:root {
  --cw-rpx: clamp(0.667px, calc(0.034688vw + 0.334px), 1px);
  --cw-logo-rpx: clamp(0.75px, calc(0.026042vw + 0.5px), 1px);
  --cw-fpx: clamp(0.875px, calc(0.013021vw + 0.75px), 1px);
  --cw-shell-width: clamp(900px, calc(56.25vw + 360px), 1440px);
  --cw-header-height: calc(120 * var(--cw-rpx));
}

chengwu-header,
chengwu-footer {
  display: block;
  color: #fff;
  font-family: "Tianne Sans", "Chengwu Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

chengwu-header[flow] { height: var(--cw-header-height); }
body.cw-menu-open { overflow: hidden; }

.cw-header,
.cw-header *,
.cw-footer,
.cw-footer * { box-sizing: border-box; }

.cw-header a,
.cw-footer a { color: inherit; text-decoration: none; }
.cw-header button,
.cw-footer button { color: inherit; font: inherit; }

.cw-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--cw-header-height);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(8, 9, 20, 0.03);
  backdrop-filter: blur(15px);
  transition: background-color 220ms ease, border-color 220ms ease;
}

.cw-header.is-scrolled {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(var(--site-background-rgb), 0.9);
}

.cw-shell,
.cw-header-shell {
  width: var(--cw-shell-width);
  margin-inline: auto;
}

.cw-header-shell {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cw-logo {
  display: block;
  flex: 0 0 auto;
  height: calc(60 * var(--cw-logo-rpx));
  transition: transform 350ms cubic-bezier(0.22, 1, 0.36, 1);
}

.cw-logo img { display: block; width: auto; height: 100%; }

.cw-desktop-navigation {
  height: 100%;
  padding-top: calc(8 * var(--cw-rpx));
  display: grid;
  grid-template-rows: calc(38 * var(--cw-rpx)) 1fr;
  justify-items: end;
  align-items: center;
}

.cw-utility-nav,
.cw-primary-nav { display: flex; align-items: center; }

.cw-utility-nav {
  justify-self: end;
  gap: calc(40 * var(--cw-rpx));
  color: rgba(255, 255, 255, 0.72);
  font-size: calc(14 * var(--cw-fpx));
  line-height: 1;
}

.cw-utility-nav > a,
.cw-nav-trigger { opacity: 0.94; }

.cw-utility-nav .is-current { color: #fff; }

.cw-primary-nav { height: 100%; }

.cw-header .cw-primary-link {
  position: relative;
  height: 100%;
  padding: 0 calc(23 * var(--cw-rpx));
  border: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  color: rgba(255, 255, 255, 0.94);
  background: transparent;
  cursor: pointer;
  font-size: calc(16 * var(--cw-fpx));
  white-space: nowrap;
}

.cw-primary-link::before {
  position: absolute;
  right: 13%;
  bottom: 0;
  left: 13%;
  height: 1px;
  content: "";
  opacity: 0;
  background: linear-gradient(90deg, transparent, #728dff, transparent);
  transform: scaleX(0.55);
  transition: opacity 180ms ease, transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.cw-primary-link.is-active::before,
.cw-primary-link:hover::before,
.cw-nav-item:focus-within > .cw-primary-link::before { opacity: 1; transform: scaleX(1); }

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

.cw-nav-trigger {
  padding: 0;
  border: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  color: inherit;
  background: transparent;
  cursor: pointer;
}

.cw-chevron {
  width: 0.52em;
  height: 0.52em;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-0.15em) rotate(45deg);
  transition: transform 180ms cubic-bezier(0.22, 1, 0.36, 1);
}

.cw-nav-item:hover > .cw-nav-trigger .cw-chevron,
.cw-nav-item:focus-within > .cw-nav-trigger .cw-chevron { transform: translateY(0.15em) rotate(225deg); }

.cw-language-trigger svg { width: 1.2em; height: 1.2em; fill: none; stroke: currentColor; stroke-width: 1.5; }

.cw-popover {
  position: absolute;
  top: calc(100% + 12 * var(--cw-rpx));
  left: 50%;
  z-index: 20;
  min-width: calc(190 * var(--cw-rpx));
  padding: calc(14 * var(--cw-rpx)) calc(20 * var(--cw-rpx));
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: calc(15 * var(--cw-rpx));
  display: grid;
  opacity: 0;
  visibility: hidden;
  background: rgba(var(--site-background-rgb), 0.96);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.36);
  transform: translate(-50%, -8px) scale(0.9);
  transform-origin: top center;
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1), opacity 150ms ease, visibility 150ms;
  pointer-events: none;
}

.cw-popover::before { position: absolute; right: 0; bottom: 100%; left: 0; height: calc(16 * var(--cw-rpx)); content: ""; }
.cw-popover a { padding: 0.65em 0; color: rgba(255, 255, 255, 0.72); white-space: nowrap; }
.cw-popover a:hover { color: #fff; }
.cw-popover--compact { min-width: calc(150 * var(--cw-rpx)); }
.cw-popover--platform { min-width: calc(250 * var(--cw-rpx)); }
.cw-popover--language { min-width: 7.5em; grid-template-columns: 1fr 1fr; gap: 1em; }
.cw-popover--language a.is-current { color: #fff; text-decoration: underline; text-underline-offset: 0.25em; }

.cw-nav-item:hover > .cw-popover,
.cw-nav-item:focus-within > .cw-popover { opacity: 1; visibility: visible; transform: translate(-50%, 0) scale(1); pointer-events: auto; }

.cw-menu-toggle,
.cw-mobile-menu { display: none; }

.cw-footer {
  position: relative;
  z-index: 30;
  padding-top: 150px;
  overflow: hidden;
  background: var(--site-background);
}

.cw-footer-wave { position: absolute; inset: 0 0 auto; height: 118px; overflow: hidden; }
.cw-footer-wave img { position: absolute; top: clamp(-82px, -5.7vw, -68px); left: 50%; width: max(100%, 1200px); max-width: none; height: auto; filter: saturate(1.08) brightness(1.04); transform: translateX(-50%); }

.cw-back-to-top {
  position: absolute;
  top: 20px;
  left: 50%;
  z-index: 50;
  /* 素材四周包含大面积透明像素，限制按钮盒尺寸，避免透明区域覆盖页脚链接。 */
  width: calc(180 * var(--cw-rpx));
  height: calc(180 * var(--cw-rpx));
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  transform: translateX(-50%);
  transition: filter 0.4s ease, transform 0.4s ease;
}

.cw-back-to-top img { height: 90%; }

.cw-footer-main {
  position: relative;
  z-index: 4;
  padding: 54px 0 42px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.cw-footer-logo { display: block; width: 190px; height: auto; }

.cw-footer-nav {
  flex: 0 0 clamp(640px, calc(39.5833vw + 260px), 1020px);
  display: flex;
  justify-content: space-between;
  gap: calc(40 * var(--cw-rpx));
}

.cw-footer-nav div { display: flex; flex-direction: column; }
.cw-footer-nav strong { margin-bottom: calc(12 * var(--cw-rpx)); color: rgba(255, 255, 255, 0.62); font-size: calc(14 * var(--cw-rpx)); font-weight: 400; }
.cw-footer-nav a { padding-block: 0.1875em; color: #fff; font-size: calc(16 * var(--cw-rpx)); line-height: 1.5; }
.cw-footer-nav a:hover { color: #9ba8ff; }

.cw-footer-legal { border-top: 1px solid rgba(255, 255, 255, 0.25); }
.cw-footer-legal .cw-shell { min-height: calc(120 * var(--cw-rpx)); display: flex; align-items: center; justify-content: space-between; gap: 2rem; color: rgba(255, 255, 255, 0.44); font-size: 0.72rem; }
.cw-footer-legal a:last-child { margin-left: auto; }

@media (hover: hover) and (pointer: fine) {
  .cw-logo:hover { transform: scale(1.06); }
  .cw-back-to-top:hover { filter: brightness(1.1); transform: translateX(-50%) scale(1.05); }
}

@media (max-width: 828px) {
  :root { --cw-header-height: clamp(62px, 12.1vw, 82px); --cw-shell-width: calc(100% - 48px); }
  .cw-header { background: rgba(var(--site-background-rgb), 0.88); }
  .cw-desktop-navigation { display: none; }
  .cw-logo { height: clamp(38px, 9.66vw, 52px); }

  .cw-menu-toggle {
    position: relative;
    width: 42px;
    height: 42px;
    padding: 9px 6px;
    border: 0;
    display: grid;
    align-content: center;
    gap: 6px;
    background: transparent;
    cursor: pointer;
  }

  .cw-menu-toggle span { width: 100%; height: 1.5px; background: #fff; transition: transform 240ms cubic-bezier(0.22, 1, 0.36, 1), opacity 140ms ease; }
  .cw-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .cw-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .cw-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

  .cw-mobile-menu {
    position: fixed;
    inset: var(--cw-header-height) 0 0;
    z-index: 999;
    padding: 5vh 9vw;
    display: flex;
    flex-direction: column;
    gap: clamp(1rem, 2.4vh, 1.4rem);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    background: rgba(var(--site-background-rgb), 0.98);
    backdrop-filter: blur(22px);
    transform: translateY(-18px);
    transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), opacity 180ms ease, visibility 0s linear 260ms;
    pointer-events: none;
  }

  .cw-mobile-menu.is-open { opacity: 1; visibility: visible; transform: translateY(0); transition-delay: 0s; pointer-events: auto; }
  .cw-mobile-menu > a { font-size: clamp(22px, 6vw, 34px); font-weight: 600; }
  .cw-mobile-menu__meta { margin-top: auto; display: flex; flex-wrap: wrap; gap: 20px; }

  .cw-footer { padding-top: 130px; }
  .cw-back-to-top { top: 14px; width: 150px; height: 150px; }
  .cw-footer-main { padding: 45px 0 40px; display: grid; gap: 3rem; }
  .cw-footer-logo { width: 11.5rem; }
  .cw-footer-nav { width: 100%; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
  .cw-footer-legal .cw-shell { min-height: 10rem; padding-block: 1.5rem; flex-wrap: wrap; align-content: center; gap: 0.7rem 1.5rem; }
  .cw-footer-legal a:last-child { width: 100%; margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cw-header *,
  .cw-footer * { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}