:root {
  --primary: #6C5CE7;
  --primary-dark: #5A4BD1;
  --primary-light: #A29BFE;
  --accent: #00B894;
  --accent-warm: #E17055;
  --accent-pink: #FD79A8;
  --bg: #F8F9FE;
  --bg-card: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.45);
  --text: #1A1A2E;
  --text-secondary: #555577;
  --text-muted: #8888A8;
  --border: #E4E4F0;
  --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
  --shadow-md: 0 8px 28px rgba(108, 92, 231, 0.12);
  --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --header-h: 72px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --gradient-banner: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 40%, #FD79A8 100%);
  --gradient-btn: linear-gradient(135deg, #6C5CE7, #A29BFE);
  --gradient-accent: linear-gradient(135deg, #00B894, #55EFC4);
  --gradient-warm: linear-gradient(135deg, #E17055, #FAB1A0);
}

[data-theme="dark"] {
  --bg: #0F0F1A;
  --bg-card: #1A1A2E;
  --bg-glass: rgba(26, 26, 46, 0.78);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text: #EAEAF5;
  --text-secondary: #B0B0CC;
  --text-muted: #7777A0;
  --border: #2A2A45;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --gradient-banner: linear-gradient(135deg, #3D2E8C 0%, #5A4BD1 40%, #C44569 100%);
  --gradient-btn: linear-gradient(135deg, #6C5CE7, #8B7CF6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F0F1A;
    --bg-card: #1A1A2E;
    --bg-glass: rgba(26, 26, 46, 0.78);
    --bg-glass-border: rgba(255, 255, 255, 0.08);
    --text: #EAEAF5;
    --text-secondary: #B0B0CC;
    --text-muted: #7777A0;
    --border: #2A2A45;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --gradient-banner: linear-gradient(135deg, #3D2E8C 0%, #5A4BD1 40%, #C44569 100%);
    --gradient-btn: linear-gradient(135deg, #6C5CE7, #8B7CF6);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--primary-dark);
  opacity: 0.85;
}

ul, ol {
  list-style: none;
}

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

input {
  font-family: inherit;
  font-size: inherit;
}

.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(--header-h);
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
  flex-shrink: 0;
  text-decoration: none;
}

.logo:hover {
  color: var(--primary);
  opacity: 1;
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.35);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.5);
}

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

#site-header nav ul {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

#site-header nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
}

#site-header nav a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-btn);
  border-radius: 2px;
  transition: width var(--transition), left var(--transition);
}

#site-header nav a:hover {
  color: var(--primary);
  background: rgba(108, 92, 231, 0.08);
  opacity: 1;
}

#site-header nav a:hover::after {
  width: 50%;
  left: 25%;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.site-search {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.site-search input {
  border: none;
  outline: none;
  background: transparent;
  padding: 8px 14px;
  width: 180px;
  color: var(--text);
  font-size: 0.85rem;
}

.site-search input::placeholder {
  color: var(--text-muted);
}

.site-search button {
  padding: 8px 16px;
  background: var(--gradient-btn);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  transition: opacity var(--transition), transform var(--transition);
  white-space: nowrap;
}

.site-search button:hover {
  opacity: 0.9;
  transform: scale(1.03);
}

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

#theme-toggle:hover,
#menu-toggle:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: rotate(15deg) scale(1.08);
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.35);
}

#menu-toggle {
  display: none;
}

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

main > section,
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "›";
  color: var(--text-muted);
  font-size: 1rem;
}

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

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

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

/* ===== BANNER ===== */
#banner {
  position: relative;
  margin-top: 20px;
  padding: 56px 40px 48px;
  border-radius: var(--radius-xl);
  background: var(--gradient-banner);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

#banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatBlob 12s ease-in-out infinite;
}

#banner::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(253, 121, 168, 0.28) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatBlob 15s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.08); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

#banner h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

#banner .lead {
  position: relative;
  z-index: 1;
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  color: rgba(255, 255, 255, 0.92);
  max-width: 820px;
  line-height: 1.85;
  margin-bottom: 36px;
}

.banner-slides {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.slide {
  background: var(--bg-glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  opacity: 0.75;
  cursor: pointer;
}

.slide.active {
  opacity: 1;
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

.slide:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.25);
  opacity: 1;
}

.slide svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.slide h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.slide p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.banner-nav {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.banner-nav button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.banner-nav button[aria-selected="true"] {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transform: scale(1.1);
}

.banner-nav button:hover {
  background: rgba(255, 255, 255, 0.4);
  transform: scale(1.1);
}

/* ===== STATS ===== */
#stats {
  margin-top: 48px;
}

#stats h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 24px;
  color: var(--text);
  position: relative;
  padding-left: 16px;
}

#stats h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: var(--gradient-btn);
  border-radius: 4px;
}

#stats ul {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

#stats li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#stats li::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-btn);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

#stats li:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

#stats li:hover::before {
  transform: scaleX(1);
}

#stats strong {
  display: block;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  background: var(--gradient-btn);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 6px;
}

#stats span {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== GENERIC SECTIONS ===== */
main > section:not(#banner):not(#stats) {
  margin-top: 64px;
}

main > section h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 20px;
  position: relative;
  padding-left: 18px;
  line-height: 1.4;
}

main > section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 28px;
  background: var(--gradient-btn);
  border-radius: 4px;
}

main > section h3 {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  font-weight: 700;
  color: var(--text);
  margin-top: 32px;
  margin-bottom: 12px;
  line-height: 1.5;
}

main > section p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 14px;
}

main > section > ul {
  margin: 16px 0;
  display: grid;
  gap: 10px;
}

main > section > ul > li {
  position: relative;
  padding-left: 26px;
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

main > section > ul > li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.75em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-btn);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

/* ===== INTRO ===== */
#intro {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

#intro:hover {
  box-shadow: var(--shadow-md);
}

/* ===== PRODUCTS ===== */
#products {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

#products:hover {
  box-shadow: var(--shadow-md);
}

#products > ul {
  grid-template-columns: repeat(2, 1fr);
}

#products > ul > li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px 16px 34px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#products > ul > li:hover {
  transform: translateX(4px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

/* ===== SERVICES ===== */
#services {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

#services:hover {
  box-shadow: var(--shadow-md);
}

#services > ul {
  grid-template-columns: repeat(2, 1fr);
}

#services > ul > li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px 16px 34px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#services > ul > li:hover {
  transform: translateX(4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

/* ===== CASES ===== */
#cases {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#cases blockquote {
  position: relative;
  margin: 18px 0;
  padding: 20px 24px 20px 52px;
  background: var(--bg);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 16px;
  top: 8px;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary-light);
  font-family: Georgia, serif;
  opacity: 0.6;
}

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

#cases blockquote p {
  margin-bottom: 0;
  font-style: italic;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ===== NEWS ===== */
#news {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#news > ul {
  gap: 16px;
}

#news > ul > li {
  padding: 20px 22px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding-left: 22px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#news > ul > li::before {
  display: none;
}

#news > ul > li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

#news h3 {
  margin-top: 0;
  font-size: 1.05rem;
  color: var(--primary);
}

#news p {
  font-size: 0.88rem;
  margin-bottom: 6px;
}

#news p:first-of-type {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== ARTICLES ===== */
#articles {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#articles article {
  padding: 22px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-btn);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s ease;
}

#articles article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

#articles article:hover::before {
  transform: scaleY(1);
}

#articles h3 {
  margin-top: 0;
  font-size: 1.08rem;
  color: var(--text);
  transition: color var(--transition);
}

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

#articles article p:first-of-type {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}

#articles article p {
  font-size: 0.9rem;
  margin-bottom: 12px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 50px;
  background: rgba(108, 92, 231, 0.08);
  transition: all var(--transition);
}

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

#articles article a:hover {
  background: var(--gradient-btn);
  color: #fff;
  opacity: 1;
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.35);
}

#articles article a:hover::after {
  transform: translateX(4px);
}

/* ===== HOWTO ===== */
#howto {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#howto ol {
  counter-reset: howto-step;
  display: grid;
  gap: 12px;
  margin: 16px 0;
}

#howto ol li {
  counter-increment: howto-step;
  position: relative;
  padding: 16px 20px 16px 64px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

#howto > ul {
  grid-template-columns: repeat(2, 1fr);
}

#howto > ul > li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 18px 14px 34px;
  transition: transform var(--transition), border-color var(--transition);
}

#howto > ul > li:hover {
  transform: translateX(4px);
  border-color: var(--accent);
}

/* ===== FAQ ===== */
#faq {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#faq details {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

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

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

#faq summary {
  padding: 18px 24px 18px 52px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  cursor: pointer;
  position: relative;
  list-style: none;
  transition: color var(--transition), background var(--transition);
  user-select: none;
}

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

#faq summary::before {
  content: "+";
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: transform 0.35s ease, background 0.35s ease;
  box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}

#faq details[open] summary::before {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--gradient-accent);
}

#faq summary:hover {
  color: var(--primary);
  background: rgba(108, 92, 231, 0.04);
}

#faq details[open] summary {
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}

#faq details p {
  padding: 18px 24px;
  margin-bottom: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.9;
  animation: fadeSlideIn 0.35s ease;
}

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

/* ===== CONTACT ===== */
#contact {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#contact address {
  font-style: normal;
}

#contact address ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 20px 0;
}

#contact address li {
  padding: 16px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  padding-left: 44px;
}

#contact address li::before {
  content: "◆";
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 0.7rem;
}

#contact address li:hover {
  transform: translateY(-3px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

/* ===== SITEMAP ===== */
#sitemap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#sitemap ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

#sitemap li {
  padding: 0;
}

#sitemap li::before {
  display: none;
}

#sitemap a {
  display: inline-block;
  padding: 8px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

#sitemap a:hover {
  background: var(--gradient-btn);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(108, 92, 231, 0.35);
  opacity: 1;
}

/* ===== LINKS ===== */
#links {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
}

#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

#links li {
  padding: 0;
}

#links li::before {
  display: none;
}

#links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

#links a::before {
  content: "🔗";
  font-size: 0.8rem;
}

#links a:hover {
  background: var(--gradient-accent);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(0, 184, 148, 0.35);
  opacity: 1;
}

/* ===== LEGAL ===== */
#legal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 64px;
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition);
}

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.7;
}

footer p:first-child {
  font-weight: 600;
  color: var(--text-secondary);
}

footer a {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(108, 92, 231, 0.08);
  transition: all var(--transition);
}

footer a:hover {
  background: var(--gradient-btn);
  color: #fff;
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(108, 92, 231, 0.35);
}

/* ===== BACK TO TOP ===== */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-btn);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 32px rgba(108, 92, 231, 0.55);
}

/* ===== SCROLL ANIMATIONS ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  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);
}

.reveal.revealed {
  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; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== SELECTION ===== */
::selection {
  background: rgba(108, 92, 231, 0.25);
  color: var(--text);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 10px;
  border: 2px solid var(--bg);
}

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

/* ===== FOCUS ===== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  #site-header nav ul {
    gap: 2px;
  }

  #site-header nav a {
    padding: 8px 10px;
    font-size: 0.84rem;
  }

  .site-search input {
    width: 140px;
  }

  #banner {
    padding: 44px 32px 40px;
  }

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

  .banner-slides .slide:last-child {
    grid-column: span 2;
  }

  #stats ul {
    grid-template-columns: repeat(2, 1fr);
  }

  #products > ul,
  #services > ul,
  #howto > ul {
    grid-template-columns: 1fr;
  }
}

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

  #menu-toggle {
    display: flex;
  }

  #site-header nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--bg-glass-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: var(--shadow-md);
    justify-content: flex-start;
  }

  #site-header.nav-open nav {
    max-height: 480px;
    overflow-y: auto;
  }

  #site-header nav ul {
    flex-direction: column;
    width: 100%;
    padding: 12px 20px 20px;
    gap: 2px;
  }

  #site-header nav a {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    width: 100%;
  }

  #site-header nav a::after {
    display: none;
  }

  #site-header nav a:hover {
    background: rgba(108, 92, 231, 0.1);
  }

  .site-search {
    display: none;
  }

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

  .logo span {
    font-size: 1.1rem;
  }

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

  main > section,
  .breadcrumb {
    padding-left: 16px;
    padding-right: 16px;
  }

  #banner {
    padding: 36px 22px 32px;
    border-radius: var(--radius-lg);
  }

  .banner-slides {
    grid-template-columns: 1fr;
  }

  .banner-slides .slide:last-child {
    grid-column: span 1;
  }

  .slide.active {
    transform: none;
  }

  #intro,
  #products,
  #services,
  #cases,
  #news,
  #articles,
  #howto,
  #faq,
  #contact,
  #sitemap,
  #links,
  #legal {
    padding: 28px 22px;
    border-radius: var(--radius-lg);
  }

  main > section:not(#banner):not(#stats) {
    margin-top: 40px;
  }

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

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

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

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

  #banner .lead {
    font-size: 0.88rem;
  }

  #stats ul {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  #stats li {
    padding: 20px 12px;
  }

  #stats strong {
    font-size: 1.6rem;
  }

  #stats span {
    font-size: 0.75rem;
  }

  main > section h2 {
    font-size: 1.2rem;
    padding-left: 14px;
  }

  main > section h2::before {
    width: 4px;
    height: 22px;
  }

  #faq summary {
    padding: 16px 18px 16px 46px;
    font-size: 0.9rem;
  }

  #faq summary::before {
    left: 14px;
    width: 22px;
    height: 22px;
  }

  #howto ol li {
    padding: 14px 16px 14px 56px;
  }

  #howto ol li::before {
    left: 14px;
    width: 28px;
    height: 28px;
    font-size: 0.78rem;
  }

  #articles article {
    padding: 18px 18px;
  }

  footer {
    padding: 28px 16px;
  }
}

/* ===== REDUCED MOTION ===== */
@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;
  }
}

/* ===== PRINT ===== */
@media print {
  #site-header,
  #back-to-top,
  .banner-nav,
  .header-tools {
    display: none;
  }

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

  main {
    padding-top: 0;
  }

  #banner {
    background: #6C5CE7 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}