:root {
  --color-bg: #f6f7fb;
  --color-bg-alt: #ffffff;
  --color-surface: rgba(255, 255, 255, 0.72);
  --color-surface-solid: #ffffff;
  --color-text: #1c2333;
  --color-text-soft: #4a5468;
  --color-text-muted: #6b7488;
  --color-primary: #1a2b4c;
  --color-primary-soft: #2c4270;
  --color-accent: #f5b642;
  --color-accent-deep: #e09a1f;
  --color-border: rgba(26, 43, 76, 0.12);
  --color-border-strong: rgba(26, 43, 76, 0.22);
  --gradient-banner: linear-gradient(135deg, #1a2b4c 0%, #2c4270 42%, #4a3b7a 72%, #8a5a3c 100%);
  --gradient-accent: linear-gradient(135deg, #f5b642 0%, #e09a1f 100%);
  --gradient-soft: linear-gradient(160deg, rgba(245, 182, 66, 0.14), rgba(74, 59, 122, 0.1));
  --shadow-sm: 0 2px 8px rgba(26, 43, 76, 0.06);
  --shadow-md: 0 10px 30px rgba(26, 43, 76, 0.1);
  --shadow-lg: 0 24px 60px rgba(26, 43, 76, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --blur: saturate(160%) blur(16px);
  --header-h: 72px;
  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

html[data-theme="dark"],
html.dark-mode {
  --color-bg: #0d1220;
  --color-bg-alt: #131a2b;
  --color-surface: rgba(24, 33, 54, 0.66);
  --color-surface-solid: #182136;
  --color-text: #eef1f8;
  --color-text-soft: #c2cadd;
  --color-text-muted: #8e99b2;
  --color-primary: #6f8fd6;
  --color-primary-soft: #8aa6e0;
  --color-accent: #f5b642;
  --color-accent-deep: #ffca66;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-strong: rgba(255, 255, 255, 0.2);
  --gradient-banner: linear-gradient(135deg, #101a30 0%, #1b2a4d 40%, #33275a 72%, #4a2f22 100%);
  --gradient-soft: linear-gradient(160deg, rgba(245, 182, 66, 0.1), rgba(111, 143, 214, 0.08));
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]):not(.light-mode) {
    --color-bg: #0d1220;
    --color-bg-alt: #131a2b;
    --color-surface: rgba(24, 33, 54, 0.66);
    --color-surface-solid: #182136;
    --color-text: #eef1f8;
    --color-text-soft: #c2cadd;
    --color-text-muted: #8e99b2;
    --color-primary: #6f8fd6;
    --color-primary-soft: #8aa6e0;
    --color-accent: #f5b642;
    --color-accent-deep: #ffca66;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-strong: rgba(255, 255, 255, 0.2);
    --gradient-banner: linear-gradient(135deg, #101a30 0%, #1b2a4d 40%, #33275a 72%, #4a2f22 100%);
    --gradient-soft: linear-gradient(160deg, rgba(245, 182, 66, 0.1), rgba(111, 143, 214, 0.08));
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(1200px 600px at 8% -6%, rgba(245, 182, 66, 0.14), transparent 60%),
    radial-gradient(1000px 520px at 96% 4%, rgba(74, 59, 122, 0.12), transparent 62%);
  background-attachment: fixed;
  transition: background-color 0.35s var(--ease), color 0.35s var(--ease);
  overflow-x: hidden;
}

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

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

a:hover,
a:focus-visible {
  color: var(--color-accent-deep);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(1.75rem, 1.1rem + 2.6vw, 3rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.4rem, 1.05rem + 1.4vw, 2.1rem);
  position: relative;
  padding-bottom: 0.35em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-accent);
}

h3 {
  font-size: clamp(1.1rem, 0.98rem + 0.55vw, 1.4rem);
  color: var(--color-text);
}

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

ul, ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
  color: var(--color-text-soft);
}

li {
  margin-bottom: 0.45em;
}

li::marker {
  color: var(--color-accent-deep);
}

strong {
  color: var(--color-text);
}

blockquote {
  margin: 1.2em 0;
  padding: 1.1em 1.3em;
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--gradient-soft);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--shadow-sm);
}

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

time {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

::selection {
  background: rgba(245, 182, 66, 0.35);
  color: var(--color-text);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-deep);
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-weight: 800;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.brand svg {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.brand:hover svg {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: var(--shadow-md);
}

.brand-name {
  font-size: 1.15rem;
  background: linear-gradient(90deg, var(--color-text), var(--color-primary-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

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

#main-nav li {
  margin: 0;
}

#main-nav a {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
  color: var(--color-text-soft);
  white-space: nowrap;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

#main-nav a:hover,
#main-nav a:focus-visible {
  color: var(--color-text);
  background: var(--gradient-soft);
  transform: translateY(-2px);
}

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

#site-search {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface-solid);
  overflow: hidden;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

#site-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(245, 182, 66, 0.18);
}

#search-input {
  width: 168px;
  padding: 8px 14px;
  border: 0;
  background: transparent;
  font-size: 0.88rem;
  outline: none;
}

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

#site-search button {
  padding: 8px 16px;
  border: 0;
  background: var(--gradient-accent);
  color: #1a2b4c;
  font-size: 0.85rem;
  font-weight: 700;
  transition: filter 0.25s var(--ease);
}

#site-search button:hover {
  filter: brightness(1.08);
}

#theme-toggle,
#menu-toggle {
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface-solid);
  color: var(--color-text-soft);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.25s var(--ease);
}

#theme-toggle:hover,
#menu-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px 40px;
}

main > section {
  margin: 32px 0;
  padding: clamp(20px, 3vw, 40px);
  background: var(--color-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

main > section:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.hero {
  position: relative;
  margin-top: 24px !important;
  padding: clamp(24px, 4vw, 56px) !important;
  background: var(--gradient-banner) !important;
  border-radius: var(--radius-xl) !important;
  color: #fff;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12) !important;
  box-shadow: var(--shadow-lg) !important;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 120%;
  background:
    radial-gradient(420px 220px at 18% 24%, rgba(245, 182, 66, 0.35), transparent 70%),
    radial-gradient(520px 260px at 82% 70%, rgba(138, 90, 60, 0.4), transparent 72%);
  pointer-events: none;
  animation: heroFloat 14s ease-in-out infinite alternate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 60% 40%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 60% 40%, #000 0%, transparent 78%);
  pointer-events: none;
}

@keyframes heroFloat {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(2%, 2%, 0) scale(1.06); }
}

.hero-slider {
  position: relative;
  z-index: 1;
  min-height: 220px;
}

.hero-slider .slide {
  display: none;
  animation: slideIn 0.6s var(--ease);
}

.hero-slider .slide.active {
  display: block;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-slider h1,
.hero-slider h2 {
  color: #fff;
  max-width: 22ch;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}

.hero-slider h2::after {
  background: var(--gradient-accent);
}

.hero-slider p {
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(0.95rem, 0.9rem + 0.25vw, 1.08rem);
}

.slider-controls {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.slider-controls button {
  padding: 9px 20px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 600;
  transition: all 0.25s var(--ease);
}

.slider-controls button:hover {
  background: var(--gradient-accent);
  border-color: transparent;
  color: #1a2b4c;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(245, 182, 66, 0.35);
}

.hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(24px, 4vw, 44px);
}

.hero-stats .stat {
  padding: 18px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: center;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease);
}

.hero-stats .stat:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.18);
}

.stat-num {
  display: block;
  font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.3rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.45;
}

#breadcrumb {
  margin: 20px 0 0;
  padding: 0 4px;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

#breadcrumb li {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

#breadcrumb li + li::before {
  content: "/";
  color: var(--color-border-strong);
}

#anchor-nav {
  margin: 20px 0;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

#anchor-nav h2 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#anchor-nav h2::after {
  display: none;
}

#anchor-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

#anchor-nav li {
  margin: 0;
}

#anchor-nav a {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface-solid);
  font-size: 0.86rem;
  color: var(--color-text-soft);
  transition: all 0.25s var(--ease);
}

#anchor-nav a:hover,
#anchor-nav a:focus-visible {
  color: #1a2b4c;
  background: var(--gradient-accent);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(245, 182, 66, 0.3);
}

#articles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

#articles > h2,
#articles > p {
  grid-column: 1 / -1;
}

#articles article {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px;
  border-radius: var(--radius-md);
  background: var(--color-surface-solid);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
  position: relative;
  overflow: hidden;
}

#articles article::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

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

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

#articles article h3 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.45;
}

#articles article h3 a {
  color: var(--color-text);
}

#articles article h3 a:hover {
  color: var(--color-accent-deep);
}

#articles article p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

#articles article > a:last-child {
  margin-top: auto;
  padding-top: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-primary-soft);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

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

#faq details {
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-solid);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

#faq summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  font-weight: 600;
  color: var(--color-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;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--color-accent-deep);
  font-size: 1.1rem;
  font-weight: 700;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--gradient-accent);
  color: #1a2b4c;
}

#faq summary:hover {
  background: var(--gradient-soft);
}

#faq details p {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 0.94rem;
  color: var(--color-text-soft);
  animation: fadeUp 0.4s var(--ease);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

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

#howto ol > li {
  counter-increment: step;
  position: relative;
  padding: 12px 16px 12px 58px;
  margin-bottom: 10px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-solid);
  border: 1px solid var(--color-border);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#howto ol > li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #1a2b4c;
  font-size: 0.85rem;
  font-weight: 800;
}

#howto ol > li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#contact ul,
#about ul,
#history ul,
#products ul,
#solutions ul,
#knowledge ul,
#sitemap ul,
#links ul,
#howto ul {
  list-style: none;
  padding-left: 0;
}

#contact ul li,
#about ul li,
#products ul li,
#solutions ul li,
#knowledge ul li,
#howto ul li {
  position: relative;
  padding-left: 22px;
}

#contact ul li::before,
#about ul li::before,
#products ul li::before,
#solutions ul li::before,
#knowledge ul li::before,
#howto ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transform: rotate(45deg);
}

#history ul li strong {
  color: var(--color-accent-deep);
}

#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface-solid);
  font-size: 0.87rem;
  color: var(--color-text-soft);
  transition: all 0.25s var(--ease);
}

#sitemap a:hover,
#links a:hover {
  color: #1a2b4c;
  background: var(--gradient-accent);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(245, 182, 66, 0.3);
}

#site-footer {
  position: relative;
  margin-top: 40px;
  padding: clamp(32px, 5vw, 60px) 24px 40px;
  background: var(--gradient-banner);
  color: rgba(255, 255, 255, 0.86);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  max-width: 100%;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 12% 0%, rgba(245, 182, 66, 0.22), transparent 70%),
    radial-gradient(600px 300px at 88% 100%, rgba(138, 90, 60, 0.28), transparent 72%);
  pointer-events: none;
}

#site-footer > section {
  position: relative;
  z-index: 1;
}

#site-footer h2 {
  font-size: 1.05rem;
  color: #fff;
  padding-bottom: 0.4em;
  margin-bottom: 0.8em;
}

#site-footer h2::after {
  width: 36px;
  height: 3px;
}

#site-footer p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
  line-height: 1.8;
}

#site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0 0 12px;
}

#site-footer li {
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.78);
}

#site-footer a {
  color: rgba(255, 255, 255, 0.86);
  border-bottom: 1px dashed transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

#site-footer a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: var(--gradient-accent);
  color: #1a2b4c;
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), filter 0.3s var(--ease);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
}

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

#back-to-top:hover {
  filter: brightness(1.06);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(245, 182, 66, 0.4);
}

.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 (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; }
}

@media (max-width: 1080px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }
  #main-nav {
    order: 3;
    flex-basis: 100%;
  }
  #main-nav ul {
    justify-content: flex-start;
  }
  #search-input {
    width: 130px;
  }
}

@media (max-width: 860px) {
  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  #articles {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  :root {
    --header-h: 64px;
  }
  .header-inner {
    padding: 10px 16px;
  }
  #menu-toggle {
    display: inline-block;
  }
  #main-nav {
    display: none;
    flex-basis: 100%;
    background: var(--color-surface-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px;
    box-shadow: var(--shadow-md);
  }
  #main-nav.open {
    display: block;
    animation: fadeUp 0.3s var(--ease);
  }
  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  #main-nav a {
    display: block;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
  }
  .header-tools {
    margin-left: auto;
  }
  #site-search {
    display: none;
  }
  main {
    padding: 0 16px 32px;
  }
  main > section {
    margin: 22px 0;
    border-radius: var(--radius-md);
  }
  .hero {
    border-radius: var(--radius-lg) !important;
  }
  .hero-slider h1,
  .hero-slider h2 {
    max-width: 100%;
  }
  .slider-controls button {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
  .hero-stats {
    gap: 10px;
  }
  .hero-stats .stat {
    padding: 14px 10px;
  }
  #anchor-nav {
    padding: 16px;
    border-radius: var(--radius-md);
  }
  #anchor-nav ul {
    gap: 8px;
  }
  #anchor-nav a {
    padding: 6px 12px;
    font-size: 0.82rem;
  }
  #articles article {
    padding: 18px;
  }
  #faq summary {
    padding: 14px 46px 14px 16px;
    font-size: 0.95rem;
  }
  #faq details p {
    padding: 0 16px 16px;
  }
  #howto ol > li {
    padding: 12px 12px 12px 52px;
  }
  #site-footer {
    padding: 36px 16px 30px;
    gap: 24px;
  }
  #back-to-top {
    right: 14px;
    bottom: 16px;
    padding: 10px 15px;
    font-size: 0.8rem;
  }
}

@media (max-width: 420px) {
  body {
    font-size: 15px;
  }
  .brand-name {
    font-size: 1rem;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .stat-label {
    font-size: 0.72rem;
  }
  #theme-toggle,
  #menu-toggle {
    padding: 7px 11px;
    font-size: 0.78rem;
  }
}

@media print {
  #site-header,
  #anchor-nav,
  #back-to-top,
  .slider-controls,
  #site-footer::before {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
  .hero {
    background: #fff !important;
    color: #000;
  }
  .hero-slider h1,
  .hero-slider h2,
  .hero-slider p {
    color: #000;
    text-shadow: none;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}