:root {
  --bg: #0f1432;
  --bg-soft: #171c44;
  --panel: rgba(14, 19, 44, 0.84);
  --panel-strong: rgba(19, 26, 60, 0.96);
  --text: #f6f3ff;
  --muted: rgba(246, 243, 255, 0.72);
  --line: rgba(255, 255, 255, 0.12);
  --pink: #ff7ea9;
  --purple: #8a63ff;
  --blue: #55c7ff;
  --orange: #ffb14d;
  --mint: #4fe1c4;
  --cream: #fff6e1;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.24);
  --radius: 28px;
  --radius-sm: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 126, 169, 0.24), transparent 32%),
    radial-gradient(circle at top right, rgba(138, 99, 255, 0.22), transparent 28%),
    radial-gradient(circle at 70% 90%, rgba(85, 199, 255, 0.16), transparent 34%),
    linear-gradient(180deg, #090d22 0%, #111836 52%, #101530 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 100%);
  pointer-events: none;
  opacity: .35;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(22px);
  background: rgba(10, 14, 35, 0.64);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand img {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  flex: none;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.28);
}

.brand strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.15;
}

.brand small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar { display: none; }

.nav-link {
  padding: 10px 14px;
  border-radius: 999px;
  color: rgba(246, 243, 255, 0.84);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: .2s ease;
}

.nav-link:hover, .nav-link.is-active {
  background: linear-gradient(135deg, rgba(255, 126, 169, 0.24), rgba(138, 99, 255, 0.22));
  border-color: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 14px;
}

.header-cta {
  flex: none;
}

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

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  color: rgba(246,243,255,.7);
  margin: 10px 0 20px;
}

.breadcrumbs a {
  color: rgba(255,255,255,.9);
}

.sep { opacity: .45; }

.hero {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 28px;
  align-items: center;
  background: linear-gradient(135deg, rgba(25, 31, 80, .9), rgba(16, 20, 50, .72));
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 36px;
  padding: 38px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -60px -120px auto;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,126,169,.22), transparent 70%);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: .18em;
  color: var(--orange);
  font-size: .78rem;
  margin: 0 0 14px;
}

.hero h1, .section-head h2 {
  margin: 0;
  line-height: 1.08;
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 4.4rem);
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.9;
  margin: 18px 0 0;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 999px;
  padding: 14px 20px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--purple));
  color: #fff;
  box-shadow: 0 16px 28px rgba(138, 99, 255, 0.28);
}

.btn-secondary {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.14);
  color: #fff;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.stat {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
}

.stat strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.stat span {
  color: var(--muted);
  font-size: .92rem;
}

.hero-aside {
  display: grid;
  gap: 14px;
}

.hero-panel {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 28px;
  padding: 20px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}

.hero-panel h3 {
  margin: 0 0 10px;
}

.hero-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.hero-list li {
  display: flex;
  gap: 10px;
  color: var(--muted);
  line-height: 1.7;
}

.hero-list span {
  color: var(--orange);
  font-weight: 700;
  flex: none;
}

.section {
  margin-top: 28px;
}

.section-head {
  max-width: 760px;
  margin-bottom: 18px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.7rem);
  margin-bottom: 10px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

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

.feature-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card, .quote-card, .link-card, .preview-card, .content-card, .faq-item, .timeline-card, .stat-card {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-card, .quote-card, .preview-card, .content-card, .stat-card {
  padding: 22px;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255,126,169,.2), rgba(138,99,255,.18));
  color: var(--cream);
  font-size: .82rem;
  margin-bottom: 16px;
}

.info-card h3, .quote-card h3, .timeline-card h3, .content-card h3 {
  margin: 0 0 10px;
}

.info-card p, .quote-card p, .timeline-card p, .content-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.preview-strip {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
}

.preview-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.shot {
  padding: 14px;
  border-radius: 24px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
}

.shot img {
  border-radius: 20px;
  width: 100%;
  height: auto;
}

.shot figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: .94rem;
}

.link-card {
  display: grid;
  gap: 8px;
  padding: 20px;
  transition: .2s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
}

.link-card strong {
  font-size: 1.02rem;
}

.link-card span {
  color: var(--muted);
  line-height: 1.7;
}

.quote-card {
  position: relative;
}

.quote-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--pink), var(--orange));
  color: #fff;
  font-weight: 800;
}

.quote-top h3 {
  margin: 0;
}

.quote-top p, .footer-copy {
  margin: 0;
  color: var(--muted);
}

.quote-text {
  font-size: 1rem;
  line-height: 1.85;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  overflow: hidden;
  padding: 0;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-weight: 700;
  border-bottom: 1px solid transparent;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item[open] summary {
  border-bottom-color: rgba(255,255,255,.1);
}

.faq-body {
  padding: 0 22px 18px;
  color: var(--muted);
  line-height: 1.85;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 14px;
  align-items: start;
}

.timeline-date {
  padding-top: 10px;
  color: var(--orange);
  font-weight: 800;
}

.timeline-card {
  padding: 20px;
}

.meta-box {
  display: grid;
  gap: 16px;
}

.meta-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.callout {
  background: linear-gradient(135deg, rgba(255,126,169,.16), rgba(138,99,255,.14));
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 28px;
  padding: 24px;
}

.callout p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.callout .btn { margin-top: 14px; }

.detail-columns {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 18px;
  align-items: start;
}

.detail-panel {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.article {
  background: var(--panel-strong);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 32px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.article p, .article li {
  color: var(--muted);
  line-height: 1.9;
}

.article h2 {
  margin-top: 28px;
  margin-bottom: 12px;
}

.article h3 {
  margin-top: 18px;
  margin-bottom: 10px;
}

.step-list {
  display: grid;
  gap: 14px;
  counter-reset: step;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.step-list li {
  position: relative;
  padding: 18px 18px 18px 70px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 22px;
  line-height: 1.8;
}

.step-list li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 18px;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--pink), var(--purple));
  font-weight: 800;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.09);
  color: var(--muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr .8fr .9fr;
  gap: 20px;
  padding: 36px 0 20px;
}

.site-footer {
  background: rgba(8, 11, 28, 0.88);
  border-top: 1px solid rgba(255,255,255,.08);
}

.footer-brand {
  margin-bottom: 14px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

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

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 26px;
  color: rgba(246,243,255,.64);
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: .94rem;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.subhero {
  margin-bottom: 22px;
}

.subhero .hero {
  grid-template-columns: 1fr;
  padding: 28px;
}

.subhero .hero-aside {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.subhero .hero-panel {
  min-height: 100%;
}

@media (max-width: 1100px) {
  .hero, .preview-strip, .detail-columns, .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid.four, .feature-grid, .link-grid, .review-grid, .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-gallery, .hero-stats, .subhero .hero-aside {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 18px, 1180px);
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 0;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    order: 4;
    margin-left: 0;
    padding-top: 8px;
    overflow: visible;
    flex-wrap: wrap;
  }

  .site-nav.is-open {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding: 22px;
  }

  .hero h1 {
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .hero-stats, .feature-grid, .link-grid, .review-grid, .category-grid, .preview-gallery, .subhero .hero-aside {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }
}