/* AIRole · 与 App 夜色盘一致 */
:root {
  --night: #110d16;
  --night-mid: #241526;
  --night-rose: #4a2438;
  --night-card: #1c1624;
  --accent: #c9a6ff;
  --lilac: #c9a6ff;
  --peach: #ffc4a8;
  --moon: #ffd7c2;
  --blush: #d4a0ae;
  --ink: rgba(255, 247, 242, 0.92);
  --body: rgba(255, 215, 194, 0.78);
  --muted: rgba(255, 215, 194, 0.46);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(201, 166, 255, 0.28);
  --header-h: 68px;
  --shell: 1080px;
  --doc: 920px;
  --gutter: clamp(18px, 4vw, 36px);
  --radius: 18px;
  --radius-lg: 24px;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Inter", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--body);
  background: var(--night);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(201, 166, 255, 0.42);
  color: #fff;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

img {
  max-width: 100%;
  display: block;
}

.sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 520px at 88% -8%, rgba(201, 166, 255, 0.22), transparent 58%),
    radial-gradient(720px 480px at -12% 18%, rgba(74, 36, 56, 0.72), transparent 62%),
    radial-gradient(640px 420px at 50% 108%, rgba(36, 21, 38, 0.9), transparent 70%),
    linear-gradient(165deg, var(--night) 0%, var(--night-mid) 48%, var(--night-rose) 140%);
}

.sky::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.55;
  background-image:
    radial-gradient(1.2px 1.2px at 12% 18%, rgba(255, 215, 194, 0.7), transparent),
    radial-gradient(1px 1px at 28% 42%, rgba(201, 166, 255, 0.8), transparent),
    radial-gradient(1.4px 1.4px at 72% 14%, rgba(255, 196, 168, 0.65), transparent),
    radial-gradient(1px 1px at 88% 36%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1.2px 1.2px at 64% 68%, rgba(201, 166, 255, 0.5), transparent),
    radial-gradient(1px 1px at 18% 76%, rgba(255, 215, 194, 0.45), transparent),
    radial-gradient(1px 1px at 46% 22%, rgba(255, 255, 255, 0.4), transparent);
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: 80;
  background: linear-gradient(90deg, var(--lilac), var(--peach));
  box-shadow: 0 0 12px rgba(201, 166, 255, 0.55);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  background: rgba(17, 13, 22, 0.72);
  border-bottom: 1px solid var(--line);
}

.site-header__inner,
.shell,
.doc-shell {
  position: relative;
  z-index: 1;
  width: min(100% - 2 * var(--gutter), var(--shell));
  margin: 0 auto;
}

.site-header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--night);
  background: linear-gradient(135deg, var(--moon), var(--lilac) 55%, var(--blush));
  box-shadow: 0 8px 24px rgba(201, 166, 255, 0.28);
}

.brand__name {
  display: block;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.18em;
}

.brand__sub {
  display: block;
  margin-top: 1px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 4px;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
  padding: 8px 12px;
  border-radius: 999px;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--moon);
  background: rgba(201, 166, 255, 0.1);
}

.hero {
  padding: 56px 0 28px;
}

.hero__eyebrow,
.kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--blush);
  text-transform: uppercase;
}

.hero h1,
.page-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.18;
  font-weight: 560;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.hero__lead,
.lede {
  max-width: 720px;
  margin: 0 0 28px;
  font-size: 16.5px;
  color: var(--body);
}

.hero__meta,
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--muted);
  font-size: 13px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(28, 22, 36, 0.7);
  color: var(--moon);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  letter-spacing: 0.08em;
}

.btn-primary {
  color: var(--night);
  background: linear-gradient(135deg, var(--moon), var(--lilac));
}

.btn-primary:hover {
  color: var(--night);
  filter: brightness(1.06);
}

.btn-ghost {
  color: var(--moon);
  border-color: var(--line-strong);
  background: rgba(28, 22, 36, 0.55);
}

.grid-3,
.grid-2,
.grid-4 {
  display: grid;
  gap: 14px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(28, 22, 36, 0.92), rgba(17, 13, 22, 0.72));
  padding: 22px 22px 20px;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(201, 166, 255, 0.45), transparent);
}

.card h2,
.card h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.card h2 {
  font-size: 20px;
}

.card h3 {
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--body);
  font-size: 14.5px;
}

.tag {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--lilac);
  text-transform: uppercase;
}

.doc-card {
  color: inherit;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.doc-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  color: inherit;
}

.scene {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 12px;
  align-items: center;
}

.scene .idx {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.scene .label {
  color: var(--ink);
  font-size: 18px;
  letter-spacing: 0.14em;
}

.scene .pitch {
  color: var(--muted);
  font-size: 13px;
}

.phone {
  width: min(100%, 320px);
  margin: 0 auto;
  padding: 14px;
  border-radius: 36px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #1c1624, #110d16 70%);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.phone__bar {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 18px;
}

.phone__seg {
  flex: 1;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 8px 0;
  border-radius: 999px;
}

.phone__seg.is-on {
  color: var(--moon);
  background: rgba(201, 166, 255, 0.14);
}

.phone__stage {
  height: 220px;
  border-radius: 22px;
  background:
    radial-gradient(180px 120px at 80% 20%, rgba(201, 166, 255, 0.28), transparent),
    linear-gradient(180deg, #241526, #110d16);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.phone__stage strong {
  color: var(--ink);
  font-size: 22px;
  letter-spacing: 0.16em;
  font-weight: 500;
}

.phone__stage span {
  margin-top: 6px;
  color: var(--peach);
  font-size: 13px;
}

.disclaimer {
  margin: 28px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--blush);
  border-radius: 0 16px 16px 0;
  background: rgba(74, 36, 56, 0.35);
  color: var(--moon);
}

.disclaimer strong {
  color: var(--ink);
}

.page-hero {
  padding: 42px 0 8px;
}

.doc-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 22px;
  padding-bottom: 64px;
  align-items: start;
}

.toc-card {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  padding: 18px 16px;
}

.toc-card h2 {
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--muted);
  margin: 0 0 10px;
  font-weight: 600;
}

.toc-card a {
  display: block;
  padding: 7px 8px;
  border-radius: 10px;
  color: var(--body);
  font-size: 13px;
  line-height: 1.45;
}

.toc-card a:hover {
  background: rgba(201, 166, 255, 0.08);
  color: var(--moon);
}

.prose-card {
  padding: 8px 4px 32px;
}

.prose-card section {
  margin: 0 0 28px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(28, 22, 36, 0.62);
}

.prose-card h2 {
  margin: 0 0 14px;
  font-size: 20px;
  color: var(--ink);
  letter-spacing: 0.04em;
}

.prose-card h3 {
  margin: 22px 0 8px;
  font-size: 16px;
  color: var(--moon);
}

.prose-card p,
.prose-card li {
  color: var(--body);
}

.prose-card p {
  margin: 0 0 12px;
}

.prose-card ul,
.prose-card ol {
  margin: 8px 0 14px;
  padding-left: 22px;
}

.prose-card li {
  margin: 6px 0;
}

.prose-card table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 18px;
  font-size: 13.5px;
}

.prose-card th,
.prose-card td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.prose-card th {
  background: rgba(201, 166, 255, 0.08);
  color: var(--moon);
  font-weight: 600;
}

.tip {
  margin: 14px 0;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px dashed var(--line-strong);
  background: rgba(201, 166, 255, 0.06);
  color: var(--moon);
}

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  padding: 28px var(--gutter) 40px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer__inner {
  width: min(100%, var(--shell));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
}

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

.site-footer a:hover {
  color: var(--peach);
}

.section-title {
  margin: 48px 0 16px;
}

.section-title h2 {
  margin: 0;
  color: var(--ink);
  font-size: 24px;
  letter-spacing: 0.12em;
  font-weight: 560;
}

.section-title p {
  margin: 8px 0 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
  padding: 12px 0 40px;
}

@media (max-width: 960px) {
  .grid-3,
  .grid-4,
  .grid-2,
  .split,
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .toc-card {
    position: static;
  }

  .nav a {
    padding: 6px 8px;
    font-size: 12px;
  }
}

@media (max-width: 640px) {
  .brand__sub {
    display: none;
  }

  .hero {
    padding-top: 32px;
  }

  .prose-card section {
    padding: 20px 16px;
  }
}