:root {
  --momo-pink: #ff7eb3;
  --momo-pink-light: #ffb3d1;
  --momo-pink-dark: #e85d9a;
  --momo-peach: #ffd6e8;
  --momo-lavender: #c9b6ff;
  --momo-mint: #a8e6cf;
  --momo-cream: #fff5f9;
  --momo-bg: #fff9fc;
  --momo-bg-alt: #fff0f6;
  --momo-card: rgba(255, 255, 255, 0.72);
  --momo-card-solid: #ffffff;
  --momo-text: #3d2c3a;
  --momo-text-secondary: #7a6b78;
  --momo-text-light: #a89ba6;
  --momo-border: rgba(255, 126, 179, 0.18);
  --momo-shadow: 0 8px 32px rgba(255, 126, 179, 0.12);
  --momo-shadow-hover: 0 16px 48px rgba(255, 126, 179, 0.22);
  --momo-radius: 20px;
  --momo-radius-sm: 12px;
  --momo-radius-lg: 28px;
  --momo-glass: rgba(255, 255, 255, 0.55);
  --momo-glass-border: rgba(255, 255, 255, 0.65);
  --momo-gradient: linear-gradient(135deg, #ff7eb3 0%, #ffb3d1 40%, #c9b6ff 100%);
  --momo-gradient-2: linear-gradient(135deg, #ffd6e8 0%, #c9b6ff 100%);
  --momo-gradient-hero: linear-gradient(160deg, #fff0f6 0%, #ffe0ee 30%, #f0e6ff 70%, #e8f4ff 100%);
  --momo-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --momo-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --momo-header-h: 72px;
}

[data-theme="dark"] {
  --momo-pink: #ff9ec4;
  --momo-pink-light: #ffb8d6;
  --momo-pink-dark: #e87aa8;
  --momo-peach: #4a3040;
  --momo-lavender: #9b8ec4;
  --momo-mint: #7ec4a8;
  --momo-cream: #1e1622;
  --momo-bg: #14101a;
  --momo-bg-alt: #1c1624;
  --momo-card: rgba(40, 30, 48, 0.72);
  --momo-card-solid: #241c30;
  --momo-text: #f0e6f0;
  --momo-text-secondary: #b8a8b8;
  --momo-text-light: #80708a;
  --momo-border: rgba(255, 158, 196, 0.15);
  --momo-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --momo-shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5);
  --momo-glass: rgba(36, 28, 48, 0.6);
  --momo-glass-border: rgba(255, 158, 196, 0.12);
  --momo-gradient: linear-gradient(135deg, #c45a8a 0%, #9b6bb5 40%, #7a6bb5 100%);
  --momo-gradient-2: linear-gradient(135deg, #4a3040 0%, #3a2a50 100%);
  --momo-gradient-hero: linear-gradient(160deg, #1e1622 0%, #2a1e30 30%, #241c38 70%, #1a1a2a 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--momo-header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--momo-font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--momo-text);
  background: var(--momo-bg);
  overflow-x: hidden;
  transition: background var(--momo-transition), color var(--momo-transition);
}

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

a {
  color: var(--momo-pink-dark);
  text-decoration: none;
  transition: color var(--momo-transition), opacity var(--momo-transition);
}

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, button {
  font-size: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========== HEADER ========== */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--momo-header-h);
  background: var(--momo-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--momo-glass-border);
  transition: background var(--momo-transition), box-shadow var(--momo-transition), border-color var(--momo-transition);
}

#site-header.scrolled {
  box-shadow: var(--momo-shadow);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
  transition: transform var(--momo-transition);
}

.brand:hover {
  transform: scale(1.04);
}

.brand svg {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(255, 126, 179, 0.35);
  transition: box-shadow var(--momo-transition), transform var(--momo-transition);
}

.brand:hover svg {
  box-shadow: 0 6px 24px rgba(255, 126, 179, 0.5);
  transform: rotate(-8deg);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--momo-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

#main-nav {
  flex: 1;
  min-width: 0;
}

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--momo-text-secondary);
  border-radius: var(--momo-radius-sm);
  white-space: nowrap;
  transition: color var(--momo-transition), background var(--momo-transition), transform var(--momo-transition);
}

#main-nav a:hover {
  color: var(--momo-pink-dark);
  background: rgba(255, 126, 179, 0.1);
  transform: translateY(-2px);
}

#site-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  background: var(--momo-card);
  border: 1px solid var(--momo-border);
  border-radius: 999px;
  overflow: hidden;
  transition: border-color var(--momo-transition), box-shadow var(--momo-transition);
}

#site-search:focus-within {
  border-color: var(--momo-pink);
  box-shadow: 0 0 0 4px rgba(255, 126, 179, 0.15);
}

#search-input {
  width: 180px;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--momo-text);
  outline: none;
  font-size: 0.875rem;
  transition: width var(--momo-transition);
}

#search-input::placeholder {
  color: var(--momo-text-light);
}

#search-input:focus {
  width: 220px;
}

#site-search button {
  padding: 8px 16px;
  background: var(--momo-gradient);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 999px;
  margin: 3px;
  transition: opacity var(--momo-transition), transform var(--momo-transition);
}

#site-search button:hover {
  opacity: 0.88;
  transform: scale(1.05);
}

#theme-toggle,
#menu-toggle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: var(--momo-card);
  border: 1px solid var(--momo-border);
  flex-shrink: 0;
  transition: background var(--momo-transition), transform var(--momo-transition), box-shadow var(--momo-transition);
}

#theme-toggle:hover,
#menu-toggle:hover {
  background: rgba(255, 126, 179, 0.15);
  transform: scale(1.1) rotate(12deg);
  box-shadow: 0 4px 16px rgba(255, 126, 179, 0.25);
}

#menu-toggle {
  display: none;
}

/* ========== MAIN ========== */
main {
  padding-top: var(--momo-header-h);
}

/* ========== HERO ========== */
.hero {
  position: relative;
  padding: 60px 24px 40px;
  background: var(--momo-gradient-hero);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 126, 179, 0.25) 0%, transparent 70%);
  pointer-events: none;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 182, 255, 0.22) 0%, transparent 70%);
  pointer-events: none;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.06); }
}

.hero-carousel {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  min-height: 360px;
}

.slide {
  display: none;
  animation: slideIn 0.6s ease forwards;
}

.slide.active {
  display: block;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide h1,
.slide h2 {
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 20px;
  background: var(--momo-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  max-width: 800px;
}

.slide p {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: var(--momo-text-secondary);
  max-width: 720px;
  margin-bottom: 28px;
  line-height: 1.85;
}

.cta {
  display: inline-block;
  padding: 14px 36px;
  background: var(--momo-gradient);
  color: #fff !important;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 999px;
  box-shadow: 0 8px 28px rgba(255, 126, 179, 0.35);
  transition: transform var(--momo-transition), box-shadow var(--momo-transition), filter var(--momo-transition);
  position: relative;
  overflow: hidden;
}

.cta::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transition: left 0.6s ease;
}

.cta:hover::after {
  left: 100%;
}

.cta:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 40px rgba(255, 126, 179, 0.5);
  filter: brightness(1.05);
}

.carousel-dots {
  display: flex;
  gap: 10px;
  margin-top: 32px;
}

.carousel-dots button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 126, 179, 0.3);
  transition: all var(--momo-transition);
  position: relative;
}

.carousel-dots button.active {
  width: 36px;
  border-radius: 999px;
  background: var(--momo-gradient);
  box-shadow: 0 2px 10px rgba(255, 126, 179, 0.4);
}

.carousel-dots button:hover {
  background: var(--momo-pink);
  transform: scale(1.15);
}

.anchor-nav {
  max-width: 1280px;
  margin: 40px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.anchor-nav a {
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--momo-text-secondary);
  background: var(--momo-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--momo-glass-border);
  border-radius: 999px;
  transition: all var(--momo-transition);
}

.anchor-nav a:hover {
  color: #fff;
  background: var(--momo-gradient);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 126, 179, 0.35);
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--momo-text-light);
}

.breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--momo-pink-light);
  font-weight: 700;
}

.breadcrumb a {
  color: var(--momo-text-secondary);
  transition: color var(--momo-transition);
}

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

/* ========== SECTIONS ========== */
main > section:not(.hero):not(.breadcrumb) {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px;
}

main > section:nth-child(odd):not(.hero):not(.breadcrumb) {
  background: transparent;
}

main > section:nth-child(even):not(.hero):not(.breadcrumb) {
  background: var(--momo-bg-alt);
  border-radius: var(--momo-radius-lg);
  margin-top: 8px;
  margin-bottom: 8px;
}

section h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 800;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 16px;
  color: var(--momo-text);
  line-height: 1.4;
}

section h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 4px;
  border-radius: 999px;
  background: var(--momo-gradient);
  transition: width var(--momo-transition);
}

section:hover h2::after {
  width: 100px;
}

section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--momo-pink-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

section h3::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--momo-gradient);
  flex-shrink: 0;
}

section p {
  color: var(--momo-text-secondary);
  margin-bottom: 14px;
  line-height: 1.85;
}

section > p:first-of-type {
  font-size: 1.02rem;
}

/* ========== CARDS ========== */
section article {
  background: var(--momo-card);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--momo-glass-border);
  border-radius: var(--momo-radius);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--momo-shadow);
  transition: transform var(--momo-transition), box-shadow var(--momo-transition), border-color var(--momo-transition);
  position: relative;
  overflow: hidden;
}

section article::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--momo-gradient);
  opacity: 0;
  transition: opacity var(--momo-transition);
}

section article:hover {
  transform: translateY(-6px);
  box-shadow: var(--momo-shadow-hover);
  border-color: rgba(255, 126, 179, 0.35);
}

section article:hover::before {
  opacity: 1;
}

section article h3 {
  margin-top: 0;
}

section article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 8px;
  padding: 6px 18px;
  border-radius: 999px;
  background: rgba(255, 126, 179, 0.1);
  transition: all var(--momo-transition);
}

section article a:hover {
  background: var(--momo-gradient);
  color: #fff;
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(255, 126, 179, 0.3);
}

/* ========== NEWS ARTICLES ========== */
#news article {
  padding: 24px 28px;
}

#news article p:first-of-type {
  font-size: 0.82rem;
  color: var(--momo-text-light);
  font-weight: 500;
  margin-bottom: 8px;
}

/* ========== BLOCKQUOTE ========== */
blockquote {
  background: var(--momo-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-left: 4px solid var(--momo-pink);
  border-radius: 0 var(--momo-radius-sm) var(--momo-radius-sm) 0;
  padding: 20px 24px;
  margin: 16px 0;
  box-shadow: var(--momo-shadow);
  transition: transform var(--momo-transition), box-shadow var(--momo-transition);
}

blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--momo-shadow-hover);
}

blockquote p {
  font-style: italic;
  color: var(--momo-text);
  margin: 0;
}

/* ========== FAQ DETAILS ========== */
#faq details {
  background: var(--momo-card);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--momo-glass-border);
  border-radius: var(--momo-radius);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--momo-shadow);
  transition: box-shadow var(--momo-transition), border-color var(--momo-transition);
}

#faq details:hover {
  box-shadow: var(--momo-shadow-hover);
  border-color: rgba(255, 126, 179, 0.3);
}

#faq details[open] {
  border-color: var(--momo-pink);
  box-shadow: 0 8px 32px rgba(255, 126, 179, 0.18);
}

#faq summary {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--momo-text);
  transition: background var(--momo-transition), color var(--momo-transition);
  list-style: none;
  position: relative;
  user-select: none;
}

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

#faq summary::before {
  content: "＋";
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--momo-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform var(--momo-transition), background var(--momo-transition);
}

#faq details[open] summary::before {
  content: "－";
  transform: rotate(180deg);
}

#faq summary:hover {
  background: rgba(255, 126, 179, 0.06);
  color: var(--momo-pink-dark);
}

#faq details[open] summary {
  background: rgba(255, 126, 179, 0.08);
  color: var(--momo-pink-dark);
}

#faq details p {
  padding: 0 24px 20px 64px;
  margin: 0;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== HOWTO ========== */
#howto ol {
  counter-reset: howto;
  list-style: none;
  padding: 0;
}

#howto ol li {
  counter-increment: howto;
  position: relative;
  padding: 16px 20px 16px 68px;
  margin-bottom: 12px;
  background: var(--momo-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--momo-glass-border);
  border-radius: var(--momo-radius-sm);
  color: var(--momo-text-secondary);
  box-shadow: var(--momo-shadow);
  transition: transform var(--momo-transition), box-shadow var(--momo-transition), border-color var(--momo-transition);
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--momo-gradient);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(255, 126, 179, 0.3);
  transition: transform var(--momo-transition), box-shadow var(--momo-transition);
}

#howto ol li:hover {
  transform: translateX(8px);
  box-shadow: var(--momo-shadow-hover);
  border-color: rgba(255, 126, 179, 0.35);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.12);
  box-shadow: 0 6px 20px rgba(255, 126, 179, 0.5);
}

/* ========== CONTACT ========== */
#contact address {
  font-style: normal;
}

#contact address ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

#contact address li {
  padding: 14px 20px;
  background: var(--momo-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--momo-glass-border);
  border-radius: var(--momo-radius-sm);
  color: var(--momo-text-secondary);
  font-size: 0.92rem;
  box-shadow: var(--momo-shadow);
  transition: transform var(--momo-transition), box-shadow var(--momo-transition), border-color var(--momo-transition);
}

#contact address li:hover {
  transform: translateY(-4px);
  box-shadow: var(--momo-shadow-hover);
  border-color: rgba(255, 126, 179, 0.3);
}

/* ========== SITEMAP & LINKS ========== */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap a,
#links a {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--momo-text-secondary);
  background: var(--momo-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--momo-glass-border);
  border-radius: 999px;
  box-shadow: var(--momo-shadow);
  transition: all var(--momo-transition);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  background: var(--momo-gradient);
  border-color: transparent;
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 8px 24px rgba(255, 126, 179, 0.35);
}

/* ========== FOOTER ========== */
#site-footer {
  background: var(--momo-gradient-hero);
  border-top: 1px solid var(--momo-border);
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 126, 179, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 24px;
  text-align: center;
}

.footer-inner p {
  color: var(--momo-text-secondary);
  font-size: 0.88rem;
  margin-bottom: 8px;
  line-height: 1.7;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.footer-inner nav a {
  padding: 6px 16px;
  font-size: 0.82rem;
  color: var(--momo-text-secondary);
  border-radius: 999px;
  transition: all var(--momo-transition);
}

.footer-inner nav a:hover {
  color: var(--momo-pink-dark);
  background: rgba(255, 126, 179, 0.1);
  transform: translateY(-2px);
}

/* ========== BACK TO TOP ========== */
#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--momo-gradient);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 28px rgba(255, 126, 179, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all var(--momo-transition);
  z-index: 999;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 14px 40px rgba(255, 126, 179, 0.55);
}

#back-to-top:active {
  transform: translateY(-2px) scale(1.02);
}

/* ========== SCROLL ANIMATIONS ========== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .header-inner {
    gap: 12px;
    padding: 0 16px;
  }

  #main-nav ul {
    gap: 2px;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.82rem;
  }

  #search-input {
    width: 140px;
  }

  #search-input:focus {
    width: 170px;
  }

  .hero {
    padding: 40px 16px 32px;
  }

  main > section:not(.hero):not(.breadcrumb) {
    padding: 44px 16px;
  }
}

@media (max-width: 820px) {
  :root {
    --momo-header-h: 64px;
  }

  #main-nav {
    position: fixed;
    top: var(--momo-header-h);
    left: 0;
    right: 0;
    background: var(--momo-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--momo-glass-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding var(--momo-transition);
    box-shadow: var(--momo-shadow);
    z-index: 999;
  }

  #main-nav.open {
    max-height: 520px;
    padding: 12px 0;
    overflow-y: auto;
  }

  #main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0 16px;
  }

  #main-nav a {
    padding: 14px 16px;
    font-size: 0.95rem;
    border-radius: var(--momo-radius-sm);
    width: 100%;
  }

  #menu-toggle {
    display: flex;
  }

  #site-search {
    flex: 1;
    min-width: 0;
  }

  #search-input {
    width: 100%;
    min-width: 0;
  }

  #search-input:focus {
    width: 100%;
  }

  #site-search button {
    display: none;
  }

  .hero-carousel {
    min-height: auto;
  }

  .slide h1,
  .slide h2 {
    font-size: clamp(1.3rem, 5vw, 1.8rem);
  }

  .slide p {
    font-size: 0.95rem;
  }

  .cta {
    padding: 12px 28px;
    font-size: 0.92rem;
  }

  .anchor-nav {
    gap: 8px;
    margin-top: 28px;
  }

  .anchor-nav a {
    padding: 6px 14px;
    font-size: 0.78rem;
  }

  section article {
    padding: 20px;
  }

  #contact address ul {
    grid-template-columns: 1fr;
  }

  #faq summary {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  #faq details p {
    padding: 0 18px 18px 54px;
  }

  #howto ol li {
    padding: 14px 16px 14px 60px;
  }

  #back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 520px) {
  .header-inner {
    gap: 8px;
    padding: 0 12px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .brand svg {
    width: 34px;
    height: 34px;
  }

  #theme-toggle,
  #menu-toggle {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  #site-search {
    display: none;
  }

  .hero {
    padding: 28px 12px 24px;
  }

  main > section:not(.hero):not(.breadcrumb) {
    padding: 32px 12px;
  }

  section h2 {
    font-size: 1.25rem;
  }

  section h3 {
    font-size: 1.02rem;
  }

  section article {
    padding: 16px;
    border-radius: var(--momo-radius-sm);
  }

  .breadcrumb {
    padding: 12px;
  }

  .footer-inner {
    padding: 28px 12px;
  }

  .footer-inner nav {
    gap: 4px;
  }

  .footer-inner nav a {
    padding: 5px 10px;
    font-size: 0.76rem;
  }
}

/* ========== ACCESSIBILITY ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

:focus-visible {
  outline: 3px solid var(--momo-pink);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(255, 126, 179, 0.3);
  color: var(--momo-text);
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--momo-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--momo-gradient);
  border-radius: 999px;
  border: 2px solid var(--momo-bg-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--momo-pink-dark);
}

/* ========== PRINT ========== */
@media print {
  #site-header,
  #back-to-top,
  .anchor-nav,
  .carousel-dots,
  #site-search,
  #theme-toggle,
  #menu-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  main {
    padding-top: 0;
  }

  section article,
  #faq details,
  blockquote {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}