/* ==========================================================================
   IPNova Theme — Design Tokens
   代理IP服务 / 数据基础设施 视觉系统
   ========================================================================== */
:root {
  /* Color */
  --bg: #0A0E1A;
  --bg-elevated: #121826;
  --bg-card: #161E2E;
  --bg-card-hover: #1B2436;
  --border: #232D42;
  --border-strong: #303C58;
  --text-primary: #EAF0FA;
  --text-secondary: #8A95AC;
  --text-muted: #5C667D;
  --accent-cyan: #3ED6C6;
  --accent-cyan-dim: rgba(62, 214, 198, 0.14);
  --accent-amber: #FFA94D;
  --accent-amber-dim: rgba(255, 169, 77, 0.14);
  --accent-violet: #6C7CF0;
  --danger: #FF6B6B;
  --success: #4ADE80;

  /* Type */
  --font-display: 'Space Grotesk', 'Noto Sans SC', -apple-system, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;

  /* Layout */
  --container: 1200px;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-glow-cyan: 0 0 40px rgba(62, 214, 198, 0.15);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--font-mono); }

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ---------- Eyebrow / Section heading ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head h2 { font-size: 30px; color: var(--text-primary); }
.section-head p { color: var(--text-secondary); margin-top: 12px; font-size: 15px; }
.section { padding: 88px 0; }
.section--tight { padding: 56px 0; }
.section--alt { background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent-amber); color: #1A1204; }
.btn-primary:hover { box-shadow: 0 6px 24px rgba(255, 169, 77, 0.35); }
.btn-outline { border-color: var(--border-strong); color: var(--text-primary); background: transparent; }
.btn-outline:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }
.btn-ghost { color: var(--text-secondary); }
.btn-ghost:hover { color: var(--accent-cyan); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 14, 26, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 18px; font-weight: 700; }
.brand img { height: 32px; width: auto; }
.brand .dot { color: var(--accent-cyan); }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: color .15s ease, background .15s ease;
}
.main-nav a:hover, .main-nav a.is-active { color: var(--text-primary); background: var(--bg-card); }

.header-actions { display: flex; align-items: center; gap: 10px; }
.header-actions .divider { width: 1px; height: 20px; background: var(--border-strong); margin: 0 4px; }

.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 22px; }

@media (max-width: 960px) {
  .main-nav { position: fixed; top: 72px; left: 0; right: 0; bottom: 0; background: var(--bg); flex-direction: column; align-items: stretch; padding: 20px; gap: 4px; transform: translateX(100%); transition: transform .25s ease; overflow-y: auto; }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav a { padding: 14px 16px; font-size: 16px; }
  .nav-toggle { display: block; }
  .header-actions .btn-outline { display: none; }
}

/* ==========================================================================
   Hero — Signature element: live IP pool matrix
   ========================================================================== */
.hero { position: relative; padding: 76px 0 90px; overflow: hidden; }
.hero::before {
  content: '';
  position: absolute; inset: -20% -10% auto -10%; height: 600px;
  background: radial-gradient(ellipse at top, rgba(62,214,198,0.10), transparent 60%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--border-strong); background: var(--bg-card);
  font-size: 12px; color: var(--text-secondary); margin-bottom: 22px;
}
.hero-badge strong { color: var(--accent-cyan); font-family: var(--font-mono); }
.hero h1 { font-size: 44px; line-height: 1.25; color: var(--text-primary); }
.hero h1 .accent { color: var(--accent-cyan); }
.hero-lead { font-size: 16px; color: var(--text-secondary); margin: 20px 0 32px; max-width: 520px; }
.hero-cta { display: flex; gap: 14px; margin-bottom: 40px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-family: var(--font-mono); font-size: 24px; color: var(--text-primary); }
.hero-stats .stat span { font-size: 13px; color: var(--text-muted); }

/* IP matrix visual */
.ip-visual {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-card), var(--shadow-glow-cyan);
}
.ip-visual-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; padding-bottom: 14px; border-bottom: 1px dashed var(--border); }
.ip-visual-head .title { font-family: var(--font-mono); font-size: 12px; color: var(--text-secondary); display: flex; align-items: center; gap: 8px; }
.ip-visual-head .led { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 6px var(--success); animation: pulse 1.6s infinite; }
.ip-matrix { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.ip-cell {
  font-family: var(--font-mono); font-size: 12.5px; color: var(--text-secondary);
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 9px 10px; display: flex; align-items: center; justify-content: space-between;
  transition: color .3s ease, border-color .3s ease;
}
.ip-cell .status { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-cyan); flex-shrink: 0; }
.ip-cell.is-updating { color: var(--accent-cyan); border-color: var(--accent-cyan); }
.ip-visual-foot { display: flex; justify-content: space-between; margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--border); font-size: 12px; color: var(--text-muted); }
.ip-visual-foot b { color: var(--accent-amber); font-family: var(--font-mono); }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
}

/* ==========================================================================
   Products grid
   ========================================================================== */
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.product-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.product-card:hover { border-color: var(--accent-cyan); transform: translateY(-3px); background: var(--bg-card-hover); }
.product-card .icon { width: 44px; height: 44px; border-radius: var(--radius-sm); background: var(--accent-cyan-dim); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; color: var(--accent-cyan); font-size: 20px; }
.product-card h3 { font-size: 17px; margin-bottom: 8px; }
.product-card p { color: var(--text-secondary); font-size: 13.5px; margin-bottom: 18px; }
.product-card .link { font-size: 13px; color: var(--accent-cyan); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }

/* Numbered tier list (proxy pool spectrum — genuine sequence) */
.tier-list { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.tier-row { display: grid; grid-template-columns: 64px 1.3fr 1.4fr auto; align-items: center; gap: 20px; padding: 22px 26px; border-bottom: 1px solid var(--border); background: var(--bg-card); transition: background .2s ease; }
.tier-row:last-child { border-bottom: none; }
.tier-row:hover { background: var(--bg-card-hover); }
.tier-num { font-family: var(--font-mono); font-size: 22px; color: var(--accent-cyan); opacity: .7; }
.tier-name h4 { font-size: 16px; margin-bottom: 4px; }
.tier-name span { font-size: 12.5px; color: var(--text-muted); font-family: var(--font-mono); }
.tier-desc { color: var(--text-secondary); font-size: 13.5px; }
@media (max-width: 720px) {
  .tier-row { grid-template-columns: 40px 1fr; }
  .tier-desc, .tier-row .btn { grid-column: 2 / 3; }
}

/* Scenario grid */
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.scenario-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; }
.scenario-card .icon { font-size: 24px; margin-bottom: 12px; color: var(--accent-amber); }
.scenario-card h4 { font-size: 14px; font-weight: 600; }
@media (max-width: 900px) { .scenario-grid { grid-template-columns: repeat(2, 1fr); } }

/* Feature tabs */
.feature-layout { display: grid; grid-template-columns: 280px 1fr; gap: 40px; }
.feature-tabs { display: flex; flex-direction: column; gap: 4px; }
.feature-tab { text-align: left; padding: 14px 18px; border-radius: var(--radius-sm); border: 1px solid transparent; color: var(--text-secondary); font-size: 14.5px; font-weight: 500; background: transparent; }
.feature-tab.is-active { background: var(--bg-card); border-color: var(--border); color: var(--text-primary); }
.feature-tab .num { font-family: var(--font-mono); color: var(--accent-cyan); margin-right: 10px; }
.feature-panel { display: none; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 36px; }
.feature-panel.is-active { display: block; }
.feature-panel h3 { font-size: 20px; margin-bottom: 14px; }
.feature-panel p { color: var(--text-secondary); font-size: 14.5px; }
@media (max-width: 860px) {
  .feature-layout { grid-template-columns: 1fr; }
  .feature-tabs { flex-direction: row; overflow-x: auto; }
}

/* Advantages */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { padding: 4px; }
.adv-card .icon { font-size: 26px; color: var(--accent-cyan); margin-bottom: 16px; }
.adv-card h4 { font-size: 16px; margin-bottom: 10px; }
.adv-card p { color: var(--text-secondary); font-size: 13.5px; }
@media (max-width: 900px) { .adv-grid { grid-template-columns: repeat(2, 1fr); } }

/* Client logos marquee */
.logo-strip { overflow: hidden; position: relative; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.logo-track { display: flex; gap: 48px; animation: scroll-left 32s linear infinite; width: max-content; }
.logo-track img { height: 26px; opacity: 0.5; filter: grayscale(1) brightness(2); transition: opacity .2s ease; }
.logo-track img:hover { opacity: 0.9; }
@keyframes scroll-left { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* News grid */
.news-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.news-col-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.news-col-head h3 { font-size: 17px; }
.news-col-head a { font-size: 13px; color: var(--text-secondary); }
.news-list li { border-bottom: 1px dashed var(--border); }
.news-list li:last-child { border-bottom: none; }
.news-list a { display: flex; justify-content: space-between; gap: 16px; padding: 13px 0; font-size: 14px; color: var(--text-primary); }
.news-list a:hover { color: var(--accent-cyan); }
.news-list .title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-list time { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-muted); flex-shrink: 0; }
@media (max-width: 860px) { .news-columns { grid-template-columns: 1fr; } }

/* FAQ */
.faq-list { max-width: 780px; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 15.5px; font-weight: 600; background: none; border: none; width: 100%; color: var(--text-primary); text-align: left; }
.faq-q .plus { font-family: var(--font-mono); color: var(--accent-cyan); transition: transform .2s ease; }
.faq-item.is-open .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; color: var(--text-secondary); font-size: 14px; }
.faq-item.is-open .faq-a { max-height: 320px; padding-bottom: 20px; }

/* CTA band */
.cta-band { background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated)); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 52px; display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h3 { font-size: 24px; margin-bottom: 8px; }
.cta-band p { color: var(--text-secondary); margin: 0; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--bg-elevated); border-top: 1px solid var(--border); padding-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; padding-bottom: 40px; }
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { color: var(--text-secondary); font-size: 13.5px; max-width: 280px; }
.footer-col h5 { font-size: 13.5px; color: var(--text-primary); margin-bottom: 16px; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-secondary); font-size: 13.5px; }
.footer-col a:hover { color: var(--accent-cyan); }
.footer-bottom { border-top: 1px solid var(--border); padding: 22px 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 12.5px; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }
.footer-disclaimer { font-size: 12px; color: var(--text-muted); padding: 18px 0; border-top: 1px dashed var(--border); line-height: 1.8; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ==========================================================================
   Breadcrumb
   ========================================================================== */
.breadcrumb { padding: 20px 0; font-size: 13px; color: var(--text-muted); }
.breadcrumb ol { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.breadcrumb li:not(:last-child)::after { content: '/'; margin-left: 8px; color: var(--border-strong); }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-cyan); }
.breadcrumb li[aria-current] { color: var(--text-primary); }

/* ==========================================================================
   Article / Archive layout
   ========================================================================== */
.content-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
@media (max-width: 960px) { .content-layout { grid-template-columns: 1fr; } }

.article-card, .list-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px;
}
@media (max-width: 640px) { .article-card, .list-card { padding: 22px; } }

.article-head { margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.article-head h1 { font-size: 28px; line-height: 1.4; }
.article-meta { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 16px; font-size: 13px; color: var(--text-muted); font-family: var(--font-mono); }
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }

.article-body { font-size: 15.5px; color: var(--text-primary); }
.article-body h2 { font-size: 22px; margin: 34px 0 16px; color: var(--text-primary); }
.article-body h3 { font-size: 18px; margin: 26px 0 12px; }
.article-body p { color: #C9D2E3; margin-bottom: 1.1em; }
.article-body img { border-radius: var(--radius); margin: 20px 0; }
.article-body ul, .article-body ol { padding-left: 22px; margin-bottom: 1.1em; color: #C9D2E3; }
.article-body li { margin-bottom: 6px; }
.article-body blockquote { border-left: 3px solid var(--accent-cyan); padding: 4px 20px; color: var(--text-secondary); margin: 20px 0; background: var(--bg-elevated); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.article-body code { font-family: var(--font-mono); background: var(--bg-elevated); padding: 2px 6px; border-radius: 4px; font-size: 13.5px; color: var(--accent-cyan); }
.article-body pre { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; overflow-x: auto; }
.article-body a { color: var(--accent-cyan); text-decoration: underline; text-underline-offset: 3px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.article-body table th, .article-body table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-body table th { background: var(--bg-elevated); }

.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.article-tags a { font-size: 12.5px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border-strong); color: var(--text-secondary); }

.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 32px; }
.article-nav a { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.article-nav .label { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.article-nav .title { font-size: 14px; color: var(--text-primary); }
.article-nav .next { text-align: right; }
@media (max-width: 560px) { .article-nav { grid-template-columns: 1fr; } }

/* Sidebar */
.widget { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 26px; margin-bottom: 20px; }
.widget h4 { font-size: 15px; margin-bottom: 18px; display: flex; align-items: center; gap: 8px; }
.widget h4::before { content: ''; width: 4px; height: 14px; background: var(--accent-cyan); border-radius: 2px; }
.widget-list li { padding: 10px 0; border-bottom: 1px dashed var(--border); font-size: 13.5px; }
.widget-list li:last-child { border-bottom: none; }
.widget-list a { color: var(--text-secondary); }
.widget-list a:hover { color: var(--accent-cyan); }
.widget-cta { text-align: center; }
.widget-cta p { color: var(--text-secondary); font-size: 13px; margin-bottom: 16px; }

/* List / archive page */
.post-item { display: flex; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--border); }
.post-item:last-child { border-bottom: none; }
.post-item .post-info { flex: 1; }
.post-item h3 { font-size: 17px; margin-bottom: 8px; }
.post-item h3 a:hover { color: var(--accent-cyan); }
.post-item .excerpt { color: var(--text-secondary); font-size: 13.5px; margin-bottom: 10px; }
.post-item .meta { font-size: 12.5px; color: var(--text-muted); font-family: var(--font-mono); display: flex; gap: 14px; }

.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 36px; }
.pagination a, .pagination span { min-width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-sm); border: 1px solid var(--border); color: var(--text-secondary); font-size: 13.5px; font-family: var(--font-mono); }
.pagination a:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }
.pagination .is-current { background: var(--accent-cyan); border-color: var(--accent-cyan); color: #06201D; font-weight: 700; }

/* Comments */
.comment-form textarea, .comment-form input { width: 100%; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; color: var(--text-primary); font-family: var(--font-body); margin-bottom: 12px; }
.comment-form textarea { min-height: 110px; resize: vertical; }
.comment-item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.comment-item .avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--bg-elevated); flex-shrink: 0; }
.comment-item .author { font-size: 14px; font-weight: 600; }
.comment-item .date { font-size: 12px; color: var(--text-muted); margin-left: 10px; font-family: var(--font-mono); }
.comment-item .text { color: var(--text-secondary); font-size: 13.5px; margin-top: 6px; }

/* Floating consult widget */
.float-widget { position: fixed; right: 24px; bottom: 24px; z-index: 200; display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
.float-btn { width: 52px; height: 52px; border-radius: 50%; background: var(--bg-card); border: 1px solid var(--border-strong); display: flex; align-items: center; justify-content: center; color: var(--accent-cyan); font-size: 20px; box-shadow: var(--shadow-card); position: relative; }
.float-btn.primary { background: var(--accent-amber); color: #1A1204; }
.float-panel { position: absolute; right: 62px; bottom: 0; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; width: 200px; text-align: center; display: none; box-shadow: var(--shadow-card); }
.float-btn:hover .float-panel { display: block; }
.float-panel img { border-radius: var(--radius-sm); margin-bottom: 8px; }
.float-panel p { font-size: 12px; color: var(--text-secondary); margin: 0; }
.back-top { opacity: 0; pointer-events: none; transition: opacity .2s ease; }
.back-top.is-visible { opacity: 1; pointer-events: auto; }

/* 404 */
.error-page { text-align: center; padding: 100px 0; }
.error-page .code { font-family: var(--font-mono); font-size: 100px; color: var(--accent-cyan); opacity: .8; line-height: 1; }
.error-page h2 { margin: 16px 0; font-size: 22px; }
.error-page p { color: var(--text-secondary); margin-bottom: 26px; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Search box */
.search-box { position: relative; margin-bottom: 24px; }
.search-box input { width: 100%; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 11px 16px; color: var(--text-primary); }