:root {
  --bg: #f7f3ef;
  --bg-soft: #fffaf6;
  --surface: #ffffff;
  --text: #1c1917;
  --muted: #6b635c;
  --line: #e8ddd3;
  --brand: #c45c4a;
  --brand-deep: #9a3f31;
  --accent: #2a6f7a;
  --shadow: 0 12px 40px rgba(28, 25, 23, 0.08);
  --radius: 14px;
  --max: 1120px;
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", serif;
  --font-body: "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 10% -10%, #f3d7cf 0%, transparent 55%),
    radial-gradient(900px 420px at 100% 0%, #d9e8ea 0%, transparent 50%),
    var(--bg);
  line-height: 1.75;
}

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

a {
  color: var(--brand-deep);
  text-decoration: none;
}

a:hover {
  color: var(--brand);
  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, 243, 239, 0.88);
  border-bottom: 1px solid var(--line);
}

#ads-bar {
  position: sticky;
  top: 64px;
  z-index: 45;
  background: rgba(247, 243, 239, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}

#ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  background: transparent;
  margin: 0;
  gap: 4px 2px;
}

#ads > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 70px;
  box-sizing: border-box;
}

#ads figure {
  margin: 0;
}

#ads img {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(24, 24, 24, 0.12);
  transition: transform 180ms ease, box-shadow 180ms ease;
  display: block;
  border: none;
  background: linear-gradient(135deg, #fff, #fff);
}

#ads a {
  display: inline-block;
  text-decoration: none;
  border-radius: 15px;
}

#ads img:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 10px 24px rgba(24, 24, 24, 0.18);
}

#ads figcaption,
#ads .caption {
  height: 15px;
  font-size: 11px;
  color: #666;
  text-align: center;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 4px;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

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

.brand-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text);
  flex-shrink: 0;
}

.nav-toggle svg {
  display: block;
  width: 36px;
  height: 36px;
  fill: currentColor;
}

.nav-toggle .bar {
  transform-origin: center;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .bar-1 {
  transform: translateY(5.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .bar-2 {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .bar-3 {
  transform: translateY(-5.75px) rotate(-45deg);
}

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

.nav-menu a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

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

.hero {
  padding: 2.8rem 0 1.5rem;
}

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

.hero-copy h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.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;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  transition: 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  color: #fff;
  box-shadow: 0 10px 24px rgba(154, 63, 49, 0.25);
}

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

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

.btn-ghost:hover {
  text-decoration: none;
  border-color: var(--brand);
  color: var(--brand-deep);
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 18px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.section {
  padding: 2.4rem 0;
}

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

.section-head h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  line-height: 1.35;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 48rem;
}

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

.prose p {
  margin: 0 0 1rem;
  color: #3f3a36;
}

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  margin: 1.8rem 0 0.7rem;
  line-height: 1.35;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: #3f3a36;
}

.prose li {
  margin-bottom: 0.4rem;
}

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

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

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

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

.card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

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

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

.card-body h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-family: var(--font-display);
}

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

.feature-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.15rem;
}

.feature-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  font-family: var(--font-display);
}

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

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

.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem;
  position: relative;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #f0d7d1;
  color: var(--brand-deep);
  font-weight: 700;
  margin-bottom: 0.6rem;
  font-size: 0.85rem;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

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

.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: 600;
}

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

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.8rem;
}

.chip {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: #f4e6e1;
  color: var(--brand-deep);
  font-size: 0.88rem;
  text-decoration: none;
}

.chip:hover {
  background: #ebd4cd;
  text-decoration: none;
}

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

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

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

.site-footer {
  margin-top: 2.5rem;
  border-top: 1px solid var(--line);
  background: #efe8e1;
  padding: 2rem 0 1.5rem;
}

.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;
  font-family: var(--font-display);
}

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

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

.site-footer li {
  margin-bottom: 0.35rem;
}

.copyright {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid #e0d5cb;
  color: var(--muted);
  font-size: 0.85rem;
}

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

.error-page h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 0.6rem;
}

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

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

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

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
    width: 36px;
    height: 36px;
  }

  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.4rem 0 0.6rem;
  }

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

  .nav-wrap {
    flex-wrap: wrap;
  }

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

  .hero {
    padding-top: 1.6rem;
  }

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