:root {
  --bg: #0a0a0c;
  --bg-soft: #121218;
  --bg-card: #18181f;
  --line: #2a2a35;
  --text: #f2f2f5;
  --muted: #a0a0b0;
  --pink: #ff2d6a;
  --pink-deep: #d4184f;
  --pink-soft: #ff6b95;
  --gold: #e8b84a;
  --max: 1120px;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font-display: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "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-body);
  color: var(--text);
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(255, 45, 106, 0.18), transparent 60%),
    radial-gradient(900px 400px at 10% 0%, rgba(232, 184, 74, 0.08), transparent 55%),
    linear-gradient(180deg, #0d0d12 0%, var(--bg) 40%, #08080b 100%);
  background-attachment: fixed;
  line-height: 1.75;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--pink);
}

.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(10, 10, 12, 0.82);
  border-bottom: 1px solid rgba(255, 45, 106, 0.2);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

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

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

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

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

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(255, 45, 106, 0.35);
}

.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 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.hero-copy h1 span {
  color: var(--pink);
}

.hero-lead {
  margin: 0 0 1.4rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  color: #fff;
  box-shadow: 0 10px 28px rgba(255, 45, 106, 0.32);
}

.btn-primary:hover {
  color: #fff;
  opacity: 0.92;
}

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

.btn-ghost:hover {
  border-color: var(--pink);
  color: var(--pink-soft);
}

.trust-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 45, 106, 0.25);
  box-shadow: var(--shadow);
}

.section {
  padding: 2.6rem 0;
}

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

.section-head h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 46rem;
}

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

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

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

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

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

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

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

.shot-card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  background: #111;
}

.shot-card .cap {
  padding: 0.85rem 1rem 1.05rem;
}

.shot-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.shot-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

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

.cat-item {
  display: block;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.95rem 1rem;
  color: var(--text);
}

.cat-item:hover {
  border-color: var(--pink);
  color: var(--pink-soft);
}

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

.step {
  background: linear-gradient(180deg, rgba(255, 45, 106, 0.08), transparent 70%), var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem;
}

.step .num {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--pink);
  color: #fff;
  font-weight: 700;
  margin-bottom: 0.7rem;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.seo-article {
  background: rgba(18, 18, 24, 0.85);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.6rem 1.4rem;
}

.seo-article h2,
.seo-article h3 {
  scroll-margin-top: 5rem;
}

.seo-article h2 {
  margin: 1.6rem 0 0.75rem;
  font-size: 1.45rem;
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  margin: 1.25rem 0 0.55rem;
  font-size: 1.15rem;
  color: #ffe3ec;
}

.seo-article p {
  margin: 0 0 1rem;
  color: #d4d4de;
}

.seo-article ul,
.seo-article ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: #d4d4de;
}

.seo-article li {
  margin-bottom: 0.4rem;
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin-bottom: 1.4rem;
}

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

.toc a {
  display: inline-block;
  margin: 0.2rem 0.7rem 0.2rem 0;
  color: var(--muted);
}

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

.page-hero {
  padding: 2.4rem 0 1rem;
}

.page-hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 42rem;
}

.prose {
  background: rgba(18, 18, 24, 0.9);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.35rem 1.8rem;
  margin-bottom: 2.5rem;
}

.prose h2 {
  margin: 1.5rem 0 0.65rem;
  font-size: 1.25rem;
}

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

.prose p,
.prose li {
  color: #d4d4de;
}

.prose ul {
  padding-left: 1.2rem;
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: #08080b;
  padding: 2rem 0 2.4rem;
}

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

.footer-brand {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
}

.footer-brand img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
}

.footer-brand p,
.site-footer p {
  color: var(--muted);
  margin: 0.35rem 0 0;
  font-size: 0.92rem;
}

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

.footer-col a {
  display: block;
  color: var(--muted);
  margin-bottom: 0.4rem;
  font-size: 0.92rem;
}

.footer-col a:hover {
  color: var(--pink-soft);
}

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

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

.error-wrap h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(2rem, 6vw, 3.2rem);
  color: var(--pink);
}

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

.age-tip {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
  background: rgba(232, 184, 74, 0.12);
  color: var(--gold);
  font-size: 0.85rem;
  border: 1px solid rgba(232, 184, 74, 0.35);
}

.download-panel {
  margin: 1.5rem 0;
  padding: 1.2rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 45, 106, 0.35);
  background: linear-gradient(135deg, rgba(255, 45, 106, 0.12), rgba(18, 18, 24, 0.9));
}

.download-panel h2 {
  margin: 0 0 0.5rem;
}

.download-panel p {
  margin: 0 0 1rem;
  color: var(--muted);
}

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

  .cat-grid {
    grid-template-columns: 1fr 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;
    align-items: stretch;
    gap: 0;
    background: #121218;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.5rem;
    box-shadow: var(--shadow);
  }

  .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, 45, 106, 0.1);
  }

  .hero {
    padding-top: 1.6rem;
  }

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

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

  .seo-article,
  .prose {
    padding: 1.15rem 1rem 1.4rem;
  }
}