:root {
  --bg: #f4f7ff;
  --surface: #ffffff;
  --text: #1f2a44;
  --muted: #62708f;
  --primary: #4a63ff;
  --primary-dark: #384ed4;
  --border: #dbe3ff;
  --shadow: 0 14px 40px rgba(74, 99, 255, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(140deg, #4a63ff, #7085ff);
}

.logo-text {
  font-size: 1.15rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--muted);
  font-weight: 500;
}

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

.menu-btn {
  display: none;
  border: none;
  background: transparent;
  font-size: 1.35rem;
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  padding: 0.78rem 1.2rem;
  font-weight: 700;
  transition: 0.2s ease;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-small {
  padding: 0.6rem 0.95rem;
  font-size: 0.9rem;
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-ghost:hover {
  color: #fff;
}

.btn-block {
  width: 100%;
}

.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  gap: 1.8rem;
  grid-template-columns: 1.35fr 1fr;
}

.eyebrow {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.85rem, 4vw, 2.9rem);
  line-height: 1.22;
}

.subtitle {
  margin-top: 1rem;
  color: var(--muted);
}

.hero-actions {
  margin: 1.4rem 0 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.hero-stats li {
  display: grid;
  gap: 0.25rem;
}

.hero-stats strong {
  font-size: 1.3rem;
}

.hero-stats span {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-card {
  background: linear-gradient(170deg, #fff 0%, #eef2ff 100%);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.45rem 1.4rem;
  box-shadow: var(--shadow);
}

.hero-card h2 {
  margin-top: 0;
}

.hero-card p {
  color: var(--muted);
}

.hero-card ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.section {
  padding: 4rem 0;
}

.section h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.section-desc {
  margin: 0 0 1.6rem;
  color: var(--muted);
}

.section-alt {
  background: #eef3ff;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.15rem;
}

.card h3 {
  margin-top: 0;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
}

.scene-list {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.scene-item {
  border-left: 4px solid var(--primary);
  padding: 0.5rem 0 0.5rem 1rem;
}

.scene-item h3 {
  margin: 0;
}

.scene-item p {
  margin: 0.4rem 0 0;
  color: var(--muted);
}

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

.price-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.2rem;
}

.price-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow);
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.45rem;
  font-size: 0.76rem;
  border-radius: 999px;
  color: #fff;
  background: var(--primary);
}

.price {
  margin: 0.8rem 0;
  font-size: 1.8rem;
  font-weight: 800;
}

.price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--muted);
}

.price-card ul {
  padding-left: 1.1rem;
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

.faq-list details {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-list p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr 1fr;
}

.form {
  display: grid;
  gap: 0.8rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
}

.form label {
  display: grid;
  gap: 0.35rem;
  font-weight: 500;
}

.form input,
.form textarea {
  width: 100%;
  border: 1px solid #cad4ff;
  border-radius: 10px;
  padding: 0.66rem 0.7rem;
  font: inherit;
}

.form input:focus,
.form textarea:focus {
  border-color: var(--primary);
  outline: 2px solid rgba(74, 99, 255, 0.15);
}

.form-tip {
  margin: 0.2rem 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 1rem 0;
}

.footer-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .cards,
  .pricing {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .menu-btn {
    display: inline-block;
  }

  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    padding: 0.9rem 1rem 1rem;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
    pointer-events: none;
    transition: 0.2s ease;
  }

  .nav.open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-wrap > .btn-small {
    display: none;
  }

  .cards,
  .pricing,
  .scene-list {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }
}