/* Crisp Corporate Light SaaS Design for iKuuu VPN (ikuuu.cloud) */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --primary-light: #eff6ff;
  --primary-glow: rgba(37, 99, 235, 0.18);
  --accent-cyan: #0284c7;
  --accent-emerald: #059669;
  --bg-page: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-alt: #f8fafc;
  --bg-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --border-focus: #2563eb;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 10px 30px -10px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 20px 40px -15px rgba(37, 99, 235, 0.12);
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(at 10% 10%, rgba(37, 99, 235, 0.05) 0px, transparent 40%),
    radial-gradient(at 90% 90%, rgba(79, 70, 229, 0.04) 0px, transparent 40%);
  background-attachment: fixed;
}
a { color: var(--primary); text-decoration: none; transition: all 0.2s ease; }
a:hover { color: var(--primary-hover); }

.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* Crisp Light Navbar */
.header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 74px; gap: 20px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; flex-shrink: 0;
}
.brand-pill {
  background: #ffffff;
  padding: 0;
  border-radius: 0;
  display: flex; align-items: center;
  box-shadow: none;
}
.brand-logo-img { height: 38px; width: auto; object-fit: contain; }
.nav-links {
  display: flex; align-items: center; gap: 4px; list-style: none;
  white-space: nowrap; flex-shrink: 0;
}
.nav-links a {
  color: var(--text-muted); font-size: 0.94rem; font-weight: 500;
  padding: 8px 14px; border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary); background: var(--primary-light);
}
.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; font-weight: 600; font-size: 0.92rem;
  padding: 10px 20px; border-radius: 10px;
  cursor: pointer; transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none; border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
}
.btn-outline {
  background: #fff;
  border-color: var(--border-color);
  color: var(--text-main) !important;
  box-shadow: var(--shadow-sm);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary) !important;
}
.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text-main) !important;
}
.btn-secondary:hover {
  background: #e2e8f0;
}

/* Hero Section */
.hero {
  padding: 70px 0 60px;
  position: relative;
}
.hero-grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  gap: 50px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary-light); color: var(--primary);
  padding: 6px 14px; border-radius: 9999px; font-size: 0.86rem;
  font-weight: 600; margin-bottom: 22px;
  border: 1px solid rgba(37, 99, 235, 0.15);
}
.hero-title {
  font-size: 3.2rem; font-weight: 800; line-height: 1.15;
  color: var(--text-main); margin-bottom: 22px;
  letter-spacing: -0.03em;
}
.hero-desc {
  font-size: 1.15rem; color: var(--text-muted);
  line-height: 1.7; margin-bottom: 34px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; padding-top: 24px;
  border-top: 1px solid var(--border-color);
}
.stat-item strong { display: block; font-size: 1.8rem; font-weight: 800; color: var(--primary); }
.stat-item span { font-size: 0.86rem; color: var(--text-dim); }

/* Enterprise Dashboard Card */
.dashboard-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.dash-header {
  background: #f8fafc; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}
.dash-dots { display: flex; gap: 6px; }
.dash-dot { width: 10px; height: 10px; border-radius: 50%; }
.dash-dot.red { background: #ef4444; }
.dash-dot.yellow { background: #f59e0b; }
.dash-dot.green { background: #10b981; }
.dash-title { font-size: 0.84rem; font-weight: 600; color: var(--text-muted); }
.dash-body { padding: 22px; }
.dash-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--bg-alt); margin-bottom: 10px;
  border: 1px solid #f1f5f9;
}
.dash-row:last-child { margin-bottom: 0; }
.dash-node { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 0.92rem; }
.dash-ping { font-size: 0.86rem; color: var(--accent-emerald); font-weight: 700; }
.dash-status-pill {
  background: #dcfce7; color: #15803d;
  font-size: 0.76rem; font-weight: 700; padding: 3px 8px; border-radius: 6px;
}

/* Trust Bar */
.trust-section {
  padding: 30px 0; border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-alt); text-align: center;
}
.trust-label { font-size: 0.9rem; font-weight: 600; color: var(--text-dim); margin-bottom: 16px; }
.trust-badges {
  display: flex; align-items: center; justify-content: center;
  gap: 36px; flex-wrap: wrap;
}
.trust-item {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 1rem; color: var(--text-muted);
}

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-header { text-align: center; max-width: 760px; margin: 0 auto 50px; }
.section-tag {
  color: var(--primary); font-weight: 700; font-size: 0.88rem;
  letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 10px; display: inline-block;
}
.section-title { font-size: 2.3rem; font-weight: 800; color: var(--text-main); margin-bottom: 14px; }
.section-subtitle { font-size: 1.05rem; color: var(--text-muted); line-height: 1.65; }

/* Grid Cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.card {
  background: #ffffff; border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 32px 26px; box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.card:hover {
  transform: translateY(-4px);
  border-color: #cbd5e1;
  box-shadow: var(--shadow-md);
}
.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 20px;
}
.card-title { font-size: 1.25rem; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.card-desc { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; }

/* Comparison Table */
.comp-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  border: 1px solid var(--border-color); border-radius: var(--radius-md);
  overflow: hidden; background: #fff; box-shadow: var(--shadow-sm);
}
.comp-table th, .comp-table td {
  padding: 16px 22px; text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.comp-table th { background: #f8fafc; font-weight: 700; color: var(--text-main); font-size: 0.95rem; }
.comp-table tr:last-child td { border-bottom: none; }
.comp-table td strong { color: var(--text-main); }
.comp-check { color: var(--accent-emerald); font-weight: 800; font-size: 1.1rem; }
.comp-cross { color: var(--text-dim); }

/* Pricing Cards */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.pricing-card {
  background: #fff; border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 36px 28px;
  display: flex; flex-direction: column; justify-content: space-between;
  box-shadow: var(--shadow-sm); position: relative;
  transition: all 0.3s ease;
}
.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 14px 40px -10px rgba(37, 99, 235, 0.25);
  transform: scale(1.02);
}
.pricing-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff;
  padding: 4px 14px; border-radius: 9999px; font-size: 0.78rem; font-weight: 700;
}
.plan-name { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.plan-desc { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 20px; }
.plan-price { font-size: 2.6rem; font-weight: 800; color: var(--text-main); margin-bottom: 24px; }
.plan-price small { font-size: 0.95rem; font-weight: 500; color: var(--text-dim); }
.plan-features { list-style: none; margin-bottom: 28px; }
.plan-features li {
  padding: 8px 0; font-size: 0.92rem; color: var(--text-muted);
  display: flex; align-items: center; gap: 8px;
}

/* FAQ Accordion */
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff; border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); padding: 22px 24px;
  box-shadow: var(--shadow-sm);
}
.faq-q { font-size: 1.08rem; font-weight: 700; color: var(--text-main); margin-bottom: 10px; }
.faq-a { font-size: 0.95rem; color: var(--text-muted); line-height: 1.65; }

/* Global Floating Mascot Jump Button */
.floating-mascot-btn {
  position: fixed; bottom: 28px; right: 28px; z-index: 9999;
  display: flex; align-items: center; gap: 10px;
  background: #ffffff;
  padding: 8px 16px 8px 10px; border-radius: 9999px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.15), 0 2px 6px rgba(0, 0, 0, 0.08);
  border: 1px solid #e2e8f0;
  cursor: pointer; text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.floating-mascot-btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.25);
  border-color: var(--primary);
}
.mascot-avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.mascot-text { display: flex; flex-direction: column; }
.mascot-title { font-weight: 800; font-size: 0.88rem; color: var(--text-main); }
.mascot-sub { font-size: 0.75rem; color: var(--primary); font-weight: 600; }

/* Footer */
.footer {
  background: #0f172a; color: #94a3b8;
  padding: 60px 0 30px; font-size: 0.9rem;
}
.footer-top {
  display: grid; grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px; margin-bottom: 50px;
}
.footer-brand-title { color: #fff; font-size: 1.25rem; font-weight: 800; margin-bottom: 12px; }
.footer-brand-desc { color: #64748b; line-height: 1.6; margin-bottom: 20px; font-size: 0.9rem; }
.footer-col h4 { color: #fff; font-size: 0.98rem; font-weight: 700; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { color: #94a3b8; font-size: 0.88rem; }
.footer-col a:hover { color: #fff; }

.footer-bottom {
  padding-top: 30px; border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px;
}

/* Friendly Links */
.footer-friendly-links {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px; padding: 22px; margin-bottom: 35px;
}
.links-title {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px; border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 10px;
}
.links-badge { font-weight: 700; color: #fff; font-size: 0.95rem; }
.links-desc { color: #64748b; font-size: 0.82rem; }
.links-flex { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.friendly-link {
  display: flex; align-items: center; gap: 10px;
  background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 10px 14px; border-radius: 8px; text-decoration: none; transition: all 0.2s;
}
.friendly-link:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.2); }
.friendly-link.current { border-color: var(--primary); background: rgba(37, 99, 235, 0.15); }
.fl-dot { width: 8px; height: 8px; border-radius: 50%; background: #2563eb; flex-shrink: 0; }
.fl-text strong { display: block; color: #fff; font-size: 0.88rem; }
.fl-text small { color: #64748b; font-size: 0.76rem; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .pricing-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}