:root {
  --brand: #0f6f5c;
  --brand-light: #14a085;
  --brand-dark: #0a5244;
  --accent: #f2b705;
  --accent-soft: #ffd95c;
  --bg: #f6faf9;
  --bg-alt: #ffffff;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --border-glass: rgba(255, 255, 255, 0.55);
  --text: #17211f;
  --text-soft: #4a5a56;
  --text-muted: #74847f;
  --shadow-sm: 0 2px 8px rgba(15, 111, 92, 0.08);
  --shadow-md: 0 8px 28px rgba(15, 111, 92, 0.12);
  --shadow-lg: 0 18px 48px rgba(15, 111, 92, 0.18);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --max-width: 1180px;
  --transition: 0.32s cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #2fbf9f;
    --brand-light: #3dd6b3;
    --brand-dark: #0f6f5c;
    --accent: #ffcb3d;
    --accent-soft: #ffe08a;
    --bg: #0c1614;
    --bg-alt: #101d1a;
    --bg-card: #14231f;
    --bg-glass: rgba(20, 35, 31, 0.72);
    --border-glass: rgba(120, 220, 195, 0.16);
    --text: #e8f5f1;
    --text-soft: #b7cdc7;
    --text-muted: #8aa39d;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.58);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(20, 160, 133, 0.12), transparent 42%),
    radial-gradient(circle at 88% 12%, rgba(242, 183, 5, 0.1), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(15, 111, 92, 0.08), transparent 55%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

h1,
h2,
h3,
h4 {
  line-height: 1.35;
  color: var(--text);
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  margin: 0 0 0.6em;
}

h2 {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 700;
  margin: 0 0 0.8em;
  position: relative;
  padding-bottom: 0.5em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--brand-light), var(--accent));
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  margin: 1.6em 0 0.6em;
}

h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.2em 0 0.5em;
  color: var(--brand);
}

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(--brand-light);
}

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

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

blockquote {
  margin: 1.2em 0;
  padding: 1.1em 1.4em;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

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

header#top {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
}

header#top nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header#top nav > a {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--brand);
  letter-spacing: 0.04em;
  padding: 0.3em 0.6em;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(20, 160, 133, 0.14), rgba(242, 183, 5, 0.14));
  transition: transform var(--transition), box-shadow var(--transition);
}

header#top nav > a:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  color: var(--brand-dark);
}

header#top nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.4rem;
}

header#top nav ul li {
  margin: 0;
}

header#top nav ul li a {
  display: inline-block;
  padding: 0.4em 0.85em;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: 999px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

header#top nav ul li a:hover {
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  color: #ffffff;
  transform: translateY(-2px);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

section {
  margin: 2.5rem 0;
  padding: 2rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  animation: fadeUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  transition: box-shadow var(--transition), transform var(--transition);
}

section:hover {
  box-shadow: var(--shadow-lg);
}

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

@supports (animation-timeline: view()) {
  section {
    animation-timeline: view();
    animation-range: entry 0% cover 28%;
    animation-name: fadeUp;
    animation-fill-mode: both;
  }
}

#banner {
  position: relative;
  margin-top: 1.75rem;
  padding: 3rem 2rem;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand) 42%, var(--brand-light) 78%, var(--accent) 130%);
  background-size: 200% 200%;
  animation: gradientShift 14s ease infinite;
  color: #ffffff;
  overflow: hidden;
  border: none;
  box-shadow: var(--shadow-lg);
}

#banner::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 68%);
  pointer-events: none;
}

#banner::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -8%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 183, 5, 0.28), transparent 70%);
  pointer-events: none;
}

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

#banner h1 {
  color: #ffffff;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.28);
  position: relative;
  z-index: 1;
}

#banner p {
  color: rgba(255, 255, 255, 0.92);
  max-width: 60ch;
  position: relative;
  z-index: 1;
}

#banner figure {
  margin: 1.75rem 0 0;
  position: relative;
  z-index: 1;
}

#banner figure svg {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.32);
  transition: transform var(--transition);
}

#banner figure:hover svg {
  transform: scale(1.015);
}

#banner figcaption {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
}

#about,
#products,
#solutions,
#cases,
#news,
#articles,
#faq,
#howto,
#contact,
#sitemap,
#links {
  scroll-margin-top: 88px;
}

#about ul,
#products ul,
#solutions ul,
#howto ul,
#howto ol {
  padding-left: 1.3em;
}

#products h3 {
  margin-top: 2em;
}

#products h3:first-of-type {
  margin-top: 0.5em;
}

#products ul li strong,
#solutions ul li strong {
  color: var(--brand);
}

#cases blockquote {
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

#cases blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

#cases blockquote p::before {
  content: "\201C";
  font-size: 2.2rem;
  color: var(--accent);
  line-height: 0;
  vertical-align: -0.35em;
  margin-right: 0.15em;
}

#news ul {
  list-style: none;
  padding-left: 0;
}

#news ul li {
  position: relative;
  padding: 0.65em 0.9em 0.65em 2.4em;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}

#news ul li::before {
  content: "";
  position: absolute;
  left: 0.9em;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-light), var(--accent));
  box-shadow: 0 0 0 4px rgba(20, 160, 133, 0.14);
}

#news ul li:hover {
  background: rgba(20, 160, 133, 0.07);
  transform: translateX(4px);
}

#news time {
  display: inline-block;
  margin-right: 0.7em;
  font-weight: 600;
  color: var(--brand);
}

#articles article {
  padding: 1.4rem 1.5rem;
  margin: 1.2rem 0;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#articles article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(20, 160, 133, 0.4);
}

#articles article h3 {
  margin-top: 0;
  color: var(--brand);
  transition: color var(--transition);
}

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

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

#articles article a {
  display: inline-block;
  font-weight: 600;
  padding: 0.35em 0.9em;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(20, 160, 133, 0.14), rgba(242, 183, 5, 0.16));
  transition: background var(--transition), transform var(--transition), color var(--transition);
}

#articles article a:hover {
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  color: #ffffff;
  transform: translateY(-2px);
}

#faq h3 {
  margin-top: 1.8em;
  padding: 0.7em 1em;
  background: linear-gradient(90deg, rgba(20, 160, 133, 0.1), transparent 85%);
  border-left: 4px solid var(--brand-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 1.08rem;
  transition: background var(--transition), border-color var(--transition);
}

#faq h3:hover {
  background: linear-gradient(90deg, rgba(242, 183, 5, 0.16), transparent 85%);
  border-left-color: var(--accent);
}

#faq h3 + p {
  margin-top: 0.5em;
  padding-left: 0.2em;
}

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

#howto ol li {
  counter-increment: howto;
  position: relative;
  padding: 0.7em 0.9em 0.7em 3em;
  margin-bottom: 0.6em;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

#howto ol li::before {
  content: counter(howto);
  position: absolute;
  left: 0.7em;
  top: 50%;
  transform: translateY(-50%);
  width: 1.7em;
  height: 1.7em;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffffff;
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  border-radius: 50%;
  box-shadow: 0 3px 10px rgba(15, 111, 92, 0.3);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
}

#howto ul li {
  padding: 0.4em 0.6em;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

#howto ul li:hover {
  background: rgba(20, 160, 133, 0.07);
}

#contact p {
  padding: 0.45em 0.8em;
  margin: 0 0 0.3em;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  transition: transform var(--transition), box-shadow var(--transition);
}

#contact p:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
}

#sitemap ul,
#links ul {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

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

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 0.45em 1.05em;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-soft);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

footer {
  background: linear-gradient(160deg, var(--brand-dark) 0%, var(--brand) 60%, var(--brand-light) 120%);
  color: rgba(255, 255, 255, 0.9);
  padding: 3rem 1.5rem 2rem;
  margin-top: 3rem;
  border-top-left-radius: var(--radius-xl);
  border-top-right-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 183, 5, 0.22), transparent 70%);
  pointer-events: none;
}

footer section {
  max-width: var(--max-width);
  margin: 0 auto 1.75rem;
  padding: 1.5rem 1.6rem;
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
  animation: none;
  transition: background var(--transition), transform var(--transition);
}

footer section:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

footer h2 {
  color: #ffffff;
  font-size: 1.15rem;
  margin-bottom: 0.6em;
}

footer h2::after {
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
}

footer p {
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 0.6em;
}

footer > p {
  max-width: var(--max-width);
  margin: 0 auto 0.4rem;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.72);
}

footer a {
  color: var(--accent-soft);
}

footer a:hover {
  color: #ffffff;
}

@media (max-width: 900px) {
  header#top nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.75rem 1rem;
  }

  header#top nav ul {
    width: 100%;
    gap: 0.3rem;
  }

  header#top nav ul li a {
    padding: 0.35em 0.7em;
    font-size: 0.85rem;
  }

  section {
    padding: 1.6rem 1.25rem;
    border-radius: var(--radius);
    margin: 1.75rem 0;
  }

  #banner {
    padding: 2.25rem 1.4rem;
    border-radius: var(--radius-lg);
  }

  #banner p {
    max-width: 100%;
  }

  footer {
    padding: 2.25rem 1rem 1.5rem;
  }

  footer section {
    padding: 1.25rem 1.15rem;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  main {
    padding: 0 0.9rem 3rem;
  }

  section {
    padding: 1.35rem 1rem;
    border-radius: var(--radius);
  }

  #banner {
    padding: 1.9rem 1.1rem;
    margin-top: 1.25rem;
  }

  #banner h1 {
    font-size: 1.5rem;
  }

  #articles article {
    padding: 1.1rem 1.05rem;
  }

  #faq h3 {
    padding: 0.6em 0.8em;
    font-size: 1rem;
  }

  #howto ol li {
    padding-left: 2.7em;
  }

  #sitemap ul,
  #links ul {
    gap: 0.45rem;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 0.4em 0.85em;
    font-size: 0.85rem;
  }

  footer {
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  header#top,
  footer,
  #banner figure {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

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