:root {
  --bg: #0c0c0e;
  --bg-soft: #16161a;
  --bg-card: #1c1c22;
  --line: #2a2a32;
  --text: #f2f2f4;
  --muted: #a8a8b3;
  --accent: #e11d48;
  --accent-soft: #fb7185;
  --gold: #f59e0b;
  --max: 1120px;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --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(ellipse 80% 50% at 10% -10%, rgba(225, 29, 72, 0.18), transparent 50%),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(245, 158, 11, 0.08), transparent 45%),
    var(--bg);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--accent-soft);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #fff;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(12, 12, 14, 0.88);
  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: 0.65rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

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

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

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

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

.menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  padding: 0;
  margin: 0;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
}

.menu-toggle svg {
  width: 20px;
  height: 20px;
  display: block;
  pointer-events: none;
}

.hero {
  padding: 2.5rem 0 1.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.75rem;
  align-items: center;
}

.hero-copy h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.6rem, 3.2vw, 2.35rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.hero-copy .lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #e11d48, #be123c);
  color: #fff;
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent-soft);
  color: #fff;
}

.hero-visual {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--bg-card);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
}

.section {
  padding: 2rem 0;
}

.section-head {
  margin-bottom: 1.25rem;
}

.section-head h2 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
}

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

.cat-grid,
.shot-grid,
.feature-grid {
  display: grid;
  gap: 1rem;
}

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

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

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

.card {
  background: var(--bg-card);
  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(225, 29, 72, 0.45);
}

.card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
  background: var(--bg-soft);
}

.card-body {
  padding: 0.9rem 1rem 1.05rem;
}

.card-body h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.card-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.prose {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.35rem;
}

.prose h2,
.prose h3 {
  margin-top: 1.6rem;
  margin-bottom: 0.65rem;
  scroll-margin-top: 5rem;
}

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

.prose p {
  margin: 0 0 1rem;
  color: #d8d8e0;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: #d8d8e0;
}

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

.toc {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem 1rem;
  margin: 0 0 1.4rem;
  padding: 1rem;
  background: rgba(225, 29, 72, 0.08);
  border: 1px solid rgba(225, 29, 72, 0.2);
  border-radius: 10px;
}

.toc a {
  color: var(--text);
  font-size: 0.92rem;
}

.note {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  background: rgba(225, 29, 72, 0.08);
  border-radius: 0 8px 8px 0;
  margin: 1rem 0;
  color: #e8e8ee;
}

.inline-shots {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin: 1.1rem 0 1.4rem;
}

.inline-shots figure {
  margin: 0;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.inline-shots img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
}

.inline-shots figcaption {
  padding: 0.55rem 0.75rem 0.7rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.page-hero {
  padding: 2rem 0 0.5rem;
}

.page-hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.45rem, 2.8vw, 2rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 52rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

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

.site-footer {
  margin-top: 2.5rem;
  border-top: 1px solid var(--line);
  background: #09090b;
  padding: 2rem 0 1.5rem;
}

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

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

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

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

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

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  color: #777784;
  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(2.5rem, 8vw, 4.5rem);
  margin: 0 0 0.5rem;
  color: var(--accent-soft);
}

.error-page p {
  color: var(--muted);
  margin: 0 0 1.25rem;
}

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

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

  .hero-visual img {
    aspect-ratio: 3 / 3.2;
  }
}

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

  .nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: auto;
    width: min(220px, calc(100vw - 2rem));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem;
    background: rgba(22, 22, 26, 0.98);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow);
    z-index: 120;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.7rem 0.85rem;
    border-radius: 8px;
  }

  .nav a:hover,
  .nav a.active {
    background: rgba(225, 29, 72, 0.12);
  }

  .toc,
  .inline-shots {
    grid-template-columns: 1fr;
  }

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

  .prose {
    padding: 1.1rem 0.95rem;
  }
}

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