:root {
  --ink: #0f2436;
  --muted: #4d667a;
  --line: #cde3ef;
  --paper: #ffffff;
  --leaf-1: #e9f8ef;
  --leaf-2: #95dfad;
  --leaf-3: #2f9f66;
  --sky: #9cccf0;
  --shadow: 0 16px 36px rgba(12, 44, 68, 0.11);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 0%, rgba(133, 192, 233, 0.38), transparent 34%),
    radial-gradient(circle at 8% 9%, rgba(128, 217, 162, 0.3), transparent 38%),
    linear-gradient(162deg, #eef8ff 0%, #f7fcff 50%, #f0fbf4 100%);
  background-image:
    radial-gradient(circle at 82% 0%, rgba(133, 192, 233, 0.38), transparent 34%),
    radial-gradient(circle at 8% 9%, rgba(128, 217, 162, 0.3), transparent 38%),
    linear-gradient(162deg, #eef8ff 0%, #f7fcff 50%, #f0fbf4 100%),
    repeating-linear-gradient(
      0deg,
      rgba(15, 36, 54, 0.03) 0 1px,
      transparent 1px 28px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(15, 36, 54, 0.03) 0 1px,
      transparent 1px 28px
    );
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

.container {
  width: min(1080px, calc(100vw - 36px));
  margin: 0 auto;
}

.stack {
  display: grid;
  gap: 18px;
  margin-bottom: 34px;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  pointer-events: none;
  z-index: -1;
  filter: blur(10px);
}

.bg-orb--a {
  width: 330px;
  height: 330px;
  top: -80px;
  right: -90px;
  background: rgba(62, 162, 222, 0.2);
  animation: drift-a 10s ease-in-out infinite;
}

.bg-orb--b {
  width: 230px;
  height: 230px;
  bottom: 40px;
  left: -40px;
  background: rgba(79, 181, 123, 0.2);
  animation: drift-b 12s ease-in-out infinite;
}

@keyframes drift-a {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(18px); }
}

@keyframes drift-b {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(16px); }
}

.hero {
  padding: 36px 0 18px;
}

.hero__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.hero__brand img {
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.tag {
  margin: 0;
  color: #2d7fb0;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

h1 {
  margin: 4px 0 0;
  font-size: clamp(2.05rem, 4.6vw, 3.2rem);
  line-height: 1.05;
}

.hero__intro {
  margin: 14px 0 0;
  font-size: 1.02rem;
  line-height: 1.74;
  color: var(--muted);
  max-width: 760px;
}

.hero__chips {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hero__chips span {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid #b7d8ea;
  background: rgba(255, 255, 255, 0.82);
  font-weight: 600;
  font-size: 0.9rem;
}

.knowledge-strip {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.knowledge-strip article {
  border-radius: 14px;
  border: 1px solid #bfdeef;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94) 0%, #f1f9ff 100%);
  padding: 12px 14px;
}

.knowledge-strip h3 {
  margin: 0;
  color: #2572a1;
  font-size: 0.92rem;
}

.knowledge-strip p {
  margin-top: 6px;
  font-size: 0.9rem;
  line-height: 1.55;
}

.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, #ffffff 100%);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 24px;
}

h2 {
  margin: 0 0 16px;
  font-size: 1.44rem;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

p {
  margin: 0;
  line-height: 1.72;
  color: #2f4658;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid--features,
.grid--open {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid--audience {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid article {
  border: 1px solid #d2e5f1;
  border-radius: 16px;
  background: linear-gradient(180deg, #f8fcff, #f4fbff);
  padding: 16px;
}

.panel--open .grid article {
  background: linear-gradient(180deg, #f8feff, #f2fbf8);
}

.scene {
  margin-top: 8px;
  color: #4f7082;
  font-size: 0.92rem;
}

.footer {
  padding: 4px 0 36px;
}

.footer p {
  text-align: center;
  color: #597082;
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .container {
    width: min(1080px, calc(100vw - 22px));
  }

  .hero {
    padding-top: 24px;
  }

  .panel {
    border-radius: 18px;
    padding: 18px;
  }

  .hero__brand img {
    width: 60px;
    height: 60px;
  }
}