/* Insight AI Shopping Assistant — shared styles */

:root {
  --color-bg-dark: #0a0a0b;
  --color-bg-light: #ffffff;
  --color-bg-muted: #fafafa;
  --color-bg-card: #111113;
  --color-bg-card-light: #f4f4f5;
  --color-text-primary: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-dark: #18181b;
  --color-text-muted: #71717a;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-light: #e4e4e7;
  --color-purple: #8b5cf6;
  --color-indigo: #6366f1;
  --color-cyan: #22d3ee;
  --color-pink: #f43f5e;
  --gradient-accent: linear-gradient(135deg, var(--color-purple) 0%, var(--color-indigo) 45%, var(--color-cyan) 100%);
  --gradient-cta: linear-gradient(135deg, var(--color-purple), var(--color-indigo));
  --font-sans: "Inter", "Noto Sans SC", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 0 1px rgba(139, 92, 246, 0.3), 0 20px 60px rgba(99, 102, 241, 0.15);
  --header-height: 4.5rem;
  --container-max: 75rem;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-dark);
  background: var(--color-bg-light);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
:focus-visible { outline: 2px solid var(--color-indigo); outline-offset: 2px; }

.skip-link {
  position: absolute; top: -100%; left: var(--space-4); z-index: 10000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-dark); color: var(--color-text-primary);
  border-radius: var(--radius-sm);
}
.skip-link:focus { top: var(--space-4); }

.container { width: min(100% - 2rem, var(--container-max)); margin-inline: auto; }
.section { padding-block: var(--space-16); }
.section--dark { background: var(--color-bg-dark); color: var(--color-text-primary); }
.section--muted { background: var(--color-bg-muted); }

.section__eyebrow {
  display: inline-block; margin-bottom: var(--space-4);
  font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-cyan);
}
.section--light .section__eyebrow, .section--muted .section__eyebrow { color: var(--color-indigo); }
.section__title { margin: 0 0 var(--space-4); font-size: clamp(1.75rem, 4vw, 2.5rem); line-height: 1.15; letter-spacing: -0.02em; }
.section__subtitle { margin: 0 0 var(--space-10); max-width: 42rem; font-size: 1.0625rem; color: var(--color-text-secondary); }
.section--light .section__subtitle, .section--muted .section__subtitle { color: var(--color-text-muted); }
.text-gradient { background: var(--gradient-accent); -webkit-background-clip: text; background-clip: text; color: transparent; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-height);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
}
.site-header.is-scrolled { background: rgba(10, 10, 11, 0.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--color-border); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: var(--space-4); }
.site-logo { display: flex; align-items: center; gap: var(--space-3); font-weight: 700; font-size: 1rem; color: var(--color-text-primary); white-space: nowrap; }
.site-logo__mark { width: 2rem; height: 2rem; border-radius: var(--radius-sm); background: var(--gradient-accent); display: grid; place-items: center; font-size: 0.75rem; font-weight: 800; color: #fff; }
.site-nav { display: none; align-items: center; gap: var(--space-1); }
.site-nav__link { padding: var(--space-2) var(--space-3); font-size: 0.875rem; color: var(--color-text-secondary); border-radius: var(--radius-sm); transition: color var(--transition), background var(--transition); }
.site-nav__link:hover, .site-nav__link.is-active { color: var(--color-text-primary); background: rgba(255, 255, 255, 0.06); }
.site-header__actions { display: flex; align-items: center; gap: var(--space-3); }
.lang-switch { display: none; align-items: center; gap: var(--space-2); font-size: 0.8125rem; color: var(--color-text-secondary); }
.lang-switch a { padding: var(--space-1) var(--space-2); border-radius: var(--radius-sm); transition: color var(--transition), background var(--transition); }
.lang-switch a:hover, .lang-switch a.is-active { color: var(--color-text-primary); background: rgba(255, 255, 255, 0.08); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: 0.75rem 1.25rem; font-size: 0.9375rem; font-weight: 600;
  border-radius: var(--radius-full); border: none; cursor: pointer;
  transition: transform var(--transition), opacity var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--gradient-cta); color: #fff; box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35); }
.btn--secondary { background: rgba(255, 255, 255, 0.08); color: var(--color-text-primary); border: 1px solid var(--color-border); }
.btn--outline-light { background: transparent; color: var(--color-text-primary); border: 1px solid rgba(255, 255, 255, 0.2); }
.btn--dark { background: var(--color-text-dark); color: #fff; }
.btn--full { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn.is-loading { pointer-events: none; }

.menu-toggle {
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 2.5rem; height: 2.5rem; padding: 0;
  background: transparent; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); cursor: pointer;
}
.menu-toggle__bar { display: block; width: 1.125rem; height: 2px; margin-inline: auto; background: var(--color-text-primary); transition: transform var(--transition), opacity var(--transition); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  position: fixed; inset: var(--header-height) 0 0 0; z-index: 999;
  padding: var(--space-6); background: rgba(10, 10, 11, 0.98); backdrop-filter: blur(16px);
  transform: translateX(100%); transition: transform var(--transition); overflow-y: auto;
}
.mobile-nav.is-open { transform: translateX(0); }
.mobile-nav__link { display: block; padding: var(--space-4) 0; font-size: 1.125rem; color: var(--color-text-primary); border-bottom: 1px solid var(--color-border); }
.mobile-nav__actions { display: flex; flex-direction: column; gap: var(--space-3); margin-top: var(--space-8); }

.hero {
  padding-top: calc(var(--header-height) + var(--space-16)); padding-bottom: var(--space-20);
  background: radial-gradient(ellipse 80% 60% at 70% 20%, rgba(99, 102, 241, 0.18), transparent),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(139, 92, 246, 0.12), transparent), var(--color-bg-dark);
  color: var(--color-text-primary);
}
.hero__grid { display: grid; gap: var(--space-12); align-items: center; }
.hero__eyebrow {
  display: inline-block; margin-bottom: var(--space-4); padding: var(--space-2) var(--space-4);
  font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--color-cyan); background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2); border-radius: var(--radius-full);
}
.hero__title { margin: 0 0 var(--space-5); font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.08; letter-spacing: -0.03em; }
.hero__subtitle { margin: 0 0 var(--space-8); max-width: 34rem; font-size: 1.125rem; color: var(--color-text-secondary); }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-8); }
.hero__trust { display: flex; flex-wrap: wrap; gap: var(--space-4) var(--space-6); }
.hero__trust-item { display: flex; align-items: center; gap: var(--space-2); font-size: 0.875rem; color: var(--color-text-secondary); }
.hero__trust-item svg { flex-shrink: 0; color: var(--color-cyan); }
.product-def {
  margin-top: var(--space-8); padding: var(--space-5);
  background: rgba(255, 255, 255, 0.04); border-left: 3px solid var(--color-purple);
  border-radius: 0 var(--radius-md) var(--radius-md) 0; font-size: 0.9375rem; color: var(--color-text-secondary);
}

.ui-mock { position: relative; padding: var(--space-4); background: var(--color-bg-card); border-radius: var(--radius-xl); box-shadow: var(--shadow-glow); border: 1px solid rgba(139, 92, 246, 0.25); }
.ui-mock__header { display: flex; align-items: center; gap: var(--space-2); padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-4); }
.ui-mock__dot { width: 0.625rem; height: 0.625rem; border-radius: 50%; background: var(--color-text-muted); }
.ui-mock__dot--red { background: var(--color-pink); }
.ui-mock__dot--yellow { background: #fbbf24; }
.ui-mock__dot--green { background: #34d399; }
.ui-mock__title { margin-left: var(--space-2); font-size: 0.8125rem; color: var(--color-text-secondary); }
.chat { display: flex; flex-direction: column; gap: var(--space-4); }
.chat__bubble { max-width: 90%; padding: var(--space-3) var(--space-4); border-radius: var(--radius-lg); font-size: 0.875rem; line-height: 1.5; }
.chat__bubble--user { align-self: flex-end; background: rgba(99, 102, 241, 0.25); color: var(--color-text-primary); border-bottom-right-radius: var(--space-1); }
.chat__bubble--ai { align-self: flex-start; background: rgba(255, 255, 255, 0.06); color: var(--color-text-secondary); border-bottom-left-radius: var(--space-1); }
.chat__tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.chat__tag { padding: var(--space-1) var(--space-3); font-size: 0.75rem; color: var(--color-cyan); background: rgba(34, 211, 238, 0.1); border: 1px solid rgba(34, 211, 238, 0.2); border-radius: var(--radius-full); }
.product-cards { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.product-card { display: grid; grid-template-columns: 4.5rem 1fr; gap: var(--space-3); padding: var(--space-3); background: rgba(255, 255, 255, 0.04); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.product-card__img { width: 4.5rem; height: 4.5rem; border-radius: var(--radius-sm); background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(34, 211, 238, 0.2)); display: grid; place-items: center; font-size: 1.5rem; }
.product-card__name { margin: 0 0 var(--space-1); font-size: 0.8125rem; font-weight: 600; color: var(--color-text-primary); }
.product-card__price { margin: 0 0 var(--space-2); font-size: 0.875rem; color: var(--color-cyan); font-weight: 600; }
.product-card__reason { margin: 0 0 var(--space-2); font-size: 0.75rem; color: var(--color-text-secondary); }
.product-card__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.product-card__btn { padding: var(--space-1) var(--space-3); font-size: 0.6875rem; font-weight: 600; border-radius: var(--radius-full); border: none; cursor: pointer; }
.product-card__btn--primary { background: var(--gradient-cta); color: #fff; }
.product-card__btn--ghost { background: transparent; color: var(--color-text-secondary); border: 1px solid var(--color-border); }

.card-grid { display: grid; gap: var(--space-6); }
.card-grid--2, .card-grid--3, .card-grid--4 { grid-template-columns: 1fr; }
.feature-card { padding: var(--space-6); background: var(--color-bg-light); border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); transition: box-shadow var(--transition), transform var(--transition); }
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.section--dark .feature-card { background: var(--color-bg-card); border-color: var(--color-border); }
.feature-card__icon { width: 2.75rem; height: 2.75rem; margin-bottom: var(--space-4); display: grid; place-items: center; border-radius: var(--radius-md); background: rgba(99, 102, 241, 0.12); color: var(--color-indigo); font-size: 1.25rem; }
.section--dark .feature-card__icon { background: rgba(139, 92, 246, 0.15); color: var(--color-purple); }
.feature-card__title { margin: 0 0 var(--space-2); font-size: 1.0625rem; font-weight: 600; }
.feature-card__text { margin: 0; font-size: 0.9375rem; color: var(--color-text-muted); }
.section--dark .feature-card__text { color: var(--color-text-secondary); }

.timeline { display: grid; gap: var(--space-4); }
.timeline__item { display: grid; grid-template-columns: 2.5rem 1fr; gap: var(--space-4); align-items: start; }
.timeline__num { width: 2.5rem; height: 2.5rem; display: grid; place-items: center; font-size: 0.875rem; font-weight: 700; color: #fff; background: var(--gradient-cta); border-radius: 50%; }
.timeline__title { margin: 0 0 var(--space-1); font-size: 1rem; font-weight: 600; }
.timeline__text { margin: 0; font-size: 0.9375rem; color: var(--color-text-muted); }

.compare { display: grid; gap: var(--space-6); }
.compare__col { padding: var(--space-6); border-radius: var(--radius-lg); }
.compare__col--before { background: var(--color-bg-muted); border: 1px solid var(--color-border-light); }
.compare__col--after { background: var(--color-bg-dark); color: var(--color-text-primary); border: 1px solid rgba(139, 92, 246, 0.3); }
.compare__label { display: inline-block; margin-bottom: var(--space-4); padding: var(--space-1) var(--space-3); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; border-radius: var(--radius-full); }
.compare__col--before .compare__label { background: rgba(244, 63, 94, 0.1); color: var(--color-pink); }
.compare__col--after .compare__label { background: rgba(34, 211, 238, 0.12); color: var(--color-cyan); }
.compare__list { margin: 0; padding: 0; list-style: none; }
.compare__list li { position: relative; padding-left: var(--space-6); margin-bottom: var(--space-3); font-size: 0.9375rem; }
.compare__list li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-text-muted); }
.compare__col--after .compare__list li::before { background: var(--color-cyan); }

.usecase-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--space-4); }
.usecase {
  position: relative; grid-column: span 4; min-height: 22.5rem; overflow: hidden;
  border-radius: var(--radius-md); background: #20242c; color: var(--color-text-primary); isolation: isolate;
}
.usecase:nth-child(4), .usecase:nth-child(5) { grid-column: span 6; }
.usecase__img {
  position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.45s ease;
}
.usecase::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(to top, rgba(8, 10, 14, 0.96) 8%, rgba(8, 10, 14, 0.24) 74%);
}
.usecase:hover .usecase__img { transform: scale(1.035); }
.usecase__content { position: absolute; inset: auto var(--space-6) var(--space-6); }
.usecase__label {
  display: inline-block; margin-bottom: var(--space-2); font-size: 0.6875rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-cyan);
}
.usecase__title { margin: 0 0 var(--space-2); font-size: 1.375rem; line-height: 1.25; }
.usecase__text { margin: 0; font-size: 0.8125rem; line-height: 1.6; color: #c5cad4; }

.integration-layout { display: grid; gap: var(--space-12); align-items: center; }
.integration-copy .section__subtitle { margin-bottom: var(--space-8); }
.platform-list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.platform-list span {
  padding: var(--space-2) var(--space-3); font-size: 0.75rem; font-weight: 600;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04); color: var(--color-text-secondary);
}
.integration-map {
  position: relative; min-height: 26rem; display: grid; place-items: center;
}
.integration-map::before, .integration-map::after {
  content: ""; position: absolute; inset: 12% 6%; border: 1px dashed rgba(255, 255, 255, 0.15); border-radius: 50%;
}
.integration-map::after { inset: 27% 23%; }
.core-node {
  z-index: 2; width: 8.375rem; height: 8.375rem; display: grid; place-items: center;
  border-radius: 50%; background: var(--color-bg-dark); color: var(--color-text-primary);
  text-align: center; font-size: 0.875rem; font-weight: 700; line-height: 1.35; box-shadow: var(--shadow-lg);
}
.orbit-node {
  position: absolute; z-index: 3; min-width: 6.5rem; padding: var(--space-2) var(--space-3);
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06); color: var(--color-text-secondary);
  font-size: 0.6875rem; font-weight: 600; box-shadow: var(--shadow-sm);
}
.orbit-node:nth-of-type(2) { top: 4%; left: 38%; }
.orbit-node:nth-of-type(3) { top: 24%; right: 1%; }
.orbit-node:nth-of-type(4) { right: 8%; bottom: 12%; }
.orbit-node:nth-of-type(5) { bottom: 3%; left: 28%; }
.orbit-node:nth-of-type(6) { left: 0; bottom: 25%; }
.orbit-node:nth-of-type(7) { left: 5%; top: 16%; }
.enterprise-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3);
  margin-top: var(--space-12); list-style: none; padding: 0;
}
.enterprise-grid li {
  display: flex; align-items: center; gap: var(--space-3); padding: var(--space-4);
  border-top: 1px solid var(--color-border); font-size: 0.8125rem; color: var(--color-text-secondary);
}
.enterprise-grid li::before { content: "✓"; color: var(--color-cyan); font-weight: 700; flex-shrink: 0; }

.integration-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.integration-item { padding: var(--space-4); font-size: 0.875rem; font-weight: 500; text-align: center; background: var(--color-bg-light); border: 1px solid var(--color-border-light); border-radius: var(--radius-md); }
.section--dark .integration-item { background: rgba(255, 255, 255, 0.04); border-color: var(--color-border); color: var(--color-text-secondary); }
.enterprise-list { display: grid; gap: var(--space-3); margin-top: var(--space-8); list-style: none; padding: 0; }
.enterprise-list li { display: flex; align-items: center; gap: var(--space-3); font-size: 0.9375rem; }
.enterprise-list li::before { content: "✓"; color: var(--color-indigo); font-weight: 700; }
.section--dark .enterprise-list li::before { color: var(--color-cyan); }

.faq-layout { display: grid; gap: var(--space-12); align-items: start; }
.faq-intro { position: sticky; top: calc(var(--header-height) + var(--space-6)); }
.faq-list { display: flex; flex-direction: column; gap: 0; max-width: none; border-top: 1px solid var(--color-border-light); }
.section--dark .faq-list { border-color: var(--color-border); }
.faq-item { border: 0; border-bottom: 1px solid var(--color-border-light); border-radius: 0; overflow: visible; background: transparent; }
.section--dark .faq-item { border-color: var(--color-border); background: transparent; }
.faq-item__question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); min-height: 4.75rem; padding: var(--space-5) 0; font-size: 1rem; font-weight: 600; text-align: left; background: transparent; border: none; cursor: pointer; color: inherit; }
.faq-item__icon { flex-shrink: 0; width: 1.25rem; height: 1.25rem; position: relative; transition: transform var(--transition); }
.faq-item__icon::before, .faq-item__icon::after { content: ""; position: absolute; top: 50%; left: 50%; width: 0.875rem; height: 2px; background: currentColor; transform: translate(-50%, -50%); transition: transform var(--transition), opacity var(--transition); }
.faq-item__icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item__question[aria-expanded="true"] .faq-item__icon { transform: rotate(45deg); }
.faq-item__question[aria-expanded="true"] .faq-item__icon::after { opacity: 0; }
.faq-item__answer { display: none; padding: 0 0 var(--space-5); font-size: 0.9375rem; color: var(--color-text-muted); line-height: 1.7; }
.section--dark .faq-item__answer { color: var(--color-text-secondary); }
.faq-item__answer.is-open { display: block; }
.faq-item__answer p { margin: 0; }

.section--contact { background: #eceff3; }
.contact-shell {
  display: grid; overflow: hidden; border-radius: var(--radius-md);
  background: var(--color-bg-dark); color: var(--color-text-primary); box-shadow: var(--shadow-lg);
}
.contact-copy { display: flex; flex-direction: column; padding: var(--space-12); }
.contact-copy .section__title { font-size: clamp(2rem, 4vw, 3.25rem); }
.contact-copy .section__subtitle { color: var(--color-text-secondary); margin-bottom: 0; }
.contact-details { display: grid; gap: var(--space-3); margin-top: auto; padding-top: var(--space-10); }
.contact-details a, .contact-details span { display: flex; align-items: center; gap: var(--space-3); font-size: 0.875rem; color: #ccd1da; }
.contact-details a:hover { color: var(--color-cyan); }
.contact-details__icon { color: var(--color-cyan); flex-shrink: 0; }
.demo-form-panel { padding: var(--space-10); background: var(--color-bg-light); color: var(--color-text-dark); }
.demo-form-panel .form { padding: 0; border: 0; box-shadow: none; background: transparent; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
.form-grid .form__group { margin-bottom: 0; }
.form-footer { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); margin-top: var(--space-6); }
.form-note { font-size: 0.6875rem; line-height: 1.5; color: var(--color-text-muted); max-width: 16rem; }

.contact-grid { display: grid; gap: var(--space-12); }
.contact-info { display: flex; flex-direction: column; gap: var(--space-6); }
.contact-info__item { display: flex; align-items: flex-start; gap: var(--space-4); }
.contact-info__icon { width: 2.5rem; height: 2.5rem; display: grid; place-items: center; background: rgba(99, 102, 241, 0.12); border-radius: var(--radius-md); color: var(--color-indigo); flex-shrink: 0; }
.form { padding: var(--space-8); background: var(--color-bg-light); border: 1px solid var(--color-border-light); border-radius: var(--radius-xl); box-shadow: var(--shadow-md); }
.form__group { margin-bottom: var(--space-5); }
.form__label { display: block; margin-bottom: var(--space-2); font-size: 0.875rem; font-weight: 600; }
.form__required { color: var(--color-pink); }
.form__input, .form__select, .form__textarea { width: 100%; padding: 0.75rem 1rem; font-size: 0.9375rem; border: 1px solid var(--color-border-light); border-radius: var(--radius-md); background: var(--color-bg-light); transition: border-color var(--transition); }
.form__input:focus, .form__select:focus, .form__textarea:focus { border-color: var(--color-indigo); outline: none; box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15); }
.form__input.is-invalid, .form__select.is-invalid, .form__textarea.is-invalid { border-color: var(--color-pink); }
.form__error { display: none; margin-top: var(--space-2); font-size: 0.8125rem; color: var(--color-pink); }
.form__error.is-visible { display: block; }
.form__textarea { min-height: 6rem; resize: vertical; }
.form__status { display: none; margin-top: var(--space-4); padding: var(--space-4); border-radius: var(--radius-md); font-size: 0.9375rem; }
.form__status--success { display: block; background: rgba(52, 211, 153, 0.12); color: #059669; border: 1px solid rgba(52, 211, 153, 0.3); }
.form__status--error { display: block; background: rgba(244, 63, 94, 0.1); color: var(--color-pink); border: 1px solid rgba(244, 63, 94, 0.25); }
.form__spinner { display: inline-block; width: 1rem; height: 1rem; border: 2px solid rgba(255, 255, 255, 0.3); border-top-color: #fff; border-radius: 50%; animation: spin 0.6s linear infinite; vertical-align: middle; margin-right: 0.5rem; }
@keyframes spin { to { transform: rotate(360deg); } }

.site-footer { padding: var(--space-12) 0 var(--space-8); background: var(--color-bg-dark); color: var(--color-text-secondary); }
.site-footer__grid { display: grid; gap: var(--space-8); margin-bottom: var(--space-10); }
.site-footer__brand { max-width: 20rem; }
.site-footer__brand p { margin: var(--space-4) 0 0; font-size: 0.875rem; }
.site-footer__links { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.site-footer__col-title { margin: 0 0 var(--space-4); font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-primary); }
.site-footer__link { display: block; padding: var(--space-1) 0; font-size: 0.875rem; transition: color var(--transition); }
.site-footer__link:hover { color: var(--color-text-primary); }
.site-footer__bottom { padding-top: var(--space-8); border-top: 1px solid var(--color-border); font-size: 0.8125rem; text-align: center; }

.cta-banner { padding: var(--space-12); text-align: center; background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15), transparent), var(--color-bg-dark); color: var(--color-text-primary); border-radius: var(--radius-xl); border: 1px solid var(--color-border); }
.cta-banner__title { margin: 0 0 var(--space-4); font-size: clamp(1.5rem, 3vw, 2rem); }
.cta-banner__text { margin: 0 0 var(--space-8); color: var(--color-text-secondary); }
.cta-banner__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-4); }

@media (min-width: 768px) {
  .card-grid--2 { grid-template-columns: repeat(2, 1fr); }
  .card-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .integration-grid { grid-template-columns: repeat(4, 1fr); }
  .compare { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1.2fr; }
  .contact-shell { grid-template-columns: 0.72fr 1.28fr; }
  .form-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid .form__group--full { grid-column: 1 / -1; }
  .site-footer__grid { grid-template-columns: 1.5fr 1fr; }
  .usecase:nth-child(4), .usecase:nth-child(5) { grid-column: span 6; }
}

@media (min-width: 1024px) {
  .site-nav { display: flex; }
  .lang-switch { display: flex; }
  .menu-toggle { display: none; }
  .hero__grid { grid-template-columns: 1fr 1fr; }
  .card-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .card-grid--4 { grid-template-columns: repeat(4, 1fr); }
  .timeline { grid-template-columns: repeat(2, 1fr); }
  .integration-layout { grid-template-columns: 0.85fr 1.15fr; }
  .faq-layout { grid-template-columns: 0.7fr 1.3fr; }
  .enterprise-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 820px) {
  .usecase, .usecase:nth-child(4), .usecase:nth-child(5) { grid-column: span 6; }
  .usecase:nth-child(5) { grid-column: 1 / -1; }
  .integration-map { order: -1; min-height: 20rem; transform: scale(0.92); }
  .faq-intro { position: static; }
  .enterprise-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .usecase, .usecase:nth-child(4), .usecase:nth-child(5) { grid-column: 1 / -1; min-height: 20rem; }
  .enterprise-grid { grid-template-columns: 1fr; }
  .contact-copy, .demo-form-panel { padding: var(--space-8) var(--space-6); }
  .form-footer { flex-direction: column; align-items: stretch; }
}

@media (min-width: 1440px) { .container { width: min(100% - 4rem, var(--container-max)); } }

@media (max-width: 767px) {
  .site-header__actions .btn--primary { display: none; }
  .section { padding-block: var(--space-12); }
}