:root {
  --color-primary: #1b4332;
  --color-primary-light: #2d6a4f;
  --color-primary-dark: #081c15;
  --color-accent: #95d5b2;
  --color-accent-soft: #b7e4c7;
  --color-highlight: #d8f3dc;
  --color-bg: #f4faf6;
  --color-bg-alt: #e8f5ec;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.72);
  --color-surface-glass-strong: rgba(255, 255, 255, 0.9);
  --color-text: #1a2e24;
  --color-text-soft: #4a6358;
  --color-text-muted: #7a9186;
  --color-border: rgba(27, 67, 50, 0.12);
  --color-border-strong: rgba(27, 67, 50, 0.22);
  --gradient-hero: linear-gradient(135deg, #081c15 0%, #1b4332 35%, #2d6a4f 65%, #40916c 100%);
  --gradient-accent: linear-gradient(120deg, #95d5b2 0%, #52b788 50%, #2d6a4f 100%);
  --gradient-card: linear-gradient(160deg, rgba(255,255,255,0.95) 0%, rgba(216,243,220,0.55) 100%);
  --gradient-soft: linear-gradient(135deg, #e8f5ec 0%, #d8f3dc 100%);
  --shadow-sm: 0 2px 8px rgba(8, 28, 21, 0.06);
  --shadow-md: 0 8px 24px rgba(8, 28, 21, 0.09);
  --shadow-lg: 0 18px 48px rgba(8, 28, 21, 0.14);
  --shadow-glow: 0 0 32px rgba(149, 213, 178, 0.35);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 40px;
  --radius-pill: 999px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --header-height: 72px;
  --content-width: 1200px;
  --content-narrow: 860px;
}

[data-theme="dark"] {
  --color-primary: #95d5b2;
  --color-primary-light: #b7e4c7;
  --color-primary-dark: #d8f3dc;
  --color-accent: #52b788;
  --color-accent-soft: #2d6a4f;
  --color-highlight: #1b4332;
  --color-bg: #0a1410;
  --color-bg-alt: #0f1f18;
  --color-surface: #12241c;
  --color-surface-glass: rgba(18, 36, 28, 0.72);
  --color-surface-glass-strong: rgba(18, 36, 28, 0.92);
  --color-text: #e4f2ea;
  --color-text-soft: #b3cdbf;
  --color-text-muted: #7f9c8d;
  --color-border: rgba(149, 213, 178, 0.14);
  --color-border-strong: rgba(149, 213, 178, 0.28);
  --gradient-hero: linear-gradient(135deg, #040b08 0%, #0a1a13 35%, #123024 65%, #1b4332 100%);
  --gradient-accent: linear-gradient(120deg, #52b788 0%, #40916c 50%, #2d6a4f 100%);
  --gradient-card: linear-gradient(160deg, rgba(18,36,28,0.95) 0%, rgba(27,67,50,0.5) 100%);
  --gradient-soft: linear-gradient(135deg, #0f1f18 0%, #12241c 100%);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 32px rgba(82, 183, 136, 0.3);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(149, 213, 178, 0.18) 0%, transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(82, 183, 136, 0.14) 0%, transparent 46%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

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

h1 { font-size: clamp(1.75rem, 4vw, 2.9rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

p {
  color: var(--color-text-soft);
  margin-bottom: 1rem;
}

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

::selection {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

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

::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--color-accent-soft);
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-bg-alt);
}

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

#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--color-surface-glass);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
  background: var(--color-surface-glass-strong);
}

.header-inner {
  max-width: var(--content-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: scale(1.04);
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

#main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-soft);
  border-radius: var(--radius-pill);
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}

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

#main-nav a:hover,
#main-nav a:focus-visible {
  color: var(--color-primary);
  background: rgba(149, 213, 178, 0.16);
}

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

#theme-toggle {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), background var(--transition-fast), box-shadow var(--transition-fast);
}

#theme-toggle:hover {
  transform: rotate(20deg) scale(1.1);
  box-shadow: var(--shadow-glow);
  background: var(--color-highlight);
}

#mobile-menu-btn {
  display: none;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

#mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

#mobile-menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

#mobile-menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

#mobile-menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

main {
  padding-top: var(--header-height);
}

section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 72px 24px;
}

section > h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 36px;
  padding-bottom: 14px;
}

section > h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  transition: width var(--transition-slow);
}

section:hover > h2::after {
  width: 100%;
}

section > h3 {
  margin: 32px 0 14px;
  color: var(--color-primary-light);
}

section > p,
section > ul,
section > ol {
  max-width: var(--content-narrow);
}

section ul,
section ol {
  margin-bottom: 1.25rem;
}

section ul li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  color: var(--color-text-soft);
}

section ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: 0 0 0 3px rgba(149, 213, 178, 0.2);
  transition: transform var(--transition-fast);
}

section ul li:hover::before {
  transform: scale(1.35);
}

section ol {
  counter-reset: step-counter;
}

section ol li {
  position: relative;
  padding-left: 44px;
  margin-bottom: 14px;
  color: var(--color-text-soft);
  counter-increment: step-counter;
}

section ol li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: var(--gradient-accent);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

#hero {
  position: relative;
  max-width: 100%;
  margin: 0;
  padding: 96px 24px 80px;
  background: var(--gradient-hero);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  overflow: hidden;
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(149, 213, 178, 0.28) 0%, transparent 38%),
    radial-gradient(circle at 82% 78%, rgba(82, 183, 136, 0.22) 0%, transparent 42%),
    radial-gradient(circle at 50% 0%, rgba(216, 243, 220, 0.14) 0%, transparent 55%);
  z-index: -1;
  animation: heroGlow 14s ease-in-out infinite alternate;
}

#hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 78%);
  z-index: -1;
  opacity: 0.6;
}

@keyframes heroGlow {
  0%   { transform: scale(1) translate(0, 0); opacity: 0.9; }
  50%  { transform: scale(1.08) translate(-1.5%, 1.5%); opacity: 1; }
  100% { transform: scale(1.04) translate(1.5%, -1.5%); opacity: 0.85; }
}

.hero-content {
  max-width: var(--content-width);
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  color: #f4faf6;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  line-height: 1.28;
  margin-bottom: 24px;
  text-shadow: 0 4px 28px rgba(0, 0, 0, 0.35);
  animation: fadeUp 0.9s var(--transition-slow) both;
}

.hero-lead {
  max-width: 780px;
  margin: 0 auto 18px;
  font-size: clamp(1rem, 1.6vw, 1.14rem);
  line-height: 1.9;
  color: rgba(244, 250, 246, 0.88);
  animation: fadeUp 0.9s 0.12s var(--transition-slow) both;
}

.hero-sub {
  display: inline-block;
  margin: 0 auto 36px;
  padding: 10px 26px;
  font-size: 0.94rem;
  letter-spacing: 0.08em;
  color: var(--color-accent-soft);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(149, 213, 178, 0.3);
  border-radius: var(--radius-pill);
  animation: fadeUp 0.9s 0.2s var(--transition-slow) both;
}

.hero-actions {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 0.9s 0.3s var(--transition-slow) both;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 38px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-base);
}

.btn-primary {
  color: var(--color-primary-dark);
  background: var(--gradient-accent);
  box-shadow: 0 10px 30px rgba(82, 183, 136, 0.4);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 100%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  transition: left var(--transition-slow);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 16px 40px rgba(82, 183, 136, 0.55);
  color: var(--color-primary-dark);
}

.btn-primary:hover::before {
  left: 120%;
}

.btn-secondary {
  color: #f4faf6;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(244, 250, 246, 0.42);
}

.btn-secondary:hover {
  transform: translateY(-3px) scale(1.03);
  background: rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  color: #ffffff;
}

.hero-stats {
  max-width: var(--content-width);
  margin: 64px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.stat-item {
  padding: 26px 16px;
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid rgba(149, 213, 178, 0.22);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
  animation: fadeUp 0.9s var(--transition-slow) both;
}

.stat-item:nth-child(1) { animation-delay: 0.35s; }
.stat-item:nth-child(2) { animation-delay: 0.45s; }
.stat-item:nth-child(3) { animation-delay: 0.55s; }
.stat-item:nth-child(4) { animation-delay: 0.65s; }

.stat-item:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.14);
  box-shadow: var(--shadow-glow);
}

.stat-number {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.stat-label {
  display: block;
  margin-top: 8px;
  font-size: 0.86rem;
  color: rgba(244, 250, 246, 0.78);
  letter-spacing: 0.05em;
}

#breadcrumb {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 20px 24px 0;
}

#breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

#breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

#breadcrumb li + li::before {
  content: "/";
  color: var(--color-text-muted);
  opacity: 0.55;
}

#breadcrumb a {
  color: var(--color-text-muted);
}

#breadcrumb a:hover {
  color: var(--color-primary-light);
}

#breadcrumb [aria-current="page"] {
  color: var(--color-primary-light);
  font-weight: 600;
}

#brand {
  padding-top: 56px;
}

#brand h3 {
  display: flex;
  align-items: center;
  gap: 12px;
}

#brand h3::before {
  content: "";
  width: 6px;
  height: 22px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  flex-shrink: 0;
}

#brand ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px 28px;
  max-width: 100%;
}

#brand ul li {
  padding: 14px 18px 14px 40px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#brand ul li::before {
  left: 18px;
}

#brand ul li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

#products {
  background: var(--gradient-soft);
  max-width: 100%;
  border-radius: var(--radius-xl);
  margin: 24px auto;
}

#products > h2,
#products > h3,
#products > p,
#products > ul {
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

#products h3 {
  padding: 24px 28px 18px;
  margin: 24px auto 0;
  max-width: var(--content-width);
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  color: var(--color-primary-light);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#products h3 + p {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 28px 24px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

#products h3:hover {
  transform: translateY(-2px);
}

#products h3:hover + p {
  box-shadow: var(--shadow-md);
}

#products > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
  margin-top: 32px;
}

#products > ul li {
  padding: 22px 24px 22px 48px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#products > ul li::before {
  left: 22px;
  top: 1.5em;
}

#products > ul li:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

#solutions {
  position: relative;
}

#solutions h3 {
  padding: 22px 26px;
  margin: 28px auto 0;
  max-width: var(--content-narrow);
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#solutions h3:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-primary-light);
}

#solutions h3 + p {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: 16px 26px 22px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-top: none;
  border-left: 5px solid var(--color-accent);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  margin-bottom: 8px;
}

#solutions > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  max-width: 100%;
  margin-top: 32px;
}

#solutions > ul li {
  padding: 20px 22px 20px 46px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  font-size: 0.95rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

#solutions > ul li::before {
  left: 20px;
  top: 1.4em;
}

#solutions > ul li:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: var(--shadow-md);
  background: var(--color-surface);
}

#cases {
  background: var(--gradient-soft);
  max-width: 100%;
  border-radius: var(--radius-xl);
  margin: 24px auto;
}

#cases > h2,
#cases > h3,
#cases > p,
#cases > blockquote {
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

#cases h3 {
  margin-top: 32px;
  padding: 20px 26px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border-bottom: none;
  color: var(--color-primary-light);
}

#cases h3 + p {
  margin: 0 auto;
  padding: 0 26px 24px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-sm);
}

#cases blockquote {
  position: relative;
  margin: 24px auto;
  padding: 28px 32px 28px 56px;
  background: var(--color-surface-glass-strong);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#cases blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-family: var(--font-serif);
  font-size: 4rem;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.55;
}

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

#cases blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#news article,
#articles article {
  position: relative;
  padding: 26px 28px;
  margin-bottom: 20px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#news article::before,
#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

#news article:hover::before,
#articles article:hover::before {
  opacity: 1;
}

#news article h3,
#articles article h3 {
  margin-bottom: 8px;
  font-size: 1.18rem;
}

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

#news article h3 a:hover,
#articles article h3 a:hover {
  color: var(--color-primary-light);
}

#news time,
#articles time {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

#articles article > a:last-child {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary-light);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

#articles article > a:last-child::after {
  content: "\2192";
  transition: transform var(--transition-base);
}

#articles article > a:last-child:hover {
  gap: 10px;
  color: var(--color-accent);
}

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

#faq details {
  margin-bottom: 14px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

#faq details:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

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

#faq summary {
  position: relative;
  padding: 18px 52px 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-primary-dark);
  background: var(--gradient-accent);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: translateY(-50%) rotate(180deg);
}

#faq summary:hover {
  color: var(--color-primary-light);
  background: rgba(149, 213, 178, 0.1);
}

#faq details p {
  margin: 0;
  padding: 0 24px 22px;
  font-size: 0.95rem;
  line-height: 1.85;
  animation: fadeIn 0.4s var(--transition-base) both;
}

#howto {
  background: var(--gradient-soft);
  max-width: 100%;
  border-radius: var(--radius-xl);
  margin: 24px auto;
}

#howto > h2,
#howto > h3,
#howto > p,
#howto > ul,
#howto > ol {
  max-width: var(--content-narrow);
  margin-left: auto;
  margin-right: auto;
}

#howto h3 {
  margin-top: 28px;
  padding-bottom: 10px;
  border-bottom: 2px dashed var(--color-border-strong);
  color: var(--color-primary-light);
}

#howto ol {
  counter-reset: howto-counter;
}

#howto ol li {
  padding: 18px 20px 18px 56px;
  margin-bottom: 14px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  counter-increment: howto-counter;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#howto ol li::before {
  content: counter(howto-counter);
  left: 18px;
  top: 18px;
  width: 30px;
  height: 30px;
  font-size: 0.85rem;
}

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

#howto > ul li {
  padding: 12px 18px 12px 40px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

#howto > ul li::before {
  left: 16px;
  top: 1.3em;
}

#howto > ul li:hover {
  transform: translateX(4px);
  border-color: var(--color-accent);
}

#contact {
  position: relative;
}

#contact > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  max-width: 100%;
}

#contact > ul li {
  padding: 20px 22px;
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  font-size: 0.95rem;
  color: var(--color-text-soft);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

#contact > ul li::before {
  display: none;
}

#contact > ul li:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  color: var(--color-text);
}

#sitemap ul,
#links ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  max-width: 100%;
}

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

#sitemap ul li::before,
#links ul li::before {
  display: none;
}

#sitemap a,
#links a {
  display: block;
  padding: 14px 20px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--color-text-soft);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-4px);
  color: var(--color-primary-dark);
  background: var(--gradient-accent);
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

#privacy,
#disclaimer,
#copyright {
  padding-top: 48px;
  padding-bottom: 48px;
}

#privacy p,
#disclaimer p,
#copyright p {
  max-width: var(--content-narrow);
}

#copyright p:last-child {
  font-size: 0.86rem;
  color: var(--color-text-muted);
}

#site-footer {
  position: relative;
  margin-top: 40px;
  background: var(--gradient-hero);
  color: rgba(244, 250, 246, 0.82);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(149, 213, 178, 0.16) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(82, 183, 136, 0.14) 0%, transparent 45%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 64px 24px 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
  gap: 36px;
}

.footer-col h3 {
  margin-bottom: 18px;
  font-size: 1.05rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(244, 250, 246, 0.72);
  margin: 0;
}

.footer-col ul li {
  padding: 0;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: rgba(244, 250, 246, 0.72);
}

.footer-col ul li::before {
  display: none;
}

.footer-col a {
  color: rgba(244, 250, 246, 0.72);
  position: relative;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-col a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transform: translateY(-50%);
  border-radius: var(--radius-pill);
  transition: width var(--transition-base);
}

.footer-col a:hover {
  color: var(--color-accent);
  padding-left: 14px;
}

.footer-col a:hover::before {
  width: 8px;
}

.footer-bottom {
  position: relative;
  border-top: 1px solid rgba(149, 213, 178, 0.16);
  padding: 22px 24px;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.84rem;
  color: rgba(244, 250, 246, 0.6);
  letter-spacing: 0.03em;
}

#back-to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 900;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-primary-dark);
  background: var(--gradient-accent);
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.85);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

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

#back-to-top:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 20px 44px rgba(82, 183, 136, 0.5);
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.8s var(--transition-slow), transform 0.8s var(--transition-slow);
  will-change: opacity, transform;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

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

@media (max-width: 1080px) {
  .header-inner {
    padding: 0 18px;
    gap: 12px;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.86rem;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 64px;
  }

  #mobile-menu-btn {
    display: flex;
  }

  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: var(--color-surface-glass-strong);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-bottom: 1px solid var(--color-border);
    transition: max-height var(--transition-slow), box-shadow var(--transition-base);
    justify-content: flex-start;
  }

  #main-nav.open {
    max-height: 520px;
    box-shadow: var(--shadow-lg);
  }

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 18px 20px;
    width: 100%;
  }

  #main-nav a {
    padding: 14px 16px;
    font-size: 0.98rem;
    border-radius: var(--radius-sm);
  }

  #main-nav a::after {
    display: none;
  }

  .logo-text {
    font-size: 1.1rem;
  }

  section {
    padding: 56px 20px;
  }

  #hero {
    padding: 72px 20px 64px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 48px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 48px 20px 32px;
  }

  #back-to-top {
    right: 18px;
    bottom: 18px;
    width: 44px;
    height: 44px;
  }
}

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

  section {
    padding: 48px 16px;
  }

  #hero {
    padding: 56px 16px 52px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 14px 20px;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .stat-item {
    padding: 20px 10px;
  }

  .stat-label {
    font-size: 0.78rem;
  }

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

  #products h3,
  #products h3 + p,
  #cases h3,
  #cases h3 + p {
    padding-left: 18px;
    padding-right: 18px;
  }

  #cases blockquote {
    padding: 24px 20px 24px 44px;
  }

  #cases blockquote::before {
    left: 12px;
    font-size: 3rem;
  }

  #faq summary {
    padding: 16px 48px 16px 18px;
    font-size: 0.95rem;
  }

  #faq details p {
    padding: 0 18px 18px;
  }

  #news article,
  #articles article {
    padding: 20px 18px;
  }

  #howto ol li {
    padding: 16px 16px 16px 50px;
  }

  #howto ol li::before {
    left: 14px;
    top: 16px;
  }

  .footer-bottom {
    padding: 18px 16px;
  }
}

@media print {
  #site-header,
  #back-to-top,
  #mobile-menu-btn,
  #theme-toggle,
  .hero-actions {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  section {
    page-break-inside: avoid;
  }
}