/* css/global.css — 全局公共样式（从原单文件提取） */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

:root {
  --primary:      #4f46e5;
  --primary-dark: #3730a3;
  --accent:       #06b6d4;
  --danger:       #ef4444;
  --success:      #22c55e;
  --warning:      #f59e0b;
  --text:         #111827;
  --muted:        #6b7280;
  --line:         rgba(148, 163, 184, 0.22);
  --card:         rgba(255, 255, 255, 0.78);
  --glass:        rgba(255, 255, 255, 0.68);
  --shadow:       0 24px 80px rgba(15, 23, 42, 0.12);
  --radius:       24px;
}

body {
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 12%, rgba(79, 70, 229, 0.25), transparent 32%),
    radial-gradient(circle at 92% 8%, rgba(6, 182, 212, 0.24), transparent 30%),
    linear-gradient(135deg, #f8fafc 0%, #eef2ff 45%, #ecfeff 100%);
  overflow-x: hidden;
}

/* ── 布局 ── */
.app {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 22px;
}

/* ── 导航栏 ── */
.navbar {
  position: sticky;
  top: 14px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(24px);
  box-shadow: 0 16px 50px rgba(15, 23, 42, 0.08);
}
.brand { display: flex; align-items: center; gap: 12px; cursor: pointer; text-decoration: none; color: inherit; }
.logo {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 16px; color: white;
  font-weight: 900; letter-spacing: -1px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.32);
}
.brand h1 { font-size: 19px; line-height: 1.1; letter-spacing: -0.5px; }
.brand p  { color: var(--muted); font-size: 12px; margin-top: 3px; }
.nav-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.nav-links a {
  padding: 10px 14px; border-radius: 999px;
  color: #334155; font-weight: 700; text-decoration: none;
  transition: 0.22s ease;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary); background: rgba(79, 70, 229, 0.1);
  text-decoration: none;
}
/* 未读消息红点 */
.unread-badge {
  position: absolute; top: -4px; right: -4px;
  min-width: 18px; height: 18px; padding: 0 5px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 999px; font-size: 11px; font-weight: 900;
  color: white; background: #ef4444;
  box-shadow: 0 2px 6px rgba(239,68,68,0.4);
  line-height: 1; pointer-events: none;
}
.user-chip {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px 8px 8px; border-radius: 999px;
  background: #fff; border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.07);
}
.avatar {
  width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 50%; color: white; font-size: 14px; font-weight: 800;
  background: linear-gradient(135deg, #111827, #4f46e5);
}

/* ── 按钮 ── */
button, .btn { border: 0; cursor: pointer; transition: 0.22s ease; font-weight: 700; }
.primary-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 14px; font-size: 14px;
  color: white; background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 14px 30px rgba(79, 70, 229, 0.26);
  text-decoration: none;
  line-height: 1;
}
.primary-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(79, 70, 229, 0.33); }
.primary-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.ghost-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 14px; font-size: 14px;
  background: white; color: #334155; border: 1px solid var(--line);
  text-decoration: none;
  line-height: 1;
}
.ghost-btn:hover { transform: translateY(-2px); color: var(--primary); }
.danger-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 18px; border-radius: 14px; font-size: 14px;
  color: white; background: linear-gradient(135deg, #ef4444, #f97316);
  line-height: 1;
}
.mini-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 36px; padding: 0 12px; border-radius: 12px;
  color: var(--primary); background: rgba(79, 70, 229, 0.1);
  line-height: 1;
}
.mini-btn:hover { color: white; background: var(--primary); }

/* ── 表单控件 ── */
.input, .select, .textarea {
  width: 100%; border: 1px solid var(--line); outline: none;
  color: var(--text); background: rgba(255, 255, 255, 0.86);
  border-radius: 16px; transition: 0.2s ease;
  font-family: inherit; font-size: 14px;
}
.input, .select { height: 48px; padding: 0 15px; }
.textarea       { min-height: 110px; padding: 14px 15px; resize: vertical; }
.input:focus, .select:focus, .textarea:focus {
  border-color: rgba(79, 70, 229, 0.55);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

/* ── 玻璃卡片公共 ── */
.glass-card {
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow);
}
.panel { border-radius: 30px; padding: 24px; }

/* ── 标题行 ── */
.section-title {
  display: flex; align-items: flex-end;
  justify-content: space-between; gap: 14px;
  margin: 30px 0 16px;
}
.section-title h2 { font-size: 28px; letter-spacing: -1px; }
.section-title p  { color: var(--muted); margin-top: 5px; }

/* ── 商品卡片网格 ── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.product-card {
  overflow: hidden; border-radius: 28px; transition: 0.25s ease;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line); box-shadow: var(--shadow);
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 30px 90px rgba(15, 23, 42, 0.16); }
.product-img { position: relative; height: 190px; overflow: hidden; background: #e2e8f0; }
.product-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s ease; }
.product-card:hover .product-img img { transform: scale(1.06); }
.tag {
  position: absolute; left: 12px; top: 12px;
  padding: 7px 10px; border-radius: 999px; color: white;
  background: rgba(15, 23, 42, 0.78); backdrop-filter: blur(12px);
  font-size: 12px; font-weight: 800;
}
.fav {
  position: absolute; right: 12px; top: 12px;
  width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center; border: 0; cursor: pointer;
  background: rgba(255, 255, 255, 0.86); backdrop-filter: blur(12px); font-size: 18px;
}
.fav.active { color: white; background: linear-gradient(135deg, #ef4444, #f97316); }
.product-body { padding: 16px; }
.product-title { min-height: 48px; font-size: 17px; font-weight: 900; line-height: 1.35; margin-bottom: 10px; cursor: pointer; }
.price-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.price     { font-size: 22px; font-weight: 950; color: #ef4444; }
.condition { color: var(--success); background: rgba(34, 197, 94, 0.1); padding: 5px 8px; border-radius: 999px; font-size: 12px; font-weight: 900; }
.seller     { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.seller-left { display: flex; align-items: center; gap: 8px; min-width: 0; }
.seller-avatar { width: 25px; height: 25px; border-radius: 50%; display: grid; place-items: center; color: white; font-size: 11px; font-weight: 900; background: linear-gradient(135deg, #334155, #4f46e5); flex: 0 0 auto; }

/* ── Toast 通知 ── */
.toast { position: fixed; right: 22px; bottom: 22px; z-index: 90; display: grid; gap: 10px; }
.toast-item {
  min-width: 240px; padding: 13px 15px; color: white; border-radius: 16px;
  background: rgba(15, 23, 42, 0.92); box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
  animation: slideUp 0.24s ease;
}
@keyframes slideUp { from { transform: translateY(12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ── 空状态 ── */
.empty {
  padding: 40px 20px; text-align: center; color: var(--muted);
  background: rgba(255, 255, 255, 0.68);
  border: 1px dashed rgba(148, 163, 184, 0.45); border-radius: 24px;
}

/* ── Loading ── */
.loading-overlay {
  position: fixed; inset: 0; display: grid; place-items: center;
  background: rgba(255,255,255,0.7); backdrop-filter: blur(6px); z-index: 50;
}
.spinner {
  width: 40px; height: 40px; border-radius: 50%;
  border: 4px solid rgba(79, 70, 229, 0.2);
  border-top-color: var(--primary);
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Badge / Pill ── */
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 999px;
  color: var(--primary-dark); background: rgba(79, 70, 229, 0.1);
  font-size: 13px; font-weight: 800; margin-bottom: 18px;
}
.pill { padding: 8px 10px; border-radius: 999px; color: #334155; background: #f1f5f9; font-size: 12px; font-weight: 900; }

/* ── 渐变文字 ── */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ── 错误提示 ── */
.error-tip { color: var(--danger); font-size: 13px; margin-top: 6px; }

/* ── 响应式 ── */
@media (max-width: 1100px) {
  .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .app { padding: 12px; }
  .navbar { align-items: flex-start; flex-direction: column; }
  .nav-links { width: 100%; }
  .nav-links a { flex: 1; text-align: center; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .user-chip { width: 100%; }
}
@media (max-width: 480px) {
  .product-grid { grid-template-columns: 1fr; }
}