:root {
  --bg: #f7f3ef;
  --bg-deep: #ebe4dc;
  --surface: #fffdfb;
  --ink: #1a1512;
  --muted: #6b5e56;
  --line: #e2d8ce;
  --accent: #c41e3a;
  --accent-dark: #9a1830;
  --accent-soft: #fce8eb;
  --shadow: 0 12px 40px rgba(26, 21, 18, 0.08);
  --radius: 14px;
  --max: 1120px;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(196, 30, 58, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(196, 30, 58, 0.05), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  background-attachment: fixed;
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--accent-dark);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(247, 243, 239, 0.92);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  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(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

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

.nav a {
  color: var(--muted);
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

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

/* Hero */
.hero {
  padding: 3.5rem 0 2.5rem;
  position: relative;
  overflow: hidden;
}

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

.hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  line-height: 1.25;
  margin: 0 0 1rem;
  letter-spacing: 0.01em;
}

.hero-copy .lead {
  font-size: 1.08rem;
  color: var(--muted);
  margin: 0 0 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: 0.85rem 1.35rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 10px 28px rgba(196, 30, 58, 0.28);
}

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

.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
}

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

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 8% -6% -8% 8%;
  background: linear-gradient(145deg, rgba(196, 30, 58, 0.18), transparent 60%);
  border-radius: 28px;
  z-index: 0;
  animation: pulseGlow 5s ease-in-out infinite;
}

.hero-visual img {
  position: relative;
  z-index: 1;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.6);
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  object-position: top;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
}

@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: 3rem 0;
}

.section-head {
  margin-bottom: 1.75rem;
  max-width: 46rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 1.95rem);
  margin: 0 0 0.65rem;
  line-height: 1.35;
}

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

.section.alt {
  background: rgba(255, 253, 251, 0.55);
  border-block: 1px solid var(--line);
}

/* Feature cards / gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.shot {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease;
}

.shot:hover {
  transform: translateY(-4px);
}

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

.shot figcaption {
  padding: 0.85rem 1rem 1rem;
}

.shot h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-family: var(--font-display);
}

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

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 2rem;
}

.feature-row:nth-child(even) {
  direction: rtl;
}

.feature-row:nth-child(even) > * {
  direction: ltr;
}

.feature-row img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  max-height: 480px;
  width: 100%;
  object-fit: cover;
  object-position: top;
}

.feature-text h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 0.75rem;
}

.feature-text p {
  color: var(--muted);
  margin: 0 0 0.85rem;
}

.feature-text ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.feature-text li {
  margin-bottom: 0.35rem;
}

/* Content prose */
.prose {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(1.25rem, 3vw, 2.25rem);
  box-shadow: var(--shadow);
}

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  scroll-margin-top: 5rem;
}

.prose h2 {
  font-size: 1.45rem;
  margin: 2rem 0 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--line);
}

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

.prose h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.65rem;
}

.prose p {
  margin: 0 0 1rem;
  color: #3d342f;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: #3d342f;
}

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

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

.prose .toc h3 {
  margin-top: 0;
}

.prose .toc ol {
  margin-bottom: 0;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.tag-cloud a {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

.tag-cloud a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Steps */
.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: var(--radius);
  padding: 1.25rem;
  position: relative;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

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

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

/* FAQ */
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.95rem 1.1rem;
  margin-bottom: 0.7rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 700;
}

.faq details[open] summary::after {
  content: "–";
}

.faq details p {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

/* Page hero compact */
.page-hero {
  padding: 2.5rem 0 1.5rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin: 0 0 0.6rem;
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 40rem;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

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

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

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

.error-page .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  line-height: 1;
  color: var(--accent);
  margin: 0;
}

.error-page h1 {
  font-family: var(--font-display);
  margin: 0.5rem 0 0.75rem;
}

.error-page p {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

/* Footer */
.site-footer {
  margin-top: 2rem;
  background: #1a1512;
  color: #d6cfc8;
  padding: 2.5rem 0 1.5rem;
}

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

.site-footer h3 {
  font-family: var(--font-display);
  color: #fff;
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
}

.site-footer p,
.site-footer li {
  color: #b7aea6;
  font-size: 0.9rem;
}

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

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

.site-footer a {
  color: #d6cfc8;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #8f857c;
}

.notice {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 0.9rem 1rem;
  border-radius: 0 10px 10px 0;
  margin: 1rem 0;
  color: #5c2a33;
  font-size: 0.92rem;
}

/* Mobile */
@media (max-width: 900px) {
  .hero-grid,
  .feature-row,
  .feature-row:nth-child(even),
  .footer-grid {
    grid-template-columns: 1fr;
    direction: ltr;
  }

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

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

  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 253, 251, 0.98);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem 1rem;
    gap: 0.25rem;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.75rem 0.9rem;
  }

  .hero {
    padding-top: 2rem;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual img {
    max-height: 380px;
  }
}

@media (max-width: 560px) {
  .gallery,
  .steps {
    grid-template-columns: 1fr;
  }

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

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}