/* ==========================================================
   页脚（只保留版权行 · 随内容滚动，内容少时贴底）
   ========================================================== */
.site-footer {
  position: relative;
  z-index: 2;
  flex: none;                  /* ← 不参与伸缩，保持固定高度 */
  width: 100%;
  margin-top: 40px;
  padding: 28px 24px 32px;
  border-top: 1px solid var(--border);
  background: linear-gradient(
    to bottom,
    rgb(var(--bg-rgb) / 0.55) 0%,
    rgb(var(--bg-rgb) / 1) 100%
  );
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background .4s ease, border-color .4s ease;
  animation: fadeUp .8s cubic-bezier(.2, .8, .2, 1) .3s both;
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
}

.footer-copyright {
  text-align: center;
  font-size: 12.5px;
  font-weight: 300;
  letter-spacing: .03em;
  color: var(--placeholder);
  line-height: 1.8;
}
.footer-copyright a {
  color: var(--dim);
  text-decoration: none;
  transition: color .25s;
}
.footer-copyright a:hover {
  color: var(--accent-2);
}

/* ============ 响应式 ============ */
@media (max-width: 640px) {
  main {
    padding: 44px 16px 50px;
  }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
  .card { padding: 15px; gap: 13px; border-radius: 17px; }
  .card .icon { width: 44px; height: 44px; border-radius: 13px; }
  .card .icon-unknown { width: 22px; height: 22px; }
  .card .icon-img { width: 26px; height: 26px; }
  .name { font-size: 14px; }
  .desc { display: none; }
  .search input { padding-right: 20px; }
  .search .hint { display: none; }

  .site-footer {
    margin-top: 32px;
    padding: 22px 16px 26px;
  }
  .footer-copyright {
    font-size: 12px;
  }
}