:root {
  --lime-50: #f4fbe9;
  --lime-100: #e6f6d0;
  --lime-200: #cdeea6;
  --lime-300: #a8d97c;
  --lime-400: #7bc043;
  --lime-500: #5fa82c;
  --lime-600: #4e9a2f;
  --lime-700: #3d7a24;
  --lime-800: #2f5e1a;
  --lime-900: #1f3d10;
  --mint-100: #e0f7f1;
  --mint-300: #8fdfc8;
  --mint-500: #3fb8a0;
  --peach-200: #ffe6d5;
  --peach-400: #ffb98a;
  --ink-900: #16281a;
  --ink-700: #2c4231;
  --ink-500: #4a6350;
  --ink-300: #7d9484;
  --ink-100: #c3d2c7;
  --bg: #f6fbf1;
  --bg-elev: #ffffff;
  --bg-soft: #eef7e4;
  --text: var(--ink-900);
  --text-soft: var(--ink-500);
  --text-mute: var(--ink-300);
  --border: rgba(78, 154, 47, 0.16);
  --border-strong: rgba(78, 154, 47, 0.32);
  --glass: rgba(255, 255, 255, 0.62);
  --glass-border: rgba(255, 255, 255, 0.75);
  --shadow-sm: 0 2px 8px rgba(47, 94, 26, 0.06);
  --shadow-md: 0 10px 30px rgba(47, 94, 26, 0.10);
  --shadow-lg: 0 24px 60px rgba(47, 94, 26, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --grad-hero: linear-gradient(135deg, #eaf7e0 0%, #d3f0c2 28%, #b7e9c9 55%, #a9e6e0 80%, #d9f5e6 100%);
  --grad-accent: linear-gradient(120deg, var(--lime-400), var(--mint-500));
  --grad-card: linear-gradient(160deg, rgba(255, 255, 255, 0.9), rgba(234, 247, 224, 0.55));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 132px;
  color-scheme: light;
}

html[data-theme="dark"],
body.dark-mode {
  --bg: #0d1710;
  --bg-elev: #14231a;
  --bg-soft: #10201a;
  --text: #e8f5e0;
  --text-soft: #a9c4b1;
  --text-mute: #72927d;
  --border: rgba(168, 217, 124, 0.16);
  --border-strong: rgba(168, 217, 124, 0.34);
  --glass: rgba(20, 35, 26, 0.58);
  --glass-border: rgba(168, 217, 124, 0.22);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.6);
  --grad-hero: linear-gradient(135deg, #0f2418 0%, #123222 30%, #0f3a2c 60%, #0c2f33 85%, #10251a 100%);
  --grad-card: linear-gradient(160deg, rgba(30, 52, 38, 0.85), rgba(18, 34, 26, 0.65));
  color-scheme: dark;
}

*,
*::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;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(1100px 520px at 8% -6%, rgba(168, 217, 124, 0.28), transparent 62%),
    radial-gradient(900px 480px at 96% 4%, rgba(143, 223, 200, 0.24), transparent 60%),
    radial-gradient(760px 420px at 50% 108%, rgba(255, 185, 138, 0.14), transparent 65%);
  background-attachment: fixed;
  transition: background-color 0.45s var(--ease-soft), color 0.35s var(--ease-soft);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--lime-600);
  text-decoration: none;
  transition: color 0.25s var(--ease-soft), opacity 0.25s var(--ease-soft);
}

a:hover {
  color: var(--lime-500);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--lime-300);
  outline-offset: 3px;
  border-radius: 6px;
}

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

h1 {
  font-size: clamp(1.75rem, 1.2rem + 2.4vw, 3rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.4vw, 2.1rem);
  position: relative;
  padding-left: 0.9em;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 999px;
  background: var(--grad-accent);
  box-shadow: 0 0 14px rgba(123, 192, 67, 0.45);
}

h3 {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  color: var(--ink-700);
}

html[data-theme="dark"] h3,
body.dark-mode h3 {
  color: var(--lime-200);
}

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

ul, ol {
  padding-left: 1.35em;
  margin: 0 0 1em;
  color: var(--text-soft);
}

li {
  margin: 0.35em 0;
}

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

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

blockquote {
  margin: 1.2em 0;
  padding: 1.1em 1.4em;
  border-left: 4px solid var(--lime-400);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-top: 1px solid var(--glass-border);
  border-right: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

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

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

::selection {
  background: var(--lime-300);
  color: var(--lime-900);
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(47, 94, 26, 0.06);
  transition: background 0.4s var(--ease-soft), box-shadow 0.4s var(--ease-soft);
}

.brand-bar {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
}

.brand-bar > a {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  position: relative;
  padding-right: 6px;
  transition: filter 0.3s var(--ease-soft);
}

.brand-bar > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 3px;
  border-radius: 999px;
  background: var(--grad-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.brand-bar > a:hover::after,
.brand-bar > a:focus-visible::after {
  transform: scaleX(1);
}

.brand-bar > a:hover {
  filter: brightness(1.08) drop-shadow(0 0 10px rgba(123, 192, 67, 0.45));
}

.brand-bar > span {
  font-size: 0.85rem;
  color: var(--text-mute);
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px dashed var(--border-strong);
  background: var(--bg-soft);
  white-space: nowrap;
}

.brand-bar nav[aria-label="站内搜索"] {
  margin-left: auto;
}

.brand-bar form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 0.3s var(--ease-soft), box-shadow 0.3s var(--ease-soft), transform 0.3s var(--ease);
}

.brand-bar form[role="search"]:focus-within {
  border-color: var(--lime-400);
  box-shadow: 0 0 0 4px rgba(123, 192, 67, 0.18), var(--shadow-md);
  transform: translateY(-1px);
}

.brand-bar label[for="site-search"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.brand-bar input[type="search"] {
  border: 0;
  background: transparent;
  padding: 10px 16px;
  font-size: 0.92rem;
  color: var(--text);
  width: 220px;
  max-width: 46vw;
  font-family: inherit;
  outline: none;
}

.brand-bar input[type="search"]::placeholder {
  color: var(--text-mute);
}

.brand-bar button[type="submit"] {
  border: 0;
  cursor: pointer;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--grad-accent);
  transition: filter 0.25s var(--ease-soft), letter-spacing 0.25s var(--ease-soft);
}

.brand-bar button[type="submit"]:hover {
  filter: brightness(1.08);
  letter-spacing: 0.06em;
}

#theme-toggle {
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease-soft), background 0.3s var(--ease-soft), color 0.3s var(--ease-soft);
  white-space: nowrap;
}

#theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: var(--lime-400);
  color: #fff;
  border-color: transparent;
}

#theme-toggle:active {
  transform: translateY(0) scale(0.97);
}

header > nav[aria-label="主导航"] {
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, rgba(123, 192, 67, 0.05));
}

header > nav[aria-label="主导航"] ul {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

header > nav[aria-label="主导航"] li {
  margin: 0;
}

header > nav[aria-label="主导航"] a {
  display: block;
  padding: 12px 16px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-soft);
  border-radius: 999px;
  position: relative;
  white-space: nowrap;
  transition: color 0.25s var(--ease-soft), background 0.25s var(--ease-soft), transform 0.25s var(--ease);
}

header > nav[aria-label="主导航"] a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 6px;
  width: 0;
  height: 3px;
  border-radius: 999px;
  background: var(--grad-accent);
  transform: translateX(-50%);
  transition: width 0.3s var(--ease);
}

header > nav[aria-label="主导航"] a:hover,
header > nav[aria-label="主导航"] a:focus-visible {
  color: var(--lime-700);
  background: var(--lime-100);
  transform: translateY(-2px);
}

html[data-theme="dark"] header > nav[aria-label="主导航"] a:hover,
body.dark-mode header > nav[aria-label="主导航"] a:hover {
  color: var(--lime-200);
  background: rgba(123, 192, 67, 0.14);
}

header > nav[aria-label="主导航"] a:hover::after {
  width: 40%;
}

main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

main > section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 40px);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.35s var(--ease-soft);
  animation: rise-in 0.7s var(--ease) both;
}

main > section::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(600px 200px at 100% 0%, rgba(168, 217, 124, 0.12), transparent 70%);
  opacity: 0.9;
}

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

main > section > * {
  position: relative;
  z-index: 1;
}

#hero {
  background: var(--grad-hero);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: clamp(28px, 4.5vw, 56px);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  inset: -40%;
  z-index: -1;
  background:
    radial-gradient(closest-side, rgba(255, 255, 255, 0.55), transparent) 18% 22% / 34% 34% no-repeat,
    radial-gradient(closest-side, rgba(143, 223, 200, 0.5), transparent) 82% 12% / 40% 40% no-repeat,
    radial-gradient(closest-side, rgba(255, 185, 138, 0.35), transparent) 68% 92% / 36% 36% no-repeat;
  filter: blur(6px);
  animation: drift 22s ease-in-out infinite alternate;
}

#hero h1 {
  max-width: 22ch;
  background: linear-gradient(120deg, var(--lime-800), var(--lime-600) 45%, var(--mint-500));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  text-wrap: balance;
}

html[data-theme="dark"] #hero h1,
body.dark-mode #hero h1 {
  background: linear-gradient(120deg, var(--lime-200), var(--lime-300) 50%, var(--mint-300));
  -webkit-background-clip: text;
  background-clip: text;
}

#hero > p {
  max-width: 68ch;
  font-size: clamp(0.98rem, 0.94rem + 0.25vw, 1.08rem);
  color: var(--ink-700);
}

html[data-theme="dark"] #hero > p,
body.dark-mode #hero > p {
  color: var(--text-soft);
}

#hero figure {
  margin: 28px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  box-shadow: var(--shadow-md);
  transition: transform 0.6s var(--ease), box-shadow 0.6s var(--ease);
}

#hero figure:hover {
  transform: translateY(-6px) scale(1.005);
  box-shadow: var(--shadow-lg);
}

#hero figure svg {
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 320;
  object-fit: cover;
  transition: transform 0.9s var(--ease);
}

#hero figure:hover svg {
  transform: scale(1.03);
}

#hero figcaption {
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--text-mute);
  text-align: center;
  border-top: 1px solid var(--border);
  background: var(--glass);
}

nav[aria-label="面包屑导航"] ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 0;
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-mute);
}

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

nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--lime-400);
  font-weight: 700;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-soft);
  padding: 2px 4px;
  border-radius: 6px;
  transition: color 0.25s var(--ease-soft), background 0.25s var(--ease-soft);
}

nav[aria-label="面包屑导航"] a:hover {
  color: var(--lime-600);
  background: var(--lime-100);
}

nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--lime-700);
  font-weight: 600;
}

#products ul,
#solutions ul,
#contact ul,
#howto ul,
#howto ol,
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 12px;
}

#products ul li,
#solutions ul li,
#contact ul li,
#howto ul li,
#howto ol li,
#sitemap ul li,
#links ul li {
  position: relative;
  padding: 14px 18px 14px 46px;
  margin: 0;
  border-radius: var(--radius-md);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), background 0.35s var(--ease-soft), border-color 0.35s var(--ease-soft);
}

#products ul li::before,
#solutions ul li::before,
#contact ul li::before,
#howto ul li::before,
#howto ol li::before,
#sitemap ul li::before,
#links ul li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: var(--grad-accent);
  box-shadow: 0 0 0 4px rgba(123, 192, 67, 0.14);
  transition: transform 0.35s var(--ease), 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);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 4px 12px rgba(78, 154, 47, 0.35);
}

#products ul li:hover,
#solutions ul li:hover,
#contact ul li:hover,
#howto ul li:hover,
#howto ol li:hover,
#sitemap ul li:hover,
#links ul li:hover {
  transform: translateX(6px);
  background: var(--bg-elev);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

#products ul li:hover::before,
#solutions ul li:hover::before,
#contact ul li:hover::before,
#howto ul li:hover::before,
#howto ol li:hover::before,
#sitemap ul li:hover::before,
#links ul li:hover::before {
  transform: translateY(-50%) scale(1.15);
  box-shadow: 0 0 0 6px rgba(123, 192, 67, 0.2);
}

#cases blockquote {
  background: var(--grad-card);
}

#news > h3,
#cases > h3,
#articles > h3 {
  margin-top: 1.4em;
}

#news > h3 + p,
#cases > h3 + p {
  font-size: 0.95rem;
}

#news p:first-of-type::first-line {
  color: var(--lime-700);
  font-weight: 600;
}

#articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 20px;
  align-items: start;
}

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

#articles article {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 22px 18px;
  border-radius: var(--radius-md);
  background: var(--grad-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.35s var(--ease-soft);
}

#articles article::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.35) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.9s var(--ease);
  opacity: 0.6;
}

#articles article:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

#articles article:hover::after {
  transform: translateX(120%);
}

#articles article h3 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.45;
  transition: color 0.3s var(--ease-soft);
}

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

html[data-theme="dark"] #articles article:hover h3,
body.dark-mode #articles article:hover h3 {
  color: var(--lime-300);
}

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

#articles article p:first-of-type {
  font-size: 0.78rem;
  color: var(--text-mute);
  letter-spacing: 0.04em;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--border);
}

#articles article p:nth-of-type(2) {
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

#articles article p:last-of-type {
  margin-top: 8px;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--lime-600);
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  align-self: flex-start;
  transition: background 0.3s var(--ease-soft), color 0.3s var(--ease-soft), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

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

#articles article a:hover {
  background: var(--grad-accent);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(78, 154, 47, 0.3);
}

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

#faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-soft);
  margin-bottom: 12px;
  overflow: hidden;
  transition: background 0.35s var(--ease-soft), border-color 0.35s var(--ease-soft), box-shadow 0.35s var(--ease);
}

#faq details[open] {
  background: var(--bg-elev);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

#faq details:hover {
  border-color: var(--border-strong);
}

#faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 52px 16px 20px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  position: relative;
  transition: color 0.25s var(--ease-soft), background 0.25s var(--ease-soft);
  border-radius: var(--radius-md);
}

#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%;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime-700);
  background: var(--lime-100);
  transition: transform 0.4s var(--ease), background 0.3s var(--ease-soft), color 0.3s var(--ease-soft);
}

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

#faq summary:hover {
  color: var(--lime-700);
}

html[data-theme="dark"] #faq summary:hover,
body.dark-mode #faq summary:hover {
  color: var(--lime-300);
}

#faq details > p {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 0.93rem;
  animation: fade-down 0.45s var(--ease) both;
}

#howto h3 {
  margin-top: 1.3em;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--border);
}

#howto h3:first-of-type {
  margin-top: 0;
}

#contact ul {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}

#contact h3 + p,
#contact p {
  font-size: 0.95rem;
}

#sitemap ul,
#links ul {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}

#sitemap ul li,
#links ul li {
  padding: 12px 16px 12px 42px;
  font-size: 0.92rem;
}

#sitemap ul li a,
#links ul li a {
  color: var(--text);
  font-weight: 600;
}

#sitemap ul li a:hover,
#links ul li a:hover {
  color: var(--lime-600);
}

#privacy,
#disclaimer,
#security {
  background: var(--grad-card);
}

#privacy p,
#disclaimer p,
#security p {
  font-size: 0.94rem;
  text-align: justify;
}

#privacy::after,
#disclaimer::after,
#security::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(143, 223, 200, 0.35), transparent);
  pointer-events: none;
}

footer {
  margin-top: 24px;
  background: linear-gradient(180deg, var(--bg-soft), var(--bg-elev));
  border-top: 1px solid var(--border);
  padding: 40px 24px 32px;
  position: relative;
}

footer > section,
footer > p,
footer > nav {
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
}

footer > section {
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  transition: box-shadow 0.4s var(--ease), transform 0.4s var(--ease);
}

footer > section:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

footer > section h2 {
  font-size: 1.1rem;
  padding-left: 0.8em;
}

footer > section p {
  font-size: 0.88rem;
  margin: 0 0 0.6em;
}

footer > section p:last-child {
  margin-bottom: 0;
  color: var(--text-mute);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}

footer > p {
  font-size: 0.82rem;
  color: var(--text-mute);
  text-align: center;
  padding: 8px 0;
}

footer > nav[aria-label="页脚导航"] ul {
  list-style: none;
  padding: 0;
  margin: 12px auto 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
}

footer > nav[aria-label="页脚导航"] li {
  margin: 0;
}

footer > nav[aria-label="页脚导航"] a {
  font-size: 0.85rem;
  color: var(--text-soft);
  padding: 4px 10px;
  border-radius: 999px;
  transition: color 0.25s var(--ease-soft), background 0.25s var(--ease-soft);
}

footer > nav[aria-label="页脚导航"] a:hover {
  color: var(--lime-700);
  background: var(--lime-100);
}

html[data-theme="dark"] footer > nav[aria-label="页脚导航"] a:hover,
body.dark-mode footer > nav[aria-label="页脚导航"] a:hover {
  color: var(--lime-200);
  background: rgba(123, 192, 67, 0.16);
}

#back-to-top {
  display: block;
  margin: 0 auto;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  padding: 12px 30px;
  border-radius: 999px;
  background: var(--grad-accent);
  box-shadow: 0 10px 26px rgba(78, 154, 47, 0.32);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), filter 0.3s var(--ease-soft);
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 16px 36px rgba(78, 154, 47, 0.42);
  filter: brightness(1.06);
}

#back-to-top:active {
  transform: translateY(-1px) scale(0.98);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes drift {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg);
  }
  50% {
    transform: translate3d(2%, -2%, 0) rotate(3deg);
  }
  100% {
    transform: translate3d(-2%, 2%, 0) rotate(-3deg);
  }
}

@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;
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 176px;
  }

  .brand-bar {
    padding: 12px 18px;
    gap: 10px 14px;
  }

  .brand-bar > span {
    order: 4;
    flex-basis: 100%;
    text-align: center;
  }

  .brand-bar nav[aria-label="站内搜索"] {
    flex: 1 1 200px;
    margin-left: 0;
  }

  .brand-bar form[role="search"] {
    width: 100%;
  }

  .brand-bar input[type="search"] {
    width: 100%;
    max-width: none;
    flex: 1;
  }

  main {
    padding: 24px 18px 48px;
    gap: 24px;
  }

  header > nav[aria-label="主导航"] ul {
    padding: 0 18px;
    gap: 2px;
  }

  header > nav[aria-label="主导航"] a {
    padding: 10px 13px;
    font-size: 0.86rem;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 188px;
    --radius-lg: 20px;
    --radius-xl: 24px;
  }

  body {
    font-size: 15px;
    background-attachment: scroll;
  }

  .brand-bar {
    flex-wrap: wrap;
  }

  .brand-bar > a {
    font-size: 1.25rem;
  }

  #theme-toggle {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  main > section {
    padding: 20px 18px;
  }

  #hero {
    padding: 24px 20px;
  }

  #hero figure svg {
    aspect-ratio: 16 / 9;
  }

  #articles {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  #articles article p:nth-of-type(2) {
    -webkit-line-clamp: 4;
  }

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

  #faq summary {
    padding: 14px 46px 14px 16px;
    font-size: 0.93rem;
  }

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

  footer {
    padding: 28px 16px 24px;
  }

  footer > section {
    padding: 18px 18px;
  }

  blockquote {
    padding: 0.9em 1.1em;
  }
}

@media (hover: none) {
  #products ul li:hover,
  #solutions ul li:hover,
  #contact ul li:hover,
  #howto ul li:hover,
  #howto ol li:hover,
  #sitemap ul li:hover,
  #links ul li:hover,
  #articles article:hover,
  #hero figure:hover {
    transform: none;
  }
}