/**
 * 产品侧边导航 — px 单位，全页面通用（不依赖 rem.js）
 */
:root {
  /* 侧边栏占用宽度：left 12 + width 230 + 间距 18 */
  --ss-side-nav-space: 260px;
}

@media (max-width: 767px) {
  :root {
    --ss-side-nav-space: 0px;
  }
}

.ss-side-nav {
  position: fixed;
  left: 12px;
  top: 100px;
  z-index: 9990;
  width: 230px;
  max-height: calc(100vh - 120px);
  overflow: auto;
  scrollbar-width: none;
  background: rgba(255, 255, 255, 0.97);
  color: #2a2f36;
  border: 1px solid #e4e8ed;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(3px);
  box-sizing: border-box;
}

.ss-side-nav::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.ss-side-nav__hd {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 12px 14px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: rgba(200, 42, 43, 0.92);
}

.ss-side-nav__list {
  margin: 0;
  padding: 10px 10px 12px;
  list-style: none;
}

.ss-side-nav__list li {
  margin: 0 0 6px;
}

.ss-side-nav__list a {
  display: block;
  padding: 8px 9px;
  border-radius: 5px;
  text-decoration: none;
  color: #2f3742;
  font-size: 13px;
  line-height: 1.45;
  font-weight: 400;
  transition: background-color 0.2s, color 0.2s;
}

.ss-side-nav__list a:hover,
.ss-side-nav__list a.is-active {
  background: rgba(200, 42, 43, 0.22);
  color: #fff;
}

.ss-side-nav__down-btn {
  position: sticky;
  bottom: 0;
  width: 100%;
  height: 40px;
  border: 0;
  border-top: 1px solid #e4e8ed;
  background: #fff;
  color: #c82a2b;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.ss-side-nav__down-btn:hover {
  background: #fff5f5;
}

.ss-side-nav__down-btn img {
  width: 22px;
  height: 22px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

.ss-side-nav__mobile-toggle,
.ss-side-nav__mobile-close,
.ss-side-nav__mask {
  display: none;
}

@media (max-width: 767px) {
  .ss-side-nav {
    left: 0;
    top: 0;
    bottom: 0;
    width: 82vw;
    max-width: 320px;
    max-height: none;
    border-radius: 0;
    border: 0;
    transform: translateX(-100%);
    transition: transform 0.24s ease;
  }

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

  .ss-side-nav__mobile-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 10px;
    padding: 6px 12px;
    border: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 13px;
    cursor: pointer;
  }

  .ss-side-nav__mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    left: 16px;
    bottom: 20px;
    z-index: 9991;
    height: 40px;
    padding: 0 16px;
    border: 0;
    border-radius: 999px;
    background: #c82a2b;
    color: #fff;
    font-size: 14px;
    box-shadow: 0 5px 16px rgba(0, 0, 0, 0.35);
    cursor: pointer;
  }

  .ss-side-nav__mask {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.42);
    z-index: 9989;
  }

  .ss-side-nav__mask.is-open {
    display: block;
  }
}

@media (min-width: 768px) {
  .ss-side-nav__mobile-toggle,
  .ss-side-nav__mobile-close,
  .ss-side-nav__mask {
    display: none !important;
  }
}