:root {
  color-scheme: dark;
  --ink: #0b0c0d;
  --ink-deep: #08090a;
  --ink-raised: #141619;
  --ink-fill: #1c1f23;
  --paper: #f4f4f1;
  --slate: #93969c;
  --slate-soft: #b9bcc2;
  --lime: #c7f53d;
  --lime-soft: #ddff86;
  --lime-deep: #4e6b00;
  --rose: #ff8fb1;
  --line: rgba(255, 255, 255, 0.08);
  --radius-large: 32px;
  --radius-card: 24px;
  --radius-pill: 999px;
  --page: 1120px;
  --document: 760px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--ink-deep);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--lime);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
  border-radius: 4px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(100% - 48px, var(--page));
  margin: 0 auto;
  padding: 28px 0;
}

.wordmark {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 4px;
}

.site-nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--slate);
}

.site-nav a[aria-current="page"] {
  color: var(--lime);
}

/* 首页 */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 64px;
  width: min(100% - 48px, var(--page));
  margin: 0 auto;
  padding: 56px 0 96px;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--lime);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.12;
  letter-spacing: -1px;
  font-weight: 800;
}

.lede {
  max-width: 34em;
  margin: 28px 0 0;
  color: var(--slate-soft);
  font-size: 18px;
}

.hero-note {
  margin: 32px 0 0;
  padding: 10px 20px;
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--slate);
  font-size: 14px;
}

.avatar-wall {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 20px;
  background: var(--ink-raised);
  border-radius: var(--radius-large);
}

.tile {
  display: block;
  aspect-ratio: 3 / 4;
  border-radius: 20px;
  background: linear-gradient(150deg, #2a2d31, #141619);
  filter: blur(6px);
  opacity: 0.55;
  transform: scale(1);
}

.tile-1 { background: linear-gradient(150deg, #4a5a6b, #1d2329); filter: blur(7px); }
.tile-2 { background: linear-gradient(150deg, #6b5b4a, #241f1a); filter: blur(4px); opacity: 0.7; }
.tile-3 { background: linear-gradient(150deg, #c7f53d, #4e6b00); filter: blur(9px); opacity: 0.5; }
.tile-4 { background: linear-gradient(150deg, #5b4a6b, #201a24); filter: blur(6px); }
.tile-5 { background: linear-gradient(150deg, #ff8fb1, #6b3a4a); filter: blur(5px); opacity: 0.65; }
.tile-6 { background: linear-gradient(150deg, #4a6b5b, #1a2420); filter: blur(8px); }
.tile-7 { background: linear-gradient(150deg, #6b6b4a, #24241a); filter: blur(3px); opacity: 0.8; }
.tile-8 { background: linear-gradient(150deg, #4a5b6b, #1a2024); filter: blur(7px); }
.tile-9 { background: linear-gradient(150deg, #6b4a5b, #241a20); filter: blur(6px); opacity: 0.6; }
.tile-10 { background: linear-gradient(150deg, #d6d6cf, #5e646c); filter: blur(2px); opacity: 0.85; }
.tile-11 { background: linear-gradient(150deg, #4a6b6b, #1a2424); filter: blur(8px); }
.tile-12 { background: linear-gradient(150deg, #c7f53d, #6b8a00); filter: blur(10px); opacity: 0.4; }

.steps,
.principles,
.age-gate {
  width: min(100% - 48px, var(--page));
  margin: 0 auto;
}

.steps {
  padding: 48px 0 96px;
  border-top: 1px solid var(--line);
}

.steps h2,
.principles h2,
.age-gate h2 {
  margin: 0 0 40px;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step {
  padding: 32px;
  background: var(--ink-raised);
  border-radius: var(--radius-card);
}

.step-index {
  display: block;
  margin-bottom: 40px;
  color: var(--lime);
  font-size: 13px;
  letter-spacing: 2px;
}

.step h3,
.principle h3 {
  margin: 0 0 12px;
  font-size: 20px;
  line-height: 1.35;
}

.step p,
.principle p,
.age-gate p {
  margin: 0;
  color: var(--slate-soft);
}

.principles {
  padding: 64px 0 96px;
  border-top: 1px solid var(--line);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.principle {
  padding: 8px 0 0;
}

.age-gate {
  margin-bottom: 96px;
  padding: 40px;
  background: var(--ink-raised);
  border-radius: var(--radius-large);
}

.age-gate h2 {
  margin-bottom: 16px;
  font-size: clamp(22px, 2.6vw, 30px);
}

/* 协议页 */

.document {
  width: min(100% - 48px, var(--document));
  margin: 0 auto;
  padding: 32px 0 96px;
}

.document-card {
  background: var(--ink-raised);
  border-radius: var(--radius-large);
  padding: clamp(28px, 5vw, 64px);
}

.document-kicker {
  margin: 0 0 12px;
  color: var(--lime);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.document h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.document-meta {
  margin: 16px 0 0;
  color: var(--slate);
  font-size: 14px;
}

.toc {
  margin: 40px 0 48px;
  padding: 24px 28px;
  background: var(--ink-fill);
  border-radius: var(--radius-card);
}

.toc-title {
  margin: 0 0 12px;
  color: var(--slate);
  font-size: 13px;
  letter-spacing: 2px;
}

.toc ol {
  margin: 0;
  padding-left: 20px;
  color: var(--slate-soft);
  columns: 2;
  column-gap: 32px;
}

.toc li {
  margin: 6px 0;
  break-inside: avoid;
}

.document section {
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.document section + section {
  margin-top: 40px;
}

.document h2 {
  margin: 24px 0 16px;
  font-size: 22px;
  line-height: 1.35;
}

.document p,
.document li {
  color: var(--slate-soft);
}

.document ul {
  margin: 0;
  padding-left: 22px;
}

.document li {
  margin: 10px 0;
}

.document strong {
  color: var(--paper);
  font-weight: 600;
}

.document a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 页脚 */

.site-footer {
  width: min(100% - 48px, var(--page));
  margin: 0 auto;
  padding: 40px 0 64px;
  border-top: 1px solid var(--line);
  color: var(--slate);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
}

.footer-org,
.footer-copy {
  margin: 8px 0 0;
}

/* 响应式 */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-bottom: 72px;
  }

  .avatar-wall {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 8px;
    padding: 12px;
    border-radius: var(--radius-card);
  }

  .tile {
    border-radius: 12px;
  }

  .step-list,
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .step-index {
    margin-bottom: 24px;
  }

  .toc ol {
    columns: 1;
  }
}

@media (max-width: 600px) {
  .site-header,
  .hero,
  .steps,
  .principles,
  .age-gate,
  .document,
  .site-footer {
    width: calc(100% - 40px);
  }

  .site-nav {
    gap: 16px;
  }

  .hero {
    padding-top: 32px;
  }

  .age-gate {
    padding: 28px;
  }

  .document-card {
    padding: 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}

@media print {
  body {
    background: #fff;
    color: #111;
  }

  .site-header,
  .site-footer,
  .toc {
    display: none;
  }

  .document-card {
    background: #fff;
  }

  .document p,
  .document li {
    color: #333;
  }
}