:root {
  --pink: #ff4d94;
  --pink-deep: #e91e75;
  --pink-soft: #fff0f6;
  --pink-mid: #ffb3d1;
  --text: #1a1a1a;
  --text-muted: #666;
  --border: #f0d0de;
  --bg: #ffffff;
  --bg-alt: #fff7fa;
  --shadow: 0 8px 28px rgba(233, 30, 117, 0.12);
  --radius: 14px;
  --max: 1120px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, #ffe4ef 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, #ffeaf3 0%, transparent 45%),
    linear-gradient(180deg, #fff 0%, var(--bg-alt) 40%, #fff 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

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

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

ul {
  list-style: none;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 110;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
}

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

.brand span {
  background: linear-gradient(120deg, var(--pink-deep), #ff7eb3);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav a {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-cta {
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  color: #fff !important;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(233, 30, 117, 0.35);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--pink-deep);
}

/* Hero */
.hero {
  padding: 3.2rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--pink-soft);
  color: var(--pink-deep);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.55rem);
  line-height: 1.3;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  color: #fff;
  box-shadow: 0 8px 22px rgba(233, 30, 117, 0.35);
}

.btn-secondary {
  background: #fff;
  color: var(--pink-deep);
  border: 1.5px solid var(--pink-mid);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.hero-float {
  position: absolute;
  right: -3%;
  bottom: -6%;
  width: 42%;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 2px solid #fff;
  animation: floatY 4.5s ease-in-out infinite;
}

@keyframes floatY {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  animation: fadeUp 0.7s ease both;
}

.reveal-delay {
  animation-delay: 0.15s;
}

/* Sections */
.section {
  padding: 3.2rem 0;
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(255, 240, 246, 0.65), transparent);
}

.section-head {
  text-align: center;
  margin-bottom: 2rem;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  margin-bottom: 0.6rem;
}

.section-head p {
  color: var(--text-muted);
  max-width: 42em;
  margin-inline: auto;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.55rem;
  color: var(--pink-deep);
}

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

.shot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.shot-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}

.shot-card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  background: var(--pink-soft);
}

.shot-card .cap {
  padding: 0.9rem 1rem 1.1rem;
}

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

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

.prose {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
}

.prose h2,
.prose h3 {
  margin: 1.6rem 0 0.75rem;
  scroll-margin-top: 5rem;
}

.prose h2:first-child,
.prose > h2:first-of-type {
  margin-top: 0;
}

.prose p {
  margin-bottom: 1rem;
  color: #333;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem 1.25rem;
  list-style: disc;
}

.prose li {
  margin-bottom: 0.45rem;
  color: #333;
}

.prose strong {
  color: var(--text);
}

.toc {
  background: var(--pink-soft);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin-bottom: 1.5rem;
}

.toc h3 {
  margin: 0 0 0.5rem !important;
  font-size: 1rem;
}

.toc ol {
  margin: 0 0 0 1.1rem;
  columns: 2;
  gap: 1.5rem;
}

.toc a {
  font-weight: 500;
}

.cta-band {
  margin: 2rem 0;
  padding: 1.75rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #ff7eb3, var(--pink-deep));
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.cta-band h2 {
  color: #fff;
  margin-bottom: 0.5rem;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 1rem;
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--pink-deep);
  box-shadow: none;
}

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

.step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
}

.step-num {
  width: 36px;
  height: 36px;
  margin: 0 auto 0.7rem;
  border-radius: 50%;
  background: var(--pink-soft);
  color: var(--pink-deep);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.faq details {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.95rem 1.1rem;
  margin-bottom: 0.75rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}

.faq details[open] summary {
  color: var(--pink-deep);
  margin-bottom: 0.5rem;
}

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

.related {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.related a {
  display: block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  color: var(--text);
  font-weight: 600;
}

.related a:hover {
  border-color: var(--pink);
  color: var(--pink-deep);
}

.related span {
  display: block;
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 0.25rem;
}

/* Page hero (inner pages) */
.page-hero {
  padding: 2.4rem 0 1.2rem;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: 0.55rem;
}

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

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

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

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

/* Error pages */
.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page .code {
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--pink), var(--pink-deep));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
}

.error-page h1 {
  margin-bottom: 0.75rem;
}

.error-page p {
  color: var(--text-muted);
  margin-bottom: 1.4rem;
  max-width: 28em;
}

/* Footer */
.site-footer {
  margin-top: 3rem;
  background: #1f1520;
  color: #f5e8ee;
  padding: 2.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.85rem;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.footer-brand strong {
  font-size: 1.1rem;
}

.site-footer p {
  color: #c9b4bf;
  font-size: 0.92rem;
}

.site-footer h4 {
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.site-footer ul li {
  margin-bottom: 0.45rem;
}

.site-footer a {
  color: #f0d6e2;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.1rem;
  text-align: center;
  color: #b39aa6;
  font-size: 0.85rem;
}

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

  .hero-float {
    display: none;
  }

  .toc ol {
    columns: 1;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem 1rem;
    gap: 0;
    display: none;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid #f7e6ee;
  }

  .nav-cta {
    text-align: center;
    margin-top: 0.5rem;
  }

  .hero {
    padding-top: 1.8rem;
  }

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

  .prose {
    padding: 1.25rem 1rem;
  }

  .section {
    padding: 2.4rem 0;
  }
}