:root {
  --green-50: #e8f5e9;
  --green-100: #c8e6c9;
  --green-200: #a5d6a7;
  --green-300: #81c784;
  --green-400: #66bb6a;
  --green-500: #4caf50;
  --green-600: #43a047;
  --green-700: #388e3c;
  --green-800: #2e7d32;
  --green-900: #1b5e20;

  --accent: #ff8a65;
  --accent-soft: #ffe0d6;

  --bg: #f4faf5;
  --bg-alt: #ffffff;
  --bg-soft: #eef7ef;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --glass-border: rgba(255, 255, 255, 0.55);
  --text: #1f2d24;
  --text-soft: #4a5c50;
  --text-muted: #7a8b80;
  --border: #dcebdf;
  --shadow-sm: 0 2px 8px rgba(27, 94, 32, 0.06);
  --shadow-md: 0 10px 30px rgba(27, 94, 32, 0.10);
  --shadow-lg: 0 20px 50px rgba(27, 94, 32, 0.16);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --header-h: 72px;
  --maxw: 1180px;
  --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
  --grad-hero: linear-gradient(135deg, #4caf50 0%, #66bb6a 38%, #a5d6a7 70%, #ffccbc 100%);
  --grad-accent: linear-gradient(120deg, #4caf50, #81c784 55%, #ffab91);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html[data-theme="dark"] {
  --bg: #0f1712;
  --bg-alt: #16201a;
  --bg-soft: #131d17;
  --surface: rgba(30, 44, 36, 0.62);
  --surface-solid: #1a2620;
  --glass-border: rgba(120, 170, 135, 0.22);
  --text: #e6f2ea;
  --text-soft: #b9cdc1;
  --text-muted: #8ba396;
  --border: #26382e;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
  --green-50: #1d2e23;
  --green-100: #24382b;
  --accent-soft: #3a2a24;
  --grad-hero: linear-gradient(135deg, #1b5e20 0%, #2e7d32 40%, #388e3c 70%, #5d4037 100%);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #0f1712;
    --bg-alt: #16201a;
    --bg-soft: #131d17;
    --surface: rgba(30, 44, 36, 0.62);
    --surface-solid: #1a2620;
    --glass-border: rgba(120, 170, 135, 0.22);
    --text: #e6f2ea;
    --text-soft: #b9cdc1;
    --text-muted: #8ba396;
    --border: #26382e;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
    --green-50: #1d2e23;
    --green-100: #24382b;
    --accent-soft: #3a2a24;
    --grad-hero: linear-gradient(135deg, #1b5e20 0%, #2e7d32 40%, #388e3c 70%, #5d4037 100%);
  }
}

*,
*::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-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 10% -10%, rgba(76, 175, 80, 0.14), transparent 60%),
    radial-gradient(900px 500px at 110% 5%, rgba(255, 138, 101, 0.12), transparent 60%),
    radial-gradient(800px 600px at 50% 120%, rgba(129, 199, 132, 0.12), transparent 65%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

a {
  color: var(--green-700);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition), box-shadow var(--transition);
}

html[data-theme="dark"] a {
  color: var(--green-300);
}

a:hover,
a:focus-visible {
  color: var(--green-600);
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(76, 175, 80, 0.55);
  outline-offset: 2px;
  border-radius: 6px;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text);
}

h1 {
  font-size: clamp(1.7rem, 4.2vw, 2.7rem);
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  position: relative;
  padding-left: 16px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: var(--grad-accent);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.32rem);
  color: var(--green-800);
}

html[data-theme="dark"] h3 {
  color: var(--green-200);
}

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

ul,
ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
  color: var(--text-soft);
}

li {
  margin-bottom: 0.5em;
}

li::marker {
  color: var(--green-500);
}

strong {
  color: var(--text);
  font-weight: 700;
}

blockquote {
  margin: 0 0 1.2em;
  padding: 18px 22px;
  border-left: 4px solid var(--green-400);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-left-width: 4px;
  border-left-color: var(--green-400);
  box-shadow: var(--shadow-sm);
  color: var(--text-soft);
  font-style: normal;
}

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;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--green-600);
  color: #fff;
  border-radius: var(--radius-pill);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 12px;
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition), box-shadow var(--transition);
}

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

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  justify-content: space-between;
  align-items: center;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 0.78rem;
  color: var(--text-muted);
  border-bottom: 1px dashed var(--border);
}

.topbar span:first-child {
  color: var(--green-700);
  font-weight: 600;
}

html[data-theme="dark"] .topbar span:first-child {
  color: var(--green-300);
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 24px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.brand svg {
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(76, 175, 80, 0.35);
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand:hover svg {
  transform: rotate(-8deg) scale(1.06);
  box-shadow: 0 10px 24px rgba(76, 175, 80, 0.5);
}

.brand span {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

#site-header nav {
  flex: 1 1 auto;
}

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

#site-header nav li {
  margin: 0;
}

#site-header nav a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  position: relative;
  transition: color var(--transition), background-color var(--transition), transform var(--transition);
}

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

#site-header nav a:hover,
#site-header nav a:focus-visible {
  color: var(--green-700);
  background: var(--green-50);
  transform: translateY(-1px);
}

html[data-theme="dark"] #site-header nav a:hover,
html[data-theme="dark"] #site-header nav a:focus-visible {
  color: var(--green-200);
}

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

.search {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 4px 4px 4px 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
  flex: 0 1 260px;
}

.search:focus-within {
  border-color: var(--green-400);
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.15);
}

.search input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  padding: 6px 0;
}

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

.search input:focus {
  outline: none;
}

.search button {
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--grad-accent);
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

.search button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(76, 175, 80, 0.35);
  filter: brightness(1.05);
}

#theme-toggle,
#menu-toggle {
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text-soft);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition), background-color var(--transition);
  white-space: nowrap;
}

#theme-toggle:hover,
#menu-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--green-400);
  color: var(--green-700);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] #theme-toggle:hover,
html[data-theme="dark"] #menu-toggle:hover {
  color: var(--green-200);
}

#menu-toggle {
  display: none;
}

.breadcrumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px 4px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb li {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: "›";
  color: var(--green-400);
  font-weight: 700;
}

.breadcrumb a {
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 6px;
}

.breadcrumb a:hover {
  color: var(--green-700);
  background: var(--green-50);
}

.breadcrumb [aria-current="page"] {
  color: var(--green-700);
  font-weight: 600;
}

html[data-theme="dark"] .breadcrumb [aria-current="page"] {
  color: var(--green-300);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 8px 24px 64px;
}

main > section {
  margin: 0 0 28px;
  padding: clamp(22px, 4vw, 40px);
  background: var(--surface);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), background-color var(--transition);
}

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

#hero {
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
  border: 0;
  color: #f4fff6;
  box-shadow: var(--shadow-lg);
  padding: clamp(32px, 6vw, 64px);
  isolation: isolate;
}

#hero::before,
#hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  z-index: -1;
  animation: floaty 12s ease-in-out infinite;
}

#hero::before {
  width: 380px;
  height: 380px;
  top: -140px;
  right: -80px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.65), transparent 70%);
}

#hero::after {
  width: 320px;
  height: 320px;
  bottom: -160px;
  left: -60px;
  background: radial-gradient(circle, rgba(255, 204, 188, 0.7), transparent 70%);
  animation-delay: -6s;
}

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

#hero h1 {
  color: #ffffff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
  max-width: 22ch;
}

#hero p {
  color: rgba(255, 255, 255, 0.94);
  max-width: 78ch;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.12);
}

#hero .lead {
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
  will-change: transform;
}

.btn-primary {
  background: #ffffff;
  color: var(--green-800);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.26);
  color: var(--green-900);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  transform: translateY(-3px) scale(1.02);
  background: rgba(255, 255, 255, 0.28);
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
}

#intro ul,
#products ul,
#solutions ul,
#contact ul,
#sitemap ul,
#links ul,
#news ul {
  list-style: none;
  padding-left: 0;
}

#intro ul li,
#products ul li,
#solutions ul li,
#contact ul li {
  position: relative;
  padding: 12px 16px 12px 44px;
  margin-bottom: 10px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#intro ul li::before,
#products ul li::before,
#solutions ul li::before,
#contact ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 14px;
  height: 14px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--grad-accent);
  box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.14);
  transition: transform var(--transition);
}

#intro ul li:hover,
#products ul li:hover,
#solutions ul li:hover,
#contact ul li:hover {
  transform: translateX(4px);
  border-color: var(--green-300);
  box-shadow: var(--shadow-sm);
}

#intro ul li:hover::before,
#products ul li:hover::before,
#solutions ul li:hover::before,
#contact ul li:hover::before {
  transform: scale(1.2);
}

.meta {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-soft);
  border: 1px dashed var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  margin: 4px 0 0;
}

#cases blockquote {
  margin-bottom: 14px;
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

#news ul {
  display: grid;
  gap: 10px;
}

#news ul li {
  position: relative;
  padding: 14px 18px 14px 20px;
  margin: 0;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--green-400);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

#news ul li:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
  border-left-color: var(--accent);
}

#news ul li strong {
  color: var(--green-700);
  margin-right: 8px;
}

html[data-theme="dark"] #news ul li strong {
  color: var(--green-300);
}

#articles article {
  position: relative;
  margin: 0 0 18px;
  padding: 22px 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

#articles article::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--grad-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--green-200);
}

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

#articles article h3 {
  margin-bottom: 0.4em;
  transition: color var(--transition);
}

#articles article:hover h3 {
  color: var(--green-600);
}

html[data-theme="dark"] #articles article:hover h3 {
  color: var(--green-300);
}

#articles article .meta {
  margin-bottom: 12px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--green-50);
  color: var(--green-700);
  transition: background-color var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

#articles article a:hover {
  background: var(--grad-accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(76, 175, 80, 0.3);
}

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

html[data-theme="dark"] #articles article a {
  color: var(--green-200);
}

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

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 14px 18px 14px 58px;
  margin-bottom: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#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;
  font-size: 0.85rem;
  font-weight: 800;
  color: #fff;
  background: var(--grad-accent);
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.35);
  transition: transform var(--transition);
}

#howto ol li:hover {
  transform: translateX(4px);
  border-color: var(--green-300);
  box-shadow: var(--shadow-sm);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.12);
}

#howto ul li {
  list-style: none;
  position: relative;
  padding-left: 26px;
}

#howto ul li::before {
  content: "✓";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--green-500);
  font-weight: 800;
}

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

#faq details:hover {
  border-color: var(--green-300);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: var(--green-300);
  box-shadow: var(--shadow-md);
}

#faq summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 56px 16px 20px;
  font-weight: 600;
  color: var(--text);
  transition: background-color var(--transition), color var(--transition);
  user-select: none;
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green-50);
  color: var(--green-700);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1;
  transition: transform var(--transition), background-color var(--transition), color var(--transition);
}

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

#faq summary:hover {
  background: var(--green-50);
  color: var(--green-700);
}

html[data-theme="dark"] #faq summary:hover {
  color: var(--green-200);
}

#faq details p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--text-soft);
  animation: fadeSlide 0.35s ease;
}

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

#knowledge p {
  padding: 16px 20px;
  background: linear-gradient(120deg, var(--green-50), transparent 80%);
  border-radius: var(--radius);
  border-left: 4px solid var(--green-400);
}

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

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

#sitemap ul a,
#links ul a {
  display: inline-block;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-soft);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: transform var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#sitemap ul a:hover,
#links ul a:hover {
  transform: translateY(-3px);
  color: #fff;
  background: var(--grad-accent);
  border-color: transparent;
  box-shadow: 0 10px 22px rgba(76, 175, 80, 0.3);
}

#contact ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 10px;
}

#contact ul li {
  margin: 0;
}

footer {
  position: relative;
  margin-top: 24px;
  padding: clamp(32px, 5vw, 56px) 24px 28px;
  background: linear-gradient(180deg, var(--bg-soft), var(--bg-alt));
  border-top: 1px solid var(--border);
  color: var(--text-soft);
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-accent);
}

.footer-info,
.footer-legal,
.copyright {
  max-width: var(--maxw);
  margin: 0 auto;
}

.footer-info {
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--border);
}

.footer-info p {
  margin: 0 0 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-info p:first-child {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--green-700);
}

html[data-theme="dark"] .footer-info p:first-child {
  color: var(--green-300);
}

.footer-legal {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px 32px;
  padding: 24px 0;
}

.footer-legal h3 {
  font-size: 0.98rem;
  margin-bottom: 0.5em;
  color: var(--text);
}

.footer-legal p {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}

.copyright {
  padding-top: 18px;
  border-top: 1px dashed var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  margin: 0 auto;
}

#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 90;
  padding: 12px 18px;
  border: 0;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff;
  background: var(--grad-accent);
  box-shadow: 0 10px 26px rgba(76, 175, 80, 0.4);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.92);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), box-shadow var(--transition);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 16px 34px rgba(76, 175, 80, 0.55);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  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: 1024px) {
  .nav-wrap {
    gap: 12px;
  }
  .search {
    flex: 1 1 180px;
  }
  #site-header nav a {
    padding: 7px 10px;
    font-size: 0.88rem;
  }
}

@media (max-width: 860px) {
  :root {
    --radius-lg: 22px;
  }

  .topbar {
    justify-content: center;
    text-align: center;
    font-size: 0.72rem;
    padding: 6px 16px;
  }

  .nav-wrap {
    padding: 10px 16px;
    gap: 10px;
  }

  #menu-toggle {
    display: inline-block;
    margin-left: auto;
  }

  #site-header nav {
    order: 10;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
  }

  #site-header nav.is-open {
    max-height: 520px;
    opacity: 1;
  }

  #site-header nav ul {
    flex-direction: column;
    gap: 2px;
    padding: 8px 0 4px;
    border-top: 1px dashed var(--border);
  }

  #site-header nav a {
    display: block;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
  }

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

  .search {
    flex: 1 1 100%;
    order: 11;
    max-width: 100%;
  }

  .breadcrumb {
    padding: 12px 16px 0;
  }

  main {
    padding: 6px 14px 48px;
  }

  main > section {
    margin-bottom: 20px;
    padding: 22px 18px;
  }

  #hero {
    padding: 30px 20px;
  }

  #hero h1 {
    max-width: none;
  }

  .hero-actions {
    gap: 10px;
  }

  .btn-primary,
  .btn-secondary {
    flex: 1 1 auto;
    padding: 12px 20px;
  }

  #articles article {
    padding: 18px 16px;
  }

  #faq summary {
    padding: 14px 50px 14px 16px;
  }

  #faq details p {
    padding: 0 16px 16px;
  }

  .footer-legal {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  #back-to-top {
    right: 14px;
    bottom: 16px;
    padding: 10px 14px;
    font-size: 0.78rem;
  }

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

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

  .brand {
    font-size: 1.05rem;
  }

  .brand svg {
    width: 30px;
    height: 30px;
  }

  #theme-toggle,
  #menu-toggle {
    padding: 8px 12px;
    font-size: 0.78rem;
  }

  h2 {
    padding-left: 14px;
  }

  h2::before {
    width: 5px;
  }

  #intro ul li,
  #products ul li,
  #solutions ul li,
  #contact ul li {
    padding: 10px 12px 10px 38px;
  }

  #howto ol li {
    padding: 12px 14px 12px 50px;
  }

  #howto ol li::before {
    left: 10px;
    width: 26px;
    height: 26px;
    font-size: 0.78rem;
  }

  #sitemap ul a,
  #links ul a {
    padding: 8px 14px;
    font-size: 0.84rem;
  }
}

@media print {
  #site-header,
  #back-to-top,
  .breadcrumb,
  .search,
  #theme-toggle,
  #menu-toggle,
  .hero-actions {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    background: #fff;
    break-inside: avoid;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}