:root {
  --bg: #f4f7ff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #1f2a44;
  --muted: #64708b;
  --line: rgba(91, 110, 145, 0.14);
  --blue: #5574ff;
  --cyan: #61d9ff;
  --orange: #ff8b59;
  --red: #ff6860;
  --yellow: #ffcb65;
  --shadow: 0 18px 44px rgba(38, 65, 132, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 139, 89, 0.22), transparent 28%),
    radial-gradient(circle at bottom right, rgba(97, 217, 255, 0.22), transparent 30%),
    linear-gradient(180deg, #fdfefe 0%, var(--bg) 42%, #eef4ff 100%);
  line-height: 1.7;
}

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

.page-shell {
  width: min(var(--max-width), calc(100vw - 32px));
  margin: 0 auto;
}

.hero {
  position: relative;
  overflow: hidden;
  margin: 20px auto 24px;
  padding: 28px;
  border-radius: 32px;
  background: linear-gradient(135deg, #ff7d62 0%, #7a7df6 48%, #4370dd 100%);
  color: #fff;
  box-shadow: 0 22px 54px rgba(58, 88, 170, 0.24);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.hero::before {
  width: 240px;
  height: 240px;
  top: -96px;
  right: -64px;
}

.hero::after {
  width: 180px;
  height: 180px;
  bottom: -72px;
  left: -56px;
}

.hero-topbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: space-between;
  margin-bottom: 22px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  backdrop-filter: blur(14px);
}

.hero h1 {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.08;
}

.hero p {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 700px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 16px;
}

.hero-nav {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.hero-nav a,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  backdrop-filter: blur(14px);
}

.content-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 22px;
  margin-bottom: 40px;
}

.sidebar,
.content-card,
.nav-card,
.footer-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.sidebar {
  position: sticky;
  top: 20px;
  align-self: start;
  padding: 20px;
  border-radius: var(--radius-xl);
}

.sidebar h2,
.content-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.25;
}

.sidebar p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar nav a {
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
  background: rgba(85, 116, 255, 0.04);
  transition: 0.2s ease;
}

.sidebar nav a:hover {
  color: var(--blue);
  background: rgba(85, 116, 255, 0.1);
}

.content-card {
  padding: 26px;
  border-radius: 30px;
}

.content-card + .content-card {
  margin-top: 18px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  margin-bottom: 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(255, 139, 89, 0.16), rgba(85, 116, 255, 0.12));
  color: var(--blue);
}

.content-card h3 {
  margin: 24px 0 10px;
  font-size: 18px;
}

.content-card p,
.content-card li {
  color: #36435d;
}

.content-card ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

.content-card li + li {
  margin-top: 8px;
}

.notice,
.contact-list,
.faq-list {
  display: grid;
  gap: 14px;
}

.mini-card {
  padding: 18px;
  border-radius: 20px;
  background: var(--surface-strong);
  border: 1px solid rgba(91, 110, 145, 0.09);
}

.mini-card h4 {
  margin: 0 0 8px;
  font-size: 16px;
}

.mini-card p,
.mini-card li {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.mini-card ul {
  margin-top: 10px;
  padding-left: 18px;
}

.footer-card {
  margin: 0 auto 32px;
  padding: 20px 24px;
  border-radius: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-meta {
  color: var(--muted);
  font-size: 14px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--orange), var(--blue));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 14px 26px rgba(85, 116, 255, 0.18);
}

.inline-code {
  padding: 3px 7px;
  border-radius: 8px;
  background: rgba(85, 116, 255, 0.08);
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
}

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

  .sidebar {
    position: static;
  }

  .hero {
    padding: 24px;
  }
}

@media (max-width: 600px) {
  .page-shell {
    width: min(var(--max-width), calc(100vw - 20px));
  }

  .hero,
  .content-card,
  .sidebar,
  .footer-card {
    border-radius: 24px;
  }

  .content-card {
    padding: 20px;
  }
}