:root {
  --bg: #f7f4f1;
  --bg-soft: #efe9e3;
  --surface: #ffffff;
  --text: #1a1614;
  --muted: #5c534c;
  --accent: #c43d5a;
  --accent-dark: #9e2d45;
  --line: #e4dbd2;
  --shadow: 0 12px 32px rgba(26, 22, 20, 0.08);
  --radius: 14px;
  --max: 1120px;
  --font: "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);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(196, 61, 90, 0.12), transparent 38%),
    radial-gradient(circle at 88% 0%, rgba(196, 61, 90, 0.08), transparent 32%),
    linear-gradient(180deg, #faf7f4 0%, var(--bg) 40%, #f3eee9 100%);
  line-height: 1.75;
}

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

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

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(247, 244, 241, 0.92);
  border-bottom: 1px solid var(--line);
}

.nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

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

.brand:hover {
  text-decoration: none;
  color: var(--accent-dark);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  color: var(--text);
}

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

.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);
}

.hero {
  padding: 2.8rem 0 2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem;
  align-items: center;
}

.hero-copy h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

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

.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: 0.85rem 1.25rem;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line);
}

.btn-secondary:hover {
  color: var(--accent-dark);
}

.hero-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.section {
  padding: 2.4rem 0;
}

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

.section-head h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  line-height: 1.3;
}

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

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem 1.5rem;
}

.prose h2,
.prose h3 {
  margin-top: 1.8rem;
  margin-bottom: 0.7rem;
  line-height: 1.35;
}

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

.prose p {
  margin: 0 0 1rem;
  color: var(--text);
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--muted);
}

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

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

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

.feature-card .body {
  padding: 1rem 1.05rem 1.15rem;
}

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

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

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

.shot-grid figure {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

.shot-grid figcaption {
  padding: 0.75rem 0.85rem;
  font-size: 0.9rem;
  color: var(--muted);
}

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

.vlog-grid img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

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

.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.step .num {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(196, 61, 90, 0.12);
  color: var(--accent-dark);
  font-weight: 800;
  margin-bottom: 0.7rem;
}

.step h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

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

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.7rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.faq p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 1.2rem 0 1.6rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.45rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.site-footer {
  margin-top: 2rem;
  padding: 2rem 0 2.4rem;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

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

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

.site-footer p,
.site-footer a {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin-bottom: 0.4rem;
}

.copyright {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

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

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

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

.page-hero {
  padding: 2rem 0 0.5rem;
}

.page-hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
}

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

.breadcrumb {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.9rem;
}

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

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

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

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

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0 0.75rem;
    background: rgba(247, 244, 241, 0.98);
    border: 1px solid var(--line);
    border-radius: 0 0 12px 12px;
    box-shadow: var(--shadow);
    z-index: 60;
  }

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

  .nav-links a {
    padding: 0.7rem 1rem;
  }

  .nav {
    flex-wrap: nowrap;
  }

  .hero {
    padding-top: 1.6rem;
  }

  .panel {
    padding: 1.1rem;
  }

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

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