:root {
  --zs-color-primary: #1f4db6;
  --zs-color-primary-dark: #153985;
  --zs-color-accent: #00d4aa;
  --zs-color-text: #111111;
  --zs-color-muted: #667085;
  --zs-color-white: #ffffff;
  --zs-color-dark: #0f172a;
  --zs-color-line: rgba(17, 17, 17, 0.08);
  --zs-shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);
  --zs-radius-sm: 10px;
  --zs-radius-md: 16px;
  --zs-radius-lg: 24px;
  --zs-container: 1560px;
  --zs-header-height: 86px;
  --zs-topbar-height: 42px;
  --zs-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--zs-color-text);
  background: #ffffff;
  overflow-x: hidden;
  padding-top: calc(var(--zs-topbar-height) + var(--zs-header-height));
  transition: padding-top var(--zs-transition);
}

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

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

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

button {
  border: 0;
  background: none;
  cursor: pointer;
}

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

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

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

.zs-site {
  min-height: 100vh;
}

.zs-topbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 80;
  background: #0d1b2d;
  color: rgba(255, 255, 255, 0.82);
  transition: transform var(--zs-transition), opacity var(--zs-transition), visibility var(--zs-transition);
}

.zs-topbar-inner {
  min-height: var(--zs-topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.zs-topbar-list,
.zs-topbar-tools {
  display: flex;
  align-items: center;
  gap: 22px;
}

.zs-topbar-list li,
.zs-topbar-tools {
  font-size: 13px;
  line-height: 1.4;
}

.zs-topbar-list a,
.zs-topbar-static {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.zs-topbar-static {
  color: inherit;
}

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

.zs-topbar-icon svg,
.zs-social-link svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.zs-topbar-list a:hover,
.zs-social-link:hover {
  color: var(--zs-color-white);
}

.zs-topbar-tools {
  gap: 16px;
}

.zs-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: rgba(255, 255, 255, 0.88);
}

.zs-social-link:hover {
  transform: translateY(-1px);
}

.zs-header {
  position: fixed;
  top: var(--zs-topbar-height);
  left: 0;
  width: 100%;
  z-index: 70;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(17, 17, 17, 0.04);
  transition: top var(--zs-transition), box-shadow var(--zs-transition), background-color var(--zs-transition);
}

body.zs-scrolled .zs-header {
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

body.zs-topbar-hidden {
  padding-top: var(--zs-header-height);
}

body.zs-topbar-hidden .zs-topbar {
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
}

body.zs-topbar-hidden .zs-header {
  top: 0;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.1);
}

.zs-header-inner {
  min-height: var(--zs-header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.zs-logo a {
  display: inline-flex;
  align-items: center;
}

.zs-logo img {
  width: auto;
  height: 60px;
  object-fit: contain;
}

.zs-nav {
  flex: 1 1 auto;
}

.zs-nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
}

.zs-nav-item {
  position: relative;
}

.zs-nav-list a,
.zs-nav-parent {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: var(--zs-header-height);
  font-size: 16px;
  font-weight: 600;
  color: #344054;
}

.zs-nav-parent {
  padding: 0;
  color: #344054;
}

.zs-nav-list a::after,
.zs-nav-parent::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 20px;
  width: 0;
  height: 3px;
  border-radius: 999px;
  background: var(--zs-color-primary);
  transition: width var(--zs-transition), left var(--zs-transition);
}

.zs-nav-caret {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform var(--zs-transition);
}

.zs-nav-list a:hover,
.zs-nav-list a.is-active,
.zs-nav-parent:hover,
.zs-has-submenu.is-open .zs-nav-parent {
  color: var(--zs-color-primary);
}

.zs-nav-list a:hover::after,
.zs-nav-list a.is-active::after,
.zs-nav-parent:hover::after,
.zs-has-submenu.is-open .zs-nav-parent::after {
  left: 0;
  width: 100%;
}

.zs-has-submenu:hover .zs-nav-caret,
.zs-has-submenu.is-open .zs-nav-caret {
  transform: rotate(225deg) translateY(-1px);
}

.zs-submenu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  min-width: 250px;
  padding: 14px 0;
  border: 1px solid rgba(17, 17, 17, 0.06);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(12px);
  transition: opacity var(--zs-transition), transform var(--zs-transition), visibility var(--zs-transition);
  z-index: 30;
}

.zs-submenu li + li {
  border-top: 1px solid rgba(17, 17, 17, 0.05);
}

.zs-submenu a {
  display: flex;
  min-height: auto;
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 500;
  color: #475467;
}

.zs-submenu a::after {
  display: none;
}

.zs-submenu a:hover {
  color: var(--zs-color-primary);
  background: #f5f8ff;
}

.zs-has-submenu:hover .zs-submenu,
.zs-has-submenu:focus-within .zs-submenu,
.zs-has-submenu.is-open .zs-submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.zs-header-action {
  flex: 0 0 auto;
}

.zs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 146px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
}

.zs-btn-primary {
  color: var(--zs-color-white);
  background: linear-gradient(135deg, var(--zs-color-primary-dark), var(--zs-color-primary));
  box-shadow: 0 15px 30px rgba(31, 77, 182, 0.28);
}

.zs-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(31, 77, 182, 0.36);
}

.zs-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  background: #edf2ff;
}

.zs-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--zs-color-primary-dark);
  transition: transform var(--zs-transition), opacity var(--zs-transition);
}

.zs-menu-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.zs-menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.zs-menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.zs-footer {
  color: rgba(255, 255, 255, 0.78);
  background:
    linear-gradient(90deg, rgba(17, 31, 45, 0.98) 0%, rgba(8, 18, 30, 0.98) 100%);
}

.zs-floating-contact {
  position: fixed;
  top: 50%;
  right: 24px;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transform: translateY(-50%);
}

.zs-floating-contact__item {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  color: #ffffff;
  background: linear-gradient(135deg, #13386c 0%, #0d2647 100%);
  box-shadow: 0 12px 30px rgba(7, 20, 37, 0.28);
  transition: transform var(--zs-transition), background var(--zs-transition), box-shadow var(--zs-transition);
}

.zs-floating-contact__item:hover {
  color: #ffffff;
  background: linear-gradient(135deg, #1c4f97 0%, #13386c 100%);
  transform: translateX(-4px);
  box-shadow: 0 16px 36px rgba(7, 20, 37, 0.34);
}

.zs-floating-contact__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
}

.zs-floating-contact__icon svg {
  width: 100%;
  height: 100%;
}

.zs-floating-contact__label {
  position: absolute;
  top: 50%;
  right: calc(100% + 12px);
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: #ffffff;
  background: rgba(10, 26, 48, 0.94);
  box-shadow: 0 12px 28px rgba(7, 20, 37, 0.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%) translateX(8px);
  transition: opacity var(--zs-transition), transform var(--zs-transition), visibility var(--zs-transition);
  pointer-events: none;
}

.zs-floating-contact__item:hover .zs-floating-contact__label,
.zs-floating-contact__item:focus-visible .zs-floating-contact__label {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.zs-footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.zs-footer-logo {
  display: inline-flex;
  align-items: center;
}

.zs-footer-logo img {
  width: auto;
  height: 44px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.zs-footer-social {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
}

.zs-footer-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.zs-footer-social-link:hover {
  color: rgba(255, 255, 255, 0.82);
  transform: translateY(-1px);
}

.zs-footer-social-link svg {
  width: 19px;
  height: 19px;
}

.zs-footer-main {
  display: grid;
  grid-template-columns: minmax(280px, 1.7fr) repeat(4, minmax(140px, 1fr));
  gap: 48px;
  padding: 36px 0 28px;
}

.zs-footer-col h2 {
  margin-bottom: 14px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  color: #ffffff;
}

.zs-footer-col ul {
  display: grid;
  gap: 9px;
}

.zs-footer-col li,
.zs-footer-col a {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.72);
}

.zs-footer-col a:hover {
  color: #ffffff;
}

.zs-footer-contact li span {
  color: rgba(255, 255, 255, 0.9);
}

.zs-footer-bottom {
  background: rgba(255, 255, 255, 0.05);
}

.zs-footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 58px;
}

.zs-footer-bottom p {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.48);
}

.zs-footer-links-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 122px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.zs-footer-links-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

@media (max-width: 1199px) {
  .zs-nav-list {
    gap: 22px;
  }

  .zs-nav-list a,
  .zs-nav-parent {
    font-size: 15px;
  }

  .zs-submenu {
    min-width: 220px;
  }
}

@media (max-width: 991px) {
  body {
    padding-top: 78px;
  }

  .zs-topbar {
    display: none;
  }

  .zs-header {
    top: 0;
  }

  .zs-header-inner {
    min-height: 78px;
  }

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

  .zs-nav {
    position: fixed;
    top: 78px;
    left: 0;
    right: 0;
    width: 100%;
    height: calc(100vh - 78px);
    padding: 28px 24px 40px;
    background: rgba(255, 255, 255, 0.98);
    overflow-y: auto;
    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;
    justify-content: flex-start;
    gap: 6px;
  }

  .zs-nav-item {
    width: 100%;
  }

  .zs-nav-list a,
  .zs-nav-parent {
    min-height: auto;
    padding: 12px 0;
  }

  .zs-nav-parent {
    width: 100%;
    justify-content: space-between;
  }

  .zs-nav-list a::after,
  .zs-nav-parent::after {
    bottom: 4px;
  }

  .zs-submenu {
    position: static;
    min-width: 100%;
    margin-top: 4px;
    padding: 0 0 0 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }

  .zs-submenu li + li {
    border-top: 0;
  }

  .zs-submenu a {
    padding: 10px 0;
    font-size: 14px;
    color: #667085;
  }

  .zs-has-submenu.is-open .zs-submenu {
    display: block;
    transform: none;
  }

  .zs-has-submenu:hover .zs-submenu,
  .zs-has-submenu:focus-within .zs-submenu {
    transform: none;
  }

  .zs-header-action {
    margin-left: auto;
  }

  .zs-footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .zs-floating-contact {
    right: 16px;
    gap: 8px;
  }

  .zs-floating-contact__item {
    width: 46px;
    height: 46px;
  }
}

@media (max-width: 767px) {
  .zs-container {
    width: min(100% - 24px, var(--zs-container));
  }

  .zs-logo img {
    height: 50px;
  }

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

  .zs-footer-top {
    padding: 24px 0 20px;
  }

  .zs-footer-logo img {
    height: 36px;
  }

  .zs-footer-main {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 28px 0 24px;
  }

  .zs-footer-col h2 {
    font-size: 18px;
  }

  .zs-footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 14px 0;
  }

  .zs-floating-contact {
    display: none;
  }
}