:root {
  --bg: #f5f7fc;
  --card: rgba(255, 255, 255, 0.8);
  --card-strong: rgba(255, 255, 255, 0.94);
  --line: rgba(142, 156, 190, 0.24);
  --text: #121a33;
  --muted: #5e6987;
  --accent: #f25b4c;
  --accent-2: #ff9f6e;
  --dark: #181f3f;
  --dark-2: #23315f;
  --shadow: 0 22px 56px rgba(24, 31, 63, 0.1);
  --shadow-soft: 0 10px 24px rgba(24, 31, 63, 0.06);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 12%, rgba(255, 202, 176, 0.35), transparent 24%),
    radial-gradient(circle at 86% 14%, rgba(176, 204, 255, 0.25), transparent 24%),
    linear-gradient(180deg, #fffaf7 0%, #f6f8fd 46%, #f1f5fc 100%);
}
a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  padding: 9px;
  background: linear-gradient(180deg, #202a60 0%, #1b244f 100%);
  box-shadow: 0 12px 24px rgba(32, 42, 96, 0.18);
}
.brand-name {
  font-size: 2.25rem;
  line-height: 0.98;
  font-weight: 900;
  letter-spacing: -0.05em;
}
.brand-tag {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.92rem;
}
.nav {
  display: flex;
  gap: 24px;
  color: #44506c;
  font-size: 0.98rem;
}
.landing-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px 60px;
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 34px;
  align-items: center;
  padding-top: 18px;
}
.hero-kicker {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 233, 223, 0.92);
  color: #b84a43;
  border: 1px solid rgba(242, 91, 76, 0.12);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}
.hero-left h1 {
  margin: 18px 0 14px;
  font-size: clamp(3.1rem, 6vw, 5.1rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}
.hero-left p {
  margin: 0;
  max-width: 560px;
  color: #43506d;
  font-size: 1.1rem;
  line-height: 1.6;
}
.hero-actions {
  margin: 24px 0 18px;
  display: flex;
  gap: 12px;
}
.btn {
  min-width: 112px;
  padding: 12px 18px;
  border-radius: 16px;
  font-size: 0.98rem;
  font-weight: 800;
  text-align: center;
}
.btn-primary {
  color: #fff;
  background: linear-gradient(180deg, #ff7366 0%, #ee574a 100%);
  box-shadow: 0 14px 26px rgba(242, 91, 76, 0.22);
}
.btn-ghost {
  color: #283552;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(142, 156, 190, 0.22);
  box-shadow: var(--shadow-soft);
}
.hero-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.hero-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #4f5b78;
  font-size: 0.96rem;
}
.hero-points li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}
.hero-right::before {
  content: "";
  position: absolute;
  inset: 18px -10px -18px 40px;
  border-radius: 36px;
  background: linear-gradient(145deg, rgba(255, 153, 112, 0.14), rgba(92, 128, 255, 0.14));
  filter: blur(22px);
  z-index: 0;
}
.hero-right { position: relative; }
.mock-window {
  position: relative;
  z-index: 1;
  border-radius: 28px;
  padding: 16px;
  background: linear-gradient(145deg, var(--dark) 0%, var(--dark-2) 100%);
  box-shadow: 0 24px 56px rgba(24, 31, 63, 0.2);
}
.window-dots {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.24);
}
.mock-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.mock-card {
  border-radius: 22px;
  padding: 18px;
  border: 1px solid rgba(180, 193, 227, 0.14);
  background: linear-gradient(180deg, rgba(74, 84, 118, 0.6), rgba(53, 64, 98, 0.56));
  color: #f3f7ff;
}
.mock-card small {
  color: #b9c5dc;
  font-size: 0.85rem;
}
.mock-card h3 {
  margin: 12px 0 8px;
  font-size: clamp(1.55rem, 3vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
}
.mock-card p {
  margin: 0;
  color: #dce5f7;
  font-size: 0.94rem;
  line-height: 1.55;
}
.mock-card-hot {
  background: linear-gradient(145deg, rgba(156, 69, 80, 0.72), rgba(67, 79, 120, 0.66));
}
.mock-card-wide {
  grid-column: 1 / -1;
  background: linear-gradient(145deg, rgba(82, 96, 156, 0.7), rgba(58, 74, 125, 0.66));
}
.info-section {
  margin-top: 28px;
  padding: 24px;
  border-radius: 26px;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}
.info-section-dark {
  color: #f4f7ff;
  background: linear-gradient(145deg, #1b2347 0%, #212d56 100%);
  border-color: rgba(255, 255, 255, 0.07);
}
.section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}
.section-head span {
  display: inline-flex;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(242, 91, 76, 0.08);
  color: #c24e45;
  font-size: 0.82rem;
  font-weight: 700;
}
.info-section-dark .section-head span {
  background: rgba(255, 255, 255, 0.08);
  color: #ffb2a9;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(1.55rem, 2.4vw, 2.2rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}
.feature-grid,
.scene-grid,
.faq-list,
.plan-list {
  display: grid;
  gap: 14px;
}
.feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.scene-grid,
.plan-list,
.faq-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.feature-card,
.scene-card,
.faq-item,
.plan-item {
  border-radius: 20px;
  padding: 18px;
  background: var(--card-strong);
  border: 1px solid rgba(142, 156, 190, 0.16);
  box-shadow: var(--shadow-soft);
}
.feature-card h3,
.scene-card h3,
.faq-item h3,
.plan-item strong {
  display: block;
  margin: 0 0 8px;
  font-size: 1.02rem;
  line-height: 1.35;
}
.feature-card p,
.scene-card p,
.faq-item p,
.plan-item p {
  margin: 0;
  color: #57637f;
  line-height: 1.6;
  font-size: 0.92rem;
}
.info-section-dark .scene-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}
.info-section-dark .scene-card h3,
.info-section-dark .scene-card p { color: #edf3ff; }
@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; }
  .feature-grid,
  .scene-grid,
  .plan-list,
  .faq-list { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .site-header {
    position: static;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  .nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    font-size: 0.92rem;
  }
  .brand-logo { width: 56px; height: 56px; }
  .brand-name { font-size: 2rem; }
  .hero-left h1 { font-size: 2.7rem; }
  .hero-left p { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .mock-grid,
  .feature-grid,
  .scene-grid,
  .plan-list,
  .faq-list { grid-template-columns: 1fr; }
  .info-section { padding: 20px; }
}