:root {
  --bg: #f6efe5;
  --bg-deep: #ead8be;
  --paper: rgba(255, 250, 242, 0.88);
  --ink: #1d2935;
  --muted: #5f6c79;
  --line: rgba(29, 41, 53, 0.12);
  --accent: #145f66;
  --accent-strong: #0f4e54;
  --warm: #d27243;
  --shadow: 0 20px 60px rgba(38, 43, 53, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(210, 114, 67, 0.28), transparent 28%),
    radial-gradient(circle at top right, rgba(20, 95, 102, 0.24), transparent 30%),
    linear-gradient(160deg, #faf4ec 0%, var(--bg) 58%, var(--bg-deep) 100%);
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.page-glow {
  position: fixed;
  width: 26rem;
  height: 26rem;
  border-radius: 999px;
  filter: blur(90px);
  opacity: 0.35;
  pointer-events: none;
}

.page-glow-left {
  top: -8rem;
  left: -8rem;
  background: rgba(210, 114, 67, 0.48);
}

.page-glow-right {
  right: -6rem;
  bottom: -6rem;
  background: rgba(20, 95, 102, 0.4);
}

.layout {
  position: relative;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 56px;
}

.hero-card,
.chat-card,
.info-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-card {
  padding: 36px;
}

.eyebrow,
.card-kicker,
.point-label {
  margin: 0 0 10px;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 0.98;
}

.hero-copy {
  max-width: 820px;
  margin-bottom: 14px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-copy-cn {
  margin-bottom: 24px;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.point-card {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(29, 41, 53, 0.08);
}

.point-card strong {
  display: block;
  font-size: 1rem;
}

.hero-actions,
.info-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(20, 95, 102, 0.2);
  color: var(--accent-strong);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.62);
  transition: transform 0.2s ease, background 0.2s ease;
}

.ghost-link:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.9);
}

.demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.95fr);
  gap: 18px;
  margin-top: 20px;
}

.chat-card,
.info-card {
  padding: 28px;
}

.card-header,
.response-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.status-badge,
.response-note {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--accent-strong);
  background: rgba(20, 95, 102, 0.1);
}

.suggestion-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 22px;
}

.suggestion-chip {
  padding: 10px 14px;
  border: 0;
  border-radius: 999px;
  background: rgba(210, 114, 67, 0.14);
  color: #8a4c2b;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.suggestion-chip:hover {
  transform: translateY(-1px);
  background: rgba(210, 114, 67, 0.24);
}

.chat-form {
  display: grid;
  gap: 12px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.field-label {
  font-weight: 600;
}

textarea,
input,
select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(29, 41, 53, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
  font: inherit;
}

textarea:focus,
input:focus,
select:focus {
  outline: 2px solid rgba(20, 95, 102, 0.18);
  border-color: rgba(20, 95, 102, 0.32);
}

.field-helper {
  margin: 8px 2px 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

.submit-button {
  margin-top: 6px;
  min-height: 48px;
  border: 0;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #fdfbf7;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.response-panel {
  margin-top: 22px;
  padding: 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(29, 41, 53, 0.08);
}

.response-text {
  min-height: 156px;
  line-height: 1.8;
  color: var(--ink);
  white-space: pre-wrap;
}

.response-meta,
.info-card p,
.info-list {
  color: var(--muted);
  line-height: 1.8;
}

.info-list {
  padding-left: 20px;
  margin: 14px 0 18px;
}

.runtime-info {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 18px;
}

.runtime-item {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(29, 41, 53, 0.08);
}

.runtime-item-wide {
  grid-column: 1 / -1;
}

.runtime-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.runtime-item strong {
  display: block;
  overflow-wrap: anywhere;
}

.preview-image {
  width: 100%;
  margin: 8px 0 18px;
  border-radius: 20px;
  border: 1px solid rgba(29, 41, 53, 0.08);
  box-shadow: 0 12px 30px rgba(38, 43, 53, 0.08);
}

@media (max-width: 900px) {
  .field-grid,
  .hero-points,
  .demo-grid,
  .runtime-info {
    grid-template-columns: 1fr;
  }

  .layout {
    width: min(100% - 20px, 720px);
    padding-top: 18px;
  }

  .hero-card,
  .chat-card,
  .info-card {
    padding: 22px;
    border-radius: 24px;
  }

  h1 {
    font-size: 2.6rem;
  }
}