:root {
  --brand: #6C4CF1;
  --brand-2: #8B5CF6;
  --brand-3: #A78BFA;
  --accent: #FFB020;
  --accent-2: #FF7A59;
  --bg: #F4F2FF;
  --bg-2: #FFFFFF;
  --bg-3: #EDE9FF;
  --text: #1A1533;
  --text-2: #4A4468;
  --text-3: #7A749A;
  --border: rgba(108, 76, 241, 0.14);
  --card: rgba(255, 255, 255, 0.72);
  --card-solid: #FFFFFF;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.75);
  --shadow-sm: 0 2px 8px rgba(26, 21, 51, 0.06);
  --shadow: 0 8px 28px rgba(26, 21, 51, 0.09);
  --shadow-lg: 0 20px 50px rgba(26, 21, 51, 0.14);
  --shadow-brand: 0 12px 32px rgba(108, 76, 241, 0.28);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 26px;
  --radius-xl: 34px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --maxw: 1180px;
  --header-h: 72px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #0E0B1A;
  --bg-2: #16122A;
  --bg-3: #1D1838;
  --text: #F2F0FF;
  --text-2: #C4BEE4;
  --text-3: #8E87B5;
  --border: rgba(167, 139, 250, 0.18);
  --card: rgba(30, 24, 58, 0.62);
  --card-solid: #1B1636;
  --glass: rgba(30, 24, 58, 0.5);
  --glass-border: rgba(167, 139, 250, 0.22);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.42);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
  --shadow-brand: 0 12px 32px rgba(108, 76, 241, 0.42);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0E0B1A;
    --bg-2: #16122A;
    --bg-3: #1D1838;
    --text: #F2F0FF;
    --text-2: #C4BEE4;
    --text-3: #8E87B5;
    --border: rgba(167, 139, 250, 0.18);
    --card: rgba(30, 24, 58, 0.62);
    --card-solid: #1B1636;
    --glass: rgba(30, 24, 58, 0.5);
    --glass-border: rgba(167, 139, 250, 0.22);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.42);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
    --shadow-brand: 0 12px 32px rgba(108, 76, 241, 0.42);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1100px 620px at 88% -10%, rgba(108, 76, 241, 0.16), transparent 62%),
    radial-gradient(900px 520px at -8% 4%, rgba(255, 176, 32, 0.13), transparent 58%),
    radial-gradient(760px 700px at 50% 118%, rgba(139, 92, 246, 0.14), transparent 62%);
  background-attachment: fixed;
  transition: background-color 0.45s var(--ease), color 0.45s var(--ease);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover {
  color: var(--accent-2);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(108, 76, 241, 0.5);
  outline-offset: 2px;
  border-radius: 6px;
}

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

h1 {
  font-size: clamp(1.6rem, 4.4vw, 2.6rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  position: relative;
}

h3 {
  font-size: clamp(1.08rem, 2.2vw, 1.3rem);
}

p {
  margin: 0 0 1em;
  color: var(--text-2);
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
  color: var(--text-2);
}

li {
  margin-bottom: 0.5em;
}

li::marker {
  color: var(--brand);
  font-weight: 700;
}

strong {
  color: var(--text);
  font-weight: 800;
}

address {
  font-style: normal;
}

blockquote {
  margin: 0 0 1em;
  padding: 1em 1.3em;
  border-left: 4px solid var(--brand);
  background: var(--bg-3);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-2);
}

blockquote p {
  margin: 0;
}

.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: rgba(108, 76, 241, 0.28);
  color: var(--text);
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}

::-webkit-scrollbar-track {
  background: var(--bg-3);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand), var(--brand-2));
  border-radius: 20px;
  border: 2px solid var(--bg-3);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--brand-2), var(--accent-2));
}

/* ============ HEADER ============ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 24px rgba(26, 21, 51, 0.06);
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

[data-theme="dark"] #site-header {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.18rem;
  color: var(--text);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  transition: transform 0.35s var(--ease-spring);
}

.brand:hover {
  transform: translateY(-2px) scale(1.02);
  color: var(--text);
}

.brand svg {
  border-radius: 11px;
  box-shadow: var(--shadow-brand);
  transition: transform 0.5s var(--ease-spring), box-shadow 0.4s var(--ease);
}

.brand:hover svg {
  transform: rotate(-6deg) scale(1.06);
}

.brand-name {
  background: linear-gradient(120deg, var(--brand) 10%, var(--brand-2) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.main-nav {
  flex: 1 1 auto;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav li {
  margin: 0;
}

.main-nav a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-2);
  border-radius: 999px;
  position: relative;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent-2));
  transform: translateX(-50%);
  transition: width 0.32s var(--ease);
}

.main-nav a:hover {
  color: var(--brand);
  background: rgba(108, 76, 241, 0.09);
  transform: translateY(-1px);
}

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

.site-search {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 0 1 250px;
  min-width: 180px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 3px 3px 14px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.site-search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(108, 76, 241, 0.16);
  transform: translateY(-1px);
}

.site-search input[type="search"] {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  padding: 8px 4px;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--text);
}

.site-search input[type="search"]::placeholder {
  color: var(--text-3);
}

.site-search input[type="search"]:focus {
  outline: none;
}

.site-search button[type="submit"] {
  flex-shrink: 0;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 4px 14px rgba(108, 76, 241, 0.32);
  transition: transform 0.25s var(--ease-spring), box-shadow 0.3s var(--ease), filter 0.25s var(--ease);
}

.site-search button[type="submit"]:hover {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 8px 22px rgba(108, 76, 241, 0.45);
  filter: brightness(1.06);
}

.site-search button[type="submit"]:active {
  transform: scale(0.97);
}

.theme-toggle,
.menu-toggle {
  flex-shrink: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-2);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 16px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: color 0.25s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.25s var(--ease-spring), box-shadow 0.3s var(--ease);
}

.theme-toggle:hover,
.menu-toggle:hover {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
}

.theme-toggle:active,
.menu-toggle:active {
  transform: scale(0.96);
}

.menu-toggle {
  display: none;
}

/* ============ MAIN LAYOUT ============ */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 60px;
  display: block;
}

main > section {
  margin-top: 46px;
  padding: 34px clamp(18px, 3.4vw, 44px);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  box-shadow: var(--shadow);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), border-color 0.5s var(--ease), background 0.5s var(--ease);
  opacity: 0;
  transform: translateY(34px);
  animation: revealUp 0.85s var(--ease) forwards;
  animation-timeline: view();
  animation-range: entry 0% entry 42%;
}

@supports not (animation-timeline: view()) {
  main > section {
    opacity: 1;
    transform: none;
    animation: none;
  }
}

main > section:hover {
  border-color: rgba(108, 76, 241, 0.3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

main > section > h2 {
  display: inline-block;
  padding-bottom: 10px;
  margin-bottom: 22px;
}

main > section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 62px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2), var(--accent));
  box-shadow: 0 2px 10px rgba(108, 76, 241, 0.4);
}

main > section > article {
  padding: 20px 22px;
  margin-bottom: 16px;
  border-radius: var(--radius);
  background: var(--bg-2);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease), background 0.4s var(--ease);
}

main > section > article:last-child {
  margin-bottom: 0;
}

main > section > article:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 76, 241, 0.32);
  box-shadow: var(--shadow);
}

main > section > article > h3 {
  color: var(--brand);
  position: relative;
  padding-left: 16px;
}

main > section > article > h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 5px;
  height: 1em;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
}

@keyframes revealUp {
  from {
    opacity: 0;
    transform: translateY(34px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ BREADCRUMB ============ */
.breadcrumb {
  margin: 22px 0 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 10px 18px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-size: 0.84rem;
  box-shadow: var(--shadow-sm);
}

.breadcrumb li {
  margin: 0;
  color: var(--text-3);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--text-3);
  opacity: 0.6;
}

.breadcrumb a {
  font-weight: 600;
  color: var(--text-2);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--brand);
  font-weight: 700;
}

/* ============ HERO ============ */
.hero {
  position: relative;
  margin-top: 26px !important;
  padding: 0 !important;
  overflow: hidden;
  border-radius: var(--radius-xl) !important;
  background: linear-gradient(135deg, #6C4CF1 0%, #8B5CF6 42%, #FF7A59 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.28) !important;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.12) inset !important;
  opacity: 1 !important;
  transform: none !important;
  animation: none !important;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(620px 340px at 88% 8%, rgba(255, 255, 255, 0.28), transparent 62%),
    radial-gradient(520px 320px at 6% 96%, rgba(255, 176, 32, 0.34), transparent 60%),
    radial-gradient(400px 260px at 62% 100%, rgba(255, 255, 255, 0.14), transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  top: -60%;
  left: -20%;
  width: 60%;
  height: 220%;
  background: linear-gradient(100deg, transparent 0%, rgba(255, 255, 255, 0.16) 45%, transparent 100%);
  transform: rotate(8deg);
  animation: heroShine 9s ease-in-out infinite;
  pointer-events: none;
}

@keyframes heroShine {
  0%, 100% { transform: translateX(-30%) rotate(8deg); opacity: 0.25; }
  50% { transform: translateX(190%) rotate(8deg); opacity: 0.6; }
}

.hero:hover {
  transform: none !important;
  border-color: rgba(255, 255, 255, 0.4) !important;
}

.hero-slider {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  padding: clamp(26px, 4.4vw, 56px);
  gap: 18px;
}

.slide {
  display: none;
  animation: slideFade 0.7s var(--ease);
}

.slide[data-slide="1"] {
  display: block;
}

@keyframes slideFade {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.slide h1,
.slide h2 {
  color: #fff;
  text-shadow: 0 3px 20px rgba(30, 16, 80, 0.28);
  margin-bottom: 0.5em;
}

.slide h1 {
  font-size: clamp(1.55rem, 4.6vw, 2.85rem);
  line-height: 1.24;
  letter-spacing: -0.025em;
}

.slide h2 {
  font-size: clamp(1.3rem, 3.4vw, 2.1rem);
}

.slide h2::after {
  display: none;
}

.slide p {
  color: rgba(255, 255, 255, 0.93);
  font-size: clamp(0.94rem, 1.6vw, 1.06rem);
  max-width: 74ch;
  text-shadow: 0 1px 12px rgba(30, 16, 80, 0.22);
}

.slide .cta,
.slide .cta-secondary {
  display: inline-block;
  margin: 8px 10px 0 0;
  padding: 12px 28px;
  font-weight: 800;
  font-size: 0.94rem;
  border-radius: 999px;
  letter-spacing: 0.01em;
  transition: transform 0.3s var(--ease-spring), box-shadow 0.35s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}

.slide .cta {
  color: var(--brand);
  background: #fff;
  box-shadow: 0 10px 28px rgba(20, 10, 60, 0.28);
}

.slide .cta:hover {
  color: var(--brand);
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 16px 38px rgba(20, 10, 60, 0.4);
  background: #FFFDF7;
}

.slide .cta-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.slide .cta-secondary:hover {
  color: var(--brand);
  background: #fff;
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 14px 34px rgba(20, 10, 60, 0.34);
}

.slider-dots {
  position: relative;
  z-index: 3;
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0 clamp(26px, 4.4vw, 56px) clamp(24px, 3.4vw, 40px);
}

.slider-dots li {
  margin: 0;
}

.slider-dots button {
  width: 34px;
  height: 8px;
  padding: 0;
  border: 0;
  cursor: pointer;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.42);
  transition: width 0.35s var(--ease), background 0.3s var(--ease), transform 0.3s var(--ease-spring);
}

.slider-dots button:hover {
  background: rgba(255, 255, 255, 0.78);
  transform: scaleY(1.25);
}

.slider-dots li:first-child button {
  width: 52px;
  background: #fff;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.7);
}

/* ============ STATS ============ */
.stats {
  background: linear-gradient(150deg, rgba(108, 76, 241, 0.1), rgba(255, 176, 32, 0.08)) !important;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 18px;
}

.stat-item {
  position: relative;
  text-align: center;
  padding: 26px 16px;
  border-radius: var(--radius);
  background: var(--card-solid);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.42s var(--ease), box-shadow 0.42s var(--ease), border-color 0.42s var(--ease);
}

.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}

.stat-item:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 76, 241, 0.34);
  box-shadow: var(--shadow);
}

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-item strong {
  display: block;
  font-size: clamp(1.9rem, 4.6vw, 2.7rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  background: linear-gradient(120deg, var(--brand) 8%, var(--brand-2) 52%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.stat-item span {
  display: block;
  margin-top: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-3);
}

/* ============ LISTS & GRIDS ============ */
#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  list-style: none;
  padding: 0;
}

#sitemap li,
#links li {
  margin: 0;
}

#sitemap a,
#links a {
  display: block;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  transition: color 0.3s var(--ease), background 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

#sitemap a::before,
#links a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s var(--ease);
}

#sitemap a:hover,
#links a:hover {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  transform: translateX(4px);
  box-shadow: var(--shadow-brand);
}

#sitemap a:hover::before,
#links a:hover::before {
  transform: scaleY(1);
}

#products ul,
#knowledge ul,
#howto ul,
#howto ol {
  padding-left: 0;
  list-style: none;
}

#products ul li,
#knowledge ul li,
#howto ul li,
#howto ol li {
  position: relative;
  padding: 10px 16px 10px 42px;
  margin-bottom: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-3);
  border: 1px solid transparent;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#products ul li::before,
#knowledge ul li::before,
#howto ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 0 0 4px rgba(108, 76, 241, 0.14);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease);
}

#howto ol {
  counter-reset: howto;
}

#howto ol li {
  counter-increment: howto;
  padding-left: 52px;
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 900;
  color: #fff;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 4px 12px rgba(108, 76, 241, 0.34);
}

#products ul li:hover,
#knowledge ul li:hover,
#howto ul li:hover,
#howto ol li:hover {
  background: rgba(108, 76, 241, 0.1);
  border-color: rgba(108, 76, 241, 0.24);
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
}

#products ul li:hover::before,
#knowledge ul li:hover::before,
#howto ul li:hover::before {
  transform: translateY(-50%) scale(1.28);
  box-shadow: 0 0 0 6px rgba(108, 76, 241, 0.2);
}

/* ============ ARTICLES ============ */
#articles {
  display: block;
}

#articles > article {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#articles > article > p:first-of-type {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand);
  background: rgba(108, 76, 241, 0.1);
  border: 1px solid rgba(108, 76, 241, 0.2);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 6px;
}

#articles > article > p:last-child {
  margin-bottom: 0;
}

#articles > article > p:last-child a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 800;
  font-size: 0.9rem;
  padding: 9px 20px;
  margin-top: 6px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 6px 18px rgba(108, 76, 241, 0.3);
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease), filter 0.3s var(--ease);
}

#articles > article > p:last-child a::after {
  content: "→";
  transition: transform 0.3s var(--ease);
}

#articles > article > p:last-child a:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(108, 76, 241, 0.48);
  filter: brightness(1.08);
}

#articles > article > p:last-child a:hover::after {
  transform: translateX(4px);
}

#article-details > article {
  border-left: 4px solid transparent;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
}

#article-details > article:hover {
  border-left-color: var(--brand);
}

/* ============ NEWS ============ */
#news > article {
  position: relative;
  padding-left: 26px;
}

#news > article::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 26px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 5px rgba(108, 76, 241, 0.16);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease);
}

#news > article::after {
  content: "";
  position: absolute;
  left: 12px;
  top: 40px;
  bottom: -16px;
  width: 2px;
  background: linear-gradient(180deg, rgba(108, 76, 241, 0.3), transparent);
}

#news > article:last-child::after {
  display: none;
}

#news > article:hover::before {
  transform: scale(1.35);
  box-shadow: 0 0 0 8px rgba(108, 76, 241, 0.24);
}

#news > article > p:first-of-type {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 4px;
}

/* ============ FAQ ============ */
#faq > article {
  position: relative;
  padding: 22px 24px 22px 58px;
}

#faq > article::before {
  content: "Q";
  position: absolute;
  left: 18px;
  top: 20px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-size: 0.86rem;
  font-weight: 900;
  color: #fff;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 5px 14px rgba(108, 76, 241, 0.34);
  transition: transform 0.4s var(--ease-spring), box-shadow 0.4s var(--ease);
}

#faq > article:hover::before {
  transform: rotate(-8deg) scale(1.1);
  box-shadow: 0 8px 20px rgba(108, 76, 241, 0.5);
}

#faq > article > h3 {
  color: var(--text);
  padding-left: 0;
}

#faq > article > h3::before {
  display: none;
}

#faq > article > p {
  margin-bottom: 0;
}

/* ============ HOWTO ============ */
#howto > article {
  background: linear-gradient(160deg, var(--bg-2), var(--bg-3));
}

#howto > article:last-child {
  background: linear-gradient(135deg, rgba(108, 76, 241, 0.14), rgba(255, 176, 32, 0.12));
  border-color: rgba(108, 76, 241, 0.28);
}

/* ============ CONTACT ============ */
#contact address {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

#contact address p {
  position: relative;
  margin: 0;
  padding: 16px 18px 16px 46px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

#contact address p::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 14px;
  height: 14px;
  transform: translateY(-50%) rotate(45deg);
  border-radius: 4px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  opacity: 0.85;
}

#contact address p:hover {
  transform: translateY(-3px);
  border-color: rgba(108, 76, 241, 0.3);
  box-shadow: var(--shadow);
}

/* ============ LEGAL & META ============ */
#legal > article {
  border-left: 4px solid transparent;
}

#legal > article:hover {
  border-left-color: var(--accent);
}

#page-meta p {
  display: inline-block;
  margin: 0 8px 8px 0;
  padding: 7px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), transform 0.3s var(--ease);
}

#page-meta p:hover {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  transform: translateY(-2px);
}

/* ============ FOOTER ============ */
#site-footer {
  position: relative;
  margin-top: 40px;
  padding: 44px 20px 34px;
  text-align: center;
  background: linear-gradient(150deg, rgba(108, 76, 241, 0.14), rgba(255, 122, 89, 0.1));
  border-top: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(560px, 80%);
  height: 3px;
  border-radius: 0 0 6px 6px;
  background: linear-gradient(90deg, transparent, var(--brand), var(--accent), transparent);
}

#site-footer p {
  margin: 0 0 10px;
  font-size: 0.86rem;
  color: var(--text-3);
}

#site-footer p:last-child {
  margin-bottom: 0;
}

#site-footer a {
  font-weight: 700;
  color: var(--text-2);
  padding: 3px 6px;
  border-radius: 6px;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

#site-footer a:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

/* ============ BACK TO TOP ============ */
#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 900;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  color: #fff;
  padding: 13px 20px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: var(--shadow-brand);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease), filter 0.3s var(--ease), opacity 0.35s var(--ease);
}

#back-to-top:hover {
  transform: translateY(-5px) scale(1.06);
  box-shadow: 0 18px 40px rgba(108, 76, 241, 0.5);
  filter: brightness(1.1);
}

#back-to-top:active {
  transform: scale(0.94);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1080px) {
  .header-inner {
    gap: 12px 16px;
  }

  .main-nav a {
    padding: 7px 9px;
    font-size: 0.86rem;
  }

  .site-search {
    flex: 1 1 100%;
    order: 5;
    max-width: 100%;
  }
}

@media (max-width: 860px) {
  :root {
    --header-h: 64px;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  .main-nav {
    order: 6;
    flex: 1 1 100%;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.45s var(--ease), opacity 0.35s var(--ease), margin 0.35s var(--ease);
  }

  #site-header.nav-open .main-nav {
    max-height: 520px;
    opacity: 1;
    margin-bottom: 14px;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 10px;
    background: var(--card-solid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .main-nav a {
    display: block;
    padding: 12px 16px;
    font-size: 0.94rem;
    border-radius: var(--radius-sm);
  }

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

  main > section {
    margin-top: 32px;
    padding: 26px 20px;
    border-radius: var(--radius);
  }

  .hero {
    border-radius: var(--radius-lg) !important;
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-item {
    padding: 20px 12px;
  }

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

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

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.72;
  }

  .header-inner {
    padding: 0 14px;
    gap: 10px;
  }

  .brand {
    font-size: 1.05rem;
  }

  .brand svg {
    width: 32px;
    height: 32px;
  }

  .theme-toggle,
  .menu-toggle {
    padding: 8px 13px;
    font-size: 0.78rem;
  }

  main {
    padding: 0 14px 44px;
  }

  main > section {
    margin-top: 26px;
    padding: 22px 16px;
  }

  main > section > article {
    padding: 16px 15px;
  }

  .hero-slider {
    padding: 24px 18px 8px;
  }

  .slider-dots {
    padding: 0 18px 22px;
  }

  .slide .cta,
  .slide .cta-secondary {
    display: block;
    text-align: center;
    margin: 10px 0 0;
    padding: 13px 22px;
  }

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

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }

  #faq > article {
    padding: 18px 16px 18px 52px;
  }

  #faq > article::before {
    left: 14px;
    width: 26px;
    height: 26px;
  }

  #news > article {
    padding-left: 22px;
  }

  #back-to-top {
    right: 14px;
    bottom: 16px;
    padding: 11px 16px;
    font-size: 0.76rem;
  }
}

@media (max-width: 400px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .breadcrumb ol {
    font-size: 0.78rem;
    padding: 8px 14px;
  }
}

/* ============ MOTION & PRINT ============ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  main > section {
    opacity: 1 !important;
    transform: none !important;
  }
}

@media print {
  #site-header,
  #back-to-top,
  .slider-dots,
  .site-search,
  .theme-toggle,
  .menu-toggle {
    display: none !important;
  }

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

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