:root {
  --bg: #0f0c14;
  --bg-soft: #1a1524;
  --bg-card: #221c30;
  --text: #f3eef8;
  --text-muted: #b8aec8;
  --accent: #ff6a3d;
  --accent-2: #c44dff;
  --line: rgba(255, 255, 255, 0.08);
  --max: 1120px;
  --radius: 14px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(196, 77, 255, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 106, 61, 0.16), transparent 50%),
    linear-gradient(180deg, #140f1c 0%, var(--bg) 40%, #120e18 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

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

a:hover {
  text-decoration: underline;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(15, 12, 20, 0.86);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

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

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

.hero-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.hero-copy .lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin: 0 0 1.4rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff8f5a);
  color: #1a0f0a;
}

.btn-secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.section {
  padding: 2.6rem 0;
}

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

.section-head h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  max-width: 62ch;
}

.feature-grid,
.shot-grid,
.guide-grid {
  display: grid;
  gap: 1.1rem;
}

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

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

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

.feature-item,
.guide-item,
.content-block,
.legal-box {
  background: linear-gradient(180deg, rgba(34, 28, 48, 0.95), rgba(26, 21, 36, 0.92));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.25rem;
}

.feature-item h3,
.guide-item h3 {
  margin: 0 0 0.55rem;
  font-size: 1.08rem;
}

.feature-item p,
.guide-item p,
.content-block p,
.legal-box p {
  margin: 0 0 0.85rem;
  color: var(--text-muted);
}

.feature-item p:last-child,
.guide-item p:last-child,
.content-block p:last-child,
.legal-box p:last-child {
  margin-bottom: 0;
}

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

.shot-item img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
}

.shot-item figcaption {
  padding: 0.7rem 0.8rem 0.9rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: center;
}

.split img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.prose h2,
.prose h3 {
  margin-top: 1.8rem;
}

.prose p {
  color: var(--text-muted);
}

.prose ul {
  color: var(--text-muted);
  padding-left: 1.2rem;
}

.prose li {
  margin-bottom: 0.45rem;
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 1.2rem 0 1.6rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.5rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

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

.page-hero {
  padding: 2.2rem 0 0.5rem;
}

.page-hero h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

.page-hero p {
  margin: 0;
  color: var(--text-muted);
  max-width: 70ch;
}

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  background: rgba(10, 8, 14, 0.9);
  padding: 2.2rem 0 1.6rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
}

.site-footer h3 {
  margin: 0 0 0.7rem;
  font-size: 1rem;
}

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

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.copyright {
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.error-page h1 {
  font-size: clamp(2.4rem, 8vw, 4rem);
  margin: 0 0 0.6rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.error-page p {
  color: var(--text-muted);
  margin: 0 0 1.2rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.tag-list span {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  font-size: 0.85rem;
}

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

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

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

  .nav-links {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 64px;
    flex-direction: column;
    gap: 0;
    background: #1b1526;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li a {
    display: block;
    padding: 0.75rem 0.85rem;
    border-radius: 8px;
  }

  .nav-links li a:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .hero {
    padding-top: 1.8rem;
  }

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

@media (max-width: 420px) {
  .shot-grid {
    grid-template-columns: 1fr;
  }
}