:root {
  --bg: #0a0a0c;
  --bg-soft: #121218;
  --bg-card: #1a1a22;
  --text: #f2f2f5;
  --text-muted: #9a9aa8;
  --accent: #e6364f;
  --accent-soft: #ff5a6e;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  --max: 1120px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
}

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

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

a:hover {
  color: #fff;
}

.container {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 10, 12, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  flex-shrink: 0;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.95rem;
  white-space: nowrap;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  background: rgba(230, 54, 79, 0.15);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.25rem;
}

/* Hero */
.hero {
  position: relative;
  padding: 48px 0 36px;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(230, 54, 79, 0.18), transparent 55%),
    linear-gradient(180deg, #12121a 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3.2vw, 2.35rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin: 0 0 22px;
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #c41e3a);
  color: #fff;
}

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

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

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

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.hero-visual {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-card);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 520px;
}

/* Sections */
.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  margin-bottom: 28px;
  max-width: 48em;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  line-height: 1.35;
}

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

.prose h2,
.prose h3 {
  line-height: 1.35;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}

.prose h2 {
  font-size: 1.45rem;
}

.prose h3 {
  font-size: 1.15rem;
  color: #fff;
}

.prose p {
  margin: 0 0 1em;
  color: #d7d7e0;
}

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.25em;
  color: #d7d7e0;
}

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

.prose strong {
  color: #fff;
  font-weight: 600;
}

/* Cards / grids */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

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

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

.shot-item figcaption {
  padding: 10px 12px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.shot-grid.wide .shot-item img,
.cat-grid .shot-item img {
  aspect-ratio: 3 / 4;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.panel {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.panel img {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(230, 54, 79, 0.12);
  color: #ffb3be;
  font-size: 0.85rem;
  border: 1px solid rgba(230, 54, 79, 0.25);
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 28px 0;
}

.toc h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

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

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

.toc a:hover {
  color: var(--accent-soft);
}

.faq details {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

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

.faq details p {
  margin: 10px 0 0;
  color: var(--text-muted);
}

.cta-band {
  margin: 40px 0 0;
  padding: 28px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(230, 54, 79, 0.22), rgba(20, 20, 28, 0.9)),
    var(--bg-card);
  border: 1px solid rgba(230, 54, 79, 0.35);
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 10px;
}

.cta-band p {
  margin: 0 0 18px;
  color: var(--text-muted);
}

/* Page hero compact */
.page-hero {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #14141c, var(--bg));
}

.page-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.page-hero p {
  margin: 0;
  color: var(--text-muted);
  max-width: 40em;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.content-wrap {
  padding: 40px 0 56px;
}

/* Error pages */
.error-page {
  min-height: calc(100vh - var(--header-h) - 180px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 16px;
}

.error-page .code {
  font-size: clamp(3.5rem, 10vw, 6rem);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin: 0 0 12px;
}

.error-page h1 {
  margin: 0 0 12px;
  font-size: 1.5rem;
}

.error-page p {
  color: var(--text-muted);
  margin: 0 0 22px;
}

/* Footer */
.site-footer {
  background: #07070a;
  border-top: 1px solid var(--line);
  padding: 40px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.footer-brand h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.footer-brand p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 0.95rem;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-size: 0.92rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

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

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

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

  .hero-visual img {
    max-height: 420px;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(12, 12, 16, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 10px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 12px 14px;
  }

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

  .section {
    padding: 40px 0;
  }

  .hero {
    padding: 28px 0 24px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-grid {
    gap: 20px;
  }
}

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