/* [IN]: HTML pages for memou.org */
/* [OUT]: Shared website style system */
/* [POS]: Brand look, responsive layout, and subtle motion */
/* Protocol: When updating me, sync this header + parent folder's .folder.md */
/* 协议：更新本文件时，同步更新此头注释及所属文件夹的 .folder.md */

:root {
  --bg: #f4f8f7;
  --bg-strong: #e8f2ef;
  --card: #ffffff;
  --ink: #0d1a1f;
  --muted: #4c5a5f;
  --line: #d6e0dc;
  --brand: #0e7a6d;
  --brand-strong: #075a50;
  --accent: #ee8c2f;
  --radius: 18px;
  --shadow: 0 14px 40px rgba(9, 31, 38, 0.08);
  --max: 1100px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% -10%, #c7f0e9 0%, rgba(199, 240, 233, 0) 40%),
    radial-gradient(circle at 100% 0%, #ffe4cc 0%, rgba(255, 228, 204, 0) 35%),
    var(--bg);
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(244, 248, 247, 0.8);
  border-bottom: 1px solid rgba(13, 26, 31, 0.06);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--brand-strong);
}

.hero {
  padding: 88px 0 48px;
}

.hero-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: 1.2fr 1fr;
  align-items: stretch;
}

.hero-copy,
.hero-card,
.panel,
.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 34px;
  animation: rise 700ms ease-out both;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  line-height: 1.12;
}

.lead {
  color: var(--muted);
  margin: 0;
}

.cta-row {
  display: flex;
  gap: 12px;
  margin-top: 26px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 10px 18px;
  font-weight: 700;
}

.btn.primary {
  background: linear-gradient(90deg, var(--brand) 0%, #179281 100%);
  color: #ffffff;
}

.btn.secondary {
  border-color: var(--line);
  color: var(--ink);
  background: #ffffff;
}

.hero-card {
  padding: 26px;
  animation: rise 850ms ease-out both;
}

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

.hero-card ul {
  margin: 0;
  padding-left: 18px;
}

.hero-card li {
  margin: 8px 0;
}

.section {
  padding: 24px 0 56px;
}

.section h2,
.section h1 {
  margin-top: 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  padding: 20px;
}

.panel h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.page {
  padding: 44px 0 62px;
}

.page .intro {
  color: var(--muted);
  margin-bottom: 20px;
}

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

.faq-item {
  padding: 18px;
  animation: rise 700ms ease-out both;
}

.faq-item h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

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

.legal section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.legal h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.legal p,
.legal li {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid rgba(13, 26, 31, 0.08);
  padding: 24px 0 30px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer .inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--brand-strong);
}

.note {
  margin-top: 16px;
  font-size: 0.95rem;
  color: var(--muted);
}

.updated {
  font-weight: 600;
  color: var(--brand-strong);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 940px) {
  .hero-grid,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 64px;
  }
}