:root {
  --zs-primary: #0e418f;
  --zs-primary-strong: #123f88;
  --zs-primary-bright: #0066ff;
  --zs-secondary: #00d4aa;
  --zs-text: #111111;
  --zs-text-soft: #666666;
  --zs-bg-soft: #f5f7fa;
  --zs-white: #ffffff;
  --zs-border: rgba(17, 17, 17, 0.08);
  --zs-shadow: 0 20px 60px rgba(11, 57, 128, 0.14);
  --zs-radius: 18px;
  --zs-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--zs-text);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--zs-white);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--zs-transition), background-color var(--zs-transition), border-color var(--zs-transition), transform var(--zs-transition), box-shadow var(--zs-transition);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

.zs-container {
  width: min(100% - 48px, 1360px);
  margin: 0 auto;
}

.zs-section {
  padding: 100px 0;
}

.zs-section-heading {
  max-width: 720px;
  margin-bottom: 40px;
}

.zs-section-heading__tag {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(0, 102, 255, 0.08);
  color: var(--zs-primary-bright);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.zs-section-heading h2 {
  margin-bottom: 16px;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.15;
}

.zs-section-heading p {
  color: var(--zs-text-soft);
  font-size: 17px;
  line-height: 1.8;
}

.zs-section-heading--light h2,
.zs-section-heading--light p {
  color: var(--zs-white);
}

.zs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.zs-btn:hover {
  transform: translateY(-2px);
}

.zs-btn--primary {
  color: var(--zs-white);
  background: linear-gradient(135deg, var(--zs-primary-bright), var(--zs-primary));
  box-shadow: 0 12px 30px rgba(0, 102, 255, 0.24);
}

.zs-btn--primary:hover {
  background: linear-gradient(135deg, var(--zs-secondary), var(--zs-primary-bright));
}

.zs-btn--light {
  background: var(--zs-white);
  color: var(--zs-primary);
  box-shadow: 0 12px 30px rgba(255, 255, 255, 0.25);
}

.zs-btn--ghost {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--zs-white);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(6px);
}

.zs-btn--small {
  min-height: 40px;
  padding: 10px 18px;
  font-size: 14px;
}

.zs-btn--block {
  width: 100%;
}

.zs-site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  width: 100%;
}

.zs-topbar {
  max-height: 34px;
  overflow: hidden;
  background: var(--zs-primary);
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  opacity: 1;
  transition: max-height var(--zs-transition), opacity var(--zs-transition), transform var(--zs-transition);
}

.zs-topbar__list {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 34px;
  transition: min-height var(--zs-transition);
}

.zs-topbar__list a:hover {
  color: var(--zs-white);
}

.zs-navbar {
  position: relative;
  background: rgba(0, 0, 0, 0.42);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background-color var(--zs-transition), box-shadow var(--zs-transition);
  backdrop-filter: blur(10px);
}

.zs-site-header.is-scrolled .zs-navbar {
  background: rgba(0, 0, 0, 0.58);
  box-shadow: 0 16px 36px rgba(17, 17, 17, 0.18);
}

.zs-site-header.is-scrolled .zs-topbar {
  max-height: 0;
  opacity: 0;
  transform: translateY(-100%);
}

.zs-site-header.is-scrolled .zs-topbar__list {
  min-height: 0;
}

.zs-navbar__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 82px;
}

.zs-logo {
  font-size: 0;
}

.zs-logo a,
.zs-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.zs-logo__image {
  display: block;
  width: auto;
  height: 62px;
}

.zs-seo-heading {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.zs-footer__logo .zs-logo__image {
  height: 54px;
}

.zs-logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff9c2a, #f07b18);
  color: var(--zs-white);
  font-size: 17px;
  font-weight: 800;
}

.zs-logo__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.zs-logo__text strong {
  color: var(--zs-white);
  font-size: 18px;
  line-height: 1;
}

.zs-logo__text em {
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
  font-style: normal;
}

.zs-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.zs-nav__item {
  position: relative;
}

.zs-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 14px;
  font-weight: 500;
}

.zs-nav__link::after {
  display: none;
}

.zs-nav__link:hover,
.zs-nav__item:hover > .zs-nav__link,
.zs-nav__item:focus-within > .zs-nav__link {
  background: #0b3e87;
  color: var(--zs-white);
}

.zs-nav__link.is-active,
.zs-nav__item.is-active > .zs-nav__link,
.zs-nav__item.is-active > .zs-nav__link--trigger {
  background: #0b3e87;
  color: var(--zs-white);
}

.zs-nav__item--has-mega {
  position: static;
}

.zs-nav__item--has-dropdown {
  position: static;
}

.zs-nav__link--trigger {
  padding: 0 18px;
}

.zs-nav__item:hover > .zs-nav__link--trigger,
.zs-nav__item:focus-within > .zs-nav__link--trigger {
  background: #0b3e87;
}

.zs-nav__link--trigger::after {
  display: none;
}

.zs-mega-menu {
  position: absolute;
  left: 0;
  top: calc(100% - 1px);
  z-index: 20;
  width: 100%;
  min-height: 400px;
  background: rgba(15, 58, 124, 0.96);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.22);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.zs-mega-menu__inner {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  width: min(100% - 48px, 1360px);
  min-height: 400px;
  margin: 0 auto;
  padding: 0;
}

.zs-nav__item--has-mega:hover .zs-mega-menu,
.zs-nav__item--has-mega:focus-within .zs-mega-menu,
.zs-nav__item--has-mega.is-open .zs-mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.zs-nav__item--has-mega.is-open > .zs-nav__link--trigger {
  background: #0b3e87;
}

.zs-nav__item--has-dropdown.is-open > .zs-nav__link--trigger {
  background: #0b3e87;
}

.zs-mega-menu__tabs {
  display: grid;
  align-content: start;
  padding: 34px 0;
  background: rgba(205, 227, 246, 0.96);
}

.zs-mega-menu__tab {
  width: 100%;
  padding: 12px 24px;
  border: 0;
  background: transparent;
  color: #18427d;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  text-align: left;
}

.zs-mega-menu__tab:hover,
.zs-mega-menu__tab.is-active {
  background: #0b3e87;
  color: var(--zs-white);
}

.zs-mega-menu__panels {
  padding: 34px 42px;
}

.zs-mega-menu__panel ul {
  display: grid;
  gap: 14px;
}

.zs-mega-menu__panel a {
  color: rgba(255, 255, 255, 0.94);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
}

.zs-mega-menu__panel a:hover {
  color: #d8e9ff;
}

.zs-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 20;
  min-width: 140px;
  background: rgba(205, 227, 246, 0.96);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.18);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.zs-dropdown-menu__inner {
  display: grid;
  padding: 12px 0;
}

.zs-dropdown-menu__inner a {
  display: block;
  padding: 10px 18px;
  color: #18427d;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.35;
}

.zs-dropdown-menu__inner a:hover {
  background: #0b3e87;
  color: var(--zs-white);
}

.zs-nav__item--has-dropdown:hover .zs-dropdown-menu,
.zs-nav__item--has-dropdown:focus-within .zs-dropdown-menu,
.zs-nav__item--has-dropdown.is-open .zs-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.zs-header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.zs-search {
  position: relative;
  display: flex;
  align-items: center;
}

.zs-search input {
  width: 176px;
  height: 38px;
  padding: 0 42px 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--zs-text);
  outline: none;
}

.zs-search input:focus,
.zs-lang-switch select:focus,
.zs-form input:focus,
.zs-form select:focus,
.zs-form textarea:focus {
  border-color: rgba(0, 102, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

.zs-search__icon {
  position: absolute;
  top: 50%;
  right: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  transform: translateY(-50%);
  transform: translateY(-50%);
}
.zs-search__icon svg {
  width: 16px;
  height: 16px;
  fill: #050505;
  transform-origin: center;
}
.zs-lang-switch select {
  height: 38px;
  padding: 0 36px 0 14px;
  border: 1px solid rgba(14, 65, 143, 0.12);
  border-radius: 999px;
  background: #fafbff;
  color: #2f3d57;
  outline: none;
  appearance: none;
}

.zs-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
}

.zs-menu-toggle span {
  width: 24px;
  height: 2px;
  margin: 0 auto;
  background: var(--zs-white);
  border-radius: 999px;
}

.zs-site-footer {
  padding: 76px 0 0;
  color: rgba(255, 255, 255, 0.82);
  background: url("../img/pharmaceutical-chemicals-footer.jpg") center / cover no-repeat;
}

.zs-site-footer__inner {
  padding-bottom: 0;
}

.zs-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 44px;
  padding-bottom: 56px;
}

.zs-footer__nav h2,
.zs-footer__contact h2 {
  margin-bottom: 22px;
  color: var(--zs-white);
  font-size: 20px;
  font-weight: 700;
}

.zs-footer__nav h2::after,
.zs-footer__contact h2::after {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-top: 12px;
  background: rgba(255, 255, 255, 0.82);
}

.zs-footer__nav ul,
.zs-footer__contact ul {
  display: grid;
  gap: 11px;
}

.zs-footer__nav li {
  display: flex;
  align-items: center;
}

.zs-footer__nav li::before {
  content: "•";
  margin-right: 10px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 16px;
}

.zs-footer__nav a,
.zs-footer__contact a {
  color: rgba(255, 255, 255, 0.76);
  font-size: 15px;
  line-height: 1.7;
}

.zs-footer__nav a:hover,
.zs-footer__contact a:hover,
.zs-footer__social a:hover {
  color: var(--zs-white);
}

.zs-footer__contact li {
  display: grid;
  grid-template-columns: 16px 1fr;
  align-items: start;
  gap: 10px;
}

.zs-footer__contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.88);
}

.zs-footer__contact-icon svg {
  width: 14px;
  height: 14px;
  display: block;
}

.zs-footer__contact strong {
  display: block;
  margin-bottom: 3px;
  color: var(--zs-white);
  font-size: 15px;
  font-weight: 700;
}

.zs-footer__bottom {
  width: 100%;
  background: rgba(0, 30, 76, 0.82);
  font-size: 14px;
}

.zs-footer__bottom .zs-container {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 26px;
  min-height: 56px;
}

.zs-footer__legal {
  display: flex;
  align-items: center;
  gap: 18px;
  color: rgba(255, 255, 255, 0.74);
}

.zs-footer__legal a + a {
  position: relative;
  padding-left: 18px;
}

.zs-footer__legal a + a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1px;
  height: 12px;
  background: rgba(255, 255, 255, 0.28);
  transform: translateY(-50%);
}

.zs-footer__social {
  display: flex;
  align-items: center;
  gap: 14px;
}

.zs-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.82);
  width: 16px;
  height: 16px;
}

.zs-footer__social a svg {
  width: 16px;
  height: 16px;
  display: block;
}

.zs-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.zs-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1199px) {
  .zs-site-header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 999 !important;
  }

  .zs-navbar__inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .zs-site-footer {
    padding-top: 0;
  }

  .zs-site-footer__inner {
    padding-bottom: 0;
  }

  .zs-footer__grid {
    grid-template-columns: 1fr;
    gap: 0;
    padding-bottom: 32px;
    padding-top: 30px;
  }

  .zs-footer__nav {
    display: none;
  }

  .zs-footer__contact {
    display: block;
  }

  .zs-nav {
    position: fixed;
    top: 116px;
    right: 0;
    width: min(86vw, 360px);
    height: calc(100vh - 116px);
    padding: 32px 24px;
    background: rgba(9, 25, 52, 0.98);
    transform: translateX(100%);
    transition: transform var(--zs-transition);
  }

  .zs-nav.is-open {
    transform: translateX(0);
  }

  .zs-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }

  .zs-nav__link {
    padding: 0;
    border-radius: 0;
    color: rgba(255, 255, 255, 0.9);
  }

  .zs-nav__link:hover,
  .zs-nav__item:hover > .zs-nav__link,
  .zs-nav__item:focus-within > .zs-nav__link {
    background: none;
  }

  .zs-nav__link.is-active,
  .zs-nav__item.is-active > .zs-nav__link,
  .zs-nav__item.is-active > .zs-nav__link--trigger {
    background: none;
    color: #8ec4ff;
    font-weight: 700;
  }

  .zs-nav__item,
  .zs-nav__item--has-mega {
    width: 100%;
    position: relative;
  }

  .zs-nav__item--has-dropdown {
    width: 100%;
  }

  .zs-nav__link--trigger {
    width: 100%;
    padding: 0;
    border-radius: 0;
    justify-content: space-between;
  }

  .zs-nav__item:hover > .zs-nav__link--trigger,
  .zs-nav__item:focus-within > .zs-nav__link--trigger {
    background: none;
  }

  .zs-nav__link--trigger::after {
    content: "";
    display: block;
    width: 8px;
    height: 8px;
    margin-left: 12px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
    transition: transform 0.22s ease;
  }

  .zs-nav__item--has-mega.is-open > .zs-nav__link--trigger::after,
  .zs-nav__item--has-dropdown.is-open > .zs-nav__link--trigger::after {
    transform: rotate(-135deg);
  }

  .zs-mega-menu {
    position: static;
    width: 100%;
    min-height: 0;
    margin-top: 14px;
    background: rgba(255, 255, 255, 0.04);
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    display: none;
  }

  .zs-mega-menu__inner {
    grid-template-columns: 1fr;
    width: 100%;
    min-height: 0;
  }

  .zs-mega-menu__tabs,
  .zs-mega-menu__panels,
  .zs-dropdown-menu__inner {
    width: 100%;
  }

  .zs-mega-menu__tabs {
    padding: 8px 0;
    background: rgba(255, 255, 255, 0.06);
  }

  .zs-mega-menu__tab {
    padding: 11px 16px;
    color: rgba(255, 255, 255, 0.86);
    font-size: 14px;
    font-weight: 600;
  }

  .zs-mega-menu__tab:hover,
  .zs-mega-menu__tab.is-active {
    background: rgba(14, 65, 143, 0.92);
    color: var(--zs-white);
  }

  .zs-mega-menu__panels {
    display: none;
  }

  .zs-nav__item--has-mega.is-open .zs-mega-menu {
    display: grid;
  }

  .zs-dropdown-menu {
    position: static;
    min-width: 0;
    width: 100%;
    margin-top: 14px;
    background: rgba(255, 255, 255, 0.04);
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    display: none;
  }

  .zs-nav__item--has-dropdown.is-open .zs-dropdown-menu {
    display: block;
  }

  .zs-dropdown-menu__inner {
    padding: 12px 0;
  }

  .zs-dropdown-menu__inner a {
    padding: 10px 16px;
    color: rgba(255, 255, 255, 0.86);
    font-size: 14px;
  }

  .zs-dropdown-menu__inner a:hover {
    background: rgba(14, 65, 143, 0.92);
  }

  .zs-header-tools {
    display: none;
  }

  .zs-menu-toggle {
    display: inline-flex;
  }
}

@media (max-width: 991px) {
  .zs-section {
    padding: 80px 0;
  }

  .zs-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .zs-footer__bottom {
    padding: 0;
  }

  .zs-footer__bottom .zs-container {
    grid-template-columns: 1fr;
    justify-items: start;
    gap: 14px;
    padding: 14px 0;
  }
}

@media (max-width: 767px) {
  .zs-container {
    width: min(100% - 32px, 1360px);
  }

  .zs-topbar {
    display: none;
  }

  .zs-nav {
    top: 82px;
    height: calc(100vh - 82px);
  }

  .zs-navbar__inner {
    min-height: 82px;
  }

  .zs-section-heading {
    margin-bottom: 32px;
  }

  .zs-section-heading p {
    font-size: 16px;
  }

  .zs-footer__bottom .zs-container {
    grid-template-columns: 1fr;
    display: grid;
  }

  .zs-footer__grid {
    grid-template-columns: 1fr;
  }

  .zs-footer__bottom {
    padding: 0;
  }
}