:root {
  --bg: #0a0a0c;
  --bg-soft: #141418;
  --bg-card: #1a1a20;
  --text: #f2f2f5;
  --text-muted: #9a9aa8;
  --accent: #e63946;
  --accent-soft: #ff6b6b;
  --line: #2a2a32;
  --radius: 12px;
  --max: 1180px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(230, 57, 70, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(255, 107, 107, 0.08), transparent);
}

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

a:hover {
  color: #fff;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

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

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

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

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

.nav-desktop {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
}

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

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

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 110;
  width: 100% !important;
  max-width: none !important;
  margin: 0 !important;
  flex-direction: column;
  gap: 0;
  padding: 8px 16px 12px;
  background: rgba(14, 14, 18, 0.98);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  box-sizing: border-box;
}

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

.nav-mobile a {
  color: var(--text-muted);
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
}

.nav-mobile a:last-child {
  border-bottom: none;
}

.nav-mobile a:hover {
  color: #fff;
}

/* Hero */
.hero {
  padding: 48px 0 36px;
}

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

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent-soft);
  border: 1px solid rgba(230, 57, 70, 0.4);
  background: rgba(230, 57, 70, 0.12);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.35;
  margin-bottom: 14px;
  font-weight: 800;
}

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

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff7a45);
  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);
  color: #fff;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

/* Sections */
.section {
  padding: 42px 0;
}

.section-head {
  margin-bottom: 24px;
}

.section-head h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  margin-bottom: 8px;
}

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

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(20, 20, 24, 0.85), transparent);
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

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

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

.shot-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, border-color 0.2s;
}

.shot-card:hover {
  transform: translateY(-3px);
  border-color: rgba(230, 57, 70, 0.5);
}

.shot-card img {
  width: 100%;
  aspect-ratio: 9 / 14;
  object-fit: cover;
  border-radius: 0;
}

.shot-card .cap {
  padding: 12px 12px 14px;
}

.shot-card .cap h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.shot-card .cap p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

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

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

.cat-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 0;
  opacity: 0.88;
}

.cat-item span {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 12px 12px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
  font-weight: 600;
  font-size: 0.95rem;
}

.prose {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.prose p {
  margin-bottom: 1.05em;
}

.prose h2 {
  color: var(--text);
  font-size: 1.45rem;
  margin: 1.6em 0 0.7em;
}

.prose h3 {
  color: var(--text);
  font-size: 1.15rem;
  margin: 1.35em 0 0.55em;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1em 1.25em;
}

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

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

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}

.two-col img {
  border: 1px solid var(--line);
  border-radius: 12px;
}

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

.step {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  color: var(--accent);
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.step h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.step p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.faq details {
  background: var(--bg-card);
  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-top: 10px;
  color: var(--text-muted);
}

.internal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.internal-links a {
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.88rem;
}

.internal-links a:hover {
  border-color: var(--accent);
  color: #fff;
}

/* Page header for subpages */
.page-hero {
  padding: 36px 0 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.page-hero h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 8px;
}

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

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

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

.content-wrap {
  padding-bottom: 48px;
}

/* Error pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 16px;
}

.error-page h1 {
  font-size: 4rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
}

.error-page h2 {
  margin-bottom: 10px;
}

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

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #070709;
  padding: 36px 0 24px;
  margin-top: 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-grid h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.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: 8px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

/* Responsive */
@media (max-width: 980px) {
  .hero-grid,
  .two-col,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 720px) {
  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-header .container.header-inner {
    position: relative;
  }

  .hero {
    padding: 28px 0 20px;
  }

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

  .section {
    padding: 28px 0;
  }

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

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