:root {
  --bg-1: #f5faff;
  --bg-2: #ecf5ff;
  --ink-1: #0f2a43;
  --ink-2: #37556f;
  --line: rgba(24, 77, 120, 0.18);
  --card: rgba(255, 255, 255, 0.82);
  --accent: #0f766e;
  --accent-2: #f97316;
  --shadow: 0 18px 48px rgba(15, 42, 67, 0.12);
}

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

html,
body {
  min-height: 100%;
}

body {
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  color: var(--ink-1);
  background: linear-gradient(160deg, var(--bg-1), var(--bg-2));
  line-height: 1.75;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 999px;
  filter: blur(60px);
  z-index: -2;
  pointer-events: none;
}

body::before {
  top: -120px;
  left: -100px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(15, 118, 110, 0.24), transparent 70%);
  animation: driftA 14s ease-in-out infinite;
}

body::after {
  right: -120px;
  bottom: -140px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.25), transparent 70%);
  animation: driftB 18s ease-in-out infinite;
}

@keyframes driftA {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(40px, 20px);
  }
}

@keyframes driftB {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-30px, -16px);
  }
}

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

ul {
  list-style: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(245, 250, 255, 0.7);
  border-bottom: 1px solid rgba(18, 67, 108, 0.1);
}

.nav-wrap {
  width: min(1120px, 92%);
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--ink-2);
  transition: 0.25s ease;
}

.nav-list a:hover,
.nav-list a.is-active {
  color: #ffffff;
  background: linear-gradient(120deg, var(--accent), #0d9488);
  box-shadow: 0 8px 20px rgba(13, 148, 136, 0.32);
}

.page {
  width: min(1120px, 92%);
  margin: 26px auto 72px;
}

.hero {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.95), rgba(246, 252, 255, 0.8));
  box-shadow: var(--shadow);
  padding: clamp(26px, 4.5vw, 52px);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  top: -80px;
  right: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 118, 110, 0.18), transparent 68%);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent);
}

h1 {
  font-size: clamp(1.8rem, 4.8vw, 3rem);
  line-height: 1.2;
  margin-bottom: 12px;
}

.hero p {
  max-width: 760px;
  color: var(--ink-2);
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: 0.25s ease;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #0d9488);
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.34);
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--ink-1);
  border-color: rgba(18, 67, 108, 0.2);
  background: rgba(255, 255, 255, 0.7);
}

.btn-ghost:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.main-grid {
  margin-top: 22px;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.card {
  grid-column: span 12;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
  padding: clamp(18px, 2.3vw, 26px);
}

.card h2 {
  font-size: clamp(1.18rem, 2.2vw, 1.5rem);
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.03rem;
  margin: 16px 0 8px;
}

.card p,
.card li {
  color: var(--ink-2);
}

.card ul {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.card li {
  padding-left: 18px;
  position: relative;
}

.card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}

.split {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.note {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(15, 118, 110, 0.1);
  border: 1px solid rgba(15, 118, 110, 0.2);
  font-size: 0.95rem;
}

.footer {
  width: min(1120px, 92%);
  margin: 0 auto 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(18, 67, 108, 0.14);
  color: #5a738a;
  font-size: 0.9rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  text-align: center;
}

.footer a {
  color: #2f5978;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: transform 0.75s cubic-bezier(0.2, 0.72, 0.22, 1), opacity 0.75s ease;
  transition-delay: var(--delay, 0s);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .nav-wrap {
    padding: 12px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    border-radius: 18px;
  }

  .card {
    border-radius: 16px;
  }
}