/* =============================================================
   科纳云 统一导航 / KonaCloud unified header
   -------------------------------------------------------------
   自包含样式：不依赖 static/css/*.css 或 css/style.css 里的任何
   变量与类名，因此可以同时安全地用在两套旧模板上。
   全部选择器以 .kc-topbar / .kc-nav 前缀命名，避免与
   .head(旧模板A) 和 .navbar(旧模板B) 冲突。
   ============================================================= */

.kc-topbar {
  --kcn-ink: #0f172a;
  --kcn-text: #334155;
  --kcn-muted: #64748b;
  --kcn-primary: #2563eb;
  --kcn-primary-d: #1d4ed8;
  --kcn-border: #e6ebf2;
  --kcn-h: 64px;

  position: sticky;
  top: 0;
  z-index: 1200;
  width: 100%;
  box-sizing: border-box;
  border-bottom: 1px solid var(--kcn-border);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
               'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  transition: box-shadow .25s ease;
  /* 注意：这里绝对不能直接写 backdrop-filter / transform / filter。
     它们会让 .kc-topbar 成为 position:fixed 后代的包含块，
     导致移动端抽屉(.kc-nav-menu)被困在 64px 高的顶栏里而不是铺满视口。
     毛玻璃效果改由下面的 ::before 图层承担。 */
}
.kc-topbar::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(18px) saturate(170%);
  backdrop-filter: blur(18px) saturate(170%);
}
.kc-topbar.is-stuck { box-shadow: 0 6px 24px -12px rgba(15, 40, 90, .22); }
.kc-topbar *, .kc-topbar *::before, .kc-topbar *::after { box-sizing: border-box; }

.kc-nav {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--kcn-h);
  display: flex;
  align-items: center;
  gap: 20px;
}

/* ---------- logo ---------- */
.kc-nav-logo { flex: 0 0 auto; display: flex; align-items: center; min-height: 44px; text-decoration: none; }
.kc-nav-logo img { height: 30px; width: auto; display: block; }

/* ---------- 主菜单 ---------- */
.kc-nav-menu {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-width: 0;
}
.kc-nav-item {
  position: relative;
  display: flex;
  align-items: center;
}
.kc-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: var(--kcn-h);
  padding: 0 13px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  color: var(--kcn-text);
  text-decoration: none;
  white-space: nowrap;
  background: none;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  transition: color .18s ease;
}
.kc-nav-link:hover, .kc-nav-link:focus-visible { color: var(--kcn-primary); }
.kc-nav-link[aria-current="page"] { color: var(--kcn-ink); font-weight: 600; }
.kc-nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 13px; right: 13px; bottom: 14px;
  height: 2px; border-radius: 2px;
  background: var(--kcn-primary);
}
.kc-nav-caret { width: 10px; height: 10px; flex: 0 0 auto; transition: transform .2s ease; }
.kc-nav-item.is-open > .kc-nav-link .kc-nav-caret { transform: rotate(180deg); }

/* ---------- 下拉面板 ---------- */
.kc-nav-panel {
  position: absolute;
  top: calc(var(--kcn-h) - 6px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 210px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--kcn-border);
  border-radius: 14px;
  box-shadow: 0 24px 48px -18px rgba(15, 40, 90, .28);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.kc-nav-panel.is-wide { min-width: 430px; }
.kc-nav-panel-grid { display: grid; grid-template-columns: 1fr; gap: 2px; }
.kc-nav-panel.is-wide .kc-nav-panel-grid { grid-template-columns: 1fr 1fr; gap: 2px 8px; }
.kc-nav-item:hover > .kc-nav-panel,
.kc-nav-item:focus-within > .kc-nav-panel,
.kc-nav-item.is-open > .kc-nav-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.kc-nav-panel a {
  display: block;
  padding: 9px 12px;
  border-radius: 9px;
  font-size: 14px;
  line-height: 1.35;
  color: var(--kcn-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background .16s ease, color .16s ease;
}
.kc-nav-panel a:hover, .kc-nav-panel a:focus-visible {
  background: #f2f6ff;
  color: var(--kcn-primary-d);
}
.kc-nav-panel a[aria-current="page"] { background: #eef4ff; color: var(--kcn-primary-d); font-weight: 600; }
.kc-nav-panel-head {
  grid-column: 1 / -1;      /* 分组标题跨满整行，避免多列时错位 */
  padding: 4px 12px 6px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: #64748b;   /* 4.76:1 on #fff, 原 #94a3b8 只有 2.56:1 */
}
.kc-nav-panel-head + a { margin-top: -2px; }
.kc-nav-panel-grid > .kc-nav-panel-head:not(:first-child) {
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px solid #f1f5f9;
}

/* ---------- 右侧动作区 ---------- */
.kc-nav-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.kc-nav-ghost,
.kc-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 18px;
  border-radius: 9px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: all .18s ease;
}
.kc-nav-ghost { color: var(--kcn-text); border: 1px solid var(--kcn-border); background: #fff; }
.kc-nav-ghost:hover { color: var(--kcn-primary); border-color: #bcd0f7; background: #f5f8ff; }
.kc-nav-cta {
  color: #fff;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--kcn-primary), #3b82f6);
  box-shadow: 0 6px 18px -8px rgba(37, 99, 235, .55);
}
.kc-nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 24px -8px rgba(37, 99, 235, .65); }

/* ---------- 汉堡键 ---------- */
.kc-nav-burger {
  display: none;
  flex: 0 0 auto;
  width: 44px; height: 44px;
  margin-left: auto;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--kcn-border);
  border-radius: 10px;
  color: var(--kcn-ink);
  cursor: pointer;
}
.kc-nav-burger svg { width: 22px; height: 22px; display: block; }

.kc-nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 1190;
  background: rgba(15, 23, 42, .45);
  opacity: 0;
  visibility: hidden;
  transition: opacity .24s ease, visibility .24s;
}
body.kc-nav-open .kc-nav-scrim { opacity: 1; visibility: visible; }
body.kc-nav-open { overflow: hidden; }

/* 键盘可见焦点 */
.kc-topbar a:focus-visible,
.kc-topbar button:focus-visible {
  outline: 2px solid var(--kcn-primary);
  outline-offset: 2px;
  border-radius: 6px;
}

/* =================== 响应式 =================== */
@media (max-width: 1180px) {
  .kc-nav { gap: 12px; }
  .kc-nav-link { padding: 0 10px; font-size: 14.5px; }
  .kc-nav-ghost { display: none; }
}

@media (max-width: 980px) {
  .kc-nav { padding: 0 16px; }
  .kc-nav-burger { display: inline-flex; }
  .kc-nav-actions { margin-left: auto; }
  .kc-nav-ghost { display: none; }
  .kc-nav-cta { height: 44px; padding: 0 16px; font-size: 13.5px; }

  /* 抽屉 */
  .kc-nav-menu {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    z-index: 1210;
    width: min(86vw, 340px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 0;
    padding: 18px 16px calc(28px + env(safe-area-inset-bottom, 0px));
    background: #fff;
    border-left: 1px solid var(--kcn-border);
    box-shadow: -18px 0 44px -20px rgba(15, 40, 90, .4);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(100%);
    transition: transform .28s cubic-bezier(.22, 1, .36, 1);
  }
  body.kc-nav-open .kc-nav-menu { transform: translateX(0); }

  .kc-nav-item { display: block; }
  .kc-nav-link {
    width: 100%;
    height: auto;
    min-height: 48px;
    padding: 13px 12px;
    justify-content: space-between;
    font-size: 16px;
    border-radius: 10px;
  }
  .kc-nav-link[aria-current="page"] { background: #eef4ff; }
  .kc-nav-link[aria-current="page"]::after { display: none; }
  .kc-nav-caret { width: 14px; height: 14px; }

  /* 下拉在移动端变折叠面板 */
  .kc-nav-panel {
    position: static;
    transform: none;
    min-width: 0;
    max-height: 0;
    padding: 0 0 0 10px;
    margin: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    overflow: hidden;
    transition: max-height .28s ease, padding .28s ease;
  }
  .kc-nav-panel.is-wide { min-width: 0; }
  .kc-nav-panel.is-wide .kc-nav-panel-grid { grid-template-columns: 1fr; }
  .kc-nav-item:hover > .kc-nav-panel,
  .kc-nav-item:focus-within > .kc-nav-panel { max-height: 0; }
  .kc-nav-item.is-open > .kc-nav-panel {
    max-height: 720px;
    padding: 2px 0 8px 10px;
    transform: none;
  }
  .kc-nav-panel a { min-height: 44px; display: flex; align-items: center; font-size: 15px; }
  .kc-nav-panel-head { padding: 10px 12px 4px; }

  .kc-nav-drawer-foot {
    display: block;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--kcn-border);
  }
  .kc-nav-drawer-foot a {
    display: flex;
    align-items: center;
    min-height: 46px;
    padding: 10px 12px;
    font-size: 15px;
    color: var(--kcn-text);
    text-decoration: none;
    border-radius: 10px;
  }
  .kc-nav-drawer-foot a:hover { background: #f2f6ff; color: var(--kcn-primary-d); }
}

@media (min-width: 981px) {
  .kc-nav-drawer-foot { display: none; }
}

@media (max-width: 400px) {
  .kc-nav-logo img { height: 26px; }
  .kc-nav-cta { padding: 0 12px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  .kc-topbar, .kc-nav-menu, .kc-nav-panel, .kc-nav-cta, .kc-nav-caret { transition: none !important; }
}

/* =============================================================
   共享的移动端点击目标修正
   顶栏与页脚的链接原本只有 22-36px 高，低于 44px 的可点区建议值。
   这里同时覆盖两套旧模板的页脚结构（.footer-col / .footer-bottom）。
   ============================================================= */
@media (max-width: 980px) {
  /* 堆叠排列的页脚链接：整行可点 */
  .footer-col a,
  .footer-col .footer-svc-item {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  /* 句子中的行内链接：用垂直 padding 扩大命中区，不破坏行内排版 */
  .footer-bottom a,
  .footer-brand a,
  .footer-social-link,
  .footer a[href^="tel:"],
  .footer a[href^="mailto:"] {
    display: inline-block;
    padding-top: 11px;
    padding-bottom: 11px;
  }
}

/* ---- 其余低于 44px 的可点控件（分类筛选、计费切换、分享、复制、表单） ---- */
@media (max-width: 980px) {
  .news-filter-btn,
  .filter-btn,
  .billing-btn,
  .share-btn,
  .code-copy,
  .featured-readmore {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .code-copy { min-width: 56px; }

  /* 表单控件：iOS 上小于 16px 的字号还会触发自动缩放 */
  input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]),
  select,
  textarea {
    min-height: 44px;
    font-size: 16px;
  }
  textarea { min-height: 88px; }

  /* 底栏备案号等行内链接 */
  .footer-bottom a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding-top: 0;
    padding-bottom: 0;
  }
}