:root {
  --bg: #fdf8f0;
  --panel: #ffffff;
  --accent: #f06543;
  --accent-dark: #d44c2d;
  --text: #2f2a2a;
  --muted: #7a6f63;
  --line: #e6dccf;
  --shadow: 0 20px 45px rgba(240, 101, 67, 0.15);
  font-size: 16px;
}

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

body {
  font-family: "Source Sans Pro", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
}

.all-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 4vw;
  background: rgba(253, 248, 240, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-dot {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 30%, #ffd7c2, var(--accent));
}

.logo-wrap strong {
  display: block;
  font-weight: 700;
}

.logo-wrap span {
  font-size: 0.85rem;
  color: var(--muted);
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--accent);
}

.header-cta {
  padding: 0.65rem 1.5rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 4rem 4vw;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin: 1rem 0;
}

.badge {
  font-size: 0.85rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-metrics {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  list-style: none;
  padding: 0;
}

.hero-metrics strong {
  display: block;
  font-size: 1.8rem;
  color: var(--accent);
}

.hero-tags {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.hero-tags div {
  padding: 1rem;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  text-align: center;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.section-head {
  text-align: center;
  margin-bottom: 2rem;
}

section {
  padding: 3.5rem 4vw;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.system-grid article {
  background: var(--panel);
  border-radius: 18px;
  padding: 1.5rem;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.system-grid h3 {
  color: var(--accent-dark);
  margin-bottom: 0.8rem;
}

.system-grid ul {
  list-style: none;
  margin-top: 1rem;
  color: var(--muted);
  padding-left: 0;
}

.compare-table {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.compare-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.5fr;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.compare-header {
  background: #fff3eb;
  font-weight: 700;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.scene-card {
  border-radius: 18px;
  padding: 1.6rem;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.scene-card h3 {
  color: var(--accent-dark);
}

.scene-card ul {
  list-style: none;
  margin-top: 1rem;
  color: var(--muted);
}

.contact {
  padding-bottom: 4rem;
}

.contact-card {
  border-radius: 24px;
  padding: 2.5rem;
  background: linear-gradient(135deg, rgba(240, 101, 67, 0.1), rgba(253, 248, 240, 0.9));
  border: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
  box-shadow: var(--shadow);
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.contact-actions a {
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 600;
}

.all-footer {
  padding: 1.5rem;
  text-align: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 900px) {
  nav {
    display: none;
  }

  .header-cta {
    display: none;
  }

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

@media (max-width: 640px) {
  .hero-metrics {
    flex-direction: column;
  }
}