/* ============================================================
   AXEN 产品资料库 Portal — 样式
   设计语言：参考 axen-heatpump.com 蓝/白工业风，克制、专业
   ============================================================ */

:root {
  --blue: #368cc3;
  --blue-dark: #2a76a8;
  --blue-deep: #1f5c84;
  --blue-soft: #edf4fa;
  --blue-line: #cfe0ee;

  --ink: #282828;
  --ink-2: #4d4d4d;
  --ink-3: #8c8c8c;

  --bg: #f7f7f7;
  --card: #ffffff;
  --line: #e5e5e5;
  --line-soft: #eeeeee;

  --red: #da2337;
  --amber: #a8691a;
  --amber-soft: #faf1e4;

  --radius: 8px;
  --radius-sm: 5px;
  --shadow-sm: 0 1px 2px rgba(20, 30, 40, 0.05);
  --shadow-md: 0 4px 14px rgba(20, 30, 40, 0.08);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
}

/* ---------- 顶部导航 ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand .logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--blue);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.brand .brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand .brand-name { font-size: 15px; font-weight: 600; color: var(--ink); letter-spacing: 0.2px; }
.brand .brand-sub { font-size: 11px; color: var(--ink-3); }

.nav-right { display: flex; align-items: center; gap: 14px; }
.nav-link {
  font-size: 13px;
  color: var(--ink-2);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
}
.nav-link:hover { color: var(--blue); background: var(--blue-soft); }
.lang-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.lang-btn:hover { border-color: var(--blue); color: var(--blue); }

/* ---------- Hero ---------- */
.hero {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 40px 24px 36px;
}
.hero-inner { max-width: 860px; margin: 0 auto; }
.hero-kicker {
  font-size: 12px;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
}
.hero h1 {
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: -0.3px;
  color: var(--ink);
}
.hero .hero-desc { margin: 0 0 24px; color: var(--ink-2); font-size: 15px; }

.search-wrap { position: relative; margin-bottom: 18px; }
.search-wrap .search-ic {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--ink-3);
}
.search-wrap input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  background: #fff;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search-wrap input::placeholder { color: var(--ink-3); }
.search-wrap input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.bundle-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn .ic { width: 16px; height: 16px; flex: 0 0 auto; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-outline { background: #fff; color: var(--blue-deep); border-color: var(--blue-line); }
.btn-outline:hover { border-color: var(--blue); background: var(--blue-soft); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.spinner {
  width: 14px; height: 14px;
  border: 2px solid rgba(0,0,0,0.15);
  border-top-color: currentColor;
  border-radius: 50%;
  display: inline-block;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 筛选区 ---------- */
.filter-bar {
  max-width: 1160px;
  margin: -1px auto 0;
  padding: 24px 24px 0;
}
.filter-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.filter-row { display: flex; align-items: flex-start; gap: 14px; }
.filter-row + .filter-row { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line-soft); }
.filter-label {
  flex: 0 0 auto;
  min-width: 72px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  padding-top: 7px;
  letter-spacing: 0.02em;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.tab, .chip {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.13s;
  white-space: nowrap;
}
.tab:hover, .chip:hover { border-color: var(--blue); color: var(--blue); }
.tab.active, .chip.active {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  font-weight: 500;
}

/* ---------- 结果区 ---------- */
.results {
  max-width: 1160px;
  margin: 0 auto;
  padding: 28px 24px 72px;
}
.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
#resultCount { font-size: 13px; color: var(--ink-3); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  gap: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover { border-color: var(--blue-line); box-shadow: var(--shadow-md); }
.card.missing { border-style: dashed; border-color: #e8d0a8; background: #fffdf9; }

.card-ic {
  flex: 0 0 auto;
  width: 42px; height: 42px;
  border-radius: 7px;
  background: var(--blue-soft);
  display: grid;
  place-items: center;
  color: var(--blue-deep);
}
.card-ic svg { width: 20px; height: 20px; }
.card.missing .card-ic { background: var(--amber-soft); color: var(--amber); }

.card-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.card-title { font-size: 14px; font-weight: 600; line-height: 1.4; color: var(--ink); }
.card-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.meta-type { font-size: 12px; color: var(--blue-deep); font-weight: 500; }
.meta-models { font-size: 12px; color: var(--ink-3); }
.card-file {
  font-size: 11.5px;
  color: var(--ink-3);
  font-family: var(--mono);
  word-break: break-all;
  background: #fafafa;
  border: 1px solid var(--line-soft);
  padding: 3px 7px;
  border-radius: 5px;
}
.note {
  font-size: 12px;
  color: var(--amber);
  background: var(--amber-soft);
  padding: 4px 8px;
  border-radius: 5px;
}
.card-tags { display: flex; gap: 5px; flex-wrap: wrap; }
.badge {
  font-size: 10.5px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
}
.badge.ghost {
  background: #f1f1f1;
  color: var(--ink-3);
}
.card-actions { display: flex; align-items: flex-end; }
.btn-dl {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--blue);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.14s;
  white-space: nowrap;
}
.btn-dl:hover { background: var(--blue-dark); }
.btn-dl svg { width: 14px; height: 14px; }
.btn-dl.disabled {
  background: #f2ede3;
  color: var(--amber);
  cursor: not-allowed;
}

.empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 72px 20px;
  color: var(--ink-3);
  font-size: 14px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px dashed var(--line);
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  text-align: center;
  color: var(--ink-3);
  font-size: 13px;
  background: #fff;
}

/* ---------- toast ---------- */
#toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: #fff;
  padding: 11px 20px;
  border-radius: 6px;
  font-size: 13px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s;
  z-index: 100;
  max-width: 90vw;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .hero h1 { font-size: 22px; }
  .hero { padding: 32px 18px 30px; }
  .btn { padding: 9px 14px; font-size: 13px; }
  .filter-row { flex-direction: column; gap: 8px; }
  .filter-label { padding-top: 0; }
  .grid { grid-template-columns: 1fr; }
  .card { flex-wrap: wrap; }
  .card-actions { width: 100%; }
  .btn-dl { width: 100%; justify-content: center; }
}