:root {
  --bg: #0e0c0d;
  --bg-soft: #161214;
  --bg-card: #1c1719;
  --line: #2e2428;
  --text: #f3ebe8;
  --muted: #b9a8ad;
  --accent: #c43b4e;
  --accent-2: #e85a6b;
  --accent-soft: rgba(196, 59, 78, 0.16);
  --ok: #3dbf8a;
  --radius: 14px;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
  --max: 1120px;
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(196, 59, 78, 0.18), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(120, 40, 60, 0.2), transparent 55%),
    linear-gradient(180deg, #120f11 0%, var(--bg) 40%, #0a090a 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--accent-2);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #ff7b8a;
}

ul {
  list-style: none;
}

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(14, 12, 13, 0.86);
  border-bottom: 1px solid rgba(46, 36, 40, 0.9);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}

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

.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: 10px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #9b2034);
  color: #fff !important;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(196, 59, 78, 0.35);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--text);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  padding: 64px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
}

.hero-copy .eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--accent-2);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.25;
  margin-bottom: 16px;
  font-weight: 400;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 24px;
  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;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 10px 28px rgba(196, 59, 78, 0.32);
}

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

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-2);
}

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

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 22px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  aspect-ratio: 9 / 16;
  max-height: 620px;
  object-fit: cover;
  object-position: top;
  margin: 0 auto;
}

.trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 36px;
}

.trust-item {
  background: rgba(28, 23, 25, 0.85);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.trust-item strong {
  display: block;
  font-size: 1.2rem;
  color: var(--accent-2);
  margin-bottom: 4px;
}

.trust-item span {
  color: var(--muted);
  font-size: 0.88rem;
}

.section {
  padding: 56px 0;
}

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

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 10px;
  font-weight: 400;
}

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

.feature-grid,
.shot-grid,
.step-grid,
.card-grid {
  display: grid;
  gap: 18px;
}

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

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

.feature-card h3,
.content-card h3,
.step-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p,
.content-card p,
.step-card p {
  color: var(--muted);
  font-size: 0.98rem;
}

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

.shot-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

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

.shot-item figcaption {
  padding: 12px 14px 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.step-card .num {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-2);
  margin-bottom: 12px;
  font-weight: 700;
}

.prose {
  background: rgba(22, 18, 20, 0.9);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(22px, 4vw, 40px);
}

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 400;
  margin: 1.4em 0 0.6em;
}

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

.prose p {
  margin-bottom: 1em;
  color: #d8cdcfd9;
}

.prose ul,
.prose ol {
  margin: 0 0 1em 1.2em;
  color: #d8cdcfd9;
}

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

.prose ol li {
  list-style: decimal;
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.side-shots {
  display: grid;
  gap: 14px;
}

.side-shots img {
  border-radius: 14px;
  border: 1px solid var(--line);
}

.cta-band {
  margin: 20px 0 40px;
  padding: 36px 28px;
  border-radius: 20px;
  background:
    linear-gradient(120deg, rgba(196, 59, 78, 0.22), rgba(22, 18, 20, 0.95)),
    var(--bg-soft);
  border: 1px solid rgba(196, 59, 78, 0.35);
  text-align: center;
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 10px;
}

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

.page-hero {
  padding: 48px 0 20px;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 10px;
  font-weight: 400;
}

.page-hero p {
  color: var(--muted);
  max-width: 46rem;
}

.breadcrumb {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

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

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: #0a0809;
  padding: 40px 0 28px;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

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

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

.site-footer h4 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.site-footer ul li {
  margin-bottom: 8px;
}

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  color: #8f7f84;
  font-size: 0.85rem;
  text-align: center;
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 60px 0;
}

.error-page .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--accent-2);
  line-height: 1;
  margin-bottom: 8px;
}

.error-page h1 {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

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

.age-tip {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: #f0c4cb;
  font-size: 0.88rem;
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 22px;
}

.toc strong {
  display: block;
  margin-bottom: 8px;
}

.toc a {
  display: inline-block;
  margin: 4px 10px 4px 0;
  color: var(--muted);
}

.faq details {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

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

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

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

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

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

  .trust-bar {
    grid-template-columns: 1fr 1fr;
  }

  .hero-visual img {
    max-height: 520px;
  }
}

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

  .nav-links {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #171214;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 8px;
    box-shadow: var(--shadow);
  }

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

  .nav-links a {
    padding: 12px 14px;
    border-radius: 10px;
  }

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

  .feature-grid,
  .step-grid,
  .trust-bar,
  .shot-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    padding-top: 36px;
  }

  .section {
    padding: 40px 0;
  }
}