/* 科普界 - 前端样式 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg-deep: #060a14;
  --bg-primary: #0a0f1e;
  --bg-card: #0f1628;
  --bg-card-hover: #141c35;
  --bg-surface: #1a2340;
  --border: rgba(0, 212, 170, 0.12);
  --border-strong: rgba(0, 212, 170, 0.25);
  --cyan: #00d4aa;
  --cyan-dim: #00a888;
  --blue: #3b82f6;
  --gold: #f0c040;
  --text: #e8ecf4;
  --text-secondary: #8892a8;
  --text-dim: #556080;
  --danger: #ef4444;
  --radius: 8px;
  --radius-lg: 14px;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: #40e8c4; }

.grid-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,212,170,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,170,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 1; }

/* NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(6,10,20,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo-icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-family: 'Orbitron', sans-serif; font-weight: 900; font-size: 16px;
  color: var(--bg-deep);
}
.nav-logo-text {
  font-weight: 900; font-size: 1.15rem;
  background: linear-gradient(135deg, var(--cyan), #40e8c4);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-logo-sub { font-size: 0.65rem; color: var(--text-dim); letter-spacing: 0.15em; text-transform: uppercase; margin-top: -2px; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { font-size: 0.88rem; color: var(--text-secondary); font-weight: 500; }
.nav-links a:hover { color: var(--cyan); }
.nav-cta {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 18px; border-radius: 6px;
  background: linear-gradient(135deg, var(--cyan), var(--cyan-dim));
  color: var(--bg-deep) !important; font-weight: 700; font-size: 0.82rem;
}

/* HERO */
.hero { padding: 140px 0 80px; }
.hero-content { display: grid; grid-template-columns: 1fr 320px; gap: 4rem; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 14px; border-radius: 20px;
  border: 1px solid var(--border-strong);
  background: rgba(0,212,170,0.06);
  font-size: 0.78rem; color: var(--cyan); font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 900; line-height: 1.25;
  margin-bottom: 1.2rem;
}
.hero h1 .accent {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc { font-size: 1.05rem; color: var(--text-secondary); max-width: 520px; margin-bottom: 2rem; line-height: 1.8; }
.hero-stats { display: flex; gap: 2.5rem; margin-bottom: 2rem; }
.hero-stat-num { font-family: 'Orbitron', sans-serif; font-size: 1.8rem; font-weight: 900; color: var(--cyan); line-height: 1; }
.hero-stat-label { font-size: 0.78rem; color: var(--text-dim); margin-top: 4px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan), var(--cyan-dim));
  color: var(--bg-deep); font-weight: 700; font-size: 0.9rem;
  border: none; cursor: pointer;
}
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: transparent; color: var(--cyan);
  font-weight: 600; font-size: 0.9rem;
}

.hero-qr {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  text-align: center;
}
.hero-qr-title { font-size: 0.82rem; font-weight: 700; color: var(--cyan); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem; }
.hero-qr-img { width: 160px; height: 160px; margin: 0 auto 1rem; background: #fff; border-radius: 10px; padding: 10px; display: flex; align-items: center; justify-content: center; }
.hero-qr-label { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.3rem; }
.hero-qr-sub { font-size: 0.75rem; color: var(--text-dim); }

/* TICKER */
.ticker-section { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(0,212,170,0.02); padding: 12px 0; overflow: hidden; }
.ticker-inner { display: flex; align-items: center; gap: 1rem; }
.ticker-label { flex-shrink: 0; padding: 4px 12px; border-radius: 4px; background: var(--cyan); color: var(--bg-deep); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.08em; }
.ticker-track { flex: 1; overflow: hidden; white-space: nowrap; }
.ticker-content { display: inline-flex; gap: 3rem; animation: tickerScroll 40s linear infinite; }
.ticker-content span { font-size: 0.85rem; color: var(--text-secondary); }
.ticker-content span::before { content: '◆'; color: var(--cyan); margin-right: 8px; font-size: 0.5em; }
@keyframes tickerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* SECTION */
.section { padding: 5rem 0; }
.section-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 2.5rem; }
.section-label { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; font-weight: 700; color: var(--cyan); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 0.5rem; }
.section-title { font-size: 1.8rem; font-weight: 900; line-height: 1.3; }
.section-more { font-size: 0.85rem; color: var(--text-dim); font-weight: 500; }
.section-more:hover { color: var(--cyan); }

/* ARTICLES */
.articles-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.article-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: transform .2s, border-color .2s; cursor: pointer; }
.article-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.article-card.featured { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; }
.article-cover { height: 200px; background: linear-gradient(135deg, var(--bg-surface), var(--bg-card)); position: relative; overflow: hidden; }
.article-card.featured .article-cover { height: 100%; min-height: 280px; }
.article-cover-pattern { position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(0,212,170,0.15) 0%, transparent 50%), radial-gradient(circle at 70% 30%, rgba(59,130,246,0.1) 0%, transparent 40%); }
.article-cover-icon { position: absolute; bottom: 20px; left: 20px; font-size: 3rem; opacity: 0.6; }
.article-tag { position: absolute; top: 14px; left: 14px; padding: 3px 10px; border-radius: 4px; font-size: 0.7rem; font-weight: 700; background: rgba(0,212,170,0.9); color: var(--bg-deep); }
.article-tag.policy { background: rgba(59,130,246,0.9); color: #fff; }
.article-tag.event { background: rgba(240,192,64,0.9); color: var(--bg-deep); }
.article-tag.industry { background: rgba(0,212,170,0.9); color: var(--bg-deep); }
.article-tag.theory { background: rgba(168,85,247,0.9); color: #fff; }
.article-body { padding: 1.5rem; }
.article-title { font-size: 1.05rem; font-weight: 700; line-height: 1.5; margin-bottom: 0.6rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card.featured .article-title { font-size: 1.3rem; }
.article-excerpt { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 1rem; }
.article-meta { display: flex; align-items: center; gap: 1rem; font-size: 0.78rem; color: var(--text-dim); }
.article-meta-item { display: flex; align-items: center; gap: 4px; }

/* TOPICS */
.topics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.topic-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; text-align: center; transition: all .2s; cursor: pointer; }
.topic-card:hover { border-color: var(--border-strong); background: var(--bg-card-hover); }
.topic-icon { width: 56px; height: 56px; border-radius: 12px; margin: 0 auto 1rem; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; }
.topic-icon.c1 { background: rgba(0,212,170,0.1); }
.topic-icon.c2 { background: rgba(59,130,246,0.1); }
.topic-icon.c3 { background: rgba(240,192,64,0.1); }
.topic-icon.c4 { background: rgba(168,85,247,0.1); }
.topic-name { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.3rem; }
.topic-count { font-size: 0.78rem; color: var(--text-dim); }

/* RESOURCES */
.resources-section { background: rgba(0,212,170,0.015); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.resources-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.resource-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.8rem; transition: all .2s; }
.resource-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.resource-icon { width: 48px; height: 48px; border-radius: 10px; background: rgba(0,212,170,0.08); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 1rem; }
.resource-title { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.resource-desc { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 1rem; line-height: 1.6; }
.resource-meta { display: flex; align-items: center; justify-content: space-between; }
.resource-size { font-size: 0.78rem; color: var(--text-dim); }
.resource-btn { display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px; border-radius: 6px; border: 1px solid var(--border-strong); background: transparent; color: var(--cyan); font-size: 0.8rem; font-weight: 600; cursor: pointer; }

/* DASHBOARD */
.dashboard-section { background: linear-gradient(180deg, rgba(0,212,170,0.02) 0%, transparent 100%); border-top: 1px solid var(--border); }
.dashboard-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.dash-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.dash-label { font-size: 0.78rem; color: var(--text-dim); margin-bottom: 0.5rem; }
.dash-value { font-family: 'Orbitron', sans-serif; font-size: 2rem; font-weight: 900; background: linear-gradient(135deg, var(--cyan), var(--blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
.dash-change { font-size: 0.78rem; color: var(--cyan); margin-top: 0.3rem; }

/* CTA */
.cta-band { padding: 4rem 0; text-align: center; }
.cta-band h2 { font-size: 1.6rem; font-weight: 900; margin-bottom: 0.8rem; }
.cta-band p { color: var(--text-secondary); margin-bottom: 2rem; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-qr-row { display: flex; align-items: center; justify-content: center; }
.cta-qr-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; text-align: center; }
.cta-qr-img { width: 140px; height: 140px; margin: 0 auto 0.8rem; background: #fff; border-radius: 8px; padding: 8px; display: flex; align-items: center; justify-content: center; }
.cta-qr-label { font-size: 0.85rem; font-weight: 600; }
.cta-qr-sub { font-size: 0.75rem; color: var(--text-dim); margin-top: 2px; }

/* FOOTER */
.footer { border-top: 1px solid var(--border); padding: 3rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 2.5rem; }
.footer-brand-desc { font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.8rem; line-height: 1.7; }
.footer-col-title { font-size: 0.78rem; font-weight: 700; color: var(--text-dim); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { font-size: 0.88rem; color: var(--text-secondary); }
.footer-links a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 1.5rem; display: flex; align-items: center; justify-content: space-between; font-size: 0.78rem; color: var(--text-dim); }

/* MODAL */
.modal-overlay { position: fixed; inset: 0; z-index: 200; background: rgba(6,10,20,0.85); backdrop-filter: blur(8px); display: none; align-items: center; justify-content: center; }
.modal-overlay.active { display: flex; }
.modal { background: var(--bg-card); border: 1px solid var(--border-strong); border-radius: var(--radius-lg); padding: 2.5rem; max-width: 420px; width: 90%; text-align: center; }
.modal-close { position: absolute; top: 12px; right: 14px; background: none; border: none; color: var(--text-dim); font-size: 1.2rem; cursor: pointer; }
.modal h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 0.5rem; }
.modal p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 1.5rem; }
.modal-qr { width: 180px; height: 180px; margin: 0 auto 1rem; background: #fff; border-radius: 10px; padding: 12px; display: flex; align-items: center; justify-content: center; }
.modal-hint { font-size: 0.82rem; color: var(--text-dim); }

/* PAGE HEADER */
.page-header { padding: 120px 0 40px; border-bottom: 1px solid var(--border); }
.page-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-dim); margin-bottom: 1rem; }
.page-breadcrumb a { color: var(--text-secondary); }
.page-title { font-size: 2rem; font-weight: 900; margin-bottom: 0.5rem; }
.page-desc { font-size: 0.95rem; color: var(--text-secondary); }

/* FILTER */
.filter-bar { padding: 1.5rem 0; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.filter-label { font-size: 0.82rem; color: var(--text-dim); font-weight: 600; }
.filter-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-tag { padding: 5px 14px; border-radius: 20px; border: 1px solid var(--border); background: transparent; color: var(--text-secondary); font-size: 0.82rem; font-weight: 500; transition: all .2s; }
.filter-tag:hover, .filter-tag.active { border-color: var(--cyan); background: rgba(0,212,170,0.08); color: var(--cyan); }
.filter-search { margin-left: auto; display: flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-card); }
.filter-search input { background: transparent; border: none; outline: none; color: var(--text); font-size: 0.85rem; width: 160px; }

/* ARTICLES LIST */
.articles-section { padding: 2.5rem 0; }
.articles-list { display: flex; flex-direction: column; gap: 1.2rem; }
.article-item { display: grid; grid-template-columns: 200px 1fr; gap: 1.5rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: all .2s; }
.article-item:hover { border-color: var(--border-strong); transform: translateX(4px); }
.article-item-cover { height: 160px; background: linear-gradient(135deg, var(--bg-surface), var(--bg-card)); position: relative; overflow: hidden; }
.article-item-cover-pattern { position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(0,212,170,0.12) 0%, transparent 50%), radial-gradient(circle at 70% 30%, rgba(59,130,246,0.08) 0%, transparent 40%); }
.article-item-cover-icon { position: absolute; bottom: 15px; left: 15px; font-size: 2.5rem; opacity: 0.5; }
.article-item-body { padding: 1.5rem 1.5rem 1.5rem 0; display: flex; flex-direction: column; justify-content: center; }
.article-item-title { font-size: 1.1rem; font-weight: 700; line-height: 1.5; margin-bottom: 0.5rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-item-excerpt { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 1rem; }
.article-item-meta { display: flex; align-items: center; gap: 1rem; font-size: 0.78rem; color: var(--text-dim); }
.article-item-meta-item { display: flex; align-items: center; gap: 4px; }

/* PAGINATION */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 3rem 0; }
.pagination-btn { padding: 8px 14px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-card); color: var(--text-secondary); font-size: 0.85rem; font-weight: 500; transition: all .2s; }
.pagination-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.pagination-btn.active { background: var(--cyan); border-color: var(--cyan); color: var(--bg-deep); font-weight: 700; }

/* ARTICLE DETAIL */
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 3rem; padding-top: 100px; padding-bottom: 4rem; }
.article-header { padding: 2rem 0 1.5rem; border-bottom: 1px solid var(--border); margin-bottom: 2rem; }
.article-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-dim); margin-bottom: 1.2rem; }
.article-breadcrumb a { color: var(--text-secondary); }
.article-h1 { font-size: 1.8rem; font-weight: 900; line-height: 1.4; margin-bottom: 1rem; }
.article-meta-bar { display: flex; align-items: center; gap: 1.5rem; font-size: 0.82rem; color: var(--text-dim); flex-wrap: wrap; }
.article-meta-item { display: flex; align-items: center; gap: 5px; }
.article-content { font-size: 1rem; line-height: 2; color: var(--text); }
.article-content p { margin-bottom: 1.5rem; }
.article-content h2 { font-size: 1.35rem; font-weight: 800; margin: 2.5rem 0 1rem; padding-left: 14px; border-left: 3px solid var(--cyan); }
.article-content h3 { font-size: 1.15rem; font-weight: 700; margin: 2rem 0 0.8rem; color: var(--cyan); }
.article-footer { border-top: 1px solid var(--border); padding-top: 1.5rem; margin-top: 2rem; }
.article-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 1.5rem; }
.article-tags span { padding: 4px 12px; border-radius: 20px; border: 1px solid var(--border); font-size: 0.78rem; color: var(--text-secondary); }
.article-share { display: flex; align-items: center; gap: 1rem; padding: 1rem 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.article-share-label { font-size: 0.82rem; color: var(--text-dim); }
.share-btns { display: flex; gap: 8px; }
.share-btn { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--border); background: var(--bg-card); display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 0.9rem; }

/* SIDEBAR */
.sidebar { position: sticky; top: 84px; align-self: start; }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; margin-bottom: 1.5rem; }
.sidebar-card-title { font-size: 0.82rem; font-weight: 700; color: var(--text-dim); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--border); }
.sidebar-qr { text-align: center; }
.sidebar-qr-img { width: 140px; height: 140px; margin: 0 auto 0.8rem; background: #fff; border-radius: 8px; padding: 8px; display: flex; align-items: center; justify-content: center; }
.sidebar-qr-label { font-size: 0.88rem; font-weight: 600; margin-bottom: 0.2rem; }
.sidebar-qr-sub { font-size: 0.75rem; color: var(--text-dim); }
.sidebar-related-item { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.03); cursor: pointer; }
.sidebar-related-item:last-child { border-bottom: none; }
.sidebar-related-num { font-family: 'Orbitron', sans-serif; font-size: 1.1rem; font-weight: 900; color: var(--text-dim); min-width: 24px; }
.sidebar-related-num.hot { color: var(--cyan); }
.sidebar-related-title { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* RECOMMEND */
.recommend-section { border-top: 1px solid var(--border); padding: 2.5rem 0; }
.recommend-title { font-size: 1.1rem; font-weight: 800; margin-bottom: 1.5rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--border); }
.recommend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.recommend-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: all .2s; }
.recommend-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.recommend-card-cover { height: 120px; background: linear-gradient(135deg, var(--bg-surface), var(--bg-card)); position: relative; }
.recommend-card-cover-pattern { position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(0,212,170,0.1) 0%, transparent 50%); }
.recommend-card-body { padding: 1rem; }
.recommend-card-title { font-size: 0.88rem; font-weight: 600; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 0.5rem; }
.recommend-card-meta { font-size: 0.75rem; color: var(--text-dim); }

/* COLUMNS */
.columns-section { padding: 2rem 0 4rem; }
.columns-section-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 2rem; }
.columns-section-label { font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; font-weight: 700; color: var(--cyan); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 0.5rem; }
.columns-section-title { font-size: 1.5rem; font-weight: 900; }
.columns-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.column-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; transition: all .25s; cursor: pointer; }
.column-card:hover { border-color: var(--border-strong); transform: translateY(-4px); }
.column-card-icon { width: 56px; height: 56px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 1.2rem; }
.column-card-icon.policy { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2); }
.column-card-icon.industry { background: rgba(0,212,170,0.1); border: 1px solid rgba(0,212,170,0.2); }
.column-card-icon.event { background: rgba(240,192,64,0.1); border: 1px solid rgba(240,192,64,0.2); }
.column-card-icon.theory { background: rgba(168,85,247,0.1); border: 1px solid rgba(168,85,247,0.2); }
.column-card-name { font-size: 1.15rem; font-weight: 800; margin-bottom: 0.5rem; }
.column-card-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 1.2rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.column-card-stats { display: flex; gap: 1.2rem; font-size: 0.78rem; color: var(--text-dim); padding-top: 1rem; border-top: 1px solid var(--border); }
.column-card-stat { display: flex; align-items: center; gap: 4px; }
.column-card-stat strong { color: var(--text-secondary); font-weight: 700; }

.column-detail-section { padding: 2rem 0 4rem; }
.column-detail { margin-bottom: 3.5rem; }
.column-detail-header { display: flex; align-items: center; gap: 1.2rem; margin-bottom: 1.5rem; padding-bottom: 1.2rem; border-bottom: 1px solid var(--border); }
.column-detail-icon { width: 48px; height: 48px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
.column-detail-icon.policy { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2); }
.column-detail-icon.industry { background: rgba(0,212,170,0.1); border: 1px solid rgba(0,212,170,0.2); }
.column-detail-icon.event { background: rgba(240,192,64,0.1); border: 1px solid rgba(240,192,64,0.2); }
.column-detail-icon.theory { background: rgba(168,85,247,0.1); border: 1px solid rgba(168,85,247,0.2); }
.column-detail-info h3 { font-size: 1.2rem; font-weight: 800; }
.column-detail-info p { font-size: 0.82rem; color: var(--text-dim); margin-top: 2px; }
.column-detail-more { margin-left: auto; font-size: 0.82rem; color: var(--text-dim); display: flex; align-items: center; gap: 4px; }
.column-detail-more:hover { color: var(--cyan); }
.column-articles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.column-article-item { display: flex; gap: 1rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem; transition: all .2s; cursor: pointer; }
.column-article-item:hover { border-color: var(--border-strong); background: var(--bg-card-hover); }
.column-article-num { font-family: 'Orbitron', sans-serif; font-size: 1.4rem; font-weight: 900; color: var(--text-dim); min-width: 32px; line-height: 1; padding-top: 2px; }
.column-article-item:first-child .column-article-num { color: var(--cyan); }
.column-article-body { flex: 1; }
.column-article-title { font-size: 0.92rem; font-weight: 600; line-height: 1.5; margin-bottom: 0.4rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.column-article-meta { font-size: 0.75rem; color: var(--text-dim); display: flex; align-items: center; gap: 0.8rem; }

.page-stats { display: flex; gap: 2.5rem; margin-top: 1.5rem; }
.page-stat-num { font-family: 'Orbitron', sans-serif; font-size: 1.5rem; font-weight: 900; color: var(--cyan); line-height: 1; }
.page-stat-label { font-size: 0.75rem; color: var(--text-dim); margin-top: 4px; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-qr { max-width: 320px; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-card.featured { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr; }
  .topics-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .recommend-grid { grid-template-columns: 1fr; }
  .columns-grid { grid-template-columns: repeat(2, 1fr); }
  .column-articles { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .container { padding: 0 1.2rem; }
  .hero { padding: 110px 0 50px; }
  .hero-stats { gap: 1.5rem; }
  .topics-grid { grid-template-columns: 1fr 1fr; }
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .cta-qr-row { flex-direction: column; gap: 1.5rem; }
  .article-item { grid-template-columns: 1fr; }
  .article-item-cover { height: 180px; }
  .article-item-body { padding: 1.5rem; }
  .columns-grid { grid-template-columns: 1fr; }
  .page-stats { flex-wrap: wrap; gap: 1.5rem; }
}