:root {
  --brand: #f8b400;
  --brand-2: #ff6b6b;
  --brand-3: #7c5cff;
  --bg: #f5f7fb;
  --bg-2: #ffffff;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #64748b;
  --border: rgba(15, 23, 42, 0.1);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 24px 64px rgba(15, 23, 42, 0.16);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --maxw: 1200px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --grad-header: linear-gradient(120deg, rgba(15, 23, 42, 0.92), rgba(30, 41, 59, 0.86) 45%, rgba(124, 92, 255, 0.55));
  --grad-banner: linear-gradient(135deg, #0f172a 0%, #1e1b4b 38%, #4c1d95 68%, #7c5cff 100%);
  --grad-brand: linear-gradient(135deg, #f8b400, #ff6b6b 55%, #7c5cff);
  --grad-card: linear-gradient(160deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.62));
}

html[data-theme="dark"] {
  --bg: #070b16;
  --bg-2: #0b1120;
  --surface: rgba(17, 24, 39, 0.62);
  --surface-solid: #111827;
  --text: #f1f5f9;
  --text-2: #cbd5e1;
  --text-3: #94a3b8;
  --border: rgba(148, 163, 184, 0.18);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 28px 72px rgba(0, 0, 0, 0.6);
  --grad-header: linear-gradient(120deg, rgba(7, 11, 22, 0.94), rgba(15, 23, 42, 0.88) 45%, rgba(124, 92, 255, 0.35));
  --grad-card: linear-gradient(160deg, rgba(30, 41, 59, 0.72), rgba(15, 23, 42, 0.5));
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #070b16;
    --bg-2: #0b1120;
    --surface: rgba(17, 24, 39, 0.62);
    --surface-solid: #111827;
    --text: #f1f5f9;
    --text-2: #cbd5e1;
    --text-3: #94a3b8;
    --border: rgba(148, 163, 184, 0.18);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 28px 72px rgba(0, 0, 0, 0.6);
    --grad-header: linear-gradient(120deg, rgba(7, 11, 22, 0.94), rgba(15, 23, 42, 0.88) 45%, rgba(124, 92, 255, 0.35));
    --grad-card: linear-gradient(160deg, rgba(30, 41, 59, 0.72), rgba(15, 23, 42, 0.5));
  }
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 12% -8%, rgba(124, 92, 255, 0.18), transparent 60%),
    radial-gradient(900px 520px at 92% 4%, rgba(248, 180, 0, 0.16), transparent 62%),
    radial-gradient(1000px 700px at 50% 110%, rgba(255, 107, 107, 0.12), transparent 60%);
  background-attachment: fixed;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(rgba(148, 163, 184, 0.16) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.5;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 70%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 70%);
}

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

a {
  color: var(--brand-3);
  text-decoration: none;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover,
a:focus-visible {
  color: var(--brand-2);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  color: var(--text);
  letter-spacing: 0.01em;
  margin: 0 0 0.6em;
  font-weight: 700;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  position: relative;
  padding-left: 18px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: var(--grad-brand);
  box-shadow: 0 0 18px rgba(248, 180, 0, 0.45);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
}

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

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

li {
  margin-bottom: 0.4em;
}

blockquote {
  margin: 1.4em 0;
  padding: 1.2em 1.4em;
  border-left: 4px solid var(--brand);
  border-radius: var(--radius-sm);
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}

blockquote p {
  margin: 0 0 0.6em;
  color: var(--text);
  font-style: italic;
}

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

header#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--grad-header);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.28);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand svg {
  flex: 0 0 auto;
  filter: drop-shadow(0 6px 16px rgba(248, 180, 0, 0.35));
  transition: transform 0.5s var(--ease);
}

.brand:hover svg {
  transform: rotate(-8deg) scale(1.06);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-size: 1.18rem;
  color: #fff;
  letter-spacing: 0.06em;
  background: linear-gradient(90deg, #fff, #fcd34d);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text span {
  font-size: 0.72rem;
  color: rgba(226, 232, 240, 0.72);
  letter-spacing: 0.16em;
}

header nav {
  flex: 1 1 auto;
  min-width: 0;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

header nav a {
  display: inline-block;
  padding: 7px 12px;
  font-size: 0.9rem;
  color: rgba(226, 232, 240, 0.86);
  border-radius: 999px;
  position: relative;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

header nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: translateX(-50%);
  transition: width 0.3s var(--ease);
}

header nav a:hover,
header nav a:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

header nav a:hover::after,
header nav a:focus-visible::after {
  width: 60%;
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 1 auto;
}

header form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

header form[role="search"] input[type="search"] {
  width: clamp(140px, 20vw, 220px);
  padding: 9px 14px;
  font-size: 0.9rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}

header form[role="search"] input[type="search"]::placeholder {
  color: rgba(226, 232, 240, 0.6);
}

header form[role="search"] input[type="search"]:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.22);
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(248, 180, 0, 0.22);
}

header form[role="search"] button {
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #0f172a;
  background: var(--grad-brand);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 8px 20px rgba(248, 180, 0, 0.32);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), filter 0.25s var(--ease);
}

header form[role="search"] button:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 12px 26px rgba(248, 180, 0, 0.42);
  filter: saturate(1.15);
}

header form[role="search"] button:active {
  transform: translateY(0) scale(0.98);
}

#theme-toggle {
  flex: 0 0 auto;
  padding: 9px 16px;
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.9);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

#theme-toggle:hover {
  background: rgba(248, 180, 0, 0.22);
  border-color: rgba(248, 180, 0, 0.6);
  color: #fff;
  transform: translateY(-2px);
}

main {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 20px 64px;
  display: block;
}

main > section {
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

#banner {
  position: relative;
  padding: clamp(28px, 5vw, 56px);
  border-radius: var(--radius-lg);
  background: var(--grad-banner);
  background-size: 200% 200%;
  color: #f8fafc;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: bannerShift 18s ease-in-out infinite;
}

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

#banner::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(248, 180, 0, 0.45), transparent 68%);
  filter: blur(12px);
  pointer-events: none;
  animation: floatOrb 12s ease-in-out infinite;
}

#banner::after {
  content: "";
  position: absolute;
  bottom: -45%;
  left: -10%;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.5), transparent 68%);
  filter: blur(16px);
  pointer-events: none;
  animation: floatOrb 15s ease-in-out infinite reverse;
}

@keyframes floatOrb {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-24px, 22px, 0) scale(1.08); }
}

#banner > h1,
#banner > p {
  position: relative;
  z-index: 2;
}

#banner h1 {
  color: #fff;
  text-shadow: 0 6px 24px rgba(2, 6, 23, 0.6);
  max-width: 22em;
}

#banner > p {
  color: rgba(226, 232, 240, 0.92);
  max-width: 62ch;
}

.slides {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 28px 0;
}

.slide {
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow: 0 12px 32px rgba(2, 6, 23, 0.28);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.4s var(--ease), border-color 0.4s var(--ease);
}

.slide:hover {
  transform: translateY(-8px) scale(1.015);
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(248, 180, 0, 0.5);
  box-shadow: 0 22px 48px rgba(2, 6, 23, 0.42);
}

.slide svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.slide h2 {
  font-size: 1.15rem;
  color: #fff;
  padding-left: 0;
  margin-bottom: 8px;
}

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

.slide p {
  color: rgba(226, 232, 240, 0.86);
  font-size: 0.92rem;
  margin: 0;
}

.stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.stats > div {
  padding: 18px 14px;
  text-align: center;
  border-radius: var(--radius);
  background: rgba(15, 23, 42, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
}

.stats > div:hover {
  transform: translateY(-6px);
  border-color: rgba(248, 180, 0, 0.6);
  background: rgba(15, 23, 42, 0.6);
}

.stats strong {
  display: block;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  font-weight: 800;
  line-height: 1.1;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stats span {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: rgba(226, 232, 240, 0.78);
}

nav[aria-label="面包屑导航"] {
  margin: 0 0 32px;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 12px 18px;
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
}

nav[aria-label="面包屑导航"] li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  color: var(--text-3);
  opacity: 0.6;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-2);
}

nav[aria-label="面包屑导航"] a:hover {
  color: var(--brand-2);
}

nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

#intro,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links {
  padding: clamp(22px, 3.4vw, 40px);
  border-radius: var(--radius-lg);
  background: var(--grad-card);
  border: 1px solid var(--border);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: var(--shadow);
  transition: box-shadow 0.4s var(--ease), transform 0.4s var(--ease), border-color 0.4s var(--ease);
}

#intro:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#news:hover,
#articles:hover,
#faq:hover,
#howto:hover,
#contact:hover,
#sitemap:hover,
#links:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(124, 92, 255, 0.32);
}

#intro h3,
#products h3,
#solutions h3,
#cases h3,
#howto h3 {
  margin-top: 1.6em;
  color: var(--text);
}

#intro h3:first-of-type,
#products h3:first-of-type,
#solutions h3:first-of-type,
#cases h3:first-of-type,
#howto h3:first-of-type {
  margin-top: 0.4em;
}

#articles article,
#news article {
  padding: 20px 22px;
  margin-bottom: 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
}

#articles article:hover,
#news article:hover {
  transform: translateY(-6px);
  border-color: rgba(248, 180, 0, 0.5);
  background: var(--surface-solid);
  box-shadow: var(--shadow);
}

#articles article h3,
#news article h3 {
  margin-bottom: 8px;
  transition: color 0.3s var(--ease);
}

#articles article:hover h3,
#news article:hover h3 {
  color: var(--brand-2);
}

#articles article p:first-of-type,
#news article p:first-of-type {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: 8px;
}

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

#articles article a,
#news article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--brand-3);
  transition: gap 0.3s var(--ease), color 0.3s var(--ease);
}

#articles article a::after,
#news article a::after {
  content: "→";
  transition: transform 0.3s var(--ease);
}

#articles article a:hover,
#news article a:hover {
  color: var(--brand-2);
}

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

#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 0.35s var(--ease), box-shadow 0.35s var(--ease), transform 0.35s var(--ease);
}

#faq details:hover {
  border-color: rgba(124, 92, 255, 0.4);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

#faq details[open] {
  border-color: rgba(248, 180, 0, 0.55);
  box-shadow: var(--shadow);
}

#faq summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #0f172a;
  background: var(--grad-brand);
  border-radius: 50%;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease);
}

#faq details[open] summary::after {
  transform: translateY(-50%) rotate(135deg);
}

#faq summary:hover {
  background: rgba(124, 92, 255, 0.08);
  color: var(--brand-3);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  animation: fadeSlide 0.4s var(--ease) both;
}

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

#howto ol {
  counter-reset: howto;
  list-style: none;
  padding-left: 0;
}

#howto ol li {
  position: relative;
  counter-increment: howto;
  padding: 14px 18px 14px 60px;
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: #0f172a;
  background: var(--grad-brand);
  border-radius: 50%;
  box-shadow: 0 6px 16px rgba(248, 180, 0, 0.35);
}

#howto ol li:hover {
  transform: translateX(6px);
  border-color: rgba(248, 180, 0, 0.5);
  box-shadow: var(--shadow);
}

#contact h3 {
  margin-top: 1.4em;
}

#contact p {
  margin-bottom: 0.5em;
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  list-style: none;
  padding-left: 0;
}

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

#sitemap a,
#links a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-4px);
  color: var(--brand-2);
  border-color: rgba(248, 180, 0, 0.55);
  background: var(--surface-solid);
}

footer {
  position: relative;
  z-index: 1;
  margin-top: 40px;
  padding: 48px 20px 32px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.92), rgba(7, 11, 22, 0.98));
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  color: rgba(226, 232, 240, 0.82);
}

html[data-theme="dark"] footer {
  background: linear-gradient(180deg, rgba(2, 6, 23, 0.96), rgba(2, 6, 23, 1));
}

footer > section {
  max-width: var(--maxw);
  margin: 0 auto 24px;
}

footer h2 {
  font-size: 1.15rem;
  color: #fff;
  padding-left: 16px;
}

footer h2::before {
  width: 5px;
}

footer p {
  color: rgba(226, 232, 240, 0.78);
  max-width: 70ch;
}

footer > p {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  color: rgba(148, 163, 184, 0.9);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  padding: 12px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #0f172a;
  background: var(--grad-brand);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 14px 34px rgba(248, 180, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.92);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

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

#back-to-top:hover {
  box-shadow: 0 18px 42px rgba(248, 180, 0, 0.55);
  transform: translateY(-4px) scale(1.04);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}

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

@media (max-width: 980px) {
  .header-inner {
    padding: 10px 16px;
    gap: 10px 14px;
  }

  header nav {
    order: 3;
    flex: 1 1 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  header nav::-webkit-scrollbar {
    display: none;
  }

  header nav ul {
    flex-wrap: nowrap;
    padding-bottom: 4px;
  }

  header nav a {
    white-space: nowrap;
  }

  header form[role="search"] {
    margin-left: auto;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 64px;
  }

  body {
    font-size: 15px;
  }

  main {
    padding: 20px 14px 48px;
  }

  main > section {
    margin-bottom: 36px;
  }

  #banner {
    padding: 24px 18px;
    border-radius: var(--radius);
  }

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

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

  header form[role="search"] {
    order: 4;
    flex: 1 1 100%;
    width: 100%;
  }

  header form[role="search"] input[type="search"] {
    flex: 1 1 auto;
    width: auto;
    min-width: 0;
  }

  #theme-toggle {
    order: 2;
  }

  #faq summary {
    padding: 14px 48px 14px 16px;
    font-size: 0.95rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 54px;
  }

  #howto ol li::before {
    left: 12px;
    width: 26px;
    height: 26px;
    font-size: 0.82rem;
  }

  #back-to-top {
    right: 14px;
    bottom: 14px;
    padding: 10px 14px;
    font-size: 0.8rem;
  }
}

@media (max-width: 420px) {
  .brand-text span {
    display: none;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .stats > div {
    padding: 14px 10px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

::selection {
  background: rgba(248, 180, 0, 0.35);
  color: var(--text);
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(248, 180, 0, 0.7), rgba(124, 92, 255, 0.7));
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(248, 180, 0, 0.95), rgba(124, 92, 255, 0.95));
  background-clip: content-box;
}