:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --accent: #f59e0b;
  --accent-hot: #ef4444;
  --accent-green: #10b981;
  --bg: #0a0a0f;
  --bg-card: #13131a;
  --bg-card2: #1a1a24;
  --border: rgba(99,102,241,0.18);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-card: 0 2px 16px rgba(0,0,0,0.3);
  --glow: 0 0 40px rgba(99,102,241,0.15);
  --font-sans: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ====== SCROLLBAR ====== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 99px; }

/* ====== HEADER ====== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(10,10,15,0.97);
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  white-space: nowrap;
}

.logo-icon { font-size: 1.4rem; }

.logo-accent {
  color: var(--primary-light);
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
}

.main-nav a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.main-nav a:hover, .main-nav a.active {
  color: var(--text);
  background: rgba(99,102,241,0.12);
}

.main-nav a.active {
  color: var(--primary-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.live-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--accent-green);
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  padding: 4px 10px;
  border-radius: 99px;
  white-space: nowrap;
}

.live-badge .dot {
  width: 7px; height: 7px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ====== HERO ====== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(99,102,241,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(245,158,11,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(99,102,241,0.05) 0%, transparent 70%);
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.3);
  color: #fca5a5;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 99px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 50%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 36px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-light);
  letter-spacing: -1px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ====== BUTTONS ====== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99,102,241,0.5);
}

.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--primary);
}

/* ====== CODE WINDOW ====== */
.code-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--glow), var(--shadow);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border);
}

.code-window-bar .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}

.code-window-bar .red { background: #ff5f57; }
.code-window-bar .yellow { background: #ffbd2e; }
.code-window-bar .green { background: #28c840; }

.code-window-title {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-left: 8px;
  font-family: 'Inter', monospace;
}

.code-content {
  padding: 20px;
  min-height: 320px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.82rem;
}

.code-loading {
  color: var(--text-dim);
  animation: blink 1.5s infinite;
  padding: 20px 0;
}

@keyframes blink {
  50% { opacity: 0.4; }
}

.code-repo-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.code-repo-item:last-child { border-bottom: none; }

.repo-rank {
  min-width: 24px;
  font-size: 0.75rem;
  color: var(--primary-light);
  font-weight: 700;
  opacity: 0.7;
  padding-top: 2px;
}

.repo-info { flex: 1; overflow: hidden; }

.repo-name {
  color: var(--primary-light);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.repo-desc {
  color: var(--text-dim);
  font-size: 0.75rem;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.repo-stars {
  color: var(--accent);
  font-size: 0.75rem;
  white-space: nowrap;
}

/* ====== SECTION ====== */
.section {
  padding: 80px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
  gap: 20px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.section-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 6px;
}

.view-all {
  color: var(--primary-light);
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 6px 14px;
  border-radius: 8px;
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.2);
  transition: var(--transition);
}

.view-all:hover {
  background: rgba(99,102,241,0.18);
  border-color: var(--primary);
}

/* ====== TRENDING GRID ====== */
.trending-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.trending-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.trending-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.06), transparent);
  opacity: 0;
  transition: var(--transition);
}

.trending-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--glow), var(--shadow-card);
}

.trending-card:hover::before { opacity: 1; }

.card-rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 12px;
}

.card-rank.top3 {
  background: rgba(245,158,11,0.15);
  border-color: rgba(245,158,11,0.35);
  color: var(--accent);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
  transition: var(--transition);
}

.trending-card:hover .card-title { color: var(--primary-light); }

.card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.card-tag {
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 5px;
  font-weight: 600;
  background: rgba(99,102,241,0.1);
  color: var(--primary-light);
  border: 1px solid rgba(99,102,241,0.2);
}

.card-stars {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
}

.card-trend {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
  color: var(--accent-green);
  font-weight: 600;
  margin-left: auto;
}

/* ====== SKELETON ====== */
.loading-skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
  width: 100%;
}

.skeleton-card {
  height: 160px;
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card2) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  border-radius: var(--radius);
  animation: shimmer 1.5s infinite;
  border: 1px solid var(--border);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ====== ARTICLES ====== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--glow), var(--shadow-card);
}

.article-cover {
  height: 180px;
  background: linear-gradient(135deg, var(--bg-card2), var(--bg));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  position: relative;
  overflow: hidden;
}

.article-cover-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(245,158,11,0.1));
}

.article-body { padding: 20px; }

.article-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  margin-bottom: 10px;
  background: rgba(239,68,68,0.12);
  color: #fca5a5;
  border: 1px solid rgba(239,68,68,0.25);
}

.article-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  transition: var(--transition);
}

.article-card:hover .article-title { color: var(--primary-light); }

.article-excerpt {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.article-date { }

.article-read {
  color: var(--primary-light);
  font-weight: 600;
}

/* ====== TOOLS ====== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
  cursor: pointer;
}

.tool-card:hover {
  border-color: var(--primary);
  background: var(--bg-card2);
  transform: translateX(4px);
}

.tool-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(99,102,241,0.05));
  border: 1px solid rgba(99,102,241,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.tool-info { flex: 1; min-width: 0; }

.tool-name {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 3px;
}

.tool-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-badge {
  font-size: 0.68rem;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 700;
  background: rgba(16,185,129,0.12);
  color: #6ee7b7;
  border: 1px solid rgba(16,185,129,0.25);
  white-space: nowrap;
}

/* ====== SUBSCRIBE ====== */
.subscribe-section {
  padding: 60px 0;
}

.subscribe-card {
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(245,158,11,0.05));
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: var(--radius-lg);
  padding: 52px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  overflow: hidden;
}

.subscribe-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(99,102,241,0.15), transparent 70%);
  pointer-events: none;
}

.subscribe-content { flex: 1; }

.subscribe-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.subscribe-content p {
  color: var(--text-muted);
  margin-bottom: 24px;
  max-width: 500px;
}

.subscribe-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.subscribe-form input {
  flex: 1;
  min-width: 240px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font-sans);
  outline: none;
  transition: var(--transition);
}

.subscribe-form input:focus {
  border-color: var(--primary);
  background: rgba(99,102,241,0.06);
}

.subscribe-form input::placeholder { color: var(--text-dim); }

.subscribe-form button {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.subscribe-form button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.4);
}

.subscribe-note {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 12px;
}

.subscribe-visual {
  font-size: 4rem;
  flex-shrink: 0;
  animation: float 4s ease-in-out infinite;
}

/* ====== TIMELINE ====== */
.timeline {
  position: relative;
  padding-left: 24px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), transparent);
}

.timeline-item {
  position: relative;
  padding: 0 0 28px 28px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -17px; top: 6px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

.timeline-date {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* ====== FOOTER ====== */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo { margin-bottom: 14px; }

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 260px;
}

.social-links {
  display: flex;
  gap: 10px;
}

.social-links a {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-links a:hover {
  background: rgba(99,102,241,0.15);
  border-color: var(--primary);
}

.social-links svg { width: 16px; height: 16px; }

.footer-links h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links ul { list-style: none; }

.footer-links li { margin-bottom: 10px; }

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-links a:hover { color: var(--primary-light); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-bottom a { color: var(--primary-light); }

/* ====== RESPONSIVE ====== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; max-width: 480px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: block;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
  }
  .main-nav.open ul { flex-direction: column; }
  .menu-toggle { display: flex; }
  .live-badge { display: none; }
  .subscribe-card { flex-direction: column; text-align: center; padding: 32px 24px; }
  .subscribe-visual { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-stats { gap: 20px; }
  .code-window { display: none; }
  .hero .container { grid-template-columns: 1fr; }
  .section-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .trending-grid, .articles-grid, .tools-grid { grid-template-columns: 1fr; }
  .loading-skeleton { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .btn { justify-content: center; }
}

/* ====== HOT PAGE SPECIFIC ====== */
.page-hero {
  padding: 120px 0 60px;
  background: linear-gradient(to bottom, rgba(99,102,241,0.05), transparent);
  border-bottom: 1px solid var(--border);
}

.page-hero-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-hot);
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  padding: 4px 12px;
  border-radius: 99px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.page-title {
  font-size: clamp(1.8rem, 3vw, 3rem);
  font-weight: 900;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.page-desc {
  color: var(--text-muted);
  font-size: 1rem;
}

.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 32px 0;
}

.filter-tab {
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  transition: var(--transition);
}

.filter-tab:hover, .filter-tab.active {
  background: rgba(99,102,241,0.12);
  border-color: var(--primary);
  color: var(--primary-light);
}

.hot-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hot-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 20px;
  align-items: start;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}

.hot-item:hover {
  border-color: var(--primary);
  background: var(--bg-card2);
  transform: translateX(4px);
  box-shadow: var(--glow);
}

.hot-rank {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-dim);
  text-align: center;
  padding-top: 4px;
}

.hot-rank.top1 { color: var(--accent); font-size: 2rem; }
.hot-rank.top2 { color: #d1d5db; font-size: 1.8rem; }
.hot-rank.top3 { color: #cd7f32; font-size: 1.6rem; }

.hot-info {}

.hot-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}

.hot-item:hover .hot-title { color: var(--primary-light); }

.hot-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.6;
}

.hot-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.hot-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 5px;
  background: rgba(99,102,241,0.1);
  color: var(--primary-light);
  border: 1px solid rgba(99,102,241,0.2);
  font-weight: 600;
}

.hot-stats {
  text-align: right;
  flex-shrink: 0;
}

.hot-stars {
  font-size: 0.88rem;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 4px;
}

.hot-trend {
  font-size: 0.78rem;
  color: var(--accent-green);
  font-weight: 600;
}

.hot-lang {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 6px;
}

/* ====== BACK TO TOP ====== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 20px rgba(99,102,241,0.5);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.back-to-top:hover { transform: translateY(-3px); }