/* ══ ARTICLE HERO ══ */
.art-hero {
  background: var(--bg2);
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--line);
  position: relative; overflow: hidden;
}
.art-hero::before {
  content: '';
  position: absolute; top: -80px; right: -60px;
  width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, rgba(185,208,67,.07) 0%, transparent 65%);
  pointer-events: none;
}
.w { max-width: 1320px; margin: 0 auto; padding: 0 28px; }

/* breadcrumb */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--t3); margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--t3); text-decoration: none; transition: color .2s; }
.breadcrumb a:hover { color: var(--p); }
.breadcrumb-sep { opacity: .4; }
.breadcrumb-cur { color: var(--t2); }

/* category + meta */
.art-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.art-cat {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  padding: 5px 14px; border-radius: 100px;
}
.cat-news { background: rgba(255,200,60,.10); color: #ffc83c; border: 1px solid rgba(255,200,60,.2); }
.cat-article { background: rgba(185,208,67,.10); color: var(--p); border: 1px solid rgba(185,208,67,.2); }
.art-date { font-size: 13px; color: var(--t3); display: flex; align-items: center; gap: 5px; }
.art-date svg { width: 13px; height: 13px; opacity: .5; }
.art-read { font-size: 13px; color: var(--t3); display: flex; align-items: center; gap: 5px; }
.art-read svg { width: 13px; height: 13px; opacity: .5; }
.art-meta-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--t3); opacity: .4; }

/* headline */
.art-title {
  font-family: var(--fD);
  font-size: clamp(28px, 3.8vw, 52px);
  line-height: 1.0; letter-spacing: .02em;
  color: var(--t1); margin-bottom: 20px;
  max-width: 820px;
}
.art-lead {
  font-size: 17px; color: var(--t2); line-height: 1.75;
  max-width: 720px; margin-bottom: 28px;
  border-left: 3px solid var(--p);
  padding-left: 20px;
}
.art-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.art-tag {
  background: rgba(255,255,255,.04); border: 1px solid var(--line);
  border-radius: 100px; padding: 5px 14px;
  font-size: 12px; color: var(--t3);
  text-decoration: none;
  transition: border-color .2s, color .2s, background .2s;
}
.art-tag:hover {
  border-color: rgba(185,208,67,.25); color: var(--t1);
  background: rgba(185,208,67,.05);
}

/* ══ MAIN LAYOUT ══ */
.art-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 56px;
  padding: 52px 35px;
  align-items: start;
}

/* ── ARTICLE CONTENT ── */
.art-content { min-width: 0; }

/* cover image placeholder */
.art-cover {
  width: 100%; aspect-ratio: 16/7;
  background: var(--bg3);
  border-radius: 16px; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  font-size: 64px; opacity: .15;
  margin-bottom: 44px;
  border: 1px solid var(--line);
  user-select: none;
  position: relative;
}
.art-cover::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(185,208,67,.04) 0%, transparent 50%);
}

/* typography */
.art-body { font-size: 16px; color: var(--t2); line-height: 1.85; }
.art-body h2 {
  font-family: var(--fD); font-size: clamp(22px, 2.5vw, 30px);
  color: var(--t1); margin: 44px 0 16px; letter-spacing: .02em;
  scroll-margin-top: 88px;
}
.art-body h3 {
  font-size: 18px; font-weight: 700;
  color: var(--t1); margin: 3px 0 12px;
  scroll-margin-top: 88px;
}
.art-body p { margin-bottom: 20px; }
.art-body p:last-child { margin-bottom: 0; }
.art-body a { color: var(--p); text-decoration: none; border-bottom: 1px solid rgba(185,208,67,.3); transition: border-color .2s; }
.art-body a:hover { border-color: var(--p); }
.art-body strong { color: var(--t1); font-weight: 700; }
.art-body ul, .art-body ol {
  margin: 0 0 20px 0; padding: 0;
  list-style: none; display: flex; flex-direction: column; gap: 10px;
}
.art-body ul li, .art-body ol li {
  display: flex; gap: 12px; align-items: flex-start;
  font-size: 15px; line-height: 1.65;
}
.art-body ul li::before {
  content: ''; flex-shrink: 0;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--p); margin-top: 8px;
}
.art-body ol { counter-reset: n; }
.art-body ol li::before {
  counter-increment: n;
  content: counter(n);
  flex-shrink: 0; width: 22px; height: 22px;
  border-radius: 50%; background: rgba(185,208,67,.12);
  border: 1px solid rgba(185,208,67,.25);
  font-size: 11px; font-weight: 700; color: var(--p);
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}

/* blockquote */
.art-body blockquote {
  margin: 32px 0; padding: 20px 24px;
  background: rgba(185,208,67,.05);
  border-left: 3px solid var(--p);
  border-radius: 0 10px 10px 0;
  font-size: 16px; color: var(--t1); font-style: italic; line-height: 1.7;
}

/* callout box */
.art-callout {
  margin: 32px 0; padding: 20px 24px;
  background: var(--surf); border: 1px solid var(--line);
  border-radius: 12px;
  display: flex; gap: 16px; align-items: flex-start;
}
.art-callout-ico { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.art-callout-body { font-size: 14px; color: var(--t2); line-height: 1.7; }
.art-callout-body strong { color: var(--t1); }

/* image in content */
.art-img {
  width: 100%; border-radius: 12px; overflow: hidden;
  background: var(--bg3); border: 1px solid var(--line);
  aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center;
  font-size: 40px; opacity: .15; margin: 28px 0;
  user-select: none;
}
.art-img-caption {
  font-size: 13px; color: var(--t3); text-align: center;
  margin: -20px 0 28px; font-style: italic;
}

/* share + author */
.art-footer {
  margin-top: 52px; padding-top: 32px;
  border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 20px;
}
.art-author {
  display: flex; align-items: center; gap: 14px;
}
.art-author-ava {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(185,208,67,.12); border: 2px solid rgba(185,208,67,.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.art-author-name { font-size: 14px; font-weight: 600; color: var(--t1); }
.art-author-role { font-size: 12px; color: var(--t3); margin-top: 2px; }

.art-share { display: flex; align-items: center; gap: 10px; }
.art-share-lbl { font-size: 13px; color: var(--t3); }
.share-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--surf); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; text-decoration: none; font-size: 15px;
  transition: border-color .2s, background .2s, transform .2s;
}
.share-btn:hover {
  border-color: rgba(185,208,67,.3);
  background: rgba(185,208,67,.08);
  transform: translateY(-2px);
}

/* ── SIDEBAR ── */
.art-sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 88px; }

/* TOC */
.toc-box {
  background: var(--surf); border: 1px solid var(--line);
  border-radius: 14px; padding: 22px 20px; overflow: hidden;
  position: relative;
}
.toc-box::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--p), var(--pd));
}
.toc-title {
  font-family: var(--fH); font-size: 10px; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--p); margin-bottom: 16px;
  display: flex; align-items: center; gap: 6px;
}
.toc-title::before { content: ''; width: 16px; height: 2px; background: var(--p); border-radius: 2px; }
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.toc-item a {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 7px 10px; border-radius: 8px;
  font-size: 13px; color: var(--t2); text-decoration: none;
  transition: background .2s, color .2s;
  line-height: 1.45;
}
.toc-item a:hover { background: rgba(185,208,67,.07); color: var(--t1); }
.toc-item.active a { background: rgba(185,208,67,.10); color: var(--p); font-weight: 600; }
.toc-num { font-family: var(--fD); font-size: 11px; color: rgba(185,208,67,.4); flex-shrink: 0; margin-top: 1px; }
.toc-item.sub a { padding-left: 28px; font-size: 12px; }

/* progress */
.toc-progress-wrap {
  margin-top: 16px; padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
}
.toc-progress-bar {
  flex: 1; height: 3px; background: rgba(255,255,255,.07);
  border-radius: 2px; overflow: hidden;
}
.toc-progress-fill {
  height: 100%; width: 35%; background: linear-gradient(90deg, var(--p), var(--pd));
  border-radius: 2px; transition: width .3s ease;
}
.toc-progress-lbl { font-size: 11px; color: var(--t3); white-space: nowrap; }

/* sidebar CTA */
.sidebar-cta {
  background: linear-gradient(135deg, var(--bg2), var(--surf));
  border: 1px solid rgba(185,208,67,.15);
  border-radius: 14px; padding: 22px 20px; text-align: center;
}
.sidebar-cta-ico { font-size: 28px; margin-bottom: 10px; }
.sidebar-cta-title {
  font-family: var(--fD); font-size: 18px; color: var(--t1);
  letter-spacing: .02em; margin-bottom: 8px;
}
.sidebar-cta-desc { font-size: 13px; color: var(--t2); line-height: 1.6; margin-bottom: 16px; }
.sidebar-cta-btn {
  display: block; width: 100%;
  background: var(--p); color: #000;
  font-family: var(--fH); font-size: 12px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  padding: 12px; border-radius: 8px; border: none;
  cursor: pointer; text-decoration: none;
  transition: background .2s, transform .15s;
}
.sidebar-cta-btn:hover { background: #cde048; transform: translateY(-2px); }