:root {
  --bg: #fff8f2;
  --ink: #3a3551;
  --soft-ink: #60597a;
  --card: rgba(255, 255, 255, 0.92);
  --line: rgba(113, 93, 180, 0.14);
  --primary: #f5576c;
  --secondary: #667eea;
  --mint: #7bdff2;
  --gold: #ffd166;
  --shadow: 0 22px 60px rgba(69, 48, 117, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(123, 223, 242, 0.28), transparent 28%),
    radial-gradient(circle at top right, rgba(245, 87, 108, 0.22), transparent 30%),
    linear-gradient(135deg, #fff7f0 0%, #f8fbff 46%, #fff7fb 100%);
  min-height: 100vh;
}

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

code, pre {
  font-family: "SFMono-Regular", "Consolas", monospace;
}

.page-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
  min-width: 0;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: 26px 20px 32px;
  background: rgba(255, 255, 255, 0.72);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(245, 87, 108, 0.14), rgba(102, 126, 234, 0.16));
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}

.brand-mark {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 28px;
  background: linear-gradient(135deg, #ff9a9e, #fad0c4 45%, #fbc2eb);
}

.brand-mark img {
  width: 40px;
  height: 40px;
}

.brand strong {
  display: block;
  font-size: 1rem;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: var(--soft-ink);
}

.sidebar-nav {
  display: grid;
  gap: 18px;
}

.sidebar-group {
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.48);
  border: 1px solid rgba(176, 75, 143, 0.08);
  overflow: hidden;
}

.sidebar-group summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px;
  margin: 0;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #b04b8f;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-group summary::-webkit-details-marker {
  display: none;
}

.sidebar-group summary::after {
  content: "展开";
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--soft-ink);
}

.sidebar-group[open] summary::after {
  content: "收起";
}

.sidebar-links {
  display: grid;
  gap: 8px;
  padding: 0 12px 12px;
}

.sidebar-link {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 16px;
  transition: transform 180ms ease, background 180ms ease;
}

.sidebar-link:hover,
.sidebar-link.is-active {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 10px 24px rgba(69, 48, 117, 0.08);
}

.sidebar-link small {
  color: var(--soft-ink);
}

.main {
  padding: 28px 28px 56px;
  min-width: 0;
}

.hero {
  padding: 30px;
  border-radius: 34px;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.48), transparent 30%),
    linear-gradient(135deg, #f8a7ff 0%, #f5576c 36%, #ffd166 100%);
  color: white;
  box-shadow: var(--shadow);
}

.hero-topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-toggle,
.source-link {
  border: 0;
  background: rgba(255, 255, 255, 0.18);
  color: white;
  border-radius: 999px;
  padding: 10px 16px;
  font: inherit;
}

.nav-toggle {
  width: 48px;
  height: 48px;
  padding: 0;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero-eyebrow,
.section-kicker {
  margin: 0 0 12px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.92;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 3.5rem);
  line-height: 1.05;
}

.hero-copy {
  max-width: 760px;
  margin: 18px 0 0;
  font-size: 1.08rem;
  line-height: 1.8;
}

.overview-meta span,
.overview-meta a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.mobile-nav-shell {
  display: none;
}

.mobile-nav-backdrop {
  display: none;
}

.mobile-nav {
  display: none;
}

.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 18px 14px;
  margin-bottom: 6px;
  border-bottom: 1px solid rgba(113, 93, 180, 0.14);
}

.mobile-nav-head strong {
  font-size: 1rem;
  color: #3a3551;
}

.mobile-nav-close {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(102, 126, 234, 0.12);
  color: #514a72;
  font: inherit;
}

.mobile-nav .sidebar-nav {
  padding: 14px;
}

.mobile-nav .sidebar-group {
  background: rgba(255, 255, 255, 0.72);
}

.section-shell {
  margin-top: 24px;
  min-width: 0;
}

.spotlight-card,
.overview-card,
.ad-placeholder {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: 26px;
  box-shadow: var(--shadow);
  min-width: 0;
}

.brand-overview {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.brand-overview-art {
  display: grid;
  place-items: center;
  min-height: 180px;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(255, 233, 188, 0.72), rgba(248, 238, 255, 0.86));
}

.brand-overview-art img {
  width: 140px;
  height: auto;
}

.spotlight-card {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 18px;
}

.section-heading h2,
.spotlight-card h2,
.overview-card h2 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
}

.section-heading p,
.spotlight-card p,
.overview-card p,
.story-card p,
.source-card p,
.ad-placeholder p {
  margin: 0;
  color: var(--soft-ink);
  line-height: 1.8;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.stat-card,
.home-card {
  border-radius: 22px;
  padding: 18px;
  background: linear-gradient(135deg, rgba(255, 240, 245, 0.95), rgba(243, 248, 255, 0.95));
  border: 1px solid rgba(113, 93, 180, 0.12);
}

.icon-grid {
  display: grid;
  gap: 18px;
}

.icon-card {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.icon-preview {
  display: grid;
  place-items: center;
  min-height: 260px;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(255, 245, 214, 0.92), rgba(245, 239, 255, 0.92));
}

.icon-preview img {
  width: min(220px, 100%);
  height: auto;
}

.icon-copy h2 {
  margin: 0 0 10px;
  font-size: 1.9rem;
}

.icon-copy code {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(102, 126, 234, 0.12);
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  margin-bottom: 6px;
}

.home-grid,
.story-grid {
  display: grid;
  gap: 18px;
}

.home-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.home-card {
  box-shadow: var(--shadow);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.home-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 66px rgba(69, 48, 117, 0.16);
}

.home-card-index {
  display: inline-flex;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #7bdff2, #b2f7ef);
  color: #2d3265;
  font-weight: 700;
}

.home-card h2 {
  margin: 16px 0 8px;
}

.story-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.story-card,
.source-card {
  padding: 22px;
  border-radius: 26px;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  min-width: 0;
}

.story-card-label {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(245, 87, 108, 0.12), rgba(102, 126, 234, 0.12));
  color: #9b3d88;
  font-size: 0.85rem;
}

.source-card ul,
.code-steps {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--soft-ink);
  line-height: 1.8;
}

.source-card pre {
  margin: 14px 0 0;
  padding: 18px;
  overflow: auto;
  max-width: 100%;
  border-radius: 22px;
  background: #2d2b45;
  color: #f7f5ff;
}

.section-heading p,
.spotlight-card p,
.overview-card p,
.story-card p,
.source-card p,
.ad-placeholder p,
.source-card li,
.source-card a,
.source-card code,
.overview-meta span,
.overview-meta a {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.source-card code {
  background: rgba(102, 126, 234, 0.12);
  border-radius: 8px;
  padding: 2px 6px;
}

.source-card pre code {
  padding: 0;
  background: transparent;
  overflow-wrap: normal;
  word-break: normal;
}

.source-table-scroll {
  margin: 14px 0 0;
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
}

.source-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  color: var(--soft-ink);
  line-height: 1.6;
}

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

.source-table th {
  color: var(--ink);
  background: rgba(102, 126, 234, 0.1);
}

.source-table-fallback {
  overflow-wrap: anywhere;
}

.overview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  color: var(--soft-ink);
}

.ad-placeholder {
  text-align: center;
  background: linear-gradient(135deg, rgba(255, 233, 188, 0.65), rgba(255, 255, 255, 0.9));
}

.page-footer {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 24px 12px 0;
  color: var(--soft-ink);
}

@media (max-width: 1080px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .mobile-nav-shell {
    position: fixed;
    inset: 0;
    z-index: 40;
    pointer-events: none;
  }

  .mobile-nav-shell.is-open {
    display: block;
    pointer-events: auto;
  }

  .mobile-nav-shell.is-open .mobile-nav-backdrop {
    display: block;
    position: absolute;
    inset: 0;
    border: 0;
    background: rgba(32, 19, 50, 0.46);
  }

  .mobile-nav {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    display: block;
    width: min(86vw, 360px);
    margin: 0;
    padding: 14px 0 18px;
    border-radius: 0 28px 28px 0;
    border-right: 1px solid rgba(255, 255, 255, 0.22);
    background: rgba(250, 246, 255, 0.96);
    backdrop-filter: blur(18px);
    box-shadow: 0 24px 60px rgba(30, 20, 53, 0.22);
    transform: translateX(-100%);
    transition: transform 220ms ease;
    overflow: auto;
  }

  .mobile-nav-shell.is-open .mobile-nav {
    transform: translateX(0);
  }

  .hero-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-actions {
    width: 100%;
  }

  .nav-toggle,
  .hero-actions .source-link {
    min-height: 44px;
  }

  .spotlight-card,
  .story-grid,
  .icon-card,
  .brand-overview {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .main {
    padding: 18px 14px 38px;
  }

  .brand {
    align-items: flex-start;
    padding: 16px;
  }

  .brand-mark {
    width: 48px;
    height: 48px;
  }

  .brand-mark img {
    width: 34px;
    height: 34px;
  }

  .hero,
  .spotlight-card,
  .overview-card,
  .story-card,
  .source-card,
  .ad-placeholder {
    border-radius: 24px;
    padding: 20px;
  }

  .hero-copy {
    font-size: 1rem;
  }

  .hero-actions,
  .overview-meta {
    gap: 8px;
  }

  .hero-actions .source-link,
  .nav-toggle {
    min-height: 44px;
  }

  .mobile-nav-head {
    padding-left: 16px;
    padding-right: 16px;
  }

  .overview-meta span,
  .overview-meta a {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .stat-grid,
  .home-grid,
  .story-grid {
    grid-template-columns: 1fr;
  }

  .source-card pre {
    font-size: 0.92rem;
    padding: 16px;
  }

  .page-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 540px) {
  .hero-topbar {
    gap: 12px;
    margin-bottom: 18px;
  }

  .hero h1 {
    font-size: clamp(1.8rem, 9vw, 2.35rem);
  }

  .hero-copy,
  .section-heading p,
  .spotlight-card p,
  .overview-card p,
  .story-card p,
  .source-card p,
  .ad-placeholder p {
    line-height: 1.65;
  }

  .sidebar-group summary,
  .sidebar-link {
    padding-left: 12px;
    padding-right: 12px;
  }

  .mobile-nav {
    width: min(90vw, 340px);
    border-radius: 0 24px 24px 0;
  }

  .mobile-nav-head {
    padding-left: 14px;
    padding-right: 14px;
  }

  .mobile-nav-close {
    padding: 9px 12px;
  }
}