:root {
  --bg: #0b0b0f;
  --bg-soft: #14141c;
  --bg-card: #1a1a24;
  --text: #f2f2f5;
  --text-muted: #a8a8b8;
  --brand: #ff4d8d;
  --brand-2: #ff8a3d;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --max: 1120px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(255, 77, 141, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(255, 138, 61, 0.14), transparent 50%),
    linear-gradient(180deg, #101018 0%, var(--bg) 40%, #09090d 100%);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: #ff9fc0;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #fff;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(10, 10, 14, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.nav a:hover,
.nav a.active {
  color: #fff;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: #fff;
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
  display: block;
  pointer-events: none;
}

.hero {
  padding: 3.2rem 0 2.2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--brand);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.25;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, #fff 0%, #ffd0e2 55%, #ffc29a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.4rem;
  max-width: 36em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 77, 141, 0.28);
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.05);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
  color: #fff;
}

.hero-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 560px;
}

.section {
  padding: 2.6rem 0;
}

.section-head {
  margin-bottom: 1.4rem;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 0.55rem;
}

.section-head p {
  color: var(--text-muted);
  max-width: 48em;
}

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

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 77, 141, 0.35);
}

.card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 420px;
}

.card-body {
  padding: 1rem 1.05rem 1.15rem;
}

.card-body h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.card-body p {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem;
}

.feature {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1rem;
  align-items: start;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

.feature img {
  width: 100%;
  border-radius: 10px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 220px;
}

.feature h3 {
  margin-bottom: 0.4rem;
  font-size: 1.08rem;
}

.feature p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.prose {
  background: rgba(20, 20, 28, 0.72);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.4rem 1.5rem;
}

.prose h2,
.prose h3 {
  margin: 1.4rem 0 0.7rem;
}

.prose h2:first-child,
.prose h3:first-child {
  margin-top: 0;
}

.prose p {
  color: #d7d7e2;
  margin-bottom: 0.95rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem 1.2rem;
  color: #d7d7e2;
}

.prose li {
  margin-bottom: 0.4rem;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
}

.shot {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.shot img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 320px;
}

.shot figcaption {
  padding: 0.65rem 0.75rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  align-items: stretch;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}

.panel h3 {
  margin-bottom: 0.6rem;
}

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

.panel ul {
  margin-left: 1.1rem;
}

.panel img {
  margin-top: 0.9rem;
  border-radius: 12px;
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}

.faq details {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.7rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  color: var(--text-muted);
  margin-top: 0.55rem;
}

.breadcrumb {
  padding: 1.1rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.breadcrumb a {
  color: var(--text-muted);
}

.page-hero {
  padding: 1.6rem 0 0.4rem;
}

.page-hero h1 {
  font-size: clamp(1.55rem, 2.8vw, 2.2rem);
  margin-bottom: 0.6rem;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 46em;
}

.site-footer {
  margin-top: 2.5rem;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.35);
  padding: 2rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.4rem;
}

.footer-grid h3 {
  font-size: 1rem;
  margin-bottom: 0.7rem;
}

.footer-grid p,
.footer-grid a {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.footer-grid ul {
  list-style: none;
}

.footer-grid li {
  margin-bottom: 0.4rem;
}

.copyright {
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: #7f7f90;
  font-size: 0.85rem;
  text-align: center;
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: 0.6rem;
}

.error-page p {
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0 0.2rem;
}

.toc a {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

@media (max-width: 960px) {
  .hero-grid,
  .feature-grid,
  .two-col,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

  .feature {
    grid-template-columns: 110px 1fr;
  }

  .hero-visual img {
    max-height: 480px;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
  }

  .nav.open {
    display: flex;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    left: auto;
    width: min(240px, calc(100vw - 2rem));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.55rem;
    background: rgba(16, 16, 24, 0.96);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
    z-index: 120;
  }

  .nav.open a {
    padding: 0.7rem 0.85rem;
    border-radius: 10px;
  }

  .nav.open a:hover,
  .nav.open a.active {
    background: rgba(255, 255, 255, 0.06);
  }

  .header-inner {
    flex-wrap: nowrap;
  }

  .card-grid,
  .shot-grid {
    grid-template-columns: 1fr;
  }

  .feature {
    grid-template-columns: 1fr;
  }

  .prose {
    padding: 1.1rem;
  }

  .hero {
    padding-top: 2rem;
  }
}