/* ========================================================
   HEIE COMMON STYLES
   公共样式：基础重置、变量、页头、页尾、按钮、滚动返回、通用布局
   ======================================================== */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@500;600;700&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  --c-bg:     #0F2818;
  --c-bg-2:   #0C2508;
  --c-bg-3:   #143524;
  --c-green:  #71BE6E;
  --c-green-d:#5BA458;
  --c-green-soft: rgba(113,190,110,.55);
  --c-gray:   #AAAAAA;
  --c-line:   rgba(113,190,110,.35);
  --c-ink:    #ffffff;

  --radius-pill: 999px;
  --container: 1300px;
  --gutter: 32px;

  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: var(--font-cn);
}

/* 全局重置 */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-ink);
  line-height: 1.55;
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; cursor: pointer; color: inherit; }
ul { list-style: none; }
sup { font-size: .42em; vertical-align: super; font-weight: 500; opacity: .9; margin-left: 2px; }

/* 通用容器 */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ========================================================
   公共按钮样式
   ======================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .2s, background .2s, color .2s, box-shadow .2s;
  white-space: nowrap;
  font-family: var(--font-en);
}
.btn-pill { padding: 12px 30px; border-radius: var(--radius-pill); font-size: 15px; }
.btn-green { background: var(--c-green); color: #fff; }
.btn-green:hover { background: var(--c-green-d); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--c-bg); padding: 13px 38px; font-size: 16px; }
.btn-white:hover { background: #f2f2ee; transform: translateY(-2px); box-shadow: 0 10px 22px rgba(0,0,0,.3); }

/* ========================================================
   页头 HEADER (全站公共)
   ======================================================== */
.site-header {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 30;
}
.site-header.fixed {
  position: fixed;
  background: rgba(15, 40, 24, .92);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 18px rgba(0,0,0,.4);
  animation: slideDown .35s ease;
}
.site-header.fixed .header-top   {padding: 15px 0;}
.site-header.fixed .header-main  {padding: 10px 0;}
@keyframes slideDown {
  from { transform: translateY(-100%); }
  to   { transform: translateY(0); }
}

/* 顶部语言栏 */
.header-top {
  padding: 15px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-top-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

/* 主导航栏 */
.header-main {
  padding: 10px 0;
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 32px;
}
.brand-logo {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}
.brand-logo img {
  height: 55px;
  width: auto;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,.25));
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  justify-content: flex-end;
}
.main-nav .nav-item {
  position: relative;
}
.main-nav .nav-item > a {
  position: relative;
  display: inline-block;
  font-size: 16px;
  font-weight: 500;
  color: #fff;
  padding: 6px 2px;
  transition: color .2s;
  white-space: nowrap;
}
.main-nav .nav-item > a:hover { color: var(--c-green); }
.main-nav .nav-item.active > a,
.main-nav .nav-item > a.active { color: #fff; font-weight: 700; }
.main-nav .nav-item > a::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%) scaleX(0);
  width: 70%;
  height: 2px;
  background: var(--c-green);
  transition: transform .25s ease;
}
.main-nav .nav-item > a:hover::after,
.main-nav .nav-item.active > a::after,
.main-nav .nav-item > a.active::after { transform: translateX(-50%) scaleX(1); }

/* 下拉菜单 */
.nav-sub {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 160px;
  padding: 6px 0;
  background: rgba(15, 40, 24, .98);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,.1);
  border-top: 2px solid var(--c-green);
  border-radius: 0 0 4px 4px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
  /* Hover-intent: when the cursor leaves, wait before hiding so a brief
     gap (fast diagonal move, or the header shifting when it turns sticky)
     doesn't make the submenu flicker/disappear. */
  transition-delay: .25s;
  z-index: 100;
  box-shadow: 0 12px 28px rgba(0,0,0,.45);
}
.nav-sub::before {
  content: '';
  position: absolute;
  /* bridge the gap between the top-level link and the dropdown so moving
     the cursor across it keeps the menu open */
  inset: -14px 0 auto 0;
  height: 14px;
}
.nav-item.has-sub:hover .nav-sub,
.nav-item.has-sub:focus-within .nav-sub {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
  /* show immediately on hover (no delay), only the hide is delayed */
  transition-delay: 0s;
}
.nav-sub li a {
  display: block;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  white-space: nowrap;
  transition: background .15s, color .15s, padding .2s;
}
.nav-sub li a:hover {
  background: rgba(113,190,110,.14);
  color: var(--c-green);
  padding-left: 22px;
}
.nav-sub li a.todo {
  color: rgba(255,255,255,.5);
}
.nav-sub li a.todo::after {
  content: '即将上线';
  font-size: 10px;
  padding: 1px 6px;
  margin-left: 8px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 3px;
  vertical-align: 1px;
  color: rgba(255,255,255,.45);
}

/* 语言切换 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: var(--radius-pill);
  padding: 2px;
  flex-shrink: 0;
  background: rgba(255,255,255,.05);
}
.lang-btn {
  padding: 6px 14px;
  font-size: 14px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  color: #fff;
  transition: background .2s, color .2s;
}
.lang-btn.active { background: var(--c-green); color: #fff; }
.lang-btn:not(.active):hover { color: var(--c-green); }

/* 移动端菜单按钮 */
.mobile-toggle { display: none; }

/* ========================================================
   sd-dots
   ======================================================== */
.sd-dots {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 56px;
  margin-top: 13px;
}
.sd-dots i {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  display: inline-block;
  opacity: .45;
  transform-origin: center bottom;
  animation: dotWave 1.6s ease-in-out infinite;
}
/*.sd-dots i:nth-child(1) { animation-delay: 0s;    }
.sd-dots i:nth-child(2) { animation-delay: .12s;  }
.sd-dots i:nth-child(3) { animation-delay: .24s;  }
.sd-dots i:nth-child(4) { animation-delay: .36s;  }
.sd-dots i:nth-child(5) { animation-delay: .48s;  }
.sd-dots i:nth-child(6) { animation-delay: .60s;  }
@keyframes dotWave {
  0%, 60%, 100% { transform: translateY(0) scale(1);   opacity: .45; }
  30%           { transform: translateY(-5px) scale(1.45); opacity: 1; }
}*/

/* ========================================================
   页尾 FOOTER (全站公共)
   ======================================================== */
.site-footer {
  padding: 56px 0 50px;
  /*border-top: 1px solid var(--c-green);*/
  background: var(--c-bg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}
.footer-title {
  font-family: var(--font-cn);
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 22px;
}
.footer-logo {
  display: inline-flex;
  margin-bottom: 22px;
}
.footer-logo img {
  height: 36px;
  width: auto;
}
.footer-copy {
  font-family: var(--font-en);
  font-size: 13px;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
}
.footer-copy-sm {
  font-family: var(--font-cn);
  font-size: 12px;
  color: rgba(255,255,255,.6);
}

.footer-contacts {padding-top: 17px;}
.fc-label {
  font-family: var(--font-cn);
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.fc-label-2 { margin-top: 22px; }
.fc-value {
  font-family: var(--font-cn);
  /* font-size: 14px; */
  color: rgba(255,255,255,.85);
  margin-bottom: 4px;
}

.footer-qrs {
  display: flex;
  gap: 24px;
  justify-content: flex-end;
  padding-top: 26px;
}
.qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.qr-img {
  width: 100px;
  height: 100px;
  /* background: #fff; */
  border-radius: 4px;
  position: relative;
}

.qr figcaption {
  font-family: var(--font-cn);
  font-size: 13px;
  color: rgba(255,255,255,.8);
}

/* ========================================================
   滚动返回顶部 (公共)
   ======================================================== */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--c-green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s, visibility .25s, transform .25s, background .25s;
  z-index: 50;
}
.scroll-top.show { opacity: 1; visibility: visible; }
.scroll-top:hover { background: var(--c-green-d); transform: translateY(-3px); }

/* ========================================================
   滚动渐入动画 (公共)
   ======================================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================================
   公共响应式（仅页头/页尾/全局）
   ======================================================== */
@media (max-width: 1200px) {
  .footer-grid { grid-template-columns: 1fr 1; gap: 40px; }
  .footer-qrs { grid-column: 1 / -1; justify-content: flex-start; padding-top: 0; }
}

@media (max-width: 1024px) {
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  .brand-logo img { height: 32px; }
  .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #0f2818; flex-direction: column; padding: 12px 28px 18px; gap: 0; border-top: 1px solid rgba(255,255,255,.1); box-shadow: 0 16px 30px rgba(0,0,0,.5); max-height: 80vh; overflow-y: auto; -webkit-overflow-scrolling: touch; z-index: 60; }
  .main-nav.open { display: flex; }
  .main-nav .nav-item { width: 100%; border-bottom: 1px solid rgba(255,255,255,.08); }
  .main-nav .nav-item:last-child { border-bottom: none; }
  .main-nav .nav-item > a { font-size: 16px; padding: 14px 0; width: 100%; display: flex; align-items: center; justify-content: space-between; }
  .main-nav .nav-item > a::after { display: none; }
  .main-nav .nav-item.has-sub > a::after {
    content: '+';
    display: inline-block;
    /* reset the desktop underline-bar styles so only the "+" shows */
    position: static;
    width: auto;
    height: auto;
    background: none;
    transform: none;
    font-size: 18px;
    line-height: 1;
    color: rgba(255,255,255,.55);
    transition: transform .25s, color .2s;
    margin-left: 12px;
  }
  .main-nav .nav-item.has-sub.open > a::after {
    transform: rotate(45deg);
    color: var(--c-green);
  }

  .nav-sub {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: rgba(0,0,0,.25);
    border: none;
    border-radius: 0;
    box-shadow: none;
    min-width: 0;
    max-height: 0;
    overflow: hidden;
    padding: 0;
    transition: max-height .3s ease, padding .3s ease;
    transition-delay: 0s; /* the desktop hover-intent delay must not slow the mobile accordion */
  }
  .nav-sub::before { display: none; }
  .nav-item.has-sub.open .nav-sub {
    max-height: 400px;
    padding: 6px 0 10px;
  }
  /* The desktop dropdown's :hover/:focus-within rule has higher specificity
     than the plain ".nav-sub" override above, so it wins the transform
     property even on mobile whenever the cursor rests on the tapped link
     (very common right after a tap) or the link keeps keyboard focus.
     Re-declare it here, same selector, so mobile keeps position:static
     with no offsetting transform regardless of hover/focus state. */
  .nav-item.has-sub:hover .nav-sub,
  .nav-item.has-sub:focus-within .nav-sub {
    transform: none;
  }
  .nav-sub li a { font-size: 14px; padding: 10px 18px 10px 22px; }

  .mobile-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    width: 32px; height: 32px;
    align-items: center;
    justify-content: center;
  }
  .mobile-toggle span { width: 20px; height: 2px; background: #fff; transition: transform .25s, opacity .25s; }
  .mobile-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .mobile-toggle.open span:nth-child(2) { opacity: 0; }
  .mobile-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 640px) {
  :root { --gutter: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-contacts, .footer-qrs { padding-top: 0; }
  .footer-qrs { gap: 14px; flex-wrap: wrap; }
}