/*
 * ca-business-tools.css
 * 在线生意工具 — 前台展示页（顶级 UX/UI 设计）
 * v2.7 — hero stats + 玻璃拟态卡片 + 交错入场 + 搜索交互
 */

.ca-biz-tools {
  --bt-gold:        #f59e0b;
  --bt-gold-light:  #fef3c7;
  --bt-gold-bg:     rgba(245, 158, 11, 0.08);
  --bt-text:        #1a1a2e;
  --bt-sub:         #64748b;
  --bt-border:      #e8ecf1;
  --bt-bg-card:     #ffffff;
  --bt-bg-page:     #f8fafc;
  --bt-radius:      16px;
  --bt-shadow:      0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --bt-shadow-hover:0 12px 40px rgba(0,0,0,0.1), 0 2px 8px rgba(0,0,0,0.04);
  --bt-ease:        cubic-bezier(0.34, 1.56, 0.64, 1);

  max-width: 1320px;
  margin: 0 auto;
  padding: 60px 28px 100px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  color: var(--bt-text);
}

/* ============================================================
   Hero 区域 — 渐变背景 + 统计条
   ============================================================ */

.ca-biz-tools__hero {
  text-align: center;
  margin-bottom: 48px;
  padding: 56px 24px 44px;
  background: radial-gradient(ellipse 80% 120% at 50% 0%, #fef9e7 0%, transparent 70%),
              linear-gradient(180deg, #fafafa 0%, #ffffff 100%);
  border-radius: 24px;
}

.ca-biz-tools__title {
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--bt-text);
  margin: 0 0 14px;
  line-height: 1.15;
}

.ca-biz-tools__subtitle {
  font-size: 18px;
  color: var(--bt-sub);
  margin: 0 0 32px;
  font-weight: 400;
  line-height: 1.6;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.ca-biz-tools__stats {
  display: flex;
  justify-content: center;
  gap: 32px;
}

.ca-biz-tools__stat {
  font-size: 14px;
  color: var(--bt-sub);
}

.ca-biz-tools__stat strong {
  font-size: 22px;
  font-weight: 800;
  color: var(--bt-gold);
  display: block;
  line-height: 1.3;
}

/* ============================================================
   搜索栏 — 清除按钮 + 交互动效
   ============================================================ */

.ca-biz-tools__search-bar {
  position: relative;
  max-width: 600px;
  margin: 0 auto 40px;
}

.ca-biz-tools__search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  pointer-events: none;
  line-height: 1;
  transition: color 0.2s;
  z-index: 1;
}

.ca-biz-tools__search-input {
  width: 100%;
  box-sizing: border-box;
  padding: 15px 52px 15px 52px;
  border: 2px solid var(--bt-border);
  border-radius: 60px;
  font-size: 16px;
  color: var(--bt-text);
  background: var(--bt-bg-card);
  transition: all 0.25s ease;
  outline: none;
  box-shadow: var(--bt-shadow);
}

.ca-biz-tools__search-input::placeholder { color: #94a3b8; }

.ca-biz-tools__search-input:focus {
  border-color: var(--bt-gold);
  box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.1), var(--bt-shadow);
}

.ca-biz-tools__search-input:focus ~ .ca-biz-tools__search-icon { color: var(--bt-gold); }

.ca-biz-tools__search-clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: #e8ecf1;
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  font-size: 14px;
  color: #94a3b8;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  padding: 0;
  z-index: 1;
}

.ca-biz-tools__search-clear:hover {
  background: #fca5a5;
  color: #dc2626;
}

/* ============================================================
   分类筛选 — 主分类卡片
   ============================================================ */

.ca-biz-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(176px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.ca-biz-cat-main {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bt-bg-card);
  border: 1.5px solid var(--bt-border);
  border-radius: 14px;
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.3s var(--bt-ease);
  text-align: left;
  font-family: inherit;
  color: inherit;
  box-shadow: var(--bt-shadow);
  outline: none;
}

.ca-biz-cat-main:hover {
  border-color: #d4a853;
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.15);
  transform: translateY(-3px);
}

.ca-biz-cat-main:focus-visible { box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.4); }

.ca-biz-cat-main.is-active {
  background: linear-gradient(135deg, #fef9e7 0%, #fef3c7 100%);
  border-color: var(--bt-gold);
  box-shadow: 0 4px 24px rgba(245, 158, 11, 0.22);
}

.ca-biz-cat-main.is-active .ca-biz-cat-main__label { color: #92400e; font-weight: 700; }

.ca-biz-cat-main.is-active .ca-biz-cat-main__count { background: var(--bt-gold); color: #fff; }

.ca-biz-cat-main__icon { font-size: 26px; line-height: 1; flex-shrink: 0; }

.ca-biz-cat-main__body { display: flex; flex-direction: column; gap: 4px; min-width: 0; }

.ca-biz-cat-main__label {
  font-size: 13px; font-weight: 600; color: var(--bt-text);
  line-height: 1.3; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.ca-biz-cat-main__count {
  font-size: 10px; font-weight: 700; color: var(--bt-sub);
  background: #f1f5f9; padding: 2px 10px; border-radius: 10px; align-self: flex-start;
}

/* ============================================================
   子分类 pills
   ============================================================ */

.ca-biz-subs {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 14px 0 10px; margin-bottom: 10px;
  border-bottom: 1px solid var(--bt-border);
  animation: subsSlideIn 0.35s var(--bt-ease);
}

.ca-biz-sub-chip {
  background: var(--bt-bg-card); border: 1.5px solid var(--bt-border);
  color: var(--bt-sub); padding: 6px 18px; border-radius: 50px;
  font-size: 13px; font-weight: 500; cursor: pointer;
  transition: all 0.2s ease; font-family: inherit; line-height: 1.4;
}

.ca-biz-sub-chip:hover { border-color: var(--bt-gold); color: var(--bt-gold); background: var(--bt-gold-bg); }

.ca-biz-sub-chip.is-active {
  background: var(--bt-gold); border-color: var(--bt-gold);
  color: #fff; font-weight: 600; box-shadow: 0 2px 10px rgba(245,158,11,0.35);
}

@keyframes subsSlideIn { from { opacity:0; transform:translateY(-8px); } to { opacity:1; transform:translateY(0); } }

.ca-biz-subs-desc {
  font-size: 14px; color: var(--bt-sub); line-height: 1.7;
  margin: 8px 0 0; padding: 12px 16px;
  background: #f8fafc; border-left: 3px solid var(--bt-gold);
  border-radius: 0 8px 8px 0; width: 100%;
}

.ca-biz-tools__hero-img {
  display: block; margin: 0 auto 20px;
  border-radius: 16px; max-width: 200px; height: auto;
}

/* ============================================================
   计数
   ============================================================ */

.ca-biz-tools__count {
  text-align: center; font-size: 13px; color: var(--bt-sub);
  margin-bottom: 28px; font-weight: 500;
}

/* ============================================================
   工具卡片网格
   ============================================================ */

.ca-biz-tools__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.ca-biz-card {
  display: flex; flex-direction: column;
  background: var(--bt-bg-card);
  border: 1.5px solid var(--bt-border);
  border-radius: var(--bt-radius);
  padding: 28px;
  text-decoration: none; color: inherit; position: relative;
  transition: all 0.4s var(--bt-ease);
  box-shadow: var(--bt-shadow); overflow: hidden;
}

.ca-biz-card--enter {
  animation: cardSlideIn 0.5s ease-out both;
  animation-delay: var(--card-delay, 0ms);
}

.ca-biz-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--bt-gold), #fbbf24, var(--bt-gold));
  opacity: 0; transition: opacity 0.35s ease;
}

.ca-biz-card:hover {
  border-color: var(--bt-gold);
  box-shadow: var(--bt-shadow-hover);
  transform: translateY(-4px);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(4px);
}

.ca-biz-card:hover::before { opacity: 1; }

.ca-biz-card[data-biz-featured="1"] {
  border-color: rgba(245,158,11,0.35);
  background: linear-gradient(135deg, #fffefa 0%, #ffffff 100%);
  animation: shimmerBorder 3s ease-in-out infinite;
}

.ca-biz-card[data-biz-featured="1"]:hover { border-color: var(--bt-gold); }

@keyframes shimmerBorder {
  0%,100% { border-color: rgba(245,158,11,0.25); }
  50% { border-color: rgba(245,158,11,0.6); box-shadow: 0 0 0 2px rgba(245,158,11,0.1); }
}

@keyframes cardSlideIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ca-biz-card.hidden { display: none; }

.ca-biz-card__badge {
  position: absolute; top: 16px; right: 16px;
  font-size: 11px; font-weight: 700;
  background: var(--bt-gold-light); color: #92400e;
  padding: 4px 12px; border-radius: 20px; line-height: 1.5;
}

.ca-biz-card__icon { font-size: 44px; margin-bottom: 18px; line-height: 1; display: block; transition: transform 0.3s var(--bt-ease); }
.ca-biz-card:hover .ca-biz-card__icon { transform: scale(1.1); }

.ca-biz-card__body { flex: 1; margin-bottom: 18px; }

.ca-biz-card__name {
  font-size: 18px; font-weight: 700; margin: 0 0 8px;
  color: var(--bt-text); line-height: 1.3; padding-right: 70px;
}

.ca-biz-card__desc {
  font-size: 14px; color: var(--bt-sub); margin: 0; line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.ca-biz-card__footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; border-top: 1px solid var(--bt-border);
}

.ca-biz-card__cat {
  font-size: 12px; font-weight: 600; color: var(--bt-gold);
  background: var(--bt-gold-bg); padding: 4px 10px; border-radius: 6px; letter-spacing: 0.02em;
}

.ca-biz-card__arrow {
  font-size: 20px; color: var(--bt-sub);
  transition: color 0.2s, transform 0.2s;
}

.ca-biz-card:hover .ca-biz-card__arrow {
  color: var(--bt-gold); transform: translateX(4px);
}

/* ============================================================
   空状态
   ============================================================ */

.ca-biz-tools__empty { text-align: center; padding: 80px 20px; }
.ca-biz-tools__empty-inner { max-width: 360px; margin: 0 auto; }
.ca-biz-tools__empty-icon { font-size: 56px; display: block; margin-bottom: 20px; }
.ca-biz-tools__empty h3 { font-size: 18px; font-weight: 700; color: var(--bt-text); margin: 0 0 8px; }
.ca-biz-tools__empty p  { font-size: 14px; color: var(--bt-sub); margin: 0 0 20px; }

.ca-biz-chip--reset {
  display: inline-block; border: 1.5px solid var(--bt-gold);
  color: var(--bt-gold); padding: 8px 24px;
  border-radius: 50px; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all 0.2s; background: transparent; font-family: inherit;
}
.ca-biz-chip--reset:hover { background: var(--bt-gold); color: #fff; }

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 768px) {
  .ca-biz-tools { padding: 28px 16px 60px; }
  .ca-biz-tools__hero { padding: 36px 16px 28px; }
  .ca-biz-tools__title { font-size: 26px; }
  .ca-biz-tools__subtitle { font-size: 15px; }
  .ca-biz-tools__stats { gap: 20px; }
  .ca-biz-tools__stat strong { font-size: 18px; }

  .ca-biz-categories { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; }
  .ca-biz-cat-main { padding: 12px 14px; gap: 8px; }
  .ca-biz-cat-main__icon { font-size: 22px; }
  .ca-biz-cat-main__label { font-size: 12px; }

  .ca-biz-tools__grid { grid-template-columns: 1fr; gap: 16px; }
  .ca-biz-card { padding: 22px; }

  .ca-biz-tools__search-input { padding: 13px 44px 13px 44px; font-size: 14px; }
  .ca-biz-tools__search-bar { max-width: 100%; }
}

@media (max-width: 480px) {
  .ca-biz-tools { padding: 20px 12px 40px; }
  .ca-biz-tools__hero { padding: 24px 12px 20px; }
  .ca-biz-tools__stats { flex-direction: column; gap: 8px; }
  .ca-biz-categories { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .ca-biz-cat-main { padding: 10px 12px; border-radius: 12px; }
  .ca-biz-cat-main__label { font-size: 11px; }
  .ca-biz-subs { gap: 6px; }
  .ca-biz-sub-chip { padding: 5px 12px; font-size: 12px; }
}