*, *::before, *::after { box-sizing: border-box; }

:root {
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-raised: #253348;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
.hm-header {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 56px;
  z-index: 100;
}

.hm-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.hm-logo span { color: var(--accent); }

.hm-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hm-nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 6px;
  transition: color 0.15s;
}
.hm-nav-link:hover { color: var(--accent); }

/* ── 切换下拉 ── */
.hm-switch-wrap {
  position: relative;
}
.hm-switch-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  min-width: 160px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 200;
}
.hm-switch-item {
  display: block;
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: background 0.1s, color 0.1s;
}
.hm-switch-item:hover { background: var(--surface-raised); color: var(--text); }
.hm-switch-current { color: var(--accent); font-weight: 500; pointer-events: none; }

/* ── Buttons ── */
a.hm-btn { text-decoration: none; }

.hm-btn {
  padding: 7px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.hm-btn-primary { background: var(--accent); color: white; border-color: var(--accent); }
.hm-btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.hm-btn-ghost { background: transparent; color: var(--text-muted); border-color: var(--border); }
.hm-btn-ghost:hover { background: var(--surface-raised); color: var(--text); }
.hm-btn-sm { padding: 4px 10px; font-size: 12px; }
.hm-btn-danger { color: #f87171; border-color: #7f1d1d; }
.hm-btn-danger:hover { background: rgba(220,38,38,0.12); }

/* ── Main ── */
.hm-main {
  flex: 1;
  max-width: 1543px; /* 离五列布局仅差 1px 的极限值 */
  width: 100%;
  margin: 32px auto;
  padding: 0 24px;
}

.hm-add-bar {
  margin-bottom: 20px;
}

/* ── Card Grid ── */
.hm-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

/* ── Card ── */
.hm-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
.hm-card-link { cursor: pointer; }
.hm-card-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.45), 0 0 0 1px rgba(59,130,246,0.2);
  border-color: rgba(59,130,246,0.35);
}
.hm-card-link:hover .hm-card-cover img {
  transform: scale(1.04);
}

.hm-card-cover {
  aspect-ratio: 16 / 9;
  background: var(--border);
  overflow: hidden;
}
.hm-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.22s;
}

.hm-card-body {
  padding: 14px 16px 16px;
}
.hm-card-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
  line-height: 1.45;
}
.hm-card-actions {
  margin-top: 10px;
  display: flex;
  gap: 6px;
}

/* ── Admin / drag ── */
.hm-card-admin { cursor: grab; }
.hm-card-admin:active { cursor: grabbing; }
.hm-card-dragging { opacity: 0.35; }
.hm-card-drag-over {
  outline: 2px dashed var(--accent);
  outline-offset: 3px;
}
.hm-drag-handle {
  font-size: 16px;
  color: var(--text-muted);
  margin-right: 6px;
  cursor: grab;
  user-select: none;
  vertical-align: middle;
}

/* ── Empty State ── */
.hm-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 80px 16px;
  font-size: 15px;
}

/* ── Modal ── */
.hm-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}
.hm-modal.hidden { display: none; }

.hm-modal-box {
  background: var(--surface);
  border-radius: 14px;
  padding: 28px 24px;
  width: 340px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 64px rgba(0,0,0,0.55);
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}

.hm-modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  font-size: 16px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}
.hm-modal-close:hover { color: var(--text); }

.hm-modal-title {
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  color: var(--text);
}

.hm-input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  width: 100%;
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.hm-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
}

.hm-error {
  color: #dc2626;
  font-size: 13px;
  text-align: center;
  margin: 0;
}

.hidden { display: none !important; }

/* ── Footer ── */
.icp-footer {
  width: 100%;
  padding: 18px 24px 20px;
  border-top: 1px solid var(--border);
  background: rgba(15,23,42,0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.icp-online-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 20px;
  transition: color 0.15s, background 0.15s;
  letter-spacing: 0.2px;
  font-family: inherit;
}
.icp-online-btn:hover {
  color: var(--accent);
  background: rgba(59,130,246,0.08);
}

.icp-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.icp-footer a {
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: none;
  opacity: 0.65;
  transition: color 0.15s, opacity 0.15s;
}
.icp-footer a:hover { color: var(--accent); opacity: 1; }

@media (max-width: 600px) {
  .hm-header { padding: 0 16px; }
  .hm-main { margin: 20px auto; padding: 0 16px; }
  .hm-grid { grid-template-columns: 1fr; gap: 16px; }
}