/* =========================================================
   CCVB · nav.css —— 多级导航（一级栏目 → 全宽下拉面板 → 列表 → 详情）
   依赖 site.css 的设计令牌，自动适配暗/亮主题
   ========================================================= */

/* ---------- 一级项 ---------- */
.nav-links > li { position: relative; }
.nav-links > li > a { display: inline-flex; align-items: center; }

.ccvb-caret {
  display: inline-block;
  width: 7px; height: 7px;
  margin-left: 7px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform .25s ease;
  opacity: .5;
}
.nav-links > li.is-open > a .ccvb-caret { transform: translateY(1px) rotate(-135deg); opacity: .9; }
.nav-links > li.is-open > a,
.nav-links > li.has-panel > a:hover { color: var(--color-ink); }

/* 面板打开时，顶栏底色实心化，避免与面板叠色 */
.nav.ccvb-panel-open {
  background: var(--color-bg-soft);
  border-color: var(--color-line);
}

/* ---------- 下拉面板 ---------- */
.ccvb-panel {
  position: fixed;
  top: 68px; left: 0; right: 0;
  z-index: 99;
  background: color-mix(in srgb, var(--color-bg-soft) 97%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--color-line);
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - 68px);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
}
.ccvb-panel.is-open { opacity: 1; visibility: visible; transform: translateY(0); }

.ccvb-panel-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 36px 32px 42px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 272px;
  gap: 24px 44px;
}

/* ---------- 面板头 ---------- */
.ccvb-panel-head {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-line);
}
.ccvb-eyebrow {
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.ccvb-panel-title {
  margin-top: 8px;
  font-size: 25px;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.25;
  color: var(--color-ink);
}
.ccvb-close {
  flex: none;
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1;
  transition: color .2s, border-color .2s, transform .2s;
}
.ccvb-close:hover { color: var(--color-ink); border-color: currentColor; transform: rotate(90deg); }

/* ---------- 主区 / 侧区 ---------- */
.ccvb-panel-main { display: flex; flex-direction: column; gap: 30px; }
.ccvb-col { min-width: 0; }
.ccvb-sec-label {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 14px;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.ccvb-sec-label::after { content: ""; flex: 1; height: 1px; background: var(--color-line); }

.ccvb-side {
  border-left: 1px solid var(--color-line);
  padding-left: 34px;
}
.ccvb-side-links { display: flex; flex-direction: column; }
.ccvb-side-links a {
  font-size: 13.5px;
  color: var(--color-muted);
  padding: 8px 0;
  transition: color .2s, padding-left .2s;
}
.ccvb-side-links a:hover { color: var(--color-ink); padding-left: 7px; }
.ccvb-side-note {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  font-size: 12px;
  line-height: 1.75;
  color: var(--color-muted);
}

/* ---------- 卡片（子栏目 / 内容） ---------- */
.ccvb-cards {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(228px, 1fr));
}
.ccvb-card {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.ccvb-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--color-ink) 28%, transparent);
  box-shadow: var(--shadow-md);
}
.ccvb-card-bar { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--ccvb-acc, var(--accent-curiosity)); }
.ccvb-card-media {
  aspect-ratio: 16 / 10;
  background-size: cover;
  background-position: center;
  position: relative;
}
.ccvb-card-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 45%, rgba(0,0,0,.5));
}
.ccvb-card-badge {
  position: absolute; left: 12px; bottom: 10px;
  z-index: 1;
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #fff;
  opacity: .9;
}
.ccvb-card-media,
.ccvb-card-body,
.ccvb-card-name { display: block; }

.ccvb-card-body { padding: 13px 15px 16px; }
.ccvb-card-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.4;
}
.ccvb-card-desc {
  margin-top: 5px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--color-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 最新内容列表（有子栏目时用紧凑列表） ---------- */
.ccvb-list { display: flex; flex-direction: column; }
.ccvb-item {
  display: flex; gap: 14px;
  padding: 11px 6px;
  border-bottom: 1px solid var(--color-line);
  transition: background .2s;
}
.ccvb-item:last-child { border-bottom: none; }
.ccvb-item:hover { background: color-mix(in srgb, var(--color-ink) 5%, transparent); }
.ccvb-item-thumb {
  flex: none;
  width: 74px; height: 48px;
  border-radius: 6px;
  background-size: cover;
  background-position: center;
}
.ccvb-item-main { min-width: 0; }
.ccvb-item-title {
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-ink);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ccvb-item-date {
  margin-top: 4px;
  font-size: 11.5px;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

/* ---------- 查看全部 ---------- */
.ccvb-more {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: gap .2s ease;
}
.ccvb-more:hover { gap: 14px; }

/* ---------- 空态 ---------- */
.ccvb-empty {
  padding: 26px 0 8px;
  font-size: 13px;
  color: var(--color-muted);
}

/* ---------- 移动端：面板收进导航列表内 ---------- */
.ccvb-sub { display: none; }
@media (max-width: 980px) {
  .ccvb-panel { display: none !important; }
  .ccvb-sub {
    list-style: none;
    display: none;
    margin: 2px 0 8px 26px;
    padding-left: 16px;
    border-left: 1px solid var(--color-line);
  }
  .ccvb-sub.is-open { display: block; }
  .ccvb-sub a { display: block; padding: 9px 0; font-size: 13.5px; color: var(--color-muted); }
}
@media (min-width: 981px) {
  .ccvb-sub { display: none !important; }
}

/* =========================================================
   CCVB · Hero "四个单词" 触发器
   ---------------------------------------------------------
   主页底部 4 个单词（Curiosity / Courage / Vitality / Belief）
   为直接跳转链接，分别指向 /news/ /product/ /case/ /download/。
   此处仅定义按钮化的悬停反馈，点击行为由浏览器默认导航完成。
   ========================================================= */

.ccvb-word {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 8px;
  margin: 0 2px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: inherit;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
  transition: color .25s ease, border-color .25s ease, background .25s ease;
}
.ccvb-word .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: .55;
  transition: transform .25s ease, opacity .25s ease, background .25s ease;
}
.ccvb-word:hover {
  color: var(--color-ink);
  background: color-mix(in srgb, var(--color-ink) 5%, transparent);
  border-color: var(--color-line);
}
.ccvb-word:hover .dot { opacity: 1; transform: scale(1.35); }
.ccvb-word:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

/* 移动端：缩小内边距 */
@media (max-width: 980px) {
  .ccvb-word { padding: 4px 10px; }
}