:root {
  --sakura-primary: #e8546b;
  --sakura-primary-light: #f07a8c;
  --sakura-primary-dark: #c93d52;
  --sakura-accent: #f7c948;
  --sakura-accent-light: #f9d96e;
  --sakura-bg: #fdf8f9;
  --sakura-bg-alt: #fff5f7;
  --sakura-surface: #ffffff;
  --sakura-surface-glass: rgba(255, 255, 255, 0.72);
  --sakura-surface-glass-strong: rgba(255, 255, 255, 0.88);
  --sakura-text: #2e2e38;
  --sakura-text-secondary: #5a5a6e;
  --sakura-text-muted: #8a8a9e;
  --sakura-border: rgba(232, 84, 107, 0.12);
  --sakura-border-strong: rgba(232, 84, 107, 0.22);
  --sakura-shadow-sm: 0 2px 8px rgba(46, 46, 56, 0.06);
  --sakura-shadow-md: 0 8px 24px rgba(46, 46, 56, 0.08);
  --sakura-shadow-lg: 0 16px 48px rgba(46, 46, 56, 0.12);
  --sakura-shadow-glow: 0 8px 32px rgba(232, 84, 107, 0.18);
  --sakura-radius-sm: 8px;
  --sakura-radius-md: 14px;
  --sakura-radius-lg: 22px;
  --sakura-radius-xl: 32px;
  --sakura-radius-pill: 999px;
  --sakura-transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --sakura-transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --sakura-transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --sakura-gradient-primary: linear-gradient(135deg, #e8546b 0%, #f07a8c 40%, #f7c948 100%);
  --sakura-gradient-soft: linear-gradient(135deg, #fff5f7 0%, #fdf8f9 50%, #fff9f0 100%);
  --sakura-gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.55) 100%);
  --sakura-gradient-dark: linear-gradient(135deg, #1a1a24 0%, #2e2e38 100%);
  --sakura-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --sakura-header-h: 72px;
}

[data-theme="dark"] {
  --sakura-primary: #f07a8c;
  --sakura-primary-light: #f5a0ae;
  --sakura-primary-dark: #e8546b;
  --sakura-accent: #f9d96e;
  --sakura-accent-light: #fce8a0;
  --sakura-bg: #14141c;
  --sakura-bg-alt: #1a1a24;
  --sakura-surface: #1e1e2a;
  --sakura-surface-glass: rgba(30, 30, 42, 0.72);
  --sakura-surface-glass-strong: rgba(30, 30, 42, 0.88);
  --sakura-text: #eaeaf0;
  --sakura-text-secondary: #b8b8c8;
  --sakura-text-muted: #7a7a8e;
  --sakura-border: rgba(240, 122, 140, 0.14);
  --sakura-border-strong: rgba(240, 122, 140, 0.26);
  --sakura-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --sakura-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --sakura-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --sakura-shadow-glow: 0 8px 32px rgba(240, 122, 140, 0.22);
  --sakura-gradient-soft: linear-gradient(135deg, #1a1a24 0%, #14141c 50%, #1e1a20 100%);
  --sakura-gradient-glass: linear-gradient(135deg, rgba(30, 30, 42, 0.85) 0%, rgba(30, 30, 42, 0.55) 100%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--sakura-header-h) + 20px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--sakura-font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--sakura-text);
  background: var(--sakura-bg);
  background-image: var(--sakura-gradient-soft);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--sakura-transition-base), color var(--sakura-transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--sakura-primary);
  text-decoration: none;
  transition: color var(--sakura-transition-fast), opacity var(--sakura-transition-fast);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--sakura-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  list-style: none;
}

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

input,
button,
textarea {
  font-family: inherit;
  font-size: inherit;
}

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

::selection {
  background: var(--sakura-primary);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--sakura-border-strong);
  border-radius: var(--sakura-radius-pill);
  border: 2px solid var(--sakura-bg-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--sakura-primary);
}

/* ===== HEADER ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  height: var(--sakura-header-h);
  background: var(--sakura-surface-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--sakura-border);
  transition: background var(--sakura-transition-base), box-shadow var(--sakura-transition-base), border-color var(--sakura-transition-base);
}

#site-header:hover {
  box-shadow: var(--sakura-shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--sakura-text);
  font-weight: 700;
  transition: transform var(--sakura-transition-fast);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--sakura-text);
}

.logo svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 4px 10px rgba(232, 84, 107, 0.3));
  transition: transform var(--sakura-transition-slow);
}

.logo:hover svg {
  transform: rotate(12deg) scale(1.08);
}

.logo-text {
  font-size: 1.15rem;
  letter-spacing: 0.5px;
  background: var(--sakura-gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

#main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

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

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--sakura-text-secondary);
  border-radius: var(--sakura-radius-pill);
  position: relative;
  white-space: nowrap;
  transition: color var(--sakura-transition-fast), background var(--sakura-transition-fast);
}

#main-nav a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--sakura-gradient-primary);
  border-radius: var(--sakura-radius-pill);
  transform: translateX(-50%);
  transition: width var(--sakura-transition-base);
}

#main-nav a:hover {
  color: var(--sakura-primary);
  background: rgba(232, 84, 107, 0.06);
}

#main-nav a:hover::after {
  width: 60%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

#site-search {
  display: flex;
  align-items: center;
  background: var(--sakura-bg-alt);
  border: 1px solid var(--sakura-border);
  border-radius: var(--sakura-radius-pill);
  overflow: hidden;
  transition: border-color var(--sakura-transition-fast), box-shadow var(--sakura-transition-fast), background var(--sakura-transition-fast);
}

#site-search:focus-within {
  border-color: var(--sakura-primary);
  box-shadow: 0 0 0 3px rgba(232, 84, 107, 0.12);
  background: var(--sakura-surface);
}

#search-input {
  width: 150px;
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: var(--sakura-text);
  font-size: 0.85rem;
  outline: none;
  transition: width var(--sakura-transition-base);
}

#search-input::placeholder {
  color: var(--sakura-text-muted);
}

#search-input:focus {
  width: 200px;
}

#site-search button {
  padding: 8px 16px;
  background: var(--sakura-gradient-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--sakura-transition-fast), transform var(--sakura-transition-fast);
}

#site-search button:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

#theme-toggle,
#menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--sakura-bg-alt);
  border: 1px solid var(--sakura-border);
  font-size: 1.1rem;
  color: var(--sakura-text);
  transition: background var(--sakura-transition-fast), transform var(--sakura-transition-fast), border-color var(--sakura-transition-fast), box-shadow var(--sakura-transition-fast);
}

#theme-toggle:hover,
#menu-toggle:hover {
  background: var(--sakura-primary);
  color: #fff;
  border-color: var(--sakura-primary);
  transform: translateY(-2px) rotate(8deg);
  box-shadow: var(--sakura-shadow-glow);
}

#menu-toggle {
  display: none;
}

/* ===== MAIN ===== */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

section {
  margin-bottom: 72px;
  scroll-margin-top: calc(var(--sakura-header-h) + 24px);
}

section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
  color: var(--sakura-text);
  letter-spacing: -0.02em;
}

section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 6px;
  border-radius: var(--sakura-radius-pill);
  background: var(--sakura-gradient-primary);
  box-shadow: 0 0 12px rgba(232, 84, 107, 0.4);
}

section h3 {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--sakura-text);
  line-height: 1.4;
}

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

section ul,
section ol {
  margin: 12px 0 18px;
  padding-left: 0;
}

/* ===== HERO ===== */
#hero {
  position: relative;
  padding: 56px 40px 48px;
  margin-top: 32px;
  border-radius: var(--sakura-radius-xl);
  background: var(--sakura-gradient-primary);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--sakura-shadow-glow);
}

#hero::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -20%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(247, 201, 72, 0.35) 0%, transparent 70%);
  pointer-events: none;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

#hero h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

#hero .lead {
  position: relative;
  z-index: 1;
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.94);
  max-width: 860px;
  margin-bottom: 36px;
}

/* ===== CAROUSEL ===== */
#banner-carousel {
  position: relative;
  z-index: 1;
  border-radius: var(--sakura-radius-lg);
  overflow: hidden;
  background: var(--sakura-surface-glass-strong);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--sakura-shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

#banner-carousel .slide {
  display: none;
  animation: fadeSlideIn 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

#banner-carousel .slide.active,
#banner-carousel .slide[data-index="0"] {
  display: block;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateX(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

#banner-carousel .slide svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--sakura-radius-lg);
}

.carousel-prev,
.carousel-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--sakura-surface-glass-strong);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--sakura-text);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: var(--sakura-shadow-md);
  border: 1px solid var(--sakura-border);
  transition: background var(--sakura-transition-fast), transform var(--sakura-transition-fast), color var(--sakura-transition-fast);
  z-index: 2;
}

.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }

.carousel-prev:hover,
.carousel-next:hover {
  background: var(--sakura-primary);
  color: #fff;
  transform: translateY(-50%) scale(1.12);
}

/* ===== BREADCRUMB ===== */
#breadcrumb {
  margin: 28px 0 40px;
}

#breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

#breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--sakura-text-muted);
}

#breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--sakura-border-strong);
}

#breadcrumb a {
  color: var(--sakura-text-secondary);
  padding: 4px 8px;
  border-radius: var(--sakura-radius-sm);
  transition: color var(--sakura-transition-fast), background var(--sakura-transition-fast);
}

#breadcrumb a:hover {
  color: var(--sakura-primary);
  background: rgba(232, 84, 107, 0.06);
}

#breadcrumb [aria-current="page"] {
  color: var(--sakura-primary);
  font-weight: 600;
}

/* ===== CARDS / SECTIONS ===== */
#brand,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#legal,
#page-meta {
  background: var(--sakura-surface-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--sakura-border);
  border-radius: var(--sakura-radius-xl);
  padding: 40px;
  box-shadow: var(--sakura-shadow-sm);
  transition: box-shadow var(--sakura-transition-base), transform var(--sakura-transition-base), border-color var(--sakura-transition-base);
}

#brand:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#legal:hover,
#page-meta:hover {
  box-shadow: var(--sakura-shadow-md);
  border-color: var(--sakura-border-strong);
}

/* ===== CASES ===== */
#cases blockquote {
  margin: 24px 0 0;
  padding: 24px 28px;
  background: var(--sakura-gradient-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-left: 4px solid var(--sakura-primary);
  border-radius: 0 var(--sakura-radius-md) var(--sakura-radius-md) 0;
  box-shadow: var(--sakura-shadow-sm);
}

#cases blockquote p {
  margin-bottom: 10px;
  font-style: italic;
  color: var(--sakura-text-secondary);
  position: relative;
  padding-left: 20px;
}

#cases blockquote p::before {
  content: "“";
  position: absolute;
  left: 0;
  top: -4px;
  font-size: 1.6rem;
  color: var(--sakura-primary);
  font-style: normal;
  line-height: 1;
}

#cases blockquote p:last-child {
  margin-bottom: 0;
}

/* ===== NEWS ===== */
#news h3 {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(232, 84, 107, 0.08);
  border-radius: var(--sakura-radius-pill);
  font-size: 0.95rem;
  color: var(--sakura-primary);
  margin-top: 24px;
}

#news h3:first-of-type {
  margin-top: 0;
}

/* ===== ARTICLES ===== */
#articles article {
  padding: 24px;
  margin-bottom: 16px;
  background: var(--sakura-surface);
  border: 1px solid var(--sakura-border);
  border-radius: var(--sakura-radius-lg);
  box-shadow: var(--sakura-shadow-sm);
  transition: transform var(--sakura-transition-base), box-shadow var(--sakura-transition-base), border-color var(--sakura-transition-base);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--sakura-shadow-lg);
  border-color: var(--sakura-border-strong);
}

#articles article h3 {
  margin-top: 0;
  font-size: 1.1rem;
  color: var(--sakura-text);
  transition: color var(--sakura-transition-fast);
}

#articles article:hover h3 {
  color: var(--sakura-primary);
}

#articles article p {
  font-size: 0.9rem;
  color: var(--sakura-text-muted);
  margin-bottom: 12px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--sakura-primary);
  padding: 6px 14px;
  border-radius: var(--sakura-radius-pill);
  background: rgba(232, 84, 107, 0.06);
  transition: background var(--sakura-transition-fast), gap var(--sakura-transition-fast), color var(--sakura-transition-fast);
}

#articles article a::after {
  content: "→";
  transition: transform var(--sakura-transition-fast);
}

#articles article a:hover {
  background: var(--sakura-primary);
  color: #fff;
  gap: 10px;
}

#articles article a:hover::after {
  transform: translateX(3px);
}

/* ===== FAQ ===== */
#faq details {
  margin-bottom: 12px;
  background: var(--sakura-surface);
  border: 1px solid var(--sakura-border);
  border-radius: var(--sakura-radius-md);
  overflow: hidden;
  transition: box-shadow var(--sakura-transition-base), border-color var(--sakura-transition-base);
}

#faq details:hover {
  border-color: var(--sakura-border-strong);
  box-shadow: var(--sakura-shadow-sm);
}

#faq details[open] {
  border-color: var(--sakura-primary);
  box-shadow: var(--sakura-shadow-md);
}

#faq summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--sakura-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background var(--sakura-transition-fast), color var(--sakura-transition-fast);
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(232, 84, 107, 0.1);
  color: var(--sakura-primary);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
  transition: transform var(--sakura-transition-base), background var(--sakura-transition-fast), color var(--sakura-transition-fast);
}

#faq details[open] summary {
  background: rgba(232, 84, 107, 0.06);
  color: var(--sakura-primary);
}

#faq details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
  background: var(--sakura-primary);
  color: #fff;
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--sakura-text-secondary);
  animation: fadeSlideIn 0.35s ease;
}

/* ===== HOWTO ===== */
#howto h3 {
  position: relative;
  padding-left: 32px;
}

#howto h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--sakura-gradient-primary);
  box-shadow: 0 0 10px rgba(232, 84, 107, 0.4);
}

#howto p {
  padding-left: 32px;
}

/* ===== CONTACT ===== */
#contact p {
  font-size: 0.95rem;
  padding: 10px 16px;
  margin-bottom: 8px;
  background: var(--sakura-bg-alt);
  border-radius: var(--sakura-radius-md);
  border-left: 3px solid var(--sakura-border-strong);
  transition: border-color var(--sakura-transition-fast), background var(--sakura-transition-fast), transform var(--sakura-transition-fast);
}

#contact p:hover {
  border-left-color: var(--sakura-primary);
  background: rgba(232, 84, 107, 0.05);
  transform: translateX(4px);
}

/* ===== SITEMAP ===== */
#sitemap ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

#sitemap ul li {
  margin: 0;
}

#sitemap ul a {
  display: inline-block;
  padding: 8px 18px;
  background: var(--sakura-surface);
  border: 1px solid var(--sakura-border);
  border-radius: var(--sakura-radius-pill);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--sakura-text-secondary);
  transition: all var(--sakura-transition-fast);
}

#sitemap ul a:hover {
  background: var(--sakura-gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--sakura-shadow-glow);
}

#sitemap h3 {
  margin-top: 32px;
}

/* ===== LEGAL ===== */
#legal h3 {
  color: var(--sakura-primary);
  font-size: 1.05rem;
}

/* ===== PAGE META ===== */
#page-meta {
  background: var(--sakura-gradient-glass);
  text-align: center;
}

#page-meta h2 {
  justify-content: center;
  display: flex;
}

#page-meta p {
  font-size: 0.85rem;
  color: var(--sakura-text-muted);
  margin-bottom: 6px;
}

/* ===== FOOTER ===== */
#site-footer {
  background: var(--sakura-gradient-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 56px 24px 40px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--sakura-gradient-primary);
}

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

.footer-inner p {
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.75);
}

.footer-inner nav {
  margin-top: 24px;
}

.footer-inner nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-inner nav a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: var(--sakura-radius-pill);
  transition: color var(--sakura-transition-fast), background var(--sakura-transition-fast);
}

.footer-inner nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* ===== BACK TO TOP ===== */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--sakura-gradient-primary);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  box-shadow: var(--sakura-shadow-glow);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity var(--sakura-transition-base), transform var(--sakura-transition-base), visibility var(--sakura-transition-base);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 40px rgba(232, 84, 107, 0.4);
}

/* ===== SCROLL ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

section {
  animation: fadeInScale 0.6s ease both;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1080px) {
  #main-nav a {
    padding: 8px 10px;
    font-size: 0.84rem;
  }

  #search-input {
    width: 120px;
  }

  #search-input:focus {
    width: 160px;
  }
}

@media (max-width: 900px) {
  :root {
    --sakura-header-h: 64px;
  }

  .header-inner {
    padding: 0 16px;
    gap: 12px;
  }

  #main-nav {
    position: fixed;
    top: var(--sakura-header-h);
    left: 0;
    right: 0;
    background: var(--sakura-surface-glass-strong);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--sakura-border);
    box-shadow: var(--sakura-shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--sakura-transition-slow), padding var(--sakura-transition-slow);
    z-index: 999;
  }

  #main-nav.open {
    max-height: 480px;
    padding: 16px 0;
    overflow-y: auto;
  }

  #main-nav ul {
    flex-direction: column;
    gap: 2px;
    padding: 0 16px;
  }

  #main-nav a {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--sakura-radius-md);
    text-align: left;
  }

  #main-nav a::after {
    display: none;
  }

  #menu-toggle {
    display: flex;
  }

  #site-search {
    display: none;
  }

  #hero {
    padding: 40px 24px 32px;
    margin-top: 20px;
    border-radius: var(--sakura-radius-lg);
  }

  main {
    padding: 0 16px 60px;
  }

  section {
    margin-bottom: 48px;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #legal,
  #page-meta {
    padding: 28px 22px;
    border-radius: var(--sakura-radius-lg);
  }

  .carousel-prev,
  .carousel-next {
    width: 36px;
    height: 36px;
    font-size: 1.3rem;
  }

  .carousel-prev { left: 10px; }
  .carousel-next { right: 10px; }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  .logo-text {
    font-size: 1rem;
  }

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

  #hero {
    padding: 32px 18px 26px;
  }

  #hero h1 {
    font-size: 1.35rem;
  }

  #hero .lead {
    font-size: 0.9rem;
    margin-bottom: 24px;
  }

  section h2 {
    font-size: 1.3rem;
    padding-left: 16px;
    margin-bottom: 18px;
  }

  section h2::before {
    width: 4px;
  }

  section h3 {
    font-size: 1.05rem;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #faq,
  #howto,
  #contact,
  #sitemap,
  #legal,
  #page-meta {
    padding: 22px 16px;
    border-radius: var(--sakura-radius-md);
  }

  #articles article {
    padding: 18px;
  }

  #faq summary {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  #faq details p {
    padding: 0 16px 16px;
    font-size: 0.86rem;
  }

  #howto h3,
  #howto p {
    padding-left: 26px;
  }

  #howto h3::before {
    width: 14px;
    height: 14px;
  }

  #sitemap ul {
    gap: 8px;
  }

  #sitemap ul a {
    padding: 6px 14px;
    font-size: 0.82rem;
  }

  .footer-inner nav ul {
    gap: 4px 12px;
  }

  #back-to-top {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}

/* ===== 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;
  }

  #hero {
    animation: none;
  }
}

@media (prefers-contrast: high) {
  :root {
    --sakura-border: rgba(0, 0, 0, 0.3);
    --sakura-border-strong: rgba(0, 0, 0, 0.5);
  }

  [data-theme="dark"] {
    --sakura-border: rgba(255, 255, 255, 0.3);
    --sakura-border-strong: rgba(255, 255, 255, 0.5);
  }
}

/* ===== PRINT ===== */
@media print {
  #site-header,
  #back-to-top,
  .carousel-prev,
  .carousel-next,
  #site-footer {
    display: none !important;
  }

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

  section {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}