:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #6b7785;
  --line: #e4e9f0;
  --brand: #e8541e;
  --brand-soft: #fff1ea;
  --blue: #2563eb;
  --up: #d62828;     /* 涨：红 */
  --down: #1a8754;   /* 跌：绿 */
  --shadow: 0 4px 18px rgba(31, 41, 51, 0.06);
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #ff7a45 0%, #e8541e 55%, #c93b12 100%);
  color: #fff;
  padding: 38px 0 64px;
}
.hero .wrap { display: flex; flex-direction: column; gap: 8px; }
.hero h1 { font-size: 30px; font-weight: 800; letter-spacing: 1px; }
.hero .sub { opacity: 0.92; font-size: 15px; }
.hero .date-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255, 255, 255, 0.18);
  padding: 5px 14px; border-radius: 999px; font-size: 13px;
  width: fit-content; margin-top: 4px;
}
.date-pill.live { background: rgba(26, 135, 84, 0.92); font-weight: 600; }

/* ---------- National average ---------- */
.avg-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin-top: -40px;
}
.avg-card {
  background: var(--card); border-radius: var(--radius);
  padding: 20px 18px; box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.avg-card .label { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.avg-card .price { font-size: 30px; font-weight: 800; margin: 8px 0 4px; }
.avg-card .price small { font-size: 14px; font-weight: 600; color: var(--muted); }
.avg-card .chg { font-size: 13px; font-weight: 600; }
.chg.up { color: var(--up); }
.chg.down { color: var(--down); }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.c92 { background: #e8541e; }
.dot.c95 { background: #f4a300; }
.dot.c98 { background: #7b5cff; }
.dot.cd0 { background: #2563eb; }

/* ---------- Forecast banner ---------- */
.banner {
  margin: 26px 0 8px;
  background: linear-gradient(135deg, #eafaf1, #dff5ea);
  border: 1px solid #bfe9d2;
  border-radius: var(--radius); padding: 18px 22px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.banner .ico {
  width: 46px; height: 46px; border-radius: 12px; flex: none;
  display: grid; place-items: center; font-size: 24px;
  background: #1a8754; color: #fff;
}
.banner .b-main { font-size: 16px; font-weight: 700; }
.banner .b-sub { font-size: 13px; color: var(--muted); }
.banner .b-tag {
  margin-left: auto; background: #1a8754; color: #fff;
  padding: 8px 16px; border-radius: 999px; font-weight: 700; font-size: 14px;
}
.banner .b-tag.up { background: #e03131; }   /* 预计上调 → 红 */
.banner .b-tag.down { background: #1a8754; }  /* 预计下调 → 绿 */
.banner .b-tag.hold { background: #868e96; }  /* 预计搁浅 → 灰 */

/* ---------- Controls ---------- */
.controls { margin: 28px 0 14px; }
.controls .search {
  width: 100%; padding: 13px 18px; font-size: 15px;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--card); outline: none; transition: border .2s;
}
.controls .search:focus { border-color: var(--brand); }
.region-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.region-tabs button {
  border: 1px solid var(--line); background: var(--card);
  color: var(--muted); padding: 7px 16px; border-radius: 999px;
  font-size: 13px; cursor: pointer; transition: all .15s;
}
.region-tabs button:hover { border-color: var(--brand); color: var(--brand); }
.region-tabs button.active {
  background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600;
}

/* ---------- Province grid ---------- */
.section-title { font-size: 18px; font-weight: 700; margin: 30px 0 14px; }
.prov-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.prov-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s;
  cursor: pointer;
}
.prov-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(31,41,51,.1); }
.prov-card .pname { font-size: 16px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
.prov-card .pregion { font-size: 11px; color: var(--muted); background: var(--bg); padding: 2px 8px; border-radius: 6px; }
.prov-card .prices { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 12px; margin-top: 12px; }
.prov-card .pcell .k { font-size: 11px; color: var(--muted); }
.prov-card .pcell .v { font-size: 17px; font-weight: 700; }
.prov-card .pcell .v span { font-size: 11px; font-weight: 500; color: var(--muted); }
.prov-card .na { color: #c2c9d2; }

/* ---------- Chart ---------- */
.chart-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); margin-top: 8px;
}
.chart-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.chart-head h3 { font-size: 16px; font-weight: 700; }
.chart-head .grade-tabs { display: flex; gap: 6px; margin-left: auto; }
.chart-head .grade-tabs button {
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
  padding: 5px 12px; border-radius: 8px; font-size: 12px; cursor: pointer;
}
.chart-head .grade-tabs button.active { background: var(--blue); border-color: var(--blue); color: #fff; }
.bar-row { display: grid; grid-template-columns: 64px 1fr 64px; align-items: center; gap: 10px; margin: 7px 0; }
.bar-row .bl { font-size: 13px; color: var(--muted); text-align: right; }
.bar-row .bt { height: 18px; background: var(--brand-soft); border-radius: 6px; overflow: hidden; }
.bar-row .bt > i { display: block; height: 100%; background: linear-gradient(90deg,#ff9a6c,#e8541e); border-radius: 6px; }
.bar-row .bv { font-size: 13px; font-weight: 700; text-align: left; }
.bar-row.hi .bt > i { background: linear-gradient(90deg,#ffb3b3,#d62828); }
.bar-row.lo .bt > i { background: linear-gradient(90deg,#9fe6c2,#1a8754); }

/* ---------- Calculator ---------- */
.calc-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); margin-top: 8px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: end;
}
.calc-card .field label { font-size: 13px; color: var(--muted); display: block; margin-bottom: 6px; }
.calc-card .field select, .calc-card .field input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 14px; background: var(--card); outline: none;
}
.calc-card .field select:focus, .calc-card .field input:focus { border-color: var(--brand); }
.calc-result {
  grid-column: 1 / -1; margin-top: 6px; padding: 14px 18px;
  background: var(--brand-soft); border-radius: 12px; font-size: 15px;
}
.calc-result b { color: var(--brand); font-size: 20px; }

/* ---------- Footer ---------- */
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 36px 0 50px; line-height: 1.8; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .avg-grid { grid-template-columns: repeat(2, 1fr); }
  .prov-grid { grid-template-columns: repeat(2, 1fr); }
  .calc-card { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .avg-grid { grid-template-columns: 1fr; }
  .prov-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
}