:root {
  --ink: #17202a;
  --muted: #667085;
  --line: #d7dee8;
  --paper: #ffffff;
  --soft: #f3f6fa;
  --green: #3f5873;
  --blue: #2f6fbd;
  --red: #315d82;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: #f5f7fa;
}

.header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-end;
  padding: 34px clamp(18px, 5vw, 64px);
  color: #fff;
  background:
    linear-gradient(120deg, rgba(34, 49, 63, 0.94), rgba(63, 88, 115, 0.88)),
    url("https://images.unsplash.com/photo-1557804506-669a67965ba0?auto=format&fit=crop&w=1500&q=80") center/cover;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

.sub {
  max-width: 620px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.7;
}

.contact {
  flex: 0 0 auto;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 8px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

main {
  width: min(1220px, calc(100% - 32px));
  margin: 22px auto 46px;
}

.controls {
  display: grid;
  grid-template-columns: 1fr repeat(3, 180px);
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

label span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

input,
select {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(63, 88, 115, 0.16);
}

.stats {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 18px 0 12px;
  color: var(--muted);
}

.stats strong {
  color: var(--green);
  font-size: 26px;
}

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
}

.tabs button {
  flex: 0 0 auto;
  min-height: 36px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  cursor: pointer;
}

.tabs button.active,
.tabs button:hover {
  border-color: var(--green);
  background: #e8eef5;
  color: #2f4156;
  font-weight: 700;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 260px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 22px rgba(32, 45, 58, 0.06);
}

.card-head,
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-head {
  justify-content: space-between;
}

.card-head span,
.card-head small,
.meta span {
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--soft);
  color: var(--muted);
  font-size: 12px;
}

.card-head span {
  background: #e8eef5;
  color: #2f4156;
  font-weight: 800;
}

.card h2 {
  margin: 14px 0 10px;
  color: #c0392b;
  font-size: 18px;
  line-height: 1.42;
  letter-spacing: 0;
}

.title-link {
  color: #c0392b;
  text-decoration: none;
}

.title-link:hover {
  text-decoration: underline;
}

.price {
  margin: 14px 0;
  color: var(--red);
  font-size: 24px;
  font-weight: 900;
}

dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

dl div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 10px;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
}

.card p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.empty {
  grid-column: 1 / -1;
  padding: 42px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 920px) {
  .controls {
    grid-template-columns: 1fr 1fr;
  }

  .grid {
    grid-template-columns: 1fr 1fr;
  }

  .search {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .header,
  .controls,
  .grid {
    grid-template-columns: 1fr;
  }

  .header {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact {
    width: 100%;
    text-align: center;
  }
}