/* ============================================================
   custom.css  —  九头鸟龙 · 主站自定义样式
   主色调：明亮渐变蓝紫 + 暖橙强调色
   ============================================================ */

/* ── CSS 变量 ─────────────────────────────────────────────── */
:root {
  --brand-primary:   #4F8EF7;   /* 主蓝 */
  --brand-secondary: #6C63FF;   /* 紫 */
  --brand-accent:    #FF6B6B;   /* 暖红 */
  --brand-warm:      #FFCD3C;   /* 暖黄 */
  --brand-teal:      #2EC4B6;   /* 青绿 */
  --brand-gradient:  linear-gradient(135deg, #4F8EF7 0%, #6C63FF 100%);
  --brand-gradient-warm: linear-gradient(135deg, #FF6B6B 0%, #FFCD3C 100%);

  --card-radius:     16px;
  --card-shadow:     0 4px 20px rgba(79, 142, 247, 0.12);
  --card-shadow-hover: 0 12px 36px rgba(79, 142, 247, 0.25);
  --transition:      0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 0.18s ease;
}

/* ── 全局微调 ──────────────────────────────────────────────── */
body {
  font-feature-settings: "kern", "liga";
  -webkit-font-smoothing: antialiased;
}

/* 顶部导航条彩色下划线 */
.greedy-nav {
  background: #fff !important;
  border-bottom: 3px solid transparent;
  border-image: var(--brand-gradient) 1;
}
.greedy-nav a {
  color: #333 !important;
  font-weight: 600;
  transition: color var(--transition-fast);
}
.greedy-nav a:hover,
.greedy-nav .site-nav__toggle:hover {
  color: var(--brand-primary) !important;
}

/* 站点标题渐变字 */
.site-title {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800 !important;
  font-size: 1.4rem !important;
  letter-spacing: -0.02em;
}

/* ── 作者侧边栏美化 ────────────────────────────────────────── */
.author__avatar img {
  border: 4px solid transparent;
  background: var(--brand-gradient);
  background-clip: padding-box;
  box-shadow: 0 0 0 4px rgba(79, 142, 247, 0.2);
  border-radius: 50%;
  transition: transform var(--transition), box-shadow var(--transition);
}
.author__avatar img:hover {
  transform: scale(1.06) rotate(3deg);
  box-shadow: 0 0 0 6px rgba(108, 99, 255, 0.3);
}
.author__name {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}
.author__bio {
  color: #6c757d;
  font-style: italic;
  line-height: 1.6;
}
.author__urls a {
  color: var(--brand-primary) !important;
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.author__urls a:hover {
  color: var(--brand-secondary) !important;
  transform: translateX(3px);
}

/* ── Hero 欢迎区 ───────────────────────────────────────────── */
.page__hero--overlay {
  background: var(--brand-gradient) !important;
  border-radius: 0 0 32px 32px;
}

/* ── 子站点区域 ────────────────────────────────────────────── */
.subsites-section {
  margin: 2.5rem 0;
}

.subsites-header {
  text-align: center;
  margin-bottom: 2rem;
  padding: 2rem 1rem;
  background: var(--brand-gradient);
  border-radius: 20px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.subsites-header::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.subsites-header::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}

.subsites-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff !important;
  margin: 0 0 0.5rem;
  position: relative;
  z-index: 1;
  border-bottom: none !important;
}
.subsites-title-icon {
  font-size: 2rem;
  margin-right: 0.4rem;
  animation: float 3s ease-in-out infinite;
  display: inline-block;
}
.subsites-subtitle {
  color: rgba(255,255,255,0.85);
  margin: 0;
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

/* ── 工具栏 ────────────────────────────────────────────────── */
.subsites-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem 1.25rem;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* 搜索框 */
.subsites-search-wrap {
  position: relative;
  flex: 1 1 220px;
  min-width: 180px;
}
.subsites-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--brand-primary);
  font-size: 0.9rem;
  pointer-events: none;
}
.subsites-search {
  width: 100%;
  padding: 0.55rem 2.2rem 0.55rem 2.2rem;
  border: 2px solid #e8edf5;
  border-radius: 50px;
  font-size: 0.92rem;
  color: #333;
  background: #f8faff;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}
.subsites-search:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.15);
  background: #fff;
}
.subsites-search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: none;
  color: #aaa;
  cursor: pointer;
  padding: 2px 4px;
  transition: color var(--transition-fast);
}
.subsites-search-clear:hover { color: var(--brand-accent); }

/* 标签过滤器 */
.subsites-filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: 2 1 300px;
}

.tag-btn {
  padding: 0.3rem 0.9rem;
  border: 2px solid #e0e8ff;
  border-radius: 50px;
  background: #fff;
  color: #555;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.tag-btn:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: #f0f5ff;
}
.tag-btn--active {
  background: var(--brand-gradient) !important;
  border-color: transparent !important;
  color: #fff !important;
  box-shadow: 0 3px 10px rgba(79, 142, 247, 0.35);
}

/* 排序选择器 */
.subsites-sort {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.subsites-sort-label {
  color: var(--brand-secondary);
  font-size: 1rem;
}
.subsites-sort-select {
  padding: 0.35rem 0.7rem;
  border: 2px solid #e0e8ff;
  border-radius: 50px;
  background: #f8faff;
  color: #444;
  font-size: 0.84rem;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition-fast);
}
.subsites-sort-select:focus {
  border-color: var(--brand-primary);
}

/* ── 卡片网格 ──────────────────────────────────────────────── */
.subsites-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
}

/* ── 子站点卡片 ────────────────────────────────────────────── */
.subsite-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.1rem 1.2rem 1.3rem;
  background: #fff;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  text-decoration: none !important;
  color: inherit;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1.5px solid rgba(79, 142, 247, 0.08);
}
.subsite-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--card-shadow-hover);
  border-color: rgba(79, 142, 247, 0.18);
}
/* 顶部彩条 */
.subsite-card__stripe {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent, var(--brand-primary));
  border-radius: var(--card-radius) var(--card-radius) 0 0;
}

/* 图标区 */
.subsite-card__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent, var(--brand-primary)) 15%, #fff), color-mix(in srgb, var(--accent, var(--brand-primary)) 8%, #fff));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  color: var(--accent, var(--brand-primary));
  transition: transform var(--transition);
}
/* 不支持 color-mix 的降级 */
@supports not (color: color-mix(in srgb, red 10%, white)) {
  .subsite-card__icon {
    background: rgba(79, 142, 247, 0.1);
  }
}
.subsite-card:hover .subsite-card__icon {
  transform: rotate(-8deg) scale(1.12);
}
.subsite-emoji-icon {
  line-height: 1;
}

/* 内容区 */
.subsite-card__body {
  flex: 1;
  min-width: 0;
}
.subsite-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
  color: #1a1a2e;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-bottom: none !important;
}
.subsite-card__desc {
  font-size: 0.82rem;
  color: #6c757d;
  margin: 0 0 0.5rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.subsite-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px;
}
.subsite-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.subsite-tag {
  display: inline-block;
  padding: 1px 8px;
  background: linear-gradient(135deg, rgba(79,142,247,0.1), rgba(108,99,255,0.1));
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--brand-secondary);
  border: 1px solid rgba(108,99,255,0.2);
}
.subsite-card__meta {
  font-size: 0.72rem;
  color: #aaa;
  display: flex;
  align-items: center;
  gap: 3px;
}

/* 箭头 */
.subsite-card__arrow {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(79,142,247,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
  font-size: 0.75rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.subsite-card:hover .subsite-card__arrow {
  background: var(--accent, var(--brand-primary));
  color: #fff;
  transform: translateX(3px);
}

/* ── 入场动画 ──────────────────────────────────────────────── */
@keyframes cardIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.subsite-card--animate {
  animation: cardIn 0.45s ease both;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* ── 加载状态 ──────────────────────────────────────────────── */
.subsites-loading {
  text-align: center;
  padding: 2.5rem;
  color: var(--brand-secondary);
}
.subsites-loading p {
  margin-top: 0.8rem;
  font-size: 0.9rem;
  color: #888;
}
.subsites-loading-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
}
.subsites-loading-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand-gradient);
  animation: dotBounce 1.2s ease-in-out infinite;
}
.subsites-loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.subsites-loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
  40%           { transform: scale(1.1); opacity: 1; }
}

/* ── 空状态 ────────────────────────────────────────────────── */
.subsites-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: #aaa;
}
.subsites-empty i {
  font-size: 2.5rem;
  margin-bottom: 0.7rem;
  display: block;
  color: #d0d8e8;
}
.subsites-empty p { margin: 0 0 1rem; }

/* ── 错误状态 ──────────────────────────────────────────────── */
.subsites-error {
  text-align: center;
  padding: 2rem 1rem;
  background: #fff5f5;
  border-radius: 12px;
  border: 1.5px solid #ffcccc;
}
.subsites-error i {
  font-size: 2rem;
  color: var(--brand-accent);
  display: block;
  margin-bottom: 0.6rem;
}
.subsites-error p { color: #e05; margin: 0 0 1rem; }

/* ── 按钮 ──────────────────────────────────────────────────── */
.btn--primary {
  background: var(--brand-gradient) !important;
  border-color: transparent !important;
  color: #fff !important;
  border-radius: 50px !important;
  transition: opacity var(--transition-fast), transform var(--transition-fast) !important;
}
.btn--primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn--warning {
  background: var(--brand-gradient-warm) !important;
  border-color: transparent !important;
  color: #fff !important;
  border-radius: 50px !important;
}

/* ── Feature Row 美化 ──────────────────────────────────────── */
.feature__item {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1.5px solid rgba(79,142,247,0.08);
}
.feature__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(79,142,247,0.18);
}

/* ── 页面主内容区 ───────────────────────────────────────────── */
.page__content h1,
.page__content h2 {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Footer 美化 ───────────────────────────────────────────── */
.page__footer {
  background: #1a1a2e !important;
}
.page__footer-copyright {
  color: rgba(255,255,255,0.5) !important;
}
.page__footer a {
  color: rgba(255,255,255,0.7) !important;
  transition: color var(--transition-fast);
}
.page__footer a:hover { color: var(--brand-warm) !important; }

/* ── 响应式 ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .subsites-grid {
    grid-template-columns: 1fr;
  }
  .subsites-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .subsites-search-wrap { min-width: unset; }
  .subsites-header { border-radius: 14px; }
  .subsites-title { font-size: 1.4rem; }
}

@media (max-width: 480px) {
  .subsite-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .subsite-card__arrow { align-self: flex-end; }
}

/* ── 滚动条美化（Webkit）──────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f0f4ff; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 3px;
}

/* ── 选中文字高亮 ───────────────────────────────────────────── */
::selection {
  background: rgba(79, 142, 247, 0.25);
  color: #1a1a2e;
}