/* ==============================================================================
   极速云 (JisuCloud) 官方品牌专属样式 - jsucloud.top
   Electric Cyber Azure & Deep Obsidian Blue · High-Converting Official Portal
   Bing Adapted Favicon System & Exquisite Glassmorphism UI
   ============================================================================== */
:root {
  --bg-main: #060D1A;
  --bg-surface: #0B172C;
  --bg-card: #10213D;
  --bg-card-hover: #162B4E;
  --primary: #0284C7;
  --primary-light: #38BDF8;
  --primary-glow: rgba(56, 189, 248, 0.45);
  --accent: #2563EB;
  --amber: #F59E0B;
  --amber-light: #FBBF24;
  --green: #10B981;
  --text: #F8FAFC;
  --text-dim: #94A3B8;
  --text-muted: #64748B;
  --border: rgba(56, 189, 248, 0.2);
  --border-glow: rgba(56, 189, 248, 0.6);
  --grad-primary: linear-gradient(135deg, #38BDF8 0%, #0284C7 55%, #1D4ED8 100%);
  --grad-gold: linear-gradient(135deg, #FDE047 0%, #F59E0B 100%);
  --grad-card: linear-gradient(180deg, rgba(16, 33, 61, 0.85) 0%, rgba(11, 23, 44, 0.95) 100%);
  --shadow: 0 12px 36px rgba(0, 0, 0, 0.6), 0 0 25px rgba(2, 132, 199, 0.2);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-main);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.68;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.18) 0%, transparent 55%),
    radial-gradient(circle at 92% 35%, rgba(37, 99, 235, 0.1) 0%, transparent 45%),
    radial-gradient(circle at 8% 75%, rgba(2, 132, 199, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.navbar .container { max-width: 1380px; padding: 0 24px; }

/* Navbar */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(6, 13, 26, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}
.navbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: nowrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: #FFF; font-weight: 800; font-size: 1.25rem; white-space: nowrap; flex-shrink: 0; }
.brand-name { background: var(--grad-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.brand-badge { background: rgba(56, 189, 248, 0.15); color: var(--primary-light); border: 1px solid var(--border); padding: 2px 7px; border-radius: 4px; font-size: 0.72rem; font-weight: 700; margin-left: 6px; white-space: nowrap; display: inline-block; }
.nav-links { display: flex; align-items: center; gap: 14px; list-style: none; margin: 0; padding: 0; flex-wrap: nowrap; flex-shrink: 1; }
.nav-links li { white-space: nowrap; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 0.92rem; font-weight: 500; transition: color 0.2s; white-space: nowrap; padding: 4px 2px; }
.nav-links a:hover, .nav-links a.active { color: var(--primary-light); }
.nav-actions { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; white-space: nowrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 18px; border-radius: 8px; font-weight: 600; font-size: 0.92rem;
  text-decoration: none; transition: all 0.25s ease; cursor: pointer; border: none;
  white-space: nowrap; flex-shrink: 0;
}
.btn-primary {
  background: var(--grad-primary); color: #FFF;
  box-shadow: 0 4px 18px var(--primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(56, 189, 248, 0.6);
  color: #FFF;
}
.btn-outline {
  background: rgba(56, 189, 248, 0.08); color: var(--primary-light);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: rgba(56, 189, 248, 0.22); border-color: var(--primary-light); color: #FFF; }

/* Hero */
.hero { padding: 75px 0 55px; text-align: center; position: relative; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(56, 189, 248, 0.12); border: 1px solid var(--border);
  padding: 6px 18px; border-radius: 99px; font-size: 0.85rem; color: var(--primary-light);
  margin-bottom: 22px; font-weight: 600;
}
.badge-live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); display: inline-block; animation: pulseGlow 2s infinite; }
@keyframes pulseGlow { 0% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(1.3); } 100% { opacity: 1; transform: scale(1); } }

.hero h1 { font-size: 2.85rem; line-height: 1.25; margin-bottom: 20px; font-weight: 800; }
.hero-highlight { background: var(--grad-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: 1.15rem; color: var(--text-dim); max-width: 840px; margin: 0 auto 32px; }
.hero-actions { display: flex; justify-content: center; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }

/* Feature Chips */
.feature-chips { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-bottom: 45px; }
.chip {
  background: rgba(2, 132, 199, 0.08); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 6px; font-size: 0.85rem; color: var(--text);
  font-weight: 500;
}

/* Stats Bar */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px; margin: 0 auto 60px; max-width: 1050px;
}
.stat-item { text-align: center; border-right: 1px solid rgba(255,255,255,0.06); }
.stat-item:last-child { border-right: none; }
.stat-val { font-size: 1.9rem; font-weight: 800; color: var(--primary-light); font-family: monospace; }
.stat-lbl { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* Grid / Cards */
.section { padding: 60px 0; }
.section-header { text-align: center; margin-bottom: 44px; }
.section-header h2 { font-size: 2.1rem; font-weight: 700; margin-bottom: 12px; }
.section-header p { font-size: 1.05rem; color: var(--text-dim); max-width: 720px; margin: 0 auto; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.card {
  background: var(--grad-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px; transition: all 0.3s ease;
  position: relative; overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
}
.card-icon {
  width: 50px; height: 50px; border-radius: 12px;
  background: rgba(56, 189, 248, 0.15); color: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 18px;
}
.card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; color: #FFF; }
.card p { font-size: 0.95rem; color: var(--text-dim); line-height: 1.65; }

/* Pricing Cards */
.price-card {
  background: var(--grad-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px 24px; text-align: center;
  display: flex; flex-direction: column; justify-content: space-between;
  transition: all 0.3s; position: relative;
}
.price-card.featured {
  border-color: var(--primary-light);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.3);
  transform: scale(1.03);
}
.price-tag { margin: 20px 0; }
.price-num { font-size: 2.6rem; font-weight: 800; color: #FFF; }
.price-unit { font-size: 0.95rem; color: var(--text-muted); }
.price-features { list-style: none; margin: 20px 0; text-align: left; }
.price-features li { padding: 8px 0; color: var(--text-dim); font-size: 0.92rem; border-bottom: 1px dashed rgba(255,255,255,0.06); }
.price-features li::before { content: "✓ "; color: var(--primary-light); font-weight: bold; margin-right: 6px; }

/* Interactive Details / FAQ Accordion */
.faq-box { display: flex; flex-direction: column; gap: 14px; max-width: 900px; margin: 0 auto; }
.faq-item {
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: 10px; overflow: hidden; transition: all 0.2s;
}
.faq-item summary {
  padding: 18px 22px; font-weight: 700; font-size: 1.05rem; cursor: pointer;
  color: #FFF; list-style: none; display: flex; align-items: center; justify-content: space-between;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--primary-light); transition: transform 0.2s; }
.faq-item[open] summary::after { content: "−"; color: var(--amber-light); }
.faq-item p { padding: 0 22px 20px; color: var(--text-dim); font-size: 0.95rem; line-height: 1.7; }

/* Table */
.data-table {
  width: 100%; border-collapse: collapse; margin: 24px 0;
  background: var(--bg-surface); border-radius: 12px; overflow: hidden;
  border: 1px solid var(--border);
}
.data-table th, .data-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.data-table th { background: rgba(56, 189, 248, 0.1); color: var(--primary-light); font-weight: 700; }
.data-table tr:hover { background: rgba(255,255,255,0.02); }

/* Quick Jump Dock */
.quick-jump-dock {
  position: fixed; right: 24px; bottom: 28px; z-index: 999;
  display: flex; flex-direction: column; gap: 10px;
  transform: translateY(20px); opacity: 0; pointer-events: none;
  transition: all 0.3s ease;
}
.quick-jump-dock.visible { transform: translateY(0); opacity: 1; pointer-events: auto; }
.dock-btn {
  background: var(--bg-surface); border: 1px solid var(--border);
  color: var(--text); padding: 10px 16px; border-radius: 99px;
  text-decoration: none; font-size: 0.85rem; font-weight: 600;
  display: flex; align-items: center; gap: 6px; box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  transition: all 0.2s;
}
.dock-btn:hover { background: var(--bg-card-hover); border-color: var(--primary-light); color: #FFF; }
.dock-btn.primary { background: var(--grad-primary); border: none; color: #FFF; }

/* Ecosystem & Friendly Links */
.footer-friendly-links {
  background: rgba(2, 132, 199, 0.05);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 20px 24px; margin-bottom: 30px;
}
.links-title { font-size: 0.9rem; font-weight: 700; color: var(--primary-light); margin-bottom: 12px; }
.links-flex { display: flex; flex-wrap: wrap; gap: 10px 16px; }
.friendly-link {
  font-size: 0.85rem; color: var(--text-dim); text-decoration: none;
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
  padding: 5px 12px; border-radius: 6px; transition: all 0.2s;
}
.friendly-link:hover, .friendly-link.current {
  background: rgba(56, 189, 248, 0.2); border-color: var(--primary-light); color: #FFF;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border); background: #030812;
  padding: 60px 0 30px; font-size: 0.9rem; color: var(--text-muted);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-about h3 { font-size: 1.15rem; color: #FFF; margin-bottom: 12px; }
.footer-col h4 { font-size: 1rem; color: #FFF; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; text-align: center; }

@media (max-width: 900px) {
  .hero h1 { font-size: 2.1rem; }
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .nav-links { display: none; }
}