:root {
  --jd-primary: #1F3A5F;
  --jd-primary-strong: #162B46;
  --jd-secondary: #5E8B7E;
  --jd-secondary-soft: #E6EFEC;
  --jd-background: #F6F8FB;
  --jd-surface: #FFFFFF;
  --jd-surface-soft: #F1F5F9;
  --jd-border: #D6DEE8;
  --jd-text: #1E293B;
  --jd-text-soft: #475569;
  --jd-text-faint: #64748B;
  --jd-warning: #B7791F;
  --jd-danger-soft: #FFF1F2;
  --jd-success-soft: #ECFDF5;
  --jd-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --jd-radius-sm: 10px;
  --jd-radius-md: 18px;
  --jd-radius-lg: 28px;
  --jd-container: 1180px;
  --jd-content: 760px;
}

body.palette-forest-calm {
  --jd-primary: #234B3B;
  --jd-primary-strong: #1A382C;
  --jd-secondary: #7A8F6A;
  --jd-secondary-soft: #EAF1E6;
  --jd-background: #F4F7F2;
  --jd-surface-soft: #EFF4EC;
  --jd-border: #D7E3D6;
}

body.palette-warm-stone {
  --jd-primary: #495664;
  --jd-primary-strong: #39434D;
  --jd-secondary: #8A7F73;
  --jd-secondary-soft: #EFE7E2;
  --jd-background: #F7F4EF;
  --jd-surface-soft: #F5F0E9;
  --jd-border: #E4D9CD;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--jd-background);
  color: var(--jd-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 18px;
  line-height: 1.8;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--jd-primary);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--jd-primary-strong);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(94, 139, 126, 0.35);
  outline-offset: 2px;
}

.site-main,
.nv-site-content,
.jiedu-home,
.jiedu-single {
  background: var(--jd-background);
}

.jiedu-container {
  width: min(100% - 32px, var(--jd-container));
  margin: 0 auto;
}

.jiedu-narrow {
  width: min(100% - 32px, var(--jd-content));
  margin: 0 auto;
}

.jiedu-section {
  padding: 72px 0;
}

.jiedu-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(31, 58, 95, 0.08);
  color: var(--jd-primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.jiedu-button,
.wp-block-button__link,
button,
input[type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  background: var(--jd-primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 10px 30px rgba(31, 58, 95, 0.22);
  cursor: pointer;
}

.jiedu-button:hover,
.wp-block-button__link:hover,
button:hover,
input[type="submit"]:hover {
  background: var(--jd-primary-strong);
  color: #fff;
  transform: translateY(-1px);
}

.jiedu-button--ghost {
  background: transparent;
  color: var(--jd-primary);
  border: 1px solid var(--jd-border);
  box-shadow: none;
}

.jiedu-button--soft {
  background: var(--jd-secondary-soft);
  color: var(--jd-primary-strong);
  box-shadow: none;
}

/* site shell */
.jiedu-site-content {
  min-height: 40vh;
}

.jiedu-topbar {
  background: var(--jd-primary-strong);
  color: #fff;
  font-size: 14px;
}

.jiedu-topbar__inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 10px 0;
}

.jiedu-topbar p {
  margin: 0;
  color: rgba(255,255,255,.88);
}

.jiedu-topbar a {
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.jiedu-site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246,248,251,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--jd-border);
}

.jiedu-header-main {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 16px 0;
}

.jiedu-branding__link {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--jd-text);
}

.jiedu-branding__mark {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--jd-primary), var(--jd-secondary));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  box-shadow: var(--jd-shadow);
}

.jiedu-branding__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.jiedu-branding__text strong {
  font-size: 20px;
  color: var(--jd-primary-strong);
}

.jiedu-branding__text small {
  font-size: 13px;
  color: var(--jd-text-faint);
}

.jiedu-main-nav {
  justify-self: center;
}

.jiedu-menu {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.jiedu-menu li {
  margin: 0;
}

.jiedu-menu a {
  display: block;
  padding: 10px 14px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--jd-text);
  font-weight: 700;
}

.jiedu-menu a:hover,
.jiedu-menu .current-menu-item > a {
  background: var(--jd-surface);
  box-shadow: var(--jd-shadow);
  color: var(--jd-primary);
}

.jiedu-header-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}

.jiedu-menu-toggle {
  display: none;
  background: var(--jd-surface);
  color: var(--jd-primary);
  border: 1px solid var(--jd-border);
  box-shadow: none;
}

/* footer */
.jiedu-site-footer {
  margin-top: 56px;
  background: linear-gradient(180deg, var(--jd-primary-strong), #0f1f33);
  color: rgba(255,255,255,.9);
}

.jiedu-footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 28px;
  padding: 40px 0 28px;
}

.jiedu-site-footer h3 {
  margin: 0 0 12px;
  font-size: 18px;
  color: #fff;
}

.jiedu-site-footer p,
.jiedu-site-footer li,
.jiedu-site-footer a {
  color: rgba(255,255,255,.84);
  font-size: 15px;
}

.jiedu-site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.jiedu-site-footer li {
  margin: 8px 0;
}

.jiedu-site-footer a {
  text-decoration: none;
}

.jiedu-site-footer a:hover {
  color: #fff;
}

.jiedu-footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 16px 0 24px;
  font-size: 14px;
}

/* floating help */
.jiedu-floating-help {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: 999px;
  background: var(--jd-primary);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 18px 32px rgba(31, 58, 95, 0.28);
}

.jiedu-floating-help:hover {
  color: #fff;
}

.text-center { text-align: center; }
.text-soft { color: var(--jd-text-soft); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

@media (max-width: 1120px) {
  .jiedu-header-main {
    grid-template-columns: auto 1fr auto;
  }

  .jiedu-header-cta {
    display: none;
  }

  .jiedu-footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .jiedu-topbar__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .jiedu-header-main {
    grid-template-columns: auto auto;
    grid-template-areas:
      'brand toggle'
      'nav nav';
  }

  .jiedu-branding {
    grid-area: brand;
  }

  .jiedu-menu-toggle {
    display: inline-flex;
    grid-area: toggle;
    justify-self: end;
  }

  .jiedu-main-nav {
    grid-area: nav;
    display: none;
    justify-self: stretch;
  }

  .jiedu-main-nav.is-open {
    display: block;
  }

  .jiedu-menu {
    flex-direction: column;
    align-items: stretch;
    background: var(--jd-surface);
    border: 1px solid var(--jd-border);
    border-radius: 20px;
    padding: 10px;
    box-shadow: var(--jd-shadow);
  }

  .jiedu-menu a {
    padding: 12px 14px;
  }

  .jiedu-footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  body {
    font-size: 16px;
  }
}

@media (max-width: 768px) {
  .jiedu-floating-help {
    left: 16px;
    right: 16px;
    justify-content: center;
    bottom: 14px;
  }
}

@media print {
  .jiedu-floating-help,
  .site-footer,
  .nv-navbar,
  .header,
  .comments-area {
    display: none !important;
  }
}

/* === Jiedu v2.4 compact header + real site icon logo === */
.jiedu-site-header {background: rgba(250,250,248,.94); border-bottom: 1px solid rgba(26,61,92,.10);}
.jiedu-header-main {padding: 10px 0; gap: 18px;}
.jiedu-branding__link {gap: 10px; min-width: 0;}
.jiedu-branding__logo {display:block;width:46px;height:46px;border-radius:14px;object-fit:cover;box-shadow:0 8px 22px rgba(15,36,55,.10);background:#fff;}
.jiedu-branding__mark {width:46px;height:46px;border-radius:14px;box-shadow:0 8px 22px rgba(15,36,55,.10);}
.jiedu-branding__text strong {font-size:18px;line-height:1.15;letter-spacing:-.02em;}
.jiedu-branding__text small {font-size:12px;line-height:1.3;max-width:360px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.jiedu-menu {gap:4px;justify-content:center;}
.jiedu-menu a {padding:8px 10px;font-size:15px;font-weight:750;}
.jiedu-header-cta .jiedu-button {min-height:42px;padding:10px 15px;font-size:15px;}
.jiedu-topbar {display:none;}
@media (max-width: 980px){.jiedu-branding__text small{max-width:260px}.jiedu-header-main{grid-template-columns:auto auto;}.jiedu-header-cta{display:none;}}
@media (max-width: 820px){.jiedu-header-main{padding:10px 0}.jiedu-branding__logo,.jiedu-branding__mark{width:42px;height:42px;border-radius:12px}.jiedu-branding__text strong{font-size:16px}.jiedu-branding__text small{display:none}.jiedu-menu a{font-size:15px}}

/* Single post: hide duplicate featured image if legacy markup is cached. */
.single .jiedu-single__featured {display:none!important;}
.single .jiedu-single__title {font-size:clamp(28px,4vw,42px);}

/* === Jiedu v2.6 precise spacing + header repair === */
.jiedu-site-header{background:rgba(250,250,248,.98)!important;border-bottom:1px solid rgba(26,61,92,.10)!important;box-shadow:0 1px 0 rgba(15,36,55,.03)!important;}
.jiedu-header-main{display:flex!important;align-items:center!important;justify-content:space-between!important;gap:18px!important;padding:8px 0!important;min-height:68px!important;flex-wrap:nowrap!important;}
.jiedu-branding{flex:0 1 430px!important;min-width:300px!important;}
.jiedu-branding__link{gap:10px!important;min-width:0!important;}
.jiedu-branding__logo,.jiedu-branding__mark{width:42px!important;height:42px!important;border-radius:12px!important;flex:0 0 42px!important;box-shadow:0 6px 16px rgba(15,36,55,.08)!important;}
.jiedu-branding__text strong{font-size:18px!important;line-height:1.12!important;letter-spacing:-.02em!important;white-space:nowrap!important;}
.jiedu-branding__text small{font-size:12px!important;line-height:1.24!important;max-width:360px!important;white-space:nowrap!important;overflow:hidden!important;text-overflow:ellipsis!important;}
.jiedu-main-nav{flex:1 1 auto!important;min-width:0!important;justify-self:auto!important;}
.jiedu-menu{display:flex!important;flex-wrap:nowrap!important;align-items:center!important;justify-content:center!important;gap:2px!important;white-space:nowrap!important;}
.jiedu-menu a{padding:7px 8px!important;font-size:14px!important;line-height:1.15!important;font-weight:750!important;white-space:nowrap!important;}
.jiedu-header-cta{flex:0 0 auto!important;gap:8px!important;}
.jiedu-header-cta .jiedu-button{min-height:38px!important;padding:8px 13px!important;font-size:14px!important;box-shadow:0 8px 18px rgba(31,58,95,.14)!important;}
.jiedu-site-content{min-height:0!important;}
.jiedu-site-footer{margin-top:0!important;}
.jiedu-footer-grid{padding:28px 0 20px!important;gap:22px!important;}
.jiedu-footer-bottom{padding:12px 0 18px!important;}
@media (max-width:1280px){.jiedu-branding{flex-basis:360px!important;min-width:260px!important}.jiedu-branding__text small{max-width:280px!important}.jiedu-menu a{font-size:13px!important;padding:7px 6px!important}.jiedu-header-cta .jiedu-button{font-size:13px!important;padding:8px 11px!important}}
@media (max-width:1120px){.jiedu-header-cta{display:none!important}.jiedu-branding{flex-basis:360px!important}.jiedu-menu a{font-size:13px!important}}
@media (max-width:820px){.jiedu-header-main{display:grid!important;grid-template-columns:auto auto!important;min-height:60px!important;padding:8px 0!important}.jiedu-main-nav{display:none!important}.jiedu-main-nav.is-open{display:block!important}.jiedu-menu{flex-direction:column!important;align-items:stretch!important;white-space:normal!important}.jiedu-branding{min-width:0!important}.jiedu-branding__text strong{font-size:16px!important}.jiedu-branding__text small{display:none!important}}

/* Single post compact hero and readable article titles. */
.single .jiedu-single{padding:18px 0 48px!important;}
.single .jiedu-single__hero{width:min(100%,1000px)!important;margin:0 auto 22px!important;}
.single .jiedu-single__header{padding:24px 26px!important;border-radius:18px!important;box-shadow:0 10px 26px rgba(15,36,55,.06)!important;}
.single .jiedu-breadcrumb{font-size:13px!important;margin-bottom:10px!important;}
.single .jiedu-kicker{font-size:12px!important;padding:6px 10px!important;margin-bottom:10px!important;}
.single .jiedu-single__title{font-size:clamp(26px,3vw,36px)!important;line-height:1.22!important;letter-spacing:-.02em!important;margin:0 0 12px!important;}
.single .jiedu-single__summary{font-size:16px!important;line-height:1.65!important;}
.single .jiedu-single__meta{margin-top:14px!important;gap:8px!important;}
.single .jiedu-meta-pill{font-size:12px!important;padding:6px 10px!important;}
.single .jiedu-single__help{margin-top:14px!important;padding:12px 14px!important;border-radius:12px!important;}
.single .jiedu-single__content-wrap{margin-top:0!important;}
.single .entry-content,.single .jiedu-prose{font-size:16.5px!important;line-height:1.82!important;}
.single .entry-content h1,.single .jiedu-prose h1{font-size:clamp(26px,3vw,34px)!important;line-height:1.25!important;margin:1.35em 0 .55em!important;}
.single .entry-content h2,.single .jiedu-prose h2{font-size:clamp(22px,2.2vw,28px)!important;line-height:1.32!important;margin:1.35em 0 .55em!important;}
.single .entry-content h3,.single .jiedu-prose h3{font-size:clamp(19px,1.8vw,23px)!important;line-height:1.38!important;margin:1.15em 0 .45em!important;}
.single .entry-content h4,.single .jiedu-prose h4{font-size:18px!important;line-height:1.45!important;}
.single .jiedu-section-title{font-size:24px!important;line-height:1.3!important;}