:root {
  --bg: #f6f1e8;
  --bg-deep: #cfe5df;
  --ink: #10212a;
  --muted: #55646c;
  --accent: #e07a5f;
  --accent-strong: #2f5d62;
  --accent-soft: rgba(224, 122, 95, 0.18);
  --card: rgba(255, 255, 255, 0.78);
  --border: rgba(16, 33, 42, 0.12);
  --shadow: 0 24px 64px rgba(16, 33, 42, 0.18);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px circle at 10% 10%, rgba(255, 191, 146, 0.45), transparent 55%),
    radial-gradient(1000px circle at 90% 20%, rgba(107, 187, 191, 0.4), transparent 60%),
    linear-gradient(130deg, var(--bg), var(--bg-deep));
  min-height: 100vh;
  line-height: 1.6;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  filter: blur(0.5px);
  z-index: -1;
  opacity: 0.5;
}

body::before {
  top: -120px;
  right: 8%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 215, 168, 0.9), rgba(255, 215, 168, 0));
}

body::after {
  bottom: -140px;
  left: 6%;
  background: radial-gradient(circle at 70% 30%, rgba(122, 192, 200, 0.9), rgba(122, 192, 200, 0));
}

h1,
h2 {
  font-family: "ZCOOL XiaoWei", "Noto Sans SC", serif;
  margin: 0;
}

main {
  max-width: 1200px;
  margin: 0 auto 80px;
  padding: 0 6vw;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.hero {
  padding: 96px 8vw 56px;
}

.hero-content {
  max-width: 980px;
  margin: 0 auto;
  animation: fadeIn 0.8s ease both;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.eyebrow {
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 16px;
}

.hero-top .eyebrow {
  margin-bottom: 0;
}

.lang-switch {
  display: flex;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.65);
  box-shadow: 0 10px 24px rgba(16, 33, 42, 0.08);
}

.lang-button {
  font-family: inherit;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.lang-button:hover {
  transform: translateY(-1px);
}

.lang-button.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  letter-spacing: 0.04em;
}

.subhead {
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  max-width: 720px;
  color: var(--muted);
  margin: 20px 0 32px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.metric {
  padding: 18px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(16, 33, 42, 0.08);
}

.metric-label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.1rem;
  font-weight: 600;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  animation: rise 0.8s ease both;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.panel-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.timestamp {
  font-size: 0.85rem;
  color: var(--muted);
}

.ghost-button,
.primary-button,
.range-buttons button {
  font-family: inherit;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 10px 18px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.ghost-button {
  background: transparent;
  border-color: var(--border);
  color: var(--accent-strong);
}

.ghost-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(16, 33, 42, 0.12);
}

.primary-button {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 14px 30px rgba(224, 122, 95, 0.4);
}

.primary-button:hover {
  transform: translateY(-1px);
}

.status {
  min-height: 20px;
  font-size: 0.88rem;
  color: var(--accent-strong);
  margin-bottom: 8px;
}

.rates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.rate-card {
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.95), rgba(235, 246, 244, 0.92));
  border-radius: 22px;
  border: 1px solid rgba(16, 33, 42, 0.08);
  padding: 20px;
  position: relative;
  overflow: hidden;
  animation: rise 0.7s ease both;
}

.rate-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(224, 122, 95, 0.18), transparent 45%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.rate-card:hover::after {
  opacity: 1;
}

.pair {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.pair span {
  font-size: 0.95rem;
}

.rate-value {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  margin: 14px 0 6px;
}

.rate-sub {
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.rate-meta {
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--muted);
}

.card-actions {
  margin-top: 14px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-bottom: 20px;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

label,
.control-label {
  font-size: 0.9rem;
  color: var(--muted);
}

select {
  font-family: inherit;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
}

.range-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.range-buttons button {
  background: rgba(255, 255, 255, 0.75);
  border-color: var(--border);
  color: var(--accent-strong);
}

.range-buttons button.active {
  background: var(--accent-soft);
  border-color: rgba(224, 122, 95, 0.6);
  color: var(--accent-strong);
  box-shadow: 0 12px 22px rgba(224, 122, 95, 0.2);
}

.chart-card {
  background: rgba(255, 255, 255, 0.82);
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--border);
  position: relative;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.chart-title {
  font-size: 1.3rem;
  font-weight: 600;
}

.chart-meta {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 4px;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(224, 122, 95, 0.18);
}

.chart-wrap {
  height: 360px;
  width: 100%;
}

canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-status {
  font-size: 0.85rem;
  color: var(--accent-strong);
  min-height: 20px;
  margin-top: 8px;
}

.site-footer {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--muted);
  padding: 24px 6vw 40px;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(16, 33, 42, 0.22);
}

.site-footer a:hover {
  color: var(--accent-strong);
  border-bottom-color: var(--accent-strong);
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 900px) {
  .hero {
    padding: 72px 6vw 48px;
  }

  .panel {
    padding: 24px;
  }

  .chart-wrap {
    height: 300px;
  }
}

@media (max-width: 600px) {
  .hero-top {
    align-items: flex-start;
  }

  .panel-header {
    align-items: flex-start;
  }

  .panel-actions {
    width: 100%;
    justify-content: flex-start;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}